CN105233975A - Tailing treatment process in poor magnetic iron ore beneficiation process - Google Patents
Tailing treatment process in poor magnetic iron ore beneficiation process Download PDFInfo
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- CN105233975A CN105233975A CN201510742522.3A CN201510742522A CN105233975A CN 105233975 A CN105233975 A CN 105233975A CN 201510742522 A CN201510742522 A CN 201510742522A CN 105233975 A CN105233975 A CN 105233975A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B9/00—General arrangement of separating plant, e.g. flow sheets
- B03B9/06—General arrangement of separating plant, e.g. flow sheets specially adapted for refuse
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/52—Mechanical processing of waste for the recovery of materials, e.g. crushing, shredding, separation or disassembly
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Abstract
The invention relates to a tailing treatment process in a poor magnetic iron ore beneficiation process. The tailing treatment process comprises the following steps: a poor magnetic iron ore is fed in a high-pressure grinding roller and a screening machine for a closed-circuit grinding operation; a screened product of the screening machine is fed to a roughing magnetic separator; and a concentrate thereof is fed to a subsequent operation. The tailing treatment process is characterized by further comprising the following steps: a tailing of the roughing magnetic separator is fed to a concentration cyclone; a underflow product of the concentration cyclone is fed to a tailing dehydration sieve; an overflow product of the concentration cyclone, a screened product of the dehydration sieve and a tailing in a subsequent separation operation are all fed to a tailing concentrator for a concentration operation; a underflow product of the tailing concentrator is fed to a tailing press filter for filtration; and an unscreened product of the dehydration sieve and a filter cake of the tailing press filter are fed to a tailing dry discharge belt conveyer for conveying to a tailing storage yard or a tailing pond for storage. The tailing treatment process has the following advantages: the dry discharge treatment is performed for a thick-particle tailing in nearly one half of the separation process, and the rest tailing is concentrated and filtered to realize the tailing dry discharge, so that the tailing treatment process in the poor magnetic iron ore beneficiation process is comprehensively optimized.
Description
Technical field
The invention belongs to iron ore beneficiation technical field, particularly a kind of chromium depleted zone stone ore dressing process tailing treatment technology
.
Background technology
Current most domestic Mine Tailings adopts the mode of Hydraulic transportation to deliver to Tailings Dam and stores in a conventional manner, not only serious destruction is caused to environment, add potential safety hazard, and a large amount of land occupation, increase the operation cost of habilitation and Tailings Dam, become the key issue of restriction Mine Sustainable Development., because discharge capacity causes greatly Tailings Dam shortening in service life, but also there is the danger of dam break in the particularly discharge of iron ore mine mine tailing.In the face of many drawbacks of tailings discharging, the high concentration of mine tailing is stored up and is constantly developed as a kind of new tailings glass technology in recent years, achieve the object of water saving, decrease the threat to dam body and environment airborne dust, avoid the pollution to Soil Surrounding and groundwater resources, add reservoir area service life, solve a production difficult problem for dry area in north china serious water shortage.
The high concentration mode of storing up of mine tailing mainly contains the modes such as highly enriched conveying, lotion discharge and tailing dry row.
1, the technology that mine tailing Rich thickness transportation mainly adopts carries out High efficient Revamp to original concentrator, or adopt Hhigh-efficient thickener to make thickener underflow concentration reach more than 45%, then Tailings Dam is transported to, this mode is only the reduction of the loss of water, saved operating cost, but the problems referred to above fundamentally do not solve.
Although 2, lotion discharge can solve water conservancy use and environmental issue, but require stricter to mine tailing granularmetric composition, the content being wherein less than 20 microns must reach more than 15%, this rank can the seepage flow of anti-sealing, therefore not all mine tailing is all applicable, and particularly iron tailings is applied also fewer at present at present.Except formation lotion has strict demand to granularity, the equipment piston pump of conveying lotion is also relatively stricter to mine tailing granularity requirements, and general the largest particles does not allow more than 0.3mm, limits the popularization of lotion discharge for above-mentioned reasons.
