CN102424914B - Method for comprehensively recovering aluminum and potassium from vanadium extraction from stone coal - Google Patents

Method for comprehensively recovering aluminum and potassium from vanadium extraction from stone coal Download PDF

Info

Publication number
CN102424914B
CN102424914B CN2011103864030A CN201110386403A CN102424914B CN 102424914 B CN102424914 B CN 102424914B CN 2011103864030 A CN2011103864030 A CN 2011103864030A CN 201110386403 A CN201110386403 A CN 201110386403A CN 102424914 B CN102424914 B CN 102424914B
Authority
CN
China
Prior art keywords
potassium
aluminium
solution
aluminum
ace
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.)
Expired - Fee Related
Application number
CN2011103864030A
Other languages
Chinese (zh)
Other versions
CN102424914A (en
Inventor
王学文
王明玉
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Central South University
Original Assignee
Central South University
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Central South University filed Critical Central South University
Priority to CN2011103864030A priority Critical patent/CN102424914B/en
Publication of CN102424914A publication Critical patent/CN102424914A/en
Application granted granted Critical
Publication of CN102424914B publication Critical patent/CN102424914B/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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

Landscapes

  • Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)

Abstract

The invention discloses a method for comprehensively recovering aluminum and potassium from vanadium extraction from stone coal. The technical process of the method mainly comprises: crystallizing pentaphyllum potassium aluminum sulfate in sulfuric acid leachate of stone coal; purifying pentaphyllum potassium aluminum sulfate recrystals, or adding water to dissolve the pentaphyllum potassium aluminum sulfate recrystals and adding a potassium-containing pH regulator to precipitate aluminum; filtering to obtain aluminum hydroxide and a potassium sulfate or potassium hydrogen sulfate solution; transforming the potassium sulfate or potassium hydrogen sulfate solution by lime to obtain potassium carbonate or potassium hydroxide; and thus, effectively separating and recovering aluminum and potassium. The method has the advantages that: the aluminum and potassium recovery rates are high; the products are diversified; impurities harmful to the recycling of water from vanadium extraction from stone coal are not introduced in the aluminum and potassium recovery technical process; the reagent consumption is small; the production cost is low; environment pollution is avoided; and the like.

