CN107999271A - A kind of method from APT Tungsten smeltings slag for comprehensive recycling useful metal - Google Patents
A kind of method from APT Tungsten smeltings slag for comprehensive recycling useful metal Download PDFInfo
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- CN107999271A CN107999271A CN201711147174.0A CN201711147174A CN107999271A CN 107999271 A CN107999271 A CN 107999271A CN 201711147174 A CN201711147174 A CN 201711147174A CN 107999271 A CN107999271 A CN 107999271A
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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
- B03B9/04—General arrangement of separating plant, e.g. flow sheets specially adapted for furnace residues, smeltings, or foundry slags
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
- C22B7/006—Wet processes
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
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Abstract
The invention belongs to ore dressing and the metal recovery technology in hydrometallurgy field, and in particular to a kind of method that the metallic elements such as tungsten, tin, iron, scandium, niobium are recycled in slag from Tungsten smelting.Concrete technology flow process is：(1) screening mixing is carried out to Tungsten smelting slag；(2) using high gradient magnetic separator magnetic separation process recycling iron, iron ore concentrate is obtained；(3) rotating-vibrating disk ore separators recycling cassiterite is utilized；(4) using centrifugal ore separator recycling tungsten；(5) to three kinds of centrifugation mining tailing scandium, tantalum niobium rare metals, " medium temperature and medium pressure hydrochloric acid leaching extraction washing back extraction " technique is taken in the recycling of scandium, purifying technique again after the recycling of tantalum niobium is leached using hydrofluoric acid.Recycle the process of iron, manganese, tungsten, tin, scandium, tantalum niobium from Tungsten smelting slag the present invention provides a whole set of, leading in selecting smelting combination technology, technique is applied widely, and cost of investment is low, it is easy to accomplish industrial applications.
Description
Technical field
The invention belongs to ore dressing and the metal recovery technology in hydrometallurgy field, and in particular to one kind is returned from Tungsten smelting slag
The method for receiving the metallic elements such as tungsten, tin, iron, scandium, niobium.
Background technology
APT Tungsten smelting slags are that Tungsten smelting enterprise produces the dangerous waste slag produced after APT, after tungsten concentrate is leached by high-alkali technique
Produce, contain substantial amounts of useful metal, including tungsten, tin, iron, scandium, tantalum niobium etc. in metallurgical slag, there is very strong economic value, be
Rare secondary resource.At present, numerous studies have been carried out to the processing of Tungsten smelting slag, many scholars and researcher,
Rare metal scandium such as is extracted using beneficiation method recycling tungsten tin or by metallurgical method, passes through roasting pretreatment-soda acid in recent years
The technique of the process integrations such as leaching-extraction extraction tantalum niobium also has correlative study, all achieves great progress on the whole.But only
Carrying out recycling useful metal only with single technique has certain limitation, and low there are the rate of recovery, loss is big, of high cost and to ring
The problems such as border has a great influence.The present invention use recovery method choosing-smelting process integration, it is environmentally protective, can effectively recycle tungsten, tin, iron,
The metals such as scandium, niobium.
