HARMLESS COMPREHENSIVE TREATMENT METHOD FOR CYANIDE TAILING PULP

摘要

A harmless comprehensive treatment method for a cyanide tailing pulp, consisting of three steps: pulp concentration, a cyanide-reducing pre-treatment and oxidation; for the pulp concentration: a concentration of the pulp is increased to 50% by using a thickening device, the thickened supernatant is reused in concentration plant technology, wherein in the thickening device a solid-liquid separation is performed by gravitational sedimentation; for the cyanide-reducing pre-treatment: a cyanide-reducing agent is added into the concentrated pulp; for the oxidation: the oxidation is implemented by a commonly used oxidation method, and meanwhile, activated carbon is added at the oxidation stage. Useful cyanides are recovered using the concentrating treatment, reducing the load of a subsequent treatment; the cyanide-reducing pre-treatment reduces the cyanide load for the oxidation, fixes cyanides which are difficult to oxidize, such as iron cyanide and so on, thus saving the oxidant; the pulp can easily reach the standard during the oxidation treatment, and is stable; and the tailing slag which reaches the standard by processing is a common solid waste.