CN102553707A - Process for separating lean-magnetite fine ore - Google Patents
Process for separating lean-magnetite fine ore Download PDFInfo
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- CN102553707A CN102553707A CN2012100704091A CN201210070409A CN102553707A CN 102553707 A CN102553707 A CN 102553707A CN 2012100704091 A CN2012100704091 A CN 2012100704091A CN 201210070409 A CN201210070409 A CN 201210070409A CN 102553707 A CN102553707 A CN 102553707A
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Abstract
A process for separating lean-magnetite fine ore is characterized in that raw lean-magnetite ore is fed into a primary closed-loop grinding system and then fed into a primary weak magnetic stage, concentrates from the primary weak magnetic stage are fed into a secondary closed-loop grinding system and then fed into a secondary weak magnetic stage, concentrates from the secondary weak magnetic stage are fed into a fine sieve, products remained on the fine sieve return to the secondary closed-loop grinding system, products sieved from the fine sieve are fed into a reverse-floatation roughing stage, roughed ore is fed into a concentrating stage, tailings from the roughing stage are fed into a primary scavenging stage, concentrates from the concentrating stage is the final concentrate, tailings from the concentrating stage return to the roughing stage, concentrates from the primary scavenging stage return to the roughing stage, tailings from the primary scavenging stage are fed to a secondary scavenging stage, concentrates from the secondary scavenging stage return to the primary scavenging stage, tailings from the secondary scavenging stage are fed into a tertiary scavenging stage, concentrates from the tertiary scavenging stage return to the secondary scavenging stage, the tailings of the tertiary scavenging stage, the tailings from the secondary weak magnetic stage and the tailings from the primary weak magnetic stage are the final tailings to be discarded. The reverse floatation and sieving are combined in the process, so that grinding cost is saved, adverse affection of heavily grinding to separation is reduced, and the problem of ore mixed with magnetite is solved effectively.
Description
Technical field
The present invention relates to the technique of preparing field, particularly a kind of technology that sorts the poor magnetic iron ore of particulate.
Background technology
At present, handle the poor magnetic iron ore of particulate and generally adopt " single magnetic separation-dusting cover is regrinded " technology, promptly the magnetic concentrate that through several sections grind grading-magnetic separation process sort after, obtains of raw ore feeds dusting cover and sorts the grade of raising magnetic concentrate.This technology mainly is to utilize magnetic concentrate in a certain granularity tangible article potential difference to be arranged up and down, sieves away through the dusting cover coarse grain product that grade is low and improves concentrate grade.Adopt this technology to grade after the magnetic concentrate about 64% sorts, to obtain the final concentrate of grade about 68%.But when the magnetic concentrate granularity reached-200 order content 80% in this technology, its iron mineral degree of dissociation just can reach 80%.
Along with iron ore resource is constantly developed, the ore of phase commute choosing reduces gradually, and some poor magnetic iron ores of new exploitation are because its disseminated grain size is superfine at present; Must carry out fine grinding to it, could realize fully dissociating, the superfine poor magnetic iron ore of these disseminated grain sizes is after several sections grind grading-magnetic separation process sort; Its magnetic concentrate granularity must reach-325 orders 90% when above, and its iron mineral degree of dissociation just can reach 80%, because the magnetic concentrate granularity that the poor magnetic iron ore of superfine particle embedding cloth obtains after sorting is superfine; Cause magnetic in the magnetic separation process to be mingled with heavily, the particulate lean intergrowth that is mingled with and gangue can't be removed through dusting cover, thus the magnetic concentrate of this superfine particle only to adopt dusting cover be to improve concentrate grade; And only adopt reverse floatation process, and utilize the difference of reverse flotation mineral floatability to handle the magnetic concentrate of this superfine particle, be mingled with problem though can overcome magnetic; But on the one hand because the grinding particle size that can ask is meticulous; Difficult realization in industry, grinding particle size is meticulous on the other hand causes-10 μ m content higher, influences separating effect; Increased metal loss, the rate of recovery reduces.
Summary of the invention
The purpose of this invention is to provide a kind of technology that sorts the poor magnetic iron ore of particulate that magnetic is mingled with, practices thrift the ore grinding cost that overcomes.
