CN104888947B - The magnetic separation of fine grain teeth cloth magnetic-red composite ore-centrifuge sorting process - Google Patents
The magnetic separation of fine grain teeth cloth magnetic-red composite ore-centrifuge sorting process Download PDFInfo
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Abstract
The present invention relates to the magnetic separation centrifuge sorting process of the red composite ore of a kind of fine grain teeth cloth magnetic, it is characterized in that using wet type Semi-Autogenous, stage grinding, stage weak magnetic strength magnetic, strong magnetic essence centrifuge " sorting operation system, the invention have the advantage that employing wet self-grinding technique, decrease crushing operation, the method of employing stage mill staged magnetic separation, the vignite that can be up to monomer dissociation uses the method for single magnetic separation to reclaim in advance, realize early throwing the iron mineral of monomer early receiving, cost efficiency, the mineral avoiding monomer dissociation enter next section of operation, centrifuge is used to sort, technological process is short, equipment is simple, easily operation, free from environmental pollution, energy-saving and cost-reducing.
Description
Technical field
The invention belongs to iron ore beneficiation technical field, particularly a kind of micro-Fine-grained disseminated grain magnetic-red composite ore
Magnetic separation
-
Centrifuge sorting process.
Background technology
In recent years, domestic sorting for poor iron ore is successfully employed " Continuous Grinding, weak magnetic-strong magnetic-the moon reverse flotation ", " stage grinding, weak magnetic-strong magnetic-anion reverse floatation ", " stage grinding, thickness grading; middling ore regrinding; weight magnetic reverse flotation ", " Continuous Grinding; thickness grading, middling ore regrinding, weight magnetic reverse flotation ", " three sections of ore grindings; stage weak magnetic strength magnetic reverse flotation " technique, selects factory's popularization and application at Anshan iron and steel plant and domestic other respectively.
What this several flow processs used is raw ore after three sections of crushing and screenings, and under sieve ,-12 millimeters of products enter grinding operation, sort, it is thus achieved that the concentrate of acceptable quality after the grinding particle size required for being milled to." Continuous Grinding, weak magnetic-strong magnetic-the moon reverse flotation ", " stage grinding, weak magnetic-strong magnetic-anion reverse floatation ", " three sections of ore grindings, stage weak magnetic strength magnetic reverse flotation " technological processIn,Flotation concentrate is final concentrate；" stage grinding, thickness grading, middling ore regrinding, weight magnetic reverse flotation ", " Continuous Grinding, thickness grading, middling ore regrinding, weight magnetic reverse flotation " technological processIn, gravity concentrate and flotation concentrate are combined into final concentrate.
With deeply developing of Mineral Resources in China, major part mine will enter the deep mining stage, will appear from the ecotone of magnetic iron ore and bloodstone, and what ore dressing faced is sorting of the red composite ore of magnetic, and wherein magnetic iron ore and the ratio of bloodstone are at about 4:6.
For example: " three sections of ore grindings, stage weak magnetic-strong magnetic-reverse flotation " technological process that fine-grained disseminated grain iron ore generally uses sorts, and Beneficiation flowsheet is shown in Fig. 1.
Original ore size 0-12mm, through two sections of Continuous Grindings, granularity reaches-200 mesh content more than 80%, after one section of weak magnetic strength magnetic separation, by mixed magnetic concentrate regrinding, granularity reaches-325 mesh content 85%～90%, then after second segment weak magnetic strength magnetic separation, secondary mixes magnetic concentrate and feeds reverse flotation work, reverse flotation work be one section roughly select, one section selected, three sections scan closed circuit floatation process.
In this technique, after one section of mixed magnetic concentrate regrinding, granularity reaches-325 mesh 85%～90%, this grinding particle size product there is a certain amount of magnetic ore deposit sufficiently achieved monomer dissociation, qualified grade magnetic concentrate can be obtained through magnetic separation, but the magnetic iron ore that part contained in ore in flow process has reached monomer dissociation enters in reverse flotation work, make flotation operation Chinese medicine consumption big, i.e. add the treating capacity of flotation operation, add again floating agent dosage and beneficiation cost, causing appearance part not have the particulate magnetic ore deposit of abundant mineralising to enter in flotation operation mine tailing causes tailings grade higher, the drawbacks such as metal loss is bigger, flotation operation also can cause environmental pollution simultaneously.
