CN104384020A - Depth-induced crushing mineral separation technology of super-lean magnetic iron ore - Google Patents
Depth-induced crushing mineral separation technology of super-lean magnetic iron ore Download PDFInfo
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Abstract
The invention relates to a depth-induced crushing mineral separation technology of super-lean magnetic iron ore, which is applied to the technical field of mineral separation of super-lean magnetic iron ore. The technology comprises the following steps: after coarsely crushing and intermediately crushing the super-lean magnetic iron ore by adopting a gyratory crusher and a cone crusher respectively, performing one-stage magnetic-pulley dry discarding pre-separation, performing two-stage magnetic-pulley dry discarding on tailings, and finely crushing the fine ore through a hammer crusher; sieving the finely crushed product, returning the fine ore for fine crushing operation, and sieving the tailings to serve as a gravel aggregate product; performing dry separation on ore concentrate, milling ores by adopting a ball mill, and performing once coarse separation, twice fine separation, once concentration and once filtration to obtain dry ore concentrate; performing selective grinding on the tailings, concentrating by a concentrator, filtering through a filter, and performing dry heaping on the filtered tailings and the tailings from the dry separator. According to the super-lean magnetic iron ore which contains about 5% of magnetic iron, the tailings after dry discarding are sieved to serve as the gravel aggregate product for depth-induced crushing, the feeding amount is reduced, the mineral separation cost is reduced, and the economic benefits are obviously improved.
Description
Technical field
The present invention relates to a kind of Ultra-low-grade magnetite stone depth crushing ore-dressing technique in Ultra-low-grade magnetite stone technical field of beneficiation.
Background technology
Iron ore is the most important basic material of steel and iron industry.Along with the fast development of national economy, the demand of China to iron ore resource sharply strengthens.The iron ore of domestic easy choosing simultaneously reduces day by day, and announce according to Ministry of Land and Resources, within 2010, iron ore deposit reserves 726.99 hundred million tons are found out in the whole nation, wherein: reserves 7,900,000,000 tons, basic unit price 222.32 hundred million tons, stock number 504.67 hundred million tons, major part is lean ore, and rich ore only has 9.27 hundred million tons, accounts for 1.2%.Develop domestic Ultra-low-grade magnetite and become the effective ways solving domestic iron ore concentrate breach.At present, the problem that in the ore dressing process of Ultra-low-grade magnetite stone, ubiquity has 3 points: 1, process raw ore amount large.Because raw ore Armco magnetic iron grade is low, therefore ratio of concentration is high, causes the day output of Ultra-low-grade magnetite substantially more than ton; 2, Iron concentrate output is few.Because ratio of concentration is low, cause the product yield of Ultra-low-grade magnetite mineral processing production line few, this also makes the economic benefit of Ultra-low-grade magnetite mineral processing production line can not be guaranteed; 3, the mine tailing amount produced in producing is very big.And tailings glass gets up very difficult.Comprehensive above 3 common reasons, cause Ultra-low-grade magnetite beneficiation cost high and environmental pollution is large, and economic benefit is difficult to improve.Therefore, the beneficiation method developing a kind of Ultra-low-grade magnetite stone high-efficiency environment friendly is extremely urgent.The depth crushing ore-dressing technique of this method introduction provides effective method for addressing this problem.
Summary of the invention
The object of the present invention is to provide a kind of Ultra-low-grade magnetite stone depth crushing ore-dressing technique, to solve in Ultra-low-grade magnetite stone ore-dressing technique, raw ore ore grinding treating capacity is large, the a large amount of mine tailing stone processing costs produced are high, the problem that ore dressing economic benefit is low, realize the comprehensive utilization of Ultra-low-grade magnetite stone, Ultra-low-grade magnetite stone is through depth crushing, dry throwing preliminary election, obtains qualified concentrate containing stone in advance, improves ore dressing stone benefit.
