CN113202551A - System and method for accurately preparing and filling coarse aggregate and tail mortar - Google Patents
System and method for accurately preparing and filling coarse aggregate and tail mortar Download PDFInfo
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- CN113202551A CN113202551A CN202110550612.8A CN202110550612A CN113202551A CN 113202551 A CN113202551 A CN 113202551A CN 202110550612 A CN202110550612 A CN 202110550612A CN 113202551 A CN113202551 A CN 113202551A
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- 239000004570 mortar (masonry) Substances 0.000 title claims abstract description 65
- 238000000034 method Methods 0.000 title claims abstract description 31
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 107
- 239000002002 slurry Substances 0.000 claims abstract description 97
- 238000002360 preparation method Methods 0.000 claims abstract description 91
- 239000004568 cement Substances 0.000 claims abstract description 85
- 238000003860 storage Methods 0.000 claims abstract description 54
- 230000008719 thickening Effects 0.000 claims abstract description 34
- 239000000463 material Substances 0.000 claims abstract description 26
- 239000004576 sand Substances 0.000 claims abstract description 18
- 230000008569 process Effects 0.000 claims abstract description 10
- 230000003068 static effect Effects 0.000 claims abstract description 6
- 239000002562 thickening agent Substances 0.000 claims description 32
- 238000005303 weighing Methods 0.000 claims description 21
- 230000001105 regulatory effect Effects 0.000 claims description 19
- 238000007599 discharging Methods 0.000 claims description 14
- 238000007865 diluting Methods 0.000 claims description 8
- 238000005189 flocculation Methods 0.000 claims description 7
- 230000016615 flocculation Effects 0.000 claims description 7
- 238000005259 measurement Methods 0.000 claims description 7
- 238000004062 sedimentation Methods 0.000 claims description 5
- 230000009471 action Effects 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 125000004122 cyclic group Chemical group 0.000 claims description 2
- 238000000265 homogenisation Methods 0.000 claims description 2
- 238000004537 pulping Methods 0.000 claims 1
- 230000007547 defect Effects 0.000 abstract description 4
- 238000005429 filling process Methods 0.000 abstract description 3
- 238000003756 stirring Methods 0.000 abstract description 3
- 230000006872 improvement Effects 0.000 description 8
- 230000006870 function Effects 0.000 description 7
- 238000012544 monitoring process Methods 0.000 description 6
- 230000003139 buffering effect Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000003311 flocculating effect Effects 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F15/00—Methods or devices for placing filling-up materials in underground workings
- E21F15/005—Methods or devices for placing filling-up materials in underground workings characterised by the kind or composition of the backfilling material
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/12—Waste materials; Refuse from quarries, mining or the like
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F15/00—Methods or devices for placing filling-up materials in underground workings
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00724—Uses not provided for elsewhere in C04B2111/00 in mining operations, e.g. for backfilling; in making tunnels or galleries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Ceramic Engineering (AREA)
- Organic Chemistry (AREA)
- Geology (AREA)
- Geochemistry & Mineralogy (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Civil Engineering (AREA)
- Preparation Of Clay, And Manufacture Of Mixtures Containing Clay Or Cement (AREA)
Abstract
The invention provides a system and a method for accurately preparing and filling coarse aggregate and tail mortar. The system comprises a tail mortar concentration storage and metering system, a coarse aggregate metering and feeding system, a cement metering and feeding system, a concentration adjusting water metering and feeding system, a filling slurry preparation system and an automatic control system, wherein the filling slurry preparation system and the automatic control system are respectively connected with the systems. The method adopts a static metering-periodic preparation circulating process, and can realize accurate metering of each filling material; the stirring time of the stirrer can be set at will, so that the filling material is fully stirred, and the high-quality preparation of the filling slurry is guaranteed; the technical defects of poor filling slurry preparation quality, poor slurry pipeline conveying reliability, high filling cost and the like caused by low filling material metering precision, large error, large sand discharge concentration fluctuation of tailing thickening equipment and the like in the conventional coarse aggregate cemented filling process in the prior art are effectively overcome.
Description
Technical Field
The invention relates to the technical field of mine solid waste filling, in particular to a system and a method for accurately preparing and filling coarse aggregate and tail mortar.
Background
The filling body prepared by the coarse aggregate cemented filling system has higher compressive strength and is widely applied to underground mines with broken ore rocks.