Description

A kind of extracting vanadium from stone coal aluminium, potassium comprehensive recovering process
Technical field
The present invention relates to a kind of extracting vanadium from stone coal aluminium, potassium comprehensive recovering process.
Background technology
Bone coal is a kind of containing the vanadium multi-metal mineral wealth, usually contains SiO in bone coal 250%-75%, Al 2O 37%-17%, K 2O2%-5%, V 2O 50.15%-3.5%, containing V 2O 5Be greater than 0.8% bone coal and can be used as the navajoite exploitation.Aluminium in bone coal and potassium are mainly with potash mica (KAl 2(Si 3Al) O10 (OH) 2) and illite (K (Al, V) 2(Si, Al) 4O10 (OH) 2) form exist.The conventional process of extracting vanadium from stone coal is sulfuric acid leaching, and the technique of extracting at present vanadium from the bone coal acid dip solution has:
1) bone coal sulphuric leachate → ammonium salt is except the smart vanadium of aluminium → reduction → extraction → back extraction → oxidation → ammonium salt precipitation → calcine to obtain;
2) bone coal sulphuric leachate → ammonium salt is except the smart vanadium of aluminium → selective oxidation deironing → vanadium oxidation → ion-exchange → desorb → ammonium salt precipitation → calcine to obtain;
3) bone coal sulphuric leachate → ammonium salt is except the smart vanadium of aluminium → soak → purification and impurity removal of oxidation precipitation iron cpd → alkali → ammonium salt precipitation → calcine to obtain.
In the bone coal sulphuric leachate general containing Al up to 8～18g/L, the interference for fear of Al to the process for extracting vanadium process, the bone coal sulphuric leachate usually will add ammonia or ammonium salt to make aluminium in solution with Tai-Ace S 150 ammonium alum (NH before vanadium extraction 4Al (SO 4) 212H 2O) crystalline form is removed.Due to the complicated component of bone coal sulphuric leachate, add the chemical reagent that the process for extracting vanadium process adds, after vanadium extraction, liquid is recycled to the discharge of to a certain degree having to.Therefore, no matter the vanadium that adopts which kind of technique to extract in the bone coal sulphuric leachate all can produce ammonia nitrogen waste water, and the potassium in the bone coal sulphuric leachate does not all obtain effective recycling.
Summary of the invention
The object of the present invention is to provide and can avoid ammonia nitrogen waste water to produce, efficient recovery aluminium and potassium, improve the comprehensive utilization of resources rate, protection of the environment, a kind of extracting vanadium from stone coal aluminium, the potassium comprehensive recovering process that reduce production costs.
Technical scheme of the present invention comprises the following steps: in the bone coal sulphuric leachate, add rich potassium material except aluminium, the aluminium in solution is separated out with Tai-Ace S 150 arcanite (being alum) crystalline form, and guarantee after crystallization in liquid that the concentration of K maintains 0.1-15g/L; Tai-Ace S 150 arcanite recrystallization purification (can obtain high-purity alum); Or reclaim respectively aluminium and potassium after Tai-Ace S 150 arcanite transition, wherein Separation and Recovery obtains can be used as rich potassium material containing potassium solution and returns except the aluminium operation, also can join in Tai-Ace S 150 arcanite transformation process and recycle; Except after liquid vanadium extraction after aluminium, returning to bone coal acidleach operation, recycle.
Describedly add rich potassium material to refer in the bone coal sulphuric leachate and add K except aluminium 2SO 4, KHSO 4, KOH, K 2CO 3, KHCO 3In one or more, make aluminium in solution with Tai-Ace S 150 arcanite (KAl (SO 4) 212H 2O) form crystallization.
It is that Tai-Ace S 150 arcanite crystallisate is added to the water rising temperature for dissolving that described Tai-Ace S 150 arcanite is made the transition, add containing the potassium acidity regulator and make the transition, regulate pH value to 4.0～8.0 aluminium in solution is separated out with aluminum hydroxide precipitation, filter to obtain aluminum hydroxide filter cake and vitriolate of tartar and/or potassium hydrogen sulfate solution.
