CN108862371A - A method of zinc oxide is produced using containing zinc ore crude - Google Patents
A method of zinc oxide is produced using containing zinc ore crude Download PDFInfo
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- CN108862371A CN108862371A CN201810817318.7A CN201810817318A CN108862371A CN 108862371 A CN108862371 A CN 108862371A CN 201810817318 A CN201810817318 A CN 201810817318A CN 108862371 A CN108862371 A CN 108862371A
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- Prior art keywords
- zinc
- calcium
- carbonate
- ore
- digestion agent
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- 239000011701 zinc Substances 0.000 title claims abstract description 130
- XLOMVQKBTHCTTD-UHFFFAOYSA-N zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 title claims abstract description 126
- 229910052725 zinc Inorganic materials 0.000 title claims abstract description 109
- HCHKCACWOHOZIP-UHFFFAOYSA-N zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 title claims abstract description 108
- 239000011787 zinc oxide Substances 0.000 title claims abstract description 63
- QGZKDVFQNNGYKY-UHFFFAOYSA-N ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims abstract description 60
- 238000000034 method Methods 0.000 claims abstract description 49
- 239000011575 calcium Substances 0.000 claims abstract description 36
- 229910052791 calcium Inorganic materials 0.000 claims abstract description 33
- OYPRJOBELJOOCE-UHFFFAOYSA-N calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims abstract description 32
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 25
- 238000004519 manufacturing process Methods 0.000 claims abstract description 21
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 19
- 238000002386 leaching Methods 0.000 claims abstract description 19
- 238000003786 synthesis reaction Methods 0.000 claims abstract description 19
- 230000002194 synthesizing Effects 0.000 claims abstract description 19
- 238000001354 calcination Methods 0.000 claims abstract description 13
- -1 calcium zinc Chemical compound 0.000 claims abstract description 5
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium monoxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 50
- 239000003795 chemical substances by application Substances 0.000 claims description 49
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate dianion Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 claims description 40
- AXCZMVOFGPJBDE-UHFFFAOYSA-L Calcium hydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims description 35
- 230000029087 digestion Effects 0.000 claims description 34
- 239000000920 calcium hydroxide Substances 0.000 claims description 33
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims description 33
- 229960005069 Calcium Drugs 0.000 claims description 29
- 239000000706 filtrate Substances 0.000 claims description 29
- 239000007787 solid Substances 0.000 claims description 28
- 239000000292 calcium oxide Substances 0.000 claims description 25
- VTYYLEPIZMXCLO-UHFFFAOYSA-L calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 24
- NSEQHAPSDIEVCD-UHFFFAOYSA-O azanium;zinc Chemical compound [NH4+].[Zn+2] NSEQHAPSDIEVCD-UHFFFAOYSA-O 0.000 claims description 22
- 150000002500 ions Chemical class 0.000 claims description 21
- 239000000047 product Substances 0.000 claims description 18
- 239000000126 substance Substances 0.000 claims description 18
- 229910000010 zinc carbonate Inorganic materials 0.000 claims description 18
- 239000011667 zinc carbonate Substances 0.000 claims description 17
- 239000001099 ammonium carbonate Substances 0.000 claims description 16
- PRKQVKDSMLBJBJ-UHFFFAOYSA-N Ammonium carbonate Chemical compound N.N.OC(O)=O PRKQVKDSMLBJBJ-UHFFFAOYSA-N 0.000 claims description 14
- 238000000605 extraction Methods 0.000 claims description 14
- LILHXQCLSOZSRO-UHFFFAOYSA-J dizinc;oxozinc;dicarbonate;tetrahydrate Chemical compound O.O.O.O.[Zn+2].[Zn+2].[Zn]=O.[Zn]=O.[Zn]=O.[O-]C([O-])=O.[O-]C([O-])=O LILHXQCLSOZSRO-UHFFFAOYSA-J 0.000 claims description 13
- 235000004416 zinc carbonate Nutrition 0.000 claims description 13
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 12
- 238000006243 chemical reaction Methods 0.000 claims description 12
- CURLTUGMZLYLDI-UHFFFAOYSA-N carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 10
- 238000003756 stirring Methods 0.000 claims description 10
- 229910000013 Ammonium bicarbonate Inorganic materials 0.000 claims description 9
- 235000012538 ammonium bicarbonate Nutrition 0.000 claims description 9
- 239000007864 aqueous solution Substances 0.000 claims description 9
- ATRRKUHOCOJYRX-UHFFFAOYSA-N azanium;hydron;carbonate Chemical compound [NH4+].OC([O-])=O ATRRKUHOCOJYRX-UHFFFAOYSA-N 0.000 claims description 9
- 239000001569 carbon dioxide Substances 0.000 claims description 9
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 9
- 238000001914 filtration Methods 0.000 claims description 9
- 229960003563 Calcium Carbonate Drugs 0.000 claims description 8
- 235000012501 ammonium carbonate Nutrition 0.000 claims description 7
- BVKZGUZCCUSVTD-UHFFFAOYSA-N Carbonic acid Chemical compound OC(O)=O BVKZGUZCCUSVTD-UHFFFAOYSA-N 0.000 claims description 5
- FMRLDPWIRHBCCC-UHFFFAOYSA-L zinc;carbonate Chemical compound [Zn+2].[O-]C([O-])=O FMRLDPWIRHBCCC-UHFFFAOYSA-L 0.000 claims description 5
- 238000001556 precipitation Methods 0.000 claims description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-O ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 claims description 2
- 238000011084 recovery Methods 0.000 abstract description 10
- 238000005516 engineering process Methods 0.000 abstract description 5
- 238000005265 energy consumption Methods 0.000 abstract description 4
- IWLXWEWGQZEKGZ-UHFFFAOYSA-N azane;zinc Chemical compound N.[Zn] IWLXWEWGQZEKGZ-UHFFFAOYSA-N 0.000 abstract description 2
- 238000005260 corrosion Methods 0.000 abstract description 2
- 235000014692 zinc oxide Nutrition 0.000 description 50
- 235000011116 calcium hydroxide Nutrition 0.000 description 23
- 239000004615 ingredient Substances 0.000 description 13
- 239000007788 liquid Substances 0.000 description 12
- 229960004424 Carbon Dioxide Drugs 0.000 description 7
- XLYOFNOQVPJJNP-ZSJDYOACSA-N heavy water Substances [2H]O[2H] XLYOFNOQVPJJNP-ZSJDYOACSA-N 0.000 description 7
- 229910021511 zinc hydroxide Inorganic materials 0.000 description 7
