CN103272684A - Hematite stage grinding and magnetic-separation-flotation process - Google Patents
Hematite stage grinding and magnetic-separation-flotation process Download PDFInfo
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- CN103272684A CN103272684A CN2013102314333A CN201310231433A CN103272684A CN 103272684 A CN103272684 A CN 103272684A CN 2013102314333 A CN2013102314333 A CN 2013102314333A CN 201310231433 A CN201310231433 A CN 201310231433A CN 103272684 A CN103272684 A CN 103272684A
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Abstract
The invention belongs to the technical field of mineral processing technology and particularly relates to a hematite stage grinding and magnetic-separation-flotation process. Raw ore is performed with a first section of closed loop grinding operation, a first section of grader feeds the ore to a first section of mediate-magnet magnetic separator and a second section of strong-magnet magnetic separator in an overflowing mode, bulk concentrate of the first section of mediate-magnet magnetic separator and the first section of strong-magnet magnetic separator is performed with a second section of closed loop grinding operation and then fed to a second section of mediate-magnet magnetic separator and a second section of strong-magnet magnetic separator for gangue throwing through a second section of grader in an overflowing mode, second section of mediate-magnet concentrate is fed into a permanent magnet magnetic field screening machine and a magnetic separation column to separate magnetic concentrate, and permanent magnet gangue, magnetic field screening machine gangue, magnetic separation column gangue and second section of strong-magnet concentrate are mixed and concentrated and then performed with flotation. Magnetic separation concentrate and floatation concentrate are the final concentrate. The hematite stage grinding and magnetic-separation-flotation process has the advantages of fully expressing low-cost magnetic separation advantages, selecting qualified concentrate with grade higher than 65% through a magnetic separation method, reducing amount of ore needing flotation, ensuring high-grade final concentrate with the grade higher than 65%, reducing beneficiation cost, and being simple in process, stable in technical index and convenient to control.
Description
Technical field
The invention belongs to the ore-dressing technique technical field, particularly a kind of bloodstone stage grinding, magnetic separation-floatation process.
Background technology
The Anshan type lean hematite ore is the important iron ore type of China.Patent of invention " extreme poverty rhombohedral iron ore beneficiation technics " has proposed the suitable ore-dressing technique of extreme poverty bloodstone: as shown in Figure 1, raw ore feeds one section closed circuit grinding operation, one section classification overflow feeds magnetic magnetic separation and one section magnetic separator operation in one section, the jettisoning mine tailing, the bulk concentrate of magnetic magnetic separation and one section magnetic separator feeds two sections closed circuit grinding operations in one section, secondary classification overflow feeds magnetic magnetic separation and two sections magnetic separator operations throwing tails in two sections after concentrating, jettisoning mine tailing again, the bulk concentrate of magnetic magnetic separation and two sections magnetic separators feeds flotation operation in two sections after concentrating, the flotation concentrate of selecting is final concentrate, flotation tailing, one section magnetic separator mine tailing and two sections magnetic separator mine tailings are true tailings.This technology has been given full play to the advantage of stage grinding, utilizes in two sections magnetic magnetic separation and magnetic separator to abandon low-grade gangue in a large number under the corase grind situation, greatly reduces the flow process load, guarantees low cost movement; Give full play to the efficient advantage of flotation, guaranteed high-grade flotation final concentrate.
Development along with magnetic separation process and equipment, this technology also exposes following problem: all to feed flotation operation after concentrating be irrational to the bulk concentrate of magnetic magnetic separation and two sections magnetic separators in two sections, because middle magnetic magnetic concentrate can be selected qualified final concentrate by the method for magnetic separation, can further bring into play magnetic separation advantage cheaply again, reduce and go into to float the ore deposit amount, both guarantee high-grade final concentrate, also reduced beneficiation cost.
