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Treatment method of nickel cadmium calcium battery mud

A treatment method, calcium battery technology, applied in sludge treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve environmental pollution and other problems, and achieve the effect of no environmental pollution, high social and economic benefits

Inactive Publication Date: 2009-03-25
丁四宜 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

If the sludge generated in these production processes is not effectively treated, it will seriously pollute the environment

Method used

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  • Treatment method of nickel cadmium calcium battery mud
  • Treatment method of nickel cadmium calcium battery mud
  • Treatment method of nickel cadmium calcium battery mud

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[0028] Mix the battery sludge and water in a ratio of 1:1 to make a slurry, slowly add sulfuric acid and fully stir until the pH value is 3, continue stirring for 30 minutes, slowly add hydrogen peroxide to remove iron in the solution, until the iron content in the solution meets the requirements, the reaction process The hydroxide of nickel and cadmium in the medium produces nickel sulfate and cadmium sulfate, and generates calcium sulfate precipitation. The reaction product is heated to 80 degrees and vacuum filtered, and the filter residue is washed with water until the washing liquid is neutral. If the filter residue is washed strictly with water, the filter residue The cadmium content in the medium can be lower than 0.005%, and the filter residue can be iron-containing calcium sulfate product after drying, which can be used as a cement additive.

[0029] Add the solution containing nickel-cadmium ions from the previous filtrate and water-washed filter residue into the cadm...

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Abstract

This invention relates to a Nickel-cadmium batteries sludge treatment methods, including the following steps: a. through acidification to remove calcium and iron, get calcium sulfate; b. Ni and Cd separation, get cadmium sulfide products; C. sediment of nickel , gain carbonic nickel, carbonic nickel through calcination to obtain nickel oxide product, and the filtrate through concentration and evaporation to gain sodium sulfate products. The advantages of this invention is to recover the nickel, Cd and calcium from the nickel-cadmium batteries calcium in the battery production process, and the production process pollution-free, with high social and economic benefits.

Description

technical field [0001] The invention relates to an environment-friendly recycling method for waste metals, in particular to an environment-friendly recycling method for treating nickel-cadmium-calcium battery sludge produced by battery manufacturers after producing batteries containing nickel and cadmium. Background technique [0002] Most of the power supplies of portable electronic products used today are nickel-cadmium or nickel-metal hydride rechargeable batteries, and these battery companies will produce a large amount of sludge containing cadmium, nickel, etc. that are harmful to the environment during their production process (such as Wuxi Panasonic Battery). Among the components of these sludges, water accounts for 50-70%, nickel accounts for 3-4%, cadmium accounts for 6-9%, and calcium, silicon, iron, etc. account for 8-15%. If the sludge generated in these production processes is not effectively treated, it will seriously pollute the environment. Contents of the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F11/00C01F11/46C01G11/02C01G53/06
Inventor 王水平丁四宜
Owner 丁四宜