CN103272684B - Hematite stage grinding and magnetic-separation-flotation process - Google Patents
Hematite stage grinding and magnetic-separation-flotation process Download PDFInfo
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- CN103272684B CN103272684B CN201310231433.3A CN201310231433A CN103272684B CN 103272684 B CN103272684 B CN 103272684B CN 201310231433 A CN201310231433 A CN 201310231433A CN 103272684 B CN103272684 B CN 103272684B
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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 ore-dressing technique technical field, particularly a kind of bloodstone stage grinding, magnetic separation-floatation process.
Background technology
The iron ore type that Anshan type lean hematite ore Shi Shi China is important.Patent of invention " ultra-lean hematite dressing process " has proposed the suitable ore-dressing technique of extreme poverty bloodstone: as shown in Figure 1, raw ore feeds one section of closed circuit grinding operation, one section of Grading Overflow feeds magnetic magnetic separation and one section of magnetic separator operation in one section, jettisoning mine tailing, in one section, the bulk concentrate of magnetic magnetic separation and one section of magnetic separator feeds two sections of closed circuit grinding operations, secondary grading overflow feeds magnetic magnetic separation and two sections of magnetic separator operations throwing tails in two sections after concentrated, jettisoning mine tailing again, in two sections, the bulk concentrate of magnetic magnetic separation and two sections of magnetic separators feeds flotation operation after concentrated, the flotation concentrate of selecting is final concentrate, flotation tailing, one section of magnetic separator mine tailing and two sections of magnetic separator mine tailings are true tailings.This technique has been given full play to the advantage of stage grinding, utilizes magnetic magnetic separation and magnetic separator in two sections to abandon in a large number low-grade gangue in corase grind situation, greatly reduces 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 technique also exposes following problem: in two sections, after concentrated, all to feed flotation operation be irrational to the bulk concentrate of magnetic magnetic separation and two sections of magnetic separators, because middle magnetic magnetic concentrate can be selected qualified final concentrate by the method for magnetic separation, can further bring into play again magnetic separation advantage cheaply, reduce into floating ore deposit amount, both guarantee high-grade final concentrate, also reduced beneficiation cost.
Summary of the invention
The object of this invention is to provide a kind of bloodstone stage grinding, magnetic separation-floatation process, that object is is fairly simple, stable, the efficiency of separation is higher, lower-cost ore-dressing technique, improves the utilization of resources effect of hematite and the technical-economic index of Mineral Processing Enterprises
The object of the invention is to realize by following technical proposals:
Bloodstone stage grinding of the present invention, magnetic separation-floatation process, comprise that following step is poly-:
1) raw ore feeds by primary grinding machine and one section of one section of closed circuit grinding operation that grader forms, and the overflow of this section of grader feeds magnetic separator in a section,
2) in one section described in, one section of mine tailing of magnetic separator feeds one section of strong magnetic separator, in one section, in one of magnetic separator section, the bulk concentrate of one section of high intensity magnetic mineral of magnetic concentrate and one section of strong magnetic separator feeds two sections of closed circuit grinding operations, the mine tailing of one section of strong magnetic separator is thrown tail
3) two sections of described closed circuit grinding operations are comprised of two sections of graders and secondary grinding machine, through two sections strong magnetic operations, throw tail, then jettisoning mine tailing,
It is characterized in that:
4) overflow of two sections of described graders feeds magnetic separator in two sections, selects in two sections magnetic tail ore deposit in magnetic concentrate and two sections,
5) magnetic concentrate feeds permanent magnetic separator and selects permanent magnetism concentrate and permanent magnetism mine tailing in described two sections, and magnetic tail ore deposit feeds two sections of strong magnetic separators in described two sections, selects two sections of high intensity magnetic minerals and two sections of strong magnetic tail ore deposits,
6) described permanent magnetism concentrate feeds Magnetic field screening separator and selects Magnetic field screening separator concentrate and Magnetic field screening separator mine tailing,
7) described Magnetic field screening separator concentrate feeds column magnetic separator and selects magnetic concentrate and column magnetic separator mine tailing,
8) described permanent magnetism mine tailing, Magnetic field screening separator mine tailing, column magnetic separator mine tailing and two sections of high intensity magnetic minerals mixing feed flotation operation after concentrated, the flotation concentrate of selecting and flotation tailing,
9) described column magnetic separator is selected column magnetic separator concentrate and flotation concentrate are final concentrate,
10) mine tailing of one section of described strong magnetic, two sections of strong magnetic tail ore deposits and flotation tailing are true tailings.
