Technology for leaching cobalt-copper white alloy

Abstract

The invention relates to technology for leaching a cobalt-copper white alloy, which is characterized by comprising the following steps of: a, grinding the cobalt-copper white alloy by adopting crushing equipment, and sieving with a sieve with 80 to 100 meshes for later use; b, mixing in a molar ratio of Cu2+ in soluble copper salt to Fe in the sieved cobalt-copper white alloy of (1-3):1, adopting stirring equipment for stirring, and obtaining solution after reaction; c, adding strong acid into the solution after reaction, controlling hydrogen ion concentration in the aqueous solution to between 2 and 5 mol/L, controlling the stirring speed to between 300 and 1,000 revolutions per minute, and heating a reactor to control the temperature of the solution to between 70 and 100 DEG C; and d, when the leaching reaction time is 4 to 24 hours until the cobalt percentage in slag is 0.1 to 0.5 percent, adopting solid-liquid separation equipment for solid-liquid filtering separation, obtaining a filter cake and filter liquor after separation, using the filter cake as an auxiliary copper product, directly shifting the filter liquor to the next process, and finishing the leaching technology. The technology for leaching the cobalt-copper white alloy has the advantages of high leaching rate and high metal recovery, and is suitable for scale production.

Description

technical field [0001] The invention relates to a leaching treatment process for cobalt-copper white alloy, which belongs to the field of chemical industry. Background technique [0002] Cobalt-copper white alloy, the main component content is: an alloy containing Co, Cu, Fe and other metals, wherein the medium Co% is between 10%-30%, Cu is between 10%-50%, and Fe is between 10%-50%. , other element content ≤ 20%. Because the cobalt-copper alloy contains high copper and has certain ductility, it is difficult for general mechanical equipment to be broken; and it cannot be dissolved by leaching with commonly used inorganic acids (hydrochloric acid, sulfuric acid, etc.) or leaching with ammonia. Electrolysis in medium can not make it dissolve, and the dissolution rate in aqua regia is also very slow, and the general leaching rate is less than 90%, so that the alloy has poor leaching efficiency and cannot realize large-scale production. [0003] At present, the main leaching p...

AI Technical Summary

Problems solved by technology

Because the cobalt-copper alloy contains high copper and has certain ductility, it is difficult for general mechanical equipment to be broken; and it cannot be dissolved by leaching with commonly used inorganic acids (hydrochloric acid, sulfuric acid, etc.) or leaching with ammonia. Electrolysis in medium can not make it dissolve, and the dissolution rate in aqua regia is also very slow, and the general leaching rate is less than 90%, which makes the alloy very poor in leaching efficiency and cannot achieve large-scale production

[0003] At present, the main leaching process is still acid leaching process, the alloy leaching efficiency is low, the recovery rate of Co and Cu metals is low, and it is difficult to realize the large-scale use of raw materials