The object of the present invention is achieved like this: a kind of Ultra-low-grade magnetite stone depth crushing ore-dressing technique, and described technique concrete steps are as follows:
(1) Ultra-low-grade magnetite stone is adopted gyratory crusher and gyratory crusher carry out coarse crushing and in broken after, carry out that one section of magnetic pulley is dry throws preliminary election, mine tailing stone enters two sections and dryly throws magnetic pulleys, and refined ore enters hammer mill and carries out operation in small, broken bits;
(2) product in small, broken bits is through screening, > 3mm enters two sections of magnetic pulley dry separation in the lump with one section of preliminary rejection stone, refined ore returns and enters operation in small, broken bits, mine tailing stone enters screening, granularity is divided into 0-5mm, 5-10mm, 10-26.5mm, > 26.5mm tetra-grades, can be used as sandstone aggregate product; < 3mm ore enters dry-dressing machine dry separation, and energy jettisoning 70% mine tailing, greatly reduces ore grinding treating capacity;
(3) dry separation concentrate adopts grinding of ball grinder ore, and being milled to fineness is that-200 orders account for the breeze of 80% and make ore pulp, and through one roughing, twice selected, obtains dry refined ore after once concentration and once filtration;
(4) mill selects mine tailing to concentrate through thickener, after filter filters, piles with dry-dressing machine mine tailing is dry in the lump;
In described step (1), the concentrate of dry throwing preliminary election is sent in hammer mill, and in step (2), the product of hammer mill feeding vibratory sieve is sieved, the ore being less than 3mm is sent into dry-dressing machine, the ore that will be greater than 3mm through two sections of magnetic pulleys are dry throw preliminary election after, then concentrate is turned back to hammer mill and carries out operation in small, broken bits.
Main points of the present invention are its structure and working principle.Its operation principle is, for Armco magnetic iron content about 5% Ultra-low-grade magnetite ore, depth crushing is carried out to raw ore, through selecting the dry throwing of stage crushing stage, dry mine tailing of throwing is used as the fragmentation of aggregate product depth through screening, < 3mm is through the dry throwing of dry-dressing machine, the lower mineral of sieve enter mill choosing again, obtain concentrate, multistage dry throwing preliminary election is carried out in advance in shattering process, by part dry separation mine tailing by grading, be used as crushed stone aggregate to sell, greatly reduce into mill amount, save beneficiation cost, obtain the Ultra-low-grade magnetite Comprehensive recycle technology of two kinds of products, economic benefit is made to obtain significant raising.The comprehensive utilization process flow process that this ore-dressing technique adopts " the stage crushing stage is dry throw mine tailing classification do aggregate---dry concentrate of throwing selects to obtain iron ore concentrate through mill ".The indices of product is qualified, and obtains two kinds of products.
A kind of Ultra-low-grade magnetite stone depth crushing ore-dressing technique compared with prior art, having Armco magnetic iron content is the Ultra-low-grade magnetite of about 5%, through selecting the dry throwing of stage crushing stage, dry mine tailing of throwing is used as the fragmentation of aggregate product depth through screening, < 3mm is through the dry throwing of dry-dressing machine, greatly reduce into mill amount, save beneficiation cost, realize Ultra-low-grade magnetite comprehensive reutilization to greatest extent, make the advantages such as economic benefit is significantly improved, will be widely used in Ultra-low-grade magnetite stone technical field of beneficiation.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the present invention is described in detail.
Fig. 1 is process chart of the present invention.
Detailed description of the invention
With reference to accompanying drawing, a kind of Ultra-low-grade magnetite stone depth crushing ore-dressing technique, described technique concrete steps are as follows:
(1) Ultra-low-grade magnetite stone is adopted gyratory crusher and gyratory crusher carry out coarse crushing and in broken after, carry out that one section of magnetic pulley is dry throws preliminary election, mine tailing stone enters two sections and dryly throws magnetic pulleys, and refined ore enters hammer mill and carries out operation in small, broken bits;
(2) product in small, broken bits is through screening, > 3mm enters two sections of magnetic pulley dry separation in the lump with one section of preliminary rejection stone, refined ore returns and enters operation in small, broken bits, mine tailing stone enters screening, granularity is divided into 0-5mm, 5-10mm, 10-26.5mm, > 26.5mm tetra-grades, can be used as sandstone aggregate product; < 3mm ore enters dry-dressing machine dry separation, and energy jettisoning 70% mine tailing, greatly reduces ore grinding treating capacity;
(3) dry separation concentrate adopts grinding of ball grinder ore, and being milled to fineness is that-200 orders account for the breeze of 80% and make ore pulp, and through one roughing, twice selected, obtains dry refined ore after once concentration and once filtration;
(4) mill selects mine tailing to concentrate through thickener, after filter filters, piles with dry-dressing machine mine tailing is dry in the lump;
In described step (1), the concentrate of dry throwing preliminary election is sent in hammer mill, and in step (2), the product of hammer mill feeding vibratory sieve is sieved, the ore being less than 3mm is sent into dry-dressing machine, the ore that will be greater than 3mm through two sections of magnetic pulleys are dry throw preliminary election after, then concentrate is turned back to hammer mill and carries out operation in small, broken bits.