Described is KOH, K containing the potassium acidity regulator 2CO 3, KHCO 3In one or more.
The described water rising temperature for dissolving that adds refers to first and adds water by 1: 1～10g/ml of solid-to-liquid ratio, and 25～125 ℃ of stirrings make Tai-Ace S 150 arcanite dissolution of crystals.
Described aluminium hydroxide can, through calcining to obtain aluminum oxide, also can add sulfuric acid or dissolving with hydrochloric acid and obtain Tai-Ace S 150 or aluminum chloride.Described vitriolate of tartar and/or potassium hydrogen sulfate solution: can directly return to the bone coal sulphuric leachate and be used as rich potassium material except the aluminium operation; Also directly condensing crystal obtains vitriolate of tartar or sal enixum; Can also be to add calcium carbonate or barium carbonate to stir transition, filter to obtain gypsum or barium sulfate, and salt of wormwood and/or potassium bicarbonate solution.
Described calcining refers to that aluminium hydroxide obtains alumina product in 1-5 hour through 800-1250 ℃ of calcining.
Described vitriolate of tartar and/or potassium hydrogen sulfate solution add calcium carbonate or barium carbonate stirs 0.5-5 times that refers to transition by calcium sulfate or barium sulfate formation chemical reaction stoichiometric number, add calcium carbonate or barium carbonate, 0-100 ℃ is stirred 0.5-5 hour, make vitriolate of tartar or sal enixum in solution change into salt of wormwood or saleratus, filter to obtain calcium sulfate or barium sulfate solid, and salt of wormwood and/or potassium bicarbonate solution.
Described salt of wormwood and/or potassium bicarbonate solution directly return to the bone coal sulphuric leachate and are used as rich potassium material except the aluminium operation; Or return to Tai-Ace S 150 arcanite operation transition as containing the potassium acidity regulator; Or condensing crystal obtains salt of wormwood and/or saleratus, or add lime causticization, filter and to obtain calcium carbonate and alkalescence containing potassium solution.
Described salt of wormwood and/or potassium bicarbonate solution add lime causticization and refer to that the 0.15-3.5 by the chemical reaction stoichiometric number doubly adds calcium oxide or calcium hydroxide, 0-110 ℃ is stirred 1-3 hour, make salt of wormwood and/or saleratus in solution partly or entirely change into potassium hydroxide, filter and obtain alkalescence containing potassium solution.
Described alkalescence is directly returned to the bone coal sulphuric leachate containing potassium solution and is used as rich potassium material except the aluminium operation; Or return to Tai-Ace S 150 arcanite operation transition as recycling containing the potassium acidity regulator.
The present invention compares and has the following advantages and effect with existing technology:
Advantage of the present invention is that the potassium that dexterously recovery obtained is partly as the recycle of rich potassium material in technical process, rationally regulates aluminium in the bone coal pickling liquor/potassium mol ratio, makes aluminium wherein and potassium with Tai-Ace S 150 arcanite (KAl (SO 4) 212H 2O) form crystallization, the Tai-Ace S 150 arcanite subsequent disposal obtained can be carried out the diversity selection, directly further purifies or dissolve to make the transition into more value product required on other market.Therefore, the present invention purifies by Tai-Ace S 150 arcanite recrystallization, or becomes solution to make the transition by the potassium aluminium sulfate dissolution of crystals, to realize the high-recovery of aluminium and potassium, reclaim the variation of product, by technique of the present invention, can obtain comprising high-purity alum, aluminium hydroxide, aluminum oxide, K 2SO 4, KHSO 4, KOH, K 2CO 3, KHCO 3Deng product, K wherein 2SO 4, KHSO 4, KOH, K 2CO 3And KHCO 3Solution can be used as rich potassium material or recycle in the recovery process of aluminium and potassium containing the potassium acidity regulator; And can not introduce the impurity harmful to the extracting vanadium from stone coal water circulation use at aluminium of the present invention and potassium recovery process process.Integral body redesign by technique of the present invention, cooperatively interacting between each step, but thereby aluminium and potassium in efficient recovery extracting vanadium by acid leaching of stone coal liquid, avoided the generation of ammonia nitrogen waste water, reduce environmental pollution, also meet the development trend of China's energy-conserving and emission-cutting technology transformation.