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 6
- UGZADUVQMDAIAO-UHFFFAOYSA-L Zinc hydroxide Chemical compound [OH-].[OH-].[Zn+2] UGZADUVQMDAIAO-UHFFFAOYSA-L 0.000 description 6
- 239000002994 raw material Substances 0.000 description 6
- XSMMCTCMFDWXIX-UHFFFAOYSA-N Zinc silicate Chemical compound [Zn+2].[O-][Si]([O-])=O XSMMCTCMFDWXIX-UHFFFAOYSA-N 0.000 description 5
- 239000004110 Zinc silicate Substances 0.000 description 5
- 238000002156 mixing Methods 0.000 description 5
- 230000001376 precipitating Effects 0.000 description 5
- 238000000926 separation method Methods 0.000 description 5
- 239000000243 solution Substances 0.000 description 5
- 235000019352 zinc silicate Nutrition 0.000 description 5
- 230000000536 complexating Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000000284 extract Substances 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 230000003647 oxidation Effects 0.000 description 4
- 238000007254 oxidation reaction Methods 0.000 description 4
- MYMOFIZGZYHOMD-UHFFFAOYSA-N oxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
- 239000001301 oxygen Substances 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- PTFCDOFLOPIGGS-UHFFFAOYSA-N zinc dication Chemical compound [Zn+2] PTFCDOFLOPIGGS-UHFFFAOYSA-N 0.000 description 4
- 238000003912 environmental pollution Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 238000000746 purification Methods 0.000 description 3
- 229940007718 zinc hydroxide Drugs 0.000 description 3
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonium chloride Substances [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 description 2
- 229910007661 ZnSiO3 Inorganic materials 0.000 description 2
- 235000019270 ammonium chloride Nutrition 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- UXVMQQNJUSDDNG-UHFFFAOYSA-L cacl2 Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 description 2
- 239000001110 calcium chloride Substances 0.000 description 2
- 229910001628 calcium chloride Inorganic materials 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 239000003153 chemical reaction reagent Substances 0.000 description 2
- 229910052681 coesite Inorganic materials 0.000 description 2
- 229910052906 cristobalite Inorganic materials 0.000 description 2
- 238000005261 decarburization Methods 0.000 description 2
- 238000005188 flotation Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- QDHHCQZDFGDHMP-UHFFFAOYSA-N monochloramine Chemical compound ClN QDHHCQZDFGDHMP-UHFFFAOYSA-N 0.000 description 2
- 238000006213 oxygenation reaction Methods 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 230000001698 pyrogenic Effects 0.000 description 2
- 229910052904 quartz Inorganic materials 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 229910052682 stishovite Inorganic materials 0.000 description 2
- 229910052905 tridymite Inorganic materials 0.000 description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-M Bicarbonate Chemical compound OC([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-M 0.000 description 1
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- 235000015450 Tilia cordata Nutrition 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 229910001308 Zinc ferrite Inorganic materials 0.000 description 1
- HYJPZWOFVGWLCA-UHFFFAOYSA-N [Zn].[NH4+].C([O-])([O-])=O.[NH4+] Chemical compound [Zn].[NH4+].C([O-])([O-])=O.[NH4+] HYJPZWOFVGWLCA-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 229910002090 carbon oxide Inorganic materials 0.000 description 1
- 238000003835 carbonate co-precipitation Methods 0.000 description 1
- 238000005039 chemical industry Methods 0.000 description 1
- 238000000975 co-precipitation Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000005712 crystallization Effects 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- FWABRVJYGBOLEM-UHFFFAOYSA-N diazanium;azane;carbonate Chemical compound N.[NH4+].[NH4+].[O-]C([O-])=O FWABRVJYGBOLEM-UHFFFAOYSA-N 0.000 description 1
- 235000013601 eggs Nutrition 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 150000004679 hydroxides Chemical class 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxyl anion Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 1
- 239000011133 lead Substances 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 239000002075 main ingredient Substances 0.000 description 1
- PWHULOQIROXLJO-UHFFFAOYSA-N manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000011572 manganese Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006011 modification reaction Methods 0.000 description 1
- 230000002035 prolonged Effects 0.000 description 1
- 238000010956 selective crystallization Methods 0.000 description 1
- 238000007086 side reaction Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- KEAYESYHFKHZAL-UHFFFAOYSA-N sodium Chemical compound [Na] KEAYESYHFKHZAL-UHFFFAOYSA-N 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
- FMRLDPWIRHBCCC-UHFFFAOYSA-N zinc;carbonic acid Chemical compound [Zn+2].OC(O)=O FMRLDPWIRHBCCC-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G9/00—Compounds of zinc
- C01G9/02—Oxides; Hydroxides
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/80—Compositional purity
Abstract
This disclosure relates to a kind of method using the production zinc oxide containing zinc ore crude, including leach step, optional purifying step, decarbonation process, calcium zincates synthesis step, optional rinse step, calcining step, calcium zinc separating step.Disclosed method is by wet-leaching in conjunction with synthesis technology, realize the economic and environment-friendly utilization of super low-grade zinc, it is applied widely, without ammonia still process, it is simple and easy to do, greatly reduce the energy consumption of technique, also avoid water process pressure caused by ammonia still process, various problems such as high temperature and pressure security risk and equipment corrosion, solves the environmental issue faced due to steam, which brings water more than needed into, influences process water balance in ammonia circulation technology, solve the problems, such as the technique rate of recovery and fine work grade, it pollutes small, supplies are recyclable, the calcium zincates synthesis under zinc ammonia environment is realized for the first time, and zinc oxide product is produced via calcium zincates.
