CN100483843C - Environment protection using method for waste Ni-Cd battery - Google Patents
Environment protection using method for waste Ni-Cd battery Download PDFInfo
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- CN100483843C CN100483843C CNB2006100971491A CN200610097149A CN100483843C CN 100483843 C CN100483843 C CN 100483843C CN B2006100971491 A CNB2006100971491 A CN B2006100971491A CN 200610097149 A CN200610097149 A CN 200610097149A CN 100483843 C CN100483843 C CN 100483843C
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- cadmium
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- carbonate
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/84—Recycling of batteries or fuel cells
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- Manufacture And Refinement Of Metals (AREA)
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Abstract
The invention is a waste Ni-Cd battery environmental-protection utilizing method, firstly removing the cases of waste batteries and baking, adding different reactants in raw materials, and separating different resultants in different reacting stages, according to different chemical properties of different raw metal salts, different states of resultants, different reacting conditions and making into products. And its advantage is that it can recycle rare nickel and cadmium from waste Ni-Cd batteries, and in the production course, there is no environmental pollution. And it has higher social and economic benefits.
Description
Technical field
The present invention relates to the method that the old metal environmental protection is reclaimed, particularly a kind of environmental protection recoverying and utilizing method that is used for the waste Ni-Cd battery NI-G.
Background technology
The environmental pollution that ever-increasing waste Ni-Cd battery caused is more and more serious, and pollution problem how to handle waste Ni-Cd battery well has obtained the great attention of the whole society.The processing of waste Ni-Cd battery at present mainly is to adopt pyrogenic process (as high-temperature calcination) to smelt, to reclaim the nickel product, because cadmium can not obtain fine utilization, still environment is caused serious pollution threat in smelting process, cadmium also can cause the toxicity injury to human body in smelting process simultaneously.
Summary of the invention
The objective of the invention is provides a kind of environmental protection that has the waste Ni-Cd battery of environmental protection and economy value concurrently to utilize method at the deficiency of present pyrometallurgical smelting processing waste Ni-Cd battery.
The technical scheme that realizes above-mentioned purpose is as follows:
The environmental protection of waste Ni-Cd battery utilizes method, comprises the steps:
A, waste Ni-Cd battery is shelled the back at 450-600 degree roasting temperatures 1-3 hours, make organic carbon wherein, the NI-G compound is converted into corresponding oxide, be cooled to room temperature, positive/negative plate is taken out the back reclaim as the old metal alloy, and the remaining NI-G hopcalite that contains is worn into the recovery raw material with colloid mill with the metal shell of getting rid of;
B, reclaiming raw material adding sulfuric acid reaction, when the pH value of reaction solution reach 2.5-to 3.5 the time, in solution, add an amount of hydrogen peroxide and make and reclaim in the raw material not that the ferrous ion of complete oxidation is oxidized to ferric ion and oxydrolysis generates the ferric subsulfate precipitation, mixed solution is filtered;
C feeds hydrogen sulfide in the filtrate after the b step, makes cadmium ion generate the sulfide-cadmium precipitation that is insoluble in diluted acid, and c feeds hydrogen sulfide in the filtrate after the b step, makes cadmium ion generate the sulfide-cadmium precipitation that is insoluble in diluted acid, mixed solution is filtered again;
D, the filter residue cadmium sulfide after filtering in the c step fully is oxidized to cadmium sulfate through air, adds sodium carbonate again and generates the cadmium carbonate precipitation, and the separating, washing drying obtains the cadmium carbonate product after filtration again;
E adds sodium carbonate and generates the nickelous carbonate precipitation in the filtrate filtered in the c step, obtain the nickelous carbonate product after separating drying after filtration.
Further, in aforesaid b step, reclaim dissolving, the reaction that raw material adds behind the sulfuric acid and bubbling air reclaims raw material with promotion.
In addition, generate the nickelous carbonate post precipitation in the aforementioned e step, add sulfuric acid reaction again and generate nickelous sulfate, handle to obtain the nickelous sulfate product again through routine.
The main chemical reactions equation that aforementioned techniques scheme and technical measures thereof relate to is as follows:
Advantage of the present invention is the particularly cadmium recycling of NI-G of will giving up, and the recovery rate of cadmium can reach more than 99%, and non-environmental-pollution in the production process, has higher society and economy benefit.
