The invention provides a
recovery and utilization method of valuable
metal sludge containing
copper,
nickel and
cobalt, namely, a combined technology of bacterial leaching aid-centrifugal extraction-
cyclone electrowinning. The method comprises the following steps: A. sequentially mixing and stirring extract
slurry with a
sulfuric acid solution, a
bacteria assisted leaching agent and
hydrogen peroxide, and filtering to obtain filtrate and filter residue; B. centrifugally extracting the filtrate to obtain a high-purity
copper sulfate solution, and carrying out
cyclone electrowinning on the solution to obtain
metal copper; and C. centrifugally extracting a water phase with impurities being removed and copper being extracted to obtain a high-purity
nickel sulfate solution, and carrying out
cyclone electrowinning on the solution to obtain
metal nickel. According to the
recovery and utilization method provided by the invention, the bacterial leaching aid, centrifugal extraction and cyclone electrowinning technologies are integrally operated; compared with the conventional technology of acid leaching-extracting-electrowinning, the
recovery and utilization method has the advantages that the leaching efficiency of the valuable metal
sludge containing copper, nickel and the like is stably improved from generally lower than 90% to higher than 95%, the acid consumption is decreased by more than 3%, the
energy consumption is decreased by more than 10%, the occupation space is decreased by more than 60%, and a new way is provided for clean, efficient and comprehensive utilization of the valuable metal
sludge containing copper, nickel, etc.