The invention has the beneficial effects as follows:
1, this technique has been given full play to magnetic separation advantage cheaply, by the method for magnetic separation, selects the more than 65% qualified concentrate of grade, reduces into floating ore deposit amount, has both guaranteed more than 65% high-grade final concentrate, has also reduced beneficiation cost;
2, flow process is simple, and technical indicator is stable, is convenient to control.
Accompanying drawing explanation
Fig. 1 is former process chart.
Fig. 2 is process chart of the present invention.
The specific embodiment
Below in conjunction with accompanying drawing explanation 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 following step is poly-:
1) raw ore feeds by primary grinding machine and one section of one section of closed circuit grinding operation that grader forms, and the overflow of this section of grader feeds magnetic separator in a section,
2) in one section described in, one section of mine tailing of magnetic separator feeds one section of strong magnetic separator, in one section, in one of magnetic separator section, the bulk concentrate of one section of high intensity magnetic mineral of magnetic concentrate and one section of strong magnetic separator feeds two sections of closed circuit grinding operations, the mine tailing of one section of strong magnetic separator is thrown tail
3) two sections of described closed circuit grinding operations are comprised of two sections of graders and secondary grinding machine, through two sections strong magnetic operations, throw tail, then jettisoning mine tailing,
It is characterized in that:
4) overflow of two sections of described graders feeds magnetic separator in two sections, selects in two sections magnetic tail ore deposit in magnetic concentrate and two sections,
5) magnetic concentrate feeds permanent magnetic separator and selects permanent magnetism concentrate and permanent magnetism mine tailing in described two sections, and magnetic tail ore deposit feeds two sections of strong magnetic separators in described two sections, selects two sections of high intensity magnetic minerals and two sections of strong magnetic tail ore deposits,
6) described permanent magnetism concentrate feeds Magnetic field screening separator and selects Magnetic field screening separator concentrate and Magnetic field screening separator mine tailing,
7) described Magnetic field screening separator concentrate feeds column magnetic separator and selects magnetic concentrate and column magnetic separator mine tailing,
8) described permanent magnetism mine tailing, Magnetic field screening separator mine tailing, column magnetic separator mine tailing and two sections of high intensity magnetic minerals mixing feed flotation operation after concentrated, the flotation concentrate of selecting and flotation tailing,
9) described column magnetic separator is selected column magnetic separator concentrate and flotation concentrate are final concentrate,
10) mine tailing of one section of described strong magnetic, two sections of strong magnetic tail ore deposits and flotation tailing are true tailings.
Embodiment
Head grade is that 18～30% hematite feeds one section of closed circuit grinding, is milled to-200 order grain size contents in one section of Grading Overflow and reaches 50～70%.One section of Grading Overflow magnetic separator operation in a section (magnetic induction intensity is 0.2～0.4T) and one section of strong magnetic separator (background lectromagnetism field 0.6～1.2T) are thrown tail, jettisoning grade is 7～9% mine tailing, grade is that 35～45% concentrate feeds two sections of closed circuit grindings, being milled to-200 order grain size contents in two sections of Grading Overflows reaches more than 90%, two sections of Grading Overflows feed magnetic separator operation in two sections (magnetic induction intensity is 0.2～0.4T) and two sections of strong magnetic separators (background lectromagnetism field 12000 Oe) throwing tail, jettisoning grade is 8～10% mine tailing, in two sections, magnetic concentrate is through permanent magnetic separator (magnetic induction intensity is 0.1～0.2T), Magnetic field screening separator, column magnetic separator is selected the more than 65% column magnetic separator concentrate of grade, permanent-magnet concentration mine tailing, Magnetic field screening separator mine tailing, after column magnetic separator mine tailing and two sections of high intensity magnetic minerals mix, (grade is 30～40%) feeds flotation operation after concentrated, select the flotation tailing that more than 65% flotation concentrate of grade and grade are 13～18%.Column magnetic separator concentrate and flotation concentrate are final concentrate, and grade is more than 65%.One section of strong magnetic tail ore deposit, two sections of 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, by the method for magnetic separation, select the more than 65% qualified concentrate of grade, reduce the ore deposit amount that enters flotation operation, both guarantee the more than 65% high-grade final concentrate of percentage by weight, also reduced beneficiation cost.
Claims (1)
1. bloodstone stage grinding, magnetic separation-floatation process, comprise that following step is poly-:
1) raw ore feeds by primary grinding machine and one section of one section of closed circuit grinding operation that grader forms, and the overflow of this section of grader feeds magnetic separator in a section,
2) in one section described in, one section of mine tailing of magnetic separator feeds one section of strong magnetic separator, in one section, in one of magnetic separator section, the bulk concentrate of one section of high intensity magnetic mineral of magnetic concentrate and one section of strong magnetic separator feeds two sections of closed circuit grinding operations, the mine tailing of one section of strong magnetic separator is thrown tail
3) two sections of described closed circuit grinding operations are comprised of two sections of graders and secondary grinding machine,
It is characterized in that:
4) overflow of two sections of described graders feeds magnetic separator in two sections, selects in two sections magnetic tail ore deposit in magnetic concentrate and two sections,
5) magnetic concentrate feeds permanent magnetic separator and selects permanent magnetism concentrate and permanent magnetism mine tailing in described two sections, and magnetic tail ore deposit feeds two sections of strong magnetic separators in described two sections, selects two sections of high intensity magnetic minerals and two sections of strong magnetic tail ore deposits, through two sections strong magnetic operations, throws tails,
6) described permanent magnetism concentrate feeds Magnetic field screening separator and selects Magnetic field screening separator concentrate and Magnetic field screening separator mine tailing,
7) described Magnetic field screening separator concentrate feeds column magnetic separator and selects column magnetic separator concentrate and column magnetic separator mine tailing,
8) described permanent magnetism mine tailing, Magnetic field screening separator mine tailing, column magnetic separator mine tailing and two sections of high intensity magnetic minerals mixing feed flotation operation after concentrated, the flotation concentrate of selecting and flotation tailing,
9) described column magnetic separator is selected column magnetic separator concentrate and flotation concentrate are final concentrate,
10) mine tailing of one section of described strong magnetic, two sections of strong magnetic tail ore deposits and flotation tailing are true tailings.
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| CN103586146B (en) * | 2013-11-13 | 2015-05-13 | 鞍钢集团矿业公司 | Mineral processing process for processing mixed ore of magnetic iron ore and hematite-limonite ore |
| CN104888947B (en) * | 2015-06-12 | 2016-11-23 | 鞍钢集团矿业公司 | The magnetic separation of fine grain teeth cloth magnetic-red composite ore-centrifuge sorting process |
| CN104888960B (en) * | 2015-06-12 | 2017-03-01 | 鞍钢集团矿业有限公司 | The magnetic of the red composite ore of fine grain teeth cloth magnetic floats sorting process |
| CN104959228B (en) * | 2015-07-24 | 2017-01-18 | 段风梅 | Lean magnetite beneficiation method capable of reducing fineness of grinding ore |
| 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 |
| 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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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102019228A (en) * | 2009-09-18 | 2011-04-20 | 鞍钢集团矿业公司 | Ultra-lean hematite dressing process |
| CN102284359A (en) * | 2011-08-08 | 2011-12-21 | 鞍钢集团矿业公司 | Process for roasting, stage grinding, coarse-fine grading and reselection-magnetic separation of hematite |
| 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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| BRPI0504385B1 (en) * | 2005-10-17 | 2017-06-13 | Vale S.A. | PROCESS OF ENRICHMENT OF MECHANICAL CONCENTRATES OF ANATASIO FOR THE OBTAINMENT OF SYNTHETIC RULE WITH LOW RARE LAND AND RADIOACTIVE ELEMENTS |
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| Publication number | Priority date | Publication date | Assignee | Title |
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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 |
| CN102284359A (en) * | 2011-08-08 | 2011-12-21 | 鞍钢集团矿业公司 | Process for roasting, stage grinding, coarse-fine grading and reselection-magnetic separation of hematite |
| 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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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 |