A kind of preparation technology of sponge copper

Abstract

The invention discloses a preparation technology for spongy copper. The preparation technology comprises the following steps that 1, an iron nail is fixedly installed on the inner bottom of a reaction tank through a fixing structure; 2, a feeding pipe of the outer bottom of the reaction tank is connected into a first material pump set, a copper-bearing acid leaching solution is introduced into the reaction tank through the first material pump set, and the copper-bearing acid leaching solution and the iron nail are subjected to a replacement reaction to obtain the spongy copper; 3, a filtering part arranged in the reaction tank separates the spongy copper from a ferrous sulfate mixture preliminarily, and then the spongy copper mixed liquid obtained after preliminary separating is guided out from the reaction tank; and 4, a press filter is adopted for carrying out press filtering on the spongy copper mixed liquid guided out in the step 3 to obtain spongy copper filter cakes. According to the preparation technology, by means of the steps, the spongy copper with high purity is prepared and obtained.

Description

technical field [0001] The invention relates to the technical field of preparing sponge copper, in particular to a preparation process of sponge copper. Background technique [0002] Literally speaking, sponge copper is copper that looks like a sponge, and its copper powder is reddish-brown powder. High-grade sponge copper powder is a very important industrial raw material, which can be used to refine copper metal and make cuprous octoate and other raw materials, and is widely used in the manufacture of various copper alloys, precision casting and other parts to replace copper materials. [0003] The application publication date is January 11, 2012, and the Chinese patent application publication number CN102312099A discloses a process for producing sponge copper by reducing iron powder to copper-containing acidic leaching solution. The copper acid leaching solution is connected to the main reaction tank of the reactor at a certain speed, and a certain displacement reaction ...

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Problems solved by technology

[0004] Although the iron powder used in the above technical solution can react quickly and efficiently with the copper-containing acidic leaching solution, the reaction degree of the raw material iron powder is large, and an internal circulation system is also installed in the main reaction tank and the intermediate reaction tank, which further increases the reaction of the iron powder. degree, but in the actual process, iron powder is difficult to completely react, which is also recognized in the reaction

Then when iron powder is continuously added to the main reaction tank, first: because the iron powder only has a certain weight, under the action of the agitator of the above scheme, the unreacted iron powder is easy to float up and flow into the settling tank together with the product sponge copper Second: Since the newly added iron powder needs a period of time to react with the copper-containing acidic leaching solution thoroughly, the main reaction tank and the intermediate reaction tank, and the intermediate reaction tank and the settling tank are connected structures. The reaction is not carried out in a closed system for a period of time, so the newly added iron powder will flow directly into the settling tank without reaction due to the stirring effect of the stirrer, so the sponge copper obtained from the settling tank is mixed with Iron impurities are very difficult to remove in the later stage, and a new preparation process needs to be proposed

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