CN105855019A - Ultrafine crushing-grading magnetic separation method for magnetite - Google Patents
Ultrafine crushing-grading magnetic separation method for magnetite Download PDFInfo
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- CN105855019A CN105855019A CN201610346096.6A CN201610346096A CN105855019A CN 105855019 A CN105855019 A CN 105855019A CN 201610346096 A CN201610346096 A CN 201610346096A CN 105855019 A CN105855019 A CN 105855019A
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- iron ore
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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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
- B02C23/08—Separating or sorting of material, associated with crushing or disintegrating
- B02C23/14—Separating or sorting of material, associated with crushing or disintegrating with more than one separator
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C4/00—Crushing or disintegrating by roller mills
- B02C4/02—Crushing or disintegrating by roller mills with two or more rollers
-
- 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
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- Food Science & Technology (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention provides a magnetite ultrafine crushing-grading magnetic separation method, which can efficiently separate magnetite. The invention is carried out according to the following modes: (1) the raw ore is subjected to superfine grinding by a high-pressure roller mill, and secondary classification is performed according with the granularity requirement; (2) after grading, performing low-intensity magnetic separation on the fine fraction part, separating the gangue part to obtain tailings 2, performing magnetic screening separation on the magnetite monomer and the conjoined part to obtain middlings 2 and qualified concentrates 2, performing first-stage grinding on the graded coarse fraction part, performing low-intensity magnetic separation on the coarse fraction part, separating the gangue part to obtain tailings 1, and performing magnetic screening separation on the magnetite monomer and the conjoined part to obtain middlings 1 and qualified concentrates 1; (3) the middlings 1 and 2 are returned again to the first stage grinding. The invention has high qualified rate of the concentrate and the tailings, less total amount of the obtained middlings, no need of arranging a special device for processing the middlings, energy consumption reduction, flow shortening and configuration simplification.
Description
Technical field
The present invention relates to ore dressing field, be specifically related to the beneficiation method of a kind of magnetic iron ore.
Background technology
Iron ore is the most important basic material of steel and iron industry, China's iron ore industrial type can be divided into magnetic iron ore,
Eight class such as composite ore, vanadium titano-magnetite.Being available at present in the Iron Ore Reserve utilized, magnetic iron ore reserves reach
64.56%, magnetic iron ore is still the main object of current iron ore dressing.
In Ore assorting room, the reduction of energy consumption is the key factor of sorting cost savings.The all choosings in the whole world
In the energy consumption of ore deposit, having about 5% is for crushing material.In ore dressing plant, the energy consumption of ore grinding accounts for whole crushing operation
More than 80%, it is achieved " much broken and lessmill " in ore dressing plant always both at home and abroad colleague and the focus of Experts ' Attention
One of.High-pressure roller mill is one based on comminution principle design novel ore deposit rock disintegrating apparatus, has list
Comminution energy conssumption is low, crushed product size is uniform, floor space is few, equipment operation rate high in position, is mesh
The main flow of front ore dressing field much broken and lessmill technology both at home and abroad development.High-pressure roller mill crushed product have three excellent
Point: (1) crushed product size is little, fine fraction content is high.Closed circuit crushing can make the upper limit size of crushed product
Reaching-5mm even-3mm, and 0.074mm content is more than 20% ,-0.5mm content is more than 40%.(2)
The grindability of milling product is good, and the more traditional crushed product of bond work index substantially reduces, (3) roll-in product and
Its ball milling is high (including degree of dissociation and intergrowth characteristic) at mill product liberation characteristic, especially in the case of corase grind more
For substantially.
The patent of invention of Publication No. CN103934077A discloses " a kind of efficient low-consume ultrafine grinding-ore grinding work
Skill ", by the way of raw ore-high-pressure roller mill ultrafine grinding-classification-primary grinding-sorting, carried out ore dressing, it is possible to
Significantly reduce the ore deposit amount entering primary grinding operation.This technique may be used for sorting multiple Ore, in sorting
Have the drawback that the when of magnetic iron ore that one section of sorting not yet can reach qualified concentrate containing product requirement, still need to carry out
Two-stage nitration regrinding and reconcentration, causes monomer particle the most dissociated in high-pressure roller mill crushed product again to obtain ball milling
Pulverizing, increase energy consumption disturbance indicator simultaneously, technique need this improvement further.
