CN109837399A - A kind of technique of fluorine-containing solution of zinc sulfate fluorine removal - Google Patents
A kind of technique of fluorine-containing solution of zinc sulfate fluorine removal Download PDFInfo
- Publication number
- CN109837399A CN109837399A CN201910151667.4A CN201910151667A CN109837399A CN 109837399 A CN109837399 A CN 109837399A CN 201910151667 A CN201910151667 A CN 201910151667A CN 109837399 A CN109837399 A CN 109837399A
- Authority
- CN
- China
- Prior art keywords
- fluorine
- zinc sulfate
- containing solution
- technique
- zinc
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- 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
Sulfuric acid and calcium carbonate is successively added after the preheating of fluorine-containing solution of zinc sulfate in a kind of technique of fluorine-containing solution of zinc sulfate fluorine removal, stirs insulation reaction, and flocculant is added, and stirs, and stands, takes supernatant liquid filtering, obtain fluorine removal solution of zinc sulfate.Concentration≤23.5mg/L of fluorine ion in fluorine removal solution of zinc sulfate obtained by present invention process complies fully with electrolysis zinc technology requirement, and fluoride removing rate >=92%, and defluorination effect is good, and zinc ion loss is few；Present invention process operating process is simple, and reagent and operation cost are low, environmentally protective, is suitable for industrial applications.
Description
Technical field
The present invention relates to a kind of techniques of solution fluorine removal, and in particular to a kind of technique of fluorine-containing solution of zinc sulfate fluorine removal.
Background technique
Zinc hydrometallurgy is the main method of zinc metallurgy, and 80 about percent zinc concentrate is all by hydrometallurgy institute in the world
?.So just needing a series of problems for solving to face in zinc hydrometallurgy, wherein fluorine removal is then inevitable an important ring
Section.Due to containing fluorine in production raw material, fluorine is entered in solution in the form of ions, and as a kind of impurity, fluorine is deposited
Can have an adverse effect to sulfuric acid zinc electrolysis, in brief, in terms of mainly having following two: on the one hand, fluorine ion is to electrolysis
Electrode has corrosivity, can damage cathode, shortens cathode service life；On the other hand, the zinc metal sheet due to cathode and electrolysis out
It is sticked together, causes removing difficult, labor intensity increases, and labor productivity is low.Therefore, under normal circumstances, solution of zinc sulfate
In fluorine content need to be reduced to 50mg/L or less.
Aiming at the problem that the existing fluorine removal from fluorine-containing solution of zinc sulfate, a large amount of research work has been done.
CN107130258A discloses a kind of method of fluorine removal from fluorine-containing solution of zinc sulfate, is in fluorine-containing solution of zinc sulfate
The concentration of fluorine can be down to 40~100mg/L from 100~500mg/L by middle addition calcium carbonate.Although this method is simple, at low cost,
But the fluorine content after fluorine removal is still higher, it cannot be guaranteed that be reduced to 50 mg/L hereinafter, and the pH value of solution of zinc sulfate can rise
Height causes zinc ion hydrolytic precipitation.
CN106521186A disclose it is a kind of using sodium aluminate in zinc solution fluorine removal new method, can be dense by fluorine ion
Degree is down to 50mg/L from 600mg/L.But have the drawback that the price of sodium aluminate is high, lead to the at high cost of fluorine removal.
CN101492772A discloses a kind of method of zinc hydrometallurgy industrialization fluorine removal by ion exchange chlorine, is handed over ion
It changes resin D201 and carries out fluorine removal.Although defluorination effect is good, the waste water generated during fluorine removal up to hundreds of tons daily,
It is unfavorable for environmental protection.
CN102534216A discloses a kind of technique that fluorine is removed from zinc hydrometallurgy leachate, is containing bastnaesite
Ore is raw material, after broken, screening, is prepared into defluorinating agent.But having the drawback that Rare Earth Mine price is high, transport is not square
Just, bastnaesite inevitably contains radioactive element.
