CN107285371A - The method for preparing feed grade zinc oxide using blast furnace dedusting ash and zinc waste residue - Google Patents
The method for preparing feed grade zinc oxide using blast furnace dedusting ash and zinc waste residue Download PDFInfo
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- CN107285371A CN107285371A CN201710601713.7A CN201710601713A CN107285371A CN 107285371 A CN107285371 A CN 107285371A CN 201710601713 A CN201710601713 A CN 201710601713A CN 107285371 A CN107285371 A CN 107285371A
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- 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
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B19/00—Obtaining zinc or zinc oxide
- C22B19/34—Obtaining zinc oxide
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
- C22B7/001—Dry processes
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
- C22B7/02—Working-up flue dust
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
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Abstract
The invention discloses a kind of method that utilization blast furnace dedusting ash and zinc waste residue prepare feed grade zinc oxide, following steps are specifically included：Vaporization at high temperature production secondary zinc oxide, neutral leaching, iron removal by oxidation, chemical combination generation basic zinc carbonate, rinsing are except steps such as water-soluble salt, calcining production feed grade zinc oxides.The present invention utilizes blast furnace dedusting ash and non-ferrous metal waste residue production feed grade zinc oxide, on the premise of three waste discharge is not increased, the valuable metals such as zinc, indium, tin, cadmium, lead, bismuth, iron fully in recovery raw material, and also using Rotary Kiln high-temperature flue gas byproduct steam, for generating electricity or meeting project construction steam needs, with good economic benefit.
Description
Technical field
The present invention relates to zinc oxide production technical field, particularly a kind of utilization blast furnace waste residue prepares feed grade zinc oxide
Method.
Background technology
Zinc oxide is a kind of conventional chemical addition agent, be mainly used as rubber, coating, printing and dyeing, feed, medicine, chemical industry and
The raw material of the industry such as ceramics.When zinc oxide is applied to feed addictive, added generally in the form of feed grade zinc oxide, feed grade
Zinc oxide is a kind of white or faint yellow hexagon fine-powder, with tasteless, nontoxic, matter is fine and smooth, micro- Zn content is high,
The features such as product is fine, its biology utilization rate is high, applies in feed, has growth promotion and antibacterial action to animal.
However, relative to the zinc oxide of other kinds, feed grade zinc oxide has particular/special requirement, production technology in index
It is general to there are dry and wet to produce two ways.Wherein, dry method includes two kinds of direct method and indirect method again；Direct method is with water chestnut zinc
Ore deposit, zinc sulfide ore, zincblende and secondary zinc oxide ore deposit add reducing agent, at high temperature dinectly bruning, the zinc of generation as raw material
Steam and hot air oxidation generation zinc oxide；Indirect method is that zinc ore first refined into zinc ingot metal, then uses production of zinc ingot zinc oxide,
But either direct method or indirect method production feed grade zinc oxide do not reach sanitary index requirement.Wet method is in zinc solution
It is middle to add different bases or salt obtains zinc hydroxide or basic zinc carbonate, then after rinsing, drying, then high temperature thermal decomposition
Obtain finished product；Such a mode is with low cost, is widely applied.
Non-renewable due to mineral resources, zinc ore reserves are increasingly reduced, and constrain increase and the demand of zinc yield.
In addition, substantial amounts of non-ferrous metal waste residue can be produced in the smelting process of non-ferrous metal, wherein the metal containing different shape, by
It is relatively low in its content, therefore do not recycled sufficiently always, cause huge waste.If can be from blast furnace waste residue
Refine and prepare the feed grade zinc oxide used in production feed, not only can be recycled non-ferrous metal waste residue, simultaneously
Also the yield of feed grade zinc oxide is substantially increased.
One earlier patent application CN201210280268.6 extracts the side of zinc in disclosing a kind of waste residue from non-ferrous metal
Method, including pyrometallurgical smelting, acidleach, the heavy step such as zinc and reduction melting, can realize new recycling, it is to avoid valuable metal
Pollution to environment.But the zinc that this method is produced, yield is less, and precision is relatively low, it is impossible to meet subsequent production feed
The requirement of level zinc oxide.
