CN108993756A - Semi-Autogenous pre-selection-the stage grinding of magnetic iron ore-tower grinds magnetic separation process - Google Patents
Semi-Autogenous pre-selection-the stage grinding of magnetic iron ore-tower grinds magnetic separation process Download PDFInfo
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- CN108993756A CN108993756A CN201810728872.8A CN201810728872A CN108993756A CN 108993756 A CN108993756 A CN 108993756A CN 201810728872 A CN201810728872 A CN 201810728872A CN 108993756 A CN108993756 A CN 108993756A
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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
- B03B7/00—Combinations of wet processes or apparatus with other processes or apparatus, e.g. for dressing ores or garbage
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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
- B03B1/00—Conditioning for facilitating separation by altering physical properties of the matter to be treated
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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
Abstract
The present invention relates to a kind of magnetic iron ore Semi-Autogenous pre-selection -- stage grinding -- towers to grind magnetic separation process, including coarse crushing operation, including coarse crushing operation, it is characterized in that coarse crushing operation product sequence feeds following operations: pre-selection magnetic concentration working, one section of closed circuit grinding classification operation, one stages of magnetic separation operation, two sections of closed circuit grinding classification operations and continuous three stages of magnetic separation operation, the continuous three stages of magnetic separation operation is two stages of magnetic separation operations, two stages of magnetic separation operations and four stages of magnetic separation operations, selected magnetic concentration working concentrate is final concentrate, preselect magnetic concentration working tailing, one stages of magnetic separation operation tailing, two stages of magnetic separation operation tailings and three stages of magnetic separation operation tailings merge into comprehensive tailing.The invention has the advantages that 1) use closed circuit Semi-Autogenous pre-selection operation, two section of one closed circuit crushing screening operation is eliminated；2) using two sections of closed circuit grinding operations of cyclone and tower grinding machine composition, spun yarn evenness operation and 5 stages of magnetic separation operations are eliminated；3) simplification of flowsheet reduces beneficiation cost.
Description
Technical field
The invention belongs to technical field of beneficiation, and in particular to a kind of magnetic iron ore that process flow greatly simplifies is Semi-Autogenous pre-
-- stage grinding -- tower is selected to grind magnetic separation process.
Background technique
In mining processing industry, processing magnetic iron ore generally use " coarse broken, the broken, thin broken screening, stage grinding-dusting cover again
Mill-single magnetic separation " process flow sorts.Specific process flow is usual are as follows: raw ore (1000-0mm) by it is rough and torn, in break, it is thin
After broken screening, crushed product size reaches 12-0 mm, wherein in break, thin broken screening operation accounts for 25% of beneficiation cost or so, at
This is higher, and the crushed product of 12-0 mm is after the closed circuit grinding that primary grinding and scalping form, scalping overflow grain
Degree reaches -200 mesh contents 58 ~ 60%, and scalping overflow feeds a stage magnetic separator and sorts, and a stages of magnetic separation concentrate feeds secondary point
The secondary closed circuit grinding system of grade cyclone and secondary ball milling composition, secondary grading overflow product granularity reach -200 mesh contents
90%, for secondary grading overflow product after one section of dehydration slot, two stage magnetic separators sort, two stages of magnetic separation concentrate feed one section of dusting cover
Operation, after dehydration magnetic separator dehydration, dehydration magnetic separator concentrate feeds three sections of ball mills and regrinds one section of dusting cover oversize, regrinds
Product granularity reaches -200 mesh content 85%-90% afterwards, regrinds rear product and feeds two sections of dehydration slots, three stage magnetic separators and sorts, and three sections
Magnetic separator concentrate feeds two sections of dusting cover operations, and two sections of dusting cover oversizes feed three sections of ball mills after returning to dehydration magnetic separator dehydration
It regrinds.Under one section of dusting cover sieve, two sections of dusting covers sieves it is lower merge feed three sections of dehydration slots, four stage magnetic separators, four sections of dehydration slots, four sections take off
Sink concentrate is final concentrate, and grade is 67% or more；One stages of magnetic separation tailing, two stages of magnetic separation tailings, takes off one section of dehydration slot tailing
Water magnetic separator tailings, two sections of dehydration slot tailings, three stages of magnetic separation tailings, three sections of dehydration slot tailings, four stages of magnetic separation tailings, four sections of dehydrations
Slot tailing is combined into true tailings, grade 10-11%.Typically broken ore grinding selecting process is shown in Fig. 1.
