Fixing structure based on interior of centrifugal device

Abstract

The invention discloses a fixing structure based on the interior of a centrifugal device. The fixing structure comprises a filter barrel. A fixing ring is arranged inside the filter barrel. A plurality of fixing holes are evenly formed in the wall of the filter barrel. A plurality of U-shaped fixing plates are arranged on the fixing ring, and two ends of the fixing plates are arranged on the fixing ring. The fixing ring is provided with L-shaped pins, and one ends of the pins penetrate the gaps between the fixing plates and the fixing ring to enter corresponding fixing holes. The fixing structure is simple in principle and small in force deformation; by means of evenly-arranged pins, a drying device can be fixed to the filter barrel stably, moisture in copper powder fluid can be dried effectively during drying, copper powder with high purity can be obtained, and subsequent processes are facilitated.

Description

technical field [0001] The invention relates to a fixed structure, in particular to a fixed structure based on the interior of centrifugal equipment, which belongs to environmental protection recovery equipment. 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 alloy and tin. It is ch...

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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 an increase in energy consumption and cost in the transportation process. At present, equipment that uses electrochemical principles to treat etching waste liquid has gradually appeared on the market. The post-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 a liquid-solid mixture and needs to be separated in a centrifuge. Centrifugation is to use the centrifuge rotor to high-speed The strong centrifugal force generated by the rotation accelerates the sedimentation speed of the particles in the liquid, and separates the substances with different sedimentation coefficients and buoyant densities in the sample. The internal structure of the traditional centrifuge is complex, difficult to maintain, and the efficiency of centrifugal drying is low. The fixing effect of the copper powder is poor. When the centrifugal drying is carried out, the internal liquid is often mixed, resulting in poor centrifugal effect of the copper powder, and the purity of the copper powder is not enough, so it cannot be stored and subsequently used.

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