CN102352444A - Method for producing compound salts by tantalum metallurgy byproducts - Google Patents
Method for producing compound salts by tantalum metallurgy byproducts Download PDFInfo
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- CN102352444A CN102352444A CN2011101420321A CN201110142032A CN102352444A CN 102352444 A CN102352444 A CN 102352444A CN 2011101420321 A CN2011101420321 A CN 2011101420321A CN 201110142032 A CN201110142032 A CN 201110142032A CN 102352444 A CN102352444 A CN 102352444A
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Abstract
The invention relates to a recovery and reutilization method of fused salt mixed byproducts obtained after tantalum powder preparation by a sodium reducing method, in particular to a method for producing compound salts by tantalum metallurgy byproducts, which is characterized by comprising the following steps that: pure water is added into a dissolving tank, then, the tantalum metallurgy byproducts are added, the stirring is carried out while adding until the tantalum metallurgy byproducts are completely dissolved, the still standing clarification is carried out for 6 to 10 hours, supernatant liquid of the solution is discharged out for precisely filtering, and the solution enters an acidity regulating tank after being filtered; the rest slag-containing solution is stirred to a turbid state, crude filtering is carried out, then, the filter liquid is precisely filtered, and the filtered clear liquid enters the acidity regulating tank; the pH value of the clear liquid is regulated to 7 to 9 in the acidity regulating tank, then, the clear liquid is concentrated through evaporation and is whirled and dried through centrifugation to obtain compound salt crystals, and then, the compound salt crystals are baked. The compound salt product produced by the method has the advantages that each index respectively reaches the use requirement, the compound salt product is suitable for being used for producing diluting agents of K2TaF7 and metallurgy level tantalum powder, so the circulation and the reutilization of the byproducts are realized, the environment is protected, and the production cost is also saved.
Description
Technical field
The present invention relates to the recycling method of gained fused salt mixing by product behind a kind of sodium reduction legal system tantalum powder, especially use the method for the metallurgical by-product production composite salt of tantalum.
Background technology
The metallurgical by product of tantalum is a gained fused salt mixing by product behind the sodium reduction legal system tantalum powder.Outward appearance is generally white porous block, is mingled with light blue and lavender, and corrodibility is strong.Sodium reduction legal system tantalum powder method is a thinner with KF and KCl, adopts sodium Metal 99.5 reduction tantalum potassium fluoride, obtains the tantalum powder, and by product is a molten salt mixture, and main component is KF, NaCl, NaF and KCl, contains recyclable Ta
2O
5About 0.4～0.7%.
Domestic traditional treatment method be by product stack to store a certain amount of after, concentrate water-solublely again, extract the Ta in the filter residue
2O
5, lot of F wherein
-, Cl
-The ion pair environment is harmful, can not discharge arbitrarily.Common treatment process is with compound and its reaction of calcium such as lime, lime carbonate or calcium chloride, makes fluorion be converted into water-fast Calcium Fluoride (Fluorspan), solidifies and reclaims.This procedure is complicated, and needs to drop into a large amount of new raw materials, and cost is high, is unfavorable for the low-cost metallurgical by product of tantalum that reclaims.
Summary of the invention
The purpose of this invention is to provide a kind of method, can low-costly reclaim the metallurgical by product of tantalum and be used to produce the KF/KCl composite salt with the metallurgical by-product production composite salt of tantalum, thereby as producing K
2TaF
7The thinner Ta powder used with metallurgy.
A kind of method with the metallurgical by-product production composite salt of tantalum; Its special feature is; Comprise the steps: in dissolving tank, to add pure water; Add the metallurgical by product of tantalum again; Consumption is the metallurgical by product of tantalum: pure water=1: 2-3, and the limit edged stirs, until dissolving fully; Obtain turbid solution, leave standstill clarification 6～10 hours; The solution supernatant liquid is emitted, carry out secondary filter, filter the back and get into the acid adjustment groove; Remaining slag inclusion solution is stired and make muddy, carried out coarse filtration, filtrating is carried out secondary filter more afterwards, and the clear liquid after the filtration gets into the acid adjustment groove; After in the acid adjustment groove, clear liquid pH value being adjusted to 7～9, again clear liquid evaporation concentration, centrifuge dripping are obtained the composite salt crystal, oven dry gets final product then.