The content of the invention
The technical problem to be solved in the invention is to provide one kind and prepares feed grade oxygen using blast furnace dedusting ash and zinc waste residue
Change the method for zinc, can not only produce the feed grade zinc oxide of feed, but also can by-product lead concentrate, bismuth concentrate, Iron concentrate,
The metals such as thick cadmium, thick prosperous and thick indium；Blast furnace waste residue is set to be fully recycled.
In order to solve the above technical problems, the technical solution used in the present invention is as follows.
The method for preparing feed grade zinc oxide using blast furnace dedusting ash and zinc waste residue, specifically includes following steps：
1）Dedusting ash is rinsed, the dedusting ash filter cake of gained after rinsing is sent into vaporization at high temperature together with zinc waste residue and sedimentation reclaimed materials
Kiln, while being passed through the air for being mixed with coke powder into vaporization at high temperature kiln, dedusting ash, zinc waste residue, sedimentation reclaimed materials and coke powder are added
Part by weight be 640:126:24:31；
2）The flue gas that vaporization at high temperature kiln is produced is settled through bag collection must settle reclaimed materials, and the flue gas after sedimentation passes through waste heat boiler
Heat is reclaimed, the flue gas after heat is reclaimed and enters the mechanism acquisition secondary zinc oxide raw material that gathers dust；
3）To step 2）Gained secondary zinc oxide raw material is rinsed, and press filtration obtains secondary zinc oxide filter cake, during secondary zinc oxide filter cake is carried out
Property leach；
4）Step 3）The neutral leachate that neutrality is leached, adds hydrogen peroxide or potassium permanganate carries out iron removal by oxidation, and hydrogen peroxide is added
Part by weight be dedusting ash weight 1/20；Zinc powder is added after reaction completely, the part by weight that zinc powder is added is dedusting ash weight
The 1/800 of amount；Divalent cadmium ion in neutral leachate is cemented out, carried out except cadmium obtains sulfuric acid zinc purification fluid；
5）Soda ash is added into sulfuric acid zinc purification fluid and carries out synthetic reaction, synthetic reaction completes addition sodium carbonate in backward solution and entered
Row combination reaction obtains basic zinc carbonate press filtration filter cake；The part by weight that soda ash is added is the 1/4 of dedusting ash weight；The carbonic acid
The part by weight that sodium is added is the 1/320 of dedusting ash weight；
6）Basic zinc carbonate press filtration filter cake is rinsed, calcining kiln is then sent into and is calcined, generate zinc oxide；
7）Tutty after calcining obtains feed grade zinc oxide product after supercooling, crushing and packaging.
The method that above-mentioned utilization blast furnace dedusting ash and zinc waste residue prepare feed grade zinc oxide, step 3）Described neutral leaching
It is to leach the zinc in secondary zinc oxide filter cake using acid zinc sulfate extract to generate neutral leachate, the pH value for leaching terminal is
5.0~5.2；The part by weight that the extract is added is the 1/320 of dedusting ash weight.
The method that above-mentioned utilization blast furnace dedusting ash and zinc waste residue prepare feed grade zinc oxide, step 1）High temperature Rotary Kiln is
The zinc in raw material, lead, indium, tin, cadmium, bismuth are reduced into elemental metals, elemental metals and flue gas at a high temperature of 1200 DEG C
The volatile hydrotrope and a small amount of flue dust impurity in oxygen reaction generation metal oxide, metal oxide dirt and raw material is with dust
Remove.
The method that above-mentioned utilization blast furnace dedusting ash and zinc waste residue prepare feed grade zinc oxide, step 1）Vaporization at high temperature kiln is produced
Clinker in contain fe and ferroso-ferric oxide, after slag ball milling is crushed, using magnetic force by the fe in clinker and
Ferroso-ferric oxide is extracted, and produces iron powder, and clout is magnetic separation mud.
The method that above-mentioned utilization blast furnace dedusting ash and zinc waste residue prepare feed grade zinc oxide, step 2）Cigarette after the sedimentation
Temperature degree be 520 ~ 580 DEG C, into waste heat boiler after produce 450 DEG C, 3.5MPa superheated steam.
The method that above-mentioned utilization blast furnace dedusting ash and zinc waste residue prepare feed grade zinc oxide, step 2）It is described gather dust after it is useless
In desulfurization feeding secondary zinc oxide slurry pool, the sulfur dioxide reaction generation in the zinc oxide and flue gas in secondary zinc oxide solution is sub-
Zinc sulfate, zinc sulfite and the oxygen reaction generation zinc sulfate in air, are completed without desuifurized discharge.
