Producing method of electrolytic copper powder

Abstract

The invention discloses a producing method of electrolytic copper powder. The method comprises steps of: inserting an electrolytic copper plate that is a raw material into a conductive copper bar so as to adopt the inserted copper plate as a copper negative plate, electrolyzing in an electrolytic tank, filtering obtained electrolytic copper powder and a mixed solution containing electrolyte, elutriating, drying and reducing the wet electrolytic copper powder, smashing and screening. In the electrolytic process, the copper ion concentration in the electrolyte is 5-7 g / L, the sulfuric acid concentration is 120-150 g / L, the electrolytic temperature is 45-55 DEG C, the current in the electrolytic tank is 13000 A, the powder scrapping time is 30-40 min for one time of powder scrapping, and the electrolyte is fed in a manner of feeding in a direction parallel to the negative plate and the positive plate. The method omits a step of casting melt electrolytic copper into the positive plate of a certain specification and shapes, effectively reduces the production cost and improves the quality of the produced electrolytic powder. The produced electrolytic powder has a size not more than 200 meshes and is high in purity. Electrolysis can be normally performed in the electrolytic tank when the voltage is 1.6-1.8 volts, thus largely reducing the energy consumption. The electrolytic efficiency can be 80-85%.

Description

technical field [0001] The invention relates to a production method of electrolytic copper powder, in particular to a production method of electrolytic copper powder with low production cost. Background technique [0002] At present, the basic method of producing electrolytic copper powder is to produce the raw material electrolytic copper plate of copper powder (such as figure 1 [0003] shown) is melted in a copper furnace and cast into a small cathode plate of a certain specification (such as figure 2 shown), then put in the [0004] electrolysis in an electrolytic cell. Generally, there are the following procedures: [0005] Electrolytic copper plate——→Smelting in copper melting furnace——→Copper cathode plate——→Electrolysis in electrolytic tank——→ [0006] Electrolytic copper powder and mixed solution containing electrolyte ——→ Filtration and elutriation in the elutriation tank——→ Wet electrolytic copper powder [0007] ——→Drying and reduction——→Dry electroly...

AI Technical Summary

Problems solved by technology

[0008] The above traditional methods have the following disadvantages: the electrolytic copper plate is melted and cast into a cathode plate of a certain specification and shape, which will consume a large amount of natural gas energy; there will be a certain amount of metal loss during the smelting process; graphite, iron and other inclusions will enter the copper cathode during the casting process board, affecting the quality of copper powder

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