CN1949584A - 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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- CN1949584A CN1949584A CNA2006100971491A CN200610097149A CN1949584A CN 1949584 A CN1949584 A CN 1949584A CN A2006100971491 A CNA2006100971491 A CN A2006100971491A CN 200610097149 A CN200610097149 A CN 200610097149A CN 1949584 A CN1949584 A CN 1949584A
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- cadmium
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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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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 invention relates to an environment-friendly method for recycling waste metal, in particular to an environment-friendly method for recycling nickel and cadmium in waste nickel-cadmium batteries.
Background
The environmental pollution caused by the continuously increasing wastenickel-cadmium batteries is more and more serious, and the problem of how to treat the pollution of the waste nickel-cadmium batteries is highly regarded by the whole society. At present, the waste nickel-cadmium battery is treated by mainly adopting pyrogenic process (such as high-temperature calcination) smelting to recover nickel products, and cadmium cannot be well utilized in the smelting process, so that the environment is still seriously threatened by pollution, and meanwhile, cadmium can cause toxic damage to human bodies in the smelting process.
Disclosure of Invention
The invention aims to provide an environment-friendly utilization method of waste nickel-cadmium batteries with environmental protection and economic value aiming at the defects of the waste nickel-cadmium batteries treated by pyrometallurgical process at present.
The technical scheme for realizing the purpose is as follows:
the environment protecting utilization process of waste Ni-Cd battery includes the following steps:
a, roasting the waste nickel-cadmium battery for 1-3 hours at the temperature of 450-600 ℃ after the waste nickel-cadmium battery is shelled, carbonizing organic matters in the waste nickel-cadmium battery, converting nickel-cadmium compounds into corresponding oxides, cooling to room temperature, taking out the positive and negative plates, recovering the positive and negative plates and the removed metal shell as waste metal alloy, and grinding the remaining mixture containing nickel-cadmium oxides into a recovered raw material by using a colloid mill;
b, adding sulfuric acid into the recovered raw materials for reaction, adding a proper amount of hydrogen peroxide into the solution when the pH value of the reaction solution reaches 2.5-3.5 to oxidize ferrous ions which are not completely oxidized in the recovered raw materials into ferric ions and oxidize and hydrolyze the ferric ions to generate basic ferric sulfate precipitate, and filtering the mixed solution;
c, introducing hydrogen sulfide into the filtrate obtained in the step b to enable cadmium ions to generate cadmium sulfide precipitate insoluble in dilute acid, and filtering the mixed solution;
d, fully oxidizing the filter residue cadmium sulfide filtered in the step c into cadmium sulfate through air, adding sodium carbonate to generate cadmium carbonate precipitate, filtering, separating, washing and drying to obtain a cadmium carbonate product;
and e, adding sodium carbonate into the filtrate filtered in the step c to generate nickel carbonate precipitate, and filtering, separating and drying to obtain a nickel carbonate product.
Furthermore, sulfuric acid is added into the recovered raw materials in the step b, and air is introduced to promote the dissolution and reaction of the recovered raw materials.
And d, after the nickel carbonate precipitate is generated in the step e, adding sulfuric acid to react to generate nickel sulfate, and performing conventional treatment to obtain a nickel sulfate product.
The main chemical reaction equations related to the technical scheme and the technical measures are as follows:
the invention has the advantages that the waste nickel cadmium, especially the cadmium, can be recycled, the extraction rate of the cadmium can reach more than 99 percent, no environmental pollution is caused in the production process, and the invention has higher social and economic benefits.