The objective of the invention is to realize through following technical proposals:
The technology that sorts the poor magnetic iron ore of particulate of the present invention; It is characterized in that adopting reverse flotation and dusting cover Combined Treatment superfine particle magnetic concentrate; Abandon the fine-grained gangue and the lean intergrowth that are mingled with in the magnetic concentrate into, reclaim the iron mineral of monomer dissociation effectively, concrete steps are following:
1) the poor magnetic iron ore raw ore of particulate is fed by primary grinding and one section one section closed circuit grinding system that classification is formed, its granularity is a magnetic a little less than the ore discharge of-200 order content 60-70% feeds a section,
2) concentrate of magnetic feeds by secondary grinding and two sections two sections closed circuit grinding systems that classification is formed a little less than one section, its granularity for the ore discharge of-200 order content 90-95% feed two sections a little less than magnetic,
3) concentrate of magnetic feeds dusting cover a little less than two sections,
4) oversize of dusting cover turns back to two sections closed circuit grinding systems, and granularity is roughly selected for the undersize of-325 order content more than 90% feeds reverse flotation,
5) it is selected that the concentrate roughly selected of reverse flotation feeds reverse flotation, and the mine tailing that reverse flotation is roughly selected feeds reverse flotation and sweeps,
6) the selected concentrate of reverse flotation is a final concentrate, and its grade is 65-68%, and the selected mine tailing of reverse flotation turns back to reverse flotation and roughly selects,
7) concentrate that sweeps of reverse flotation turns back to reverse flotation and roughly selects, and the mine tailing that reverse flotation sweeps feeds reverse flotation two and sweeps,
8) concentrate swept of reverse flotation two turns back to reverse flotation and sweeps, and the mine tailing that reverse flotation two is swept feeds reverse flotation three and sweeps,
9) concentrate swept of reverse flotation three turns back to reverse flotation two and sweeps, a little less than the mine tailing that reverse flotation three is swept, two sections a little less than the mine tailing of magnetic and one section the mine tailing of magnetic abandon as true tailings together, its grade is 10-15%.
Described primary grinding adopts long cartridge type horizontal ball mill.
The characteristics that sort the technology of the poor magnetic iron ore of particulate of the present invention are:
1, adopt dusting cover to guarantee that through-screen size reaches-325 orders more than 90%, the iron mineral degree of dissociation reaches more than 80%;
2, adopt secondary grinding to combine with dusting cover; When guaranteeing that undersize iron mineral degree of dissociation reaches more than 80%; Granularity requirements to secondary grinding is lower; Its secondary grinding granularity gets final product at-200 order content 90-95%, has both practiced thrift the ore grinding cost, can alleviate overground adverse effect to sorting again;
3, adopt reverse floatation process to handle undersize, overcome magnetic effectively and be mingled with problem, obtain high-grade flotation concentrate.
The present invention can also be according to the grade of undersize and the character of ore, and reverse flotation can adopt the technological process of " a thick essence " or " one thick one single-minded sweeping ".
The mode that the present invention adopts reverse flotation to combine with dusting cover is handled the superfine particle magnetic concentrate, has both practiced thrift the ore grinding cost, alleviates overground adverse effect to sorting, and utilizes reverse flotation to overcome magnetic effectively again and is mingled with problem, for obtaining the high-grade concentrate assurance is provided.
Description of drawings
Fig. 1 is a process chart of the present invention.
The specific embodiment
Below in conjunction with the description of drawings specific embodiment of the present invention.