Description
Technical field
The invention belongs to technical field of inorganic chemical industry, be related to the low-grade resource utilization containing zinc ore crude, in particular to one
The method that kind produces zinc oxide using low-grade zinc oxide raw ore.
Background technique
The production of China's zinc is ranked the first in the world with consumption, and domestic zinc resource is not able to satisfy production, needs import a large amount of every year
Zinc raw material.China is an oxidation zinc resource country more abundant, and zinc metal reserves are about 2800 in China's zinc oxide ore
Ten thousand tons, account for about 27.7% of zinc metal reserves in world's zinc oxide ore.Zinc oxide ore generally zinc grade in China's is low, average grade
Less than 5%, be still unable to the slow-witted mine of economic utilization at present, lean ore reserves account for the overwhelming majority, wherein existing stockpiling containing zinc oxide 3%~
The 5% more than one hundred million tons of mining tailing and milltailings.
Therefore, Efficient Development utilizes low-grade zinc oxide ore resource, for alleviating the insufficient problem of domestic zinc raw material supply
With important strategic importance.
The main technique that low-grade zinc oxide ore utilizes includes：Pyrogenic process produces secondary zinc oxide, due to the high energy consumption of the technique
With high pollution, limited by national industrial policies.
Flotation is the main technique of current processing zinc oxide ore, but for zinc oxide floatation process, external zinc oxide ore
Sorting index is：Zinc grade 36%~40%, the rate of recovery 60%~70%, up to 78%；China's zinc oxide ore sorting index
For：Zinc grade 35%~38%, rate of recovery average out to 68%, up to 73%.Therefore recovery rate in ore-dressing is low, and concentrate grade is low etc.
Problem is common problem existing for domestic and international zinc oxide ore ore dressing, while Flotation of Zinc Oxide needs to be added a large amount of vulcanized sodium and carries out sulphur
Change processing, the zinc after vulcanizing package is needed could be directly as production metallic zinc or life after pyrogenic process or pressure oxidation secondary treatment
Produce the raw material of zinc oxide.
For the wet underwater welding of zinc ore, mainly there are sulfuric acid leaching, Calcium Chloride Method, ammonium chloride method etc. in the prior art.
Sulfuric acid leaching is selectively low, can largely leach the solvable silicon in ore, and the colloidal state silicon of generation is difficult to filter, and the acid-hatching of young eggs is raw
At a large amount of sulfate slags, great environmental protection treatment pressure is caused；Sulfuric acid leaching also can not be effectively to zinc silicate, the iron in ore
The ingredients such as sour zinc are handled.The leaching of the ingredients such as zinc silicate in raw ore, zinc ferrite can not be effectively treated in Calcium Chloride Method, and leaches
Rate is undesirable, and high temperature is needed to leach, and overall economic efficiency is bad.And in ammonium chloride method, after being leached to raw ore, from leaching
The process that zinc ingredient is recycled in liquid is extremely difficult, is unsuitable for industrial application.
Therefore, existing technique to it is low-grade containing zinc ore crude using unsatisfactory.
Summary of the invention
Problems to be solved by the invention
Low-grade zinc oxide ore utilizes at present technique exist energy consumption is high, recovery rate in ore-dressing is low, cause Heavy environmental pollution,
The problems such as economic value is low.The present invention is solved present in zinc oxide ore utilization by the improvement to zinc oxide ore treatment process
The above problem.
The solution to the problem
In order to solve the problems existing in the prior art, the disclosure provides a kind of method using the production zinc oxide containing zinc ore crude,
Include the following steps：
Leach step：Being mixed after will be levigate containing zinc ore crude and digestion agent, then filters, obtains leachate, wherein
The digestion agent be ammonia and ammonium hydrogen carbonate mixed aqueous solution or ammonia and the mixed aqueous solution or ammonia of ammonium carbonate, ammonium hydrogen carbonate and
The mixed aqueous solution of ammonium carbonate；
Optionally, leachate obtained in the leach step is purified；
Decarbonation process：Calcium oxide and/or calcium hydroxide are added into the leachate, then stirring filters, obtains first
Solid and the first filtrate；
Calcium zincates synthesis step：Calcium hydroxide and/or calcium oxide is added to first filtrate, then stirring is filtered, obtained
To the second solid and the second filtrate；
Optionally, second solid is rinsed with water；
Calcining step：Second solid is taken to be calcined, calcination temperature is 150~1050 DEG C, preferably 150~350 DEG C；
Calcium zinc separating step：The calcined product that the calcining step obtains is mixed with water, is stirred, filtering obtains third
Solid and third filtrate, the third solid is dry, obtain zinc oxide product.