Embodiment one
1, adopt PXZ-1417 gyratory crusher and PYT-B2235 gyratory crusher to carry out fragmentation in above-mentioned ore, carry out preliminary election with two sections of CT-1014 type magnetic druies afterwards.Pre-concentrate selection feeds 8 PC-M1825 hammer mills and carries out operation in small, broken bits.
2, product in small, broken bits is through screening, and > 3mm enters two sections of magnetic pulley dry separation in the lump with one section of pre-separation using magnetic pulley mine tailing, and concentrate returns operation in small, broken bits.Mine tailing stone enters screening, granularity is divided into 0-5mm, 5-10mm, 10-26.5mm, > 26.5mm tetra-grades, can be used as sandstone aggregate product.The ore of < 3mm enters the dry separation of CTG-1030 dry-dressing machine, and the mine tailing of jettisoning about 70% effectively reduces ore grinding amount;
3, dry separation concentrate feeds MQG3660 ball mill, ore milling product enters one roughing magnetic separator, mine tailing enters Tailings System, concentrate squeezes into cyclone by pump, dusting cover is entered in cyclone overflow, oversize and cyclone underflow enter MC3660 bis-sections of ball mills in the lump after concentrated magnetic separator concentrating, and ball mill product enters secondary magnetic rougher again, and concentrate returns cyclone by pump again.The selected magnetic separator of product introduction under dusting cover sieve, concentrate enters selected two magnetic separators, and final concentrate sends to concentrate stockyard by belt after disk filter filters.
4, mill selects comprehensive mine tailing to concentrate through NZY-45 type thickener, after XPG-200 filter filters, piles with dry-dressing machine mine tailing is dry in the lump.
Obviously, above-mentioned implementation example of the present invention is only for example of the present invention is clearly described, and is not the restriction to embodiments of the present invention.For affiliated those of ordinary skill in the related art, other multi-form change and variation can also be made on the basis of the above description.Here cannot all implementation methods be illustrated.Every belong to technical scheme of the present invention the apparent change of amplifying out or the row being still in protection scope of the present invention.
Claims (2)
1. a Ultra-low-grade magnetite stone depth crushing ore-dressing technique, is characterized in that: described technique concrete steps are as follows:
(1) Ultra-low-grade magnetite stone is adopted gyratory crusher and gyratory crusher carry out coarse crushing and in broken after, carry out that one section of magnetic pulley is dry throws preliminary election, mine tailing stone enters two sections and dryly throws magnetic pulleys, and refined ore enters hammer mill and carries out operation in small, broken bits;
(2) product in small, broken bits is through screening, > 3mm enters two sections of magnetic pulley dry separation in the lump with one section of preliminary rejection stone, refined ore returns and enters operation in small, broken bits, mine tailing stone enters screening, granularity is divided into 0-5mm, 5-10mm, 10-26.5mm, > 26.5mm tetra-grades, can be used as sandstone aggregate product; < 3mm ore enters dry-dressing machine dry separation, and energy jettisoning 70% mine tailing, greatly reduces ore grinding treating capacity;
(3) dry separation concentrate adopts grinding of ball grinder ore, and being milled to fineness is that-200 orders account for the breeze of 80% and make ore pulp, and through one roughing, twice selected, obtains dry refined ore after once concentration and once filtration;
(4) mill selects mine tailing to concentrate through thickener, after filter filters, piles with dry-dressing machine mine tailing is dry in the lump.
2. a kind of Ultra-low-grade magnetite stone depth crushing ore-dressing technique according to claim 1, it is characterized in that: in described step (1), the concentrate of dry throwing preliminary election is sent in hammer mill, and in step (2), the product of hammer mill feeding vibratory sieve is sieved, the ore being less than 3mm is sent into dry-dressing machine, the ore that will be greater than 3mm through two sections of magnetic pulleys are dry throw preliminary election after, then concentrate is turned back to hammer mill and carries out operation in small, broken bits.
