CN102019227B - Stage grinding and high intensity magnetism, gravity separation, negative ion reverse flotation technique for lean hematite - Google Patents
Stage grinding and high intensity magnetism, gravity separation, negative ion reverse flotation technique for lean hematite Download PDFInfo
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- CN102019227B CN102019227B CN 200910187447 CN200910187447A CN102019227B CN 102019227 B CN102019227 B CN 102019227B CN 200910187447 CN200910187447 CN 200910187447 CN 200910187447 A CN200910187447 A CN 200910187447A CN 102019227 B CN102019227 B CN 102019227B
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Abstract
The present invention relates to a lean hematite stage grinding and high intensity magnetism, gravity separation, negative ion reverse flotation technique which includes the following steps of: feeding lean hematite for a first grinding after which a first classification is given; feeding effluence of the first classification under medium intensity magnetism and high intensity magnetism; feeding concentrates into a classification between coarse and fine grits and discarding ore tailings; after the coarse and fine grit classification, feeding the coarse grit products into a coarse snail and fine grit products to concentration; feeding the fine grits from the coarse snail into a fine snail, the fine grits of which are gravity separating fine grits; feeding tailings from the coarse and fine snails into a second classification, the effluence of which goes back to medium intensity magnetism; feeding concentrated underflows into a coarse flotation and discarding the effluents; feeding the fine grits from the coarse flotation into a fine flotation and the tailings into a first sweeping flotation; fine grits from the fine flotation being the fine grits of the flotation and returning the tailings back to the coarse flotation; returning the fine grits from the first sweeping flotation back to the coarse flotation and feeding the tailings into a second sweeping flotation; returning the fine grits from the second sweeping flotation back to the first sweeping flotation and feeding the tailings into a third sweeping flotation; returning the fine grits from the third sweeping flotation back to the second sweeping flotation and discarding the tailings. The technique reduces the work load of the preparation equipment and the cost of mineral separations.
Description
Technical field
The present invention relates to the technique of preparing field, particularly a kind of lean hematite stage grinding and strong magnetic-gravity treatment-anion reverse floatation technique.
Background technology
At present, China's lean hematite adopts stage grinding, thickness grading, gravity treatment-strong magnetic-anion reverse floatation technique more, and scalping overflow (200 order content 60%) is divided into thick, thin two kinds of products through the thickness grading operation.Coarse component through thick spiral shell, sweep two sections operations of spiral shell after, throw tail by weak magnetic, middle magnetic; Fine fraction is thrown tail by middle magnetic, strong magnetic.Because lean hematite Beneficiation Feed Grade continuous decrease is down to 24% by 32% in recent years, has therefore increased the load of preparation equipment, thereby also increased beneficiation cost.
Summary of the invention
The purpose of this invention is to provide a kind of lean hematite stage grinding and strong magnetic-gravity treatment-anion reverse floatation technique that reduces beneficiation cost.
