The invention belongs to the technical field of electrolytic refining, and particularly relates to a low-gas-content electrolytic
cobalt preparation method. The method comprises the following steps that 1, a
cobalt ammonia system is built, specifically,
ammonia water of which the
mass fraction is 10-15% is added into a
cobalt chloride solution for complex reaction, and a cobalt
ammonia solution isobtained; 2, solution circulation is conducted, specifically, the solution obtained in the step 1 is poured into a diaphragm
electrolytic cell, and the flow speed in each
cathode diaphragm zone is 3-4L / h; and 3,
electrolysis is conducted, specifically, cobalt electrolytic deposition is carried out through a
pulse power supply, the duty ratio is controlled to be 40:1, the
gas element oxygen in anelectrolytic deposition cobalt pole plate is controlled to be lower than 10ppm, and carbon is controlled to be lower than 5ppm. According to the low-gas-content electrolytic cobalt preparation method,the unqualified problems that in the electrolytic
deposition process, due to the fact that the
cathode gas content is increased, the surface of the pole plate is loosened, pores are increased, and the electrolytic cobalt physical quality is reduced can be effectively solved, the electrolytic cobalt yield is greatly increased, in addition, technology operation is easy, and broadened scale production is facilitated.