CN104399430A discloses a kind of preparation applied to the compound defluorination material of fluorine removal in electrolysis solution of zinc sulfate
Method is with the bamboo charcoal Jing Guo working process for handling the electrolysis solution of zinc sulfate that fluorinated volume is 44ppm.But it is existing
The disadvantage is that the high solution of zinc sulfate of fluorinated volume cannot be handled, and preparation process is relatively complicated.
CN108220598A discloses a kind of method of fluorine in abjection solution of zinc sulfate, is the oxide with rare earth element
And/or hydroxide carries out fluorine removal.But it has the drawback that, at high cost, and the fluoride removing rate highest only 90.2% of rare earth element.
CN102336429A discloses a kind of method for removing fluorine in solution of zinc sulfate, is that rare earth cerous carbonate and solution is added
In fluorine ion reacted, generate cerium fluoride precipitating.But there are the shortcomings that be equally that rare earth material cost is excessively high.
CN1966407A discloses a kind of fluorine-removing process for zinc sulphate solution, is by the way that Al is added3+And PO4 3-, generate precipitating
And make F-It is removed from solution.But due to the price of the aluminum sulfate of addition and sodium phosphate height, so that fluorine removal cost is excessively high.
Summary of the invention
The technical problem to be solved by the present invention is to overcome drawbacks described above of the existing technology, provide a kind of fluorine removal effect
Fruit is good, and zinc ion loss is few, and operating process is simple, and reagent and operation cost are low, environmentally protective, is suitable for industrial applications
The technique of fluorine-containing solution of zinc sulfate fluorine removal.
The technical solution adopted by the present invention to solve the technical problems is as follows: a kind of work of fluorine-containing solution of zinc sulfate fluorine removal
Sulfuric acid and calcium carbonate is successively added after the preheating of fluorine-containing solution of zinc sulfate in skill, stirs insulation reaction, and flocculant is added, and stirs,
It stands, takes supernatant liquid filtering, obtain fluorine removal solution of zinc sulfate.
The principle of the present invention can be indicated with following chemical equation:
CaCO3+H2SO4=CO2 +H2O+Ca2++SO4 2- (1)；
Ca2++2F-=CaF2(s) (2).
If being directly added into Ca (OH) in fluorine-containing solution of zinc sulfate2Or CaCO3, the pH value of solution of zinc sulfate can increase,
Zinc ion is caused to generate zinc hydroxide precipitation, so as to cause the loss of zinc.And the calcium source of present invention process be by reaction (1) come
It provides, can calculate fluorine removal needs how much calcium by reacting (2), to further calculate out the matter of the calcium carbonate and sulfuric acid that are added
Amount.The purpose for the arrangement is that guaranteeing to provide the calcium ion of fresh high activity, can quickly it be combined with fluorine ion, and more effective, anti-
The carbon dioxide gas that should be generated in the process plays impact-response product and provides new reaction interface, and zinc sulfate is molten
The pH value of liquid will not change, and maintain the 5.0~5.2 of starting, not will cause the loss of zinc；And operation can be accurate in this way
The additional amount for controlling calcium, if being directly added into Ca (OH)2Or CaCO3, then blindness is had.CaCl should not more be added2, because chlorine from
Son is brought into solution of zinc sulfate nocuousness.
Preferably, the pH value of the fluorine-containing solution of zinc sulfate is 5.0~5.2, Zn2+Mass concentration be 40~45g/L, F-
Mass concentration be 200~700mg/L.Fluorine-containing solution of zinc sulfate source Mr. Yu company zinc hydrometallurgy used in present invention process
Neutrality leaches process.
Preferably, the temperature of the preheating is 40~50 DEG C.CaF is more advantageous to by preheating2Sinking and particle length
Greatly.
Preferably, the molar ratio of the fluorine in the fluorine-containing solution of zinc sulfate and sulfuric acid and calcium carbonate is 1:0.75~1.0:
0.75~1.0.It is further preferred that the molar ratio of sulfuric acid and calcium carbonate is 1:1.In order to which fluorine removal is thorough, the dosage of sulfuric acid and calcium carbonate must
It must be excessive.Although after sulfuric acid and calcium carbonate are excessively used, having remaining calcium sulfate and being present in solution of zinc sulfate, entire
It will not be accumulated in system, calcium sulfate can remove in the cooling deliming technique of zinc hydrometallurgy.
