CN102489397A - Dry dry crushing, grinding, grading and four-stage magnetic separation process of magnetite - Google Patents
Dry dry crushing, grinding, grading and four-stage magnetic separation process of magnetite Download PDFInfo
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Abstract
The invention relates to a dry type crushing, grinding, grading and four-stage magnetic separation process of magnetite, which is characterized by comprising the following steps of: feeding and crushing magnetite, feeding the crushed product into a dry type vertical mill, feeding the product out of the dry type vertical mill for air classification, and returning the coarse product after air classification back to the dry type vertical mill; feeding the fine product after air classification into a first stage of dry type weak magnetic rough separation, feeding the concentrate after the first stage of dry type weak magnetic rough separation into a first stage of dry type weak magnetic fine separation, feeding the concentrate after the first stage of dry type weak magnetic fine separation into a second stage of dry type weak magnetic fine separation, and feeding the concentrate after the second stage of dry type weak magnetic fine separation into a third stage of dry type weak magnetic fine separation; and taking the concentrate after the third stage of dry type weak magnetic fine separation as final concentrate, returning the tailings from the third stage of dry type weak magnetic fine separation back to the first stage of dry type weak magnetic rough separation, and combining the tailings from the first stage of dry type weak magnetic rough separation, the first stage of dry type weak magnetic fine separation and the second stage of dry type weak magnetic fine separation together as final tailings to be discarded. Under the anhydrous condition, iron ore concentrate with 63-67% concentrate grade can be obtained, energy saving and consumption reduction are realized, and the production cost is lowered.
Description
Technical field
The present invention relates to technical field of mineral processing, particularly a kind of magnetic iron ore dry type fragmentation, ore grinding, classification, four stages of magnetic separation technologies.
Background technology
At present, the magnetite separation technology that generally adopts both at home and abroad is mainly stage grinding, classification, single (multistage) magnetic separation process; Stage grinding, classification, single (multistage) magnetic separation, the fine screening classification magnetic separation process of regrinding; Continuous ore grinding, classification, single (multistage) magnetic separation process and stage grinding, classification, single (multistage) magnetic separation, magnetic concentrate floatation process etc.; Purpose is that the magnetic iron ore of monomer dissociation reaches effective enrichment; Reach the quality standard of ironmaking to the iron ore concentrate raw material; But these ore-dressing techniques all are the wet type ore-dressing techniques, and too busy to get away water is done medium; And before ore dressing, need carry out fragmentation, grinding operation to mineral, and these operations also are to adopt the wet grinding technology, in anhydrous or areas of serious, these wet grinding technology and wet type ore-dressing technique all can't obtain implementing.Wet grinding technology and wet type ore-dressing technique are adopted in particularly small-sized ore dressing plant in the water-deficient area, its energy consumption is higher, and production cost is also higher.
Summary of the invention
The present invention provides a kind of magnetic iron ore dry type fragmentation, ore grinding, classification, four stages of magnetic separation technologies, and purpose is under anhydrous condition, and the low-cost concentrate grade that obtains reaches 63-67% iron ore concentrate.
The objective of the invention is to realize through following technical proposals:
Magnetic iron ore dry type fragmentation of the present invention, ore grinding, classification, four stages of magnetic separation technologies; It is characterized in that magnetic iron ore is through fragmentation, dry type Vertical Mill, dry classification and four sections dry type magnetic separation operations; Its product is that grade reaches 63-67% granule iron concentrate, and concrete steps are following:
1) be that the magnetic iron ore of 0-500mm feeds crushing operation with granularity,
2) granularity is that the crushed product of 0-10mm feeds the operation of dry type Vertical Mill,
3) granularity is that the dry type Vertical Mill product of 0-0.5mm feeds the dry classification operation,
4) grade is that the dry classification coarse grain product of 25%--40%, granularity 0.076 ㎜-0.5 ㎜ turns back to the operation of dry type Vertical Mill, and grade is that the air classification particulate product of 25%--40%, granularity-0.076mm content 60-90% feeds the weak magnetic of one section dry type and roughly selects operation,
5) the weak magnetic of the one section dry type concentrate of roughly selecting operation feeds the weak selected operation of magnetic of one section dry type,
6) concentrate of one section weak selected operation of magnetic of dry type feeds the weak selected operation of magnetic of two sections dry types,
7) concentrate of two sections weak selected operations of magnetic of dry type feeds the weak selected operation of magnetic of three sections dry types,
8) concentrate of three sections weak selected operations of magnetic of dry type is a final concentrate, and its grade is that magnetic was roughly selected operation a little less than the mine tailing of the weak magnetic operation of 63-67%, three sections dry types turned back to one section dry type,
9) mine tailing of the selected mine tailing of the mine tailing roughly selected of the weak magnetic of one section dry type, one section weak magnetic of dry type and two sections weak magnetic of dry type lumps together to true tailings and abandons, and its grade is 8-12%.
The dry type air classification is adopted in described dry classification operation.