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105032597A (en) * | 2015-05-13 | 2015-11-11 | 河源旗滨硅业有限公司 | Multi-stage separation sand machining production line |
| CN105498949A (en) * | 2016-01-05 | 2016-04-20 | 马钢(集团)控股有限公司 | Lean magnetite mining-dressing integrated pre-concentrating process and device |
| CN105944824A (en) * | 2016-05-20 | 2016-09-21 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Dry pre-concentration process for weakly magnetic iron ore by size grading |
| CN107309080A (en) * | 2017-06-08 | 2017-11-03 | 陕西冶金设计研究院有限公司 | A kind of super low-grade primary magnetic iron ore comprehensive development and utilization method |
| CN107744881A (en) * | 2017-11-13 | 2018-03-02 | 承德天宝矿业集团有限公司 | Ore-sorting system and method for Ultra-low-grade magnetite |
| CN109482338A (en) * | 2018-12-21 | 2019-03-19 | 马钢集团矿业有限公司 | A kind of beneficiation method of the narrow gradation of magnetic iron ore, the independent ore grinding of chats |
| CN109746104A (en) * | 2019-02-11 | 2019-05-14 | 鞍钢集团矿业有限公司 | A kind of magnetic iron ore is broken-pre-selection-grinding process |
| CN112295722A (en) * | 2020-08-18 | 2021-02-02 | 安徽金安矿业有限公司 | Differentiated production method of high-quality magnetite concentrate |
| CN113333152A (en) * | 2021-06-03 | 2021-09-03 | 中冶北方（大连）工程技术有限公司 | Mineral separation pre-selection process for comprehensively utilizing barren rock of ultra-lean iron ore tailings |
| CN115069552A (en) * | 2022-05-18 | 2022-09-20 | 攀枝花仁江矿业有限公司 | Method for recycling ores by rock discharge and waste disposal of vanadium titano-magnetite |
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| CN105032597A (en) * | 2015-05-13 | 2015-11-11 | 河源旗滨硅业有限公司 | Multi-stage separation sand machining production line |
| CN105032597B (en) * | 2015-05-13 | 2017-11-24 | 河源旗滨硅业有限公司 | Multipass sort sand machining production line |
| CN105498949A (en) * | 2016-01-05 | 2016-04-20 | 马钢(集团)控股有限公司 | Lean magnetite mining-dressing integrated pre-concentrating process and device |
| CN105944824A (en) * | 2016-05-20 | 2016-09-21 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Dry pre-concentration process for weakly magnetic iron ore by size grading |
| CN105944824B (en) * | 2016-05-20 | 2018-08-31 | 甘肃酒钢集团宏兴钢铁股份有限公司 | A kind of weak-magnetic iron ore dry classification pre-selection technique |
| CN107309080A (en) * | 2017-06-08 | 2017-11-03 | 陕西冶金设计研究院有限公司 | A kind of super low-grade primary magnetic iron ore comprehensive development and utilization method |
| CN107744881A (en) * | 2017-11-13 | 2018-03-02 | 承德天宝矿业集团有限公司 | Ore-sorting system and method for Ultra-low-grade magnetite |
| CN109482338A (en) * | 2018-12-21 | 2019-03-19 | 马钢集团矿业有限公司 | A kind of beneficiation method of the narrow gradation of magnetic iron ore, the independent ore grinding of chats |
| CN109746104A (en) * | 2019-02-11 | 2019-05-14 | 鞍钢集团矿业有限公司 | A kind of magnetic iron ore is broken-pre-selection-grinding process |
| CN112295722A (en) * | 2020-08-18 | 2021-02-02 | 安徽金安矿业有限公司 | Differentiated production method of high-quality magnetite concentrate |
| CN113333152A (en) * | 2021-06-03 | 2021-09-03 | 中冶北方（大连）工程技术有限公司 | Mineral separation pre-selection process for comprehensively utilizing barren rock of ultra-lean iron ore tailings |
| CN115069552A (en) * | 2022-05-18 | 2022-09-20 | 攀枝花仁江矿业有限公司 | Method for recycling ores by rock discharge and waste disposal of vanadium titano-magnetite |
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