Preferably, the mass concentration of the sulfuric acid is 90~98%.
Preferably, when the insulation reaction, the speed of stirring is 300~600r/min.If mixing speed is too slow, stir
Unfavorable to reacting, if mixing speed is too fast, particle is not easy to grow up.
Preferably, the temperature of the insulation reaction is 40~50 DEG C, and pH value is 5.0~5.2, and the time is 60~90min.?
At 40~50 DEG C, it is more advantageous to calcirm-fluoride particle growth, it is more complete by the reaction of 60~90min.
Preferably, the additional amount of the flocculant is 1~10ppm.The effect that flocculant is added is to speed up fluorination calcium particle
The speed of precipitating, at high cost if dosage is excessive, if dosage is very few, flocculating effect is bad.
Preferably, the flocculant is non-ionic polyacrylamide.It is highly preferred that the non-ionic polyacrylamide
Molecular weight be 500~12,000,000.
Preferably, after the addition flocculant, the speed of stirring is 300~400r/min, and the time is 4~6min.It is described
If the speed of stirring is too fast, particle granules can be smashed.
Preferably, the time of the standing is 10~20h.If the time stood is too short, precipitate unstable.
Preferably, the filtering uses Gore filter.
Fluorine ion xylenol orange-zirconium colorimetric method for determining, zinc ion ICP-OES plasma optical emission in present invention process
Spectrometer analysis.
Present invention process has the beneficial effect that:
(1) obtained by present invention process in fluorine removal solution of zinc sulfate fluorine ion concentration≤23.5mg/L, comply fully with electrolytic zinc work
Skill requirement, and fluoride removing rate >=92%, defluorination effect is good, and zinc ion loss is few；
(2) present invention process operating process is simple, and reagent and operation cost are low, environmentally protective, is suitable for industrial applications.
Specific embodiment
Below with reference to embodiment, the invention will be further described.
Fluorine-containing solution of zinc sulfate source Mr. Yu company zinc hydrometallurgy neutrality used in the embodiment of the present invention leaches process；This
The mass concentration of sulfuric acid used in inventive embodiments is 98%, and density is 1.8305 g/cm3；Used in the embodiment of the present invention
The molecular weight of non-ionic polyacrylamide is 10,000,000；Raw material or chemical reagent used in the embodiment of the present invention, such as without spy
Different explanation, is obtained by routine business approach.
Fluorine ion xylenol orange-zirconium colorimetric method for determining, zinc ion ICP-OES plasma optical emission in present invention process
Spectrometer analysis.
Embodiment 1
By 3.0L fluorine-containing solution of zinc sulfate (pH value 5.0, Zn2+Mass concentration be 45g/L(Zn2+For 1.032mol), F-'s
Mass concentration is 300mg/L(F-After being preheated to 50 DEG C for 0.0474mol)), 1.91mL(0.0357mol is successively added) sulfuric acid and
3.573g(0.0357mol) calcium carbonate is 400r/min in speed, 50 DEG C, under pH value=5.0, stirs insulation reaction 60min, add
The non-ionic polyacrylamide for entering 1ppm stirs 5min under 400r/min speed, stands 18h, takes supernatant Ge Er mistake
Filter filtering, obtains 1498mL fluorine removal solution of zinc sulfate.
Through detecting, the concentration of fluorine ion is 15.77mg/L, zinc ion in fluorine removal solution of zinc sulfate obtained by the embodiment of the present invention
Mass concentration be 45g/L, fluoride removing rate 94.75%, zinc ion loss is few；The washing that fluorine removal slag can be 5 with pH value is recycled
Zinc.
Embodiment 2
By 3.0L fluorine-containing solution of zinc sulfate (pH value 5.1, Zn2+Mass concentration be 40g/L(Zn2+For 0.917mol), F-'s
Mass concentration is 500mg/L(F-After being preheated to 45 DEG C for 0.0790mol)), 4.2mL(0.0785mol is successively added) sulfuric acid and
7.857g(0.0785mol) calcium carbonate is 500r/min in speed, 45 DEG C, under pH value=5.1, stirs insulation reaction 90min, add
The non-ionic polyacrylamide for entering 5ppm stirs 5min under 400r/min speed, stands 12h, takes supernatant Ge Er mistake
Filter filtering, obtains 1497mL fluorine removal solution of zinc sulfate.
