Method for recycling valuable metal from copper smelting white smoke

Abstract

The invention relates to a method for recycling valuable metal from copper smelt white smoke and belongs to the technical field of resource recycling. The method includes the steps that the white smoke collected from a second electric field, a third electric field and a fourth electric field through an electric copper smelting smoke collection device serves as a raw material, a first-level power wave circulating cleaning solution serves as a leaching agent, the liquid-solid mass ratio is 8-10:1, leaching is conducted at the normal temperature, and lead-rich slag with the metal grade larger than 40wt% is obtained; sodium sulfide is added to a leaching solution for fractional precipitation so as to recycle copper and rich arsenic, the metal grade of copper-rich slag is larger than 40wt / %, the content of the arsenic in the arsenic-rich slag is larger than 35 wt%, finally, sodium carbonate is added for zinc precipitation, and the metal grade of the zinc-rich slag is larger than 45 wt / %; the valuable metal mentioned above can be used as raw materials for use or sale after being enriched, stockpiling or landfill requirements can be met after the metal is cured, and the arsenic open stub is formed. By the adoption of the method, circulating acid pickle serves as the leaching agent, the system waste acid treatment amount is reduced, valuable elements in the waste acid can be recycled, leaching operation and precipitation operation are conducted at the normal temperature, operation is convenient, and the method has good application and popularization value.

Description

technical field [0001] The invention relates to the technical field of resource utilization of industrial solid waste, in particular to a method for recovering valuable metals from copper smelting white smoke. Background technique [0002] Copper is one of the basic industrial raw materials for modern economic development. Because of its good electrical and thermal conductivity, tensile and wear resistance, it has been widely used in electric power, machinery manufacturing, transportation, construction, energy, military and other industries. . [0003] Smelting is the most important smelting process of pyrometallurgy copper smelting. The traditional smelting method is carried out in blast furnace, reverberatory furnace and electric furnace. The main disadvantage of this process is that it cannot fully utilize the chemical reaction heat of sulfide oxidation in the charge as energy. Large amount of fuel or electricity consumption; output S0 2 The flue gas concentration is lo...

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Problems solved by technology

[0003] Smelting is the most important smelting process of pyrometallurgy copper smelting. The traditional smelting method is carried out in blast furnace, reverberatory furnace and electric furnace. The main disadvantage of this process is that it cannot fully utilize the chemical reaction heat of sulfide oxidation in the charge as energy. Large amount of fuel or electric energy consumption; output S0 2 The flue gas concentration is low, the production of sulfuric acid is uneconomical, and it is easy to cause serious pollution to the environment

[0017] Extraction and separation of valuable metals from copper smelting soot and dust, there are many research papers and related patent reports, each with its own characteristics, but the exhaust gas is used as acid leaching agent for circulating washing waste acid, high liquid-solid ratio, normal temperature leaching, sodium sulfide copper precipitation Arsenic-rich, sodium carbonate zinc precipitation has not yet been reported

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