Magnetic iron ore is selected using " Three stage crushing with single closed circuit stage, the single magnetic separation process of stage grinding-spun yarn evenness-" process flow
Not, there are three sections of broken, one section of screenings in crushing circuit, have three sections of grinding operations, two sections of dusting cover operations, nine sections of magnetic in Beneficiation flowsheet
Be elected to be industry, hence it is evident that there are following problem and shortage: 1) it is more to be crushed number of segment, sorts that number of segment is more, and process flow complexity is tediously long；2)
Production operation control management is inconvenient, and grinding machine is regrinded again for a large amount of returns measured on two sections of dusting cover sieves especially in Beneficiation flowsheet, is easy to make
Unstable at process, index easily fluctuates, and influences normally to produce；3) drawbacks such as beneficiation cost is higher.
Summary of the invention
The object of the present invention is to provide a kind of Semi-Autogenous pre-selections of the magnetic iron ore that process flow greatly simplifies -- stage grinding --
Tower grinds magnetic separation process.
The present invention is implemented as follows:
A kind of magnetic iron ore Semi-Autogenous pre-selection -- stage grinding -- tower of the invention grinds magnetic separation process, including coarse crushing operation, special
Sign is that coarse crushing operation product sequence feeds following operations: the Semi-Autogenous operation of wet type, and the Semi-Autogenous product of wet type is fed in advance
Magnetic concentration working, the concentrate of preparatory magnetic concentration working feed one section of closed circuit grinding classification operation, and the overflow of one section of closed circuit grinding classification is given
Enter a stages of magnetic separation operation, the concentrate of a stages of magnetic separation operation feeds two sections of closed circuit grinding classification operations, and two sections of closed circuit grinding classifications are made
The overflow of industry feeds continuous three stages of magnetic separation operation, and the continuous three stages of magnetic separation operation is two stages of magnetic separation operations, three stages of magnetic separation work
Industry and selected magnetic concentration working, selected magnetic concentration working concentrate are final concentrate, and selected magnetic concentration working concentrate tailing is as middling recurrence
Two sections of closed circuit grinding operations, preparatory magnetic concentration working tailing, a stages of magnetic separation operation tailing, two stages of magnetic separation operation tailings and three stages of magnetic separation
Operation tailing merges into comprehensive tailing.
For the preparatory magnetic concentration working using pre-selection magnetic separator, the magnetic field strength that pre-selection magnetic separator uses is described for 240Tm
A stages of magnetic separation operation use magnetic field strength for a stage magnetic separator of 160Tm, two stages of magnetic separation operations use magnetic field strength for 140Tm
Two stage magnetic separators, three stages of magnetic separation operation magnetic field strengths be 120Tm three stage magnetic separators, selected magnetic concentration working use intensity for
The cleaning magnetic separator of 110Tm.
It is 30%~32% that the Semi-Autogenous operation of wet type, which is by grade, and granularity is that the coarse crushing operation ore discharge of the mm of 300mm~0 is given
Enter the closed circuit Semi-Autogenous operation being made of wet type semi-autogenous mill and screening plant, obtains the Semi-Autogenous production of wet type that granularity is -3mm
Object.
The grade for preselecting magnetic separator concentrate is 34%~37%, and the grade for preselecting magnetic separator tailings is 7.5%~8.5%.
One section of closed circuit grinding classification operation is one section of closed circuit grinding being made of one section of cyclone and one section of grinding machine
Operation obtains one section of closed circuit grinding classification overflow that granularity is -200 mesh content 65%-70%.
The grade of one stage magnetic separator concentrate is 50%-52%, and the grade of a stage magnetic separator tailing is one section of 6.5%~7.5%
Magnetic separator tailings.