Through detecting, the concentration of fluorine ion is 23.50mg/L, zinc ion in fluorine removal solution of zinc sulfate obtained by the embodiment of the present invention
Mass concentration be 40g/L, fluoride removing rate 95.30%, zinc ion loss is few；The washing that fluorine removal slag can be 5 with pH value is recycled
Zinc.
Embodiment 3
By 3.0L fluorine-containing solution of zinc sulfate (pH value 5.2, Zn2+Mass concentration be 43g/L(Zn2+For 0.986mol), F-'s
Mass concentration is 700mg/L(F-After being preheated to 40 DEG C for 0.111mol)), 5.9mL(0.110mol is successively added) sulfuric acid and
11.010g(0.110mol) calcium carbonate is 400r/min in speed, 40 DEG C, under pH value=5.2, stirs insulation reaction 80min, add
The non-ionic polyacrylamide for entering 10ppm stirs 4min under 300r/min speed, stands 20h, takes supernatant Ge Er
Filter filtering, obtains 1495mL fluorine removal solution of zinc sulfate.
Through detecting, the concentration of fluorine ion is 21.88mg/L, zinc ion in fluorine removal solution of zinc sulfate obtained by the embodiment of the present invention
Mass concentration be 43g/L, fluoride removing rate 96.88%, zinc ion loss is few；The washing that fluorine removal slag can be 5 with pH value is recycled
Zinc.
Embodiment 4
By 1.8L fluorine-containing solution of zinc sulfate (pH value 5.2, Zn2+Mass concentration be 41g/L(Zn2+For 0.940mol), F-'s
Mass concentration is 200mg/L(F-After being preheated to 40 DEG C for 0.0189mol)), 0.85mL(0.0159mol is successively added) sulfuric acid and
1.591g(0.0159mol) calcium carbonate is 600r/min in speed, 40 DEG C, under pH value=5.2, stirs insulation reaction 80min, add
The non-ionic polyacrylamide for entering 10ppm stirs 6min under 300r/min speed, stands 10h, takes supernatant Ge Er
Filter filtering, obtains 1497mL fluorine removal solution of zinc sulfate.
Through detecting, the concentration of fluorine ion is 15.43mg/L, zinc ion in fluorine removal solution of zinc sulfate obtained by the embodiment of the present invention
Mass concentration be 41g/L, fluoride removing rate 92.30%, zinc ion loss is few；The washing that fluorine removal slag can be 5 with pH value is recycled
Zinc.
Claims (9)
1. a kind of technique of fluorine-containing solution of zinc sulfate fluorine removal, it is characterised in that: after the preheating of fluorine-containing solution of zinc sulfate, be successively added
Sulfuric acid and calcium carbonate stir insulation reaction, and flocculant is added, and stir, and stand, take supernatant liquid filtering, obtain fluorine removal solution of zinc sulfate.
2. the technique of fluorine-containing solution of zinc sulfate fluorine removal according to claim 1, it is characterised in that: the fluorine-containing solution of zinc sulfate
PH value be 5.0~5.2, Zn2+Mass concentration be 40~45g/L, F-Mass concentration be 200~700mg/L.
3. the technique of fluorine-containing solution of zinc sulfate fluorine removal according to claim 1 or claim 2, it is characterised in that: the temperature of the preheating
It is 40~50 DEG C.
4. the technique of fluorine-containing solution of zinc sulfate fluorine removal described according to claim 1~one of 3, it is characterised in that: the sulfur contained quarry
The molar ratio of fluorine and sulfuric acid and calcium carbonate in sour zinc solution is 1:0.75~1.0:0.75~1.0；The quality of the sulfuric acid is dense
Degree is 90~98%.