Wherein the metallurgical by product of tantalum is a particulate state, and size is about 10～40mm.
Wherein dissolution process is earlier pure water to be heated to 60～90 ℃, adds the metallurgical byproduct particles of tantalum again.
Wherein secondary filter adopts microfroc filter to carry out, and filtering accuracy reaches≤1 μ m, and anti-F
-, Cl
-Corrosion.
Wherein coarse filtration adopts plate-and-frame filter press or suction filter filter cloth to filter, and filtering accuracy reaches≤200 orders, and anti-F
-, Cl
-Corrosion.
Wherein in the acid adjustment groove, use the hydrofluoric acid of 20-40% weight percent or the hydrochloric acid of 20-35% weight percent, under stirring condition, join in the clear liquid after the secondary filter, regulate pH value to 7～9.
Wherein evaporation concentration is carried out in the condensing crystal device, and crystallization time is 5-48h.
Wherein centrifuge dripping carries out in the condensing crystal device, utilizes whizzer that magma is separated into mother liquor and the mixing salt crystal that contains less water, requires mixing salt crystal water content≤10%.
Wherein oven dry is with fluidized-bed or resistance-type heating converter, and under 120-350 ℃ of condition, oven dry composite salt crystal requires crystal product water content≤0.05%.
The composite salt product that the present invention produced, each index all reaches service requirements, is applicable to produce K
2TaF
7The thinner Ta powder used with metallurgy, thus realized the cycling and reutilization of by product, and both production cost had also been practiced thrift in environmental protection.
Embodiment
Technology of the present invention is broken material-dissolving-filtration-acid adjustment-evaporation concentration-centrifuge dripping-oven dry.
(1) fragmentation: (size is about 300～500mm) the metallurgical by product of tantalum, and (particle size is about 10～40mm) to be broken for small-particle with bulk to use crusher.
(2) dissolving: in dissolving tank, add pure water, and be heated to 60～90 ℃, slowly add the byproduct particles of metering in proportion again, stirred 6～10 hours, be dissolved in fully in the hot water, form turbid solution until particle.
(3) secondary filter: with dissolving tank at the middle and upper levels clear liquid squeeze into microfroc filter, purpose is to remove insolubles and other impurity in the clear liquid, prevents to influence the crystalline product quality.Require the filter filtering accuracy to want≤1 μ m, anti-F
-, Cl
-Corrosive power is strong.
(4) coarse filtration: lower floor's slag inclusion solution in the dissolving tank is squeezed into coarse filtration equipment, the filtering waste residue that contains NaF, tantalum in a large number wherein.Therefore filtrating also will get into microfroc filter once more and filter because of containing a small amount of small insolubles.Coarse filtration equipment can be plate-and-frame filter press or suction filter filter cloth, requires filtering accuracy to want≤100 orders, anti-F
-, Cl
-Corrosive power is strong.
(5) acid adjustment: in the acid adjustment groove, use hydrofluoric acid (weight percent concentration 20-40%) or hydrochloric acid (weight percent concentration 20-35%) under agitation condition, regulate filtrating pH value to 7.0～9.0.
(6) evaporation concentration: the purpose of evaporation concentration is the moisture content of removing in the solution; Separate out the composite salt crystal,, must adopt heating under vacuum to dewater in order to remove excessive moisture fast; Require solution temperature to reach 70-80 ℃, in the vacuum concentration pan vacuum tightness reach-0.06～-0.08Mpa.In the concentration process, necessary per 4 hours continuous liquid once stops heating after continuous concentration 5-48 hour, destroy vacuum.All used solution must be the solution of removing insolubles through secondary filter in this process.
(7) after evaporation concentration, open earlier whizzer, and open the vaporizer lower valve and put concentrated solution, begin to filter, whizzer runs up, and the composite salt after the filtration is discharged from the whizzer discharge port automatically, gets in the drying plant to dry.
(8) oven dry: oven dry crystal by adopting fluidized-bed or resistance-type heating converter, working temperature is set to 120-350 ℃.Drying plant requires internal temperature even, is not stained with material.Oven dry requires composite salt product water content≤0.05% after accomplishing.