The content of the invention
A kind of method from APT Tungsten smeltings slag for comprehensive recycling useful metal, mainly including following technical step：
(1) screening and sample mixing：Add water to be made into the ore pulp of mass fraction 10%-15% concentration Tungsten smelting slag, add scattered
Agent YF-1 is stirred 30-60 minutes, is then classified with high frequency vibrating fine screen (0.074mm), on-the-sieve material is agglomerating due to bonding
Do not disperse, stirring operation can be returned it to and be again stirring for, undersize material carries out step (2) processing；
(2) iron is received in magnetic separation：The undersize material obtained with sample mixing will be sieved through step (1), with mass concentration 10%-15%'s
Ore pulp form is sent into high gradient magnetic separator recycling Armco magnetic iron mineral, and magnetic concentrate (iron ore concentrate) and tail are obtained by magnetic concentration working twice
Mineral products；
(3) rotating vibrating type Disk Concentrator receives cassiterite：By magnetic tailing product in step (2) with mass concentration 10%-15%
Ore pulp form be sent into rotating vibrating type Disk Concentrator recycling cassiterite, by one roughing, primary cleaning operation, output cassiterite essence
Two ore deposit, cassiterite tailing products；
(4) centrifugal ore separator recycling tungsten：The cassiterite tailing that step (3) is produced is with the ore pulp of mass concentration 10%-15%
Form is uniformly sent into centrifugal ore separator, by one roughing, selected twice, once purging selection operation, output tungsten concentrate and centrifugation tail
Ore deposit；
(5) centrifuge tailing and receive scandium, tantalum niobium：Hydrochloric acid and centrifugation tailing, wherein liquid solid masses are added in autoclave
Than for 4：1-5：1st, 60-80 DEG C of reaction temperature, pressure 0.4-1MPa, stirring reaction time 5h-12h, leaching agent YZ-1 dosages are
The 10% of gross weight (solid+liquid), carries out separation of solid and liquid using vacuum filter by ore pulp, the leachate of scandium is obtained, to leaching
Go out liquid to be purified using extraction process, back extraction operation is carried out after the impurity washing that then will be extracted in organic phase, finally by
Ammonium hydroxide oxalic acid two-step precipitation+roasting method recycling High-purity Sc Oxide；
(6) scandium mining tailing tantalum niobium is received：The slag that will be refined by preceding 5 step, using the tantalum niobium in HF Ore Leaching tailings, combustion
Afterwards further tantalum niobium is purified with extraction.
In step (1), dispersant dosage 300-500g/t, mixing speed 1800-2000r/min, YF-1 are six inclined phosphorus
Sour sodium, sodium pyrophosphate press mass fraction 2：Efficient additive sp-9810, obtained novel dispersant are added after 1 mixing.
In step (2), ore pulp mass concentration is 10-15%, and magnet separator magnetic field intensity is 8000-12000 oersteds.
In step (3), ore pulp mass concentration is 10-15%, rotating vibrating type Disk Concentrator vibration frequency 15-30HZ, card
Rotation period 2-5min.
In step (4), ore pulp mass concentration is 10-20%, rotating speed 650-950r/min, rinses water flow 0-2L/S.
In step (5), YZ-1 presses quality 2 for sodium fluoride and five sodium fluorides：1 proportioning forms.
In step (5), extractant mass fraction be 5-20% P507 (di-2-ethylhexyl phosphonic acid mono-2-ethylhexyl ester)+
Mass fraction is No. 406 solvent naphthas of petrochemical industry of 80-95%, and organic phase and water phase volume ratio (O/A) are 1-5：10.
In step (5), cleaning solution is prepared using hydrochloric acid+hydrogen peroxide, its hydrochloric acid mass fraction is 70-90%, dioxygen water quality
Amount fraction is 10-30%, and organic phase and water phase volume ratio (O/A) are 1-2：1.
In step (5), wash time is 10-60 minutes, washing times 3-5 times.
In step (5), strip liquor use mass fraction for 10%-50% sodium hydroxides+mass fraction be 10%-75% without
Water-ethanol is prepared, the two volume ratio is 5-8：1st, water phase and organic phase volume ratio (A/O) are 1-2：1.
The present invention is same to be had the advantages that：
1st, provide a whole set of and iron, manganese, tungsten, tin, scandium, the process of tantalum niobium are recycled from Tungsten smelting slag, using choosing-smelting
Process integration is technically leading, and ore-dressing technique uses gravity treatment, more friendly to environment.
2nd, the present invention is applied widely, and cost of investment is low, it is easy to accomplish industrial applications.
Brief description of the drawings
Fig. 1：The process flow chart of useful metal is recycled in Tungsten smelting slag.
Embodiment
A kind of method from APT Tungsten smeltings slag for comprehensive recycling useful metal, with reference to embodiment with attached drawing to specific
Recovery process is further described.
Embodiment 1：
Useful metal is recycled from constituent content Tungsten smelting slag sample as shown in Table 1：
Table 1：Sample chemistry multielement analysis/%
1st, sieved by step (1) and sample mixing, ore pulp mass concentration 15%, mixing time 30 minutes, dispersant dosage
For 300g/t, mixing speed 1800r/min, it is sent into high frequency vibrating fine screen (sieve aperture 0.074mm) after having stirred and is classified, on sieve
Product returns to mixing drum, the technique that undersized product carries out step (2).
