Treatment method of copper anode plate washing slag

Abstract

The invention relates to the technical field of anode plate washing slag treatment, in particular to a treatment method of copper anode plate washing slag. The treatment method comprises the following steps that (A) the copper anode plate washing slag, a sulfuric acid solution and an oxidizing agent are mixed, and acid leaching is carried out to obtain an acid leaching solution; (B) the acid leaching solution is mixed with a cationic polyacrylamide solution, and flocculent precipitation is carried out to obtain an acid leaching clear solution and acid leaching residues; and (C) the acid leaching residues are washed with water, size mixing and screening are carried out to obtain barium sulfate, the acid leaching clear solution is subjected to electrified electrodeposition, and the high-purity cathode copper is obtained. The problem of comprehensive recovery of valuable elements from the anode plate casting water washing slag is solved, a process scheme for oxidizing acid leaching treatment of the water washing slag is creatively provided, the problem of traditional water washing slag furnace returning treatment is solved, the process is different from other wet treatment processes, the process is simple, the flow is short, the equipment requirements are low, and the additional value of a product is enhanced.

Description

technical field [0001] The invention relates to the technical field of processing slag washing of anode plates, in particular to a method for treating slag washing of copper anode plates. Background technique [0002] In order to prevent the anode plate from being bonded to the copper mold and to avoid affecting the surface quality of the anode plate, a layer of release agent is usually applied to the casting mold before the copper smelting anode plate is cast. Barium sulfate has the characteristics of high melting point, stable properties, and no reaction with acid and alkali. In actual production, barium sulfate is usually used with a small amount of water glass as a release agent for copper anode plate casting. After the copper anode plate is cast and demoulded, it is usually cooled in a circulating water pool. Under the cooling effect of cold water, most of the release agent adhering to the anode plate entrains copper-containing materials and falls off from the anode p...

AI Technical Summary

Problems solved by technology

Minor problem with copper recovery and treatment: this process only carries out oxidative acid leaching for medium sand (containing 39% copper), while high-copper coarse sand (containing 79% copper, 9.6% barium sulfate) is still returned to the furnace for treatment, resulting in water washing slag Most of the copper and a small amount of barium sulfate (accounting for 78% of the total copper and 10% of barium sulfate in the washing slag) are not directly recovered, but enter the smelting system for treatment, which has a long process and high cost

High-temperature concentrated acid leaching of copper and barium sulfate on water-washed slag, the main problem of this process is high temperature 200-500 ℃, sulfuric acid concentration 18mol / L, high temperature and high acid working conditions require quite high equipment and consume a lot of energy

A large amount of dilute acid is produced after the acid leaching solution is diluted, and the dilute acid must be treated before it can be discharged, which will inevitably increase the treatment cost