Centrifugal device based on copper powder separating

Abstract

The invention discloses a centrifugal device based on copper powder separating. The centrifugal device comprises a hollow shell; a rotating seat is arranged in the center of the bottom of the shell, is connected to a motor arranged outside the shell, and is provided with a filter barrel; the wall face of the filter barrel is provided with a plurality of through holes, a fixing ring and a filter net are arranged in the filter barrel and are fixed to each other, and the circumference of the filter net is connected to the inner wall of the fixing ring. The centrifugal device is simple in structure, convenient to operate and high in centrifugal efficiency; precipitated copper in etching solution can be filtered and dried effectively, purity of the copper powder is guaranteed, and fine environment is provided to the copper powder for subsequent storage and use.

Description

technical field [0001] The invention relates to centrifugal equipment, in particular to centrifugal equipment based on the separation of copper powder, which belongs to environmental protection equipment for etching liquid treatment. Background technique [0002] The typical process of printed circuit board (PCB) processing adopts the "pattern plating method". That is to pre-plate a layer of lead-tin corrosion layer on the copper foil part that needs to be reserved on the outer layer of the board (the graphic part of the circuit), and then chemically corrode the rest of the copper foil, which is called etching. PCB etching is divided into two types: alkaline and acidic, one is hydrochloric acid hydrogen peroxide system (acidic); the other is ammonium chloride ammonia water system (alkaline). Alkaline etching solution is mainly suitable for the etching of graphic electroplating metal resist layers, such as printed boards plated with gold, nickel, tin-lead alloy, tin-nickel a...

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Problems solved by technology

At present, the alkaline etching solution is recycled by hazardous waste recyclers to produce copper sulfate products. The treatment process needs to consume a large amount of reagents, generate a large amount of washing wastewater, or the obtained product is not pure enough, and the etching solution cannot be directly regenerated, which is economical. The benefit is low, and the invalid etching solution cannot be recovered, which has a certain impact on the environment and leads to increased energy consumption and cost during transportation

At present, equipment that uses electrochemical principles to treat etching waste liquid has gradually appeared on the market. After treatment, the etching waste liquid can not only be recycled for a long time, but also can obtain considerable economic income—electrolytic copper. The copper powder produced by electrolysis is in the In the liquid-solid mixture, it needs to be separated in a centrifuge. Centrifugation is to use the strong centrifugal force generated by the high-speed rotation of the centrifuge rotor to accelerate the sedimentation speed of the particles in the liquid, and separate the substances with different sedimentation coefficients and buoyancy densities in the sample. The internal structure of the traditional centrifuge is complicated, maintenance is difficult, and the efficiency of centrifugal drying is low, which leads to poor centrifugation effect of copper powder, and the purity of copper powder is not enough, so it cannot be stored and used later.

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