CN106914335A - Slag crushing screening technology - Google Patents
Slag crushing screening technology Download PDFInfo
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- CN106914335A CN106914335A CN201710190391.1A CN201710190391A CN106914335A CN 106914335 A CN106914335 A CN 106914335A CN 201710190391 A CN201710190391 A CN 201710190391A CN 106914335 A CN106914335 A CN 106914335A
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- Prior art keywords
- slag
- sieve
- magnetic
- gravity treatment
- broken
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B7/00—Combinations of wet processes or apparatus with other processes or apparatus, e.g. for dressing ores or garbage
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B9/00—General arrangement of separating plant, e.g. flow sheets
- B03B9/04—General arrangement of separating plant, e.g. flow sheets specially adapted for furnace residues, smeltings, or foundry slags
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- Manufacture And Refinement Of Metals (AREA)
Abstract
The present invention provides a kind of slag crushing screening technology, it includes watering efflorescence, primary dcreening operation, broken, grinding, magnetic separation and gravity treatment step, using common ore reduction and screening plant, preferable screening effect is reached so that the slag useful metal mass content after treatment is reduced to less than 1.5%.It has the advantages that low production cost, operating procedure are simple and screening efficiency is high.
Description
Technical field
The invention belongs to slag treatment screening field, specifically, a kind of broken screening work of stainless steel slag is relate to
Skill.
Background technology
In stainless steel smelting process, hybrid reaction is constantly carried out between molten steel and slag, often mixed in slag
Small molten steel drop.If these drops enter molten steel without enough time, will be with the cooling of slag, with slag solid
Mix under body state.Stainless steel-making factory can produce a large amount of slags, slag amount to account for the 23%w of steel output in steelmaking process.Through
Initial analysis is crossed, containing the about metallics of 5%w in slag, metallics is mainly Fe, Cr and Ni, and remaining major part is
Nonmetallic CaO and and SiO2.Firstly, because metallics is in itself the raw material of steel-making, there is value very high, when in slag
Useful metallics is mixed into, the waste of stainless steel cost is caused；Secondly as slag bulk component is mainly CaO and SiO2,
It being commonly used as the raw material of cement, and the metallic particles contained in slag, cement performance will be had a negative impact；Again, by
Contain heavy metal Cr and Ni in copper smelter slag, though most of slag is semiclosed storage, still suffer to the threat of environment because
Element；In addition, China's nickel resources are seriously poor, chromium resource is not enough, causes that early stage nickel valency suddenly rises, chromium valency constantly rises, and makes stainless steel
Production cost remain high.The metallics in stainless steel slag how is reclaimed, production cost is reduced and is reduced to environment
Pollution, is the great research topic of stainless steel-making factory.
In the slag treatment technology of carbon steel steelmaking factory, due to the relatively high magnetism of carbon steel, slag is generally used and is first crushed
The mode of magnetic separation is carried out afterwards.But, because the metallic particles magnetic in stainless steel slag is not strong, even without magnetic, only lean on
Cannot be sufficiently separated for metallics and slag body by the mode of magnetic separation.Number of patent application is 201310220422.5, entitled
A kind of patent of invention of slag Treatment technique for processing discloses primary dcreening operation, four magnetic separation, the technique of broken and rod milling and processes screening
Useful metal in slag, but the technique cannot the non magnetic slag of Effective selection, be not suitable for the sieve of stainless steel-making slag
Choosing.And the more magnetic separation step of the technique application, the material for filtering out repeatedly returns to magnetic separation, it is necessary to more magnetic plant and conveying
Equipment, complex operation, electricity expends larger, and production cost is high.
In order to solve the above problems, production cost is reduced, simplify operating procedure, we are seeking a kind of preferable skill always
Art solution.
The content of the invention
The purpose of the present invention is directed to the deficiencies in the prior art, so as to provide a kind of low production cost and steel simple to operate
Slag crushes screening technology.