2nd, the undersize material that step (1) obtains is sent into high gradient magnetic separator in the form of the ore pulp that mass concentration is 15% to return
Armco magnetic iron mineral are received, 8000 oersted of magnetic field intensity, process selected operation twice, gained iron concentrate grade is 47.84%, recycling
Rate 85.34%.
3rd, magnetic tailing product utilization rotating vibrating type Disk Concentrator in step (2) is recycled into cassiterite, ore pulp mass concentration is
Ore pulp, is uniformly sent into rotating vibrating type Disk Concentrator by the 15%th, ore separators vibration frequency 20HZ, card rotation period 4min, is passed through
One roughing, primary cleaning operation, two output cassiterite concentrate, cassiterite tailing products, cassiterite concentrate grade are 35.82%, are returned
Yield 73.12%.
4th, the cassiterite tailing that step (3) produces uniformly is sent into centrifugal ore separator, roughing condition is：Ore pulp mass concentration
15%th, rotating speed 750r/min, flushing water flow 1L/S, selected condition are ore pulp mass concentration 15%, rotating speed 650r/min, rinse
Water flow 1L/S；By one roughing, selected twice, once purging selection operation, output tungsten concentrate and centrifugation tailing, tungsten concentrate grade
For 20.87%, the rate of recovery 72.43%.
5th, scandium is extracted to the centrifugation tailing that step (4) produces, the extraction to scandium uses " medium temperature and medium pressure salt Ore Leaching-extraction "
Technique, after above 4 steps, it be 82.87g/t to centrifuge the grade of scandium in tailing, added in autoclave hydrochloric acid with
Tailing is centrifuged, liquid solid masses ratio is 4：1st, 80 DEG C of reaction temperature, pressure 0.4MPa, stirring reaction time 12h, leaching agent YZ-1
Dosage is the 10% of gross weight (solid+liquid), and the leaching rate of scandium reaches more than 98.13%, and above-mentioned ore pulp is used vacuum mistake
Filter carries out separation of solid and liquid, and scandium content is about 31.73mg/L in leachate.
The leachate of scandium is purified using extraction process, extractant use mass fraction for 7% P507 (2- ethyls
Hexyl phosphonic acids single 2-ethyl hexyl ester)+mass fraction be 93% No. 406 solvent naphthas of petrochemical industry, organic phase and water phase volume ratio (O/
A it is) 4：10, the extraction yield 98.26% of scandium.
Extraction organic phase is washed using hydrochloric acid+hydrogen peroxide, cleaning solution hydrochloric acid mass fraction is 80%, dioxygen water quality
It is 20% to measure fraction；Organic phase is 2 with water phase volume ratio (O/A)：1, washed 60 minutes after fully mixing, organic phase color is by depth
Yellow slowly shoals, and washs 3 times, and organic phase color is changed into faint yellow, and scandium content is 82.87mg/L in organic phase before washing, warp
0.16mg/L containing scandium in cleaning solution is crossed after washing, i.e. eluting rate is 0.19%.
Carry out back extraction operation to the organic phase after washing, strip liquor use mass fraction for 10%-50% sodium hydroxide+
Mass fraction be 10%-75% absolute ethyl alcohol, volume ratio 5：1st, water phase and organic phase volume ratio (A/O) are 1：1, it is stripped water
Scandium content is 198.45mg/L in phase, and back extraction ratio subsequently passes through ammonium hydroxide oxalic acid two-step precipitation+roasting again more than 98.49%
Method recycles High-purity Sc Oxide.
6th, scandium mining tailing tantalum niobium is received
By the tailing Jing Guo preceding 5 step, using the tantalum niobium in HF Ore Leaching tailings, purification by liquid extraction is then further utilized.