3, tailing dry row is by mine tailing by after concentrated, dewatering and filtering, a kind of method can directly transported under moisture is less than 15% condition.This method not only solves the problems referred to above, does not also need to build Tailings Dam.Current tailing dry-type emission technology mainly contains " concentrator+cyclone+filter ", " concentrator+filter " and " cyclone+concentrator+dewatering screen " three kinds, the major defect existed is: because these three kinds of techniques are relatively independent, what process is whole process mine tailing or wholegrain level mine tailing, for large-scale Mineral Processing Enterprises, need supporting concentrating, dehydration and filter plant facility scale large, investment and follow-up operation cost are increased considerably, therefore current domestic and international large-scale Mineral Processing Enterprises adopts the also fewer of this technique, general is all that the medium and small Mineral Processing Enterprises of tailings glass amount less than 150 tons/hour have employed this technique.
Current chromium depleted zone stone ore dressing process tailing treatment technology process is generally: 1, will be improved the grade of milling ore after chromium depleted zone ore reduction to suitable granularity by dry-type magnetic extractor, the qualified coarse fraction mine tailing that dry-type magnetic extractor is dished out directly is transported as barren rock or proceeds processing and utilization, after the concentrate product of dry-type magnetic extractor continues through closed circuit crushing and screening, underproof product returns disintegrating machine, the product that granularity is qualified feeds subsequent job, and granularity General Requirements is below 12mm.The operations such as subsequent job mainly comprises ore grinding, sorts, concentrated and filtration.Grinding operation in subsequent job is generally two sections or three sections, generally all adopts ball mill; Sorting operation in subsequent job is generally five to eight sections and sorts, and generally all adopts the magnetic plant such as magnetic separator, magnetic dewater cone; Concentrator in subsequent job generally all adopts common concentrator or Hhigh-efficient thickener; Filter plant in subsequent job is generally the equipment such as vacuum filter or filter press; 2, meet the concentrate product of the dry-type magnetic extractor of subsequent job granularity requirements, after above-mentioned subsequent job, concentrate grade improves further, and final production goes out qualified iron ore concentrate; The mine tailing that above-mentioned subsequent job produces mainly comes from each section of sorting operation, i.e. the sorting equipment such as magnetic separator and magnetic dewater cone, and its mine tailing generally flows automatically and enters mine tailing concentrator, stores after concentrated with transport pump to Tailings Dam.Or first after Tailing thickening machine is concentrated, the underflow of mine tailing concentrator feeds filter, is reduced to by moisture after below 15%, carries out tailing dry row by belt conveyer.The major defect that current this chromium depleted zone ore dressing process tailing treatment technology exists is: if 1 by mine tailing after concentrated, directly store to Tailings Dam with transport pump, not only easily harmful effect is caused to environment, too increase potential safety hazard, and a large amount of land occupation, add the operation cost of habilitation and Tailings Dam; If 2 first mine tailing is first concentrated by concentrator after, carry out tailing filtration again, dry row is carried out finally by belt conveyer, although solve the problems referred to above, but because follow-up sorting operation mine tailing productive rate generally all exceedes more than 60% of total throughput, need mine tailing amount that is concentrated and that filter huge, certainly will cause the investment of Tailing thickening and filtration system and operating cost too high, therefore large-scale and super-huge iron ore beneficiation enterprise seldom has employing so far at present.
Summary of the invention
The object of the invention is the above-mentioned defect particularly existed at present in magnetite separation process iron tailings treatment process to overcome iron ore dressing process, for big-and-middle-sized magnetite separation enterprise production process provides the chromium depleted zone stone ore dressing process tailing treatment technology of a kind of economy, efficient and environmental protection, while raising tailings glass efficiency, improve tailing treatment technology, reduce tailings glass operation cost.