1st, a kind of slag crushing screening technology, it comprises the following steps：A kind of slag crushing screening technology, it includes as follows
Step：（1）Watering efflorescence, is efflorescence slag, the Li Du≤1000mm of the efflorescence slag by the watering efflorescence of original slag；
（2）Primary dcreening operation, carries out the efflorescence slag primary dcreening operation and obtains sieving upper slag and the lower slag of sieve, and the sieve aperture of screen cloth is straight used by primary dcreening operation
Footpath is 300mm；
（2）It is broken, on the sieve slag through fragmentation cell it is broken after, obtain broken slag, the broken slag Zhi Jing≤
300mm；
（3）Grinding screening, the broken slag is ground screening and obtains sieving under abrasive and sieve into grinding sieve unit
Abrasive；
（4）Magnetic separation, abrasive filters out magnetic material and non magnetic material in magnetic separating unit by magnetic separation on the sieve, described non magnetic
Material enters gravity treatment；
（5）Gravity treatment, abrasive carries out the first heavy burder and the first light material that gravity treatment goes out in the first gravity treatment unit under the sieve, described non-
Magnetic material in the second gravity treatment unit screen and obtains the second heavy burder and the second light material, first heavy burder and second heavy burder
It is useful metal particle；
Wherein, the grinding sieve unit includes wet ball mill, and the wet ball mill has vibratory sieve, the vibratory sieve
Aperture is 3mm, and the first gravity treatment unit is jigging machine, and the second gravity treatment unit is shaking table.
Based on above-mentioned, the jigging machine is movable-sieve jig.
Based on above-mentioned, the magnetic separating unit is belt magnetic separator.
Based on above-mentioned, the belt magnetic separator is magnetic separator with adjustable magnetic field strength.
Based on above-mentioned, the disintegrating machine is simple pendular jaw crusher.
The present invention has prominent substantive distinguishing features progressive with significant compared with the prior art, specifically, of the invention
Watering efflorescence realizes the efflorescence of original slag using the property that CaO meets water reaction expansion, simple to operate, equipment and production cost
It is low, the dust of later pulverizing processes can also be reduced.Furtherly, the present invention uses wet according to material properties in grinding steps
Formula ball mill, improves the screening efficiency of operation magnetic separation below and gravity treatment.It has low production cost, operating procedure simple and sieve
Select the advantage of efficiency high.
Brief description of the drawings
Fig. 1 is process flow diagram of the invention.
Specific embodiment
Below by specific embodiment, technical scheme is described in further detail.
As shown in figure 1, a kind of slag crushing screening technology, comprises the following steps：（1）Watering efflorescence, original slag is spilt
Pigment turn to efflorescence slag, the grain degree≤1000mm of the efflorescence slag.
（2）Primary dcreening operation, carries out the efflorescence slag primary dcreening operation and obtains sieving upper slag and the lower slag of sieve, the sieve of screening screen cloth used
Bore dia is 300mm；
（2）It is broken, after slag is crushed into the fragmentation cell on the sieve, obtain broken slag, the broken slag diameter
≦300mm。
In broken, the disintegrating machine that our factory uses is simple pendular jaw crusher.Simple pendular jaw crusher compact conformation is simple,
The phenomenon of the rarer overcrushing of material, broken material epigranular, are easy to the crushing of the later pulverizing processes, and set during processing
It is standby to be difficult wear damage.
（3）Grinding screening, the broken slag is first ground to sieve again and obtains sieving grinding into grinding sieve unit
Material and the lower abrasive of sieve, wherein, the grinding sieve unit includes wet ball mill, and the wet ball mill has vibratory sieve,
The aperture of the vibratory sieve is 3mm.
Because the metal being mixed into slag occurs with particle shape, by artificial screening, the metallic particles in our factory's slag is big
It is small in 4mm or so, therefore use coarseness ore grinder.Slag bulk component is mainly CaO and SiO2, according to stove in broken material
The difference of slag and metallic particles compression strength, slag compression strength is smaller to be easier to be ground to powdered, and contains useful metal
Metallic particles compression strength is larger, and easy grinding is not in small, broken bits.The present invention uses wet ball mill in screening step is ground, most of
Slag by spherical grinder be ground to it is powdered swept away by water, will not be bonded on metallic particles, thus the upper abrasive of sieve contain compared with
Many bulky grain useful metals, and it is less to sieve lower abrasive useful metal particle.The wet type ball-type selected in the present invention grinds
Machine not only agrees with the property of slag, also greatly improves the screening efficiency of subsequent reselection.
