CN102230070B - Novel three-stage pre-dressing and crushing process for low-grade magnetite - Google Patents
Novel three-stage pre-dressing and crushing process for low-grade magnetite Download PDFInfo
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- CN102230070B CN102230070B CN 201010187249 CN201010187249A CN102230070B CN 102230070 B CN102230070 B CN 102230070B CN 201010187249 CN201010187249 CN 201010187249 CN 201010187249 A CN201010187249 A CN 201010187249A CN 102230070 B CN102230070 B CN 102230070B
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Abstract
The invention belongs to the technical field of ore dressing in metallurgy and mining industry, in particular relates to a three-stage pre-dressing and crushing process for low-grade magnetite. The process comprises the following steps of: feeding magnetite into a coarse crushing machine, transferring the material discharged from the coarse crushing machine to a first-stage dry-type magnetic pulley by using a rubber belt machine, delivering first-stage ore concentrate products to a middle crushing machine by using the rubber belt machine via a middle crushing machine ore bin, delivering middle crushing machine products to a second-stage magnetic pulley by using the rubber belt machine, screening ore concentrate products by a sieving machine to obtain on-sieve products and under-sieve products, crushing the on-sieve products by a fine crushing machine and mixing the crushed on-sieve products with the products crushed by the middle crushing machine, and then transferring the mixedcrushed products to the sieving machine, delivering the under-sieve products to a third-stage dry-type magnetic separation machine by a belt conveyer, wherein ore concentrates discharged from the from the third-stage dry-type magnetic separation machine are taken as the crushed final products, and waste stone from the magnetic separation machine is stored in a waste stone bin. According to the invention, the dry-type magnetic pulley operation is performed after the coarse crushing operation and the dry-type magnetic separation machine operation is performed after the fine crushing operation, the tailing rejection is performed in advance, therefore the milling grade can be improved and the ore grinding load can be reduced, and further, the purposes of reducing the energy consumption and increasing the economic benefits of ore dressing plants can be achieved.
Description
Technical field
The invention belongs to the technique of preparing field in the metallurgical mining industry, particularly relate to three sections preliminary election crushing process of a kind of low-grade magnetite.
Background technology
In recent years along with the mine to deep mining, the orebody mining condition runs down, rock intercalation increases, the ore output grade descends.Since the rock of sneaking in a large number through broken, sort, the last person causes dressing expenses to increase, and rock easy argillization in grinding process, the raising of restriction iron concentrate grade.If low to grade, the mixed large ore of rock is given up, will cause that the rate of extraction is low, stripping ratio large, cost up, the wasting of resources, and can not satisfy the dressing-works to the demand of ore amount for the ore deposit ability.Therefore in order before ore grinding, to reject abandoned mine, improve and enter to grind grade, realize the energy-saving and cost-reducing of dressing-works, reduce beneficiation cost, adopt dry type pre-separation using magnetic pulley technique that magnetite is realized throwing in advance tail, this technique be thick broken in crushing operation or in add the dry type magnetic pulley after broken, realizes three section one closed circuit one technical process of throwing tail or two throwing tails.
The granularity of crushed product is 12～0mm.This kind crushing process still can't satisfy the ore grinding Beneficiation Feed Grade for the lower magnetic ore deposit of head grade.Cause the qualified gangue of an ore part after the thin broken to enter ore grinding, increase dressing expenses and use.
Summary of the invention
The purpose of this invention is to provide three sections preliminary election crushing process of a kind of low-grade magnetite, reject to greatest extent barren rock before ore grinding, raising enters to grind grade, realizes the energy-saving and cost-reducing of dressing-works, reduces beneficiation cost.
The objective of the invention is to realize by following technical proposals:
Three sections preliminary election crushing process of low-grade magnetite of the present invention is characterized in that comprising following processing step:
1) granularity that ships of stope is that the iron ore of 1000mm is sent into coarse breaking and is subjected to ore storage bin,
2) be subjected to the ore in the ore storage bin to feed one section primary crusher through the bar screen feeder,
3) send into one section dry separation magnetic pulley through the ore of one section primary crusher fragmentation,
4) mine tailing selected of one section dry separation magnetic pulley is sent to behind the refuse bin with the automobile outward transport,
5) granularity selected of one section dry separation magnetic pulley be the concentrate of 250-300mm send into send into behind the broken ore storage bin in two sections in two sections crusher carry out in two sections broken,
6) ore of crusher in crushing is sent to dummy car by conveyor in two sections, and dummy car is sent two sections in this ore into the dry separation magnetic pulley and carried out two stages of magnetic separation,
7) mine tailing selected of two sections dry separation magnetic pulleys is sent to behind the refuse bin with the automobile outward transport,
8) concentrate selected of two sections dry separation magnetic pulleys is sent into the vibratory screening apparatus ore storage bin by sending into vibratory screening apparatus to the ore deposit conveyor,
9) the vibratory screening apparatus oversize is sent into three sections type fine disintegrating machines after sending into the fine crushing ore storage bin, and being crushed to granularity is to return vibratory screening apparatus behind 75-100mm,
10) through-screen size of vibratory screening apparatus is that 12-0mm sends into dry-type magnetic separator for ore fine,
11) the dry-type magnetic separator for ore fine mine tailing is transported outward with automobile after sending into refuse bin,
12) concentrate selected of dry-type magnetic separator for ore fine is sent into power house.Described one section primary crusher is the PE900X1200 jaw crusher.
