Combined treatment process of copper smelting electric dust acid leaching solution and arsenic sulfide slag

Abstract

The invention provides a combined treatment process of a copper smelting electric dust acid leaching solution and arsenic sulfide slag. The process comprises the following process steps that the arsenic sulfide slag is subjected to copper smelting electric dust acid leaching liquid blending, and replacement to obtain an after-replacement solution and the copper sulfide slag, the copper sulfide slag returns to a copper smelting system for treatment, the after-replacement solution is subjected to vulcanization to obtain the arsenic sulfide slag and a vulcanized solution, the arsenic sulfide slagis subjected to two-stage roasting and furnace gas collecting arsenic to produce arsenic trioxide products for selling, after the vulcanized solution is subjected to oxidation iron removal and zinc extraction, the iron slag is produced for selling, and the after-neutralizing solution returns to a production system for reuse after the hardness removal, and zinc slag is subjected to sulfuric acid leaching and electrodeposition process to produce zinc ingots. According to the process, the process flow is simple, indexes are easy to control, the closed cycle is realized, no three wastes are discharged, the arsenic in the treated vulcanized liquid is less than 0.15 mg / L, the copper in the treated vulcanized liquid is less than 0.01 mg / L, the treatment problem of the arsenic sulfide slag can beeffectively solved, and resource treatment of arsenic, copper, iron and zinc is realized so as to realize using waste to treat waste.

Description

technical field [0001] The invention belongs to the technical field of non-ferrous smelting, and in particular relates to a joint treatment process of copper smelting electric dust ash acid leaching solution and arsenic sulfide slag. Background technique [0002] The copper smelting industry has always played an important role in the national economy. Copper pyrometallurgy has always been the main treatment method for copper smelting because of its high metal recovery rate and environmental protection. However, with the increasingly poor copper resources, complex and difficult raw materials More and more, resulting in complex components of electric dust generated in the smelting process. Due to the continuous improvement of environmental protection requirements in recent years, the treatment of smelting electric dust has always restricted the development of the copper smelting industry. At present, there are mainly two ways to deal with electric dust ash. One is to use pyrot...

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Problems solved by technology

[0002] The copper smelting industry has always played an important role in the national economy. Copper pyrometallurgy has always been the main treatment method for copper smelting because of its high metal recovery rate and environmental protection. However, with the increasingly poor copper resources, complex and difficult raw materials More and more, resulting in complex components of the electric dust ash produced in the smelting process. Due to the continuous improvement of environmental protection requirements in recent years, the treatment of smelting electric dust has always restricted the development of the copper smelting industry

At present, there are mainly two ways to deal with electric dust ash. One is to use pyrotechnic treatment. For example, most enterprises currently use direct return to the smelting system. Affecting the quality of electrolytic copper, arsenic will also affect the service life of acid-making catalysts, thereby reducing the conversion rate of sulfur dioxide and the quality of sulfuric acid products; Valence metals, because the wet treatment process can realize the open circuit of impurity metal elements and make them be disposed of as resources, which has been recognized by the industry, but there are problems of complicated and costly subsequent metal separation and extraction processes

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