Two sections of closed circuit grinding classification operations are two sections of closed circuit mills being made of two sections of cyclones and two sections of tower grinding machines
Mine operation obtains two sections of closed circuit grinding operation overflows that granularity is -325 mesh 90%~95%；
The grade of two stage magnetic separator concentrate is 62.8%~63.8%, and the grades of two stage magnetic separator tailings is 6.0%~7.5%, three sections
The grade of magnetic separator concentrate is 64.5%~65.5%, and the grade of three stage magnetic separator tailings is 12.5%~13.5%, selected magnetic separation
Machine concentrate grade is 67%-67.5%, and yield is that yield is 37%-41%, and cleaning magnetic separator tail is 22%~24% with for chats grade.
The grade of the synthesis tailing is 7.4%-9.5%, yield 63%-59%.
The tower grinding machine is 0.05m3Use for laboratory tower grinding machine.
Analysis on its rationality of the invention:
In the Three stage crushing with single closed circuit stage process of the prior art, after ore need to first pass through coarse broken, the broken, thin broken screening, granularity reaches
Primary grinding operation can be just fed to 92% or more -12mm grain size content.It is broken in, in thin broken and screening operation, if using closing
It is broken in the Semi-Autogenous operation replacement in road, thin broken and the rough and torn ore discharge of screening operation processing, product granularity can reach -3mm hereinafter, primary
The mill feed size of ball mill is reduced to 3-0 mm by 12-0 mm, which can be thrown using wet type pre-selecting and remove bulky grain qualification tail
Mine reduces the treating capacity of primary ball mill, improves the Beneficiation Feed Grade of ore, and the processing capacity and ore grinding for improving a grinding machine produce
The fineness of product, grinding fineness can be increased to -200 mesh 65%-70% by -200 original mesh content 55%-58%.
In the Fine screening-regrinding technology of the prior art, one section of dusting cover sieve is upper, two sections of dusting covers sieve and feed open circuit ball mill
It regrinds, is not reached requirement if regrinding granularity, will lead to two sections of dusting covers and sieve upper back amount increase, form vicious circle, influence to give birth to
Production and sorting index；If at the closed circuit grinding operation that a stages of magnetic separation concentrate is directlyed adopt to classifying cyclone and tower grinding machine composition
Reason, makes two sections of cyclone overflow product granularities reach -325 mesh content 90%-95%, two sections of cyclone overflows are using several stages of magnetic separation
Operation sorts, and can get qualification grade concentrate.Spun yarn evenness operation can be not only eliminated in this way, but also can reduce multistage magnetic separation work
Industry, simplification of flowsheet reduce beneficiation cost.
The present invention compared with technique compared to the advantages of be:
1) closed circuit Semi-Autogenous pre-selection operation is introduced process by the present invention, eliminates two section of one closed circuit crushing screening operation, one section of ball
The mill feed size of grinding machine is reduced to 3-0 mm by 12-0 mm, and the grade that enters to grind of one section of ball mill improves 4 ~ 5 percentage points, enters
Mill amount reduces 20% or so, improves the processing capacity and grinding fineness of one section of ball mill.
2) each section of different work is different using the magnetic field strength of magnetic separator, effectively in the concentrate product for improving each section of sorting operation
Position, while using the difference of magnetic field strength, gangue mineral and lean intergrowth that jettisoning is mingled with.
3) two sections of closed circuit grinding operations introducing process that the present invention forms " classifying cyclone and tower grinding machine ", a stages of magnetic separation
Machine concentrate directly feeds two sections of closed circuit grinding operations, and two sections of cyclone overflow granularities reach -325 mesh content 90%-95%, using
3 times magnetic concentration working sorts, and obtains qualified grade concentrate, reduces one section of open-circuit grinding operation, 5 stages of magnetic separation operations, two sections of dusting covers
Operation.
4) present invention enormously simplifies existing process flow, realizes that short route sorts, considerably reduces beneficiation cost,
Remarkable in economical benefits.
Detailed description of the invention
Fig. 1 is existing " Three stage crushing with single closed circuit stage, the single magnetic separation process of stage grinding-spun yarn evenness-" flow chart.
Fig. 2 is " magnetic iron ore Semi-Autogenous pre-selection -- stage grinding -- tower grinds magnetic separation process " flow chart of the invention.
