CN104148165A - Process for separate grinding and centrifugal recycling of hematite tailings - Google Patents
Process for separate grinding and centrifugal recycling of hematite tailings Download PDFInfo
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- CN104148165A CN104148165A CN201410359179.XA CN201410359179A CN104148165A CN 104148165 A CN104148165 A CN 104148165A CN 201410359179 A CN201410359179 A CN 201410359179A CN 104148165 A CN104148165 A CN 104148165A
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Abstract
The invention discloses a process for separate grinding and centrifugal recycling of hematite tailings. The process is characterized by including: feeding the hematite tailings with grades ranging from 10% to 15% to a roughing spiral chute and a finely-selecting spiral chute, combining the roughing spiral chute tailings with the finely-selecting spiral chute tailings prior to feeding the same to a permanent-magnet machine for scavenging; grinding finely-selecting spiral chute concentrate and permanent-magnetic concentrate by the aid of a closed-circuit grinding system composed of a cyclone and a grinding machine so as to achieve the iron content dissociation degree of 80%; feeding ground products of the permanent-magnetic concentrate into a magnet-weakening machine for grading, and then combining ground products of the finely-selecting spiral chute concrete with the weak-magnetic concentrate for fine selection by the aid of a second-stage centrifugal machine to obtain final concentrate with grades ranging from 64% to 65% and weak-magnetic tailings with grades ranging from 5% to 8%. The iron content dissociation degree in the process is defined to 80%, and weak-magnetic throughput in subsequent selection operation is decreased by 30%, so that magnet strengthening and concentration operation before magnet strengthening are omitted; the final concentrate grade is improved by 1.5%.
Description
Technical field
The present invention relates to reclaim hematite reverse flotation mine tailing technical field, particularly a kind of bloodstone mine tailing difference ore grinding, centrifugal recovery process.
Background technology
Adopting at present the iron mineral running off in the bloodstone mine tailing that selects factory to produce of " stage grinding, coarse and fine separation; weight-magnetic-floating combined process flow " is mainly russet iron and Armco magnetic iron, the recovery of bloodstone mine tailing is generally adopted at present: the mixed magnetic essence that the bloodstone mine tailing of take adopts weak magnetic, high-intensity magnetic separation to obtain is rough concentrate, after being regrinded, mixed magnetic essence uses again weak magnetic, strong magnetic, reverse floatation process is selected
Chinese patent 201010533402.X discloses a kind of " method of iron ore concentrate in recovery stage ore grinding, coarse and fine separation, weight-magnetic-floating flow process mine tailing ", the method adopts two sections of spiral chutes, permanent magnetism to scan, spiral shell essence, the smart rough concentrate that is mixed into of permanent magnetism, after rough concentrate ore grinding, use weak magnetic, strong magnetic, reverse floatation process is selected again.It is of high grade that above two flow processs are compared the latter's rough concentrate, and ore grinding amount is few, has some superiority, but the rough concentrate of the two all mixes after ore grinding again through weak magnetic, strong magnetic, and reverse floatation process is selected.The main deficiency that the technique of this rough concentrate mixing ore grinding exists is: the first, and grindability and the degree of dissociation under identical grinding particle size of spiral shell essence and permanent magnetism essence are all variant, and ore grinding specific aim is poor; The second, before the excessive large and strong magnetic of strong magnetic flux, need to concentrate.
Summary of the invention
The object of the invention is to provide a kind of technique that reclaims iron ore concentrate from bloodstone mine tailing, by bloodstone mine tailing respectively ore grinding, sort respectively, make ore grinding more targeted, final concentrate grade improves 1.5 percentage points.