Summary of the invention
The purpose of this invention is to provide a kind of bloodstone stage grinding, magnetic separation-floatation process, that purpose is is fairly simple, stable, the efficiency of separation is higher, lower-cost ore-dressing technique, improves the utilization of resources effect of bloodstone stone and the technical-economic index of ore dressing enterprise
The objective of the invention is to realize by following technical proposals:
Bloodstone stage grinding of the present invention, magnetic separation-floatation process comprise that the following step poly-:
1) raw ore feeds by primary grinding machine and one section one section closed circuit grinding operation that grader is formed, and the overflow of this section grader feeds magnetic separator in a section,
2) one section mine tailing of magnetic separator feeds one section strong magnetic separator in described one section, in one section in one of magnetic separator section the bulk concentrate of one section strong magnetic concentrate of magnetic concentrate and one section strong magnetic separator feed two sections closed circuit grinding operations, the mine tailing of one section strong magnetic separator is thrown tail
3) described two sections closed circuit grinding operations are made up of two sections graders and secondary grinding machine, throw tails through two sections strong magnetic operations, jettisoning mine tailing again,
It is characterized in that:
4) overflow of described two sections graders feeds magnetic separator in two sections, selects in two sections magnetic tail ore deposit in magnetic concentrate and two sections,
5) the magnetic concentrate feeds permanent magnetic separator and selects permanent magnetism concentrate and permanent magnetism mine tailing in described two sections, and the magnetic tail ore deposit feeds two sections strong magnetic separators in described two sections, selects two sections strong magnetic concentrate and two sections strong magnetic tail ore deposits,
6) described permanent magnetism concentrate feeds the magnetic field screening machine and selects magnetic field screening machine concentrate and magnetic field screening machine mine tailing,
7) described magnetic field screening machine concentrate feeds the magnetic separation post and selects magnetic concentrate and magnetic separation post mine tailing,
8) described permanent magnetism mine tailing, magnetic field screening machine mine tailing, magnetic separation post mine tailing and two sections strong magnetic concentrate mixing feed flotation operation after concentrating, the flotation concentrate of selecting and flotation tailing,
9) magnetic separation post concentrate and the flotation concentrate selected of described magnetic separation post is final concentrate,
10) mine tailing of described one section strong magnetic, two sections strong magnetic tail ore deposits and flotation tailing are true tailings.
The invention has the beneficial effects as follows:
1, this technology has been given full play to magnetic separation advantage cheaply, selects grade qualified concentrate more than 65% by the method for magnetic separation, reduces to go into float the ore deposit and measure, and has both guaranteed high-grade final concentrate more than 65%, has also reduced beneficiation cost;
2, flow process is simple, and technical indicator is stable, is convenient to control.
Description of drawings
Fig. 1 is former process chart.
Fig. 2 is process chart of the present invention.
The specific embodiment
Below in conjunction with description of drawings the specific embodiment of the present invention.
As shown in Figure 2, bloodstone stage grinding of the present invention, magnetic separation-floatation process comprise that the following step poly-:
1) raw ore feeds by primary grinding machine and one section one section closed circuit grinding operation that grader is formed, and the overflow of this section grader feeds magnetic separator in a section,
2) one section mine tailing of magnetic separator feeds one section strong magnetic separator in described one section, in one section in one of magnetic separator section the bulk concentrate of one section strong magnetic concentrate of magnetic concentrate and one section strong magnetic separator feed two sections closed circuit grinding operations, the mine tailing of one section strong magnetic separator is thrown tail
3) described two sections closed circuit grinding operations are made up of two sections graders and secondary grinding machine, throw tails through two sections strong magnetic operations, jettisoning mine tailing again,
It is characterized in that:
4) overflow of described two sections graders feeds magnetic separator in two sections, selects in two sections magnetic tail ore deposit in magnetic concentrate and two sections,
5) the magnetic concentrate feeds permanent magnetic separator and selects permanent magnetism concentrate and permanent magnetism mine tailing in described two sections, and the magnetic tail ore deposit feeds two sections strong magnetic separators in described two sections, selects two sections strong magnetic concentrate and two sections strong magnetic tail ore deposits,
6) described permanent magnetism concentrate feeds the magnetic field screening machine and selects magnetic field screening machine concentrate and magnetic field screening machine mine tailing,
7) described magnetic field screening machine concentrate feeds the magnetic separation post and selects magnetic concentrate and magnetic separation post mine tailing,
8) described permanent magnetism mine tailing, magnetic field screening machine mine tailing, magnetic separation post mine tailing and two sections strong magnetic concentrate mixing feed flotation operation after concentrating, the flotation concentrate of selecting and flotation tailing,
9) magnetic separation post concentrate and the flotation concentrate selected of described magnetic separation post is final concentrate,
10) mine tailing of described one section strong magnetic, two sections strong magnetic tail ore deposits and flotation tailing are true tailings.