Embodiment
Below in conjunction with embodiment, the invention will be further described, and following examples are intended to illustrate the present invention rather than limitation of the invention further.
Embodiment 1
Get containing V 2O 54.86g/L, the bone coal acid dip solution 2000ml of Al 13.46g/L, K 4.31g/L, first add calcium carbonate adjust pH to 1.5, then add 60g K 2CO 3Make aluminium in solution and the potassium form crystallization with alum, filter; Crystalline mother solution adds hydrogen peroxide to make ferrous iron wherein be oxidized to ferric iron and trivalent vanadium and tetravalence vanadium to be oxidized to the pentavalent vanadium, and 85 ℃ are stirred 0.5 hour, and vanadium and iron co-precipitation in solution are separated out, and filter containing liquid after vanadium ferric oxide and precipitation; Soak the recovery vanadium containing vanadium ferric oxide alkali, after precipitation, liquid returns to bone coal acidleach operation and recycles; After the alum that crystallization obtains adds the water rising temperature for dissolving by solid-to-liquid ratio 1: 3g/ml, stir and add potassium hydroxide to adjust pH 6.5, filtration washing, obtain aluminium hydroxide and potassium sulfate solution; Aluminium hydroxide obtains alumina product in 2 hours through 950 ℃ of calcinings; The potassium sulfate solution condensing crystal obtains potassium product.
Embodiment 2
Get containing V 2O 53.61g/L, the bone coal acid dip solution 3000ml of Al 11.35g/L, K 2.48g/L, the vitriolate of tartar 75g that adds embodiment 1 to obtain, make aluminium in solution and potassium with the form crystallization of alum, filters; After crystallization, liquid adds CaCO 3Be neutralized to the filtration of pH value to 2.0, filtrate is oxidized to ferric iron and trivalent vanadium and tetravalence vanadium by ferrous iron and is oxidized to 1.2 times of pentavalent vanadium chemistry reaction stoichiometric number and adds the potassium permanganate Oxidation at room temperature 6 hours, with strong alkali resin 201 * 7 absorption of bisulfate ion type, reclaims vanadium; Handing over rear liquid to return to bone coal acidleach operation recycles; After the alum of crystallization adds the water rising temperature for dissolving by solid-to-liquid ratio 1: 5g/ml, stir and add salt of wormwood to adjust pH 7.0, filtration washing, obtain aluminium hydroxide and potassium sulfate solution; Aluminium hydroxide adds sulfuric acid dissolution and obtains the Tai-Ace S 150 product; Potassium sulfate solution changes into 1.5 times of salt of wormwood chemical reaction stoichiometric number by vitriolate of tartar and adds barium carbonate, and 80 ℃ are stirred 2 hours, filter, and the filtrate condensing crystal obtains salt of wormwood.
Embodiment 3
Get containing V 2O 55.73g/L, the bone coal acid dip solution 1000ml of Al 9.13g/L, K 6.52g/L, first add calcium carbonate adjust pH to 1.6, then the salt of wormwood 15g that adds embodiment 2 to obtain, make aluminium in solution and potassium with the form crystallization of alum, filter; Crystalline mother solution first adds iron powder makes the ferric iron in solution be oxidized to ferrous iron, then reclaims vanadium with the P204 extraction; Raffinate returns to bone coal acidleach operation and recycles; After the alum of crystallization adds the water rising temperature for dissolving by solid-to-liquid ratio 1: 4g/ml, stir the salt of wormwood that adds embodiment 2 to obtain and adjust pH 72, filtration washing, obtain aluminium hydroxide and potassium sulfate solution; Aluminium hydroxide adds hydrochloric acid and dissolves to obtain the aluminum chloride product; Potassium sulfate solution changes into 2 times of salt of wormwood chemical reaction stoichiometric number by vitriolate of tartar and adds calcium carbonate, and 60 ℃ are stirred 3 hours transition, filtration washing; After transition, liquid adds 95 ℃, lime to stir 2 hours by 2 times of salt of wormwood causticization chemical reaction stoichiometric number again, filters to obtain potassium hydroxide solution.