The object of the invention is to realize by following technical proposals:
A kind of bloodstone mine tailing of the present invention is ore grinding, centrifugal recovery process respectively, it is characterized in that:
1) the bloodstone mine tailing that is 10%～15% by grade feeds roughly selects spiral chute, acquisition is roughly selected spiral chute concentrate and is roughly selected spiral chute mine tailing, it is roughly selected spiral chute concentrate and feeds selected spiral chute, obtaining respectively grade is more than 40% selected spiral chute concentrate, selected spiral chute chats and selected spiral chute mine tailing, its selected spiral chute chats self-loopa, roughly select spiral chute mine tailing and selected spiral chute mine tailing and merge and feed permanent magnetic motor and scan, permanent magnetism concentrate and the permanent magnetism mine tailing of grade below 10% that to obtain grade be 23～28%;
2) adopt respectively the closed circuit grinding system of cyclone and grinding machine composition to carry out ore grinding in selected spiral chute concentrate and permanent magnetism concentrate, to reach iron mineral degree of dissociation 80%;
Being about to granularity is 55～60%, grade is that 23～28% permanent magnetism concentrate feeds cyclone II and carries out classification, granularity after classification is that the sand setting of 51%～56% cyclone II feeds ball mill II, the granularity of its ball mill II is that 70%～75% ore discharge returns to cyclone II to ore deposit, the overflow of cyclone II is as permanent magnetism concentrate ore milling product, and its granularity is 96%～98%-200 order;
By granularity, be 55%～60%, grade is that more than 40% selected spiral chute concentrate feeds cyclone I and carries out classification, the sand setting of the cyclone I that after classification, granularity is 48%～52% feeds ball mill I, the granularity of its ball mill I is returned to cyclone I to ore deposit at 67%～72% ore discharge, the overflow of cyclone I is as selected spiral chute concentrate ore milling product, and its granularity is 92～93%-200 order;
3) by granularity, be that a little less than 96%～98%-200 object permanent magnetism concentrate ore milling product feeds, magnetic machine sorts, obtain more than 45% inferior fine magnetite concentrate of grade and the weakly magnetic tailings of grade 5～8%,
4) by 92%～93%-200 order selected spiral chute concentrate ore milling product and grade, more than 45% inferior fine magnetite concentrate adopts two sections of centrifuges to carry out selected after merging, the concentrate of one section of centrifuge feeds two sections of centrifuges, the concentrate of two sections of centrifuges is that grade is 64～65% final concentrate, the mine tailing of two sections of centrifuges turns back to one section of centrifuge, and permanent magnetism mine tailing below 10% of the weakly magnetic tailings that grade is 5～8%, grade and the mine tailing of one section of centrifuge are abandoned as true tailings.
The invention has the beneficial effects as follows:
The present invention adopt " two sections of spiral chute-permanent magnetism are scanned; weak magnetic-spiral shell fine grinding ore deposit, permanent magnetism fine grinding ore deposit; centrifuge sorting process " to selected spiral chute concentrate and permanent magnetism essence respectively ore grinding, sort respectively, ore grinding is more targeted, this technique is mixed ore grinding by weak magnetic, strong magnetic with existing spiral shell essence and permanent magnetism essence, centrifuge technique sorts to be compared when iron mineral degree of dissociation is 80%, and the front concentrated operation of strong magnetic and strong magnetic has been saved in the excessive minimizing 30% of weak magnetic flux of follow-up sorting operation; Final concentrate grade improves 1.5 percentage points.
Accompanying drawing explanation
Fig. 1 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 1, a kind of bloodstone mine tailing of the present invention is ore grinding, centrifugal recovery process respectively, it is characterized in that:
1) the bloodstone mine tailing that is 10%～15% by grade feeds roughly selects spiral chute, acquisition is roughly selected spiral chute concentrate and is roughly selected spiral chute mine tailing, it is roughly selected spiral chute concentrate and feeds selected spiral chute, obtaining respectively grade is more than 40% selected spiral chute concentrate, selected spiral chute chats and selected spiral chute mine tailing, its selected spiral chute chats self-loopa, roughly select spiral chute mine tailing and selected spiral chute mine tailing and merge and feed permanent magnetic motor and scan, permanent magnetism concentrate and the permanent magnetism mine tailing of grade below 10% that to obtain grade be 23～28%;
2) adopt respectively the closed circuit grinding system of cyclone and grinding machine composition to carry out ore grinding in selected spiral chute concentrate and permanent magnetism concentrate, to reach iron mineral degree of dissociation 80%;
Being about to granularity is 55～60%, grade is that 23～28% permanent magnetism concentrate feeds cyclone II and carries out classification, granularity after classification is that the sand setting of 51%～56% cyclone II feeds ball mill II, the granularity of its ball mill II is that 70%～75% ore discharge returns to cyclone II to ore deposit, the overflow of cyclone II is as permanent magnetism concentrate ore milling product, and its granularity is 96～98%-200 order;
By granularity, be 55%～60%, grade is that more than 40% selected spiral chute concentrate feeds cyclone I and carries out classification, the sand setting of the cyclone I that after classification, granularity is 48%～52% feeds ball mill I, the granularity of its ball mill II is returned to cyclone I to ore deposit at 67%～72% ore discharge, the overflow of cyclone I is as selected spiral chute concentrate ore milling product, and its granularity is 92～93%-200 order;
3) by granularity, be that a little less than 96%～98%-200 object permanent magnetism concentrate ore milling product feeds, magnetic machine sorts, obtain more than 45% inferior fine magnetite concentrate of grade and the weakly magnetic tailings of grade 5～8%,
4) by 92%～93%-200 order selected spiral chute concentrate ore milling product and grade, more than 45% inferior fine magnetite concentrate adopts two sections of centrifuges to carry out selected after merging, the concentrate of one section of centrifuge feeds two sections of centrifuges, the concentrate of two sections of centrifuges is that grade is 64～65% final concentrate, the mine tailing of two sections of centrifuges turns back to one section of centrifuge, and permanent magnetism mine tailing below 10% of the weakly magnetic tailings that grade is 5～8%, grade and the mine tailing of one section of centrifuge are abandoned as true tailings.