In the method for the utilization that disclosure further embodiment provides production zinc oxide containing zinc ore crude, the extraction
The mass concentration of total ammonia in agent is 5%~15%, and the molar concentration of effective carbonate in the digestion agent is：
CDigestion agent carbonate=(nThe total zinc of raw ore-nRaw ore zinc carbonate)×a/VDigestion agent
Wherein,
CDigestion agent carbonateFor the molar concentration of effective carbonate in the digestion agent,
nThe total zinc of raw oreFor the amount of the substance containing the Zn-ef ficiency in zinc ore crude,
nRaw ore zinc carbonateFor the amount of the substance containing the zinc carbonate in zinc ore crude,
VDigestion agentFor the volume of the digestion agent,
The value range of a is 100%~600%, preferably 150%~250%.
In the method for the utilization that disclosure further embodiment provides production zinc oxide containing zinc ore crude, in the leaching
It mentions in the leachate that step obtains, the concentration (in terms of the quality of Zn-ef ficiency) of zinc ammonium complex ion is 10~25g/L.
In the method for the utilization that disclosure further embodiment provides production zinc oxide containing zinc ore crude, described de-
The amount of the substance of the calcium oxide and/or calcium hydroxide that are added in carbon step is the substance of effective carbonate in the leachate
The 100% to 130% of amount, preferably 100% to 110%.
In the method for the utilization that disclosure further embodiment provides production zinc oxide containing zinc ore crude, in the zinc
In sour calcium synthesis step, it is added into first filtrate in amount and the first filtrate of the substance of calcium hydroxide and/or calcium oxide
The ratio between amount of substance of zinc ammonium complex ion is 1~1.2:2, preferably 1~1.1:2.
In the method for the utilization that disclosure further embodiment provides production zinc oxide containing zinc ore crude, to the zinc
Second filtrate that sour calcium synthesis step obtains is passed through carbon dioxide, will be passed through the second filtrate of carbon dioxide as extraction
Agent is recycled for the extraction containing zinc ore crude.
In the method for the utilization that disclosure further embodiment provides production zinc oxide containing zinc ore crude, the zincic acid
The reaction temperature of calcium synthesis step is 15~90 DEG C, preferably 30~60 DEG C, or preferably 15~25 DEG C.
In the method for the utilization that disclosure further embodiment provides production zinc oxide containing zinc ore crude, in the calcium
In zinc separating step, it is passed through carbon dioxide to the third filtrate, obtains precipitation of calcium carbonate.
The effect of invention
The disclosure realizes the Advantageous techniques effect of following one or more aspects：
1) by wet-leaching in conjunction with synthesis technology, the economic and environment-friendly utilization of super low-grade zinc is realized.
2) disclosed method is applied widely, and ammonia-ammonium bicarbonate Leaching Systems can be effectively to the former containing zinc of diversified forms
Mine is extracted and is utilized.
3) break traditional ammonia-ammonium carbonate method zinc complexing extracting technology by heating evaporation ammonia destroy complexing environment realize zinc from
Calcium oxide or hydroxide are added creatively into ammonium bicarbonate-zinc ammonia complex system by the orthodox practice of sub- Crystallization Separation, the application
Calcium moves zinc ammonium complex ion-zinc ion-calcium zincates balance, by flat under the premise of not destroying solution ammonia environment
The shifting principle that weighs realizes the selective crystallization separation of Zn-ef ficiency, and avoiding existing heating ammonia still process method from destroying ammonia environment causes impurity a large amount of
The phenomenon that co-precipitation.The technique of the disclosure is not necessarily to ammonia still process, simple and easy to do, greatly reduces the energy consumption of technique, it is thus also avoided that ammonia still process
Various problems such as caused water process pressure, high temperature and pressure security risk and equipment corrosion.
4) leaching and separation that zinc is realized by the circulation of carbonate solve in ammonia circulation technology because steam brings water more than needed into
Measure the environmental issue for influencing process water balance and facing.
5) relative to zinc oxide floatation process, disclosed method solves the problems, such as the technique rate of recovery and fine work grade, institute
The product obtained can also can be used as the raw material of industry directly as product.
6) disclosed method pollution is small, and supplies are recyclable, and it is former to solve existing zinc oxide treatment process auxiliary
The problem of expecting bring environmental pollution.
7) disclosure realizes the synthesis of the calcium zincates under zinc ammonia environment for the first time, and produces zinc oxide via calcium zincates and produce
Product, it is high from the reaction selectivity of zinc ammonium complex ion synthesis calcium zincates, it is simple and quick.
Specific embodiment
It will be detailed below various exemplary embodiments, feature and the aspect of the disclosure.Dedicated word " example herein
Property " mean " being used as example, embodiment or illustrative ".Here as any embodiment illustrated by " exemplary " should not necessarily be construed as
Preferred or advantageous over other embodiments.
In addition, giving numerous details in specific embodiment below in order to which the disclosure is better described.
In some instances, method well known to those skilled in the art, means, reagent and equipment are not described in detail, but ability
Field technique personnel can realize the technical solution of the disclosure according to the general knowledge of this field.
The scope of application of disclosed method is not particularly limited, and is widely portable to the various utilizations containing zinc ore crude.?
When using low-grade zinc oxide raw ore as raw materials for production, the advantages of method disclosed herein, is particularly pertinent.For example, low-grade former containing zinc
Mine can be zinc content 3%~15% containing zinc ore crude；Particularly, before the disclosure, zinc content contains 3%~6%
Zinc ore crude (lean ore, milltailings) is largely stored up, and existing various techniques are to can not make the utilization of existing economic value in fact
At very big processing pressure, and disclosed method is not only technically realized to such low-grade containing the effective of zinc ore crude
It utilizes, and simple process is easy, it is low in cost, there is very high economic value.
In the disclosure, the existence form containing zinc ingredient in zinc ore crude is not particularly limited, such as zinc ingredient can be with packet
The one or more forms for including but being not limited to zinc oxide, zinc carbonate, zinc silicate etc. exist.