Embodiment
Head grade is that 18～30% bloodstone stone feeds one section closed circuit grinding, is milled to that-200 order grain size contents reach 50～70% in one section classification overflow.One section classification overflow magnetic separator operation in a section (magnetic induction intensity be 0.2～0.4T) and one section strong magnetic separator (background field intensity 0.6～1.2T) is thrown tail, the jettisoning grade is 7～9% mine tailing, grade is that 35～45% concentrate feeds two sections closed circuit grindings, be milled to that-200 order grain size contents reach more than 90% in two sections classification overflows, two sections classification overflows feed magnetic separator operation in two sections (magnetic induction intensity be 0.2～0.4T) and two sections strong magnetic separators (background field intensity 12000 Oe) throw tail, the jettisoning grade is 8～10% mine tailing, (magnetic induction intensity is 0.1～0.2T) to the magnetic concentrate through permanent magnetic separator in two sections, the magnetic field screening machine, the magnetic separation post is selected the magnetic separation post concentrate of grade more than 65%, the permanent-magnet concentration mine tailing, magnetic field screening machine mine tailing, magnetic separation post mine tailing and two sections strong magnetic concentrate mix back (grade is 30～40%) and feed flotation operation after concentrated, and selecting flotation concentrate and the grade of grade more than 65% is 13～18% flotation tailing.Magnetic separation post concentrate and flotation concentrate are final concentrate, and grade is more than 65%.One section strong magnetic tail ore deposit, two sections strong magnetic tail ore deposits and flotation tailing are true tailings, and grade is 10～14%.
Bloodstone stage grinding of the present invention, magnetic separation-floatation process have been given full play to magnetic separation advantage cheaply, select grade qualified concentrate more than 65% by the method for magnetic separation, reduce the ore deposit amount that enters the flotation operation, both guarantee percentage by weight high-grade final concentrate more than 65%, also reduced beneficiation cost.
Claims (1)
1. a bloodstone stage grinding, magnetic separation-floatation process comprise that the following step poly-:
1) raw ore feeds by primary grinding machine and one section one section closed circuit grinding operation that grader is formed, and the overflow of this section grader feeds magnetic separator in a section,
2) one section mine tailing of magnetic separator feeds one section strong magnetic separator in described one section, in one section in one of magnetic separator section the bulk concentrate of one section strong magnetic concentrate of magnetic concentrate and one section strong magnetic separator feed two sections closed circuit grinding operations, the mine tailing of one section strong magnetic separator is thrown tail
3) described two sections closed circuit grinding operations are made up of two sections graders and secondary grinding machine, throw tails through two sections strong magnetic operations, jettisoning mine tailing again,
It is characterized in that:
4) overflow of described two sections graders feeds magnetic separator in two sections, selects in two sections magnetic tail ore deposit in magnetic concentrate and two sections,
5) the magnetic concentrate feeds permanent magnetic separator and selects permanent magnetism concentrate and permanent magnetism mine tailing in described two sections, and the magnetic tail ore deposit feeds two sections strong magnetic separators in described two sections, selects two sections strong magnetic concentrate and two sections strong magnetic tail ore deposits,
6) described permanent magnetism concentrate feeds the magnetic field screening machine and selects magnetic field screening machine concentrate and magnetic field screening machine mine tailing,