The characteristics of magnetic iron ore dry type fragmentation of the present invention, ore grinding, classification, four stages of magnetic separation technologies are:
Changed is the wet type ore-dressing technique of medium with water at present; Adopt fragmentation, dry milling, classification, four sections dry magnetic separation technologies, under anhydrous condition, accomplish fragmentation, ore grinding, classification, magnetic concentration working to ore, the acquisition concentrate grade is 63-67% iron ore concentrate; Realized energy-saving and cost-reducing through many broken few mills; Reduced production cost, remarkable in economical benefits is particularly suitable for the ore dressing production of medium-sized and small enterprises.
Description of drawings
Fig. 1 is a process chart of the present invention.
The specific embodiment
Below in conjunction with the description of drawings specific embodiment of the present invention.
As shown in Figure 1; Magnetic iron ore dry type fragmentation of the present invention, ore grinding, classification, four stages of magnetic separation technologies; It is characterized in that magnetic iron ore through fragmentation, dry type Vertical Mill, dry classification and four sections dry type magnetic separation operations, its product is that grade reaches 63-67% granule iron concentrate, and concrete steps are following:
1) be that the magnetic iron ore of 0-500mm feeds crushing operation with granularity,
2) granularity is that the crushed product of 0-10mm feeds the operation of dry type Vertical Mill,
3) granularity is that the dry type Vertical Mill product of 0-0.5mm feeds the dry classification operation,
4) grade is that the air classification coarse grain product of 25%--40%, granularity 0.076 ㎜-0.5 ㎜ turns back to the operation of dry type Vertical Mill, and grade is that the air classification particulate product of 25%--40%, granularity-0.076mm content 60-90% feeds the weak magnetic of one section dry type and roughly selects operation,
5) the weak magnetic of the one section dry type concentrate of roughly selecting operation feeds the weak selected operation of magnetic of one section dry type,
6) concentrate of one section weak selected operation of magnetic of dry type feeds the weak selected operation of magnetic of two sections dry types,
7) concentrate of two sections weak selected operations of magnetic of dry type feeds the weak selected operation of magnetic of three sections dry types,
8) concentrate of three sections weak selected operations of magnetic of dry type is a final concentrate, and its grade is that magnetic was roughly selected operation a little less than the mine tailing of the weak magnetic operation of 63-67%, three sections dry types turned back to one section dry type,
9) mine tailing of the selected mine tailing of the mine tailing roughly selected of the weak magnetic of one section dry type, one section weak magnetic of dry type and two sections weak magnetic of dry type lumps together to true tailings and abandons, and its grade is 8-12%.
The dry type air classification is adopted in described dry classification operation.
It is the wet type ore-dressing technique of medium with water at present that the present invention has changed; Adopt fragmentation, dry milling, classification, four sections dry magnetic separation technologies, under anhydrous condition, accomplish fragmentation, ore grinding, classification, magnetic concentration working to ore, the acquisition concentrate grade is 63-67% iron ore concentrate; Realized energy-saving and cost-reducing through many broken few mills; Reduced production cost, remarkable in economical benefits is particularly suitable for the ore dressing production of medium-sized and small enterprises.
Claims (2)
1. a magnetic iron ore dry type fragmentation, ore grinding, classification, four stages of magnetic separation technologies; It is characterized in that magnetic iron ore is through fragmentation, dry type Vertical Mill, dry classification and four sections dry type magnetic separation operations; Its product is that grade reaches 63-67% granule iron concentrate, and concrete steps are following:
1) be that the magnetic iron ore of 0-500mm feeds crushing operation with granularity,
2) granularity is that the crushed product of 0-10mm feeds the operation of dry type Vertical Mill,
3) granularity is that the dry type Vertical Mill product of 0-0.5mm feeds the dry classification operation,
4) grade is that the dry classification coarse grain product of 25%--40%, granularity 0.076 ㎜-0.5 ㎜ turns back to the operation of dry type Vertical Mill, and grade is that the dry classification particulate product of 25%--40%, granularity-0.076mm content 60-90% feeds the weak magnetic of one section dry type and roughly selects operation,
5) the weak magnetic of the one section dry type concentrate of roughly selecting operation feeds the weak selected operation of magnetic of one section dry type,
6) concentrate of one section weak selected operation of magnetic of dry type feeds the weak selected operation of magnetic of two sections dry types,
7) concentrate of two sections weak selected operations of magnetic of dry type feeds the weak selected operation of magnetic of three sections dry types,
8) concentrate of three sections weak selected operations of magnetic of dry type is a final concentrate, and its grade is that magnetic was roughly selected operation a little less than the mine tailing of the weak magnetic operation of 63-67%, three sections dry types turned back to one section dry type,
9) mine tailing of the selected mine tailing of the mine tailing roughly selected of the weak magnetic of one section dry type, one section weak magnetic of dry type and two sections weak magnetic of dry type lumps together to true tailings and abandons, and its grade is 8%--12%.