Described dry separation magnetic pulley is dry separation CTDG1212 magnetic pulley.
Described two sections secondary crushers are the HP400 cone crusher.
Described vibratory screening apparatus is the 2YA2460 vibratory screening apparatus.
Described dry-type magnetic separator for ore fine is the CTL1030 dry-type magnetic separator for ore fine.
Two sections preliminary election crushing process of low-grade magnetite of the present invention are a kind of three section one closed circuit three sections tailings discarding by preconcentration crushing process, magnetite is sent into primary mill, ore carries out fragmentation in crusher chamber, the primary mill discharge advances one section dry type magnetic pulley through conveyor drive, sub-elect one section concentrate product and barren rock, one section concentrate product is by broken machine during broken machine ore storage bin advances in the conveyor drive warp, middle crusher product advances two sections dry type magnetic pulleys through conveyor drive, sub-elect two sections concentrate products and barren rock, the concentrate product is divided into sieve upward and sieves lower two products through sieve apparatus, oversize behind the thin broken crusher machine with in product behind the broken crusher machine merge laggard sieve apparatus, screen undersize feeds three sections dry-type magnetic extractors through conveyor, the concentrate of three sections dry-type magnetic extractors is as the finished product of fragmentation, and the barren rock of magnetic separator advances refuse bin.
Broken design cycle of the present invention is: three sections tailings discarding by preconcentration, three section one closed circuit flow process.Thick, in establish the dry type magnetic separation machine operation after establishing the operation of dry separation magnetic pulley, thin broken after broken and throw in advance tail, can improve into the mill grade, reduce and enter the ore grinding amount, reach energy-saving and cost-reducing, improve the purpose of selecting factory's economic benefit.
Description of drawings
Fig. 1 is process flow sheet of the present invention.
Embodiment
Describe the specific embodiment of the present invention in detail below in conjunction with embodiment.
According to three sections preliminary election crushing process of low-grade magnetite of the present invention, it is characterized in that comprising following processing step:
1) granularity that ships of stope is that the iron ore 12 of 1000mm is sent into coarse breaking and is subjected to ore storage bin,
2) be subjected to the ore in the ore storage bin to feed one section primary crusher 1 through the bar screen feeder,
3) send into one section dry separation magnetic pulley 2 through the ore of one section primary crusher fragmentation,
4) mine tailing 8 selected of one section dry separation magnetic pulley 2 is sent to behind the refuse bin with the automobile outward transport,
5) granularity selected of one section dry separation magnetic pulley 2 be the concentrate of 250-300mm send into send into behind the broken ore storage bin in two sections in two sections crusher 3 carry out in two sections broken,
6) ore of crusher 3 fragmentations is sent to dummy car by conveyor in two sections, and dummy car is sent this ore into two sections dry separation magnetic pulleys 4 and carried out two stages of magnetic separation,
7) barren rock 9 selected of two sections dry separation magnetic pulleys 4 is sent to behind the refuse bin with the automobile outward transport,
8) concentrate selected of two sections dry separation magnetic pulleys 4 is sent into the vibratory screening apparatus ore storage bin by sending into vibratory screening apparatus 5 to the ore deposit conveyor,
9) oversize of vibratory screening apparatus 5 is sent into three sections fine crushers 6 after sending into the fine crushing ore storage bin, and being crushed to granularity is to return vibratory screening apparatus behind 75-100mm,
10) through-screen size of vibratory screening apparatus 5 is that 12-0mm sends into dry-type magnetic separator for ore fine 7,
11) barren rock 10 of dry-type magnetic separator for ore fine 7 is transported outward with automobile after sending into refuse bin,
12) concentrate 11 selected of dry-type magnetic separator for ore fine is sent into power house.
Embodiment
Described one section primary crusher is the PE900X1200 jaw crusher.
Described dry separation magnetic pulley is dry separation CTDG1212 magnetic pulley.
Described two sections secondary crushers are HP400 cone crusher 3
Described vibratory screening apparatus 5 is the 2YA2460 vibratory screening apparatus.
Described dry-type magnetic separator for ore fine 7 is the CTL1030 dry-type magnetic separator for ore fine.
The present invention throws in advance tail and can improve into the mill grade, reduce the ore grinding amount, reaches energy-saving and cost-reducing, improves the purpose of selecting factory's economic benefit.