As shown in Figure 1; The technology that sorts the poor magnetic iron ore of particulate of the present invention is characterized in that adopting reverse flotation and dusting cover Combined Treatment superfine particle magnetic concentrate, abandons the fine-grained gangue and the lean intergrowth that are mingled with in the magnetic concentrate into; Reclaim the iron mineral of monomer dissociation effectively, concrete steps are following:
1) the poor magnetic iron ore raw ore of particulate is fed by primary grinding and one section one section closed circuit grinding system that classification is formed, its granularity is a magnetic a little less than the ore discharge of-200 order content 60-70% feeds a section, and primary grinding adopts long cartridge type horizontal ball mill,
2) concentrate of magnetic feeds by secondary grinding and two sections two sections closed circuit grinding systems that classification is formed a little less than one section, its granularity for the ore discharge of-200 order content 90-95% feed two sections a little less than magnetic,
3) concentrate of magnetic feeds dusting cover a little less than two sections,
4) oversize of dusting cover turns back to two sections closed circuit grinding systems, and granularity is roughly selected for the undersize of-325 order content more than 90% feeds reverse flotation,
5) it is selected that the concentrate roughly selected of reverse flotation feeds reverse flotation, and the mine tailing that reverse flotation is roughly selected feeds reverse flotation and sweeps,
6) the selected concentrate of reverse flotation is a final concentrate, and its grade is 65-68%, and the selected mine tailing of reverse flotation turns back to reverse flotation and roughly selects,
7) concentrate that sweeps of reverse flotation turns back to reverse flotation and roughly selects, and the mine tailing that reverse flotation sweeps feeds reverse flotation two and sweeps,
8) concentrate swept of reverse flotation two turns back to reverse flotation and sweeps, and the mine tailing that reverse flotation two is swept feeds reverse flotation three and sweeps,
9) concentrate swept of reverse flotation three turns back to reverse flotation two and sweeps, a little less than the mine tailing that reverse flotation three is swept, two sections a little less than the mine tailing of magnetic and one section the mine tailing of magnetic abandon as true tailings together, its grade is 10-15%.
The mode that the present invention adopts reverse flotation to combine with dusting cover is handled the superfine particle magnetic concentrate, has both practiced thrift the ore grinding cost, alleviates overground adverse effect to sorting, and utilizes reverse flotation to overcome magnetic effectively again and is mingled with problem, for obtaining the high-grade concentrate assurance is provided.
Claims (2)
1. technology that sorts the poor magnetic iron ore of particulate; It is characterized in that adopting reverse flotation and dusting cover Combined Treatment superfine particle magnetic concentrate; Abandon the fine-grained gangue and the lean intergrowth that are mingled with in the magnetic concentrate into, reclaim the iron mineral of monomer dissociation effectively, concrete steps are following:
1) the poor magnetic iron ore raw ore of particulate is fed by primary grinding and one section one section closed circuit grinding system that classification is formed, its granularity is a magnetic a little less than the ore discharge of-200 order content 60-70% feeds a section,
2) concentrate of magnetic feeds by secondary grinding and two sections two sections closed circuit grinding systems that classification is formed a little less than one section, its granularity for the ore discharge of-200 order content 90-95% feed two sections a little less than magnetic,
3) concentrate of magnetic feeds dusting cover a little less than two sections,
4) oversize of dusting cover turns back to two sections closed circuit grinding systems, and granularity is roughly selected for the undersize of-325 order content more than 90% feeds reverse flotation,
5) it is selected that the concentrate roughly selected of reverse flotation feeds reverse flotation, and the mine tailing that reverse flotation is roughly selected feeds reverse flotation and sweeps,
6) the selected concentrate of reverse flotation is a final concentrate, and its grade is 65-68%, and the selected mine tailing of reverse flotation turns back to reverse flotation and roughly selects,
7) concentrate that sweeps of reverse flotation turns back to reverse flotation and roughly selects, and the mine tailing that reverse flotation sweeps feeds reverse flotation two and sweeps,
8) concentrate swept of reverse flotation two turns back to reverse flotation and sweeps, and the mine tailing that reverse flotation two is swept feeds reverse flotation three and sweeps,
9) concentrate swept of reverse flotation three turns back to reverse flotation two and sweeps, a little less than the mine tailing that reverse flotation three is swept, two sections a little less than the mine tailing of magnetic and one section the mine tailing of magnetic abandon as true tailings together, its grade is 10-15%.
2. the technology that sorts the poor magnetic iron ore of particulate according to claim 1 is characterized in that described primary grinding adopts long cartridge type horizontal ball mill.