The objective of the invention is to realize by following technical proposals:
A kind of lean hematite stage grinding of the present invention and strong magnetic-gravity treatment-anion reverse floatation technique is characterized in that comprising the steps:
1) at first with grade 22-25%, granularity feeds ore grinding one time for＜12 millimeters lean hematite, is milled to that-200 order grain size contents reach 60% in the scalping overflow,
2) the scalping overflow feeds middle magnetic, and the mine tailing of scalping overflow returns ore grinding one time, and the concentrate of middle magnetic feeds thickness grading, and the mine tailing of middle magnetic feeds strong magnetic,
3) concentrate of strong magnetic feeds thickness grading, and the tailings grade of strong magnetic is＜9%, this strong magnetic tail ore deposit is abandoned,
4) thickness grading is divided into thick, thin two kinds of products, and the coarse grain product of-200 order grain size contents 45-55% feeds thick spiral shell ,-200 order grain size contents〉90% particulate product feed concentrated,
5) concentrate of thick spiral shell feeds smart spiral shell, and the mine tailing of thick spiral shell feeds secondary grading and secondary grinding,
6) concentrate of smart spiral shell is grade〉66% gravity concentrate, the mine tailing of smart spiral shell enters secondary grading and secondary grinding,
7) the secondary grading overflow is back to middle magnetic,
8) the particulate product is after concentrating, and concentration is brought up to more than 45% by 20%, and concentrated underflow enters the rough floatation of reverse flotation, and concentrated overflow is abandoned,
9) concentrate of rough floatation enters cleaner flotation, and the mine tailing of rough floatation enters and sweeps flotation,
10) concentrate of cleaner flotation is flotation concentrate, and the mine tailing of cleaner flotation is back to rough floatation,
11) concentrate that sweeps flotation is back to rough floatation, and the mine tailing that sweeps flotation enters two and sweeps flotation,
12) two concentrate of sweeping flotation are back to and sweep flotation, and two mine tailings of sweeping flotation enter three and sweep flotation,
13) three concentrate of sweeping flotation are back to two and sweep flotation, and three mine tailings of sweeping flotation are abandoned, and the grade of this flotation tailing is 13-14%,
14) gravity concentrate and flotation concentrate are merged into final concentrate, and strong magnetic tail ore deposit, concentrated overflow and flotation tailing are merged into true tailings, and the grade of this true tailings is 9-11%.
Magnetic machine during described middle magnetic adopts, field intensity of magnetic machine is 3000-4000 oersteds in this.
Described strong magnetic adopts strong magnetic machine, and the background lectromagnetism field of strong magnetic machine is 12000-14000 oersteds.
The present invention adopts stage grinding, strong magnetic-gravity treatment-anion reverse floatation new technology, this PROCESS FOR TREATMENT grade is 24% lean hematite, can give full play to the advantage of stage grinding, abandons in a large number low-grade gangue in the corase grind situation, greatly reduce the load of preparation equipment, reduced beneficiation cost.Its key technical indexes can reach concentrate grade 68%, tailings grade 10%, 480 yuan of ton Concentrate costs.Compare with existing stage grinding, thickness grading, gravity treatment-strong magnetic-anion reverse floatation technique, technical indicator is substantially suitable, but the ton Concentrate cost reduces by 20 yuan.
Description of drawings
Fig. 1 is process chart of the present invention.
The specific embodiment
Below in conjunction with embodiment in the accompanying drawing the specific embodiment of the present invention is described.
As shown in Figure 1, a kind of lean hematite stage grinding of the present invention and strong magnetic-gravity treatment-anion reverse floatation technique is characterized in that comprising the steps:
1) at first with grade 22-25%, granularity feeds ore grinding one time for＜12 millimeters lean hematite, is milled to that-200 order grain size contents reach 60% in the scalping overflow,
2) the scalping overflow feeds middle magnetic, and the mine tailing of scalping overflow returns ore grinding one time, and the concentrate of middle magnetic feeds thickness grading, and the mine tailing of middle magnetic feeds strong magnetic,
3) concentrate of strong magnetic feeds thickness grading, and the tailings grade of strong magnetic is＜9%, this strong magnetic tail ore deposit is abandoned,
4) thickness grading is divided into thick, thin two kinds of products, and the coarse grain product of-200 order grain size contents 45-55% feeds thick spiral shell ,-200 order grain size contents〉90% particulate product feed concentrated,
5) concentrate of thick spiral shell feeds smart spiral shell, and the mine tailing of thick spiral shell feeds secondary grading and secondary grinding,
6) concentrate of smart spiral shell is grade〉66% gravity concentrate, the mine tailing of smart spiral shell enters secondary grading and secondary grinding,
7) the secondary grading overflow is back to middle magnetic,
8) the particulate product is after concentrating, and concentration is brought up to more than 45% by 20%, and concentrated underflow enters the rough floatation of reverse flotation, and concentrated overflow is abandoned,
9) concentrate of rough floatation enters cleaner flotation, and the mine tailing of rough floatation enters and sweeps flotation,
10) concentrate of cleaner flotation is flotation concentrate, and the mine tailing of cleaner flotation is back to rough floatation,
11) concentrate that sweeps flotation is back to rough floatation, and the mine tailing that sweeps flotation enters two and sweeps flotation,
12) two concentrate of sweeping flotation are back to and sweep flotation, and two mine tailings of sweeping flotation enter three and sweep flotation,
13) three concentrate of sweeping flotation are back to two and sweep flotation, and three mine tailings of sweeping flotation are abandoned, and the grade of this flotation tailing is 13-14%,
14) gravity concentrate and flotation concentrate are merged into final concentrate, and strong magnetic tail ore deposit, concentrated overflow and flotation tailing are merged into true tailings, and the grade of this true tailings is 9-11%.