Claims (6)
1. three sections preliminary election crushing process of a low-grade magnetite is characterized in that comprising following processing step:
1) granularity that ships of stope is that the iron ore of 1000mm is sent into coarse breaking and is subjected to ore storage bin,
2) be subjected to the ore in the ore storage bin to feed one section primary crusher through the bar screen feeder,
3) send into one section dry separation magnetic pulley through the ore of one section primary crusher fragmentation,
4) mine tailing selected of one section dry separation magnetic pulley is sent to behind the refuse bin with the automobile outward transport,
5) granularity selected of one section dry separation magnetic pulley be the concentrate of 250-300mm send into send into behind the broken ore storage bin in two sections in two sections crusher carry out in two sections broken,
6) ore of crusher in crushing is sent to dummy car by conveyor in two sections, and dummy car is sent two sections in this ore into the dry separation magnetic pulley and carried out two stages of magnetic separation,
7) mine tailing selected of two sections dry separation magnetic pulleys is sent to behind the refuse bin with the automobile outward transport,
8) concentrate selected of two sections dry separation magnetic pulleys is sent into the vibratory screening apparatus ore storage bin by sending into vibratory screening apparatus to the ore deposit conveyor,
9) oversize of vibratory screening apparatus is sent into three sections fine crushers after sending into the fine crushing ore storage bin, and being crushed to granularity is to return vibratory screening apparatus behind 75-100mm,
10) through-screen size of vibratory screening apparatus is that 12-0mm sends into dry-type magnetic separator for ore fine,
11) mine tailing of dry-type magnetic separator for ore fine is transported outward with automobile after sending into refuse bin,
12) concentrate selected of dry-type magnetic separator for ore fine is sent into power house.
2. three sections preliminary election crushing process of low-grade magnetite according to claim 1 is characterized in that described one section primary crusher is the PE900X1200 jaw crusher.
3. three sections preliminary election crushing process of low-grade magnetite according to claim 1 is characterized in that described dry separation magnetic pulley is dry separation CTDG1212 magnetic pulley.
4. three sections preliminary election crushing process of low-grade magnetite according to claim 1 is characterized in that described two sections secondary crushers are the HP400 cone crusher.
5. three sections preliminary election crushing process of low-grade magnetite according to claim 1 is characterized in that described vibratory screening apparatus is the 2YA2460 vibratory screening apparatus.
6. three sections preliminary election crushing process of low-grade magnetite according to claim 1 is characterized in that described dry-type magnetic separator for ore fine is the CTL1030 dry-type magnetic separator for ore fine.
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102489397B (en) * | 2011-12-20 | 2013-08-07 | 鞍钢集团矿业公司 | Dry crushing, grinding, grading and four-stage magnetic separation process of magnetite |
| CN103769292B (en) * | 2014-01-10 | 2016-01-20 | 中钢集团马鞍山矿山研究院有限公司 | A kind of high preliminary election technique containing mud, high-grade Complex iron ore |
| CN109351447B (en) * | 2016-08-15 | 2020-10-27 | 马钢集团设计研究院有限责任公司 | Lean magnetite's ore dressing production system |
| CN106938219A (en) * | 2017-04-27 | 2017-07-11 | 酒泉钢铁(集团)有限责任公司 | A kind of beneficiation method of extreme poverty sand iron ore |
| CN108262134A (en) * | 2018-01-18 | 2018-07-10 | 辽宁科技大学 | The broken six sections of pre-selections crushing process of three sections of 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 |
| CN112808432A (en) * | 2021-03-19 | 2021-05-18 | 辽宁科技学院 | Processing technology for lean ore two-stage dry magnetic separation three-stage crushing |
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| CN101130177A (en) * | 2007-10-15 | 2008-02-27 | 王林 | Mineral dressing technique for low ore grade iron ore and mineral dressing equipment thereof |
| CN101219413A (en) * | 2008-01-22 | 2008-07-16 | 福州昌晖自动化系统有限公司 | Technique for manufacturing hyperpure iron extract |
| CN101559403A (en) * | 2009-05-31 | 2009-10-21 | 安徽大昌矿业集团有限公司 | Method for concentrating extremely low-grade refractory magnetite |
| CN101579654A (en) * | 2009-05-26 | 2009-11-18 | 包头市石宝铁矿集团有限责任公司 | Iron ore powder mineral dressing process |
| CN101590441A (en) * | 2008-05-26 | 2009-12-02 | 鞍钢集团矿业公司 | Magnetite dry-separation tailing-discarding pre-separation technology |
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| CN101130177A (en) * | 2007-10-15 | 2008-02-27 | 王林 | Mineral dressing technique for low ore grade iron ore and mineral dressing equipment thereof |
| CN101219413A (en) * | 2008-01-22 | 2008-07-16 | 福州昌晖自动化系统有限公司 | Technique for manufacturing hyperpure iron extract |
| CN101590441A (en) * | 2008-05-26 | 2009-12-02 | 鞍钢集团矿业公司 | Magnetite dry-separation tailing-discarding pre-separation technology |
| CN101579654A (en) * | 2009-05-26 | 2009-11-18 | 包头市石宝铁矿集团有限责任公司 | Iron ore powder mineral dressing process |
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Address after: 114051 Anshan District, Liaoning, No. 219 Road, No. 39, Tiedong Patentee after: Anshan Iron and Steel Group Mining Co., Ltd. Address before: 114051 Anshan District, Liaoning, No. 219 Road, No. 39, Tiedong Patentee before: Anshan Iron & Steel Group Mining Co., Ltd. |