Process for separating and purifying zinc and manganese dioxide in compositive treating waste battery

Abstract

The invention discloses a technique to separate and purify the zinc and manganese dioxide in the process of integration managing scrap batteries, crushing the scrap batteries, filtering the metal zinc and sheet iron, floating carbon powder, electrolysing the remanent powdery mixture to seperate the powder of zinc and manganese dioxide, electrolysing the remanent solution in the same electrolytic cell and at the same time under room temperature. The zinc and manganese dioxide deposit at the cathode and anticathode separately. The invention is featured by simple technique and without environmental pollution.

Description

technical field [0001] The invention relates to a process for separating and purifying waste batteries, in particular to a process for separating and extracting zinc and manganese dioxide from the comprehensive treatment of waste batteries. technical background [0002] In daily life, people are increasingly dependent on the application of batteries. In 2000, the annual consumption of various batteries in my country reached 8×10 9 only. Generally, disposable zinc-manganese batteries (acidic or alkaline) are the most used batteries in daily life. If these batteries are mixed with domestic waste, incinerated or landfilled, they will pose a certain threat to the environment and human health. At the same time, this kind of waste battery contains a large amount of renewable metal resources such as zinc and manganese dioxide that have not been consumed. If it can be recycled, it will not only save a lot of resources, but also have certain social benefits. At present, when recycl...

AI Technical Summary

Problems solved by technology

Prior Art Invention Title "Method for Extracting Zinc and Manganese Dioxide from Waste Dry Batteries" Application No. 94111199.7 Publication Date April 17, 1996. The method includes reduction roasting, granulation and purification, and then electrolysis in the same cell at 80-95°C; Its shortcomings are: 1. After the waste battery is crushed, zinc powder and manganese dioxide powder are reduced and roasted and then electrolytically separated; during the roasting process, it is easy to cause secondary pollution of the atmosphere; 2. A large amount of unreacted MnO in the battery 2 The powder needs to be reduced and roasted, and then electrolytically oxidized, resulting in a waste of energy. 3. There are also technological deficiencies and defects in electrolytic separation

If the electrolysis temperature is too high, the acid mist will easily cause secondary pollution. If high temperature is used, the harmful effects of impurities will be intensified.

If the temperature is too high, deep purification of the mixed solution is required, otherwise the impurities will be very active in the electrolysis, which will easily lead to zinc burning and the product quality will hardly meet the technical requirements

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