First the ore dressing of magnetic iron ore considers the method for low intensity magnetic separation.Magnetic field screening separator (being called for short magnetic sieve) is a kind of
The efficient separation equipment of sorting magnetic iron ore, is different from tradition weak magnetic separator and directly attracts magnetic mineral by magnetic system
The principle of grain, magnetic sieve utilizes ad hoc low low-intensity magnetic field that the magnetic mineral particles in ore pulp is magnetized into catemer,
Increasing magnetic iron ore and stone-like pulse intergrowth sedimentation velocity is poor, difference in size, it is " special that utilization simultaneously is arranged in magnetic field
With sieve " effectively stone-like pulse and intergrowth are separated, make the magnetic iron ore dissociated enter concentrate early, therefore solve
Traditional weak magnetic separator is easily mingled with stone-like pulse, it is difficult to separate the defect of intergrowth, it is achieved thereby that magnetic iron ore
Efficient separation.
Summary of the invention
It is an object of the invention to for the deficiencies in the prior art, it is provided that a kind of magnetic iron ore ultrafine grinding-classification magnetic separation side
Method, it is possible to separating magnetic iron ore efficiently, in organic efficiency height, mine tailing, effective ingredient is few, and mine tailing and concentrate close
Lattice rate is high.
The technical scheme is that and be achieved in that: a kind of magnetic iron ore ultrafine grinding-classification magnetic selection method, be by
Carry out according to following manner: (1) raw ore through high-pressure roller mill ultrafine grinding, meet granularity requirements carry out pre-
First classification；(2) after classification, fine fraction part sorts through low intensity magnetic separation, and gangue fraction is sorted out and obtains tail
Ore deposit 2, and magnetic iron ore monomer and integral part obtain chats 2 and qualified concentrate containing 2 after magnetic screening choosing, classification
After coarse fraction part first pass through primary grinding, the most again through low intensity magnetic separation separate, gangue fraction is sorted
Obtain mine tailing 1, and magnetic iron ore monomer and integral part obtain chats 1 and qualified concentrate containing after magnetic screening choosing
1；(3) chats 1 and chats 2 again return to primary grinding.
The Control granularity of described preliminary election classification is 0.5mm.
The magnetic field intensity of described low intensity magnetic separation is 120～200kA/m.
The working roll pressure of described high-pressure roller mill be 4～5MPa roller speed be 1.6m/min, roll gap is
25～30mm.
Compared with prior art, in the present invention, the qualification rate of concentrate and tailings is high, and the total amount of gained chats is less,
Need not, special device is set and processes chats, energy consumption can be reduced, shorten flow process, simplification configuration.The present invention
Utilize high-pressure roller mill that magnetite ore carries out ultrafine grinding, ultrafine grinding product pre-classification, coarse fraction part
Obtaining concentrate 1 and mine tailing 1 after " primary grinding-low intensity magnetic separation 1-magnetic screening selects 1 ", fine fraction part is direct
Concentrate 2 and mine tailing 2, chats 1 He of twice magnetic screening choosing is obtained after " screening of low intensity magnetic separation 2-magnetic selects 2 "
Return to primary grinding after chats 2 mixing and carry out regrinding and reconcentration." can receive and early receive " former following ore-dressing technique
On the basis of then, by magnetic iron ore the most dissociated in high-pressure roller mill milling product in the premise without ore grinding
Under sub-elect qualified iron ore concentrate as far as possible, thus significantly reduce the throughput entering ore grinding, can reduce by 30～
50 percentage points.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to enforcement
In example or description of the prior art, the required accompanying drawing used is briefly described, it should be apparent that, describe below
In accompanying drawing be only some embodiments of the present invention, for those of ordinary skill in the art, do not paying
On the premise of going out creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the flow chart of the present invention.
