CN105983475A - High-pressure roller mill crushing system for magnetite and mineral dressing method of high-pressure roller mill crushing system - Google Patents
High-pressure roller mill crushing system for magnetite and mineral dressing method of high-pressure roller mill crushing system Download PDFInfo
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- CN105983475A CN105983475A CN201610093801.6A CN201610093801A CN105983475A CN 105983475 A CN105983475 A CN 105983475A CN 201610093801 A CN201610093801 A CN 201610093801A CN 105983475 A CN105983475 A CN 105983475A
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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
- 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
- B02C23/10—Separating or sorting of material, associated with crushing or disintegrating with separator arranged in discharge path of crushing or disintegrating zone
- B02C23/12—Separating or sorting of material, associated with crushing or disintegrating with separator arranged in discharge path of crushing or disintegrating zone with return of oversize material to crushing or disintegrating zone
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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
- 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
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- Crushing And Grinding (AREA)
- Disintegrating Or Milling (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention discloses a high-pressure roller mill crushing system for magnetite and a mineral dressing method of the high-pressure roller mill crushing system. The system comprises a gyratory crusher, a vibration screen, a cone crusher, a conveying belt, a high-pressure roller mill, a strong magnetic dry separator, a weak magnetic dry separator and an elevator. The method comprises the steps that magnetite raw ore is firstly fed into the gyratory crusher for coarse crushing, then the magnetite raw ore is fed into the vibration screen to be screened and is fed into the cone crusher for intermediate crushing, then the magnetite raw ore is fed into the high-pressure roller mill for fine crushing, and products finely crushed by the high-pressure roller mill are sequentially fed into the strong magnetic dry separator for strong magnetic separation and fed into the weak magnetic dry separator for weak magnetic separation. According to the high-pressure roller mill crushing system and the mineral dressing method, the tailing discarding quantity of the system is further increased, and therefore the handling capacity of the system is increased; and on the basis of increasing the tailing discarding quantity of the system, the grade of concentrates is increased.
Description
Technical field
The present invention relates to magnetite separation device and method field, specifically a kind of magnetic iron ore high-pressure roller mill pulverizes system
System and beneficiation method thereof.
Background technology
In the ore-dressing technique of conventional magnetic iron ore, as it is shown in figure 1, typically use disintegrating machine and screening to be broken by Ore
Broken, such as three section of one closed circuit technique.The muck entrance ball mill obtained by reduction stage carries out further grinding and dissociates, then to mineral
Carry out magnetic separation to sort.In recent years, the ore crushing technique of high-pressure roller mill (or referred to as roll squeezer, squeezing mill etc.) is developed, to powder
Broken field brings revolutionary breakthrough.High-pressure roller mill has a power savings advantages, and have broken than big, disposal ability is big,
Wear and tear little, use the advantages such as reliable, it is possible to by ore reduction to the granularity less than 3mm, and fine fraction accounts for the overwhelming majority, because of
This so that Ore obtains a certain degree of dissociating.Especially for the magnetic iron ore that magnetic iron ore, especially grade are low, through high pressure
After roller mill is pulverized, magnetic mineral and mine tailing, country rock etc. have obtained preferably dissociating, and are provided with magnetic separation and throw tail and select concentrate
May.
Owing to the Contents of Tailings of low-grade magnetite is high, the throwing tail amount with the Ore magnetic separation of high-pressure roller mill process is big, non-
Often there is advantage.But, generally, when magnetic separation is carried out for the mineral after the pulverizing of high-pressure roller mill, it is all by mineral
Sort into two kinds: a kind of is the concentrate that magnetic mineral content is higher, and another kind is the mine tailing that magnetic mineral content is low.
Due to magnetic mineral continuous distribution in Ore, magnetic separator is difficult to the grade of the of high grade of concentrate and mine tailing
Low.Generally magnetic separator isolated product situation is: when the grade of mine tailing is low, the grade of concentrate is the lowest；Grade when concentrate
Gao Shi, the grade of mine tailing is the highest.Containing more valuable mineral in mine tailing, or it is little to throw tail amount.This most significantly limits
The performance of system effectiveness.