Also can be by grade more than 45% inferior fine magnetite concentrate and regrind after the selected spiral chute concentrate of 92%～93%-200 order ore milling product adopt a thick essence three to sweep reverse flotation work after merging to sort, can obtain equally grade is more than 65% final concentrate.
Claims (1)
1. bloodstone mine tailing is distinguished ore grinding, a centrifugal recovery process, it is characterized in that:
1) the bloodstone mine tailing that is 10%～15% by grade feeds roughly selects spiral chute, acquisition is roughly selected spiral chute concentrate and is roughly selected spiral chute mine tailing, it is roughly selected spiral chute concentrate and feeds selected spiral chute, obtaining respectively grade is more than 35% selected spiral chute concentrate, selected spiral chute chats and selected spiral chute mine tailing, its selected spiral chute chats self-loopa, roughly select spiral chute mine tailing and selected spiral chute mine tailing and merge and feed permanent magnetic motor and scan, permanent magnetism concentrate and the permanent magnetism mine tailing of grade below 10% that to obtain grade be 23～28%;
2) adopt respectively the closed circuit grinding system of cyclone and grinding machine composition to carry out ore grinding in selected spiral chute concentrate and permanent magnetism concentrate, to reach iron mineral degree of dissociation 80%;
Being about to granularity is 55～60%, grade is that 23～28% permanent magnetism concentrate feeds cyclone II and carries out classification, granularity after classification is that the sand setting of 51%～56% cyclone II feeds ball mill II, the granularity of its ball mill II is that 70%～75% ore discharge returns to cyclone II to ore deposit, the overflow of cyclone II is as permanent magnetism concentrate ore milling product, and its granularity is 96～98%-200 order;
By granularity, be 55%～60%, grade is that more than 40% selected spiral chute concentrate feeds cyclone I and carries out classification, the sand setting of the cyclone I that after classification, granularity is 48%～52% feeds ball mill I, the granularity of its ball mill II is returned to cyclone I to ore deposit at 67%～72% ore discharge, the overflow of cyclone I is as selected spiral chute concentrate ore milling product, and its granularity is 92～93%-200 order;
3) by granularity, be that a little less than 96%～98%-200 object permanent magnetism concentrate ore milling product feeds, magnetic machine sorts, obtain more than 45% inferior fine magnetite concentrate of grade and the weakly magnetic tailings of grade 5～8%,
4) by 92%～93%-200 order selected spiral chute concentrate ore milling product and grade, more than 45% inferior fine magnetite concentrate adopts two sections of centrifuges to carry out selected after merging, the concentrate of one section of centrifuge feeds two sections of centrifuges, the concentrate of two sections of centrifuges is that grade is 64～65% final concentrate, the mine tailing of two sections of centrifuges turns back to one section of centrifuge, and permanent magnetism mine tailing below 10% of the weakly magnetic tailings that grade is 5～8%, grade and the mine tailing of one section of centrifuge are abandoned as true tailings.
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| CN201410359179.XA CN104148165A (en) | 2014-07-28 | 2014-07-28 | Process for separate grinding and centrifugal recycling of hematite tailings |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107597411A (en) * | 2017-09-06 | 2018-01-19 | 中钢集团马鞍山矿山研究院有限公司 | A kind of beneficiation method for improving high-sulfur mixed magnetite and hematite stone sorting index |
| 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 |
| CN108580028A (en) * | 2018-08-01 | 2018-09-28 | 中冶北方（大连）工程技术有限公司 | A kind of red magnetic mixing iron ore chats ore-dressing technique |
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| CN107597411A (en) * | 2017-09-06 | 2018-01-19 | 中钢集团马鞍山矿山研究院有限公司 | A kind of beneficiation method for improving high-sulfur mixed magnetite and hematite stone sorting index |
| CN107597411B (en) * | 2017-09-06 | 2019-10-25 | 中钢集团马鞍山矿山研究院有限公司 | A kind of raising high-sulfur magnetic-red compound iron ore sorting index beneficiation method |
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| CN108580028A (en) * | 2018-08-01 | 2018-09-28 | 中冶北方（大连）工程技术有限公司 | A kind of red magnetic mixing iron ore chats ore-dressing technique |
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Address after: 114001 Anshan District, Liaoning, No. 219 Road, No. 39, Tiedong Applicant after: Anshan Iron and Steel Group Mining Co., Ltd. Address before: 114001 Anshan District, Liaoning, No. 219 Road, No. 39, Tiedong Applicant before: Anshan Iron & Steel Group Mining Co., Ltd. |
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Application publication date: 20141119 |