Explanation of nouns
Herein, unless otherwise indicated, " ammine carbonate zinc " is zinc ammonium complex ion and the compound that carbonate is formed
General name, including [Zn (NH3)4]CO3(four ammino zinc of carbonic acid), [Zn (NH3)3]CO3(three ammino zinc of carbonic acid), [Zn (NH3)2]CO3
(two ammino zinc of carbonic acid), [Zn (NH3)]CO3(one ammino zinc of carbonic acid) etc..
Herein, unless otherwise indicated, " zinc ammonium complex ion " is the general name of ammino zinc complex ions at different levels, including [Zn
(NH3)4]2+(four ammino zinc ions), [Zn (NH3)3]2+(three ammino zinc ions), [Zn (NH3)2]2+(two ammino zinc ions), [Zn
(NH3)]2+(an ammino zinc ion) etc..
Herein, unless otherwise indicated, in solution (the including but not limited to various liquid such as digestion agent, leachate)
" effective carbonate " refers to the summation of carbonate and bicarbonate radical in the solution.
" optional " or " optionally " indicates that the then described step can carry out, or can be without, and the table
State include the steps that the then situation carried out and the then described step without situation.
Chemical equation
1. extraction
A. zinc oxide extracts
Ammonia and ammonium hydrogen carbonate are as digestion agent
ZnO+(i-1)NH3+NH4HCO3=[Zn (NH3)i]CO3+H2O (integer that i is 1 to 4)
Ammonia and ammonium carbonate are as digestion agent
ZnO+(i-2)NH3+(NH4)2CO3=[Zn (NH3)i]CO3+H2O (integer that i is 2 to 4)
B. zinc hydroxide extracts
Ammonia and ammonium hydrogen carbonate are as digestion agent
Zn(OH)2+(i-1)NH3+NH4HCO3=[Zn (NH3)i]CO3+2H2O
(integer that i is 1 to 4)
Ammonia and ammonium carbonate are as digestion agent
Zn(OH)2+(i-2)NH3+(NH4)2CO3=[Zn (NH3)i]CO3+2H2O
(integer that i is 2 to 4)
C. zinc carbonate (smithsonite) extracts
ZnCO3+iNH3=[Zn (NH3)i]CO3(integer that i is 1 to 4)
D. zinc silicate extracts
Ammonia and ammonium hydrogen carbonate are as digestion agent
ZnSiO3+(i-1)NH3+NH4HCO3=[Zn (NH3)i]CO3+H2O+SiO2
(integer that i is 1 to 4)
Ammonia and ammonium carbonate are as digestion agent
ZnSiO3+(i-2)NH3+(NH4)2CO3=[Zn (NH3)i]CO3+H2O+SiO2
(integer that i is 2 to 4)
2. decarburization
Lime is reacted with water
CaO+H2O=Ca (OH)2
Precipitating
Ca(OH)2+(NH4)2CO3=CaCO3↓+2NH3·H2O
Ca(OH)2+NH4HCO3=CaCO3↓+NH3+2H2O
[Zn(NH3)i]CO3+Ca(OH)2=[Zn (NH3)i](OH)2+CaCO3↓
(integer that i is 1 to 4)
The side reaction that may occur：
Ca(OH)2+[Zn(NH3)i]CO3=CaCO3↓+Zn(OH)2↓+iNH3
(integer that i is 1 to 4)
3. calcium zincates synthesize
2[Zn(NH3)i](OH)2+Ca(OH)2+2H2O=Ca (OH)2·2Zn(OH)2·2H2O+2iNH3
(integer that i is 1 to 4)
4. calcining
Ca(OH)2·2Zn(OH)2·2H2O=Ca (OH)2+2ZnO+4H2O
Or
Ca(OH)2·2Zn(OH)2·2H2O=CaO+2ZnO+5H2O
Specific process step
Step 1 extraction
Low-grade be mixed in a certain ratio containing zinc ore crude and prepared digestion agent after will be levigate is stirred leaching.Leaching
Proposing agent can be selected from：The mixed aqueous solution of ammonia and ammonium hydrogen carbonate；The mixed aqueous solution of ammonia and ammonium carbonate；Ammonia, ammonium hydrogen carbonate and carbon
The mixed aqueous solution of sour ammonium.
Total ammonia density and effective carbonate concentration in digestion agent are not particularly limited, and those skilled in the art can be according to original
The factors such as mine ingredient, grade, are selected in conjunction with actual needs.
In the preferred scheme, the mass concentration of total ammonia is 5%~15%, more preferable 6%~8% in digestion agent, preferably
Concentration range can reach sufficient extracting effect, and avoid excessive ammonia cause waste and environmental issue.
In the preferred scheme, the amount of effective carbonate is to subtract original in complexing zinc theory carbonate consumption in digestion agent
Increase by 0~500% on the basis of difference obtained by the carbonate amount that zinc carbonate is brought into material, effective carbonate in more preferable digestion agent
Amount be complexed zinc theory carbonate consumption subtract difference obtained by the carbonate amount that zinc carbonate in raw material is brought on the basis of increase
Add 50%-150%.Complexing zinc theory carbonate consumption, which refers to, is fully converted to ammine carbonate zinc institute for the Zn-ef ficiency in raw ore
The amount of the carbonate of consumption.Therefore, the molar concentration of effective carbonate may be calculated as in digestion agent：
CDigestion agent carbonate=(nThe total zinc of raw ore-nRaw ore zinc carbonate)×a/VDigestion agent
Wherein, CDigestion agent carbonateFor the molar concentration of carbonate effective in digestion agent, nThe total zinc of raw oreFor containing the Zn-ef ficiency in zinc ore crude
Substance amount, nRaw ore zinc carbonateFor the amount of the substance containing the zinc carbonate in zinc ore crude, VDigestion agentFor digestion agent volume, a is coefficient, a's
Value is 100%~600%, preferably 150%~250%.The mass concentration of carbonate can be changed according to molar concentration in digestion agent
It calculates.