However, at present, a conventional mine cemented and filled with coarse aggregate generally adopts a continuous preparation process, and the coarse aggregate (such as crushed gravel, gobi aggregate, filter-pressed tailings and the like) has different water content changes, self viscosity, grain size composition and the like due to storage time, so that the quality and the property of the coarse aggregate are unstable, the problems of material blockage, material adhesion and the like exist in the links of unloading, metering, conveying and the like, the concentration fluctuation of the filling slurry is large, the preparation quality is poor, and the reliable conveying of the slurry, the strength of an underground filling body and the like are directly influenced. Besides aggregate, the cementing material also has the problem of arching, so that the feeding amount cannot be reliably controlled in the continuous preparation process of slurry. The fluctuating filling concentration will affect the preparation effect of the filling slurry and the strength of the underground filling body, and many mines often have to adopt higher sand-lime ratio to obtain higher strength of the filling body in order to ensure the operation safety, thereby increasing the filling cost and increasing the burden of enterprises. For the mine with long-distance conveying of filling slurry, accurate high-quality preparation of the filling slurry is required to be ensured so as to ensure reliable conveying of the slurry and avoid pipe blockage accidents.
In addition, the traditional mine adopting tailing thickening equipment such as a sand silo or a deep cone thickener also gradually reduces the sand discharge concentration along with the reduction of the sand surface in the silo, which greatly influences the filling quality. In the mine which is partially cemented and filled by the coarse aggregate, tailings produced by a dressing plant are not added in the preparation of filling slurry, and in order to ensure that the coarse aggregate filling slurry has good conveying characteristics, the using amount of cementing materials (such as cement, fly ash and the like) is increased frequently so as to ensure the reasonability of the particle size distribution of the filling materials. Because the cost of the cementing material is higher, the filling cost is greatly increased, and the mill tailings can not be reasonably recycled.
The invention patent with publication number CN108915765A provides a filling system and a filling method for underground full tailings-waste stone paste. The filling system is built and operated in an underground chamber or an underground roadway; the filling system comprises a paste thickener, a cement bin, a horizontal sand bin, an overflow water bin, a stirrer and a filling delivery pump which are arranged underground; the system also comprises a cement transfer bin arranged on the ground surface and used for temporarily storing cement and a factory for producing low-concentration full-tail mortar. Conveying the low-concentration full-tailing slurry produced by the plant selection to the paste thickener for tailing dehydration through a tailing conveying drill hole arranged on the ground surface to prepare high-concentration full-tailing slurry; the horizontal sand silo and the overflow water silo are both connected with the paste thickener, the horizontal sand silo is used for accident treatment slurry, and the overflow water silo is used for storing clarified overflow water of the paste thickener; and cement in the cement transfer bin is conveyed to the underground cement bin through a cement conveying drill hole arranged on the ground surface. However, the filling system has the technical defects that accurate measurement cannot be carried out, the metering accuracy is poor, and the system is difficult to maintain and detect when being arranged underground.
In view of the above, there is a need to design an improved system and method for accurately preparing and filling coarse aggregate in cooperation with tail mortar to solve the above problems.
Disclosure of Invention
The invention aims to provide a system and a method for accurately preparing and filling coarse aggregate and tail mortar.
In order to realize the aim, the invention provides a coarse aggregate and tail mortar cooperated accurate preparation and filling system, which comprises a tail mortar concentration storage and metering system, a coarse aggregate metering and feeding system, a cement metering and feeding system, a thickening water metering and feeding system, a filling slurry preparation system and an automatic control system, wherein the filling slurry preparation system and the automatic control system are respectively connected with the systems;
the tail mortar thickening storage and metering system comprises a paste storage thickener, an underflow metering buffer hopper and an underflow conveying pipeline, wherein two ends of the underflow conveying pipeline are respectively connected with the paste storage thickener and the underflow metering buffer hopper; the paste storage thickener comprises a step valve arranged at the upper part of the paste storage thickener and a homogenization slurry making device arranged at the bottom of the paste storage thickener;
the control system is respectively and electrically connected with the tail mortar dense storage and metering system, the coarse aggregate metering and feeding system, the cement metering and feeding system, the thickening water metering and feeding system and the filling slurry preparation system.
As a further improvement of the invention, the tail mortar concentration storage and metering system further comprises a first regulating valve, a first electromagnetic flow meter and a concentration meter which are arranged on the underflow conveying pipeline.
As a further improvement of the invention, the tail mortar dense storage and metering system further comprises an air compressor connected with the paste storage thickener and a self-diluting flocculation sedimentation feeding barrel arranged at the top of the paste storage thickener.
As a further improvement of the invention, the tail mortar dense storage and metering system further comprises a slurry pump connected with the underflow conveying pipeline; the slurry pump is electrically connected with the automatic control system.
As a further improvement of the invention, the coarse aggregate metering and feeding system comprises a batching machine, a conveying belt and a coarse aggregate metering buffer hopper which are sequentially communicated.
As a further improvement of the invention, the cement metering and feeding system comprises a cement bin for storing cement, a screw conveyor connected with the bottom of the cement bin and a cement metering buffer hopper arranged above the filling slurry preparation system.
As a further improvement of the invention, the concentrated water metering and feeding system comprises a high-level water tank for storing concentrated water, a concentrated water metering and caching hopper and a concentrated water conveying pipeline, wherein two ends of the concentrated water conveying pipeline are respectively connected with the high-level water tank and the concentrated water metering and caching hopper;
and a second regulating valve and a second electromagnetic flowmeter which are respectively and electrically connected with the automatic control system are arranged on the concentrated water regulating and conveying pipeline.
