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Method for extracting indium-zinc alloy from waste mercury-free basic zinc-manganese battery

A zinc-manganese battery, alkaline technology, applied in the field of extracting indium-zinc alloy, can solve the problems of low recovery rate, loss of indium, instability and the like, and achieve the effects of simple operation process, high recovery rate and stable recovery rate

Inactive Publication Date: 2008-01-16
SOUTH CHINA NORMAL UNIVERSITY
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Problems solved by technology

But this method is in the processing process, owing to there is more oxidizing agent (the anode material MnO that has not acted completely 2 ), indium may be transformed into In(OH) 3 , due to In(OH) 3 The complexity of dissolving in alkaline solution can easily cause the loss of indium, so this method has the disadvantages of low recovery and instability

Method used

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Embodiment

[0021] The method for extracting indium-zinc alloy from waste mercury-free alkaline zinc-manganese batteries of the present invention includes the following steps: separating and extracting the negative electrode material of waste mercury-free alkaline zinc-manganese batteries, which can be specifically prepared by using existing methods, such as: using patented The application number is 200620059353.X "Recycling and processing device for waste alkaline zinc-manganese batteries". The waste mercury-free alkaline manganese batteries are cut open, the positive and negative electrodes can be separated through screening, the negative electrodes are taken out, and the brass nails and plastic covers are removed. And separator, just get negative electrode material.

[0022] After obtaining the above-mentioned negative electrode material, then implement the following steps:

[0023] steps

[0024] The volume percentage is as follows:

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Abstract

The invention discloses a method for extracting indium-zinc alloy from waste Hg-free alkaline zinc manganese dioxide battery, which comprises separating and extracting cathode substances from waste Hg-free alkaline zinc manganese dioxide battery, dissolving with a coordination agent containing zinc ions, electrolyzing the filtrate to obtain zinc, and smelting the insoluble substances to obtain indium-zinc alloy. Based on the existing state of indium in waste Hg-free alkaline zinc manganese dioxide battery and the practical recovery of waste Hg-free alkaline zinc manganese dioxide battery, the invention realizes the indium recovery and has the advantages of simple process, easy application, high and stable recovery rate of indium, less use of chemical additives in the recovery process, and no secondary pollution. The recycled indium-zinc alloy (indium content of 0.1-99.9 percent) can be used as a raw material of cathode material (indium-containing zinc powder) in the production of Hg-free alkaline manganese battery. The invention realizes the cyclic regeneration of cathode material of waste alkaline zinc manganese dioxide battery, and the industrial output value of the extract is far larger than the recovery and production costs, therefore, the invention is better in economic benefit and high environment-protection value.

Description

technical field [0001] The invention relates to waste battery recycling technology, in particular to a method for extracting indium-zinc alloy from waste mercury-free alkaline zinc-manganese batteries. Background technique [0002] my country is a big producer and consumer of zinc-manganese batteries. Since January 1, 2005, the alkaline zinc-manganese batteries produced in China have been completely mercury-free, and the production and consumption of alkaline zinc-manganese batteries occupy a dominant position in primary batteries. The main measure for mercury-free alkaline zinc-manganese batteries is to use suitable mercury substitute additives. Mercury substitute additives usually include inorganic type (such as indium, gallium, thallium, aluminum and other metal elements or compounds) and organic type (such as biphenyls, alcohol amines, amides and other compounds) to achieve mercury in the battery effect. There are many combinations of mercury substitute additives used...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B58/00C22C1/02
CPCY02P10/20
Inventor 黄启明李伟善
Owner SOUTH CHINA NORMAL UNIVERSITY
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