Content of the invention
It is an object of the invention to provide the magnetic separation centrifuge sorting process of the red composite ore of a kind of fine grain teeth cloth magnetic, use wet self-grinding technique, decrease crushing operation, the method of employing stage mill staged magnetic separation, the vignite that can be up to monomer dissociation uses the method for single magnetic separation to reclaim in advance, realize early throwing the iron mineral of monomer early receiving, cost efficiency, the mineral avoiding monomer dissociation enter next section of operation, centrifuge is used to sort, technological process is short, equipment is simple, easily operation, free from environmental pollution, energy-saving and cost-reducing.
It is an object of the invention to be realized by following technical proposals:
A kind of magnetic separation centrifuge sorting process of the red composite ore of fine grain teeth cloth magnetic of the present invention, it is characterised in that: use wet type Semi-Autogenous, stage grinding, stage weak magnetic-strong magnetic, strong magnetic essence-from
Scheming sorting operation system, specifically comprises the following steps that
A) grade be 31%～33%, Armco magnetic iron content be 40%～60%, granularity be below 300mm raw ore through ore pocket feed wet type Semi-Autogenous-screening operation, its undersize degree feeds one section of closed circuit grinding classification system for-3mm product and carries out primary grinding and classification process, and oversize returns that wet type is Semi-Autogenous regrinds；
B) sand setting after one section of closed circuit grinding classification returns one section of closed circuit grinding classification system and regrinds, and after one section of closed circuit grinding classification, granularity reaches the overflow of-200 mesh more than 85% and feeds one section of low intensity magnetic separation operation；
C) mine tailing of one section of low intensity magnetic separation operation feeds one section of high intensity magnetic separation operation, one section of low intensity magnetic separation operation concentrate and one section of high intensity magnetic separation operation concentrate are combined into mixed magnetic concentrate, grade is 40% ~ 42%, productivity is 70% ~ 72%, mixed magnetic concentrate feeds two sections of closed circuit grinding classification operations, two sections of Grading Overflow granularities reach-325 mesh 90%～95%, and the sand setting after two sections of closed circuit grinding classifications returns two sections of closed circuit grinding classification systems and regrinds；
D) granularity reaches two sections of Grading Overflows of-325 mesh 90%～95% and feeds two sections of low intensity magnetic separation operations, sort out two sections of inferior fine magnetite concentrates and two sections of weakly magnetic tailingses, the grade of its two sections of inferior fine magnetite concentrates is 62.5%～63%, two sections of inferior fine magnetite concentrates are fed three sections of low intensity magnetic separation operations, sort out three sections of inferior fine magnetite concentrates and three sections of weakly magnetic tailingses, the grade of its three sections of inferior fine magnetite concentrates is 64.5%～65%, three sections of inferior fine magnetite concentrates are fed four sections of low intensity magnetic separation operations, sort out four sections of inferior fine magnetite concentrates and four sections of weakly magnetic tailingses, the grade of its four sections of inferior fine magnetite concentrates is 65%～65.5%, productivity 15%～20%, two sections of weakly magnetic tailingses, three sections of weakly magnetic tailingses and four sections of weakly magnetic tailingses feed two sections of high intensity magnetic separation operations in the lump；
The product that two sections of Grading Overflow granularities reach-325 mesh 90%～95% feeds two sections of low intensity magnetic separation operations, the concentrate grade 62.5% ~ 63% of two sections of low intensity magnetic separation operations, the concentrate of two sections of low intensity magnetic separation operations feeds three sections of low intensity magnetic separation operations, the concentrate grade of three sections of low intensity magnetic separation operations is 64.5% ~ 65%, the concentrate of three sections of low intensity magnetic separation operations feeds four sections of low intensity magnetic separation operations, after four stage magnetic separator sort, it is thus achieved that grade 65% ~ 65.5%, the inferior fine magnetite concentrate of productivity 15%～20%；Two sections of low intensity magnetic separation operation mine tailings, three sections of low intensity magnetic separation operation mine tailings and four sections of low intensity magnetic separation operation mine tailings feed two sections of high intensity magnetic separation operations in the lump, and sorting out grade is 45.20% ~ 46% 2 section of high intensity magnetic separation concentrate, and two sections of high intensity magnetic separation concentrate feed centrifuge sorting operation,
E) two sections of high intensity magnetic separation concentrate feed centrifuge sorting operation, described centrifuge sorting operation uses one section and roughly selects centrifuge, one section of selected centrifuge and one section scan the closed circuit Beneficiation flowsheet of centrifuge, one section of concentrate roughly selecting centrifuge feeds one section of selected centrifuge, one section of mine tailing roughly selecting centrifuge feeds one section and scans centrifuge, the concentrate of one section of selected centrifuge and magnetic concentrate are combined into final concentrate, its grade is 65%～65.5%, productivity is 35%-40%, the mine tailing of one section of selected centrifuge returns one section and roughly selects centrifuge, one section of concentrate scanning centrifuge returns one section and roughly selects centrifuge, one section of mine tailing scanning centrifuge and one section of high intensity magnetic separation operation mine tailing, two sections of high intensity magnetic separation operation mine tailings are combined into true tailings, its grade is 13%～14%, productivity is 65%～60%.
The invention have the advantage that
1) due to present invention process have employed wet type Semi-Autogenous-sieving technology, in decreasing, thin broken operation；
2) present invention have employed mill stage, choosing stage in process, and the method for single magnetic separation reclaims the magnetic ore deposit of monomer dissociation in advance.Contain a certain amount of magnetic ore deposit mainly due to fine grain teeth cloth magnetic iron ore in bloodstone composite ore, when the magnetic ore deposit in mineral reaches monomer dissociation, use the method for single magnetic separation, can the pre-dressing rate of output 15%～20%, the magnetic iron ore of grade 65%, significantly reduce subsequent job mine-supplying quantity；
3) using centrifuge to sort, compared with reverse flotation, decreasing the link made up a prescription of flotation, decrease environmental pollution, it is to avoid the easy wave phenomenon of flotation operation, and technological process is short, technique is simple, easily operate, energy-saving and cost-reducing.
Brief description
Fig. 1 is former three sections of ore grindings, stage weak magnetic, Qiang Ci, anion reverse floatation process chart.
Fig. 2 is the magnetic separation-centrifuge sorting process flow chart of the fine grain teeth cloth magnetic-red composite ore of the present invention.
Detailed description of the invention
Further illustrate the detailed description of the invention of the present invention below in conjunction with the accompanying drawings.
AsFigure 2 Shown in, the magnetic separation-centrifuge sorting process of a kind of fine grain teeth cloth magnetic-red composite ore of the present invention, it is characterised in that: use wet type Semi-Autogenous, stage grinding, stage weak magnetic-strong magnetic, Qiang Ci
Essence-centrifuge sorting operation system, specifically comprises the following steps that
A) grade be 31%～33%, Armco magnetic iron content be 40%～60%, granularity be below 300mm raw ore through ore pocket feed wet type Semi-Autogenous-screening operation, its undersize degree feeds one section of closed circuit grinding classification system for-3mm product and carries out primary grinding and classification process, and oversize returns that wet type is Semi-Autogenous regrinds；
B) sand setting after one section of closed circuit grinding classification returns one section of closed circuit grinding classification system and regrinds, and after one section of closed circuit grinding classification, granularity reaches the overflow of-200 mesh more than 85% and feeds one section of low intensity magnetic separation operation；
C) mine tailing of one section of low intensity magnetic separation operation feeds one section of high intensity magnetic separation operation, one section of low intensity magnetic separation operation concentrate and one section of high intensity magnetic separation operation concentrate are combined into mixed magnetic concentrate, grade is 40% ~ 42%, productivity is 70% ~ 72%, mixed magnetic concentrate feeds two sections of closed circuit grinding classification operations, two sections of Grading Overflow granularities reach-325 mesh 90%～95%, and the sand setting after two sections of closed circuit grinding classifications returns two sections of closed circuit grinding classification systems and regrinds；
D) granularity reaches two sections of Grading Overflows of-325 mesh 90%～95% and feeds two sections of low intensity magnetic separation operations, sort out two sections of inferior fine magnetite concentrates and two sections of weakly magnetic tailingses, the grade of its two sections of inferior fine magnetite concentrates is 62.5%～63%, two sections of inferior fine magnetite concentrates are fed three sections of low intensity magnetic separation operations, sort out three sections of inferior fine magnetite concentrates and three sections of weakly magnetic tailingses, the grade of its three sections of inferior fine magnetite concentrates is 64.5%～65%, three sections of inferior fine magnetite concentrates are fed four sections of low intensity magnetic separation operations, sort out four sections of inferior fine magnetite concentrates and four sections of weakly magnetic tailingses, the grade of its four sections of inferior fine magnetite concentrates is 65%～65.5%, productivity 15%～20%, two sections of weakly magnetic tailingses, three sections of weakly magnetic tailingses and four sections of weakly magnetic tailingses feed two sections of high intensity magnetic separation operations in the lump；
The product that two sections of Grading Overflow granularities reach-325 mesh 90%～95% feeds two sections of low intensity magnetic separation operations, the concentrate grade 62.5% ~ 63% of two sections of low intensity magnetic separation operations, the concentrate of two sections of low intensity magnetic separation operations feeds three sections of low intensity magnetic separation operations, the concentrate grade of three sections of low intensity magnetic separation operations is 64.5% ~ 65%, the concentrate of three sections of low intensity magnetic separation operations feeds four sections of low intensity magnetic separation operations, after four stage magnetic separator sort, it is thus achieved that grade 65% ~ 65.5%, the inferior fine magnetite concentrate of productivity 15%～20%；Two sections of low intensity magnetic separation operation mine tailings, three sections of low intensity magnetic separation operation mine tailings and four sections of low intensity magnetic separation operation mine tailings feed two sections of high intensity magnetic separation operations in the lump, and sorting out grade is 45.20% ~ 46% 2 section of high intensity magnetic separation concentrate, and two sections of high intensity magnetic separation concentrate feed centrifuge sorting operation.
Use wet self-grinding technique, decrease crushing operation, the method of employing stage mill staged magnetic separation, the vignite that can be up to monomer dissociation uses the method for single magnetic separation to reclaim in advance, realize early throwing the iron mineral of monomer early receiving, cost efficiency, it is to avoid the mineral of monomer dissociation enter next section of operation.
E) two sections of high intensity magnetic separation concentrate feed centrifuge sorting operation, described centrifuge sorting operation uses one section and roughly selects centrifuge, one section of selected centrifuge and one section scan the closed circuit Beneficiation flowsheet of centrifuge, one section of concentrate roughly selecting centrifuge feeds one section of selected centrifuge, one section of mine tailing roughly selecting centrifuge feeds one section and scans centrifuge, the concentrate of one section of selected centrifuge and magnetic concentrate are combined into final concentrate, its grade is 65%～65.5%, productivity is 35%-40%, the mine tailing of one section of selected centrifuge returns one section and roughly selects centrifuge, one section of concentrate scanning centrifuge returns one section and roughly selects centrifuge, one section of mine tailing scanning centrifuge and one section of high intensity magnetic separation operation mine tailing, two sections of high intensity magnetic separation operation mine tailings are combined into true tailings, its grade is 13%～14%, productivity is 65%～60%.
Using centrifuge to sort, compared with reverse flotation, decreasing the link made up a prescription of flotation, decrease environmental pollution, it is to avoid the easy wave phenomenon of flotation operation, and technological process is short, technique is simple, easily operate, energy-saving and cost-reducing.
Claims (1)
1. the magnetic separation of fine grain teeth cloth magnetic-red composite ore-centrifuge sorting process, it is characterised in that:
Use wet type Semi-Autogenous, stage grinding, stage weak magnetic-strong magnetic, strong magnetic essence-centrifuge sorting operation system, specifically comprise the following steps that
A) grade be 31%～33%, Armco magnetic iron content be 40%～60%, granularity be below 300mm raw ore through ore pocket feed wet type Semi-Autogenous-screening operation, its undersize degree feeds one section of closed circuit grinding classification system for-3mm product and carries out primary grinding and classification process, and oversize returns that wet type is Semi-Autogenous regrinds；
B) sand setting after one section of closed circuit grinding classification returns one section of closed circuit grinding classification system and regrinds, and after one section of closed circuit grinding classification, granularity reaches the overflow of-200 mesh more than 85% and feeds one section of low intensity magnetic separation operation；
C) mine tailing of one section of low intensity magnetic separation operation feeds one section of high intensity magnetic separation operation, one section of low intensity magnetic separation operation concentrate and one section of high intensity magnetic separation operation concentrate are combined into mixed magnetic concentrate, grade is 40% ~ 42%, productivity is 70% ~ 72%, mixed magnetic concentrate feeds two sections of closed circuit grinding classification operations, two sections of Grading Overflow granularities reach-325 mesh 90%～95%, and the sand setting after two sections of closed circuit grinding classifications returns two sections of closed circuit grinding classification systems and regrinds；
D) granularity reaches two sections of Grading Overflows of-325 mesh 90%～95% and feeds two sections of low intensity magnetic separation operations, sort out two sections of inferior fine magnetite concentrates and two sections of weakly magnetic tailingses, the grade of its two sections of inferior fine magnetite concentrates is 62.5%～63%, two sections of inferior fine magnetite concentrates are fed three sections of low intensity magnetic separation operations, sort out three sections of inferior fine magnetite concentrates and three sections of weakly magnetic tailingses, the grade of its three sections of inferior fine magnetite concentrates is 64.5%～65%, three sections of inferior fine magnetite concentrates are fed four sections of low intensity magnetic separation operations, sort out four sections of inferior fine magnetite concentrates and four sections of weakly magnetic tailingses, the grade of its four sections of inferior fine magnetite concentrates is 65%～65.5%, productivity 15%～20%, two sections of weakly magnetic tailingses, three sections of weakly magnetic tailingses and four sections of weakly magnetic tailingses feed two sections of high intensity magnetic separation operations in the lump；
The product that two sections of Grading Overflow granularities reach-325 mesh 90%～95% feeds two sections of low intensity magnetic separation operations, the concentrate grade 62.5% ~ 63% of two sections of low intensity magnetic separation operations, the concentrate of two sections of low intensity magnetic separation operations feeds three sections of low intensity magnetic separation operations, the concentrate grade of three sections of low intensity magnetic separation operations is 64.5% ~ 65%, the concentrate of three sections of low intensity magnetic separation operations feeds four sections of low intensity magnetic separation operations, after four stage magnetic separator sort, it is thus achieved that grade 65% ~ 65.5%, the inferior fine magnetite concentrate of productivity 15%～20%；Two sections of low intensity magnetic separation operation mine tailings, three sections of low intensity magnetic separation operation mine tailings and four sections of low intensity magnetic separation operation mine tailings feed two sections of high intensity magnetic separation operations in the lump, and sorting out grade is 45.20% ~ 46% 2 section of high intensity magnetic separation concentrate, and two sections of high intensity magnetic separation concentrate feed centrifuge sorting operation,
E) two sections of high intensity magnetic separation concentrate feed centrifuge sorting operation, described centrifuge sorting operation uses one section and roughly selects centrifuge, one section of selected centrifuge and one section scan the closed circuit Beneficiation flowsheet of centrifuge, one section of concentrate roughly selecting centrifuge feeds one section of selected centrifuge, one section of mine tailing roughly selecting centrifuge feeds one section and scans centrifuge, the concentrate of one section of selected centrifuge and magnetic concentrate are combined into final concentrate, its grade is 65%～65.5%, productivity is 35%-40%, the mine tailing of one section of selected centrifuge returns one section and roughly selects centrifuge, one section of concentrate scanning centrifuge returns one section and roughly selects centrifuge, one section of mine tailing scanning centrifuge and one section of high intensity magnetic separation operation mine tailing, two sections of high intensity magnetic separation operation mine tailings are combined into true tailings, its grade is 13%～14%, productivity is 65%～60%.
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| CN106216082A (en) * | 2016-08-18 | 2016-12-14 | 鞍钢集团矿业有限公司 | Low-grade Anshan type iron mine composite ore ore-dressing technique |
| CN106492977A (en) * | 2016-10-14 | 2017-03-15 | 鞍钢集团矿业有限公司 | The strong magnetic reverse floatation process of lean hematite high pressure roller mill, weak magnetic |
| CN106513163A (en) * | 2016-10-14 | 2017-03-22 | 鞍钢集团矿业有限公司 | High-pressure rolling and magnetic-gravity separation process for lean hematite |
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| CN108480034A (en) * | 2018-03-07 | 2018-09-04 | 鞍钢集团矿业有限公司 | A kind of method of magnetic-weight combined mineral dressing technology recycling magnetic tailing |
| CN108993756A (en) * | 2018-07-05 | 2018-12-14 | 鞍钢集团矿业有限公司 | Semi-Autogenous pre-selection-the stage grinding of magnetic iron ore-tower grinds magnetic separation process |
| CN112844807A (en) * | 2020-12-21 | 2021-05-28 | 鞍钢集团矿业有限公司 | Magnetic-gravity combined recleaning process for micro-fine particle hematite strong magnetic tailings |
| CN114405675B (en) * | 2021-12-31 | 2023-05-16 | 玉溪大红山矿业有限公司 | Mineral separation process for iron ore mixed ore |
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| RU2198033C2 (en) * | 2000-05-29 | 2003-02-10 | Институт физики им. Л.В. Киренского СО РАН | Electromagnetic separator |
| CN101428248B (en) * | 2008-11-04 | 2011-09-14 | 中钢集团马鞍山矿山研究院有限公司 | Beneficiation method for recycling specularite |
| CN102441481B (en) * | 2011-09-19 | 2013-08-07 | 鞍钢集团矿业公司 | Mineral separation process for magnetic hematite rough concentrates |
| CN102430468B (en) * | 2011-09-19 | 2013-04-17 | 鞍钢集团矿业公司 | Magnetism-gravity combined separation technology for magnetic hematite mixed type rough concentrate |
| CN103272684B (en) * | 2013-06-13 | 2014-11-05 | 鞍钢集团矿业公司 | Hematite stage grinding and magnetic-separation-flotation process |
| 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 |
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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: Anshan Iron & Steel Group Mining Co., Ltd. |