Detailed Description
The following are specific embodiments of the present invention:
the waste nickel-cadmium battery is roasted for 2 hours at the temperature of 500 ℃ after being shelled, organic matters in the waste nickel-cadmium battery are carbonized, nickel-cadmium compounds are converted into corresponding oxides, the waste nickel-cadmium batteries are cooled to room temperature, the positive and negative plates are taken out and recycled as waste metal alloys (for example, the waste metal alloys are smelted into alloys again) together with the removed metal shell, and the rest mixture containing the nickel-cadmium oxides is ground into recycled raw materials by a colloid mill; adding sulfuric acid into the recovered raw materials for reaction, introducing air to promote the dissolution and reaction of the recovered raw materials, adding a proper amount of hydrogen peroxide into the solution when the pH value of the reaction solution reaches 3 so as to oxidize ferrous ions which are not completely oxidized in the recovered raw materials into ferric ions and oxidize and hydrolyze the ferric ions to generate basic ferricsulfate precipitate, and filtering the mixed solution; introducing hydrogen sulfide into the filtrate to enable cadmium ions to generate cadmium sulfide precipitate which is insoluble in dilute acid, and filtering the mixed solution; then, the filtered filter residue cadmium sulfide is fully oxidized into cadmium sulfate by air, sodium carbonate is added to generate cadmium carbonate precipitate, and the cadmium carbonate product is obtained by filtering, separating, washing and drying; and adding sodium carbonate into the filtrate of the nickel sulfate solution obtained after the previous filtration to generate nickel carbonate precipitate, and filtering, separating and drying to obtain a nickel carbonate product.
In addition, after nickel carbonate precipitation is generated, sulfuric acid is added to react to generate nickel sulfate, and a nickel sulfate product can be obtained through conventional treatment.
Claims (3)
1. The environmental protection utilization method of the waste nickel-cadmium battery is characterized in that: comprises the following steps of (a) carrying out,
a, roasting the waste nickel-cadmium battery for 1-3 hours at the temperature of 450-600 ℃ after the waste nickel-cadmium battery is shelled, carbonizing organic matters in the waste nickel-cadmium battery, converting nickel-cadmium compounds into corresponding oxides, cooling to room temperature, taking out the positive and negative plates, recovering the positive and negative plates and the removed metal shell as waste metal alloy, and grinding the remaining mixture containing nickel-cadmium oxides into a recovered raw material by using a colloid mill;
b, adding sulfuric acid into the recovered raw materials for reaction, adding a proper amount of hydrogen peroxide into the solution when the pHvalue of the reaction solution reaches 2.5-3.5 to oxidize ferrous ions which are not completely oxidized in the recovered raw materials into ferric ions and hydrolyze the ferric ions to generate basic ferric sulfate precipitate, and filtering the mixed solution;
c, introducing hydrogen sulfide into the filtrate obtained in the step b to enable cadmium ions to generate cadmium sulfide precipitate insoluble in dilute acid, and filtering the mixed solution;
d, fully oxidizing the filter residue cadmium sulfide filtered in the step c into cadmium sulfate through air, adding sodium carbonate to generate cadmium carbonate precipitate, filtering, separating, washing and drying to obtain a cadmium carbonate product;
and e, adding sodium carbonate into the filtrate filtered in the step c to generate nickel carbonate precipitate, and filtering, separating and drying to obtain a nickel carbonate product.
2. The method for environmentally friendly utilization of waste nickel-cadmium batteries according to claim 1, wherein: and c, adding sulfuric acid into the recovered raw materials in the step b, and introducing air to promote the dissolution and reaction of the recovered raw materials.
3. The method for environmentally friendly utilization of waste nickel-cadmium batteries according to claim 1, wherein: and e, adding sulfuric acid to react to generate nickel sulfate after the nickel carbonate precipitate is generated in the step e, and obtaining a nickel 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 true CN1949584A (en) | 2007-04-18 |
| CN100483843C 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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Cited By (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 |
| CN102544628A (en) * | 2010-08-30 | 2012-07-04 | 吉坤日矿日石金属株式会社 | Method for leaching positive electrode active material |
| 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 |
-
2006
- 2006-10-25 CN CNB2006100971491A patent/CN100483843C/en not_active Expired - Fee Related
Cited By (6)
| 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 |
| CN102544628A (en) * | 2010-08-30 | 2012-07-04 | 吉坤日矿日石金属株式会社 | Method for leaching positive electrode active material |
| CN102544628B (en) * | 2010-08-30 | 2014-09-10 | 吉坤日矿日石金属株式会社 | Method for leaching positive electrode active material |
| 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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| CN100483843C (en) | 2009-04-29 |
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Granted publication date: 20090429 Termination date: 20111025 |