Electrolytic copper-powder-processing technique

Abstract

An electrolytic copper-powder-processing technique includes electrolyzing, brushing, washing and dehydrating, roasting, restoring, grinding, sieving and other steps. An automatic brushing machine conducts brushing, negative electrode brushing format is two times up and two times down, brushing time is 20-60 seconds, brushing machine steeping time is controlled within 10-30 seconds, and brushing cycle is 30-60 minutes. Copper powder is conveyed to a washing dehydrating machine through an industrial hose pump. The washing dehydrating machine integrates filtering, washing, saponifying and dehydrating for the washing dehydrating step. The electrolytic copper-powder-processing technique achieves technique link of copper powder conveying, washing, dehydrating, roasting, restoring, sieving, mixing and packaging, greatly shortens technique process, achieves high automation degree, and reaches international advanced level in cleaning production, environment protection, resource composite recycling and the like.

Description

technical field [0001] The invention relates to a production method of copper powder, in particular to a process for producing copper powder by electrolysis, which belongs to the technical field of electrolytic powder production. Background technique [0002] Electrolytic copper powder is an important non-ferrous metal powder, which is widely used in powder metallurgy products. Electrolysis is also the main production method for producing copper powder, which mainly needs to go through technological processes such as electrolysis, powder brushing, washing, dehydration, powder drying, reduction, crushing, and screening. The domestic production of electrolytic copper powder has a history of about 50 years. Until now, most manufacturers are still using traditional production technology. The traditional backward technology has low production efficiency, high energy consumption, poor operating conditions, high cost, and low product grade. The main reasons are backward productio...

AI Technical Summary

Problems solved by technology

[0003] (1) Powder brushing operation: Traditional electrolytic copper powder production adopts manual powder brushing, which is not only labor-intensive and inefficient, but also the quality of copper powder cannot be guaranteed

[0004] (2) Copper powder washing and dehydration process: the traditional process adopts the natural filtration washing method of the powder washing tank, the copper powder is not easy to fully wash, and the dehydration effect is poor (the water content of wet copper powder can reach 40%), and a large amount of copper-containing wastewater is produced

In recent years, some enterprises have adopted centrifugal dehydration to reduce the water content of wet copper powder, but it is easy to cause oxidation of copper powder, and the dendritic shape of copper powder is easily damaged, and the labor intensity of operation has not been reduced.

[0005] (3) Copper powder drying process: The traditional process adopts the far-infrared furnace drying method (also known as low-oxygen drying method), which has low production efficiency and low product direct recovery rate (about 1 / 5 is re-produced as a return product) ), high power consumption (the average power consumption per ton of copper powder baking powder can be as high as 1200kwh / t), large metal loss and other problems are very prominent

Later, some enterprises adopted the method of drying the powder first and then reducing it with a steel belt reduction furnace. The aforementioned problems were basically solved, but it brought about the problem of high oxygen content in copper powder, and copper powder was easy to oxidize; some enterprises adopted rotary vacuum drying furnace Copper powder is baked, the oxygen content of copper powder is high, the color is dark, and the effect is not good

[0006] (4) Copper powder screening process: the traditional process uses a high-position flat screen without a vertical shaft, and some companies later use a disc vibrating screen, but the copper powder dust is serious, the labor intensity of the employees is high, and the environment is harsh

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