Copper sponge preparation process by reducing copper contained acidic leachate with iron powder

Abstract

The invention discloses a copper sponge preparation process, especially a copper sponge preparation process by reducing a copper contained acidic leachate with iron powder, and belongs to the technical field of chemical production and manufacture. Provided is copper sponge preparation process by reducing a copper contained acidic leachate with iron powder, with a low labor intensity and high automation degree. The intermediate comprises steps of: the iron powder and the copper contained acidic leachate, which participate in a reaction, are added into a main reaction tank of a reactor at a certain speed and treated with a certain displacement reaction under effect of a stirrer; then the mixture is sent into an intermediate reaction tank and treated with a slaking displacement reaction to generate copper sponge and ferrous sulphate; then the mixture is sent into a settler to separate the copper sponge at a settler bottom and a tail washing in an upper and middle part of the settler; at last, the copper sponge is collected through a dump valve at the settler bottom, and the tail washing is discharged from an overflow mouth at settler top.

Description

technical field [0001] The invention relates to a process for preparing sponge copper, in particular to a process for preparing sponge copper by reducing iron powder to copper-containing acidic leaching solution, and belongs to the technical field of chemical production and manufacturing. Background technique [0002] In the prior art, the processes for preparing sponge copper with copper-containing acidic leaching solution are all batch-type. The method is to first put a certain concentration of copper-containing acidic leaching solution into the replacement tank, and then add a certain amount of reducing agent according to the molar ratio of copper in the leaching solution. Iron powder is reacted for a certain period of time under mechanical or compressed air stirring, and the sponge copper is obtained by phase separation after the reaction is completed. For the process of producing sponge copper by batch displacement reaction, many documents have mentioned and optimized i...

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Problems solved by technology

Another example is Chen Shunfang and Zhong Wenyuan's "Production of Copper Sponge by Tank Dipping Complex Copper Oxide Ore", Nonferrous Metals (Smelting Part), Issue 01, 2000, which proposed a method to optimize the production of sponge copper from complex copper oxide ore in Zhaotong, Yunnan. This technology settles the leach solution after settling and clarification again through the intermediate tank to remove the residual pulp in the leach solution, reduce the wrapping of copper ions by the pulp, and thus improve the replacement rate of the replacement reaction. This document also adopted this method for a sponge copper factory in Zhaotong Yiliang The cost composition and the economic benefits generated by the technology were analyzed. Through the economic benefit analysis, it was found that although a sponge copper factory in Zhaotong Yiliang obtained good economic benefits by adopting this technology, there was labor in the stage of preparing sponge copper from the leaching solution. Problems such as high intensity, low degree of automation, and large pollution

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