The preferred effective carbonate concentration of digestion agent can be such that the zinc in raw ore leaches completely, and carbonate can be realized in work
Circulation in skill, and it is avoided that excessive carbonate causes stress subsequent technique processing.
The weight ratio of digestion agent and the powder containing zinc ore crude is not particularly limited, as long as zinc ingredient can be leached.It is preferred that
The weight ratio of digestion agent and the powder containing zinc ore crude is 3:1 to 5:1, satisfied extracting effect can be not only obtained, but also avoid the wave of digestion agent
Take.
The temperature of extraction is not particularly limited, as long as being leached the zinc ingredient in raw ore.It is preferred that at normal temperature into
Row extraction, such as extracted at 15~30 DEG C；It (such as 30~55 DEG C) can also be extracted at a temperature of slightly higher.It can also root
Suitable temperature is selected according to physical condition.
It is stirred after oxidation zinc ore crude is mixed with digestion agent, mixing time is not particularly limited, as long as making in raw ore
Zinc ingredient be leached, preferably mixing time be 1~4 hour, more preferable 1~2 hour.
In leaching process, the Zn-ef ficiency in raw ore be converted into zinc ammonium complex ion (the zinc ammino formed in leaching process from
Son is mainly zinc ammonium complex ions at different levels), into liquid phase.It is filtered, obtains after filtering containing zinc ammonium complex ion after extraction
Leachate.Leachate can be used for subsequent decarbonizing process.Zinc ammonium complex ion concentration in leachate is not particularly limited, but preferably
Zinc ammonium complex ion concentration (in terms of the quality of Zn-ef ficiency) in leachate is 10~25g/L, and the treatment effeciency of technique can be made optimal,
Good yield and purity are obtained in subsequent calcium zincates synthesis step, overall economic efficiency is best.If original leaching
The liquid of leaching is also optionally concentrated or is diluted not in preferred scope by zinc ammonium complex ion concentration in liquid, will be soaked
The zinc ammonium complex ion concentration in liquid is adjusted to preferred 10~25g/L range out.
Step 2 purification
Step 2 be optional step, it is necessary to when selection carry out step 2.Leachate is purified by known method,
Remove the impurity elements such as iron, manganese, lead, copper.A kind of illustrative purification method is that addition zinc powder replace and then filtered, thus
Heavy metal contaminants are removed, but other various well known purification methods also can be used.Purifying step helps to improve finished product
Purity.
Step 3 decarburization
In decarbonation process, calcium hydroxide and/or calcium oxide are added into the leachate containing zinc ammonium complex ion, will leach
Carbonate/bicarbonate in liquid switchs to calcium carbonate.If zinc ammonium complex ion excessive concentration in leachate, it is likely that send out simultaneously
Zinc ammonium complex ion-zinc ion-zinc hydroxide balanced sequence in raw leachate, a little zinc ingredient may be with hydroxide
The form and calcium carbonate of zinc are co-precipitated.
In decarbonation process, effective carbonate in the substantially matching leachate of the additive amount of calcium hydroxide and/or calcium oxide
Content, for example, the amount of the substance of calcium hydroxide and/or calcium oxide that decarbonation process is added is the object of effective carbonate in leachate
The 100% to 130% of the amount of matter, more preferable 100% to 110%.Calcium hydroxide and/or calcium oxide are appropriately added, is facilitated
Control process costs, it helps improve the purity and quality of finished product zinc product.
In decarbonation process, calcium hydroxide and/or calcium oxide are added into leachate, stirring is reacted, and solid is generated
Precipitating.The temperature of reaction is not particularly limited, and is particularly preferably reacted at normal temperature (such as 15~25 DEG C), on the one hand saves
On the other hand the energy also reduces environmental pollution caused by ammonia volatilization.Mixing time is not particularly limited, and is as long as obtaining precipitating
Can, preferably stir 1~2 hour.
It is filtered after stirring, obtains the first solid and the first filtrate.The main component of first solid is calcium carbonate, if
The concentration of zinc ammonium complex ion is higher in leachate, then some hydroxides with calcium carbonate co-precipitation are also likely to be present in the first solid
Zinc.First filtrate continues on for subsequent calcium zincates synthesis.Calcium carbonate in first solid can then be calcined to calcium oxide and two
Carbonoxide, realization recycle.
The synthesis of step 4 calcium zincates
Calcium hydroxide and/or calcium oxide is added in the first filtrate obtained to step 3, and stirring is reacted.Add in this step
The ratio between the amount of the substance of the calcium hydroxide and/or calcium oxide that enter and amount of substance of zinc ammonium complex ion in the first filtrate preferably 1~
1.2:2, more preferable 1~1.1:2.Reaction temperature is not particularly limited, and can be such as 15~90 DEG C, preferably 20~90 DEG C, into
Preferably 30~60 DEG C of one step；Or it is also preferred that 15~25 DEG C of reaction temperature, the temperature range have without heating, energy conservation and subtract
The advantages of few ammonia volatilization.Reaction can be filtered for 0.5~2 hour after (preferably 0.5~1 hour), without prolonged reaction
And ageing process.It is filtered, is obtained with calcium zincates the second solid as main component and the second filtrate after reaction.It can also be to
It is passed through carbon dioxide in second filtrate, using the second filtrate for being passed through carbon dioxide as digestion agent, is recycled for containing zinc ore crude
Extraction.