Embodiment 1
Open crusher, the metallurgical by product of bulk tantalum is dropped into crusher, be crushed to 10～40mm sized particles.In dissolving tank, add the 1000L pure water, open heating, be heated to 85 ℃, open the stirring rake and the ventilation of dissolving tank again, slowly add byproduct particles 500kg, stirring rake is closed in dissolving fully after 8 hours, leaves standstill clarification 9 hours; Open dissolving tank centre exit valve, supernatant liquid is put into microfroc filter (filtering accuracy is less than 1um) filter, filtrating is filtered in the acid adjustment groove.After dissolving tank lower floor slag inclusion solution is stired and make muddy, emitted by dissolving tank lower part outlet valve, get into plate-and-frame filter press (filtering accuracy is less than 50um) and filter, filtrating gets into the microfroc filter filtration more then, gets into the acid adjustment groove again, and filter residue is directly discharged, packed.In the acid adjustment groove, open stirring rake, slowly add hydrofluoric acid (weight percent concentration is 20%) 20L, regulator solution pH value=8.2.Solution is squeezed in the condensing crystal device, opened heating, stirring and vacuum pump, vacuum tightness is-0.8MPa that Heating temperature is set at 150 ℃.After 48 hours, the proportion of saturated solution is 1.25g/cm
3, stop heating, destroy vacuum, magma is entered whizzer, behind the centrifuge dripping, obtain drying crystal and mother liquor.Mother liquor returns the condensing crystal device.Dry crystal and get into resistance-type heating converter drying, temperature is set at 350 ℃, dries to obtain the composite salt product in 2 hours, meets index, sees shown in the table 1.
Embodiment 2
Open crusher, the metallurgical by product of bulk tantalum is dropped into crusher, be crushed to 10～40mm sized particles.In dissolving tank, add the 1100L pure water, open heating, be heated to 65 ℃, open the stirring rake and the ventilation of dissolving tank again, slowly add byproduct particles 550kg, stirring rake is closed in dissolving fully after 6 hours, leaves standstill clarification 8 hours; Open dissolving tank centre exit valve, supernatant liquid is put into microfroc filter filter (filtering accuracy is less than 1um), filtrating is filtered in the acid adjustment groove.After dissolving tank lower floor slag inclusion solution is stired and make muddy, emitted by dissolving tank lower part outlet valve, get into plate-and-frame filter press and filter (filtering accuracy is less than 50um), filtrating gets into microfroc filter and filters, and gets into the acid adjustment groove again, and filter residue is directly discharged, packed.In the acid adjustment groove, open stirring rake, slowly add hydrofluoric acid (weight percent concentration is 20%) 22L, regulator solution pH value=7.1.Solution is squeezed in the condensing crystal device, opened oily heating, stirring and vacuum pump, vacuum tightness is-0.78MPa that Heating temperature is set at 140 ℃.After 36 hours, the proportion of saturated solution is 1.24g/cm
3, stop heating, destroy vacuum, magma is entered whizzer, behind the centrifuge dripping, obtain drying crystal and mother liquor.Mother liquor returns the condensing crystal device.Dry crystal and get into resistance-type heating converter drying, temperature is set at 300 ℃, dries to obtain the composite salt product in 2 hours, specifically sees table 1.
Embodiment 3
Open crusher, the metallurgical by product of bulk tantalum is dropped into crusher, be crushed to 10～40mm sized particles.In dissolving tank, add the 1080L pure water, open heating, be heated to 70 ℃, open the stirring rake and the ventilation of dissolving tank again, slowly add byproduct particles 540kg, stirring rake is closed in dissolving fully after 5.5 hours, leaves standstill clarification 7 hours; Open dissolving tank centre exit valve, supernatant liquid is put into microfroc filter filter (filtering accuracy is less than 1um), filtrating is filtered in the acid adjustment groove.After dissolving tank lower floor slag inclusion solution is stired and make muddy, emitted by dissolving tank lower part outlet valve, get into plate-and-frame filter press (filtering accuracy is less than 50um), filtrating gets into microfroc filter and filters, and gets into the acid adjustment groove again, and filter residue is directly discharged, packed.In the acid adjustment groove, open stirring rake, slowly add hydrofluoric acid (weight percent concentration is 20%) 21L, regulator solution pH value=7.5.Solution is squeezed in the condensing crystal device, opened oily heating, stirring and vacuum pump, vacuum tightness is-0.78MPa that Heating temperature is set at 140 ℃.After 38 hours, the proportion of saturated solution is 1.24g/cm
3, stop heating, destroy vacuum, magma is entered whizzer, behind the centrifuge dripping, obtain drying crystal and mother liquor.Mother liquor returns the condensing crystal device.Dry crystal and get into resistance-type heating converter drying, temperature is set at 310 ℃, dries to obtain the composite salt product in 2 hours, specifically sees table 1.
