Production process of high-purity copper powder using waste copper enameled wire

Abstract

The invention discloses a high-purity copper powder production process utilizing waste copper enameled wires. The process includes S1, sorting, namely sorting capillary copper enameled wires with the diameters ranging from 0.04mm to 0.1mm, cleaning and drying the waste copper enameled wires sequentially; S2, conveying the sorted capillary copper enameled wires into a melting furnace and heating for pyrolysis in the sealed and oxygen-free environment, and cooling in a forced manner; S3, crushing and winnowing the furnace material formed by cooling after melting furnace heating pyrolysis, crushing the furnace material in a rough manner, and removing the active carbon ash produced by pyrolysis; S4, performing ball milling or turbine self-cooling crushing and screening operation on rough-crushed furnace material sequentially to obtain high-purity copper powder. The process is capable of producing high-level copper powder through short procedures and low cost.

Description

technical field [0001] The invention relates to a production process of copper powder, in particular to a production process of high-purity copper powder utilizing waste copper enameled wires. Background technique [0002] The raw materials used in the production of copper enameled wire are high-purity copper raw materials, and its copper content can reach 99.999-99.9999%, and the thinner the enameled wire, the higher the copper quality. At present, after the general copper enameled wire is used, it is disassembled, sorted and recycled from waste hardware. Due to the high burning loss rate of conventional smelting and recycling of thin wire, the price is relatively low. Usually, cathode copper electrolysis method, chemical method or water atomization are used to produce copper powder. It is difficult to produce high-purity copper powder. To maintain the purity of the process and the purity of the solvent used, there are basically oxidation-reduction-crushing-sieving. The di...

AI Technical Summary

Problems solved by technology

Copper powder is usually produced by cathodic copper electrolysis, chemical method or water atomization, which is difficult to produce high-purity copper powder. To maintain the purity of the process and the purity of the solvent used, there are basically oxidation-reduction-crushing-sieving. Separate process, long process, high cost, low quality, and low output, that is, the copper powder produced is of low grade, resulting in low use value and economic value

Most of the existing high-purity copper powder production methods cost more than 200,000 yuan / ton

The price of the product is 350-450 yuan / kg, and the output is also low

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