Fig. 2 is the process chart of embodiment 1.
Fig. 3 is the process chart of embodiment 2.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clearly
Chu, be fully described by, it is clear that described embodiment be only a part of embodiment of the present invention rather than
Whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art are not paying creation
The every other embodiment obtained under property work premise, broadly falls into the scope of protection of the invention.
As it is shown in figure 1, a kind of magnetic iron ore ultrafine grinding-classification magnetic selection method, carry out in the following manner:
(1) raw ore is through high-pressure roller mill ultrafine grinding, and meet granularity requirements carries out pre-classification；
(2) after classification, fine fraction part sorts through low intensity magnetic separation, and gangue fraction is sorted out and obtains mine tailing 2, and
Magnetic iron ore monomer and integral part obtain chats 2 and qualified concentrate containing 2, the coarse grain after classification after magnetic screening choosing
Level part first passes through primary grinding, separates through low intensity magnetic separation the most again, and gangue fraction is sorted out and obtains tail
Ore deposit 1, and magnetic iron ore monomer and integral part obtain chats 1 and qualified concentrate containing 1 after magnetic screening choosing；Classification
Rear section granule is directly entered low intensity magnetic separation, without ore grinding, it is possible to reduce the loss of primary grinding.
(3) chats 1 and chats 2 turn again to primary grinding.
The patent of invention of Application No. 201510490752.5 disclose " one utilize high-pressure roller mill coordinate magnetic
The efficient ore-dressing technique of field screening machine ", use Magnetic field screening separator to select for high-pressure roller mill fine fraction product
Go out the qualified iron ore concentrate of monomer dissociation.But this technique overall flow is longer, high-pressure roller mill coarse fraction is produced
The processing mode of product, when the magnet green ore that separating grade is higher, owing to coarse fraction dissociates poor, is directly entered
Entering wet magnetic separation, to be easily caused tailings grade higher, and the magnetic iron ore response rate reduces.And in the application, raw ore warp
Arriving certain particle size after crossing pulverizing, the least granule needs not move through ore grinding, can be directly entered weak magnetic
Choosing separates, and can be directly separated the mine tailing 2 (main component is stone-like pulse) reaching qualified, separates through low intensity magnetic separation
Another part magnetic iron ore monomer and the mixture of disjunctor through magnetic screening choosing, obtain qualified concentrate 2 (main
Composition is magnetic iron ore monomer) and chats 2 (main component is magnetic iron ore disjunctor).After raw ore pulverizing, classification
Bulky grain granule after primary grinding diminishes, and it is qualified to obtain through low intensity magnetic separation and magnetic screening choosing the most again
Mine tailing 1 (main component is stone-like pulse), concentrate 1 (main component is magnetic iron ore monomer) (mainly become with chats 1
Dividing is magnetic iron ore disjunctor), the main component of chats 1 and chats 2 is disjunctor, and disjunctor is attached with magnetic iron ore,
This conductors inside also has callable effective ingredient, and after again passing by primary grinding, disjunctor is by further
Processing, granule diminishes, and the effective ingredient on disjunctor is separated further.Weak magnetic is again passed by after separation
Choosing and magnetic screening choosing, in the continuous assorting room of magnetic separation, the yield of chats 1 and chats 2 does not have substantially
Increase, and in the production of prior art, create substantial amounts of disjunctor chats, in addition it is also necessary to have bigger loss
Process chats.
In the application, the Control granularity of described pre-classification is 0.5mm, and the magnetic field intensity of described low intensity magnetic separation is
120～200kA/m.The working roll pressure of described high-pressure roller mill be 4～5MPa roller speed be 1.6m/min, roller
Seam is 25～30mm.
Wherein, enter the granule of low intensity magnetic separation 1 through primary grinding and be directly entered the grain graininess of low intensity magnetic separation 2 not
Equally, the magnetic field intensity of low intensity magnetic separation 1 is higher than low intensity magnetic separation 2, and the concentrate 1 finally given and the grade of concentrate 2 are not
With, its product can create higher value.