Magnetic machine during described middle magnetic adopts, field intensity of magnetic machine is 3000-4000 oersteds in this.
Described strong magnetic adopts strong magnetic machine, and the background lectromagnetism field of strong magnetic machine is 12000-14000 oersteds.
Because this technique is abandoned low-grade gangue in a large number in the corase grind situation, greatly reduce the load of preparation equipment, has guaranteed low cost movement.Take certain ore dressing plant as example: the present concentrate scale of this factory is 2,300,000 tonnages, calculates with this concentrate scale, and a year benefit is about 4,600 ten thousand yuan.
Claims (3)
1. a lean hematite stage grinding and strong magnetic-gravity treatment-anion reverse floatation technique is characterized in that comprising the steps:
1) at first with grade 22-25%, granularity feeds ore grinding one time for＜12 millimeters lean hematite, is milled to that-200 order grain size contents reach 60% in the scalping overflow,
2) the scalping overflow feeds middle magnetic, and the mine tailing of scalping overflow returns ore grinding one time, and the concentrate of middle magnetic feeds thickness grading, and the mine tailing of middle magnetic feeds strong magnetic,
3) concentrate of strong magnetic feeds thickness grading, and the tailings grade of strong magnetic is＜9%, this strong magnetic tail ore deposit is abandoned,
4) thickness grading is divided into thick, thin two kinds of products, and the coarse grain product of-200 order grain size contents 45-55% feeds thick spiral shell ,-200 order grain size contents〉90% particulate product feed concentrated,
5) concentrate of thick spiral shell feeds smart spiral shell, and the mine tailing of thick spiral shell feeds secondary grading and secondary grinding,
6) concentrate of smart spiral shell is grade〉66% gravity concentrate, the mine tailing of smart spiral shell enters secondary grading and secondary grinding,
7) the secondary grading overflow is back to middle magnetic,
8) the particulate product is after concentrating, and concentration is brought up to more than 45% by 20%, and concentrated underflow enters the rough floatation of reverse flotation, and concentrated overflow is abandoned,
9) concentrate of rough floatation enters cleaner flotation, and the mine tailing of rough floatation enters and sweeps flotation,
10) concentrate of cleaner flotation is flotation concentrate, and the mine tailing of cleaner flotation is back to rough floatation,
11) concentrate that sweeps flotation is back to rough floatation, and the mine tailing that sweeps flotation enters two and sweeps flotation,
12) two concentrate of sweeping flotation are back to and sweep flotation, and two mine tailings of sweeping flotation enter three and sweep flotation,
13) three concentrate of sweeping flotation are back to two and sweep flotation, and three mine tailings of sweeping flotation are abandoned, and the grade of this flotation tailing is 13-14%,
14) gravity concentrate and flotation concentrate are merged into final concentrate, and strong magnetic tail ore deposit, concentrated overflow and flotation tailing are merged into true tailings, and the grade of this true tailings is 9-11%.
2. lean hematite stage grinding according to claim 1 and strong magnetic-gravity treatment-anion reverse floatation technique is characterized in that magnetic machine in the described middle magnetic employing, and field intensity of magnetic machine is 3000-4000 oersteds in this.