Embodiment 2：
Useful metal is recycled from constituent content Tungsten smelting slag sample as shown in Table 2：
Table 2：Sample chemistry multielement analysis/%
1st, sieved by step (1) and sample mixing, ore pulp mass concentration 10%, mixing time 60 minutes, dispersant dosage
For 500g/t, mixing speed 2000r/min, it is sent into high frequency vibrating fine screen (sieve aperture 0.074mm) after having stirred and is classified, on sieve
Product returns to mixing drum, the technique that undersized product carries out step (2).
2nd, the undersize material that step (1) obtains is sent into high gradient magnetic separator in the form of the ore pulp that mass concentration is 15% to return
Armco magnetic iron mineral are received, 8000 oersted of magnetic field intensity, process selected operation twice, gained iron concentrate grade is 43.25%, recycling
Rate 82.90%.
3rd, magnetic tailing product utilization rotating vibrating type Disk Concentrator in step (2) is recycled into cassiterite, ore pulp mass concentration is
Ore pulp, is uniformly sent into rotating vibrating type Disk Concentrator by the 10%th, ore separators vibration frequency 25HZ, card rotation period 3min, is passed through
One roughing, primary cleaning operation, two output cassiterite concentrate, cassiterite tailing products, cassiterite concentrate grade are 38.77%, are returned
Yield 75.23%.
4th, the cassiterite tailing that step (3) produces uniformly is sent into centrifugal ore separator, roughing condition is：Ore pulp mass concentration
10%th, rotating speed 850r/min, flushing water flow 1L/S, selected condition are ore pulp mass concentration 10%, rotating speed 650r/min, rinse
Water flow 1L/S；By one roughing, selected twice, once purging selection operation, output tungsten concentrate and centrifugation tailing, tungsten concentrate grade
For 31.54%, the rate of recovery 75.89%.
5th, scandium is extracted to the centrifugation tailing that step (4) produces, the extraction to scandium uses " medium temperature and medium pressure salt Ore Leaching-extraction "
Technique, after above 4 steps, it be 89.35g/t to centrifuge the grade of scandium in tailing, added in autoclave hydrochloric acid with
Tailing is centrifuged, liquid solid masses ratio is 5：1st, 60 DEG C of reaction temperature, pressure 1MPa, stirring reaction time 5h, leaching agent YZ-1 use
Measure as the 10% of gross weight (solid+liquid), the leaching rate of scandium reaches more than 97.37%, and above-mentioned ore pulp is used vacuum filter
Machine carries out separation of solid and liquid, and scandium content is about 36.43mg/L in leachate.
The leachate of scandium is purified using extraction process, extractant use mass fraction for 8% P507 (2- ethyls
Hexyl phosphonic acids single 2-ethyl hexyl ester)+92% No. 406 solvent naphthas of petrochemical industry, organic phase and water phase volume ratio (O/A) are 3：10,
The extraction yield 97.99% of scandium.
Extraction organic phase is washed using hydrochloric acid+hydrogen peroxide, the mass fraction of hydrochloric acid is 70%, hydrogen peroxide 30%；
Organic phase is 1 with water phase volume ratio (O/A)：1, to be washed 60 minutes after fully mixing, organic phase color is slowly shoaled by buff,
Washing 3 times, organic phase color is changed into faint yellow, and scandium content is 84.66mg/L in organic phase before washing, the cleaning solution after washing
In 0.23mg/L containing scandium, i.e., eluting rate be 0.20%.
Carry out back extraction operation to the organic phase after washing, strip liquor use mass fraction for 20% sodium hydroxide+quality
Fraction be 50% absolute ethyl alcohol, volume ratio 4：1st, water phase and organic phase volume ratio (O/A) are 2：1, scandium contains in strip aqueous
Measure as 193.67mg/L, back extraction ratio 98.63%, subsequently pass through ammonium hydroxide oxalic acid two-step precipitation+roasting method again and recycle high pure zirconia
Scandium.
6th, scandium mining tailing tantalum niobium is received
By the tailing Jing Guo preceding 5 step, using the tantalum niobium in HF Ore Leaching tailings, purification by liquid extraction is then further utilized.