Specific embodiment
Present invention will be further explained below with reference to the attached drawings and examples.
As shown in Figure 2: a kind of magnetic iron ore Semi-Autogenous pre-selection -- stage grinding -- tower of the invention grinds magnetic separation process, including thick
Crushing operation, it is characterised in that further include the following steps:
1) by grade be 30%~32%, granularity be the mm of 300mm~0 coarse crushing operation ore discharge feed by wet type semi-autogenous mill with
The closed circuit Semi-Autogenous operation that screening plant is constituted obtains the Semi-Autogenous product of wet type that granularity is -3mm；
2) the Semi-Autogenous product of wet type is fed into pre-selection magnetic separator, preselects the magnetic field strength 240Tm of magnetic separator, obtaining grade is 34%
The pre-selection magnetic separator tailings that~37% pre-selection magnetic separator concentrate and grade is 7.5%~8.5%；
3) magnetic separator concentrate will be preselected and feeds one section of closed circuit grinding operation that one section of cyclone and one section of grinding machine are constituted, obtain granularity
For one section of closed circuit grinding operation overflow of -200 mesh content 65%-70%；
4) one section of closed circuit grinding operation overflow is fed into a stage magnetic separator, the magnetic field strength 160Tm of a stage magnetic separator obtains grade
The stage magnetic separator tailing that a stage magnetic separator concentrate and grade for 50%-52% are 6.5%~7.5%；
5) a stage magnetic separator concentrate is fed into two sections of closed circuit grinding operations that two sections of cyclones and two sections of tower grinding machines are constituted, it is described
Tower grinding machine is 0.05m3Use for laboratory tower grinding machine obtains two sections of closed circuit grinding operation overflows that granularity is -325 mesh 90%~95%；
6) two sections of closed circuit grinding operation overflows are fed into two stage magnetic separators, the magnetic field strength 140Tm of two stage magnetic separators obtains two sections
The two stage magnetic separator tailings that magnetic separator concentrate and grade are 6.0%~7.5%；Two stage magnetic separator concentrate are fed into three stage magnetic separators,
The magnetic field strength 120Tm of three stage magnetic separators obtains three stage magnetic separator concentrate and grade as 12.5%~13.5% three stage magnetic separators
Tailing；Three stage magnetic separator concentrate are fed into cleaning magnetic separator, the magnetic field strength 110Tm of cleaning magnetic separator, acquisition grade is 67%-
67.5%, yield is the cleaning magnetic separator concentrate and cleaning magnetic separator chats of 37%-41%；Two sections of cleaning magnetic separator middling recurrence are closed
Road grinding operation, cleaning magnetic separator concentrate are final concentrate product；
7) pre-selection magnetic separator tailings, a stage magnetic separator tailing, two stage magnetic separator tailings and three stage magnetic separator tailings are merged into product
Position is 7.4%-9.5%, and yield is the synthesis tailing of 63%-59%.
Embodiment 1:
As shown in Figure 2: a kind of magnetic iron ore Semi-Autogenous pre-selection -- stage grinding -- tower of the invention grinds magnetic separation process, including coarse crushing
Operation, it is characterised in that further include the following steps:
It 1) is 31.34% by grade, granularity is that the coarse crushing operation ore discharge of the mm of 300mm~0 is fed by wet type semi-autogenous mill and sieve
The closed circuit Semi-Autogenous operation that subset is constituted obtains the Semi-Autogenous product of wet type that granularity is -3mm；
2) the Semi-Autogenous product of wet type is fed into pre-selection magnetic separator, the pre-selection magnetic separator concentrate and grade that acquisition grade is 36.5% are
7.81% pre-selection magnetic separator tailings；
3) magnetic separator concentrate will be preselected and feeds one section of closed circuit grinding operation that one section of cyclone and one section of grinding machine are constituted, obtain granularity
For the scalping overflow of -200 mesh contents 70%；
4) scalping overflow is fed into a stage magnetic separator, the stage magnetic separator concentrate and grade for obtaining grade 51.2% are 6.52%
A stage magnetic separator tailing；
5) a stage magnetic separator concentrate is fed into two sections of closed circuit grinding operations that two sections of cyclones and two sections of tower grinding machines are constituted, it is described
Tower grinding machine is 0.05m3Use for laboratory tower grinding machine obtains the secondary grading overflow that granularity is -325 mesh 95%；
6) secondary grading overflow is fed into two stage magnetic separators, obtains two stage magnetic separator concentrate and grade as 6.15% two stages of magnetic separation
Tail mine；Two stage magnetic separator concentrate are fed into three stage magnetic separators, three stage magnetic separator concentrate of acquisition and grade are three sections of 13.95%
Magnetic separator tailings；Three stage magnetic separator concentrate are fed into cleaning magnetic separator, obtaining grade is 67.15%, yield be 40.07% it is selected
Magnetic separator concentrate and cleaning magnetic separator chats；The two sections of closed circuit grinding operations of higher return of cleaning magnetic separator chats grade, selected magnetic
Selecting machine concentrate is final concentrate product；
7) pre-selection magnetic separator tailings, a stage magnetic separator tailing, two stage magnetic separator tailings and three stage magnetic separator tailings are merged into product
Position is 7.40%, the synthesis tailing that yield is 59.93%.
Claims (10)
1. a kind of Semi-Autogenous pre-selection of magnetic iron ore -- stage grinding -- tower grinds magnetic separation process, including coarse crushing operation, it is characterised in that
Coarse crushing operation product sequence feeds following operations: the Semi-Autogenous operation of wet type, and the Semi-Autogenous product of wet type feeds preparatory magnetic separation and makees
Industry, the concentrate of preparatory magnetic concentration working feed one section of closed circuit grinding classification operation, and the overflow of one section of closed circuit grinding classification feeds one section
Magnetic concentration working, the concentrate of a stages of magnetic separation operation feed two sections of closed circuit grinding classification operations, and two sections of closed circuit grinding classification operations are overflow
Stream feeds continuous three stages of magnetic separation operation, and the continuous three stages of magnetic separation operation is two stages of magnetic separation operations, three stages of magnetic separation operations and essence
Magnetic concentration working is selected, selected magnetic concentration working concentrate is final concentrate, and selected magnetic concentration working concentrate tailing is closed as two sections of middling recurrence
Road grinding operation, preparatory magnetic concentration working tailing, a stages of magnetic separation operation tailing, two stages of magnetic separation operation tailings and three stages of magnetic separation job trailers
Mine merges into comprehensive tailing.
2. the Semi-Autogenous pre-selection-stage grinding of magnetic iron ore according to claim 1-tower grinds magnetic separation process, the preparatory magnetic
Industry is elected to be using CTS600 × 600mm downstream-type magnetic separator, preselects magnet separator magnetic field intensity 240Tm, a stages of magnetic separation is made
Industry uses magnetic field strength for a stage magnetic separator of 160Tm, and two stages of magnetic separation operations use magnetic field strength are as follows: two stages of magnetic separation of 140Tm
Machine, three stages of magnetic separation operation magnetic field strengths are as follows: three stage magnetic separators of 120Tm, selected magnetic concentration working use intensity are as follows: the essence of 110Tm
Select magnetic separator.
3. the Semi-Autogenous pre-selection-stage grinding of magnetic iron ore according to claim 1-tower grinds magnetic separation process, the wet type half
It is 30%~32% that autogenous grinding operation, which is by grade, and granularity feeds Semi-Autogenous by wet type for the coarse crushing operation ore discharge of the mm of 300mm~0
The closed circuit Semi-Autogenous operation that machine and screening plant are constituted obtains the Semi-Autogenous product of wet type that granularity is -3mm.
4. the Semi-Autogenous pre-selection-stage grinding of magnetic iron ore according to claim 2-tower grinds magnetic separation process, it is characterised in that pre-
The grade for selecting magnetic separator concentrate is 34%~37%, and the grade for preselecting magnetic separator tailings is 7.5%~8.5%.
