One-step producing technique for high-purity gold

Abstract

A one-step high purity gold production process includes four procedures, namely gold electrolyte making, gold electrolyte preparation, high purity gold electrolysis and finished product treatment. The one-step high purity gold production process of the invention well solves the problems of cathode verticality and smoothness, so the high purity gold produced in appropriately adjusted proportion of electrolyte has even surface, with thickness difference less than 0.1mm; meanwhile, the physical specification of the electrolyzed gold can be well controlled and the quality high purity gold (containing 99.999percent gold) can be produced one step by simple means of controlling the electrolyzing time and current density, etc, with the recovery rate up to 99.95percent and the processing cost of only 0.1 to 0.12yuan / g.

Description

technical field [0001] The invention relates to a one-step high-purity gold production process. Background technique [0002] High-purity gold (99.999% gold) is mainly used as the raw material for the production of gold wires necessary for semiconductor connections. With the transfer of semiconductor production in the world (especially Taiwan) to China, in recent years, the demand for gold wires has increased by 20% to 80% per year. increase. At present, there is no manufacturer in China to produce high-purity gold (99.999% gold), and the production of high-purity gold abroad is basically carried out by electrolysis. The traditional high-purity gold production process generally uses 99.99% gold as the anode. It goes through three steps of starting electrode manufacturing-electrolysis-ingot casting. The tip discharge and uneven conduction caused by verticality and verticality, the surface particles of the high-purity cathode gold produced are more, larger, and uneven in thi...

AI Technical Summary

Problems solved by technology

The traditional high-purity gold production process generally uses 99.99% gold as the anode. It goes through three steps of starting electrode manufacturing-electrolysis-ingot casting. The tip discharge and uneven conduction caused by verticality and verticality, the surface particles of the high-purity cathode gold produced are more, larger, and uneven in thickness, and the impurity content in the surface particles is high, which affects the product quality; It is difficult to control the space environment, the product is extremely susceptible to dust pollution, the recovery rate is below 99.0%, and the processing cost is 0.8-1.0 yuan / g gold