Claims (10)
- A kind of 1. method from APT Tungsten smeltings slag for comprehensive recycling useful metal, it is characterised in that recycled according to the following steps：(1) screening and sample mixing：Add water to be made into the ore pulp that mass concentration is 10%-15% Tungsten smelting slag, add dispersant YF-1 Stirring 30-60 minutes, then uses mesh size to be classified for the dusting cover dither of 0.074mm；On-the-sieve material is due to bonding It is agglomerating not disperse, return it to stirring operation and be again stirring for；(2) iron is received in magnetic separation：The material obtained with sample mixing will be sieved through step (1), high gradient magnetic separator is sent into the form of ore pulp and is returned Armco magnetic iron mineral are received, magnetic essence iron ore and product from failing are obtained by magnetic concentration working twice；(3) rotating vibrating type Disk Concentrator receives cassiterite：Magnetic tailing product in step (2) is sent into rotating vibrating type disk in the form of ore pulp Ore separators recycles cassiterite, by one roughing, primary cleaning operation, two output cassiterite concentrate, cassiterite tailing products；(4) centrifugal ore separator recycling tungsten：The cassiterite tailing that step (3) produces uniformly is sent into centrifugal ore separator in the form of ore pulp, By one roughing, selected twice, once purging selection operation, output tungsten concentrate and centrifugation tailing；(5) centrifuge tailing and receive scandium, tantalum niobium：Hydrochloric acid and centrifugation tailing are added in autoclave, wherein liquid solid masses ratio is 4：1-5：1st, 60-80 DEG C of reaction temperature, pressure 0.4-1MPa, stirring reaction time 5h-12h, leaching agent YZ-1, dosage is solid The 10% of body, liquid gross weight, carries out separation of solid and liquid using vacuum filter by ore pulp, the leachate of scandium is obtained, to leachate Purified using extraction process, carry out back extraction operation after the impurity washing that then will be extracted in organic phase, further pass through Ammonium hydroxide oxalic acid two-step precipitation+roasting method recycling High-purity Sc Oxide；(6) scandium mining tailing tantalum niobium is received：The slag that will be refined by preceding 5 step, it is laggard using the tantalum niobium in HF Ore Leaching tailings, combustion One step purifies tantalum niobium with extraction.
- A kind of 2. method from APT Tungsten smeltings slag for comprehensive recycling useful metal according to claim 1, it is characterised in that In step (1), dispersant dosage 300-500g/t, mixing speed 1800-2000r/min, YF-1 are calgon, burnt phosphorus Sour sodium in mass ratio 2：Efficient additive sp-9810, obtained novel dispersant are added after 1 mixing.
- A kind of 3. method from APT Tungsten smeltings slag for comprehensive recycling useful metal according to claim 1, it is characterised in that In step (2), ore pulp mass concentration is 10-15%, and magnet separator magnetic field intensity is 8000-12000 oersteds.
- A kind of 4. method from APT Tungsten smeltings slag for comprehensive recycling useful metal according to claim 1, it is characterised in that In step (3), ore pulp mass concentration is 10-15%, rotating vibrating type Disk Concentrator vibration frequency 15-30HZ, card rotation period 2-5min。
- A kind of 5. method from APT Tungsten smeltings slag for comprehensive recycling useful metal according to claim 1, it is characterised in that In step (4), ore pulp mass concentration is 10-20%, rotating speed 650-950r/min, rinses water flow 0-2L/S.
- A kind of 6. method from APT Tungsten smeltings slag for comprehensive recycling useful metal according to claim 1, it is characterised in that In step (5), YZ-1 presses quality 2 for sodium fluoride and five sodium fluorides：1 proportioning forms.
- A kind of 7. method from APT Tungsten smeltings slag for comprehensive recycling useful metal according to claim 1, it is characterised in that In step (5), extractant is P507, that is, di-2-ethylhexyl phosphonic acid mono-2-ethylhexyl ester+mass fraction of mass fraction 5-20% For No. 406 solvent naphthas of petrochemical industry of 80-95%, organic phase and water phase volume ratio (O/A) are 1-5：10.
- A kind of 8. method from APT Tungsten smeltings slag for comprehensive recycling useful metal according to claim 1, it is characterised in that In step (5), cleaning solution is prepared using hydrochloric acid+hydrogen peroxide, wherein hydrochloric acid mass fraction 70-90%, hydrogen peroxide mass fraction 10- 30%, organic phase and water phase volume ratio (O/A) are 1-2：1.