Claims (6)

1. an extracting vanadium from stone coal aluminium, potassium comprehensive recovering process comprise the following steps: in the bone coal sulphuric leachate, add rich potassium material except aluminium, make aluminium in solution and potassium with Tai-Ace S 150 arcanite KAl (SO 4) 212H 2The form of O crystal is separated out, after crystallization in liquid the concentration of K maintain 0.1-15g/L; The Tai-Ace S 150 arcanite of gained reclaims respectively aluminium and potassium after transition, and wherein Separation and Recovery obtains containing potassium solution, as rich potassium material, return except the aluminium operation or join in Tai-Ace S 150 arcanite transformation process recycles; Except liquid after aluminium adopts solvent extration or ion exchange method or vanadium iron coprecipitation method Separation and Recovery vanadium wherein, after vanadium extraction, liquid returns to bone coal acidleach operation and recycles;
Described rich potassium material is K 2SO 4, KHSO 4, KOH, K 2CO 3, KHCO 3In one or more;
It is that Tai-Ace S 150 arcanite crystallisate is added to the water rising temperature for dissolving that described Tai-Ace S 150 arcanite makes the transition, add containing the potassium acidity regulator, regulate pH value to 4.0～8.0, the aluminium in solution is separated out with aluminum hydroxide precipitation, filter to obtain aluminum hydroxide filter cake, and vitriolate of tartar and/or potassium hydrogen sulfate solution;
Described vitriolate of tartar and/or potassium hydrogen sulfate solution directly return to the bone coal sulphuric leachate and are used as rich potassium material except the aluminium operation; Or directly condensing crystal obtains vitriolate of tartar and/or sal enixum; Or add calcium carbonate or barium carbonate transition, filter to obtain gypsum or barium sulfate, and salt of wormwood and/or potassium bicarbonate solution.
2. method according to claim 1, is characterized in that, the described water rising temperature for dissolving that adds refers to first and add water by solid-to-liquid ratio 1:1～10g/ml, and 25～125 ℃ of stirrings make Tai-Ace S 150 arcanite dissolution of crystals.
3. method according to claim 1 and 2, is characterized in that, described is KOH, K containing the potassium acidity regulator 2CO 3, KHCO 3In one or more.
4. method according to claim 1 and 2, described aluminium hydroxide, through calcining to obtain aluminum oxide; Or add sulfuric acid or dissolving with hydrochloric acid obtains Tai-Ace S 150 or aluminum chloride.
5. method according to claim 4, is characterized in that, described calcining refers to that aluminium hydroxide obtains alumina product in 1-5 hour through 800-1250 ℃ of calcining.
6. method according to claim 1, it is characterized in that, described vitriolate of tartar and/or potassium hydrogen sulfate solution add calcium carbonate or barium carbonate refer to transition form the chemical reaction stoichiometric number by calcium sulfate or barium sulfate 0.5-5 doubly, add calcium carbonate or barium carbonate, 0-100 ℃ is stirred 0.5-5 hour, make vitriolate of tartar or sal enixum in solution change into salt of wormwood or saleratus, filter to obtain calcium sulfate or barium sulfate solid, and salt of wormwood and/or potassium bicarbonate solution.
CN2011103864030A 2011-11-29 2011-11-29 Method for comprehensively recovering aluminum and potassium from vanadium extraction from stone coal Expired - Fee Related CN102424914B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2011103864030A CN102424914B (en) 2011-11-29 2011-11-29 Method for comprehensively recovering aluminum and potassium from vanadium extraction from stone coal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2011103864030A CN102424914B (en) 2011-11-29 2011-11-29 Method for comprehensively recovering aluminum and potassium from vanadium extraction from stone coal

Publications (2)

Publication Number Publication Date
CN102424914A CN102424914A (en) 2012-04-25
CN102424914B true CN102424914B (en) 2013-12-04

Family

ID=45958941

Family Applications (1)

Application Number Title Priority Date Filing Date
CN2011103864030A Expired - Fee Related CN102424914B (en) 2011-11-29 2011-11-29 Method for comprehensively recovering aluminum and potassium from vanadium extraction from stone coal

Country Status (1)

Country Link
CN (1) CN102424914B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3214190A1 (en) * 2016-03-01 2017-09-06 SMS Siemag Process Technologies GmbH Process for the separation of vanadium

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102787238A (en) * 2012-07-27 2012-11-21 武汉科技大学 Recycling method of raffinate during vanadium extraction from stone coal
CN102888512A (en) * 2012-09-27 2013-01-23 攀钢集团西昌钢钒有限公司 Impurity removing method of vanadium solution
CN104195330A (en) * 2014-08-07 2014-12-10 西北有色地质研究院 Technique for recovering crystals of aluminum potassium sulfate dodecahydrate in process of vanadium extraction via fly ash acid leaching
CN104789762B (en) * 2015-05-06 2017-08-08 武汉科技大学 A kind of mica-type bone coal extracts V2O5With KAl (SO4)2·12H2O method
CN106277010B (en) * 2016-08-24 2018-04-10 淄博市淄川程鹏化工厂 A kind of alum production technology
CN107058740A (en) * 2017-02-10 2017-08-18 河南理工大学 A kind of titanium white method for treating waste liquid
CN108707748B (en) * 2018-05-25 2020-11-17 中国科学院过程工程研究所 Method for purifying stone coal pickle liquor and recovering aluminum, potassium and iron
CN108559843B (en) * 2018-05-25 2020-11-03 中国科学院过程工程研究所 Method for treating stone coal pickle liquor
CN108754191B (en) * 2018-05-25 2020-10-27 中国科学院过程工程研究所 Method for treating stone coal pickle liquor
CN109930011B (en) * 2019-04-02 2021-09-03 武汉科技大学 Vanadium-aluminum separation method of vanadium-containing solution
CN111304440A (en) * 2020-04-07 2020-06-19 武汉科技大学 Aluminum removal method for shale vanadium extraction pickle liquor
CN112125325A (en) * 2020-09-29 2020-12-25 福州大学 Process for producing alumina by aluminosilicate mineral acid method
CN114797768B (en) * 2022-03-22 2023-08-11 中南大学 Magnesium phosphate double salt-activated carbon composite material, preparation method thereof and application thereof as potassium ion adsorption material