5. the Semi-Autogenous pre-selection of magnetic iron ore -- stage grinding -- tower according to claim 1 grinds magnetic separation process, it is characterised in that
One section of closed circuit grinding classification operation is one section of closed circuit grinding operation being made of one section of cyclone and one section of grinding machine, is obtained
Granularity is one section of closed circuit grinding classification overflow of -200 mesh content 65%-70%.
6. the Semi-Autogenous pre-selection of magnetic iron ore -- stage grinding -- tower according to claim 2 grinds magnetic separation process, it is characterised in that
The grade of one stage magnetic separator concentrate is 50%-52%, the stages of magnetic separation tail that the grade of a stage magnetic separator tailing is 6.5%~7.5%
Mine.
7. the Semi-Autogenous pre-selection of magnetic iron ore -- stage grinding -- tower according to claim 1 grinds magnetic separation process, it is characterised in that
Two sections of closed circuit grinding classification operations are two sections of closed circuit grinding operations being made of two sections of cyclones and two sections of tower grinding machines, are obtained
Obtain two sections of closed circuit grinding operation overflows that granularity is -325 mesh 90%~95%.
8. the Semi-Autogenous pre-selection of magnetic iron ore -- stage grinding -- tower according to claim 2 grinds magnetic separation process, it is characterised in that
The grade of two stage magnetic separator concentrate is 62.8%~63.8%, and the grade of two stage magnetic separator tailings is 6.0%~7.5%, three stages of magnetic separation
The grade of machine concentrate is 64.5%~65.5%, and the grade of three stage magnetic separator tailings is 12.5%~13.5%, cleaning magnetic separator essence
Mine grade is 67%-67.5%, and yield 37%-41%, cleaning magnetic separator tail is 22%~24% with for chats grade.
9. the Semi-Autogenous pre-selection of magnetic iron ore -- stage grinding -- tower according to claim 1 grinds magnetic separation process, it is characterised in that
The grade of the synthesis tailing is 7.4%-9.5%, yield 63%-59%.
10. the Semi-Autogenous pre-selection of a kind of magnetic iron ore -- stage grinding -- tower according to claim 1 grinds magnetic separation process, feature
It is that the tower grinding machine is 0.05m3Use for laboratory tower grinding machine.
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Cited By (6)
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| CN109675711A (en) * | 2019-01-08 | 2019-04-26 | 中冶北方（大连）工程技术有限公司 | A kind of magnetite beneficiation process of the processing containing fine gold mineral |
| CN110064507A (en) * | 2019-04-26 | 2019-07-30 | 内蒙古大中矿业股份有限公司 | A kind of ore-dressing technique of chromium depleted zone recycling and reusing |
| CN110694789A (en) * | 2019-11-18 | 2020-01-17 | 安徽马钢矿业资源集团有限公司 | Ore dressing method for magnetite |
| CN110898957A (en) * | 2019-11-13 | 2020-03-24 | 鞍钢集团矿业有限公司 | Particle size grading pre-selection tailing discarding process for extremely lean hematite |
| CN111068897A (en) * | 2019-12-20 | 2020-04-28 | 辽宁科技学院 | Fine particle magnetite beneficiation process |
| CN112371304A (en) * | 2020-10-22 | 2021-02-19 | 攀钢集团攀枝花钢铁研究院有限公司 | Method and system for sand setting and tailing discarding of vanadium titano-magnetite |
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| CN110064507A (en) * | 2019-04-26 | 2019-07-30 | 内蒙古大中矿业股份有限公司 | A kind of ore-dressing technique of chromium depleted zone recycling and reusing |
| CN110898957A (en) * | 2019-11-13 | 2020-03-24 | 鞍钢集团矿业有限公司 | Particle size grading pre-selection tailing discarding process for extremely lean hematite |
| CN110694789A (en) * | 2019-11-18 | 2020-01-17 | 安徽马钢矿业资源集团有限公司 | Ore dressing method for magnetite |
| CN111068897A (en) * | 2019-12-20 | 2020-04-28 | 辽宁科技学院 | Fine particle magnetite beneficiation process |
| CN112371304A (en) * | 2020-10-22 | 2021-02-19 | 攀钢集团攀枝花钢铁研究院有限公司 | Method and system for sand setting and tailing discarding of vanadium titano-magnetite |
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