The method that above-mentioned utilization blast furnace dedusting ash and zinc waste residue prepare feed grade zinc oxide, step 3）Secondary zinc oxide is rinsed
Solution it is purified, evaporation, crystallization after produce industrial chlorinations sodium.
The method that above-mentioned utilization blast furnace dedusting ash and zinc waste residue prepare feed grade zinc oxide, to step 3）During neutrality is leached
Property leached mud in add sulfuric acid and water, generate acidic sulphate solution, the valuable metal in raw material is leached, leaching terminal sulfur-bearing
90 ~ 120g/L of acid, output lead concentrate press filtration filter cake.
The method that above-mentioned utilization blast furnace dedusting ash and zinc waste residue prepare feed grade zinc oxide, to step 3）Output lead concentrate pressure
Filter addition zinc powder in the solution of filter cake and enter line replacement acquisition bismuth concentrate；Extract, zinc metal sheet are added into the solution of output bismuth concentrate
Extraction and displacement is carried out with hydrochloric acid, thick indium and thick tin are obtained respectively.
The method that above-mentioned utilization blast furnace dedusting ash and zinc waste residue prepare feed grade zinc oxide, to step 5）In filter out alkali formula carbon
The combined solution of sour zinc is evaporated crystallization production sulfuric acid monohydrate sodium and condensed water.
As a result of above technical scheme, the invention technological progress is as follows.
The present invention is not increasing three waste discharge using blast furnace dedusting ash and non-ferrous metal waste residue production feed grade zinc oxide
Under the premise of, fully reclaim the valuable metal in raw material, and also using Rotary Kiln high-temperature flue gas byproduct steam, for generating electricity or
Project construction steam needs are met, with good economic benefit.
Brief description of the drawings
Fig. 1 is flow chart of the invention；
Fig. 2 enters kiln material and component content table year for embodiment of the present invention；
Fig. 3 is the material balance figure of embodiment of the present invention；
Fig. 4 is the year production cost sheet of embodiment of the present invention；
Fig. 5 is the annual value of production table of embodiment of the present invention.
Embodiment
Below in conjunction with specific embodiment, the present invention will be described in further detail.
The present invention is produced applied to DN3500*52000 vaporization at high temperature kiln in the project of feed grade zinc oxide, and entering kiln material is
Blast furnace dedusting ash, zinc waste residue, project waste residue and coke powder, product be feed grade zinc oxide, thick indium, thick tin, thick cadmium, lead concentrate,
Bismuth concentrate, iron powder, magnetic separation mud, volatile matter, sodium chloride and sodium sulphate.Feed grade oxygen is prepared using blast furnace dedusting ash and zinc waste residue
Change the flow of zinc as shown in figure 1, specifically including following steps.
1）Dedusting ash is rinsed, the dedusting ash filter cake of gained after rinsing is sent into high temperature together with zinc waste residue and sedimentation reclaimed materials
Rotary Kiln, while the air for being mixed with coke powder is passed through into vaporization at high temperature kiln, dedusting ash, zinc waste residue, sedimentation reclaimed materials and coke powder
The part by weight of addition is 640:126:24:31.
In this step, enter kiln material and component content year as shown in Fig. 2 dedusting ash, zinc waste residue, sedimentation reclaimed materials and Jiao
Powder add weight be respectively：160000 tons, 34000 tons, 6000 tons, 7750 tons.
The rinsing of dedusting ash is carried out using hot water, needs to carry out rinse cycle twice in the present embodiment.Raw material enters high temperature
After Rotary Kiln, at a high temperature of 1200 DEG C with coke powder heat generation carbon monoxide reacted, by the zinc in raw material, lead, indium,
Tin, cadmium, bismuth are reduced into elemental metals, elemental metals and the oxygen reaction generation metal oxide in flue gas, and chemical equation is as follows；
The volatile hydrotrope and a small amount of flue dust impurity in metal oxide dirt and raw material are removed with dust.
Contain fe and ferroso-ferric oxide in the clinker that vaporization at high temperature kiln is produced, will using magnetic force after slag ball milling is crushed
Fe and ferroso-ferric oxide in clinker are extracted, and produce iron powder, and clout is magnetic separation mud.