Embodiment 4
Open crusher, the metallurgical by product of bulk tantalum is dropped into crusher, be crushed to 10～40mm sized particles.In dissolving tank, add the 900L pure water, open heating, be heated to 75 ℃, open the stirring rake and the ventilation of dissolving tank again, slowly add byproduct particles 450kg, stirring rake is closed in dissolving fully after 7.5 hours, leaves standstill clarification 9 hours; Open dissolving tank centre exit valve, supernatant liquid is put into microfroc filter filter (filtering accuracy is less than 1um), filtrating is filtered in the acid adjustment groove.After dissolving tank lower floor slag inclusion solution is stired and make muddy, emitted by dissolving tank lower part outlet valve, get into plate-and-frame filter press (filtering accuracy is less than 50um), filtrating gets into microfroc filter and filters, and gets into the acid adjustment groove again, and filter residue is directly discharged, packed.In the acid adjustment groove, open stirring rake, slowly add hydrochloric acid (weight percent concentration is 30%) 20L, regulator solution pH value=7.5.Solution is squeezed in the condensing crystal device, opened oily heating, stirring and vacuum pump, vacuum tightness is-0.75MPa that Heating temperature is set at 130 ℃.After 20 hours, the proportion of saturated solution is 1.24g/cm
3, stop heating, destroy vacuum, magma is entered whizzer, behind the centrifuge dripping, obtain drying crystal and mother liquor.Mother liquor returns the condensing crystal device.Dry crystal and get into the fluidized-bed oven dry, temperature is set at 280 ℃, obtains the composite salt product after the oven dry.See shown in the table 1.
Embodiment 5
Open crusher, the metallurgical by product of bulk tantalum is dropped into crusher, be crushed to 10～40mm sized particles.In dissolving tank, add the 1200L pure water, open heating, be heated to 87 ℃, open the stirring rake and the ventilation of dissolving tank again, slowly add byproduct particles 600kg, stirring rake is closed in dissolving fully after 9 hours, leaves standstill clarification 10 hours; Open dissolving tank centre exit valve, supernatant liquid is put into microfroc filter filter (filtering accuracy is less than 1um), filtrating is filtered in the acid adjustment groove.After dissolving tank lower floor slag inclusion solution is stired and make muddy, emitted by dissolving tank lower part outlet valve, get into plate-and-frame filter press (filtering accuracy is less than 50um), filtrating gets into microfroc filter and filters, and gets into the acid adjustment groove again, and filter residue is directly discharged, packed.In the acid adjustment groove, open stirring rake, slowly add hydrochloric acid (weight percent concentration is 30%) 35L, regulator solution pH value=8.5.Solution is squeezed in the condensing crystal device, opened oily heating, stirring and vacuum pump, vacuum tightness is-0.75MPa that Heating temperature is set at 145 ℃.After 20 hours, the proportion of saturated solution is 1.246g/cm
3, stop heating, destroy vacuum, magma is entered whizzer, behind the centrifuge dripping, obtain drying crystal and mother liquor.Mother liquor returns the condensing crystal device.Dry crystal and get into fluidized-bed, temperature is set at 330 ℃, obtains the composite salt product after the oven dry, meets index.See shown in the table 1.