Summary of the invention it is an object of the invention to provide a kind of magnetic iron ore high-pressure roller mill crushing system and ore dressing side thereof
Method, to solve the problem that prior art magnetic mineral ore dressing exists.
In order to achieve the above object, the technical solution adopted in the present invention is:
A kind of magnetic iron ore high-pressure roller mill crushing system, it is characterised in that: include gyratory crusher, vibrosieve, cone crusher
Machine, transmission belt, high-pressure roller mill, strong magnetic dry separator, weak magnetic dry separator, elevator, wherein the discharging opening of gyratory crusher leads to
Cross transmission belt transmission to vibrosieve charging aperture, the oversize outlet of the charging aperture undertaking vibrosieve of described gyratory crusher, transmission
Belt one end accepts the siftage outlet of the discharging opening of gyratory crusher, vibrosieve respectively, and the transmission belt other end leads to high pressure
The charging aperture of roller mill, the discharging opening of high-pressure roller mill is connected with the charging aperture of strong magnetic dry separator by pipeline, strong magnetic dry separator
Mine tailing outlet drain to outside tailing heap, the discharging opening of strong magnetic dry separator is by the charging aperture of pipeline and weak magnetic dry separator even
Connecing, the concentrate outlet of weak magnetic dry separator is connected with outside concentrate collection device, and elevator is led in the chats outlet of weak magnetic dry separator
Lower end, elevator upper end leads to the charging aperture of high-pressure roller mill.
A kind of beneficiation method of magnetic iron ore high-pressure roller mill crushing system, it is characterised in that: comprise the following steps:
(1), by magnetic iron ore tcrude ore send into gyratory crusher coarse crushing, broken after send into bolting, control sieve aperture 25～
75mm, oversize send into broken in gyratory crusher after, carried out carefully by transmission belt feeding high-pressure roller mill together with siftage
Broken；
(2), the product feeding strong magnetic dry separator after in small, broken bits for step (1) mesohigh roller mill is carried out magnetic separator, control magnetic field
Intensity is 96KA/m～240KA/m, obtains the Armco magnetic iron content magnetic mineral first higher than 1% and the Armco magnetic iron content tail less than 2%
Ore deposit second, mine tailing second is by the outside tailing heap of mine tailing outlet drain；
(3), by the magnetic mineral first obtained in step (2) send into weak magnetic dry separator and carry out weak magnetic magnetic separation, control magnetic field intensity little
In 96KA/m, obtain the Armco magnetic iron content relative concentrate third higher than 15%, and the magnetic that Armco magnetic iron content is between 1%～20%
The mineral fourth that iron content is medium；
(4), by elevator, mineral fourth medium for the Armco magnetic iron content obtained in step (3) is back to high-pressure roller mill carry out
Pulverize further so that mineral continue to dissociate, and above-mentioned steps (2), (3), (4) are repeated, until mineral all become mine tailing
Second and relative concentrate third.
The beneficiation method of described a kind of magnetic iron ore high-pressure roller mill crushing system, it is characterised in that: described step (1)
When product after the high-pressure roller mill of middle acquisition is in small, broken bits carries out weak magnetic magnetic separation, control magnetic field intensity less than 96KA/m, obtain magnetic
Iron content higher than 15% relative concentrate penta, and Armco magnetic iron content 1%～15% mineral oneself；
By the mineral of acquisition, oneself carries out magnetic separator, and controlling magnetic field intensity is 96KA/m～240KA/m, obtains Armco magnetic iron content and exists
Mineral heptan and the Armco magnetic iron content mine tailing less than 2% between 1%～20% are pungent, and mine tailing is pungent is emitted into tailing heap；
Heptan the mineral of acquisition are back to high-pressure roller mill pulverize further so that mineral continue to dissociate, and are repeated
State process, rapid until mineral all become the pungent and relative concentrate penta of mine tailing.