2）The flue gas that vaporization at high temperature kiln is produced is settled through bag collection must settle reclaimed materials, and the flue gas after sedimentation passes through waste heat
Boiler reclaims heat, reclaims the flue gas after heat and enters the mechanism acquisition secondary zinc oxide raw material that gathers dust.
Flue-gas temperature after sedimentation is 520 ~ 580 DEG C, into waste heat boiler after produce 450 DEG C, 3.5MPa superheated steam,
For generating electricity and meeting project construction steam needs.
In zinc oxide and flue gas in desulfurization in waste gas feeding secondary zinc oxide slurry pool after gathering dust, secondary zinc oxide solution
Sulfur dioxide reaction generation zinc sulfite, zinc sulfite and the oxygen reaction generation zinc sulfate in air, chemical equation are as follows；
So that flue gas qualified discharge, is completed without desuifurized discharge.
3）To step 2）Gained secondary zinc oxide raw material is rinsed, and press filtration obtains secondary zinc oxide filter cake, during secondary zinc oxide filter cake is carried out
Property leach.The solution that has rinsed secondary zinc oxide is purified, evaporation, crystallization, crystal profit new packing obtains industrial chlorinations sodium product.
Neutral leach described in this step is to leach the zinc in secondary zinc oxide filter cake using acid zinc sulfate extract to give birth to
Into zinc sulfate solution, have simultaneouslyPlasma dissolves in, and chemical equation is as follows；Leach the pH value of terminal
For 5.0 ~ 5.2；The part by weight that the extract is added is the 1/320 of dedusting ash weight.In the present embodiment, the year of extract adds
Enter amount for 627 tons.
Sulfuric acid and water are added in the neutral leaching residue leached to this step through neutrality, acidic sulphate solution is generated, makes original
Valuable metal in material is leached, and chemical equation is as follows；Leach terminal 90 ~ 120g/L of sulfur acid, output lead concentrate press filtration filter cake.
Zinc powder is added into the solution of output lead concentrate press filtration filter cake, by solutionSponge bismuth is replaced as with iron,
Remove in solution, chemical equation is as follows；Obtain bismuth concentrate.
Extract is added into the solution of output bismuth concentrate, by solutionExtract and, then with hydrochloric acid by richness
In extractantBack extraction comes out；Added into strip liquor after alkali neutralization, the equivalent of terminal acidity 1 ~ 1.5；Then plus
Enter zinc metal sheet by solutionCement out, generate scruff, make in solutionConcentration reaches production indium requirement；
Except in scruff contain simple substance tin and indium, by except in scruff add extract enter line replacement, then add hydrochloric acid leached,
Indium is dissolved, pure continuous tin is obtained；By except in the solution after tin add zinc metal sheet displace sponge indium；So as to obtain thick tin and thick indium.
4）To step 3）Hydrogen peroxide is added in the neutral leachate that neutrality is leached or potassium permanganate carries out iron removal by oxidation, dioxygen
The part by weight that water is added is the 1/20 of dedusting ash weight, in the present embodiment, and the amount for adding hydrogen peroxide year is 1662 tons.Neutrality leaching
Go out in liquidIt is added into hydrogen peroxide oxidation generation,It is hydrolyzed toPrecipitation, chemical equation is such as
Under；Remove in solution。
Zinc powder is added in the solution for removing iron ion, the part by weight that zinc powder is added is the 1/800 of dedusting ash weight；By neutrality
Divalent cadmium ion in leachate is cemented out, and chemical equation is as follows；Carry out except cadmium obtains sulfuric acid zinc purification fluid.
Contain a small amount of simple substance zinc by replacing the cadmium slag obtained, dilution heat of sulfuric acid has just been added into cadmium slag makes simple substance zinc molten
Solution, obtains purer cotton cadmium.
5）Soda ash is added into sulfuric acid zinc purification fluid and carries out synthetic reaction, synthetic reaction completes to add carbonic acid in backward solution
Sodium carries out combination reaction and obtains basic zinc carbonate press filtration filter cake, and chemical equation is as follows；The part by weight that soda ash is added is dedusting
The 1/4 of grey weight；The part by weight that the sodium carbonate is added is the 1/320 of dedusting ash weight.
The combined solution of basic zinc carbonate is filtered out, crystallization production sulfuric acid monohydrate sodium and condensed water is evaporated.