Embodiment 6
Open crusher, the metallurgical by product of bulk tantalum is dropped into crusher, be crushed to 10～40mm sized particles.In dissolving tank, add the 900L pure water, open heating, be heated to 72 ℃, open the stirring rake and the ventilation of dissolving tank again, slowly add byproduct particles 450kg, stirring rake is closed in dissolving fully after 7 hours, leaves standstill clarification 8 hours; Open dissolving tank centre exit valve, supernatant liquid is put into microfroc filter filter (filtering accuracy is less than 1um), filtrating is filtered in the acid adjustment groove.After dissolving tank lower floor slag inclusion solution is stired and make muddy, emitted by dissolving tank lower part outlet valve, get into plate-and-frame filter press (filtering accuracy is less than 50um), filtrating gets into microfroc filter and filters, and gets into the acid adjustment groove again, and filter residue is directly discharged, packed.In the acid adjustment groove, open stirring rake, slowly add hydrochloric acid (weight percent concentration is 30%) 20L, regulator solution pH value=7.5.Solution is squeezed in the condensing crystal device, opened oily heating, stirring and vacuum pump, vacuum tightness is-0.75MPa that Heating temperature is set at 135 ℃.After 25 hours, the proportion of saturated solution is 1.253g/cm
3, stop heating, destroy vacuum, magma is entered whizzer, behind the centrifuge dripping, obtain drying crystal and mother liquor.Mother liquor returns the condensing crystal device.Dry crystal and get into fluidized-bed, temperature is set at 290 ℃, obtains the composite salt product after the oven dry, meets index.
See shown in the table 1.
Table 1 composite salt standard and embodiment index value
| Title | pH | Fe(％) | Ni(％) | C(％) | H 2O(％) |
| The tantalum powder is used | 7.0-8.5 | ≤0.0005 | ≤0.0005 | ≤0.0015 | ≤0.05 |
| Tantalum potassium fluoride is used | 7.0-9.0 | ≤0.0005 | ≤0.0005 | ≤0.0025 | ≤0.2 |
| Embodiment 1 | 7.5 | ≤0.0005 | ≤0.0005 | 0.0013 | 0.03 |
| Embodiment 2 | 8.2 | ≤0.0005 | ≤0.0005 | 0.0012 | 0.03 |
| Embodiment 3 | 7.8 | ≤0.0005 | ≤0.0005 | 0.0014 | 0.04 |
| Embodiment 4 | 8.1 | ≤0.0005 | ≤0.0005 | 0.0015 | 0.03 |
| Embodiment 5 | 8.0 | ≤0.0005 | ≤0.0005 | 0.0014 | 0.02 |
| Embodiment 6 | 7.7 | ≤0.0005 | ≤0.0005 | 0.0012 | 0.02 |
The composite salt product that the foregoing description is produced, each index all reaches service requirements, sees for details shown in the table 1.
Claims (9)
1. method with the metallurgical by-product production composite salt of tantalum; It is characterized in that; Comprise the steps: in dissolving tank, to add pure water; Add the metallurgical by product of tantalum again; Consumption is the metallurgical by product of tantalum: pure water=1: 2-3, and the limit edged stirs, until dissolving fully; Obtain turbid solution, leave standstill clarification 6～10 hours; The solution supernatant liquid is emitted, carry out secondary filter, filter the back and get into the acid adjustment groove; Remaining slag inclusion solution is stired and make muddy, carried out coarse filtration, filtrating is carried out secondary filter more afterwards, and the clear liquid after the filtration gets into the acid adjustment groove; After in the acid adjustment groove, clear liquid pH value being adjusted to 7～9, again clear liquid evaporation concentration, centrifuge dripping are obtained the composite salt crystal, oven dry gets final product then.
2. the method with the metallurgical by-product production composite salt of tantalum as claimed in claim 1 is characterized in that: wherein the metallurgical by product of tantalum is a particulate state, and size is about 10～40mm.
3. the method with the metallurgical by-product production composite salt of tantalum as claimed in claim 2 is characterized in that: wherein dissolution process is earlier pure water to be heated to 60～90 ℃, adds the metallurgical byproduct particles of tantalum again.
4. the method with the metallurgical by-product production composite salt of tantalum as claimed in claim 1 is characterized in that: wherein secondary filter adopts microfroc filter to carry out, and filtering accuracy reaches≤1 μ m, and anti-F
-, Cl
-Corrosion.
5. the method with the metallurgical by-product production composite salt of tantalum as claimed in claim 1 is characterized in that: wherein coarse filtration adopts plate-and-frame filter press or suction filter filter cloth to filter, and filtering accuracy reaches≤200 orders, and anti-F
-, Cl
-Corrosion.