The beneficiation method of described a kind of magnetic iron ore high-pressure roller mill crushing system, it is characterised in that: described step (1)
Product after mesohigh roller mill is in small, broken bits carries out breaing up or classification, then carries out magnetic separation, and mineral are divided into magnetic mineral
Relative concentrate that mine tailing that content is low, magnetic mineral content are high and the medium midseam of magnetic mineral content, and by above-mentioned
Midseam returns high-pressure roller mill to be continued to pulverize further.
The beneficiation method of described a kind of magnetic iron ore high-pressure roller mill crushing system, it is characterised in that: magnetic separator or
Weak magnetic magnetic separation can be completed jointly by multiple devices, and mineral are divided into the low mine tailing of magnetic mineral content, magnetic mineral content
High relative concentrate and the medium midseam of magnetic mineral content, and above-mentioned midseam is returned high-pressure roller mill continue into
One step is pulverized.
The beneficiation method of described a kind of magnetic iron ore high-pressure roller mill crushing system, it is characterised in that: magnetic separator and
Weak magnetic magnetic separation can be completed by an equipment with magnetic separator and weak magnetic magnetic separation function, and mineral are divided into magnetic mineral contain
Measure the high relative concentrate of low mine tailing, magnetic mineral content and the medium midseam of magnetic mineral content, and by above-mentioned
Between mineral return high-pressure roller mill and continue to pulverize further.
Advantage of the present invention is:
The present invention further increase system throwing tail amount, thus add the treating capacity of system；
The present invention, on the basis of the throwing tail amount increasing system, improves the grade of concentrate, is elected to be in industry at follow-up concentrate mill,
Treating capacity is greatly lowered so that beneficiation cost reduces further；
Due to the fact that to be thrown by a part of mine tailing and remove, a part of concentrate obtains in advance, so the amount of middling recurrence reprocessing
Greatly reducing, system capability is discharged further.
The invention enables many low-grade mines without extraction value to be provided with the value of exploitation, reduce mining and make
The cutoff grade of industry, adds enterprise's ability to ward off risks, makes enterprise obtain good economic benefit.
Accompanying drawing explanation
Fig. 1 is existing Technology flow chart；
Fig. 2 is that high-pressure roller mill of the present invention pulverizes magnetic iron ore products therefrom " after the strongest magnetic, weak magnetic two step three separates " technological process
Figure；
Fig. 3 is that high-pressure roller mill of the present invention pulverizes magnetic iron ore products therefrom " first after weak magnetic, strong magnetic two step three separates " technological process
Figure；
Fig. 4 is that high-pressure roller mill of the present invention pulverizes magnetic iron ore products therefrom " two step three separation after breaing up " process chart；
Fig. 5 is that high-pressure roller mill of the present invention pulverizes magnetic iron ore products therefrom " unit magnetic separation three separates " process chart；
Fig. 6 is the device connection diagram of present invention typical process flow the most.
Detailed description of the invention
As shown in Figure 6, a kind of magnetic iron ore high-pressure roller mill crushing system, including gyratory crusher 1, vibrosieve 2, circular cone
Disintegrating machine 3, transmission belt 4, high-pressure roller mill 5, strong magnetic dry separator 6, weak magnetic dry separator 7, elevator 8, wherein gyratory crusher 1
Discharging opening by transmission belt transmission to vibrosieve 2 charging aperture, the charging aperture of gyratory crusher 3 accepts the oversize of vibrosieve 2
Outlet, transmission belt 4 one end accepts the discharging opening of gyratory crusher 3 respectively, the siftage of vibrosieve 2 exports, and transmission belt 4 is another
Lead to the charging aperture of high-pressure roller mill 5 in one end, and the discharging opening of high-pressure roller mill 5 is by the charging aperture of pipeline with strong magnetic dry separator 6
Connecting, the mine tailing outlet drain of strong magnetic dry separator 6 to outside tailing heap, the discharging opening of strong magnetic dry separator 6 is by pipeline and weak magnetic
The charging aperture of dry-dressing machine 7 connects, and the concentrate outlet of weak magnetic dry separator 7 is connected with outside concentrate collection device, weak magnetic dry separator 7
Elevator 8 lower end is led in chats outlet, and elevator 8 upper end leads to the charging aperture of high-pressure roller mill 5.
