Method for recycling valuable metal from electronic waste

Abstract

The invention discloses a method for recycling valuable metal from electronic waste. The method comprises the following steps that 1, the electronic waste is immersed into sulfuric acid to obtain a mixture A; 2, ozone is introduced to react with the mixture A after the mixture A is heated to 40-60 DEG C, and a mixture B is obtained after the reaction is completed, wherein the amount of the introduced ozone corresponding to every one kg of electronic waste is not less than 2 L / h, and the reaction time is not less than 2 h; and 3, the mixture B is subjected to solid-liquid separation, and obtained liquid is copper sulfate solution. According to the method, the electronic waste does not need to be smashed before being subjected to acid immersion; the method is implemented at low temperature and normal pressure, investment is less relatively, and the operating cost is low; the process is simple, energy consumption is low, the production cost is low, the recovery rate of the valuable metal is high, and the method is applicable to large-scale industrial production; the ozone used for the method cannot pollute the environment, no pollutants such as sulfur dioxide can be produced in the leaching process, and good economic benefits and environmental benefits are realized.

Description

technical field

[0001] The invention belongs to the technical field of electronic waste treatment, and in particular relates to a method for recovering valuable metals from electronic waste. Background technique

[0002] Electronic waste, also known as electronic waste, refers to electrical appliances or electronic equipment that are discarded and no longer used, mainly including household appliances such as refrigerators, air conditioners, washing machines, and televisions, and electronic communication products such as computers. Electronic waste is not waste, but a secondary resource to be developed, which has a high recycling value. The grade of metals contained in electronic waste, especially precious metals, is dozens or even hundreds of times higher than that of natural mineral deposits, and the recycling cost is generally lower than that of mining natural mineral deposits. Statistics show that it costs about US$300,000 to mine 1 ton of silver from raw ore, but it onl...

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