As a further improvement of the present invention, the filling slurry preparation system is a horizontal forced mixer.
As a further improvement of the invention, the underflow metering buffer hopper comprises a weighing sensor arranged in the underflow metering buffer hopper and a discharge valve arranged at the bottom of the underflow metering buffer hopper; the weighing sensor and the discharge valve are respectively electrically connected with the automatic control system.
In order to achieve the purpose, the invention also provides a filling slurry preparation and filling method, the coarse aggregate and the tail mortar are adopted to accurately prepare the filling system for preparation, a static metering-periodic preparation cyclic process is adopted, and the method comprises the following steps:
s1, preparing tail mortar: a tail mortar thickening storage and metering system is adopted, the tail sand is conveyed to a paste storage thickener for concentration after being settled by a self-diluting flocculation sedimentation feeding barrel, and an air compressor is opened before filling to carry out full-bin slurry making; when filling is needed, under the action of a slurry pump, the underflow is pumped into an underflow metering buffer hopper arranged at the upper part of the horizontal forced mixer through an underflow conveying pipeline; setting the required underflow amount for preparing a period through an automatic control system, and automatically closing a slurry pump by the automatic control system when the underflow amount reaches a set value during filling operation, stopping feeding, and finishing the metering of the underflow; the weighed tail mortar is temporarily stored in an underflow metering buffer hopper, and is automatically discharged into a horizontal forced mixer when the subsequent filling slurry preparation process is carried out;
s2, coarse aggregate metering and feeding: a coarse aggregate metering and feeding system is adopted, and coarse aggregates prepared by a proportioning machine are conveyed into a coarse aggregate metering buffer hopper positioned at the upper part of a horizontal forced mixer through a conveying belt; setting the amount of coarse aggregate required by preparation in one period through an automatic control system, and automatically closing a proportioning machine by the automatic control system when the weight of the coarse aggregate reaches a set value during filling operation, stopping feeding and finishing the metering of the coarse aggregate; the weighed coarse aggregate is temporarily stored in a coarse aggregate metering buffer hopper, and is automatically discharged into a horizontal forced mixer when the subsequent filling slurry preparation process is carried out;
s3, cement metering and feeding: a cement metering and feeding system is adopted to convey cement stored in a cement bin into a cement metering buffer hopper positioned at the upper part of the horizontal forced mixer through a screw conveyor at the bottom of the bin; setting the weight of cement required by preparation in one period through an automatic control system, and automatically closing a screw conveyor by the automatic control system when the weight of the cement reaches a set value during filling operation, stopping feeding and finishing the metering of the cement; temporarily storing the weighed cement in a cement metering buffer hopper, and automatically discharging the cement into a horizontal forced mixer when the subsequent filling slurry preparation process is carried out;
s4, metering and feeding of concentrated water: the concentrated water stored in the high-level water tank is automatically conveyed into a concentrated water metering buffer hopper positioned at the upper part of the horizontal forced mixer through a concentrated water conveying pipeline and a second regulating valve by adopting a concentrated water metering and feeding system; setting the weight of the concentrated water required by preparation in one period through an automatic control system, and automatically closing a second regulating valve by the automatic control system when the weight of the concentrated water reaches a set value during filling operation, stopping water inflow and finishing the metering of the concentrated water; the weighed thickening water is temporarily stored in a thickening water metering buffer hopper, and is automatically discharged into a horizontal forced mixer when the subsequent filling slurry preparation process is carried out;
s5, preparing filling slurry: the automatic control system starts a filling slurry preparation system, the measured tail mortar, coarse aggregate, cement and thickening water are automatically discharged into a horizontal forced mixer, the horizontal forced mixer prepares the filling slurry, and meanwhile, a tail mortar thickening storage and measurement system, a coarse aggregate measuring and feeding system, a cement measuring and feeding system and a thickening water measuring and feeding system respectively perform a circulating process step of measuring and caching the filling material; after the horizontal forced mixer completes preparation and discharging of the filling slurry in one period, automatically closing a filling slurry discharging valve arranged at the bottom of the horizontal forced mixer through an automatic control system;
then the automatic control system respectively opens the discharge valves on the underflow metering buffer hopper, the coarse aggregate metering buffer hopper, the cement metering buffer hopper and the thickening water metering buffer hopper, the filling material is automatically discharged into the horizontal forced mixer through the discharge valves, the horizontal forced mixer carries out the mixing treatment of the next period and automatically discharges the filling slurry; under the regulation and control of an automatic control system, the metering buffer hoppers continuously and circularly measure and buffer the filling materials.