6）Basic zinc carbonate press filtration filter cake is rinsed, calcining kiln is then sent into and is calcined, generate zinc oxide.
7）Tutty after calcining obtains feed grade zinc oxide product after supercooling, crushing and packaging.
The material balance data of the present embodiment is as shown in Figure 3.
This project prepares feed grade zinc oxide using blast furnace dedusting ash and zinc waste residue, and its year production cost is as shown in figure 4, about
For 362,780,000 yuan, annual value of production as shown in figure 5, about 600,180,000 yuan, production cycle average annual value-added tax is economical up to 39,550,000 yuan
Remarkable benefit.
Claims (10)
1. the method for preparing feed grade zinc oxide using blast furnace dedusting ash and zinc waste residue, it is characterised in that specifically include following step
Suddenly：
1）Dedusting ash is rinsed, the dedusting ash filter cake of gained after rinsing is sent into vaporization at high temperature together with zinc waste residue and sedimentation reclaimed materials
Kiln, while being passed through the air for being mixed with coke powder into vaporization at high temperature kiln, dedusting ash, zinc waste residue, sedimentation reclaimed materials and coke powder are added
Part by weight be 640:126:24:31；
2）The flue gas that vaporization at high temperature kiln is produced is settled through bag collection must settle reclaimed materials, and the flue gas after sedimentation passes through waste heat boiler
Heat is reclaimed, the flue gas after heat is reclaimed and enters the mechanism acquisition secondary zinc oxide raw material that gathers dust；
3）To step 2）Gained secondary zinc oxide raw material is rinsed, and press filtration obtains secondary zinc oxide filter cake, during secondary zinc oxide filter cake is carried out
Property leach；
4）Step 3）The neutral leachate that neutrality is leached, adds hydrogen peroxide or potassium permanganate carries out iron removal by oxidation, and hydrogen peroxide is added
Part by weight be dedusting ash weight 1/20；Zinc powder is added after reaction completely, the part by weight that zinc powder is added is dedusting ash weight
The 1/800 of amount；Divalent cadmium ion in neutral leachate is cemented out, carried out except cadmium obtains sulfuric acid zinc purification fluid；
5）Soda ash is added into sulfuric acid zinc purification fluid and carries out synthetic reaction, synthetic reaction completes addition sodium carbonate in backward solution and entered
Row combination reaction obtains basic zinc carbonate press filtration filter cake；The part by weight that soda ash is added is the 1/4 of dedusting ash weight；The carbonic acid
The part by weight that sodium is added is the 1/320 of dedusting ash weight；
6）Basic zinc carbonate press filtration filter cake is rinsed, calcining kiln is then sent into and is calcined, generate zinc oxide；
7）Tutty after calcining obtains feed grade zinc oxide product after supercooling, crushing and packaging.
2. the method that utilization blast furnace dedusting ash according to claim 1 and zinc waste residue prepare feed grade zinc oxide, its feature
It is, step 3）Described neutral leach is to be leached the zinc in secondary zinc oxide filter cake in generation using acid zinc sulfate extract
Property leachate, leach terminal pH value be 5.0 ~ 5.2；The part by weight that the extract is added is the 1/320 of dedusting ash weight.
3. the method that utilization blast furnace dedusting ash according to claim 1 and zinc waste residue prepare feed grade zinc oxide, its feature
It is, step 1）High temperature Rotary Kiln is that the zinc in raw material, lead, indium, tin, cadmium, bismuth are reduced into list at a high temperature of 1200 DEG C
Volatile water in matter metal, elemental metals and the oxygen reaction generation metal oxide in flue gas, metal oxide dirt and raw material
Molten thing and a small amount of flue dust impurity are removed with dust.
4. the method that utilization blast furnace dedusting ash according to claim 3 and zinc waste residue prepare feed grade zinc oxide, its feature
It is, step 1）Contain fe and ferroso-ferric oxide in the clinker that vaporization at high temperature kiln is produced, after slag ball milling is crushed, utilize
Magnetic force extracts the fe and ferroso-ferric oxide in clinker, produces iron powder, and clout is magnetic separation mud.
5. the method that utilization blast furnace dedusting ash according to claim 1 and zinc waste residue prepare feed grade zinc oxide, its feature
It is, step 2）Flue-gas temperature after the sedimentation is 520 ~ 580 DEG C, into waste heat boiler after produce 450 DEG C, 3.5MPa mistake
Vapours.