As in figure 2 it is shown, the beneficiation method of a kind of magnetic iron ore high-pressure roller mill crushing system, comprise the following steps:
(1), by magnetic iron ore tcrude ore send into gyratory crusher coarse crushing, broken after send into bolting, control sieve aperture 25～
75mm, oversize send into broken in gyratory crusher after, carried out carefully by transmission belt feeding high-pressure roller mill together with siftage
Broken；
(2), the product feeding strong magnetic dry separator after in small, broken bits for step (1) mesohigh roller mill is carried out magnetic separator, control magnetic field
Intensity is 96KA/m～240KA/m, obtains the Armco magnetic iron content magnetic mineral first higher than 1% and the Armco magnetic iron content tail less than 2%
Ore deposit second, mine tailing second is by the outside tailing heap of mine tailing outlet drain；
(3), by the magnetic mineral first obtained in step (2) send into weak magnetic dry separator and carry out weak magnetic magnetic separation, control magnetic field intensity little
In 96KA/m, obtain the Armco magnetic iron content relative concentrate third higher than 15%, and the magnetic that Armco magnetic iron content is between 1%～20%
The mineral fourth that iron content is medium；
(4), by elevator, mineral fourth medium for the Armco magnetic iron content obtained in step (3) is back to high-pressure roller mill carry out
Pulverize further so that mineral continue to dissociate, and above-mentioned steps (2), (3), (4) are repeated, until mineral all become mine tailing
Second and relative concentrate third.
During as it is shown on figure 3, the product after the high-pressure roller mill of acquisition is in small, broken bits in step (1) carries out weak magnetic magnetic separation, control magnetic
Field intensity is less than 96KA/m, obtains the Armco magnetic iron content relative concentrate penta higher than 15%, and Armco magnetic iron content is in the ore deposit of 1%～15%
Thing is own；
By the mineral of acquisition, oneself carries out magnetic separator, and controlling magnetic field intensity is 96KA/m～240KA/m, obtains Armco magnetic iron content and exists
Mineral heptan and the Armco magnetic iron content mine tailing less than 2% between 1%～20% are pungent, and mine tailing is pungent is emitted into tailing heap；
Heptan the mineral of acquisition are back to high-pressure roller mill pulverize further so that mineral continue to dissociate, and are repeated
State process, rapid until mineral all become the pungent and relative concentrate penta of mine tailing.
As shown in Figure 4, the product after step (1) mesohigh roller mill is in small, broken bits carries out breaing up or classification, then carries out
Magnetic separation, and mineral are divided into the high relative concentrate of the low mine tailing of magnetic mineral content, magnetic mineral content and magnetic mineral contains
Measure medium midseam, and above-mentioned midseam is returned high-pressure roller mill continuation pulverizing further.
Magnetic separator or weak magnetic magnetic separation can be completed jointly by multiple devices, and it is low that mineral are divided into magnetic mineral content
Relative concentrate that mine tailing, magnetic mineral content are high and the medium midseam of magnetic mineral content, and above-mentioned midseam is returned
Return high-pressure roller mill to continue to pulverize further.
As it is shown in figure 5, magnetic separator and weak magnetic magnetic separation can be had setting of magnetic separator and weak magnetic magnetic separation function by one
Standby complete, and mineral are divided into the high relative concentrate of the low mine tailing of magnetic mineral content, magnetic mineral content and magnetic mineral
The midseam that content is medium, and above-mentioned middle mineral are returned high-pressure roller mill continuation pulverizing further.