3. lean hematite stage grinding according to claim 1 and strong magnetic-gravity treatment-anion reverse floatation technique is characterized in that described strong magnetic adopts strong magnetic machine, and the background lectromagnetism field of strong magnetic machine is 12000-14000 oersteds.
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| CN102773150A (en) * | 2011-05-12 | 2012-11-14 | 云南锡业集团（控股）有限责任公司 | Polymetallic (iron, tin and zinc) ore comprehensive recovery beneficiation method |
| CN102284359B (en) * | 2011-08-08 | 2013-03-20 | 鞍钢集团矿业公司 | Process for roasting, stage grinding, coarse-fine grading and reselection-magnetic separation of hematite |
| CN102357408B (en) * | 2011-08-09 | 2013-05-01 | 鞍钢集团矿业公司 | Re-cleaning technology for flotation tailings of fine embedded lean hematite |
| CN102814233A (en) * | 2012-09-20 | 2012-12-12 | 鞍钢集团矿业公司 | Preselecting technology for extremely hungry hematite one-step classifying overflows through high gradient magnetic separator |
| CN102921540A (en) * | 2012-11-16 | 2013-02-13 | 鞍钢集团矿业公司 | Lean hematite processing technology |
| CN103464287B (en) * | 2013-09-05 | 2015-03-11 | 鞍钢集团矿业公司 | Flocculation desliming and acidic flotation method for iron carbonate ore fine-grained products |
| CN103447161B (en) * | 2013-09-05 | 2015-01-07 | 鞍钢集团矿业公司 | Flocculation desliming and alkaline flotation method of high-ferrous ore fine particle products |
| CN103977882A (en) * | 2014-05-23 | 2014-08-13 | 山东华联矿业股份有限公司 | Magnetite concentrate quality-improving impurity-reducing process |
| CN104722393B (en) * | 2015-03-19 | 2017-11-17 | 长沙矿冶研究院有限责任公司 | A kind of beneficiation method for improving the microfine speculum iron rate of recovery |
| CN104759355A (en) * | 2015-04-28 | 2015-07-08 | 中冶北方（大连）工程技术有限公司 | Micro-fine particle hematite greater circulation mine returning negative ion reverse flotation technology |
| CN105521869A (en) * | 2016-02-02 | 2016-04-27 | 大连地拓重工有限公司 | Re-concentration method for hematite combined tailings |
| CN106269177B (en) * | 2016-10-14 | 2018-04-24 | 鞍钢集团矿业有限公司 | Lean hematite thickness grading, gravity treatment-middle magnetic-strong magnetic-reverse floatation process |
| CN108970802B (en) * | 2018-09-20 | 2020-07-28 | 鞍钢集团矿业有限公司 | Stage grinding-magnetic-gravity-floating combined mineral separation process for separating hematite |
| CN109718947B (en) * | 2019-03-20 | 2020-10-09 | 中钢集团马鞍山矿山研究总院股份有限公司 | Magnetic-floating combined beneficiation method for micro-fine particle magnetic-hematite mixed iron ore |
| CN109985723A (en) * | 2019-03-20 | 2019-07-09 | 中钢集团马鞍山矿山研究院有限公司 | A kind of beneficiation method of microfine magnetic-red compound iron ore |
| CN110639690B (en) * | 2019-10-14 | 2021-05-25 | 广东省资源综合利用研究所 | Beneficiation method for high-mud micro-fine particle rare earth minerals |
| CN112588431A (en) * | 2020-12-08 | 2021-04-02 | 鞍钢集团矿业有限公司 | Ore grinding-weak magnetic strong magnetic-gravity separation-reverse flotation process for magnetic hematite |
| CN115921128A (en) * | 2023-01-05 | 2023-04-07 | 鞍钢集团矿业有限公司 | Ore grinding-weak magnetic strong magnetic-coarse grain gravity separation regrinding and fine grain reverse flotation process |
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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 |