5. the technique of fluorine-containing solution of zinc sulfate fluorine removal described according to claim 1~one of 4, it is characterised in that: the heat preservation is anti-
At once, the speed of stirring is 300~600r/min.
6. the technique of fluorine-containing solution of zinc sulfate fluorine removal described according to claim 1~one of 5, it is characterised in that: the heat preservation is anti-
The temperature answered is 40~50 DEG C, and pH value is 5.0~5.2, and the time is 60~90min.
7. the technique of fluorine-containing solution of zinc sulfate fluorine removal described according to claim 1~one of 6, it is characterised in that: the flocculant
Additional amount be 1~10ppm；The flocculant is non-ionic polyacrylamide.
8. the technique of fluorine-containing solution of zinc sulfate fluorine removal described according to claim 1~one of 7, it is characterised in that: the addition wadding
After solidifying agent, the speed of stirring is 300~400r/min, and the time is 4~6min.
9. the technique of fluorine-containing solution of zinc sulfate fluorine removal described according to claim 1~one of 8, it is characterised in that: the standing
Time is 10~20h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910151667.4A CN109837399B (en) | 2019-02-28 | 2019-02-28 | Fluorine removal process for fluorine-containing zinc sulfate solution |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910151667.4A CN109837399B (en) | 2019-02-28 | 2019-02-28 | Fluorine removal process for fluorine-containing zinc sulfate solution |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109837399A true CN109837399A (en) | 2019-06-04 |
| CN109837399B CN109837399B (en) | 2021-07-13 |
Family
ID=66885205
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910151667.4A Active CN109837399B (en) | 2019-02-28 | 2019-02-28 | Fluorine removal process for fluorine-containing zinc sulfate solution |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109837399B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110735048A (en) * | 2019-11-21 | 2020-01-31 | 株洲冶炼集团股份有限公司 | Method for removing magnesium and fluorine from zinc-containing solution of wet-method zinc smelting |
| CN112267023A (en) * | 2020-09-25 | 2021-01-26 | 衢州华友钴新材料有限公司 | Two-stage defluorination method for fluorine-containing material |
| CN113215414A (en) * | 2021-05-17 | 2021-08-06 | 云南云铜锌业股份有限公司 | Method for removing magnesium in zinc hydrometallurgy process |
| CN113235134A (en) * | 2021-04-20 | 2021-08-10 | 昆明冶金研究院有限公司 | Method for separating fluorine and chlorine from zinc sulfate solution and recycling zinc sulfate solution and application of method |
| CN114214524A (en) * | 2021-12-28 | 2022-03-22 | 东北大学 | Defluorination comprehensive treatment method for hydrolyzed liquid of electric zinc production |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4567027A (en) * | 1983-07-19 | 1986-01-28 | Metallurgie Hoboken-Overpelt | Process for defluorinating an acid sulphate solution |
| CN103725883A (en) * | 2013-12-13 | 2014-04-16 | 来宾华锡冶炼有限公司 | Method for preparing zinc sulfate solution de-fluorination agent |
| CN105112660A (en) * | 2015-10-16 | 2015-12-02 | 江西理工大学 | Method for removing fluorine and chlorine in zinc sulfate solution |
| CN107130258A (en) * | 2017-05-24 | 2017-09-05 | 中南大学 | A kind of method of the fluorine removal from fluorine-containing solution of zinc sulfate |
| CN108373140A (en) * | 2018-02-26 | 2018-08-07 | 中南大学 | A method of removing fluorine from sulfate liquor |
-
2019
- 2019-02-28 CN CN201910151667.4A patent/CN109837399B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4567027A (en) * | 1983-07-19 | 1986-01-28 | Metallurgie Hoboken-Overpelt | Process for defluorinating an acid sulphate solution |
| CN103725883A (en) * | 2013-12-13 | 2014-04-16 | 来宾华锡冶炼有限公司 | Method for preparing zinc sulfate solution de-fluorination agent |
| CN105112660A (en) * | 2015-10-16 | 2015-12-02 | 江西理工大学 | Method for removing fluorine and chlorine in zinc sulfate solution |