Embodiment 1: the breaking ores that the present embodiment uses is Anhui magnetic iron ore, and full ferrum (TFe) grade is
37.78%, Armco magnetic iron (MFe) content is 32.63%, and hazardous elements S, P content are less, uses high pressure roller
Grinding machine carries out the superfine grinding of fully closed road, and the size controlling sieve aperture is 3mm, during work roll gap pressure be 4～
5MPa, roller speed is 1.6m/min, and roll gap is 25～30mm.High-pressure roller mill crushed product divides in advance
Level, control screen size be 0.5mm ,-0.5mm content be 49.58%.Magnetic iron ore high-pressure roller mill is produced
Product carry out ultrafine grinding-classification magnetic separation according to technological process shown in Fig. 2 respectively, and the magnetic field intensity of low intensity magnetic separation 1 is 190
KA/m, the magnetic field intensity of low intensity magnetic separation 2 is 175kA/m.
In the present embodiment, magnetic iron ore through high-pressure roller mill ultrafine grinding, granularity less than 3mm carrying out again
Classification；
(2) the fine fraction part (granularity is less than 0.5mm) after classification sorts through low intensity magnetic separation, gangue fraction
It is sorted out and obtains mine tailing 2, and monomer and integral part obtain chats 2 and concentrate 2 after magnetic screening choosing,
Coarse fraction part (granularity is between 0.5～3mm) after classification first passes through primary grinding, after primary grinding
The granularity granule less than 0.074mm accounts for 66.37%, separates through low intensity magnetic separation the most again, and gangue fraction is sorted
Out obtain mine tailing 1, and magnetic iron ore monomer and integral part obtain chats 1 and concentrate 1 after magnetic screening choosing.
(3) chats 1 and chats 2 turn again to primary grinding.After the present embodiment sorting, index is as shown in table 1.
As can be seen from Table 1, TFe grade can be obtained after ultrafine grinding-classification magnetic separation > the qualified ferrum of 65%
Grade after concentrate 1 and iron ore concentrate 2, concentrate 1 and concentrate 2 all merge is 65.46%, and the response rate is 89.90%.
After balance, the productivity of chats 1 is 4.79%, and the productivity of chats 2 is 4.84%.Figure it is seen that high pressure
Roller mill-0.5mm product only has 4.84% (i.e. chats 2) and enters one section of grinding machine, enter the productivity of grinding machine
Being 55.26%, relatively wholegrain level ore grinding reduces 44.78 percentage points.
Table 1 embodiment 1 ultrafine grinding-classification magnetic separation separation index
| Product | Productivity/% | Grade/% | The response rate/% |
| Concentrate 1 | 25.67 | 65.52 | 44.78 |
| Concentrate 2 | 25.93 | 65.41 | 45.12 |
| Mine tailing 1 | 29.57 | 7.98 | 6.22 |
| Mine tailing 2 | 18.81 | 7.75 | 3.88 |
| Raw ore | 100.00 | 37.59 | 100.00 |
Embodiment 2: the present embodiment uses breaking ores to be middle areas in Shandong Province's magnetic iron ore, full ferrum (TFe) grade
Being 48.56%, Armco magnetic iron (MFe) content is 46.53%, and hazardous elements S, P content are less, use height
Pressure roller grinding machine carries out the superfine grinding of fully closed road, and the size controlling sieve aperture is 6mm (the i.e. granule ore deposit less than 6mm
Grain enters classification), during work, roll gap pressure is 4～5MPa, and roller speed is 1.6m/min, and roll gap is 25～30mm.
High-pressure roller mill crushed product carries out pre-classification, and control screen size is 0.5mm, and granule is less than 0.5mm
Ore particle content is 37.51%.Magnetic iron ore high-pressure roller mill product is surpassed according to flow process shown in Fig. 3 respectively
In small, broken bits-classification magnetic separation, the magnetic field intensity of low intensity magnetic separation 1 is 159kA/m, and the magnetic field intensity of low intensity magnetic separation 2 is
144kA/m.Separation index is as shown in table 2.