6. the method with the metallurgical by-product production composite salt of tantalum as claimed in claim 1; It is characterized in that: wherein in the acid adjustment groove, use the hydrofluoric acid of 20-40% weight percent or the hydrochloric acid of 20-35% weight percent; Under stirring condition; Join in the clear liquid after the secondary filter, regulate pH value to 7～9.
7. the method with the metallurgical by-product production composite salt of tantalum as claimed in claim 1, it is characterized in that: wherein evaporation concentration is carried out in the condensing crystal device, and crystallization time is 5-48h.
8. the method with the metallurgical by-product production composite salt of tantalum as claimed in claim 1; It is characterized in that: wherein centrifuge dripping carries out in the condensing crystal device; Utilize whizzer that magma is separated into mother liquor and the mixing salt crystal that contains less water, require mixing salt crystal water content≤10%.
9. the method with the metallurgical by-product production composite salt of tantalum as claimed in claim 1 is characterized in that: wherein oven dry is with fluidized-bed or resistance-type heating converter, and under 120-350 ℃ of condition, oven dry composite salt crystal requires crystal product water content≤0.05%.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101420321A CN102352444B (en) | 2011-05-30 | 2011-05-30 | Method for producing compound salts by tantalum metallurgy byproducts |
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|---|---|---|---|
| CN2011101420321A CN102352444B (en) | 2011-05-30 | 2011-05-30 | Method for producing compound salts by tantalum metallurgy byproducts |
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| CN102352444B CN102352444B (en) | 2013-07-24 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109399669A (en) * | 2018-10-31 | 2019-03-01 | 株洲高力新材料有限公司 | A method of the useless complex salt by-product and useless wash water of processing sodium reduction production tantalum powder |
| CN109468473A (en) * | 2018-12-29 | 2019-03-15 | 株洲硬质合金集团有限公司 | A kind of method of tantalum metallurgy by-product complex salt recycling and reusing |
| CN112358104A (en) * | 2020-09-28 | 2021-02-12 | 稀美资源(广东)有限公司 | Wastewater and waste residue recycling treatment system and method in tantalum powder smelting production |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1159424A (en) * | 1995-11-30 | 1997-09-17 | 奥斯兰姆施尔凡尼亚公司 | Method for dissolution and purification of tantalum pentoxide |
| CN1399613A (en) * | 1999-12-28 | 2003-02-26 | 三井金属矿业株式会社 | Method for producing fluorinated potassium tantalate crystal and fluorinated potassium tantalate crystal |
| CN1460088A (en) * | 2001-04-06 | 2003-12-03 | 三井金属鉱业株式会社 | Method for producing high purity potassium fluorotantalate crystal or high purity potassium fluoroniobate crystal and recrystallization vessel for use in method for production, and potassium |
-
2011
- 2011-05-30 CN CN2011101420321A patent/CN102352444B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1159424A (en) * | 1995-11-30 | 1997-09-17 | 奥斯兰姆施尔凡尼亚公司 | Method for dissolution and purification of tantalum pentoxide |
| CN1399613A (en) * | 1999-12-28 | 2003-02-26 | 三井金属矿业株式会社 | Method for producing fluorinated potassium tantalate crystal and fluorinated potassium tantalate crystal |
| CN1460088A (en) * | 2001-04-06 | 2003-12-03 | 三井金属鉱业株式会社 | Method for producing high purity potassium fluorotantalate crystal or high purity potassium fluoroniobate crystal and recrystallization vessel for use in method for production, and potassium |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109399669A (en) * | 2018-10-31 | 2019-03-01 | 株洲高力新材料有限公司 | A method of the useless complex salt by-product and useless wash water of processing sodium reduction production tantalum powder |
| CN109468473A (en) * | 2018-12-29 | 2019-03-15 | 株洲硬质合金集团有限公司 | A kind of method of tantalum metallurgy by-product complex salt recycling and reusing |
| CN112358104A (en) * | 2020-09-28 | 2021-02-12 | 稀美资源(广东)有限公司 | Wastewater and waste residue recycling treatment system and method in tantalum powder smelting production |
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|---|---|
| CN102352444B (en) | 2013-07-24 |
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