The object of the invention is to be realized by following technical proposals:
A kind of chromium depleted zone stone ore dressing process tailing treatment technology of the present invention, comprise that granularity after thick, middle fragmentation is less than 50mm, the chromium depleted zone stone of grade less than 35% feeds high-pressure roller mill and after screening machine closed circuit grinding operation process, granularity is less than the undersize that 3mm accounts for more than 90% and feeds magnetic rougher, the concentrate of magnetic rougher feeds ore grinding, magnetic separation, concentrates and filters the subsequent job formed, and characterized by further comprising the following step:
The mine tailing of magnetic rougher feeds concentrate cyclone and carries out concentrated operation, concentrate cyclone concentrate rear concentration reach more than 55% underflow product gravity flow feed tailings dewatering sieve carry out dewatering operation, the oversize of dewatering screen transports tailings stack or Tailings Dam storage to through tailing dry row belt conveyer, the overflow product of concentrate cyclone, the mine tailing of undersize and follow-up sorting operation that moisture content is less than the dewatering screen of 15% feeds Tailing thickening machine in the lump and carries out concentrated operation, the overflow of Tailing thickening machine is as production cycle water, the underflow product that Tailing thickening machine concentration is greater than 65% feeds refuse filter press and filters, the filtrate of filter press, return product returns Tailing thickening machine, the refuse filter press filter cake that moisture content is less than 12% feeds tailing dry row belt conveyer equally and transports tailings stack or Tailings Dam storage to.
Advantage of the present invention is:
For chromium depleted zone ore dressing process thick magnetic concentration working mine tailing coarse size, feature that mine tailing productive rate is high, the preferential row of doing that carried out by the coarse fraction mine tailing of near for the process that sorts half processes, all the other mine tailings realize tailing dry row together with concentrating after press filtration, optimize chromium depleted zone ore dressing process tailing treatment technology comprehensively, this technique significantly reduces the treating capacity of Tailing thickening machine and follow-up tailings glass equipment, decrease investment and the floor space of tailings glass installations and facilities, improve tailing treatment technology, reduce tailings glass operation cost, realize energy saving standard doulbe-sides' victory.
Accompanying drawing explanation
Fig. 1 is process chart of the present invention.
Detailed description of the invention
The specific embodiment of the present invention is further illustrated below in conjunction with accompanying drawing.
As shown in Figure 1, a kind of chromium depleted zone stone ore dressing process tailing treatment technology of the present invention, comprise that granularity after thick, middle fragmentation is less than 50mm, the chromium depleted zone stone of grade less than 35% feeds high-pressure roller mill and after screening machine closed circuit grinding operation process, granularity is less than the undersize that 3mm accounts for more than 90% and feeds magnetic rougher, the concentrate of magnetic rougher feeds ore grinding, magnetic separation, concentrates and filters the subsequent job formed, and characterized by further comprising the following step:
The mine tailing of magnetic rougher feeds concentrate cyclone and carries out concentrated operation, concentrate cyclone concentrate rear concentration reach more than 55% underflow product gravity flow feed tailings dewatering sieve carry out dewatering operation; The screen size of described tailings dewatering sieve is 0.5 ~ 1.5mm, the oversize of dewatering screen transports tailings stack or Tailings Dam storage to through tailing dry row belt conveyer, and the mine tailing of undersize and follow-up sorting operation that the overflow product of concentrate cyclone, moisture content are less than the dewatering screen of 15% feeds Tailing thickening machine in the lump and carries out concentrated operation.Tailing thickening machine of the present invention adopts efficient deep wimble thickener, the overflow of Tailing thickening machine is as production cycle water, the underflow product that Tailing thickening machine concentration is greater than 65% feeds refuse filter press and filters, the filtrate of filter press, return product return Tailing thickening machine, and the refuse filter press filter cake that moisture content is less than 12% feeds tailing dry row belt conveyer equally and transports tailings stack or Tailings Dam storage to.
The present invention is in conjunction with the feature of chromium depleted zone stone, the preferential row of doing that carried out by the coarse fraction mine tailing of near for the process that sorts half processes, all the other mine tailings realize tailing dry row together with concentrating after press filtration, optimize chromium depleted zone ore dressing process tailing treatment technology comprehensively, be particularly suitable for the large-scale of disposal ability more than 5,000,000 tons super-huge chromium depleted zone mineral processing production enterprise is newly-built or transformation adopt.Both can reduce floor space, reduce investment outlay, and not need again to build Tailings Dam separately, can cut operating costs further, solve the difficult problem such as Safety of Tailings Dam and ring protection that current most of Mineral Processing Enterprises faces.