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| CN2012100704091A CN102553707A (en) | 2012-03-17 | 2012-03-17 | Process for separating lean-magnetite fine ore |
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Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103934097A (en) * | 2014-04-08 | 2014-07-23 | 东北大学 | Method for purification of iron ores in deep ore body |
| CN104148172A (en) * | 2014-07-28 | 2014-11-19 | 鞍钢集团矿业公司 | Respective grinding and strong magnetic-reverse flotation recovery process of hematite tailings |
| CN104148175A (en) * | 2014-08-08 | 2014-11-19 | 西北矿冶研究院 | Mineral processing technology for processing mixed diamond and magnetic ore |
| CN104785367A (en) * | 2015-04-03 | 2015-07-22 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Mineral separation method for pre-extraction of concentrates from roasted iron ore |
| CN106423533A (en) * | 2016-10-14 | 2017-02-22 | 鞍钢集团矿业有限公司 | Poor hematite high-pressure roller grinding, roughness and fineness classification and reselection-magnetic separation-reverse flotation technology |
| CN106423534A (en) * | 2016-10-14 | 2017-02-22 | 鞍钢集团矿业有限公司 | Poor hematite high pressure roller milling, thickness grading and reselection-magnetic separation-centrifugal machine sorting process |
| 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 |
| 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 |
| CN108554629A (en) * | 2018-03-29 | 2018-09-21 | 安徽马钢张庄矿业有限责任公司 | Silicon ore-dressing technique drops in Iron concentrate upgrading |
| CN108816497A (en) * | 2018-06-15 | 2018-11-16 | 魏建民 | Magnetite beneficiation process |
| 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 |
| CN110465404A (en) * | 2018-05-09 | 2019-11-19 | 中国瑞林工程技术有限公司 | The method for handling carbonate containing iron selection tailings |
| CN110479468A (en) * | 2019-08-28 | 2019-11-22 | 马钢集团设计研究院有限责任公司 | A kind of pre-selection technique of chromium depleted zone stone |
| CN111151370A (en) * | 2020-01-13 | 2020-05-15 | 周伟永 | Production method of high-quality ultra-pure fine iron powder |
| CN112090578A (en) * | 2020-09-09 | 2020-12-18 | 中钢集团马鞍山矿山研究总院股份有限公司 | Beneficiation method for preparing ultrapure iron concentrate by using magnetite concentrate |
| CN114798133A (en) * | 2022-04-11 | 2022-07-29 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Method for improving production capacity of ore mill |
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Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103934097A (en) * | 2014-04-08 | 2014-07-23 | 东北大学 | Method for purification of iron ores in deep ore body |
| CN103934097B (en) * | 2014-04-08 | 2016-08-31 | 东北大学 | A kind of method of purification of deep orebody iron ore |
| CN104148172A (en) * | 2014-07-28 | 2014-11-19 | 鞍钢集团矿业公司 | Respective grinding and strong magnetic-reverse flotation recovery process of hematite tailings |
| CN104148175A (en) * | 2014-08-08 | 2014-11-19 | 西北矿冶研究院 | Mineral processing technology for processing mixed diamond and magnetic ore |
| CN104785367A (en) * | 2015-04-03 | 2015-07-22 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Mineral separation method for pre-extraction of concentrates from roasted iron ore |
| 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 |
| 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 |
| CN106423533A (en) * | 2016-10-14 | 2017-02-22 | 鞍钢集团矿业有限公司 | Poor hematite high-pressure roller grinding, roughness and fineness classification and reselection-magnetic separation-reverse flotation technology |
| CN106423534A (en) * | 2016-10-14 | 2017-02-22 | 鞍钢集团矿业有限公司 | Poor hematite high pressure roller milling, thickness grading and reselection-magnetic separation-centrifugal machine sorting process |
| 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 |
| CN108554629A (en) * | 2018-03-29 | 2018-09-21 | 安徽马钢张庄矿业有限责任公司 | Silicon ore-dressing technique drops in Iron concentrate upgrading |
| CN110465404A (en) * | 2018-05-09 | 2019-11-19 | 中国瑞林工程技术有限公司 | The method for handling carbonate containing iron selection tailings |
| CN108816497B (en) * | 2018-06-15 | 2020-05-19 | 魏建民 | Magnetite beneficiation process |
| CN108816497A (en) * | 2018-06-15 | 2018-11-16 | 魏建民 | Magnetite beneficiation process |
| 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 |
| CN110479468A (en) * | 2019-08-28 | 2019-11-22 | 马钢集团设计研究院有限责任公司 | A kind of pre-selection technique of chromium depleted zone stone |
| CN111151370A (en) * | 2020-01-13 | 2020-05-15 | 周伟永 | Production method of high-quality ultra-pure fine iron powder |
| CN112090578A (en) * | 2020-09-09 | 2020-12-18 | 中钢集团马鞍山矿山研究总院股份有限公司 | Beneficiation method for preparing ultrapure iron concentrate by using magnetite concentrate |
| CN114798133A (en) * | 2022-04-11 | 2022-07-29 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Method for improving production capacity of ore mill |
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Application publication date: 20120711 |