The rinsing of step 5 calcium zincates
Step 5 be optional step, it is necessary to when selection carry out step 5.In steps of 5, for based on calcium zincates
The second solid for wanting ingredient, adds water to be rinsed, and liquid-solid ratio is 5~10:1, rinsing times are 1-2 times.
Step 6 calcining
In this step, it takes the second solid to be calcined, decomposes calcium zincates.Calcination temperature can be 150~1050 DEG C,
It is preferred that 150~350 DEG C.Calcining obtained product is mixture, if calcination temperature is at 150~350 DEG C, calcined product is main
Ingredient is zinc oxide and calcium hydroxide；If calcined product contains zinc oxide, calcium hydroxide using higher calcination temperature
And/or calcium oxide.
The separation of step 7 calcium zinc
Water is insoluble in view of zinc oxide, and calcium hydroxide (or calcium oxide) is water-soluble or is dissolved in water after reacting with water, therefore
Water solubility using zinc oxide and calcium hydroxide (or calcium oxide) is poor, realizes zinc oxide and calcium hydroxide (or calcium oxide)
Separation.
In this step, calcined product step 6 obtained is mixed with water, is stirred, and filtering obtains third solid and third
Filtrate.The main component of third solid is zinc oxide, and the solute in third filtrate is mainly calcium hydroxide.Third solid is done
It is dry, obtain zinc oxide product.And for third filtrate, it can be passed through carbon dioxide to it and obtain precipitation of calcium carbonate, also can be recycled
Third filtrate supplies other purposes.
It is described in detail below in conjunction with embodiment of the embodiment to the disclosure, but those skilled in the art will
Understand, the following example is merely to illustrate the disclosure, and is not construed as the restriction to the scope of the present disclosure.It is not specified in embodiment
Actual conditions person carries out according to conventional conditions or manufacturer's recommended conditions.Reagents or instruments used without specified manufacturer,
Being can be with conventional products that are commercially available.
Embodiment 1
Yunnan somewhere zinc ore, Zn content 5.6%, raw ore oxygenation efficiency 96.3%, the zinc ingredient in the mine is based on zinc carbonate
Want existence form.
300 grams are taken containing zinc ore crude, is put into 900 milliliters of ammonia-ammonium bicarbonate mixed liquor (total ammonia mass concentration 10%, carbonate matter
Amount concentration 3%) in be stirred extraction, extraction temperature room temperature, mixing time is 2 hours, is then filtered, filtered liquid
Contain zinc (meter is worked as with zinc oxide) 1.632% in body, carbonate mass concentration 4.23% in liquid, increased portion is divided into raw ore
Zinc carbonate is brought into.According to inspection data, solvable zinc recovery is 90.79% in leaching process raw ore, and total zinc recovery is
87.43%.
The leachate containing zinc ammonium complex ion being obtained by filtration is subjected to purified treatment.
600 milliliters of purified leachates are taken, 14.55 grams of calcium oxide are added, for precipitating carbonate, after reaction 1 hour
It is filtered.
500 milliliters of filtered liquid is taken, synthesis of 2.45 grams of calcium hydroxides for calcium zincates is added, stirring carries out anti-
It answers, reaction is filtered after 1 hour, is obtained after filtering with calcium zincates solid as main component.
Calcium zincates solid is dried 2 hours at 105 DEG C, then is calcined 2 hours through 300 DEG C, calcium zincates are decomposed into oxygen
Change zinc and calcium hydroxide.
The water of 300 times of quality is added to zinc oxide and calcium hydroxide, stirs 1 hour, is then filtered, filtered oxygen
It is 2 hours dry at 105 DEG C to change zinc, analysis of testing, the content of zinc oxide is 99.73% in product.
Embodiment 2
Chongqing somewhere zinc ore, Zn content 4.7%, raw ore oxygenation efficiency 95.52%, the zinc ingredient in the mine is based on zinc silicate
Want existence form.
300 grams of oxidation zinc ore crudes are taken, 900 milliliters of ammonia-ammonium bicarbonate mixed liquor (total ammonia mass concentration 10%, carbonate are put into
Mass concentration 3%) in be stirred extraction, extraction temperature room temperature, mixing time is 2 hours, is then filtered, liquid after filtering
Zinc oxide 1.367%, carbonate mass concentration 3.54% in liquid are pressed in body, increased portion is divided into the zinc carbonate in raw ore and brings into.
According to inspection data, solvable zinc recovery is 91.35% in leaching process raw ore, and total zinc recovery is 87.26%.
The leachate containing zinc ammonium complex ion being obtained by filtration is subjected to purified treatment.
600 milliliters of purified leachates are taken, 12.18 grams of calcium oxide are added, for precipitating carbonate, after reaction 1 hour
It is filtered.
500 milliliters of filtered liquid is taken, synthesis of 2 grams of calcium hydroxides for calcium zincates is added, stirring is reacted, instead
It is filtered, obtains after filtering with calcium zincates solid as main component after answering 1 hour.
Calcium zincates solid is dried 2 hours at 105 DEG C, then is calcined 2 hours through 300 DEG C, calcium zincates are decomposed into oxygen
Change zinc and calcium hydroxide.
The water of 300 times of quality is added to zinc oxide and calcium hydroxide, stirs 1 hour, is then filtered, filtered oxygen
Change zinc dry analysis of testing in 2 hours at 105 DEG C, the content of zinc oxide is 99.57% in product.
The presently disclosed embodiments is described above, above description is exemplary, and non-exclusive, and
It is not limited to disclosed each embodiment.Without departing from the scope and spirit of illustrated each embodiment, for this skill
Many modifications and changes are obvious for the those of ordinary skill in art field.The selection of term used herein, purport
In principle, the practical application or to the technological improvement in market for best explaining each embodiment, or make the art its
Its those of ordinary skill can understand each embodiment disclosed herein.