Claims (3)
1. a chromium depleted zone stone ore dressing process tailing treatment technology, comprise that granularity after thick, middle fragmentation is less than 50mm, the chromium depleted zone stone of grade less than 35% feeds high-pressure roller mill and after screening machine closed circuit grinding operation process, granularity is less than the undersize that 3mm accounts for more than 90% and feeds magnetic rougher, the concentrate of magnetic rougher feeds ore grinding, magnetic separation, concentrates and filters the follow-up sorting operation formed, and characterized by further comprising the following step:
The mine tailing of magnetic rougher feeds concentrate cyclone and carries out concentrated operation, concentrate cyclone concentrate rear concentration reach more than 55% underflow product gravity flow feed tailings dewatering sieve carry out dewatering operation, the oversize of dewatering screen transports tailings stack or Tailings Dam storage to through tailing dry row belt conveyer, the overflow product of concentrate cyclone, the mine tailing of undersize and follow-up sorting operation that moisture content is less than the dewatering screen of 15% feeds Tailing thickening machine in the lump and carries out concentrated operation, the overflow of Tailing thickening machine is as production cycle water, the underflow product that Tailing thickening machine concentration is greater than 65% feeds refuse filter press and filters, the filtrate of filter press, return product returns Tailing thickening machine, the refuse filter press filter cake that moisture content is less than 12% feeds tailing dry row belt conveyer equally and transports tailings stack or Tailings Dam storage to.
2. chromium depleted zone stone ore dressing process tailing treatment technology according to claim 1, is characterized in that the screen size of described tailings dewatering sieve is 0.5 ~ 1.5mm.
3. chromium depleted zone stone ore dressing process tailing treatment technology according to claim 1, is characterized in that described Tailing thickening machine adopts efficient deep wimble thickener.
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| CN201510742522.3A CN105233975A (en) | 2015-11-05 | 2015-11-05 | Tailing treatment process in poor magnetic iron ore beneficiation process |
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| CN201510742522.3A CN105233975A (en) | 2015-11-05 | 2015-11-05 | Tailing treatment process in poor magnetic iron ore beneficiation process |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106311438A (en) * | 2016-08-19 | 2017-01-11 | 鞍钢集团矿业有限公司 | Low-grade Anshan magnetite beneficiation process |
| CN107188388A (en) * | 2017-07-11 | 2017-09-22 | 烟台禹顺环保科技有限公司 | A kind of dry-discharge system for tailings and method |
| CN107477366A (en) * | 2017-07-17 | 2017-12-15 | 首钢集团有限公司 | A kind of feed system and process |
| CN111035991A (en) * | 2019-12-10 | 2020-04-21 | 山东省冶金设计院股份有限公司 | Dry-discharging and dewatering system and process for iron tailings |
| CN111068402A (en) * | 2019-12-20 | 2020-04-28 | 仇爽 | Movable sand washing system |
| CN111097594A (en) * | 2019-12-20 | 2020-05-05 | 仇爽 | Movable ore dressing and tailing processing system |
| CN111097205A (en) * | 2019-12-20 | 2020-05-05 | 仇爽 | Movable system sand system |
| CN111749701A (en) * | 2020-05-19 | 2020-10-09 | 大连船舶重工集团有限公司 | Large-scale offshore mining, selecting and storing integrated engineering ship |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106311438A (en) * | 2016-08-19 | 2017-01-11 | 鞍钢集团矿业有限公司 | Low-grade Anshan magnetite beneficiation process |
| CN107188388A (en) * | 2017-07-11 | 2017-09-22 | 烟台禹顺环保科技有限公司 | A kind of dry-discharge system for tailings and method |
| CN107477366A (en) * | 2017-07-17 | 2017-12-15 | 首钢集团有限公司 | A kind of feed system and process |
| CN111035991A (en) * | 2019-12-10 | 2020-04-21 | 山东省冶金设计院股份有限公司 | Dry-discharging and dewatering system and process for iron tailings |
| CN111068402A (en) * | 2019-12-20 | 2020-04-28 | 仇爽 | Movable sand washing system |
| CN111097594A (en) * | 2019-12-20 | 2020-05-05 | 仇爽 | Movable ore dressing and tailing processing system |
| CN111097205A (en) * | 2019-12-20 | 2020-05-05 | 仇爽 | Movable system sand system |
| CN111749701A (en) * | 2020-05-19 | 2020-10-09 | 大连船舶重工集团有限公司 | Large-scale offshore mining, selecting and storing integrated engineering ship |
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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: Angang Group Mine Company |
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