Wherein, the wet ball mill is provided with vibratory sieve, and the sieve diameter of the vibratory sieve is 3mm, the vibratory sieve
It is the upper abrasive of sieve and the lower abrasive of sieve by abrasive screening.Wherein, the gravitational separation equipment for sieving lower abrasive is shaking table, shaking table
It is suitable for particle of the gravity treatment granularity in below 3mm, the sieve diameter of the vibratory sieve selects 3mm, that is, improves the screening of shaking table
Efficiency, and most of useful metal particle entrapment is carried out into lower one magnetic separating unit in abrasive on sieve, screening efficiency is high.
（4）Magnetic separation, abrasive filters out magnetic material and non magnetic material, institute in the magnetic separating unit by magnetic separation on the sieve
State non magnetic material into gravity treatment unit.
Abrasive magnetic separation on the sieve is magnetic material and non magnetic material, wherein most metal by magnetic separation step of the invention
Particle is screened out for magnetic material, and magnetic material composition can be directly used for steel-making close to the composition of stainless steel product.Non magnetic material enters
Enter next step gravity treatment operation.The magnetic separator 5 selected in specific implementation is belt magnetic separator, is both magnetic separator and conveyer,
Compact conformation, reduces equipment cost.What our factory selected is the adjustable belt magnetic separator of magnetic field intensity, controlling magnetic field strength range
It is 100mT-200mT, can be adjusted and process its stove according to technique in steelmaking process and the difference of product during specific magnetic separation
The magnetic field intensity of the magnetic separator of slag, it is applied widely, the rate of recovery is improved, reduce production cost.
（5）Gravity treatment, abrasive carries out the first heavy burder and the first light material that gravity treatment goes out, institute in the first gravity treatment unit under the sieve
State non magnetic powdery slag and in the second gravity treatment unit screen and obtain the second heavy burder and the second light material, first heavy burder and institute
The second heavy burder is stated for useful metal particle.
In the gravity treatment step, the first gravity treatment unit that our factory selects is jigging machine, the second gravity treatment unit
It is shaking table.By after the non-magnetic material gravity treatment, heavy metallic particles is the first heavy burder in lower floor to the jigging machine,
The small slag of proportion is the first light material on upper strata, and the first heavy burder therein is reclaimed materials, is also referred to as grinding iron in our factory, wherein grinding
Mill iron accounts for the 10% of magnetic material quality, increases non magnetic material gravity treatment step, can greatly improve the yield of useful metal.In tool
During body is implemented, the jigging machine that our factory uses is movable-sieve jig, and movable-sieve jig can make by reciprocating sieve
Material on compass screen surface is layered, therefore does not need excessive hydraulic pressure and current, saves water resource, reduces production cost.
Shaking table utilizes the effect of the shake of machinery and the flushing of current, by little particle metal and little particle slag difference in specific gravity
It is different to realize that metal and slag are separated.Abrasive gravity treatment under the sieve is gone out the second heavy burder and the second light material by the shaking table, therein
Second heavy burder is little particle useful metal, and shaking table iron is referred to as in our factory.
Hot original slag Li Du≤1000mm after efflorescence of sprinkling water, the sieve aperture of screen cloth 2 is straight described in specific implementation
Footpath is 300mm, and after the slag separating twice more than 300mm is crushed through the simple pendular jaw crusher, granularity is further decreased to
300mm or so, three crushing grain degree≤10mm after the grinding of the wet type spherical grinder.By the sieve of the vibratory sieve
Point, abrasive carries out magnetic separation into the belt magnetic separator on the sieve of Li Du≤3mm, magneticly elects magnetic material, and non magnetic material passes through
Jigging machine gravity treatment goes out to grind iron；Abrasive enters the gravity treatment of shaking table 8 under sieve of the granularity less than 3mm, and gravity treatment goes out shaking table iron.