6. the method that utilization blast furnace dedusting ash according to claim 5 and zinc waste residue prepare feed grade zinc oxide, its feature
It is, step 2）It is described gather dust after exhuast gas desulfurization feeding secondary zinc oxide slurry pool in, zinc oxide in secondary zinc oxide solution with
Sulfur dioxide reaction generation zinc sulfite in flue gas, zinc sulfite and the oxygen reaction generation zinc sulfate in air, complete nothing
Desuifurized discharge.
7. the method that utilization blast furnace dedusting ash according to claim 1 and zinc waste residue prepare feed grade zinc oxide, its feature
It is, step 3）The solution that has rinsed secondary zinc oxide is purified, evaporation, produce industrial chlorinations sodium after crystallization.
8. the method that utilization blast furnace dedusting ash according to claim 7 and zinc waste residue prepare feed grade zinc oxide, its feature
It is, to step 3）Sulfuric acid and water are added in the neutral leaching residue that neutrality is leached, acidic sulphate solution is generated, makes in raw material
Valuable metal is leached, and leaches terminal 90 ~ 120g/L of sulfur acid, output lead concentrate press filtration filter cake.
9. the method that utilization blast furnace dedusting ash according to claim 8 and zinc waste residue prepare feed grade zinc oxide, its feature
It is, to step 3）Zinc powder is added in the solution of output lead concentrate press filtration filter cake and enters line replacement acquisition bismuth concentrate；To output bismuth essence
Extract, zinc metal sheet and hydrochloric acid are added in the solution of ore deposit and carries out extraction and displacement, thick indium and thick tin are obtained respectively.
10. the method that utilization blast furnace dedusting ash according to claim 1 and zinc waste residue prepare feed grade zinc oxide, its feature
It is, to step 5）In filter out the combined solution of basic zinc carbonate and be evaporated crystallization production sulfuric acid monohydrate sodium and condensed water.
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| CN109022798A (en) * | 2018-08-27 | 2018-12-18 | 浙江特力再生资源有限公司 | The method that recycling prepares basic zinc carbonate from discarded Zinc-containing anticorrosion paint |
| CN109338096A (en) * | 2018-11-21 | 2019-02-15 | 桂阳银龙科技有限责任公司 | Process for producing zinc calcine by using rotary kiln |
| CN110129551A (en) * | 2019-06-20 | 2019-08-16 | 桂阳县皓钰新材料有限公司 | The method for preparing high-grade zinc oxide and feed grade zinc oxide simultaneously using rotary kiln |
| CN110451556A (en) * | 2019-08-22 | 2019-11-15 | 李道斌 | A kind of production technology of secondary zinc oxide, zinc sulfate and nano zine oxide |
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| CN110724831A (en) * | 2019-10-31 | 2020-01-24 | 重庆赛迪热工环保工程技术有限公司 | Carbon circulating system and method for producing zinc oxide by industrially recycling zinc |
| CN110917876A (en) * | 2019-11-15 | 2020-03-27 | 湖南环达环保有限公司 | Regeneration method of zinc oxide desulfurizer |
| CN111020214A (en) * | 2019-11-04 | 2020-04-17 | 石棉县东顺锌业有限责任公司 | Method for producing zinc-containing material by using blast furnace dust |
| CN111573711A (en) * | 2020-05-12 | 2020-08-25 | 张家港凯铭锌业有限公司 | Preparation method of zinc oxide |
| CN112279294A (en) * | 2020-10-29 | 2021-01-29 | 福建冠鑫新材料有限公司 | Production method of zinc oxide |
| CN113337713A (en) * | 2021-05-11 | 2021-09-03 | 湖南博一环保科技有限公司 | Method for recovering zinc, lead, indium, cadmium and bismuth from zinc-containing wastewater |
| CN114262796A (en) * | 2021-12-27 | 2022-04-01 | 灵武市恒业有色金属冶化有限公司 | Preparation process for producing zinc sulfate by using waste battery electrolyte |
| CN117926024A (en) * | 2024-03-25 | 2024-04-26 | 清华大学 | Process for producing electrodeposited zinc by leaching zinc-containing paint slag in sulfuric acid |
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