The permanent cathodic electrolysis method was developed and produced by the Dunsville Refinery in Australia in 1978. Its main feature is the replacement of the conventional electrode sheet with a reusable stainless steel mother plate. The cathode copper product is automatically stripped from the stainless steel mother plate. After stripping, the mother board is processed and returned to the production system for reuse. The permanent cathode plate is made of 316L stainless steel plate with a thickness of about 3.25mm. The conductive bar has a hollow rectangular section. The material is 304L stainless steel welded on the 316L mother plate. The bar is plated with copper and has a thickness of 1.3~2.5mm. It has good electrical conductivity. The mother board is covered with acrylic PVC plastic strips on both sides, and the bottom side is coated with wax. The service life can reach 15 years. The process is equipped with anodizing unit, residual charging unit, cathode washing unit, special crane and other equipment. The production technical indicators of all aspects are superior to the traditional methods.
During the electrolysis process, copper is precipitated on the stainless steel plate. After a cathode cycle is completed, the cathode copper is stripped from the stainless steel cathode, and the stainless steel cathode is again charged into the electrolytic cell for electrolysis in the next cycle. Repeatedly and repeatedly. Therefore, the traditional plate electrolysis cell was eliminated, and a cathode washing and stripping unit was set up, replacing the three lines of the initial electrode production unit, the conductive rod storage unit and the electric copper washing unit. Its main advantages are:
1. Due to the use of the permanent stainless steel cathode, the production of the initial piece and the corresponding assembly of the cathode are omitted, and the production process is simplified.
2. Due to high permanent cathode strength, good straightness and smooth surface, it can shorten the same pole pitch, reduce short circuit and increase current density. Therefore, both the quality of the product and the production of copper can be improved.
3. The cathode cycle is short, and the backlog of copper is small, which speeds up capital turnover.
4. High degree of mechanization and less operators. Due to the use of stainless steel permanent cathodes and high degree of mechanization, a one-time investment is large