7) described magnetic field screening machine concentrate feeds the magnetic separation post and selects magnetic concentrate and magnetic separation post mine tailing,
8) described permanent magnetism mine tailing, magnetic field screening machine mine tailing, magnetic separation post mine tailing and two sections strong magnetic concentrate mixing feed flotation operation after concentrating, the flotation concentrate of selecting and flotation tailing,
9) magnetic separation post concentrate and the flotation concentrate selected of described magnetic separation post is final concentrate,
10) mine tailing of described one section strong magnetic, two sections strong magnetic tail ore deposits and flotation tailing are true tailings.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103586146A (en) * | 2013-11-13 | 2014-02-19 | 鞍钢集团矿业公司 | Mineral processing process for processing mixed ore of magnetic iron ore and hematite-limonite ore |
| CN104888947A (en) * | 2015-06-12 | 2015-09-09 | 鞍钢集团矿业公司 | Magnetic separation-centrifuge separation technology of micro-fine particle dissemination magnet-hematite mixed ore |
| CN104888960A (en) * | 2015-06-12 | 2015-09-09 | 鞍钢集团矿业公司 | Magnetic-floating separation technology of micro-fine particle dissemination magnet-hematite mixed ore |
| CN104959228A (en) * | 2015-07-24 | 2015-10-07 | 段风梅 | Lean magnetite beneficiation method capable of reducing fineness of grinding ore |
| CN108283988A (en) * | 2018-02-09 | 2018-07-17 | 鞍钢集团矿业设计研究院有限公司 | Stage grinding magnetic weight flow processing mixed type iron ore technique |
| CN108355827A (en) * | 2018-02-09 | 2018-08-03 | 鞍钢集团矿业设计研究院有限公司 | Continuous Grinding magnetic weight flow processing mixed type iron ore technique |
| CN108465551A (en) * | 2018-03-07 | 2018-08-31 | 鞍钢集团矿业有限公司 | Add the magnetic iron ore secondary grinding technique of grinding aid sodium tripolyphosphate |
| CN110665640A (en) * | 2019-10-15 | 2020-01-10 | 江苏旌凯中科超导高技术有限公司 | Pre-enrichment and concentration process of ultrafine ferrotitanium ore material |
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| CN102019228A (en) * | 2009-09-18 | 2011-04-20 | 鞍钢集团矿业公司 | Ultra-lean hematite dressing process |
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| CN102631984A (en) * | 2012-04-26 | 2012-08-15 | 鞍钢集团矿业公司 | Hematite roasting, stage grinding, intermediate magnetic separation, fineness classifying, gravity concentration-magnetic separation technique |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103586146A (en) * | 2013-11-13 | 2014-02-19 | 鞍钢集团矿业公司 | Mineral processing process for processing mixed ore of magnetic iron ore and hematite-limonite ore |
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| CN104888960A (en) * | 2015-06-12 | 2015-09-09 | 鞍钢集团矿业公司 | Magnetic-floating separation technology of micro-fine particle dissemination magnet-hematite mixed ore |
| CN104959228A (en) * | 2015-07-24 | 2015-10-07 | 段风梅 | Lean magnetite beneficiation method capable of reducing fineness of grinding ore |
| CN108283988A (en) * | 2018-02-09 | 2018-07-17 | 鞍钢集团矿业设计研究院有限公司 | Stage grinding magnetic weight flow processing mixed type iron ore technique |
| CN108355827A (en) * | 2018-02-09 | 2018-08-03 | 鞍钢集团矿业设计研究院有限公司 | Continuous Grinding magnetic weight flow processing mixed type iron ore technique |
| CN108283988B (en) * | 2018-02-09 | 2020-03-31 | 鞍钢集团矿业设计研究院有限公司 | Process for treating mixed iron ore by stage ore grinding magnetic-gravity flow |
| CN108465551A (en) * | 2018-03-07 | 2018-08-31 | 鞍钢集团矿业有限公司 | Add the magnetic iron ore secondary grinding technique of grinding aid sodium tripolyphosphate |
| CN110665640A (en) * | 2019-10-15 | 2020-01-10 | 江苏旌凯中科超导高技术有限公司 | Pre-enrichment and concentration process of ultrafine ferrotitanium ore material |
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| CN103272684B (en) | 2014-11-05 |
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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 |