Processing method of arsenic-containing material

Abstract

The invention provides a processing method of an arsenic-containing material. The processing method concretely comprises the following steps: sequentially carrying out alkaline leaching and oxidation leaching on the arsenic-containing material, carrying out magnetic separation on an obtained leaching solution, and concentrating slurry obtained by separation to obtain first clear liquid and first underflow; filtering the first underflow to obtain immersion liquid, mixing the immersion liquid and the first clear liquid, and carrying out precipitation to obtain second clear liquid; sequentially acidizing and extracting the second clear liquid to obtain extract liquid containing arsenic acid; carrying out back extraction on the extract liquid containing the arsenic acid with water to obtain the arsenic acid; carrying out reaction on the arsenic acid, aniline and tetrachloroethylene to obtain a reaction mixture; extracting the reaction mixture to obtain upper liquid and lower liquid; rectifying the upper liquid; and carrying out steam distillation on obtained rectification remainders and the lower liquid, hydrolyzing obtained slurry, carrying out cooling crystallization on an obtained reaction product, and filtering to obtain a raw aminophenylarsonic acid product.

Description

technical field [0001] The invention relates to the technical field of copper smelting, in particular to a method for processing arsenic-containing materials. Background technique [0002] The copper smelting industry generally adopts copper smelting technology of smelting, blowing, anode furnace, electrolytic refining and flue gas acid comprehensive recovery. Copper smelting process such as figure 1 As shown, first in the batching process, the copper concentrate and auxiliary materials are batched according to a certain proportion, and then put into the smelting furnace to produce matte; then the matte is put into the blowing furnace to produce blister copper; Arsenic is very easy to volatilize into the flue gas under high temperature conditions, cool and settle together with the soot in the flue, and mix into the soot. A large amount of soot is generally discharged through the lower part of the waste heat steam boiler for centralized recovery, and then returns to the batc...

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Problems solved by technology

[0003] With the increase of arsenic content in imported copper concentrates, the following problems of arsenic have a greater impact on the copper smelting process, production environment and production costs, thus forming more and more challenges to the existing process

[0004] (1) The arsenic-containing soot produced in the smelting and blowing process is returned to the batching process for batching and then put into the smelting furnace, so that arsenic forms a closed loop in the smelting process, which greatly increases the arsenic content in the furnace material, resulting in matte The arsenic content in , blister copper and anode copper all increased significantly, which brought adverse effects on electrolysis and seriously affected the electrolysis process and the quality of cathode copper

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