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101898791B (en) * 2010-06-25 2012-10-03 四川龙蟒钛业股份有限公司 Method for preparing rutile titanium dioxide from new process titanium slag

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3214190A1 (en) * 2016-03-01 2017-09-06 SMS Siemag Process Technologies GmbH Process for the separation of vanadium
WO2017148922A1 (en) * 2016-03-01 2017-09-08 Sms Group Process Technologies Gmbh Process for the separation of vanadium

Also Published As

Publication number Publication date
CN102424914A (en) 2012-04-25

Similar Documents

Publication Publication Date Title
CN102424914B (en) Method for comprehensively recovering aluminum and potassium from vanadium extraction from stone coal
CN102127657B (en) Comprehensive recovery method for extracting ferrovanadium from stone coal acid immersion liquid
CN101760651B (en) Process for extracting vanadium by acid leaching of stone coal
CN103922416B (en) A kind of method of Separation and Recovery iron from red mud
CN101597698B (en) Method for extracting vanadium by stone coal through acid leaching
CN104118893B (en) One utilizes titanium white waste acid manufacture level magnesium sulfate method
CN101705380A (en) Method for recovering rare earth from rare earth-containing aluminum-silicon materials
CN105861829A (en) Method for separating vanadium and chromium solution and recycling vanadium and chromium
CN101182037B (en) Method for reclaiming vanadium oxide from dephosphorization underflow slag
CN106282608B (en) A method of decomposing Scheelite-Wolframite Mixed Mine
CN106893877A (en) A kind of method that vanadium chromium is extracted in the chromic acid mixed salt solution from vanadium
CN105567964B (en) Method for selectively reducing, separating and recycling vanadium and chrome from solution containing vanadium and chrome
CN108707748B (en) Method for purifying stone coal pickle liquor and recovering aluminum, potassium and iron
CN103194611A (en) Method for producing vanadium oxide
CN107879363A (en) A kind of method that nitric acid decomposes phosphorus mine tailing extracting sulfuric acid calcium pyroborate by-product magnesium hydroxide and ammonium nitrate magnesium
CN101244843A (en) Method for recycling zirconium oxide and yttrium oxide from yttrium oxide steady zirconium oxide solid fused mass waste matter
CN105803199B (en) A kind of method that hydroxide precipitation method prepares low-sulfur rare earth oxide
CN104775041A (en) Clean vanadium extraction method for self-circulation utilization of vanadium-solution-calcium-process precipitated vanadium, mother liquor and solid waste
CN110240200B (en) Method for extracting tungsten from tungsten ore
CN104404274A (en) Method for precipitating, separating and recovering vanadium from vanadium-containing solution
CN107954474A (en) A kind of method that vanadium product and chromium sulfate basic are produced using vanadium chromium solution
CN110004294A (en) The processing method of scheelite caustic digestion slag
CN109336177B (en) Method for cleanly producing high-purity vanadium pentoxide by using hydrogen peroxide and ammonia water
CN110972479B (en) Method for producing zinc oxide by twice leaching method
CN110896643B (en) Method for producing zinc-containing compound or zinc oxide from zinc-containing raw ore through intermediate step of calcium zincate synthesis

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C14 Grant of patent or utility model
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20131204

Termination date: 20151129

CF01 Termination of patent right due to non-payment of annual fee