CN106824508A - A kind of broken mill ore magnetic selection technique of magnetic iron ore - Google Patents
A kind of broken mill ore magnetic selection technique of magnetic iron ore Download PDFInfo
- Publication number
- CN106824508A CN106824508A CN201710015476.6A CN201710015476A CN106824508A CN 106824508 A CN106824508 A CN 106824508A CN 201710015476 A CN201710015476 A CN 201710015476A CN 106824508 A CN106824508 A CN 106824508A
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- magnetic
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- magnetic separation
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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
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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
- B03B1/00—Conditioning for facilitating separation by altering physical properties of the matter to be treated
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Abstract
The present invention relates to a kind of broken mill ore magnetic selection technique of magnetic iron ore, including raw ore is crushed to the mm of 50mm 0 through coarse crushing with, it is characterised in that also comprise the following steps：The product crushed by directly feeds the closed-circuit system that high-pressure roller mill is constituted with equal thick screen；High-pressure roller mill product is fed into pre-selection wet magnetic separator carries out pre-selection wet magnetic separation, sorts out concentrate and tailings；Pre-selection wet magnetic separation concentrate is fed into vertical mill mill, vertical mill product feeds scalping cyclone group and is classified, the product of below scalping 0.074mm feeds two sections of elutriation magnetic separators and carries out sorting operation, and the product of more than scalping 0.074mm returns to vertical mill；Two sections of concentrate of elutriation magnetic separator sorting operation are the final concentrate that grade is 67.00%, and pre-selection wet magnetic separation mine tailing, two sections of elutriation magnetic separator mine tailings merge into true tailings.It is an advantage of the invention that：Technological process is shortened, energy consumption is reduced, cost is reduced.
Description
Technical field
The invention belongs to mineral processing technology field, more particularly to a kind of magnetic iron ore crushes-ore grinding-magnetic separation process.
Background technology
Magnetic iron ore is generally using " method of broken-stage grinding-magnetic separation is sorted, and technological process is：Magnet raw ore
（1000mm-0）By three sections of crushing operations of coarse broken, the broken, thin broken, ore grain size reaches 12 ~ 0mm（Product after thin broken）, pass through
One section of closed circuit grinding, scalping overflow granularity reaches the mesh of granularity -200 content 55 ~ 60%, is sorted by a stages of magnetic separation, jettisoning portion
Divide coarse grain qualified tailings, a magnetic separation rough concentrate reaches -200 mesh and contain by two sections of mill closed circuit grindings, secondary grading overflow granularity
Amount 85% ~ 90%, after being sorted through two stage magnetic separators, two stage magnetic separator concentrate feed three stages of magnetic separation, and the concentrate of three stages of magnetic separation is final
It is rough, its grade 66%, yield is 33.94%, and the rate of recovery is 80%.
Have that crushing operation hop count is more, grinding operation hop count is more, flowage structure is very long in this technological process, ore transhipment
Point is more, and floor space is big, and environmental pollution is serious, and energy consumption is larger, as shown in Figure 1.
The content of the invention
- ore grinding-magnetic separation process is crushed it is an object of the invention to provide a kind of magnetic iron ore, original conventional process flow knot is solved
Structure is complicated, and floor space is big, the problem of high energy consumption, while phase can be obtained when mog is less than traditional 10 percentage points
Same concentrate product, it is energy-saving.
The purpose of the present invention is realized by following technical proposals.
A kind of magnetic iron ore of the invention crushes-ore grinding-magnetic separation process, including by granularity for the raw ore warp of 1000mm-0mm is thick
It is broken to be crushed to 50mm-0 mm with, it is characterised in that also to comprise the following steps：
1）The product that 50mm-0 mm are crushed by directly feeds the closed-circuit system that high-pressure roller mill is constituted with equal thick screen；
2）High-pressure roller mill 3mm-0 mm products are fed into big granularity pre-selection wet magnetic separator carries out pre-selection wet magnetic separation, sorts out
Pre-selection wet magnetic separation concentrate and pre-selection wet magnetic separation mine tailing；
3）The concentrate of 3mm-0mm pre-selection wet magnetic separations is fed into vertical mill and is milled to -0.074mm80%-90%；
4）The vertical mill product of -0.074mm80%-90% feeds scalping cyclone group and is classified, and scalping -
The product of below 0.074mm80%-90% directly feeds one section of elutriation magnetic separator and two sections of elutriation magnetic separators and carries out sorting operation, one
The product of secondary more than classification -0.074mm80%-90% returns to vertical mill；The concentrate of two sections of elutriation magnetic separator sorting operations is final
Concentrate, its grade is 67.00%, and yield is 36.78%, and the rate of recovery is 80%, pre-selection wet magnetic separation mine tailing, one section of elutriation magnetic separator
Mine tailing and two sections of elutriation magnetic separator mine tailings merge into true tailings, and its grade is 8.86%.
It is an advantage of the invention that：
The closed-circuit system that the present invention is constituted in ore grinding using high-pressure roller mill and equal thick screen, instead of the in small, broken bits of traditional handicraft and
Part primary grinding operation；Big granularity pre-selection wet magnetic separator can in advance carry out throwing tail, energy-saving；
Vertical mill, disposably by mineral ore grinding to -0.074mm80%-90% can substitute traditional primary grinding and secondary grinding is made
Industry, reduces the auxiliary equipment number of units such as pump and cyclone, and energy conservation and consumption reduction effects are obvious；Elutriation magnetic separator is weight, magnetic, floating multiselect simultaneously
Other field is sorted, lower than traditional mog by 10% in the iron ore concentrate of like products quality.Energy-conservation is obvious, alternative tradition
2nd, three, four stages of magnetic separation operation.
Brief description of the drawings
Fig. 1 is former mineral processing circuit figure.
Fig. 2 is process chart of the invention.
Specific embodiment
As shown in Fig. 2 a kind of magnetic iron ore of the invention crushes-ore grinding-magnetic separation process, including it is 1000mm-0mm by granularity
Raw ore through coarse crushing and in be crushed to 50mm-0 mm, it is characterised in that also comprise the following steps：
1）The product that 50mm-0 mm are crushed by directly feeds the closed-circuit system that high-pressure roller mill is constituted with equal thick screen；
2）High-pressure roller mill 3mm-0 mm products are fed into big granularity pre-selection wet magnetic separator carries out pre-selection wet magnetic separation, sorts
Go out to preselect wet magnetic separation concentrate and pre-selection wet magnetic separation mine tailing；The magnetic field intensity of described big granularity pre-selection wet magnetic separator is
4000 Gausses.The closed-circuit system that the present invention is constituted using high-pressure roller mill in ore grinding with equal thick screen, instead of traditional handicraft
In small, broken bits and part primary grinding operation；Big granularity pre-selection wet magnetic separator can in advance carry out throwing tail, energy-saving；
3）The concentrate of 3mm-0mm pre-selection wet magnetic separations is fed into vertical mill and is milled to -0.074mm80%-90%；Vertical mill, can be with one
Mineral ore grinding to -0.074mm80%-90% is substituted traditional primary grinding and secondary grinding operation by secondary property, reduces pump and cyclone
Etc. auxiliary equipment number of units, energy conservation and consumption reduction effects are obvious；
4）The vertical mill product of -0.074mm80%-90% feeds scalping cyclone group and is classified, and scalping -
The product of below 0.074mm80%-90% directly feeds one section of elutriation magnetic separator and two sections of elutriation magnetic separators and carries out sorting operation, one
The product of secondary more than classification -0.074mm80%-90% returns to vertical mill；The concentrate of two sections of elutriation magnetic separator sorting operations is final
Concentrate, its grade is 67.00%, and yield is 36.78%, and the rate of recovery is 80%, pre-selection wet magnetic separation mine tailing, one section of elutriation magnetic separator
Mine tailing and two sections of elutriation magnetic separator mine tailings merge into true tailings, and its grade is 8.86%.Elutriation magnetic separator is weight, magnetic, floating multiselect
Other field is sorted, lower than traditional mog by 10% in the iron ore concentrate of like products quality.Energy-conservation is obvious, alternative tradition
2nd, three, four stages of magnetic separation operation.
It is of the invention greatly to shorten technological process, system energy consumption is reduced, reduce supporting auxiliary equipment.Reduce operation ring
Section, reduces investment and operating cost.
Claims (2)
1. a kind of magnetic iron ore crushes-ore grinding-magnetic separation process, including by granularity for the raw ore of 1000mm-0mm breaks through coarse crushing with
It is broken to 50mm-0 mm, it is characterised in that also comprise the following steps：
1）The product that 50mm-0 mm are crushed by directly feeds the closed-circuit system that high-pressure roller mill is constituted with equal thick screen；
2）High-pressure roller mill 3mm-0 mm products are fed into big granularity pre-selection wet magnetic separator carries out pre-selection wet magnetic separation, sorts out
Pre-selection wet magnetic separation concentrate and pre-selection wet magnetic separation mine tailing；
3）3mm-0mm pre-selection wet magnetic separation concentrate are fed into vertical mill and is milled to -0.074mm80%-90%；
4）The vertical mill product of -0.074mm80%-90% feeds scalping cyclone group and is classified, and scalping -
The product of below 0.074mm80%-90% directly feeds one section of elutriation magnetic separator and two sections of elutriation magnetic separators and carries out sorting operation, one
The product of secondary more than classification -0.074mm80%-90% returns to vertical mill；The concentrate of two sections of elutriation magnetic separator sorting operations is final
Concentrate, its grade is 67.00%, and yield is 36.78%, and the rate of recovery is 80%, pre-selection wet magnetic separation mine tailing, one section of elutriation magnetic separator
Mine tailing and two sections of elutriation magnetic separator mine tailings merge into true tailings, and its grade is 8.86%.
2. magnetic iron ore according to claim 1 crushes-ore grinding-magnetic separation process, it is characterised in that described big granularity pre-selection
The magnetic field intensity of wet magnetic separator is 4000 Gausses.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710015476.6A CN106824508A (en) | 2017-01-10 | 2017-01-10 | A kind of broken mill ore magnetic selection technique of magnetic iron ore |
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|---|---|---|---|
| CN201710015476.6A CN106824508A (en) | 2017-01-10 | 2017-01-10 | A kind of broken mill ore magnetic selection technique of magnetic iron ore |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107694745A (en) * | 2017-11-15 | 2018-02-16 | 中冶北方（大连）工程技术有限公司 | A kind of elutriation magnetic separator tailing treatment technology |
| CN108672081A (en) * | 2018-07-05 | 2018-10-19 | 鞍钢集团矿业有限公司 | Magnetic iron ore high pressure roller mill wet type pre-selecting-stage grinding-dusting cover tower grinds magnetic separation process |
| CN108855584A (en) * | 2018-06-28 | 2018-11-23 | 马钢集团设计研究院有限责任公司 | A kind of difficulty selects the ore-dressing technique of producing high-quality iron ore concentrate by low-grade magnetic iron ore |
| CN108970800A (en) * | 2018-06-28 | 2018-12-11 | 马钢集团设计研究院有限责任公司 | The ore-dressing technique of dioxide-containing silica in a kind of reduction iron ore concentrate |
| CN108993764A (en) * | 2018-06-28 | 2018-12-14 | 马钢集团设计研究院有限责任公司 | Miscellaneous process drops in a kind of chromium depleted zone upgrading |
| CN109692753A (en) * | 2019-01-08 | 2019-04-30 | 中冶北方（大连）工程技术有限公司 | A kind of ore-dressing technique handling easy argillization Ultra-low-grade magnetite stone |
| 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 |
| CN111686926A (en) * | 2020-06-12 | 2020-09-22 | 鞍钢集团矿业有限公司 | Rough and fine separation-magnetism-weight-floatation combined process for treating magnetite |
| CN111715393A (en) * | 2020-06-29 | 2020-09-29 | 安徽马钢矿业资源集团姑山矿业有限公司 | Mineral separation method for grading, recleaning and quality improvement of fine-grained magnetite concentrate |
| CN113070151A (en) * | 2021-03-18 | 2021-07-06 | 沈阳盛世五寰科技有限公司 | Crushing and grading process for reducing processing cost of magnetic ore |
| WO2022095145A1 (en) * | 2020-11-03 | 2022-05-12 | 安徽马钢矿业资源集团南山矿业有限公司 | Simple-workflow magnetite beneficiation process and system |
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| CN105921271A (en) * | 2016-06-15 | 2016-09-07 | 沈阳隆基电磁科技股份有限公司 | Intelligent elutriation magnetic separator and magnetic separation method |
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| CN103785518A (en) * | 2014-02-28 | 2014-05-14 | 重钢西昌矿业有限公司 | Method for comprehensively recycling ultra-lean vanadium-titanium magnetite ores |
| CN104162475A (en) * | 2014-05-16 | 2014-11-26 | 马钢集团设计研究院有限责任公司 | High-efficiency and energy-saving new lean magnetite combined milling magnetic separation method |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107694745A (en) * | 2017-11-15 | 2018-02-16 | 中冶北方（大连）工程技术有限公司 | A kind of elutriation magnetic separator tailing treatment technology |
| CN108855584A (en) * | 2018-06-28 | 2018-11-23 | 马钢集团设计研究院有限责任公司 | A kind of difficulty selects the ore-dressing technique of producing high-quality iron ore concentrate by low-grade magnetic iron ore |
| CN108970800A (en) * | 2018-06-28 | 2018-12-11 | 马钢集团设计研究院有限责任公司 | The ore-dressing technique of dioxide-containing silica in a kind of reduction iron ore concentrate |
| CN108993764A (en) * | 2018-06-28 | 2018-12-14 | 马钢集团设计研究院有限责任公司 | Miscellaneous process drops in a kind of chromium depleted zone upgrading |
| CN108672081A (en) * | 2018-07-05 | 2018-10-19 | 鞍钢集团矿业有限公司 | Magnetic iron ore high pressure roller mill wet type pre-selecting-stage grinding-dusting cover tower grinds magnetic separation process |
| CN109692753A (en) * | 2019-01-08 | 2019-04-30 | 中冶北方（大连）工程技术有限公司 | A kind of ore-dressing technique handling easy argillization Ultra-low-grade magnetite stone |
| 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 |
| CN111686926A (en) * | 2020-06-12 | 2020-09-22 | 鞍钢集团矿业有限公司 | Rough and fine separation-magnetism-weight-floatation combined process for treating magnetite |
| CN111715393A (en) * | 2020-06-29 | 2020-09-29 | 安徽马钢矿业资源集团姑山矿业有限公司 | Mineral separation method for grading, recleaning and quality improvement of fine-grained magnetite concentrate |
| WO2022095145A1 (en) * | 2020-11-03 | 2022-05-12 | 安徽马钢矿业资源集团南山矿业有限公司 | Simple-workflow magnetite beneficiation process and system |
| CN113070151A (en) * | 2021-03-18 | 2021-07-06 | 沈阳盛世五寰科技有限公司 | Crushing and grading process for reducing processing cost of magnetic ore |
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Application publication date: 20170613 |