| CN107130258A (en) * | 2017-05-24 | 2017-09-05 | 中南大学 | A kind of method of the fluorine removal from fluorine-containing solution of zinc sulfate |
| CN108373140A (en) * | 2018-02-26 | 2018-08-07 | 中南大学 | A method of removing fluorine from sulfate liquor |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110735048A (en) * | 2019-11-21 | 2020-01-31 | 株洲冶炼集团股份有限公司 | Method for removing magnesium and fluorine from zinc-containing solution of wet-method zinc smelting |
| CN112267023A (en) * | 2020-09-25 | 2021-01-26 | 衢州华友钴新材料有限公司 | Two-stage defluorination method for fluorine-containing material |
| CN112267023B (en) * | 2020-09-25 | 2022-07-08 | 衢州华友钴新材料有限公司 | Two-stage defluorination method for fluorine-containing material |
| CN113235134A (en) * | 2021-04-20 | 2021-08-10 | 昆明冶金研究院有限公司 | Method for separating fluorine and chlorine from zinc sulfate solution and recycling zinc sulfate solution and application of method |
| CN113215414A (en) * | 2021-05-17 | 2021-08-06 | 云南云铜锌业股份有限公司 | Method for removing magnesium in zinc hydrometallurgy process |
| CN114214524A (en) * | 2021-12-28 | 2022-03-22 | 东北大学 | Defluorination comprehensive treatment method for hydrolyzed liquid of electric zinc production |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109837399B (en) | 2021-07-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109837399A (en) | A kind of technique of fluorine-containing solution of zinc sulfate fluorine removal | |
| CN110240182B (en) | Resourceful treatment method of lithium-rich aluminum electrolyte | |
| CN102899486B (en) | Method for leaching bastnaesite-containing rare-earth ore concentrates in complexing mode and preparing kryocide | |
| CN106745151B (en) | High waste acid containing the zinc comprehensive treatment utilization method | |
| CN107641714B (en) | Wet recovery processing method for lead-containing raw material | |
| CN102286759A (en) | Method for preparing electrodeposited zinc from high-fluorine high-chlorine secondary zinc oxide powder | |
| CN108396158A (en) | A kind of processing method of the complex salt crystal object of electrolytic manganese process | |
| CN112551566A (en) | Method for preparing aluminum fluoride and aluminum oxide by decarbonization and sodium removal of electrolytic aluminum carbon slag | |
| CN114702048A (en) | Lithium slag solid waste recycling process | |
| CN107056388A (en) | The preparation method of chemical polishing waste phosphoric acid processing method and fertilizer | |
| CN104726894A (en) | Gallium recycling method | |
| CN111377474B (en) | Method and equipment for purifying calcium fluoride from carbonate-removed fluorine-containing solid waste | |
| US4008162A (en) | Waste treatment of fluoroborate solutions | |
| CN113149052A (en) | Method for treating fluorine-containing waste electrolyte | |
| EP3265427B1 (en) | Process for manufacturing an aqueous sodium chloride solution | |
| CN104591247A (en) | Method for fluorine recovery from bastnaesite by alkali pulp countercurrent washing | |
| AU2017408055B2 (en) | Method for removing fluoride from a zinc-containing solution or suspension, defluoridated zinc sulfate solution and use thereof, and method for producing zinc and hydrogen fluoride or hydrofluoric acid | |
| CN109970102A (en) | A kind of method that aluminium ash prepares aluminium polychloride coproduction vanadic anhydride | |
| CN115403061A (en) | High-purity calcium chloride and concentration method thereof | |
| CN104591223A (en) | Method for treating fluosilicate waste residues | |
| CN112030003B (en) | Method for simultaneously removing multiple impurity ions in wet-process zinc smelting waste electrolyte | |
| Lindsay | Customer impacts of Na 2 O and CaO in smelter grade alumina | |
| CN110195162B (en) | Method for synchronously leaching and separating antimony, arsenic and alkali in arsenic-alkali residue | |
| CN1090553A (en) | With the titanium ore is the method for raw material enrichment titanium dioxide | |
| CN104591224A (en) | Treatment method for producing sodium permanganate waste residues |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |