CN204583468U - Bastnaesite ore-sorting system - Google Patents
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Abstract
The utility model relates to a kind of ore-sorting system, especially a kind of bastnaesite ore-sorting system.The utility model provides a kind of bastnaesite ore-sorting system, comprises chopped-off head magnetic separation system and floatation system, also comprises final stage magnetic separation system, and described chopped-off head magnetic separation system, floatation system are connected cooperation successively with final stage magnetic separation system.The utility model provides a kind of new bastnaesite ore-sorting system, the flow process of the creationary employing of this system " magnetic-floating-magnetic ", be not only applicable to conventional bastnaesite, and be specially adapted to the bastnaesite being in weathered layer, solve existing technique serious to argillization powdered, rare-earth mineral is the problem that the weathered layer bastnaesite rare earth of obvious thickness misproportion dissemination is difficult to reclaim, namely ensure that rare earth grade, in turn ensure that rare earth yield, stop the excess waste of rare earth, cost is low, high efficiency, there is higher economic benefit and social benefit, be worthy of promotion and application.
Description
Technical field
The utility model relates to a kind of ore-sorting system, especially a kind of bastnaesite ore-sorting system.
Background technology
The rare earth occupancy volume of Panxi Area, Sichuan Province occupies the whole nation the second, and the Dechang large syneclise Rare Earth Mine of this area and Mianning maoniuping rare-earth mineral are the most important single bastnaesite type rare earth resources of China.Mianning maoniuping rare-earth mineral is more conventional Rare Earth Mine, find early, study deep, disseminated grain size thick, obtains high-quality rare earth ore concentrate than being easier to by simple ore-dressing technique.And large syneclise Rare Earth Mine main rare-earth mineral in Dechang is bastnaesite, be positioned at weathered layer, serious by surface weathering alteration, sample is generally in earthy, and crystallizable mineral is poor, and part occurs in noncrystalline; Bastnaesite because of slacking cause granularity to attenuate, embedding cloth relation is tending towards complicated, raw ore TREO distributive law in-3+1mm grade be in 17.90% ,-0.037mm grade distributive law up to 23.31%; Bastnaesite is visible in independently granular distribution in ore, also inlays with the parcel such as fluorite, calcite, barite, celestine or phase adhesion as seen; The essential mineral of strontium, barium is strontianite, celestine and barite mineral, wherein barite and celestine are all sulfate minerals, strontium can reach into isomorph with barium, in purely very low with the mineral content of celestine and the appearance of barite composition in ore, major part exists in interim form therebetween; Thus, traditional ore-dressing technique is adopted to be difficult to obtain the rare earth ore concentrate of acceptable quality.
As applicant adopts the large syneclise Rare Earth Mine in ore dressing mode process Dechang of table concentration, but maximum of the rate of recovery of rare earth ore concentrate reaches 52.14% in test, sludge middle rare earth loss late causes more greatly rare earth yield lower, and along with the increase of mog, the productive rate of sludge increases, and sludge middle rare earth loss amount increases.As applicant adopts the conventional ore dressing mode weight-magnetic process integration of process bastnaesite to process the large syneclise Rare Earth Mine in Dechang and Mianning maoniuping rare-earth mineral respectively, mineral processing index is as table 1:
The rare-earth ore ore-dressing index contrast of table 1 different regions
As can be seen from Table 1, the ore-dressing techniques that two areas adopt all are attached most importance to-magnetic process integration, and the rare earth ore concentrate grade in Mianning area is more than 60%, and rare earth yield, also more than 70%, can meet the requirement of production.Although but area, Dechang rare earth ore concentrate grade is suitable with Mianning, the recovery rate in ore-dressing of rare earth is only about 30%, is difficult to meet production requirement.Therefore, area, Dechang rare earth ore because of slacking cause granularity to attenuate, embedding cloth relation is complicated, it is different from common bastnaesite, if adopt same conventional ore-dressing technique to can not get effective recycling by causing a large amount of rare earth resources.
Publication number is the beneficiation method of a kind of bastnaesite of patent of invention of 102500465A, is by classification after raw ore ore grinding, and then magnetic separation obtains high intensity magnetic separation concentrate and tailings; High intensity magnetic separation concentrate at different levels carries out table concentration respectively, obtains table concentrate, shaking table chats and shaking table mine tailing; Merge table concentrate at different levels and shaking table chats, after Wet-type high gradient magnetic separation, obtain magnetic separation fluoro-carbon-cerium ore concentrate and magnetic middling ore; Merge magnetic middling ore and shaking table mine tailing, the more laggard row one roughing of ore grinding, scan for three times, the closed circuit flotation of triple cleaning, middling cycle returns, and obtains flotation fluoro-carbon-cerium ore concentrate and flotation tailing.Magnetic separation fluoro-carbon-cerium ore concentrate and flotation fluoro-carbon-cerium ore concentrate are the total concentrate of rare earth, and rare earth REO grade is greater than 65%, and overall recovery reaches 75-86%.Although this technique is better to the bastnaesite ore dressing effect of routine, it is for the serious bastnaesite weak effect of weathering described in the utility model, and the rate of recovery is too low.Publication number be 1403203 a kind of bastnaesite dressing process of patent of invention, publication number be the disclosed ore dressing modes such as the beneficiation method of the patent of invention Rare Earth Mine of 103962232A, be all unsuitable for the utility model for bastnaesite." rare metal " the 27th volume the 4th phase, in July, 2003 discloses a kind of Bastnasite Separation Process Based on Size Fractions, it is according to rare earth ore grain size characteristic and physics, chemical property, have studied each mineral washability difference between mine particle group, the method that application coarse and fine separation technology and physical upgrading combine with chemical mineral processing reclaims fluorine carbon cerium mischmetal ore deposit.Fluorine carbon cerium mischmetal reselecting method in coarse grain ore cluster reclaims, fluorine carbon cerium mischmetal magnetic selection method in middle grain ore cluster reclaims, fluorine carbon cerium mischmetal method for floating in microfine ore cluster reclaims, although concentrate grade and the rate of recovery of final acquisition are all higher, it can not disposablely reclaim concentrate.Therefore, need badly now and find a kind of ore-dressing technique being suitable for the serious bastnaesite of weathering, enable that the concentrate of this kind of bastnaesite is disposable reaches high-grade and high-recovery, thus meet the requirement of actual production.
Utility model content
Technical problem to be solved in the utility model is to provide a kind of ore-sorting system of bastnaesite, this system is serious mainly for the bastnaesite argillization powdered being in weathered layer, rare-earth mineral is obvious thickness misproportion dissemination phenomenon, and the rare earth caused thus is difficult to the problem reclaimed and the rate of recovery is low.
The utility model solves the bastnaesite ore-sorting system that its technical problem adopts, and comprises chopped-off head magnetic separation system and floatation system, also comprises final stage magnetic separation system, and described chopped-off head magnetic separation system, floatation system are connected cooperation successively with final stage magnetic separation system.
Further, also comprise swash plate thickener, the import of described swash plate thickener is connected with the outlet of chopped-off head magnetic separation system, and the described outlet of swash plate thickener is connected with the import of floatation system.
Be further, the scavenging flotation machine that described floatation system comprises at least two series connection forms multistage floatation system, scavenging flotation machine is provided with import, selected entrance, selected outlet, cleaner tailings outlet, scans entrance, scans mine tailing outlet and scan outlet; The import of first order scavenging flotation machine is connected with chopped-off head magnetic separation system; In adjacent two scavenging flotation machines, the cleaner tailings outlet of rear stage scavenging flotation machine is connected with the selected entrance of previous stage scavenging flotation machine, and the selected outlet of previous stage scavenging flotation machine is connected with the selected entrance of rear stage scavenging flotation machine; The selected outlet of afterbody scavenging flotation machine is connected with final stage magnetic separation system.
Be further, described floatation system is provided with three scavenging flotation machines, the outlet of scanning of first order scavenging flotation machine is connected with the import of first order scavenging flotation machine, the mine tailing outlet of scanning of first order scavenging flotation machine is connected with the entrance of scanning of second level scavenging flotation machine, the outlet of scanning of second level scavenging flotation machine is connected with final stage magnetic separation system, the mine tailing outlet of scanning of second level scavenging flotation machine is connected with the entrance of scanning of third level scavenging flotation machine, and the outlet of scanning of third level scavenging flotation machine is connected with the entrance of scanning of second level scavenging flotation machine.
Be further, also comprise essence and sweep machine, described essence sweeps the machine ore deposit outlet that comprises that essence sweeps mouth, essence scans out mouth and essence is wound up, described essence sweeps mouth and exports with the cleaner tailings of first order scavenging flotation machine and be connected, simultaneously essence sweeps mouth and is also connected with the outlet of scanning of second level scavenging flotation machine, essence wind up ore deposit outlet be connected with the entrance of scanning of second level scavenging flotation machine, essence scans out mouth and is connected with final stage magnetic separation system.
Be further, described final stage magnetic separation system comprises a low stages of magnetic separation machine, low two stages of magnetic separation machines, a high stages of magnetic separation machine and high two stages of magnetic separation machines, the essence that essence sweeps machine scans out mouth and is connected with the entrance of a low stages of magnetic separation machine, the mine tailing outlet of a low stages of magnetic separation machine is connected with the entrance of second segment magnetic separator, the outlet of a low stages of magnetic separation machine is connected with the entrance of a high stages of magnetic separation machine, and the outlet of low two stages of magnetic separation machines is connected with the entrance of a high stages of magnetic separation machine; The high entrance of a stages of magnetic separation machine is connected with the selected outlet of third level scavenging flotation machine, the outlet of a high stages of magnetic separation machine is connected with the entrance of high two stages of magnetic separation machines, the mine tailing outlet of a high stages of magnetic separation machine is connected with the entrance of a low stages of magnetic separation machine, and the mine tailing outlet of high two stages of magnetic separation machines is connected with the entrance of a high stages of magnetic separation machine.
Further, chopped-off head magnetic separation system comprises weak magnetic separator and intensity magnetic separator, and the outlet of described weak magnetic separator is connected with the entrance of intensity magnetic separator.
Further, before chopped-off head magnetic separation system, also ore mill is connected with.
The beneficial effects of the utility model are: the utility model provides a kind of new bastnaesite ore-sorting system, the flow process of the creationary employing of this system " magnetic-floating-magnetic ", be not only applicable to conventional bastnaesite, and be specially adapted to the bastnaesite being in weathered layer, solve existing technique serious to argillization powdered, rare-earth mineral is the problem that the weathered layer bastnaesite rare earth of obvious thickness misproportion dissemination is difficult to reclaim, namely ensure that rare earth grade, in turn ensure that rare earth yield, stop the excess waste of rare earth, cost is low, high efficiency, there is higher economic benefit and social benefit, be worthy of promotion and application.
Accompanying drawing explanation
Fig. 1 is a kind of floatation system structured flowchart of the present utility model;
Fig. 2 is magnetic separation system structured flowchart of the present utility model.
Detailed description of the invention
Below in conjunction with accompanying drawing, the utility model is described in further detail.
In FIG, selected I and scan I for one-level scavenging flotation machine, selected II and scan II for secondary scavenging flotation machine, selected III and to scan III be three grades of scavenging flotation machines.
Shown in seeing figures.1.and.2, the utility model realizes according to following technique:
A, utilize intensity magnetic separator to carry out high intensity magnetic separation: the ore pulp obtained for Grinding procedure, the granularity of ore pulp Minerals was the grade 1.0 ~ 5.0% of 200 mesh sieves 60 ~ 85%, ore pulp Minerals, first carried out high intensity magnetic separation; High intensity magnetic separation gained concentrate grade 3 ~ 10%, high intensity magnetic separation magnetic field intensity 1.0 ~ 1.5T;
B, high intensity magnetic separation concentrate pulp utilize swash plate thickener to be concentrated into mass concentration 30 ~ 50%;
C, concentrated after ore pulp utilize floatation system to carry out flotation: in the magnetic concentrate ore pulp after concentrating, add floating agent and stir, then roughly selecting; Rougher concentration carries out three grades and closed circuitly selectedly obtains flotation concentrate; The selected Tailings Slurry of the first order is swept through one-level essence and is obtained scavenger concentrate; Rougher tailings slurry carries out three grades and scans, and the Tailings Slurry that one-level is scanned enters secondary and scans, and the Tailings Slurry that secondary is scanned enters three grades and scans, and three grades of Tailings Slurries scanned are flotation tailing; The concentrate that one-level is scanned turns back to roughly selects operation, and three grades of concentrate scanned turn back to secondary and scan; The concentrate scanned of secondary is sent into essence and is swept operation, and the Tailings Slurry that essence is swept is sent to secondary and scans operation; The concentrate grade 20 ~ 60% that flotation obtains is flotation concentrate and scavenger concentrate average grade;
D, flotation concentrate carry out high intensity magnetic separation and obtain rare earth ore concentrate: flotation concentrate is sent into the concentrate that a high stages of magnetic separation obtains and directly send into high two stages of magnetic separation, the concentrate of high two stages of magnetic separation is magnetic concentrate, i.e. product rare earth ore concentrate; Scavenger concentrate is sent into the mine tailing that a low stages of magnetic separation obtains and directly send into low two stages of magnetic separation, the mine tailing of low two stages of magnetic separation is final magnetic tailing; The mine tailing of the concentrate of a low stages of magnetic separation, the concentrate of low two stages of magnetic separation and high two stages of magnetic separation together sends into a high stages of magnetic separation; The mine tailing of a high stages of magnetic separation sends into a low stages of magnetic separation; High intensity magnetic separation magnetic field intensity 1.0 ~ 1.5T.
The ore-dressing technique that the utility model uses for bastnaesite ore pulp Minerals granularity be cross 200 mesh sieves 60 ~ 85%, the change of mog for the rate of recovery impact in rare earth ore concentrate significantly, along with the increase of mog, increasing rare-earth mineral is dissociated, the REO rate of recovery of rare earth ore concentrate also rises thereupon, when mog is more than 200 mesh sieve 85%, because granularity is meticulous, sludge content in ore pulp increases, part fine fraction rare-earth mineral is entrained in lead concentrate and loses, and causes the rate of recovery of rare earth ore concentrate to reduce.Thus, it is thick or meticulous to be no matter that mineral particle is spent, and is all unfavorable for the recovery of rare earth ore concentrate, have a strong impact on grade and the rate of recovery of rare earth ore concentrate, in actual production, the mode of Multistage ore-grinding and screening need be adopted to realize mineral granularity within the scope of the utility model, stop overground phenomenon.
Preferably, before the high intensity magnetic separation of step a, also can carry out low intensity magnetic separation, magnetic field intensity 0.4 ~ 0.6T, low intensity magnetic separation mine tailing enters high intensity magnetic separation again.The utility model carries out low intensity magnetic separation, can remove the iron contained in ore pulp, is conducive to improving final rare earth ore concentrate grade further.Further, the preferred 0.5T of low intensity magnetic separation magnetic field intensity.
Preferably, in above-mentioned technique, the magnetic field intensity of high intensity magnetic separation is all 1.2T.
Adopt above-mentioned technique, can not only ensure at actual production middle rare earth concentrate grade 65 ~ 70%, and total rare earth recovery rate can also be made up to 63 ~ 75%, for the ore dressing of weathered layer bastnaesite, achieve unexpected technique effect.
Below by embodiment, the utility model technique is described further, but not therefore by the restriction of the utility model protection domain in one embodiment.
What the utility model embodiment adopted is the large syneclise Rare Earth Mine in Dechang, be in weathered layer, powdered is serious, in obvious thickness misproportion dissemination phenomenon, raw ore TREO distributive law in-3+1mm grade is 17.90%, in-0.037mm grade, distributive law is up to 23.31%, and raw ore chemical analysis structure is as shown in table 2.
Multinomial analysis result/the % of table 2 raw ore chemistry
| Element | TREO | SiO 2 | CaF 2 | Ba | Fe 2O 3 | Al 2O 3 | MgO | CaO | S |
| Content | 2.40 | 28.59 | 14.98 | 3.99 | 3.07 | 9.31 | 1.20 | 16.40 | 1.92 |
| Element | K 2O | MnO | Ti | Pb | SrO | ThO 2 | Zn | - | - |
| Content | 4.48 | 0.23 | 0.31 | 0.20 | 8.36 | 0.0073 | 0.023 | - | - |
Embodiment one adopts method of the present utility model
Carry out fragmentation to raw ore, through the round sieve that shakes of aperture 20mm, oversize returns fragmentation, and then successively through three grades (5mm, 1.5mm and 0.15mm) screening and ore grinding, the mineral particle obtained spends 200 mesh sieve mineral quality marks about 70%.Then weak magnetic separator is sent into, deironing is carried out under the magnetic field intensity of 0.5T, ore pulp after deironing is sent into level Four intensity magnetic separator and is carried out high intensity magnetic separation, magnetic field intensity is all 1.2T, the concentrate grade about 5% that level Four high intensity magnetic separation obtains, and is then concentrated by swash plate thickener, pulp density is concentrated into about 40%, the flotation flowsheet of direct feeding floatation system, flotation adopts flow process as shown in Figure 1 to operate, and floating agent is commercially available conventional dose: collecting agent, foaming agent and adjusting agent; Collecting agent is the H that Zhangjiakou Kai Sheng beneficiation reagent Co., Ltd produces
205, foaming agent is the floatation frother that Zhangjiakou Kai Sheng beneficiation reagent Co., Ltd produces, and adjusting agent is waterglass and NaOH.Obtain flotation concentrate and scavenger concentrate average grade 20-30% after flotation, the magnetic dressing process then sent into as shown in Figure 2 operates, and the magnetic field intensity of magnetic separator is all 1.2T, and finally obtain rare earth ore concentrate, grade 65-68%, the rate of recovery is up to 70%.
Comparative example one only adopts magnetic separation-floatation process
The embodiment of this comparative example is with the forward part of embodiment one, uniquely unlike the magnetic separation process omitting final step, obtain the grade about 35% of rare earth ore concentrate, overall recovery reaches about 80%, if adjustment magnetic separation and floatation process control, as adopted the high price medicament Using Salicyl Hydroximic Acid of more strong selectivity and flotation pulp is heated, the grade of final rare earth ore concentrate is made to reach 50-60%, so overall recovery only reaches 45-50%, and due to medicament and measure of heating, totle drilling cost is increased substantially, the requirement of actual industrial production can not be met.
As can be seen here, adopt the bastnaesite of magnetic separation-floatation process process the utility model weathered layer, industrial requirement can not be met.
Comparative example two only adopts flotation-magnetic separation process
The embodiment of this comparative example is the magnetic separation operation before not adopting flotation, and all the other operations are all with embodiment one, and by obtaining the average grade 15-40% of concentrate after flotation, then magnetic separation obtains the grade 50-65% of rare earth ore concentrate.Because which first adopts flotation, whole raw ore enters flotation circuit, flotation treating capacity is large, the medicament consumed will increase 40-50% than the utility model technique, and the fine granularity ore deposit of weathering, argillization can not form precipitation and run off before entering flotation in concentration process, cause yield far below the utility model technique, overall recovery can only reach 30-40%.
As can be seen here, adopt flotation-magnetic separation process process the utility model weathered layer bastnaesite, industrial requirement can not be met.
Ore dressing effect when comparative example three is overground
Fragmentation is carried out to raw ore, through the round sieve that shakes of aperture 20mm, oversize returns fragmentation, then ore grinding, then sieves with 0.15mm high-frequency screen, oversize returns ore grinding, screenings granularity crosses 200 sieves 95%, sends into the utility model " magnetic-floating-magnetic " technique and carries out ore dressing, finally obtain rare earth ore concentrate, grade about 65%, rate of recovery 50-60%.
As can be seen here, overground phenomenon is also comparatively large on the utility model ore dressing impact, and the magnetic separation yield after meticulous flotation reduces, if cross rough floatation medicament can not float coarse granule ore deposit normally, it is high that tail is lost in flotation, and granularity of concentrate is inadequate, also can cause that impurity content is high, grade declines.
Claims (8)
1. bastnaesite ore-sorting system, comprises chopped-off head magnetic separation system and floatation system, it is characterized in that: also comprise final stage magnetic separation system, and described chopped-off head magnetic separation system, floatation system are connected cooperation successively with final stage magnetic separation system.
2. bastnaesite ore-sorting system as claimed in claim 1, it is characterized in that: also comprise swash plate thickener, the import of described swash plate thickener is connected with the outlet of chopped-off head magnetic separation system, and the described outlet of swash plate thickener is connected with the import of floatation system.
3. bastnaesite ore-sorting system as claimed in claim 1, it is characterized in that: the scavenging flotation machine that described floatation system comprises at least two series connection forms multistage floatation system, scavenging flotation machine is provided with import, selected entrance, selected outlet, cleaner tailings outlet, scans entrance, scans mine tailing outlet and scan outlet; The import of first order scavenging flotation machine is connected with chopped-off head magnetic separation system; In adjacent two scavenging flotation machines, the cleaner tailings outlet of rear stage scavenging flotation machine is connected with the selected entrance of previous stage scavenging flotation machine, and the selected outlet of previous stage scavenging flotation machine is connected with the selected entrance of rear stage scavenging flotation machine; The selected outlet of afterbody scavenging flotation machine is connected with final stage magnetic separation system.