2. magnetic iron ore dry type fragmentation according to claim 1, ore grinding, classification, four stages of magnetic separation technologies is characterized in that described dry classification operation employing dry type air classification.
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103272698A (en) * | 2013-05-15 | 2013-09-04 | 包钢集团矿山研究院（有限责任公司） | Mineral separation process for recycling iron and rare earth in baotite magnetite flotation tailings |
| CN103567060A (en) * | 2012-07-20 | 2014-02-12 | 北京华夏建龙矿业科技有限公司 | Novel beneficiation process for sorting valuable mineral such as magnetite, apatite and ilmenite and product |
| CN103736663A (en) * | 2014-01-23 | 2014-04-23 | 陕西三沅重工发展股份有限公司 | Magnetite beneficiation method |
| CN107350059A (en) * | 2017-07-11 | 2017-11-17 | 甘肃酒钢集团宏兴钢铁股份有限公司 | A kind of refractory iron ore fluidization magnetizing roast dry grinding dry separation craft |
| 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 |
| CN108554629A (en) * | 2018-03-29 | 2018-09-21 | 安徽马钢张庄矿业有限责任公司 | Silicon ore-dressing technique drops in Iron concentrate upgrading |
| CN109569871A (en) * | 2018-12-18 | 2019-04-05 | 招金矿业股份有限公司蚕庄金矿 | A kind of secondary slime of lode gold ore and rough just separating flotation technique |
| CN110586317A (en) * | 2019-09-26 | 2019-12-20 | 中冶北方（大连）工程技术有限公司 | Dry magnetic separation-biological mineral separation process for treating sulfur-containing iron ore |
| CN110586315A (en) * | 2019-10-24 | 2019-12-20 | 武汉科技大学 | Full-dry type iron ore sorting method |
| CN111822129A (en) * | 2020-07-22 | 2020-10-27 | 中材（天津）粉体技术装备有限公司 | Iron ore dry grinding and dressing device and process |
| CN114100846A (en) * | 2021-11-25 | 2022-03-01 | 中钢设备有限公司 | Ore dressing process for dry grinding and dry separation of magnetite embedded with uneven particle size fraction |
| CN114713508A (en) * | 2022-04-06 | 2022-07-08 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for improving TFe grade of vanadium-containing iron ore concentrate |
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| CN103567060A (en) * | 2012-07-20 | 2014-02-12 | 北京华夏建龙矿业科技有限公司 | Novel beneficiation process for sorting valuable mineral such as magnetite, apatite and ilmenite and product |
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| CN103272698B (en) * | 2013-05-15 | 2014-12-10 | 包钢集团矿山研究院（有限责任公司） | Mineral separation process for recycling iron and rare earth in baotite magnetite flotation tailings |
| CN103736663A (en) * | 2014-01-23 | 2014-04-23 | 陕西三沅重工发展股份有限公司 | Magnetite beneficiation method |
| CN107350059A (en) * | 2017-07-11 | 2017-11-17 | 甘肃酒钢集团宏兴钢铁股份有限公司 | A kind of refractory iron ore fluidization magnetizing roast dry grinding dry separation craft |
| 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 |
| CN108554629A (en) * | 2018-03-29 | 2018-09-21 | 安徽马钢张庄矿业有限责任公司 | Silicon ore-dressing technique drops in Iron concentrate upgrading |
| CN109569871A (en) * | 2018-12-18 | 2019-04-05 | 招金矿业股份有限公司蚕庄金矿 | A kind of secondary slime of lode gold ore and rough just separating flotation technique |
| CN110586317A (en) * | 2019-09-26 | 2019-12-20 | 中冶北方（大连）工程技术有限公司 | Dry magnetic separation-biological mineral separation process for treating sulfur-containing iron ore |
| CN110586315A (en) * | 2019-10-24 | 2019-12-20 | 武汉科技大学 | Full-dry type iron ore sorting method |
| CN110586315B (en) * | 2019-10-24 | 2021-04-23 | 武汉科技大学 | Full-dry type iron ore sorting method |
| CN111822129A (en) * | 2020-07-22 | 2020-10-27 | 中材（天津）粉体技术装备有限公司 | Iron ore dry grinding and dressing device and process |
| CN114100846A (en) * | 2021-11-25 | 2022-03-01 | 中钢设备有限公司 | Ore dressing process for dry grinding and dry separation of magnetite embedded with uneven particle size fraction |
| CN114713508A (en) * | 2022-04-06 | 2022-07-08 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for improving TFe grade of vanadium-containing iron ore concentrate |
| CN114713508B (en) * | 2022-04-06 | 2023-06-30 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for improving TFe grade of vanadium-containing iron concentrate |
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Address after: 114001 Anshan District, Liaoning, No. 219 Road, No. 39, Tiedong Patentee after: Anshan Iron and Steel Group Mining Co., Ltd. Address before: 114001 Anshan District, Liaoning, No. 219 Road, No. 39, Tiedong Patentee before: Angang Group Mine Company |