CN109201277A - Technique is selected in a kind of Anshan type lean octahedral iron ore mine tailing high efficiente callback again - Google Patents
Technique is selected in a kind of Anshan type lean octahedral iron ore mine tailing high efficiente callback again Download PDFInfo
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- CN109201277A CN109201277A CN201811098588.3A CN201811098588A CN109201277A CN 109201277 A CN109201277 A CN 109201277A CN 201811098588 A CN201811098588 A CN 201811098588A CN 109201277 A CN109201277 A CN 109201277A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C21/00—Disintegrating plant with or without drying of the material
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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
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C1/00—Magnetic separation
Abstract
The present invention relates to a kind of Anshan type lean octahedral iron ore mine tailing high efficiente callbacks to select technique again, it include: that the Anshan type lean octahedral iron ore magnetic tailing that full Iron grade is 7~13% is fed tailing high efficiente callback to select technique again, it is characterised in that: the technique is successively made of following operations: a stages of magnetic separation grinding-classification operation, two stages of magnetic separation grinding-classification operations and final magnetic concentration working；The two stages of magnetic separation grinding-classification operations handle scalping overflow, and the final magnetic concentration working handles secondary grading overflow.This technique obtains the final concentrate of 64% or more Iron grade, true tailings magnetism iron content < 0.8%；The invention has the advantages that 1, using long cartridge type grinding machine and vertical stirring mill, improve fine grinding efficiency；And it is all made of grind grading, tail is thrown in advance, improves grind grading efficiency；2, it using magnetic field magnetic separator in adverse current type and elutriation magnetic separator, reduces Armco magnetic iron and is lost, guarantee final concentrate grade.
Description
Technical field
The invention belongs to technical field of beneficiation, and in particular to a kind of Anshan type using advanced practical mill ore magnetic selection equipment is poor
Technique is selected in magnetic iron ore tailing high efficiente callback again.
Background technique
The mineral processing circuit of Anshan type lean octahedral iron ore mostly uses greatly the single magnetic separation-Fine screening-regrinding technology of stage grinding-.By
It is thin in Anshan type lean octahedral iron ore stone grain size number, degree of dissociation of mineral monomer is relatively low, sort during generate the big portion of magnetic tailing
Divide and exist in the form of the intergrowth and sludge of iron mineral and gangue mineral, exists on a small quantity with -10 microns of monomer mineral.To Anshan type
The mineral processes of chromium depleted zone magnetic tailing research shows that: the iron mineral composition of magnetic tailing is general are as follows: magnetic iron ore, silicic acid
Iron, ferric carbonate, half martite of illusion and hematite-limonite, wherein can be false with the magnetic iron ore and illusion half that magnetic selection method recycles
Account for 5~12% and 1~6% respectively as bloodstone, remaining is more difficult recycling and unrenewable iron mineral.
Anshan type lean octahedral iron ore magnetic tailing recovery system mostly uses naked magnetic disc type recycling machine or low-intensity (magnetic) separator at present,
Recycling is carried out to the magnetic mineral in tailing, the rough concentrate of recycling carries out ore grinding again and sorts processing.There are the problem of: first is that
Naked magnetic disc type recycling machine or low-intensity (magnetic) separator magnetic field strength and magnetic field gradient are generally lower, and field strength is mostly in 200mT hereinafter, most
Magnetic iron content is only capable of guaranteeing still have the loss of part magnetic mineral 1% or so in the tailing dished out eventually；Second is that due to recycling
Rough concentrate be largely difficult mill and difficult choosing intergrowth, after subsequent conventional ore grinding, sorting processing, essence that final production goes out
Mineral products Iron grade and the rate of recovery are lower, sort inefficient；Third is that if individually being improved back using the method for improving magnetic field force
It produces effects fruit, but since magnetic field force is excessive, the weak magnetic minerals such as part ferric carbonate, bloodstone are recovered into rough concentrate, subsequent
Ore grinding, sorting operation processing difficulty are big, need using techniques such as roasting-ore grinding-magnetic separation, and production cost is excessively high, uneconomical, and
The problems such as there are safety and environmental protection.
Chinese patent 200710011604.6 discloses " novel process for recycling Anshan type lean octahedral iron ore mine tailing ", and feature exists
In: using magnetic-it is de--magnetic-is de--five stages of magnetic separation of magnetic, dusting cover self-loopa single magnetic separation process recycle tailing, the tail from magneticore-dressing plant
Mine is after the recycling of naked magnetic disc type recycling machine, dish out part fine tailings other by one section of dehydration flowing current separation, is dehydrated slot concentrate through being dehydrated
Enter ball mill ore grinding after magnetic separator concentrating, ball mill ore discharging enters two sections of dehydration slots, and two sections of dehydration slot concentrate feed weak magnetic magnetic
Machine is selected, weak magnetic magnetic separator concentrate feeds dusting cover, and dusting cover oversize is dehydrated magnetic separator as middling recurrence, and screenings is final essence
Mine, one section of dehydration slot tailing, dehydration magnetic separator tailings, two sections of dehydration slot tailings and weak magnetic magnetic separator tailings, which merge, becomes final tail
Mine.The technique although can by compared with short processes process recovery section Anshan type lean octahedral iron ore mine tailing, but still exist it is obvious not
Foot: it first is that naked magnetic disc type recycling machine single machine sorts low efficiency, takes up a large area, is affected, is needed to configure more by the variation of mine amount
Platform can be only achieved recovering effect, and the tail that this recyclable device field strength is generally dished out after 150-200mT or so, recycling at present
Magnetic iron content is generally 1% or so in mine, however it remains a small amount of metal loss；Second is that the technique is using common magnetic separator and takes off
Sink sorts low efficiency；Third is that since Anshan type lean octahedral iron ore mine tailing mainly exists in the form of lean intergrowth, iron mineral monomer solution
Generally it is lower than 50% from degree, ore milling product granularity, which needs to reach 95%-0.045mm, even more carefully just can guarantee iron mineral monomer dissociation
Degree reaches 80% or more, and then produces commodity concentrate.And the technique only leans on the combination of common overflow type grinding machine and dusting cover, is difficult
Reach the ore milling product granularity of requirement, final concentrate grade is relatively low, can not become a kind of independent product sale, can only return to mainstream
Journey reprocessing, has some impact on main flow production target again.
Chinese patent 201010187615.1 discloses " Novel recovering process of Anshan-type iron tailings ", it is characterised in that: selects factory
Rough concentrate is obtained after the recovered machine recycling of tailing, rough concentrate enters vibration after magnetic force dehydration slot is concentrated and improves concentrate grade
Dusting cover, oversize remittance true tailings sieve lower concentrate and enter magnetic separator choosing deeply, and magnetic separator concentrate feeds and obtains after centrifuge sorts
To final concentrate.Recycling machine tailing, dehydration slot tailing, magnetic separator tailings, centrifuge tailing and dusting cover oversize are merged into finally
Tailing, the technological advantage are that process is simple, do not have grinding operation, can recycle iron mineral on a small quantity.But defect is also obvious: first is that
Due to the objective reality that Anshan type iron mine stone degree of dissociation of mineral monomer is relatively low, in ore-dressing technique tailing most of iron mineral be with
The intergrowth form of iron mineral and gangue mineral exists, and the process flow is without grinding operation and directly using oversize as most
Finality mine is abandoned, and is equivalent to most of magnetic mineral that recycling machine has been chosen and is abandoned again；Second is that centrifuge conduct
Final cleaning equipment, tailing do not scan equipment and check on, and microfine monomer iron mineral is necessarily caused to be lost.
Chinese patent CN201310326795.0 discloses " technique of iron ore concentrate is sorted in chromium depleted zone tailing ", feature
It is to include the following steps: the chromium depleted zone tailing for being 8~11% by grade, grade is 16~20% after the recycling of disk recycling machine
Rough concentrate, feed one section of pre-selection magnetic separator and sort, pre-selection magnetic separator concentrate feed scalping, the overflow of scalping is fed
Two stages of magnetic separation, the underflow of scalping feed one section of closed circuit grinding of ball milling formation, two stages of magnetic separation concentrate are fed two sections
After tower mill carries out ore grinding, granularity reaches -325 or -500 mesh contents 90%, then feeds three stage magnetic separators, four stage magnetic separators and five sections
Magnetic separator is sorted, and is obtained final concentrate of the grade 64.98%~67.21%%, is preselected magnetic separator tailings, two sections of magnetic tails
Mine, three sections of magnetic tail mines, four sections of magnetic tail mines and five sections of magnetic tail mines are combined into true tailings.The characteristics of technique is by increasing grinding section
It counts and sorts number of segment to improve concentrate grade, as long as guaranteeing ore milling product granularity, concentrate grade can generally guarantee.But from tailing
Comprehensively consider in terms of resource recycling efficiency, which still has deficiency: first is that the technique still uses disk recycling machine
The chromium depleted zone tailing that grade is 8~11% is handled, since disk recycling machine magnetic field strength and magnetic field gradient are relatively low, magnetic field force is not
Foot, Armco magnetic iron recovery efficiency are lower；Second is that the technique is not introduced into sorting operation after primary grinding operation, cause
The part gangue and lean intergrowth of dissociation are introduced into grind grading circulation, reduce a grind grading efficiency；Second is that the technique
Two sections of tower mill operations use open-circuit grinding, and ore milling product granularity greatly, is easy to produce when treating capacity is few with mine amount variation fluctuating range
Life is overground, causes 10 micron level contents in ore milling product to sharply increase, causes subsequent sorting operation metal loss serious.Processing
Ore milling product granularity not can guarantee again when measuring big, and final concentrate grade is necessarily caused to fluctuate；Third is that the technique does not fully consider
The most iron that can be recycled in chromium depleted zone tailing are Armco magnetic irons, to disc type recycling machine, each stage magnetic separator magnetic field in technique
The key equipments parameter such as intensity is not distinctly claimed, and Armco magnetic iron recovering effect is unable to fully guarantee.
Summary of the invention
The purpose of the present invention is provide a kind of Anshan type lean octahedral iron ore tail by using advanced practical mill ore magnetic selection equipment
Technique is selected in mine high efficiente callback again.
The present invention is implemented as follows:
A kind of Anshan type lean octahedral iron ore mine tailing high efficiente callback of the invention selects technique again, comprising: by full Iron grade is 7~13%
Anshan type lean octahedral iron ore magnetic tailing feeds tailing high efficiente callback and selects technique again, it is characterised in that: the technique is successively by following works
Industry composition: a stages of magnetic separation grinding-classification operation, two stages of magnetic separation grinding-classification operations and final magnetic concentration working；One stages of magnetic separation
Grinding-classification operation handles the Anshan type lean octahedral iron ore magnetic tailing that full Iron grade is 7~13%, the two stages of magnetic separation ore grindings point
Grade operation handles scalping overflow, and the final magnetic concentration working handles secondary grading overflow.
The one stages of magnetic separation grinding-classification operation is made of a stage magnetic separator, a cyclone and a grinding machine；Quan Tie
The Anshan type lean octahedral iron ore mine tailing of grade 7~13% feed a stage magnetic separator carry out a stages of magnetic separation, the one of magnetic iron content < 0.8%
Stage magnetic separator tailing throws tail, and a stage magnetic separator concentrate of full Iron grade 15~28% feeds a cyclone and carries out scalping；One
Secondary classification sand setting feeds a grinding machine and carries out an ore grinding, and an ore grinding ore discharge returns to a stages of magnetic separation and constitutes grind grading, granularity
Two stages of magnetic separation grinding-classification operations are fed for the scalping overflow of -200 mesh contents 90%.
The two stages of magnetic separation grinding-classification operations are made of two stage magnetic separators, swirl flow device and secondary mill；Once
Grading Overflow feeds two stage magnetic separators and carries out two stages of magnetic separation, and the two stage magnetic separator tailings of magnetic iron content < 0.8% throw tail, Quan Tie
Two stage magnetic separator concentrate of grade 45~50% feed swirl flow device and carry out secondary grading；Secondary grading sand setting feeds secondary grinding
Machine carries out secondary grinding, and secondary grinding ore discharge returns to two stages of magnetic separation and constitutes grind grading, and granularity is the two of -400 mesh content >=90%
Secondary Grading Overflow feeds final magnetic concentration working.
The final magnetic concentration working is by three stage magnetic separators, cleaning magnetic separator and scans magnetic separator and forms；Secondary grading overflows
Stream feeds three stage magnetic separators and carries out three stages of magnetic separation, and the three stage magnetic separator tailings of magnetic iron content < 0.8% throw tail, full Iron grade 55
It is selected that~60% three stage magnetic separator concentrate feed cleaning magnetic separator progress；Cleaning magnetic separator tailing, which is fed, scans magnetic separator progress
It scans, the magnetic separator tailings of scanning of magnetic iron content < 0.8% throw tail, scan magnetic separator concentrate and return to secondary grading, full Iron grade
64% or more cleaning magnetic separator concentrate is final concentrate product；One stage magnetic separator tailing, two stage magnetic separator tailings, three stages of magnetic separation
It tail mine and scans magnetic separator tailings and merges into true tailings.
One stage magnetic separator is magnetic field magnetic separator in adverse current type, and 240 °~260 ° of Guide canel, drum surface is average
Magnetic field strength is that wherein to scan area's drum surface average field-strength be the mT of 390 mT~400, adverse current type under casing to 290 mT~300mT
Roughing area and selected area, which are respectively equipped with, dispels water installations and multistage concentrate rinsing water installations；Grinding machine is long cylinder overflow
Type ball mill.
Two stage magnetic separators are magnetic field magnetic separator in adverse current type, and 240 °~260 ° of Guide canel, drum surface is average
Magnetic field strength is 240 mT~250mT, wherein scanning 380 mT of mT~400 of area's drum surface average field-strength, adverse current type under casing is thick
Constituency and selected area, which are respectively equipped with, dispels water installations and multistage concentrate rinsing water installations；The secondary mill is vertical mixing mill
Machine.
Three stage magnetic separators are magnetic field magnetic separator in adverse current type, identical as two stage magnetic separators；The selected magnetic separation
Machine is Full-automatic electromagnetic elutriation magnetic separator；The described magnetic separator of sweeping is magnetic field magnetic separator in adverse current type, 240 ° of Guide canel~
260 °, drum surface average field strength be 340 mT~350mT, wherein scan area's drum surface average field-strength be 440 mT~
450 mT, adverse current type under casing roughing area are equipped with and dispel water installations.
The invention has the advantages that
1) original disc type recycling machine is replaced using magnetic field magnetic separator in big cornerite, adverse current type, while also sorts and sets as one section
It is standby, while raising sorts efficiency, mining tailing effect is improved, further reduced magnetic iron content in true tailings；
2) ore grinding of the present invention uses vertical stirring mill using long cartridge type grinding machine, secondary grinding, improves fine grinding efficiency, protects
Ore milling product granularity is demonstrate,proved；
3) grind grading and secondary grinding classification of the invention is all made of grind grading, a grinding machine ore discharge and secondary mill row
Mine first returns to a stages of magnetic separation respectively and two stages of magnetic separation are sorted, and can dish out a large amount of qualified tailings in advance, is then classified again,
Reduce each section of grind grading circulating load, improves grind grading efficiency；
4) each stage magnetic separator of the present invention and magnetic separator is scanned using big cornerite, the middle magnetic of high gradient magnetic system magnetic pole and adverse current type under casing
Field magnetic separator, cleaning magnetic separator use Full-automatic electromagnetic elutriation magnetic separator, and such organic assembling had both reduced magnetic in tailing
The loss of iron in turn ensures final concentrate grade.
Detailed description of the invention
Fig. 1 is that process flow chart is selected in Anshan type lean octahedral iron ore mine tailing high efficiente callback again.
Specific embodiment
Present invention will be further explained below with reference to the attached drawings and examples.
Technique is selected in a kind of Anshan type lean octahedral iron ore mine tailing high efficiente callback of the invention again as shown in Figure 1:, comprising: by full iron
The Anshan type lean octahedral iron ore magnetic tailing that grade is 7~13% feeds tailing high efficiente callback and selects technique again, it is characterised in that: the work
Skill is successively made of following operations: a stages of magnetic separation grinding-classification operation, two stages of magnetic separation grinding-classification operations and final magnetic concentration working；
The one stages of magnetic separation grinding-classification operation handles the Anshan type lean octahedral iron ore magnetic tailing that full Iron grade is 7~13%, described
Two stages of magnetic separation grinding-classification operations handle scalping overflow, and the final magnetic concentration working handles secondary grading overflow.
1) a stages of magnetic separation grinding-classification operation
One stages of magnetic separation grinding-classification operation is made of a stage magnetic separator, a cyclone and a grinding machine；Full Iron grade 7~13%
Anshan type lean octahedral iron ore mine tailing feed a stage magnetic separator carry out a stages of magnetic separation, a stages of magnetic separation tail of magnetic iron content < 0.8%
Mine throws tail, and a stage magnetic separator concentrate of full Iron grade 15~28% feeds a cyclone and carries out scalping；Scalping sand setting
It feeds a grinding machine and carries out an ore grinding, an ore grinding ore discharge returns to a stages of magnetic separation and constitutes grind grading, and granularity is that -200 mesh contain
The scalping overflow of amount 90% feeds two stages of magnetic separation grinding-classification operations.
One stage magnetic separator is magnetic field magnetic separator in adverse current type, and 240 °~260 ° of Guide canel, drum surface average magnetic field is strong
Degree is 300mT, wherein scanning area's drum surface average field-strength is 400 mT, adverse current type under casing roughing area and selected area are respectively equipped with
Dispel water installations and multistage concentrate rinsing water installations；Grinding machine is long cylinder overflowball mill.
2) two stages of magnetic separation grinding-classification operation
Two stages of magnetic separation grinding-classification operations are made of two stage magnetic separators, swirl flow device and secondary mill；Scalping overflow is given
Enter two stage magnetic separators and carry out two stages of magnetic separation, the two stage magnetic separator tailings of magnetic iron content < 0.8% throw tail, full Iron grade 45~50%
Two stage magnetic separator concentrate feed swirl flow device carry out secondary grading；Secondary grading sand setting feeds secondary mill and carries out secondary grinding
Mine, secondary grinding ore discharge return to two stages of magnetic separation and constitute grind grading, and granularity is that the secondary grading overflow of -400 mesh content >=90% is given
Enter final magnetic concentration working.
Two stage magnetic separators are magnetic field magnetic separator in adverse current type, and 240 °~260 ° of Guide canel, drum surface average magnetic field is strong
Degree is 250mT, wherein scanning area's drum surface average field-strength is~400 mT, adverse current type under casing roughing area and selected area are set respectively
Dispel water installations and multistage concentrate rinsing water installations；Secondary mill is vertical stirring mill.
3) final magnetic concentration working
Final magnetic concentration working is by three stage magnetic separators, cleaning magnetic separator and scans magnetic separator and forms；Secondary grading overflow feeds three sections
Magnetic separator three stages of magnetic separation of progress, the three stage magnetic separator tailings throwing tail of magnetic iron content < 0.8%, three sections of full Iron grade 55~60%
It is selected that magnetic separator concentrate feeds cleaning magnetic separator progress；Cleaning magnetic separator tailing, which is fed, to be scanned magnetic separator and is scanned, Armco magnetic iron
The magnetic separator tailings of scanning of content < 0.8% throw tail, scan magnetic separator concentrate and return to secondary grading, the essence of complete 64% or more Iron grade
Selecting magnetic separator concentrate is final concentrate product；It one stage magnetic separator tailing, two stage magnetic separator tailings, three stage magnetic separator tailings and scans
Magnetic separator tailings merge into true tailings.
Three stage magnetic separators are magnetic field magnetic separator in adverse current type, identical as two stage magnetic separators；The cleaning magnetic separator is complete
Automatic electromagnetic elutriation magnetic separator, fixed magnetic field, circulation magnetic field and compensation magnetic field can require to be adjusted flexibly according to sorting index；Institute
The magnetic separator of sweeping stated is magnetic field magnetic separator in adverse current type, and 240 °~260 ° of Guide canel, drum surface average field strength is
350mT, wherein scanning area's drum surface average field-strength is 450 mT, adverse current type under casing roughing area is equipped with and dispels water installations.
Ore grinding of the present invention uses vertical stirring mill using long cartridge type grinding machine, secondary grinding, improves fine grinding efficiency,
It ensure that ore milling product granularity；And a grind grading and secondary grinding classification are all made of grind grading, a grinding machine ore discharge
A stages of magnetic separation is first returned respectively with secondary mill ore discharge and two stages of magnetic separation are sorted, a large amount of qualified tailings of dishing out in advance, then
It is classified again, reduces each section of grind grading circulating load, improve grind grading efficiency；
Each stage magnetic separator of the present invention uses the middle magnetic field of big cornerite, high gradient magnetic system magnetic pole and adverse current type under casing with magnetic separator is scanned
Magnetic separator, cleaning magnetic separator use Full-automatic electromagnetic elutriation magnetic separator, and such organic assembling had both reduced Armco magnetic iron in tailing
Loss, in turn ensure final concentrate grade.
Claims (7)
1. technique is selected in a kind of Anshan type lean octahedral iron ore mine tailing high efficiente callback again, comprising: the Anshan type for being 7~13% by full Iron grade
Chromium depleted zone magnetic tailing feeds tailing high efficiente callback and selects technique again, it is characterised in that: the technique is successively made of following operations:
One stages of magnetic separation grinding-classification operation, two stages of magnetic separation grinding-classification operations and final magnetic concentration working；The one stages of magnetic separation ore grinding point
Grade operation handles the Anshan type lean octahedral iron ore magnetic tailing that full Iron grade is 7~13%, the two stages of magnetic separation grinding-classification operations
Scalping overflow is handled, the final magnetic concentration working handles secondary grading overflow.
2. technique is selected in a kind of Anshan type lean octahedral iron ore mine tailing high efficiente callback according to claim 1 again, it is characterised in that institute
The stages of magnetic separation grinding-classification operation stated is made of a stage magnetic separator, a cyclone and a grinding machine；Full Iron grade 7~13%
Anshan type lean octahedral iron ore mine tailing feed a stage magnetic separator carry out a stages of magnetic separation, a stages of magnetic separation tail of magnetic iron content < 0.8%
Mine throws tail, and a stage magnetic separator concentrate of full Iron grade 15~28% feeds a cyclone and carries out scalping；Scalping sand setting
It feeds a grinding machine and carries out an ore grinding, an ore grinding ore discharge returns to a stages of magnetic separation and constitutes grind grading, and granularity is that -200 mesh contain
The scalping overflow of amount 90% feeds two stages of magnetic separation grinding-classification operations.
3. technique is selected in a kind of Anshan type lean octahedral iron ore mine tailing high efficiente callback according to claim 1 again, it is characterised in that institute
The two stages of magnetic separation grinding-classification operations stated are made of two stage magnetic separators, swirl flow device and secondary mill；Scalping overflow is given
Enter two stage magnetic separators and carry out two stages of magnetic separation, the two stage magnetic separator tailings of magnetic iron content < 0.8% throw tail, full Iron grade 45~50%
Two stage magnetic separator concentrate feed swirl flow device carry out secondary grading；Secondary grading sand setting feeds secondary mill and carries out secondary grinding
Mine, secondary grinding ore discharge return to two stages of magnetic separation and constitute grind grading, and granularity is that the secondary grading overflow of -400 mesh content >=90% is given
Enter final magnetic concentration working.
4. technique is selected in a kind of Anshan type lean octahedral iron ore mine tailing high efficiente callback according to claim 1 again, it is characterised in that institute
The final magnetic concentration working stated is by three stage magnetic separators, cleaning magnetic separator and scans magnetic separator and forms；Secondary grading overflow feeds three sections
Magnetic separator three stages of magnetic separation of progress, the three stage magnetic separator tailings throwing tail of magnetic iron content < 0.8%, three sections of full Iron grade 55~60%
It is selected that magnetic separator concentrate feeds cleaning magnetic separator progress；Cleaning magnetic separator tailing, which is fed, to be scanned magnetic separator and is scanned, Armco magnetic iron
The magnetic separator tailings of scanning of content < 0.8% throw tail, scan magnetic separator concentrate and return to secondary grading, the essence of complete 64% or more Iron grade
Selecting magnetic separator concentrate is final concentrate product；It one stage magnetic separator tailing, two stage magnetic separator tailings, three stage magnetic separator tailings and scans
Magnetic separator tailings merge into true tailings.
5. technique is selected in a kind of Anshan type lean octahedral iron ore mine tailing high efficiente callback according to claim 2 again, it is characterised in that institute
The stage magnetic separator stated is magnetic field magnetic separator in adverse current type, and 240 °~260 ° of Guide canel, drum surface average field strength is
290 mT~300mT, wherein scanning area's drum surface average field-strength is the mT of 390 mT~400, adverse current type under casing roughing area and essence
Constituency, which is respectively equipped with, dispels water installations and multistage concentrate rinsing water installations；Grinding machine is long cylinder overflowball mill.
6. technique is selected in a kind of Anshan type lean octahedral iron ore mine tailing high efficiente callback according to claim 3 again, it is characterised in that institute
Two stage magnetic separators stated are magnetic field magnetic separator in adverse current type, and 240 °~260 ° of Guide canel, drum surface average field strength is
240 mT~250mT, wherein scanning area's drum surface average field-strength is the mT of 380 mT~400, adverse current type under casing roughing area and essence
Constituency, which is respectively equipped with, dispels water installations and multistage concentrate rinsing water installations；The secondary mill is vertical stirring mill.
7. technique is selected in a kind of Anshan type lean octahedral iron ore mine tailing high efficiente callback according to claim 4 again, it is characterised in that institute
Three stage magnetic separators stated are magnetic field magnetic separator in adverse current type, identical as two stage magnetic separators；The cleaning magnetic separator is full-automatic
Electromagnetism elutriation magnetic separator；The described magnetic separator of sweeping is magnetic field magnetic separator in adverse current type, 240 °~260 ° of Guide canel, drum surface
Average field strength is 340 mT~350mT, wherein scanning area's drum surface average field-strength is the mT of 440 mT~450, adverse current type
Under casing roughing area is equipped with and dispels water installations.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111729756A (en) * | 2020-07-07 | 2020-10-02 | 中冶北方（大连）工程技术有限公司 | Anshan type low-grade magnetite tailing recovery process |
| CN113713959A (en) * | 2021-07-29 | 2021-11-30 | 四川谨而睿科技有限公司 | Method for improving fineness of vanadium titano-magnetite iron ore concentrate and keeping coarse granularity of tailings |
| CN114130531A (en) * | 2021-12-09 | 2022-03-04 | 太原钢铁(集团)有限公司 | Method for improving utilization coefficient of primary ball mill in grinding and selecting process |
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Application publication date: 20190115 |