The invention has the beneficial effects that:
1. according to the method for accurately preparing and filling the coarse aggregate and the tail mortar, the accurate metering of each filling material can be realized by adopting a static metering-periodic preparation circulation process; the stirring time of the stirrer can be set at will, so that the filling material is fully stirred, and the high-quality preparation of the filling slurry is guaranteed; the technical defects of poor filling slurry preparation quality, poor slurry pipeline conveying reliability, high filling cost and the like caused by low filling material metering precision, large error, large sand discharge concentration fluctuation of tailing thickening equipment and the like in the conventional coarse aggregate cemented filling process in the prior art are effectively overcome.
2. The coarse aggregate and the tailing mortar are cooperatively filled, so that the strength of a filling body is improved while the coarse aggregate and the tailing are recycled, and the problem of safe mining of broken ore deposits is solved.
3. According to the coarse aggregate and tail mortar coordinated precise preparation filling system, the step valve is arranged at the upper part of the paste storage thickener, and the step valve is opened to discharge upper clear water before sand discharge, so that the sand discharge concentration can be further improved; in addition, a homogenizing and slurry-making device is arranged at the bottom of the paste storage thickener, an air compressor is started to make slurry in the whole bin, the tail mortar concentration in the bin is homogenized, the sand discharge concentration is ensured not to fluctuate, and the preparation of the cemented filling slurry is ensured.
4. According to the coarse aggregate and tail mortar coordinated precise preparation filling system, the metering and cache feeding processes of all filling material subsystems are efficient and precise through precise regulation and control of the automatic control system, a full-automatic periodic preparation circulating process can be realized, the labor cost is saved, and the metering precision is ensured.
Drawings
FIG. 1 is a frame diagram of a coarse aggregate and tail mortar precise preparation and filling system provided by the invention.
Reference numerals
100-coarse aggregate is cooperated with tail mortar to prepare a filling system accurately; 10-a tail mortar dense storage and metering system; 11-paste storage thickener; 12-an underflow transport conduit; 13-underflow metering buffer hopper; 14-a first regulating valve; 15-a first electromagnetic flow meter; 16-concentration meter; 17-an air compressor; 18-slurry pump; 19-self-diluting flocculating settling feed barrel; 20-coarse aggregate metering and feeding system; 21-a dosing machine; 22-a conveyor belt; 23-coarse aggregate metering buffer hopper; 30-cement metering and feeding system; 31-a cement silo; 32-a screw conveyor; 33-cement metering buffer hopper; 40-a concentrated water adjusting metering feeding system; 41-high water pool; 42-a concentrated water delivery pipeline; 43-concentrated water metering buffer hopper; 44-a second regulating valve; 45-a second electromagnetic flow meter; 50-a filling slurry preparation system; and 60, an automatic control system.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
It should be noted that, in order to avoid obscuring the present invention with unnecessary details, only the structures and/or processing steps closely related to the aspects of the present invention are shown in the drawings, and other details not closely related to the present invention are omitted.
In addition, it is also to be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Referring to fig. 1, the present invention provides a coarse aggregate and tail mortar coordinated precise preparation and filling system 100, which includes a tail mortar dense storage and metering system 10, a coarse aggregate metering and feeding system 20, a cement metering and feeding system 30, a thickening water metering and feeding system 40, a filling slurry preparation system 50 and an automatic control system 60 respectively connected to the above systems.
The tail mortar thickening storage and metering system 10 comprises a paste body storage thickener 11, an underflow metering buffer hopper 13, an underflow conveying pipeline 12, an air compressor 17, a self-diluting flocculation sedimentation feeding barrel 19, a slurry pump 18 and a first regulating valve 14, a first electromagnetic flow meter 15 and a concentration meter 16, wherein two ends of the underflow conveying pipeline 12 are respectively connected with the paste body storage thickener 11 and the underflow metering buffer hopper 13, the air compressor 17 is connected with the paste body storage thickener 11, the self-diluting flocculation sedimentation feeding barrel 19 is arranged at the top of the paste body storage thickener 11, the slurry pump 18 is connected with the underflow conveying pipeline 12, and the first regulating valve 14, the first electromagnetic flow meter 15 and the concentration meter 16 are sequentially arranged on the underflow conveying pipeline 12.
In the present embodiment, the paste storage thickener 11 includes a step valve 111 disposed at an upper portion thereof and a homogenizing and slurry making device 112 disposed at a bottom portion thereof. The step valve 111 is structurally arranged, and before sand discharging, the step valve is opened to discharge clear water at the upper part, so that the sand discharging concentration can be further improved; in addition, the homogenizing and slurry-making device 112 at the bottom of the paste storage thickener is used for starting the air compressor to make slurry in the whole bin, so that the tail mortar concentration in the bin is homogenized, the sand discharge concentration is ensured not to fluctuate, and the preparation of the cemented filling slurry is ensured.
The slurry pump 18 is electrically connected to the automatic control system 60. The underflow metering buffer hopper 13 comprises a weighing sensor (not marked in the figure) arranged in the underflow metering buffer hopper and a discharge valve (not marked in the figure) arranged at the bottom of the underflow metering buffer hopper, and has the functions of metering and buffering; the weighing sensor and the discharge valve are electrically connected with the automatic control system 60 respectively.
Referring to fig. 1, the coarse aggregate metering and feeding system 20 includes a batching machine 21, a conveying belt 22 and a coarse aggregate metering buffer hopper 23 which are sequentially connected.
The coarse aggregate metering buffer hopper 23 comprises a coarse aggregate weighing sensor (not marked in the figure) arranged in the coarse aggregate metering buffer hopper and a coarse aggregate discharging valve (not marked in the figure) arranged at the bottom of the coarse aggregate weighing sensor, and has the functions of metering and buffering; the coarse aggregate weighing sensor and the coarse aggregate discharge valve are respectively electrically connected with the automatic control system 60.
The cement metering and feeding system 30 comprises a cement bin 31 for storing cement, a screw conveyor 32 connected with the bottom of the cement bin 31, and a cement metering buffer hopper 33 arranged above the filling slurry preparation system 50.
The cement metering buffer hopper 33 comprises a cement weighing sensor (not marked in the figure) arranged in the cement metering buffer hopper and a cement discharging valve (not marked in the figure) arranged at the bottom of the cement metering buffer hopper, and has the functions of metering and buffering; the cement weighing sensor and the cement discharging valve are respectively electrically connected with the automatic control system 60.
The concentrated water metering and feeding system 40 comprises a high-level water tank 41 for storing concentrated water, a concentrated water metering and caching hopper 43 and a concentrated water conveying pipeline 42, wherein two ends of the concentrated water conveying pipeline 42 are respectively connected with the high-level water tank 41 and the concentrated water metering and caching hopper 43; and a second regulating valve 44 and a second electromagnetic flow meter 45 which are respectively and electrically connected with the automatic control system 60 are arranged on the concentrated water regulating and conveying pipeline 42, so that the control and monitoring of the amount of concentrated water are realized.
The concentrated water metering buffer hopper 43 comprises a concentrated water weighing sensor (not marked in the figure) arranged in the concentrated water metering buffer hopper and a concentrated water discharging valve (not marked in the figure) arranged at the bottom of the concentrated water metering buffer hopper, and has the functions of metering and buffering; the concentrated water adjusting weighing sensor and the concentrated water adjusting discharge valve are respectively electrically connected with the automatic control system 60.
The filling slurry preparation system 50 is a horizontal forced mixer.
In the present embodiment, the control system 60 is electrically connected to the tail mortar concentration storage and metering system 10, the coarse aggregate metering and feeding system 20, the cement metering and feeding system 30, the thickening water metering and feeding system 40, and the filling slurry preparation system 50, respectively.
Example 1
The invention provides a filling slurry preparation filling method, which adopts the coarse aggregate and tail mortar cooperated precise preparation filling system for preparation, adopts a static metering-periodic preparation circulation process, and comprises the following steps:
s1, preparing tail mortar: a tail mortar thickening storage and metering system 10 is adopted, after tailing is settled through a self-diluting flocculation settlement feeding barrel 19, the tailing is conveyed to a paste storage thickener 11 for concentration, an air compressor 17 is opened before filling for full-warehouse slurry making, the homogeneity of slurry filled in a warehouse is ensured, and the concentration is unchanged during sand discharging. When filling is needed, under the action of a slurry pump 18, the underflow is pumped into an underflow metering buffer hopper 13 arranged at the upper part of the horizontal forced mixer through an underflow conveying pipeline 12; the underflow metering buffer hopper 13 is provided with a weighing sensor, the bottom of the underflow metering buffer hopper is provided with a discharge valve, and the underflow metering buffer hopper has the functions of metering and buffer storage. The underflow conveying pipeline 12 is provided with a first regulating valve 14, a first electromagnetic flow meter 15 and a concentration meter 16, so that the underflow flow control and concentration monitoring of the paste storage thickener 11 are realized.
The required underflow amount is prepared in one period through the automatic control system 60, during filling operation, the underflow enters the underflow metering buffer hopper 13 through the underflow pump 18 and the underflow conveying pipeline 12, the weighing sensor monitors the underflow weight in the hopper in real time, when the underflow amount reaches a set value, the automatic control system 60 automatically closes the underflow pump 18, feeding is stopped, and underflow metering is completed.
The weighed tail mortar is temporarily stored in the underflow metering buffer hopper 13 and is automatically discharged into the horizontal forced mixer when the subsequent filling slurry preparation process is carried out.
S2, coarse aggregate metering and feeding: adopting a coarse aggregate metering and feeding system 20, conveying the coarse aggregates prepared by a proportioning machine 21 into a coarse aggregate metering buffer hopper 23 positioned at the upper part of a horizontal forced mixer through a conveying belt 22; the coarse aggregate metering buffer hopper 23 is provided with a weighing sensor, the bottom of the coarse aggregate metering buffer hopper is provided with an unloading valve, and the coarse aggregate metering buffer hopper has the functions of metering and buffering.
Setting the amount of coarse aggregate required by preparation in one period through the automatic control system 60, feeding the coarse aggregate into the coarse aggregate metering buffer hopper 23 through the batching machine 21 and the conveying belt 22 during filling operation, monitoring the weight of the coarse aggregate in the hopper in real time by a weighing sensor, and automatically closing the batching machine 21 by the automatic control system 60 when the weight of the coarse aggregate reaches a set value, stopping feeding and finishing metering of the coarse aggregate; the weighed coarse aggregate is temporarily stored in the coarse aggregate metering buffer hopper 23, and is automatically discharged into the horizontal forced mixer when the subsequent filling slurry preparation process is carried out.
S3, cement metering and feeding: a cement metering and feeding system 30 is adopted to convey cement stored in a cement bin 31 into a cement metering buffer hopper 33 positioned at the upper part of the horizontal forced mixer through a screw conveyor 32 at the bottom of the bin; be equipped with weighing sensor on the cement measurement buffer memory fill 33, the bottom is equipped with the valve of unloading, has the effect of measurement and buffer memory concurrently.
Setting a cement weight required by preparation in one period through the automatic control system 60, enabling cement to enter the cement metering buffer hopper 33 through the screw conveyor 32 during filling operation, monitoring the weight of the cement in the hopper in real time by a weighing sensor, and automatically closing the screw conveyor 32 by the automatic control system 60 when the weight of the cement reaches a set value, stopping feeding, and metering the cement; the weighed cement is temporarily stored in the cement metering buffer hopper 33, and is automatically discharged into the horizontal forced mixer when the subsequent filling slurry preparation process is carried out.
S4, metering and feeding of concentrated water: the concentrated water metering and feeding system 40 is adopted to automatically convey the concentrated water stored in the high-level water tank 41 to a concentrated water metering buffer hopper 43 positioned at the upper part of the horizontal forced mixer through a concentrated water conveying pipeline 42 and a second regulating valve 44; and a second regulating valve 44 and a second electromagnetic flowmeter 45 are arranged on the concentrated water conveying pipeline 42, so that the control and monitoring of the amount of concentrated water are realized. The concentrated water metering buffer hopper 43 is provided with a weighing sensor, the bottom of the concentrated water metering buffer hopper is provided with a discharge valve, and the concentrated water metering buffer hopper has the functions of metering and buffer storage.
Setting the weight of the concentrated water required by preparation in one period through the automatic control system 60, feeding the concentrated water into the concentrated water metering buffer hopper 43 through the concentrated water conveying pipeline 42 during filling operation, monitoring the weight of the concentrated water in the hopper in real time by a weighing sensor, and automatically closing the second regulating valve 44 by the automatic control system 60 when the weight of the concentrated water reaches a set value, stopping water feeding and finishing metering of the concentrated water; the weighed thickening water is temporarily stored in a thickening water metering buffer hopper 43, and is automatically discharged into a horizontal forced mixer when the subsequent filling slurry preparation process is carried out;
s5, preparing filling slurry: the automatic control system 60 starts the filling slurry preparation system 50, the measured tail mortar, coarse aggregate, cement and thickening water are automatically discharged into the horizontal forced mixer, the horizontal forced mixer prepares the filling slurry, and meanwhile, the tail mortar thickening storage and measurement system 10, the coarse aggregate measuring and feeding system 20, the cement measuring and feeding system 30 and the thickening water measuring and feeding system 40 respectively perform the circulating process steps of measuring and caching the filling material; after the horizontal forced mixer completes preparation and discharging of the filling slurry for one period, a filling slurry discharging valve arranged at the bottom of the horizontal forced mixer is automatically closed through an automatic control system 60;
then the automatic control system 60 respectively opens the discharge valves on the underflow metering buffer hopper 13, the coarse aggregate metering buffer hopper 23, the cement metering buffer hopper 33 and the thickening water metering buffer hopper 43, the filling material is automatically discharged into the horizontal forced mixer through the discharge valves, the horizontal forced mixer is used for carrying out the next period of mixing treatment, and the filling slurry is automatically discharged; under the control of the automatic control system 60, the metering buffer hoppers continuously and circularly measure and buffer the filling materials.
The preparation process can ensure the accurate metering of the filling material and the high-quality preparation of the filling slurry.
In conclusion, the invention provides a system and a method for accurately preparing and filling coarse aggregate and tail mortar. The system comprises a tail mortar concentration storage and metering system, a coarse aggregate metering and feeding system, a cement metering and feeding system, a concentration adjusting water metering and feeding system, a filling slurry preparation system and an automatic control system, wherein the filling slurry preparation system and the automatic control system are respectively connected with the systems. The method adopts a static metering-periodic preparation circulating process, and can realize accurate metering of each filling material; the stirring time of the stirrer can be set at will, so that the filling material is fully stirred, and the high-quality preparation of the filling slurry is guaranteed; the technical defects of poor filling slurry preparation quality, poor slurry pipeline conveying reliability, high filling cost and the like caused by low filling material metering precision, large error, large sand discharge concentration fluctuation of tailing thickening equipment and the like in the conventional coarse aggregate cemented filling process in the prior art are effectively overcome.
Although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the spirit and scope of the present invention.
Claims (10)
1. The utility model provides a coarse aggregate is accurate preparation filling system of tail mortar in coordination which characterized in that: the coarse aggregate and tail mortar coordinated accurate preparation filling system (100) comprises a tail mortar dense storage and metering system (10), a coarse aggregate metering and feeding system (20), a cement metering and feeding system (30), a thickening water metering and feeding system (40), a filling slurry preparation system (50) and an automatic control system (60), wherein the filling slurry preparation system (50) and the automatic control system are respectively connected with the systems;
the tail mortar thickening storage and metering system (10) comprises a paste storage thickener (11), an underflow metering buffer hopper (13) and an underflow conveying pipeline (12) of which two ends are respectively connected with the paste storage thickener (11) and the underflow metering buffer hopper (13); the paste storage thickener (11) comprises a step valve (111) arranged at the upper part of the paste storage thickener and a homogenization slurry making device (112) arranged at the bottom of the paste storage thickener;
the control system (60) is respectively and electrically connected with the tail mortar concentration storage and metering system (10), the coarse aggregate metering and feeding system (20), the cement metering and feeding system (30), the thickening water metering and feeding system (40) and the filling slurry preparation system (50).
2. The coarse aggregate and tail mortar cooperative accurate preparation and filling system according to claim 1, wherein the system comprises: the tail mortar concentration storage and metering system (10) further comprises a first regulating valve (14), a first electromagnetic flow meter (15) and a concentration meter (16) which are arranged on the underflow conveying pipeline (12).
3. The coarse aggregate and tail mortar cooperative accurate preparation and filling system according to claim 1, wherein the system comprises: the tail mortar dense storage and metering system (10) further comprises an air compressor (17) connected with the paste storage thickener (11) and a self-diluting flocculation sedimentation feeding barrel (19) arranged at the top of the paste storage thickener (11).
4. The coarse aggregate and tail mortar cooperative accurate preparation and filling system according to claim 1, wherein the system comprises: the tail mortar thickening storage and metering system (10) further comprises a slurry pump (18) connected with the underflow conveying pipeline (12); the slurry pump (18) is electrically connected with the automatic control system (60).
5. The coarse aggregate and tail mortar cooperative accurate preparation and filling system according to claim 1, wherein the system comprises: coarse aggregate measures feed system (20) including proportioning machine (21), conveyor belt (22) and coarse aggregate measurement buffer memory fill (23) that communicate in proper order.
6. The coarse aggregate and tail mortar cooperative accurate preparation and filling system according to claim 1, wherein the system comprises: the cement metering and feeding system (30) comprises a cement bin (31) for storing cement, a screw conveyor (32) connected with the bottom of the cement bin (31) and a cement metering buffer hopper (33) arranged above the filling slurry preparation system (50).
7. The coarse aggregate and tail mortar cooperative accurate preparation and filling system according to claim 1, wherein the system comprises: the concentrated water metering and feeding system (40) comprises a high-level water tank (41) for storing concentrated water, a concentrated water metering and caching hopper (43) and a concentrated water conveying pipeline (42) of which the two ends are respectively connected with the high-level water tank (41) and the concentrated water metering and caching hopper (43);
and a second regulating valve (44) and a second electromagnetic flowmeter (45) which are respectively and electrically connected with the automatic control system (60) are arranged on the concentrated water delivery pipeline (42).
8. The coarse aggregate and tail mortar cooperative accurate preparation and filling system according to claim 1, wherein the system comprises: the filling slurry preparation system (50) is a horizontal forced mixer.
9. The coarse aggregate and tail mortar cooperative accurate preparation and filling system according to claim 1, wherein the system comprises: the underflow metering buffer hopper (13) comprises a weighing sensor arranged in the underflow metering buffer hopper and a discharge valve arranged at the bottom of the underflow metering buffer hopper; the weighing sensor and the discharge valve are respectively and electrically connected with the automatic control system (60).
10. A filling method for preparing filling slurry is characterized in that: the coarse aggregate and tail mortar precise preparation filling system is prepared by adopting the coarse aggregate and tail mortar precise preparation filling system of any one of claims 1 to 9, and a cyclic process of static metering-periodic preparation is adopted, and the method comprises the following steps:
s1, preparing tail mortar: a tail mortar thickening storage and metering system (10) is adopted, the tail sand is settled by a self-diluting flocculation settlement feeding barrel (19), then is conveyed to a paste storage thickener (11) for concentration, and before filling, an air compressor (17) is opened for full-warehouse pulping; when filling is needed, under the action of a slurry pump (18), the underflow is pumped into an underflow metering buffer hopper (13) arranged at the upper part of the horizontal forced mixer through an underflow conveying pipeline (12); the required underflow amount for preparing a period is set through the automatic control system (60), and when the underflow amount reaches a set value during filling operation, the automatic control system (60) automatically closes the slurry pump (18), stops feeding and finishes the metering of the underflow; the weighed tail mortar is temporarily stored in an underflow metering buffer hopper (13), and is automatically discharged into a horizontal forced mixer when the subsequent filling slurry preparation process is carried out;
s2, coarse aggregate metering and feeding: a coarse aggregate metering and feeding system (20) is adopted to convey the coarse aggregates prepared by the proportioning machine (21) to a coarse aggregate metering buffer hopper (23) positioned at the upper part of the horizontal forced mixer through a conveying belt (22); the amount of the coarse aggregate required by preparation in one period is set by the automatic control system (60), and during filling operation, when the weight of the coarse aggregate reaches a set value, the automatic control system (60) automatically closes the dosing machine (21), stops feeding and finishes the metering of the coarse aggregate; the weighed coarse aggregate is temporarily stored in a coarse aggregate metering buffer hopper (23), and is automatically discharged into a horizontal forced mixer when the subsequent filling slurry preparation process is carried out;
s3, cement metering and feeding: a cement metering and feeding system (30) is adopted to convey cement stored in a cement bin (31) into a cement metering buffer hopper (33) positioned at the upper part of the horizontal forced mixer through a screw conveyor (32) at the bottom of the bin; setting the cement weight required by preparation in one period through the automatic control system (60), and automatically closing the screw conveyor (32) by the automatic control system (60) when the cement weight reaches a set value during filling operation, stopping feeding and finishing the metering of cement; the weighed cement is temporarily stored in a cement metering buffer hopper (33), and is automatically discharged into a horizontal forced mixer when the subsequent filling slurry preparation process is carried out;
s4, metering and feeding of concentrated water: the concentrated water stored in the high-level water tank (41) is automatically conveyed into a concentrated water metering buffer hopper (43) positioned at the upper part of the horizontal forced mixer through a concentrated water conveying pipeline (42) and a second regulating valve (44) by adopting a concentrated water metering and feeding system (40); setting the weight of the concentrated water required by preparation in one period through the automatic control system (60), and automatically closing the second regulating valve (44) by the automatic control system (60) when the weight of the concentrated water reaches a set value during filling operation, stopping water inflow and finishing the metering of the concentrated water; the weighed thickening water is temporarily stored in a thickening water metering buffer hopper (43), and is automatically discharged into a horizontal forced stirrer when the subsequent filling slurry preparation process is carried out;
s5, preparing filling slurry: the automatic control system (60) starts a filling slurry preparation system (50), the measured tail mortar, coarse aggregate, cement and thickening water are automatically discharged into a horizontal forced mixer, the horizontal forced mixer is used for preparing the filling slurry, and meanwhile, a tail mortar concentration storage and measurement system (10), a coarse aggregate metering and feeding system (20), a cement metering and feeding system (30) and a thickening water metering and feeding system (40) respectively perform a circulating process step of metering and caching the filling materials; after the horizontal forced mixer completes preparation and discharging of the filling slurry in one period, a filling slurry discharging valve arranged at the bottom of the horizontal forced mixer is automatically closed through an automatic control system (60);
then, the automatic control system (60) respectively opens the discharge valves on the underflow metering buffer hopper (13), the coarse aggregate metering buffer hopper (23), the cement metering buffer hopper (33) and the thickening water metering buffer hopper (43), the filling material is automatically discharged into the horizontal forced mixer through the discharge valves, the horizontal forced mixer is used for carrying out the next period of mixing treatment, and the filling slurry is automatically discharged; under the regulation and control of an automatic control system (60), the metering buffer hoppers continuously and circularly measure and buffer the filling materials.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110550612.8A CN113202551A (en) | 2021-05-20 | 2021-05-20 | System and method for accurately preparing and filling coarse aggregate and tail mortar |
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| CN202110550612.8A CN113202551A (en) | 2021-05-20 | 2021-05-20 | System and method for accurately preparing and filling coarse aggregate and tail mortar |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114179227A (en) * | 2021-11-30 | 2022-03-15 | 湖南有色金属研究院有限责任公司 | Tailing grading, recombining and repulping cemented filling equipment and process thereof |
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2021
- 2021-05-20 CN CN202110550612.8A patent/CN113202551A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114179227A (en) * | 2021-11-30 | 2022-03-15 | 湖南有色金属研究院有限责任公司 | Tailing grading, recombining and repulping cemented filling equipment and process thereof |
| CN114179227B (en) * | 2021-11-30 | 2024-02-27 | 湖南有色金属研究院有限责任公司 | Tailing grading and reorganizing slurry reconstruction cemented filling equipment and technology thereof |
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