Specific embodiment:
Embodiment 1: the raw ore that somewhere, Chengde magnetic iron ore grade is 24% is sent into disintegrating machine coarse crushing, sends into vibration after crushing
Sieve screening, controls sieve aperture 25mm, oversize send into broken in disintegrating machine after, send into high-pressure roller mill together with siftage and carry out carefully
Broken；High-pressure roller mill product after in small, broken bits carries out magnetic separator, and control magnetic field intensity is 96KA/m, obtain magnetic mineral first and
Mine tailing second；Magnetic mineral first carries out weak magnetic magnetic separation again, and control magnetic field intensity is 48KA/m, obtains high relative of Armco magnetic iron content
Concentrate third (Armco magnetic iron content 18%) and the medium mineral fourth of Armco magnetic iron content (Armco magnetic iron content 12%)；Then Armco magnetic iron is contained
Measure medium mineral fourth return high-pressure roller mill to pulverize further so that mineral continue to dissociate, and above-mentioned step is repeated
Rapid until mineral all become grade be 7.56% mine tailing second be 42.93% relative concentrate third with grade.
Embodiment 2: somewhere magnetic iron ore raw ore is sent into disintegrating machine coarse crushing, sends into bolting, controls sieve aperture after crushing
50mm, oversize send into broken in disintegrating machine after, send into high-pressure roller mill together with siftage and carry out in small, broken bits；The high pressure roller that will obtain
Product after grinding machine is in small, broken bits carries out weak magnetic magnetic separation, controls magnetic field intensity 48KA/m, obtains the relative concentrate penta that Armco magnetic iron content is high
The mineral relatively low with Armco magnetic iron content are own；By the mineral of acquisition, oneself carries out magnetic separator again, and control magnetic field intensity is 120KA/m,
Obtain Armco magnetic iron content medium mineral heptan and mine tailing is pungent；Then the Armco magnetic iron content that obtains medium mineral return high pressure roller heptan
Grinding machine is pulverized further so that mineral continue to dissociate, and above-mentioned steps is repeated until mineral all become grade is
The mine tailing of 6.47% is pungent is 44.53% relative concentrate penta with grade.
Embodiment 3: by embodiment 1, the product after high-pressure roller mill is in small, broken bits carries out breaing up or classification, then carries out magnetic
Choosing, and mineral are divided into the high relative concentrate of the low mine tailing of magnetic mineral content, magnetic mineral content and magnetic mineral content
Medium midseam, and above-mentioned midseam is returned high-pressure roller mill continuation pulverizing further, finally by whole for all mineral
Become mine tailing and relative concentrate.
Embodiment 4: by embodiment 1, the product after high-pressure roller mill is in small, broken bits passes through the magnetic separator of three separate types,
By controlling the magnetic field intensity of drums for magnetic separation machine, obtain relative concentrate, chats and mine tailing, then middling recurrence is entered high pressure roller mill
Whole mineral the most repeatedly, are finally become mine tailing and relative concentrate by machine.
Claims (6)
1. a magnetic iron ore high-pressure roller mill crushing system, it is characterised in that: include that gyratory crusher, vibrosieve, circular cone are broken
Broken machine, transmission belt, high-pressure roller mill, strong magnetic dry separator, weak magnetic dry separator, elevator, the wherein discharging opening of gyratory crusher
By transmission belt transmission to vibrosieve charging aperture, the charging aperture of described gyratory crusher accepts the oversize outlet of vibrosieve, passes
Defeated belt one end accepts the siftage outlet of the discharging opening of gyratory crusher, vibrosieve respectively, and the transmission belt other end leads to height
The charging aperture of pressure roller grinding machine, the discharging opening of high-pressure roller mill is connected with the charging aperture of strong magnetic dry separator by pipeline, strong magnetic dry separation
The mine tailing outlet drain of machine is connected to outside tailing heap, the discharging opening of strong magnetic dry separator by the charging aperture of pipeline with weak magnetic dry separator
Connecing, the concentrate outlet of weak magnetic dry separator is connected with outside concentrate collection device, and elevator is led in the chats outlet of weak magnetic dry separator
Lower end, elevator upper end leads to the charging aperture of high-pressure roller mill.