- A kind of 9. method from APT Tungsten smeltings slag for comprehensive recycling useful metal according to claim 1, it is characterised in that In step (5), wash time is 10-60 minutes, washing times 3-5 times.
- A kind of 10. method from APT Tungsten smeltings slag for comprehensive recycling useful metal according to claim 1, it is characterised in that In step (5), it for 10%-50% sodium hydroxides+mass fraction is that 10%-75% absolute ethyl alcohols are matched somebody with somebody that strip liquor, which uses mass fraction, System, the two volume ratio is 5-8：1st, water phase and organic phase product body ratio (O/A) are 1-2：1.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110484740A (en) * | 2019-09-29 | 2019-11-22 | 株洲市炎陵县华南冶金科技有限公司 | A kind of open hearth used from the method and this method of tungsten tin copper-lead waste residue recycling tantalum niobium |
| CN110694787A (en) * | 2019-10-15 | 2020-01-17 | 四川省地质矿产勘查开发局成都综合岩矿测试中心（国土资源部成都矿产资源监督检测中心） | Effective recovery process for associated niobium and tantalum in rare metal ore |
| CN110735052A (en) * | 2019-10-16 | 2020-01-31 | 清远市恒德环保科技有限公司 | Method for enriching tungsten in low-grade APT slag |
| CN110735050A (en) * | 2019-10-17 | 2020-01-31 | 韶关市诚一金属材料科技有限公司 | Method for enriching tin in low-grade APT slag |
| CN115108569A (en) * | 2022-08-08 | 2022-09-27 | 宜春天卓新材料有限公司 | Method for recovering lithium hydroxide, sodium fluoride and potassium fluoride by using tungsten-tin tailings |
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| CN110484740A (en) * | 2019-09-29 | 2019-11-22 | 株洲市炎陵县华南冶金科技有限公司 | A kind of open hearth used from the method and this method of tungsten tin copper-lead waste residue recycling tantalum niobium |
| CN110484740B (en) * | 2019-09-29 | 2021-04-27 | 株洲市炎陵县华南冶金科技有限公司 | Method for recovering tantalum and niobium from tungsten-tin-copper-lead waste residues and open hearth furnace used by method |
| CN110694787A (en) * | 2019-10-15 | 2020-01-17 | 四川省地质矿产勘查开发局成都综合岩矿测试中心（国土资源部成都矿产资源监督检测中心） | Effective recovery process for associated niobium and tantalum in rare metal ore |
| CN110694787B (en) * | 2019-10-15 | 2021-09-21 | 四川省地质矿产勘查开发局成都综合岩矿测试中心（国土资源部成都矿产资源监督检测中心） | Effective recovery process for associated niobium and tantalum in rare metal ore |
| CN110735052A (en) * | 2019-10-16 | 2020-01-31 | 清远市恒德环保科技有限公司 | Method for enriching tungsten in low-grade APT slag |
| CN110735052B (en) * | 2019-10-16 | 2021-08-24 | 清远市恒德环保科技有限公司 | Method for enriching tungsten in low-grade APT slag |
| CN110735050A (en) * | 2019-10-17 | 2020-01-31 | 韶关市诚一金属材料科技有限公司 | Method for enriching tin in low-grade APT slag |
| CN110735050B (en) * | 2019-10-17 | 2022-02-01 | 广东诚一环保科技有限公司 | Method for enriching tin in low-grade APT slag |
| CN115108569A (en) * | 2022-08-08 | 2022-09-27 | 宜春天卓新材料有限公司 | Method for recovering lithium hydroxide, sodium fluoride and potassium fluoride by using tungsten-tin tailings |
| CN115350811A (en) * | 2022-09-08 | 2022-11-18 | 昆明理工大学 | Magnetic-gravity combined comprehensive recovery method for poor tin tailings |
| CN115350811B (en) * | 2022-09-08 | 2024-04-12 | 昆明理工大学 | Method for comprehensively recovering lean tin tailings by magnetic gravity combination |
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