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

A zinc-manganese battery, alkaline technology, applied to the improvement of process efficiency, photography technology, instruments, etc., can solve the problems of indium loss, low recovery rate, instability, etc., achieve recycling, simple operation process, and recovery The effect of rate stabilization

Inactive Publication Date: 2008-01-16
SOUTH CHINA NORMAL UNIVERSITY
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  • Abstract
  • Description
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  • Application Information

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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

[0038] The method for recovering indium from waste and old mercury-free alkaline zinc-manganese batteries of the present invention comprises the following steps: separating and extracting the negative electrode material of waste and old mercury-free alkaline zinc-manganese batteries, which can be specifically prepared by existing methods, such as: using the patent application number For 200620059353.X's "Recycling and Treatment Device for Waste Alkaline Zinc-Manganese Batteries", the waste mercury-free alkali-manganese battery is cut open, the positive and negative electrodes can be separated through screening, the negative electrode is taken out, and the brass nails, plastic cover and diaphragm are removed , to obtain the negative electrode material.

[0039] After obtaining the above-mentioned negative electrode material, then implement the following steps:

[0040] steps

[0041] steps

[0042] Indium

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Abstract

The invention discloses a method for recycling indium from waste Hg-free alkaline zinc manganese dioxide battery, which comprises the following steps: separating and extracting the cathode material from waste Hg-free alkaline zinc manganese dioxide battery, dissolving with an acid, adding a reducing agent to replace sponge indium, and smelting the sponge indium to obtain indium ingots, the filtrate being used for electrolytic zinc process; or alternatively adjusting the pH value of the solution to 5 with a base solution after acid dissolution to allow the precipitation of In(OH)3, filtering to separate the filtrate used for electrolytic zinc process and the precipitate used as electrolyte after acid dissolution, and electrolyzing to obtain pure indium. Based on the existing state of indium in the 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 recycle of indium and has the advantages of simple process, easy application, high and stable recovery rate of indium, less use of chemical additives in the recycle process, no secondary pollution, and high purity of extracted metal indium. Therefore, the invention realizes the cyclic regeneration of cathode material of waste alkaline zinc manganese dioxide battery and is better in economic benefit and environment-protection value.

Description

technical field [0001] The invention relates to waste battery recovery technology, in particular to a method for recovering indium 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 in literatu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B58/00C22B3/06C22B3/22C22B3/44C25C1/22C25C1/16C22B9/00
CPCY02P10/20
Inventor 黄启明李伟善
Owner SOUTH CHINA NORMAL UNIVERSITY
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