Method for recovering copper through copper anode mud supersonic pretreatment

Abstract

The invention belongs to the field of wet metallurgy, and specifically relates to a method for recovering copper through a copper anode mud supersonic pretreatment. According to the invention, sulfuric acid with concentration of 50-400g / L is added to copper anode mud, such that slurry is prepared; the copper anode mud slurry is placed in a supersonic wave generator; an oxidant is added into the copper anode mud slurry; supersonic frequency is regulated to 20-40kHz, a power is 500-4000w, and leaching is carried out for 30-90min under normal pressure and a temperature of 20-90 DEG C. With the method, a problem of long leaching time and generally low leaching rate of prior art are overcome. Compared with the leaching rate with no supersonic treatment, the leaching rate is improved by more than 10-30%, and a copper leaching rate reaches 93-99%.

Description

technical field [0001] The invention belongs to the field of hydrometallurgy, and in particular relates to a copper anode slime ultrasonic pretreatment method for recovering copper. Background technique [0002] When copper is electrolytically refined, the copper on the anode and the base metal with negative potential dissolve into the solution under the action of direct current, while the rare precious metal sinks to the bottom of the tank due to its high dissolution potential to become anode slime. The pretreatment of anode slime is to dissociate the non-precious metal elements in the anode slime that will significantly affect the subsequent separation process and be easily separated. This will not only enrich the rare and precious metal elements, but also facilitate the recovery of other valuable elements. Copper occupies a large proportion in copper anode slime, and its presence has a significant impact on the subsequent separation of precious metals, so it needs to be ...

AI Technical Summary

Problems solved by technology

The recovery of sulfur dioxide produced in the roasting process in the pyrotechnic process and the resulting environmental pollution are still a technical problem; while the atmospheric acid leaching copper removal process can not produce sulfur dioxide, but because the reaction temperature of the air oxidation method cannot be very high, the highest It does not exceed 90°C, so the reaction intensity is weak and the reaction time is long. It takes 24 hours or even longer to complete the copper removal task, and the copper removal rate is only about 60~70%.

[0004] In order to solve the problems of slow speed, low efficiency and long time consumption in the process of copper removal by acid leaching under normal pressure, the process of copper removal by high temperature and pressure acid leaching has gradually attracted attention.

The high temperature and pressure method has the advantages of short processing time, large processing capacity, and fast leaching speed, but it also has disadvantages such as high energy consumption and high equipment requirements. While the leaching rate of the target element is increased, the leaching rate of various associated elements is also increased. At the same time, it is not conducive to the recovery of other elements