2. the magnetic iron ore beneficiation method of high-pressure roller mill crushing system, it is characterised in that: comprise the following steps:
(1), by magnetic iron ore tcrude ore send into gyratory crusher coarse crushing, broken after send into bolting, control sieve aperture 25～
75mm, oversize send into broken in gyratory crusher after, carried out carefully by transmission belt feeding high-pressure roller mill together with siftage
Broken；
(2), the product feeding strong magnetic dry separator after in small, broken bits for step (1) mesohigh roller mill is carried out magnetic separator, control magnetic field
Intensity is 96KA/m～240KA/m, obtains the Armco magnetic iron content magnetic mineral first higher than 1% and the Armco magnetic iron content tail less than 2%
Ore deposit second, mine tailing second is by the outside tailing heap of mine tailing outlet drain；
(3), by the magnetic mineral first obtained in step (2) send into weak magnetic dry separator and carry out weak magnetic magnetic separation, control magnetic field intensity little
In 96KA/m, obtain the Armco magnetic iron content relative concentrate third higher than 15%, and the magnetic that Armco magnetic iron content is between 1%～20%
The mineral fourth that iron content is medium；
(4), by elevator, mineral fourth medium for the Armco magnetic iron content obtained in step (3) is back to high-pressure roller mill carry out
Pulverize further so that mineral continue to dissociate, and above-mentioned steps (2), (3), (4) are repeated, until mineral all become mine tailing
Second and relative concentrate third.
The beneficiation method of a kind of magnetic iron ore high-pressure roller mill crushing system the most according to claim 2, it is characterised in that:
When product after the high-pressure roller mill of acquisition is in small, broken bits in described step (1) carries out weak magnetic magnetic separation, control magnetic field intensity less than 96KA/
M, obtain Armco magnetic iron content higher than 15% relative concentrate penta, and Armco magnetic iron content 1%～15% mineral oneself；
By the mineral of acquisition, oneself carries out magnetic separator, and controlling magnetic field intensity is 96KA/m～240KA/m, obtains Armco magnetic iron content and exists
Mineral heptan and the Armco magnetic iron content mine tailing less than 2% between 1%～20% are pungent, and mine tailing is pungent is emitted into tailing heap；
Heptan the mineral of acquisition are back to high-pressure roller mill pulverize further so that mineral continue to dissociate, and are repeated
State process, until mineral all become the pungent and relative concentrate penta of mine tailing.
The beneficiation method of a kind of magnetic iron ore high-pressure roller mill crushing system the most according to claim 2, it is characterised in that:
Product after described step (1) mesohigh roller mill is in small, broken bits carries out breaing up or classification, then carries out magnetic separation, and mineral are divided into magnetic
Property the high relative concentrate of the low mine tailing of mineral content, magnetic mineral content and the medium midseam of magnetic mineral content, and will
Above-mentioned midseam returns high-pressure roller mill to be continued to pulverize further.
The beneficiation method of a kind of magnetic iron ore high-pressure roller mill crushing system the most according to claim 2, it is characterised in that:
Magnetic separator or weak magnetic magnetic separation can be completed jointly by multiple devices, and mineral are divided into the low mine tailing of magnetic mineral content, magnetic
Property the high relative concentrate of mineral content and the medium midseam of magnetic mineral content, and above-mentioned midseam is returned high pressure roller
Grinding machine continues to pulverize further.
The beneficiation method of a kind of magnetic iron ore high-pressure roller mill crushing system the most according to claim 2, it is characterised in that:
Magnetic separator and weak magnetic magnetic separation can be completed by an equipment with magnetic separator and weak magnetic magnetic separation function, and are divided into by mineral
Relative concentrate that mine tailing that magnetic mineral content is low, magnetic mineral content are high and the medium midseam of magnetic mineral content, and
Above-mentioned middle mineral return high-pressure roller mill continue to pulverize further.
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Cited By (10)
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| 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 |
| CN107744881A (en) * | 2017-11-13 | 2018-03-02 | 承德天宝矿业集团有限公司 | Ore-sorting system and method for Ultra-low-grade magnetite |
| 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 |
| CN108187895A (en) * | 2017-12-25 | 2018-06-22 | 大峘集团有限公司 | The process and device of a kind of dry method ore grinding selection by winnowing magnetic separation for 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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| CN115090397A (en) * | 2022-07-06 | 2022-09-23 | 沈阳盛世五寰科技有限公司 | Dry-type magnetite preselecting system and method |
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Application publication date: 20161005 |