4 treatment screenings are carried out to the copper smelter slag of 304 series stainless steels of our factory using screening technique of the invention, should
The metal in slag after screening is analyzed with xrf analysis instrument：Cr2O3Mass fraction with Ni is averagely reduced to respectively
1.22% and 0.217%, the mass content summation of the stove metal in the dreg after screening is less than 1.5%, reaches expected screening target, such as
Shown in table 1.
Table 1.
| For the first time | Second | For the third time | 4th time | Averagely | |
| 1.52 | 1.61 | 0.83 | 0.92 | 1.22 | |
| Ni% | 0.3 | 0.38 | 0.06 | 0.13 | 0.217 |
Using GB/T 223.23 --- 1994《Steel and alloy analysis method dimethylglyoxime spectrophotometry nickel
Amount》With GB/T 223.12 --- 1991《Steel and the hydrazine Spectrophotometry for Determination of alloy analysis method sodium carbonate separation-dibenzoyl two
Determine chromium》To filter out slag composition of steel is analyzed：Grinding iron：Cr=17.0%-17.3%, Ni=7%-7.2%；Shaking table iron：Cr=
17.0%-17.3%, Ni=6.0%-6.1%, close to the content of product, as shown in table 2.
Table 2.
The present invention is screened using the most frequently used ore screening equipment to slag, can reach preferable screening effect, will not
Useful metal content is down to about 1.5% from about 5% in rust steel stove slag, reaches target, and equipment cost is relatively low, reduces environment dirty
Dye, reduces production cost.
Finally it should be noted that:The above embodiments are merely illustrative of the technical solutions of the present invention rather than its limitations；To the greatest extent
Pipe has been described in detail with reference to preferred embodiment to the present invention, and those of ordinary skill in the art should be understood：Still
Specific embodiment of the invention can be modified or equivalent is carried out to some technical characteristics；Without deviating from this hair
The spirit of bright technical scheme, it all should cover in the middle of claimed technical scheme scope of the invention.
Claims (5)
1. a kind of slag crushing screening technology, it comprises the following steps：（1）Watering efflorescence, is powder by the watering efflorescence of original slag
Change slag, the Li Du≤1000mm of the efflorescence slag；
（2）Primary dcreening operation, carries out the efflorescence slag primary dcreening operation and obtains sieving upper slag and the lower slag of sieve, and the sieve aperture of screen cloth is straight used by primary dcreening operation
Footpath is 300mm；
（2）It is broken, on the sieve slag through fragmentation cell it is broken after, obtain broken slag, the broken slag Zhi Jing≤
300mm；
（3）Grinding screening, the broken slag is ground screening and obtains sieving under abrasive and sieve into grinding sieve unit
Abrasive；
（4）Magnetic separation, abrasive filters out magnetic material and non magnetic material in magnetic separating unit by magnetic separation on the sieve, described non magnetic
Material enters gravity treatment；
（5）Gravity treatment, abrasive carries out the first heavy burder and the first light material that gravity treatment goes out in the first gravity treatment unit under the sieve, described non-
Magnetic material in the second gravity treatment unit screen and obtains the second heavy burder and the second light material, first heavy burder and second heavy burder
It is useful metal particle；
Wherein, the grinding sieve unit includes wet ball mill, and the wet ball mill has vibratory sieve, the vibratory sieve
Aperture is 3mm, and the first gravity treatment unit is jigging machine, and the second gravity treatment unit is shaking table.
2. slag crushing screening technology according to claim 1, it is characterised in that：The jigging machine is movable-sieve jig.
3. slag crushing screening technology according to claim 1 and 2, it is characterised in that：The magnetic separating unit is belt magnetic
Select machine.
4. slag crushing screening technology according to claim 3, it is characterised in that：The belt magnetic separator is magnetic field intensity
Adjustable magnetic separator.
5. slag crushing screening technology according to claim 1 and 2, it is characterised in that：The disintegrating machine is letter pendulum jaw
Disintegrating machine.