Embodiment
The metal shell of getting rid of reclaims (being alloy as smelting again) as the old metal alloy, and the remaining NI-G hopcalite that contains is worn into the recovery raw material with colloid mill; Reclaiming raw material adding sulfuric acid reaction, and bubbling air is to promote to reclaim dissolving, the reaction of raw material, when the pH value of reaction solution reaches 3, in solution, add an amount of hydrogen peroxide and make and reclaim in the raw material not that the ferrous ion of complete oxidation is oxidized to ferric ion and oxydrolysis generates the ferric subsulfate precipitation, mixed solution is filtered; In filtrate, feed hydrogen sulfide, make cadmium ion generate the sulfide-cadmium precipitation that is insoluble in diluted acid, again mixed solution is filtered; Filter residue cadmium sulfide after will filtering again fully is oxidized to cadmium sulfate through air, adds sodium carbonate again and generates the cadmium carbonate precipitation, and the separating, washing drying obtains the cadmium carbonate product after filtration again; Add sodium carbonate in the filtrate of the nickel sulfate solution that obtains after filtering in front and generate the nickelous carbonate precipitation, obtain the nickelous carbonate product after separating drying after filtration.
In addition, generating the nickelous carbonate post precipitation, adding sulfuric acid reaction again and generate nickelous sulfate, handling to obtain the nickelous sulfate product again through routine.
Claims (3)
1, the environmental protection of waste Ni-Cd battery utilizes method, it is characterized by: comprise the steps,
A, waste Ni-Cd battery is shelled the back at 450-600 degree roasting temperatures 1-3 hours, make organic carbon wherein, the NI-G compound is converted into corresponding oxide, be cooled to room temperature, positive/negative plate is taken out the back reclaim as the old metal alloy, and the remaining NI-G hopcalite that contains is worn into the recovery raw material with colloid mill with the metal shell of getting rid of;
B, reclaiming raw material adding sulfuric acid reaction, when the pH value of reaction solution reaches 2.5-3.5, in solution, add an amount of hydrogen peroxide and make and reclaim in the raw material not that the ferrous ion of complete oxidation is oxidized to ferric ion and hydrolysis generates the ferric subsulfate precipitation, mixed solution is filtered;
C feeds hydrogen sulfide in the filtrate after the b step, makes cadmium ion generate the sulfide-cadmium precipitation that is insoluble in diluted acid, mixed solution is filtered again;
D, the filter residue cadmium sulfide after filtering in the c step fully is oxidized to cadmium sulfate through air, adds sodium carbonate again and generates the cadmium carbonate precipitation, and the separating, washing drying obtains the cadmium carbonate product after filtration again;
E adds sodium carbonate and generates the nickelous carbonate precipitation in the filtrate filtered in the c step, obtain the nickelous carbonate product after separating drying after filtration.
2, the environmental protection of waste Ni-Cd battery according to claim 1 utilizes method, it is characterized in that: reclaim raw material adds behind the sulfuric acid and bubbling air reclaims raw material with promotion dissolving, reaction in the described b step.
3, the environmental protection of waste Ni-Cd battery according to claim 1 utilizes method, it is characterized in that: generate the nickelous carbonate post precipitation in the described e step, add sulfuric acid reaction again and generate nickelous sulfate, can get the nickelous sulfate product through conventional treatment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100971491A CN100483843C (en) | 2006-10-25 | 2006-10-25 | Environment protection using method for waste Ni-Cd battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100971491A CN100483843C (en) | 2006-10-25 | 2006-10-25 | Environment protection using method for waste Ni-Cd battery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1949584A CN1949584A (en) | 2007-04-18 |
| CN100483843C true CN100483843C (en) | 2009-04-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2006100971491A Expired - Fee Related CN100483843C (en) | 2006-10-25 | 2006-10-25 | Environment protection using method for waste Ni-Cd battery |
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| CN (1) | CN100483843C (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101451246B (en) * | 2007-11-29 | 2011-01-12 | 比亚迪股份有限公司 | Metal recovery method in waste nickel-cadmium battery |
| CN101613804B (en) * | 2009-07-28 | 2011-04-20 | 北京科技大学 | Method for recovering cadmium from waste nickel-cadmium battery |
| JP5254407B2 (en) * | 2010-08-30 | 2013-08-07 | Ｊｘ日鉱日石金属株式会社 | Cathode active material leaching method |
| CN110605105A (en) * | 2019-08-23 | 2019-12-24 | 北京航天国环技术有限公司 | Method for regenerating metal from waste activated carbon |
| CN112429888A (en) * | 2020-11-12 | 2021-03-02 | 陕西省石油化工研究设计院 | Method for recycling cadmium-containing heavy metal wastewater |
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- 2006-10-25 CN CNB2006100971491A patent/CN100483843C/en not_active Expired - Fee Related
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| Publication number | Publication date |
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| CN1949584A (en) | 2007-04-18 |
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