Copper soot smelting and separation combined treatment method

Abstract

The invention discloses a copper soot smelting and separation combined treatment method. Copper soot is leached in water solution after ball milling to a requested particle size; sodium sulfide is added to control the metal ion mixed potential of whole pulp at a requested numerical value; meanwhile, sulfuric acid is added to adjust the pH value of the pulp to keep at a requested numerical value; after the solution potential is stabilized, and the stirring is continued by a period of time, the filtration is performed; the leaching liquid controls the metal ion mixed potential and the pH value; arsenic sulfide and zinc sulfide precipitates are respectively prepared to send to waste water for treatment; and leaching slag directly performs flotation to prepare copper concentrate and flotation tailing after alkaline ball milling conversion. The method recovers valuable metal step by step by using a control potential vulcanization leaching and beneficiation combined method; the processes are tightly associated; and single process cannot achieve the desired effect of selection and separation of the valuable metal in copper soot. The leaching rates of arsenic and zinc both reach above 95.0%; and the direct recovery rate of copper reaches above 98.0%.

Description

technical field [0001] The invention relates to a hydrometallurgical process in the field of nonferrous metallurgy, in particular to a hydrometallurgical method for step-by-step separation of valuable metals in copper fume by means of a combination of potential-controlled sulfidation leaching and ore dressing. Background technique [0002] Copper is a rose-red heavy non-ferrous metal. Its excellent physical and chemical properties are widely used in various fields such as electrical, national defense, light industry, machinery manufacturing and construction. It is second only to aluminum in the consumption of non-ferrous metal materials in my country. . At present, the general use ratio of copper is as follows: 48-49% in the electrical industry, 19-20% in the communication industry, 14-16% in construction, 7-10% in transportation, and 7-9% in home appliances and others. In 2014, the output of ten non-ferrous metals in my country was 44.17 million tons, including 24.38 millio...

AI Technical Summary

Problems solved by technology

[0006] Comparing these copper soot treatment processes comprehensively, the pyrotechnic process has been gradually replaced due to the influence of the operating environment and environmental pollution, and the combined pyrotechnic-wet process has gradually become the main body of the existing treatment process, but the process is long and the energy consumption is high. It is also transitioning to the wet process. The wet process has been applied industrially, but the existing process still has problems such as difficulty in As damage treatment, incompleteness, high equipment requirements, and low economic benefits.

Images