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| CN201710190391.1A CN106914335A (en) | 2017-03-28 | 2017-03-28 | Slag crushing screening technology |
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|---|---|---|---|
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Cited By (10)
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|---|---|---|---|---|
| CN108187880A (en) * | 2018-01-15 | 2018-06-22 | 南京芬钢环保科技有限公司 | A kind of slag advanced treatment process |
| CN109675907A (en) * | 2018-12-26 | 2019-04-26 | 贵州博宏实业有限责任公司 | A kind of blast furnace metallurgical solid waste comprehensive management of technology |
| CN109776720A (en) * | 2017-11-13 | 2019-05-21 | 济南华迪工贸有限公司 | A kind of preparation method of the polyacrylic acid large-particle size bead-like water-absorbent resin of crosslinking |
| CN110180640A (en) * | 2019-06-10 | 2019-08-30 | 成渝钒钛科技有限公司 | A kind of storehouse abrasion process method in mitigation rod mill load and rod mill |
| CN110216009A (en) * | 2019-06-18 | 2019-09-10 | 周涛 | A kind of dressing method of steel slag |
| CN110292979A (en) * | 2019-06-20 | 2019-10-01 | 四川省兴威钒业有限公司 | A kind of steel slag production line proposes production method |
| CN111659702A (en) * | 2020-06-15 | 2020-09-15 | 遵义永航再生资源利用有限公司 | Method for recycling and reprocessing scrap steel |
| CN112007752A (en) * | 2020-08-17 | 2020-12-01 | 广西冶固科技发展有限公司 | Stainless steel refining furnace tailing gradient recycling sorting method and system |
| CN113121129A (en) * | 2021-03-30 | 2021-07-16 | 内蒙古金辉稀矿股份有限公司 | Comprehensive utilization method of steel slag |
| CN114471937A (en) * | 2022-02-23 | 2022-05-13 | 昆明学院 | Method for comprehensively recovering iron-manganese minerals from silicon-manganese alloy smelting water-quenched slag |
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| CN109776720A (en) * | 2017-11-13 | 2019-05-21 | 济南华迪工贸有限公司 | A kind of preparation method of the polyacrylic acid large-particle size bead-like water-absorbent resin of crosslinking |
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| CN108187880B (en) * | 2018-01-15 | 2018-10-23 | 南京芬钢环保科技有限公司 | A kind of slag advanced treatment process |
| CN109675907A (en) * | 2018-12-26 | 2019-04-26 | 贵州博宏实业有限责任公司 | A kind of blast furnace metallurgical solid waste comprehensive management of technology |
| CN110180640A (en) * | 2019-06-10 | 2019-08-30 | 成渝钒钛科技有限公司 | A kind of storehouse abrasion process method in mitigation rod mill load and rod mill |
| CN110216009B (en) * | 2019-06-18 | 2021-01-29 | 周涛 | Method for sorting steel slag |
| CN110216009A (en) * | 2019-06-18 | 2019-09-10 | 周涛 | A kind of dressing method of steel slag |
| CN110292979A (en) * | 2019-06-20 | 2019-10-01 | 四川省兴威钒业有限公司 | A kind of steel slag production line proposes production method |
| CN111659702A (en) * | 2020-06-15 | 2020-09-15 | 遵义永航再生资源利用有限公司 | Method for recycling and reprocessing scrap steel |
| CN112007752A (en) * | 2020-08-17 | 2020-12-01 | 广西冶固科技发展有限公司 | Stainless steel refining furnace tailing gradient recycling sorting method and system |
| CN112007752B (en) * | 2020-08-17 | 2023-11-28 | 广西冶固科技发展有限公司 | Method and system for echelon recycling separation of stainless steel refining furnace tailings |
| CN113121129A (en) * | 2021-03-30 | 2021-07-16 | 内蒙古金辉稀矿股份有限公司 | Comprehensive utilization method of steel slag |
| CN113121129B (en) * | 2021-03-30 | 2022-02-08 | 内蒙古金辉稀矿股份有限公司 | Comprehensive utilization method of steel slag |
| CN114471937A (en) * | 2022-02-23 | 2022-05-13 | 昆明学院 | Method for comprehensively recovering iron-manganese minerals from silicon-manganese alloy smelting water-quenched slag |
| CN114471937B (en) * | 2022-02-23 | 2023-04-07 | 昆明学院 | Method for comprehensively recovering iron-manganese minerals from silicon-manganese alloy smelting water-quenched slag |
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