Method for recovering cobalt from cobalt alloy acid leaching liquid

The invention belongs to the field of secondary resource recovery and relates to a method for recovering cobalt from cobalt alloy acid leaching liquid. The method for recovering the cobalt from the cobalt alloy acid leaching liquid includes the steps that a mixture of the cobalt alloy acid leaching liquid and a cobalt-containing waste material is subjected to a dissolution reaction under the acidic condition, the main components of the cobalt alloy acid leaching liquid are Co2+ and Fe2+, the cobalt alloy acid leaching liquid is acidic, and the cobalt-containing waste material contains the maincomponent of Co(OH)2 and further contains a small quantity of Co3+ and Fe; and then a product obtained by the dissolution reaction is subjected to an oxidation-reduction reaction, sedimentation iron-removal and filtering in sequence, and then soluble divalent cobalt salt is obtained. The specific cobalt-containing waste material which contains the main component of Co(OH)2 and a small quantity ofCo3+ and Fe is skillfully