Table 2 embodiment 1 ultrafine grinding-classification magnetic separation process flow chart
| Product | Productivity/% | Grade/% | The response rate/% |
| Concentrate 1 | 45.35 | 67.49 | 63.03 |
| Concentrate 2 | 23.74 | 65.49 | 32.02 |
| Mine tailing 1 | 22.11 | 7.83 | 3.56 |
| Mine tailing 2 | 8.80 | 7.64 | 1.39 |
| Raw ore | 100.00 | 48.56 | 100.00 |
As can be seen from Table 2, TFe grade can be obtained after ultrafine grinding-classification magnetic separation > the qualified ferrum of 65%
Grade after concentrate 1 and iron ore concentrate 2, concentrate 1 and concentrate 2 all merge is 66.80%, and the response rate is 95.05%.
After balance, the productivity of chats 1 is 5.56%, and the productivity of chats 2 is 4.97%.From figure 3, it can be seen that high pressure
Only having 4.97% one section of grinding machine of entrance in roller mill-0.5mm product, the productivity entering grinding machine is 67.46%, relatively
Wholegrain level ore grinding reduces 32.54 percentage points.
From embodiment 1 it will be seen that after Ping Heng the productivity difference of the productivity of chats 1 and chats 2 little, also
Having turned out in assorting room, the amount of chats 1 does not have and significantly accumulates, chats 1 and chats 2
Can again separate after primary grinding.In whole assorting room, it is not necessary in special device process is set
Ore deposit 1 and chats 2, it is possible to reduce loss.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all at this
Within bright spirit and principle, any modification, equivalent substitution and improvement etc. made, should be included in this
Within bright protection domain.
Claims (4)
1. magnetic iron ore ultrafine grinding-classification magnetic selection method, it is characterised in that carry out in the following manner:
(1) raw ore is through high-pressure roller mill ultrafine grinding, and meet granularity requirements carries out pre-classification；
(2) after classification, fine fraction part sorts through low intensity magnetic separation, and gangue fraction is sorted out and obtains mine tailing 2, and
Magnetic iron ore monomer and integral part obtain chats 2 and qualified concentrate containing 2, the coarse grain after classification after magnetic screening choosing
Level part first passes through primary grinding, separates through low intensity magnetic separation the most again, and gangue fraction is sorted out and obtains tail
Ore deposit 1, and magnetic iron ore monomer and integral part obtain chats 1 and qualified concentrate containing 1 after magnetic screening choosing；
(3) chats 1 and chats 2 again return to primary grinding.
Magnetic iron ore ultrafine grinding-classification magnetic selection method the most according to claim 1, it is characterised in that: described
The Control granularity of preliminary election classification is 0.5mm.
Magnetic iron ore ultrafine grinding-classification magnetic selection method the most according to claim 1, it is characterised in that: described
The magnetic field intensity of low intensity magnetic separation is 120～200kA/m.
4. according to the magnetic iron ore ultrafine grinding-classification magnetic selection method one of claims 1 to 3 Suo Shu, it is characterised in that:
The working roll pressure of described high-pressure roller mill be 4～5MPa roller speed be 1.6m/min, roll gap is 25～30mm.
