Method for preparing copper powder via electrolytic self-desorption

Abstract

The invention discloses a method for preparing copper powder via electrolytic self-desorption, which relates to a preparation method of copper powder and solves the problems of low efficiency, high energy consumption and high cost due to the defects of requiring regular powder scraping, ball milling and screening in the processes of preparing copper powder via electrolysis in the prior art. The method for preparing copper powder via electrolytic self-desorption comprises the following steps: taking a platinum sheet and a platinum needle as two electrode materials, taking copper sulfate solution as electrolyte and carrying out electrolysis by using an alternating current method; taking the platinum sheet as cathode and the platinum needle as anode or taking the platinum sheet as anode and the platinum needle as cathode; and carrying out electrolysis by taking the process as an alternating current supply period so that the copper powder prepared on a platinum sheet plate can be self-desorbed smoothly. The method of the invention has the advantage that the platinum sheet and the platinum needle are taken as two electrode materials and the direction and the amount of the current are periodically and alternately changed so that the electrolyzed copper powder can be self-absorbed from the platinum sheet polar plate, powder scraping, ball milling and screening are not required, the efficiency is improved, the energy consumption is reduced and the cost is reduced.

Description

technical field [0001] The invention relates to a method for preparing copper powder. Background technique [0002] The production of industrial copper powder in foreign countries began in the 1920s, and our country began the production experiment of electrolytic copper powder in 1958, and achieved success in the mid-1960s. my country's first copper powder production line was established in the 1970s. With the rapid growth of the national economy, the demand for copper powder in my country began to increase rapidly in the 1980s. In 2005, the total consumption of copper powder reached more than 11,000 tons, and it increased at a rate of 10% year after year. The consumption structure of copper powder in my country is mainly in the three major fields of diamond tools, powder metallurgy parts and electric carbon industry. Accounting for 95% of the entire copper powder consumption, the other 5% is used in other industries, mainly in the fields of high catalytic activity and sel...

AI Technical Summary

Problems solved by technology

The preparation of ultra-fine copper powder by the electrolysis method in the prior art generally requires regular scraping of the powder at certain intervals to prevent the copper particles from growing up, and then ball milling and screening are required, which has low efficiency, high energy consumption, and high cost