4. bastnaesite ore-sorting system as claimed in claim 3, it is characterized in that: described floatation system is provided with three scavenging flotation machines, the outlet of scanning of first order scavenging flotation machine is connected with the import of first order scavenging flotation machine, the mine tailing outlet of scanning of first order scavenging flotation machine is connected with the entrance of scanning of second level scavenging flotation machine, the outlet of scanning of second level scavenging flotation machine is connected with final stage magnetic separation system, the mine tailing outlet of scanning of second level scavenging flotation machine is connected with the entrance of scanning of third level scavenging flotation machine, the outlet of scanning of third level scavenging flotation machine is connected with the entrance of scanning of second level scavenging flotation machine.
5. bastnaesite ore-sorting system as claimed in claim 4, it is characterized in that: also comprise essence and sweep machine, described essence sweeps the machine ore deposit outlet that comprises that essence sweeps mouth, essence scans out mouth and essence is wound up, described essence sweeps mouth and exports with the cleaner tailings of first order scavenging flotation machine and be connected, simultaneously essence sweeps mouth and is also connected with the outlet of scanning of second level scavenging flotation machine, essence wind up ore deposit outlet be connected with the entrance of scanning of second level scavenging flotation machine, essence scans out mouth and is connected with final stage magnetic separation system.
6. bastnaesite ore-sorting system as claimed in claim 5, it is characterized in that: described final stage magnetic separation system comprises a low stages of magnetic separation machine, low two stages of magnetic separation machines, a high stages of magnetic separation machine and high two stages of magnetic separation machines, the essence that essence sweeps machine scans out mouth and is connected with the entrance of a low stages of magnetic separation machine, the mine tailing outlet of a low stages of magnetic separation machine is connected with the entrance of second segment magnetic separator, the outlet of a low stages of magnetic separation machine is connected with the entrance of a high stages of magnetic separation machine, and the outlet of low two stages of magnetic separation machines is connected with the entrance of a high stages of magnetic separation machine; The high entrance of a stages of magnetic separation machine is connected with the selected outlet of third level scavenging flotation machine, the outlet of a high stages of magnetic separation machine is connected with the entrance of high two stages of magnetic separation machines, the mine tailing outlet of a high stages of magnetic separation machine is connected with the entrance of a low stages of magnetic separation machine, and the mine tailing outlet of high two stages of magnetic separation machines is connected with the entrance of a high stages of magnetic separation machine.
7. bastnaesite ore-sorting system as claimed in claim 1, it is characterized in that: chopped-off head magnetic separation system comprises weak magnetic separator and intensity magnetic separator, the outlet of described weak magnetic separator is connected with the entrance of intensity magnetic separator.
8. the bastnaesite ore-sorting system as described in claim as arbitrary in claim 1 to 7, is characterized in that: before chopped-off head magnetic separation system, be also connected with ore mill.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110813522A (en) * | 2019-11-01 | 2020-02-21 | 四川江铜稀土有限责任公司 | Method for improving quality of flotation rare earth concentrate and mineral separation method of rare earth ore |
| CN111921716A (en) * | 2020-06-15 | 2020-11-13 | 江苏大丰新安德矿业有限公司 | Method for extracting high-grade fine iron powder from rare earth tailings |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110813522A (en) * | 2019-11-01 | 2020-02-21 | 四川江铜稀土有限责任公司 | Method for improving quality of flotation rare earth concentrate and mineral separation method of rare earth ore |
| CN111921716A (en) * | 2020-06-15 | 2020-11-13 | 江苏大丰新安德矿业有限公司 | Method for extracting high-grade fine iron powder from rare earth tailings |
| CN111921716B (en) * | 2020-06-15 | 2022-06-21 | 江苏大丰新安德矿业有限公司 | Method for extracting high-grade fine iron powder from rare earth tailings |
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Address after: Leshan Shenghe Rare Earth Co., Ltd., Jinsu Town, Wutongqiao District, Leshan City, Sichuan Province 614803 Patentee after: Leshan Shenghe Rare Earth Co.,Ltd. Address before: Leshan Shenghe Rare Earth Co., Ltd., Jinsu Town, Wutongqiao District, Leshan City, Sichuan Province 614803 Patentee before: LESHAN SHENGHE RARE EARTH Co.,Ltd. |