Claims (8)
1. a kind of method using the production zinc oxide containing zinc ore crude, which is characterized in that described to produce zinc oxide using containing zinc ore crude
Method include the following steps：
Leach step：Being mixed after will be levigate containing zinc ore crude and digestion agent, then filters, obtains leachate, wherein is described
Digestion agent is the mixed aqueous solution or ammonia of ammonia and ammonium hydrogen carbonate and mixed aqueous solution or ammonia, the ammonium hydrogen carbonate and carbonic acid of ammonium carbonate
The mixed aqueous solution of ammonium；
Optionally, leachate obtained in the leach step is purified；
Decarbonation process：Calcium oxide and/or calcium hydroxide are added into the leachate, then stirring filters, obtains the first solid
With the first filtrate；
Calcium zincates synthesis step：Calcium hydroxide and/or calcium oxide is added to first filtrate, then stirring is filtered, obtain the
Two solids and the second filtrate；
Optionally, second solid is rinsed with water；
Calcining step：Second solid is taken to be calcined, calcination temperature is 150~1050 DEG C, preferably 150~350 DEG C；
Calcium zinc separating step：The calcined product that the calcining step obtains is mixed with water, is stirred, filtering obtains third solid
It is with third filtrate, the third solid is dry, obtain zinc oxide product.
2. the method according to claim 1 using the production zinc oxide containing zinc ore crude, which is characterized in that
The mass concentration of total ammonia in the digestion agent is 5%~15%, effective carbonate in the digestion agent it is mole dense
Degree is：
CDigestion agent carbonate=(nThe total zinc of raw ore-nRaw ore zinc carbonate)×a/VDigestion agent
Wherein,
CDigestion agent carbonateFor the molar concentration of effective carbonate in the digestion agent,
nThe total zinc of raw oreFor the amount of the substance containing the Zn-ef ficiency in zinc ore crude,
nRaw ore zinc carbonateFor the amount of the substance containing the zinc carbonate in zinc ore crude,
VDigestion agentFor the volume of the digestion agent,
The value range of a is 100%~600%, preferably 150%~250%.
3. the method according to claim 1 or 2 using the production zinc oxide containing zinc ore crude, which is characterized in that in the leaching
It mentions in the leachate that step obtains, the concentration (in terms of the quality of Zn-ef ficiency) of zinc ammonium complex ion is 10~25g/L.
4. the method according to any one of claims 1 to 3 using the production zinc oxide containing zinc ore crude, which is characterized in that
The amount of the substance of the calcium oxide and/or calcium hydroxide that are added in the decarbonation process is effective carbonate in the leachate
The 100% to 130% of the amount of substance, preferably 100% to 110%.
5. the method according to any one of claims 1 to 4 using the production zinc oxide containing zinc ore crude, which is characterized in that
In the calcium zincates synthesis step, the amount and first of the substance of calcium hydroxide and/or calcium oxide is added into first filtrate
The ratio between amount of substance of zinc ammonium complex ion is 1~1.2 in filtrate:2, preferably 1~1.1:2.
6. the method according to any one of claims 1 to 5 using the production zinc oxide containing zinc ore crude, which is characterized in that
Second filtrate that the calcium zincates synthesis step obtains is passed through carbon dioxide, and the second filtrate for being passed through carbon dioxide is made
For digestion agent, recycle for the extraction containing zinc ore crude.
7. the method according to any one of claims 1 to 6 using the production zinc oxide containing zinc ore crude, which is characterized in that institute
The reaction temperature for stating calcium zincates synthesis step is 15~90 DEG C, preferably 30~60 DEG C, or preferably 15~25 DEG C.
8. the method according to any one of claims 1 to 7 using the production zinc oxide containing zinc ore crude, which is characterized in that
In the calcium zinc separating step, it is passed through carbon dioxide to the third filtrate, obtains precipitation of calcium carbonate.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810817318.7A CN108862371A (en) | 2018-07-24 | 2018-07-24 | A method of zinc oxide is produced using containing zinc ore crude |
| CN201980001299.3A CN110896643B (en) | 2018-07-24 | 2019-04-24 | Method for producing zinc-containing compound or zinc oxide from zinc-containing raw ore through intermediate step of calcium zincate synthesis |
| PCT/CN2019/084003 WO2020019777A1 (en) | 2018-07-24 | 2019-04-24 | Method for producing zinc-containing complex or zinc oxide using zinc-containing raw ore via intermediate step for synthesis of calcium zincate |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810817318.7A CN108862371A (en) | 2018-07-24 | 2018-07-24 | A method of zinc oxide is produced using containing zinc ore crude |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020019834A1 (en) * | 2018-07-24 | 2020-01-30 | 重庆东群科技有限公司 | Mineral processing method for low-grade zinc-containing raw ore |
| WO2020019777A1 (en) * | 2018-07-24 | 2020-01-30 | 重庆东群科技有限公司 | Method for producing zinc-containing complex or zinc oxide using zinc-containing raw ore via intermediate step for synthesis of calcium zincate |
-
2018
- 2018-07-24 CN CN201810817318.7A patent/CN108862371A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020019834A1 (en) * | 2018-07-24 | 2020-01-30 | 重庆东群科技有限公司 | Mineral processing method for low-grade zinc-containing raw ore |
| WO2020019777A1 (en) * | 2018-07-24 | 2020-01-30 | 重庆东群科技有限公司 | Method for producing zinc-containing complex or zinc oxide using zinc-containing raw ore via intermediate step for synthesis of calcium zincate |
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