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106694190A (en) * | 2016-11-18 | 2017-05-24 | 吉林吉恩镍业股份有限公司 | Beneficiation method for recycling nickel metal from waste copper nickel ore |
| CN107715965A (en) * | 2017-11-15 | 2018-02-23 | 绵阳环阳科技有限公司 | Efficient roller press grinding system |
| CN107812590A (en) * | 2016-09-14 | 2018-03-20 | 中国地质科学院矿产综合利用研究所 | Selective dissociation strengthening separation method for fine particles difficult to separate |
| CN107899723A (en) * | 2017-12-04 | 2018-04-13 | 成都利君实业股份有限公司 | A kind of slag solid waste high pressure roller grinding magnetic separation process method |
| CN109092566A (en) * | 2018-07-17 | 2018-12-28 | 赤峰山金红岭有色矿业有限责任公司 | A kind of ore dressing more metal isolation technics of layer of inhibition and multistage collecting |
| CN109158206A (en) * | 2018-07-12 | 2019-01-08 | 昆明理工大学 | A kind of classification of multistage, premagnetization are from strengthening magnetic selection method |
| CN109201286A (en) * | 2018-11-19 | 2019-01-15 | 洛阳栾川钼业集团股份有限公司 | A kind of grind grading method improving molybdenum ore treating capacity |
| CN109277193A (en) * | 2018-10-09 | 2019-01-29 | 乔盘池 | A kind of efficient magnetic separation process of mineral |
| CN110102403A (en) * | 2019-05-30 | 2019-08-09 | 中冶北方（大连）工程技术有限公司 | The pre- magnetic separation of coarse grain wet type and closed circuit grinding classification system and technique in HPGR process |
| CN110773315A (en) * | 2019-10-18 | 2020-02-11 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Full-particle-level pre-selection discarding method for magnetite |
| CN111013811A (en) * | 2019-12-23 | 2020-04-17 | 鞍钢集团矿业有限公司 | Thickness separation-gravity-magnetic combined mineral separation process for treating Anshan type iron ore |
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| CN114618634A (en) * | 2022-03-28 | 2022-06-14 | 胡沿东 | Dry grinding and dry separation process for ore |
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| CN107812590A (en) * | 2016-09-14 | 2018-03-20 | 中国地质科学院矿产综合利用研究所 | Selective dissociation strengthening separation method for fine particles difficult to separate |
| CN106694190A (en) * | 2016-11-18 | 2017-05-24 | 吉林吉恩镍业股份有限公司 | Beneficiation method for recycling nickel metal from waste copper nickel ore |
| CN107715965A (en) * | 2017-11-15 | 2018-02-23 | 绵阳环阳科技有限公司 | Efficient roller press grinding system |
| CN107899723A (en) * | 2017-12-04 | 2018-04-13 | 成都利君实业股份有限公司 | A kind of slag solid waste high pressure roller grinding magnetic separation process method |
| CN109158206A (en) * | 2018-07-12 | 2019-01-08 | 昆明理工大学 | A kind of classification of multistage, premagnetization are from strengthening magnetic selection method |
| CN109092566A (en) * | 2018-07-17 | 2018-12-28 | 赤峰山金红岭有色矿业有限责任公司 | A kind of ore dressing more metal isolation technics of layer of inhibition and multistage collecting |
| CN109277193A (en) * | 2018-10-09 | 2019-01-29 | 乔盘池 | A kind of efficient magnetic separation process of mineral |
| CN109201286A (en) * | 2018-11-19 | 2019-01-15 | 洛阳栾川钼业集团股份有限公司 | A kind of grind grading method improving molybdenum ore treating capacity |
| CN110102403A (en) * | 2019-05-30 | 2019-08-09 | 中冶北方（大连）工程技术有限公司 | The pre- magnetic separation of coarse grain wet type and closed circuit grinding classification system and technique in HPGR process |
| CN110773315A (en) * | 2019-10-18 | 2020-02-11 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Full-particle-level pre-selection discarding method for magnetite |
| CN110773315B (en) * | 2019-10-18 | 2021-07-09 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Full-particle-level pre-selection discarding method for magnetite |
| CN111013811A (en) * | 2019-12-23 | 2020-04-17 | 鞍钢集团矿业有限公司 | Thickness separation-gravity-magnetic combined mineral separation process for treating Anshan type iron ore |
| CN114618634A (en) * | 2022-03-28 | 2022-06-14 | 胡沿东 | Dry grinding and dry separation process for ore |
| CN114618634B (en) * | 2022-03-28 | 2023-09-22 | 胡沿东 | Dry grinding and dry separation process of ore |
| CN114602629A (en) * | 2022-04-13 | 2022-06-10 | 赣州金环磁选科技装备股份有限公司 | Efficient method for whole-size-fraction preselection of magnetic ore |
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