Method for treating copper and arsenic containing filter

A filter cake and content technology, which is applied in the field of copper and arsenic filter cake treatment, can solve the problems of high roasting temperature, long process flow, and no copper extraction, achieve efficient removal, realize comprehensive recycling, and be conducive to popularization and application Effect

Inactive Publication Date: 2020-07-03
TONGREN UNIV
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Problems solved by technology

The problem of fire treatment is that the calcination temperature is high (500-800 ℃), and the copper is not extracted.
The problem of wet treatment is: the process is long, and new pollutants (arsenic-containing wastewater) are generated, which need to be treated

Method used

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  • Method for treating copper and arsenic containing filter

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Embodiment Construction

[0013] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention.

[0014] refer to figure 1 , a method for processing a copper-arsenic filter cake, comprising the steps of:

[0015] S1: Select the copper-arsenic filter cake, fully slurry the copper-arsenic filter cake with concentrated sulfuric acid for 0.5-1h, and oxidize and roast the slurried copper-arsenic filter cake. 0.5-1h, condense and recover the soot in the oxidation roasting process. During the oxidation roasting process, the arsenic in the copper arsenic filter cake volatilizes into the soot in the form of arsenic trioxide, that is, the arsenic trioxide product is obtained after the condensation recovery, and the arsenic trioxide product is obtained after the oxidation r...

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Abstract

The invention discloses a method for treating a copper and arsenic containing filter cake. The method comprises the following steps of selecting the copper and arsenic containing filter cake, performing slurrying on the copper and arsenic containing filter cake and concentrated sulfuric acid, performing oxidizing roasting on the slurried copper and arsenic containing filter cake, carrying out condensation recovery on soot generated in oxidizing roasting, during the oxidizing roasting process, volatilizing arsenic in the copper and arsenic containing filter cake into the soot in the form of arsenic trioxide, that is, obtaining an arsenic trioxide product after condensation recovery, and obtaining roasted slag after oxidizing roasting; and performing sulfuric acid leaching treatment on the obtained roasted slag with a sulfuric acid solution, leaching copper in the roasted slag in the solution in a form of copper sulfate during the sulfuric acid leaching treatment process, and completingthe sulfuric acid leaching treatment to obtain leaching residue and a copper sulfate solution, that is, completing the treatment of the copper and arsenic containing filter. The method is simple to operate and convenient to implement, can realize the efficient removal and comprehensive recycling of the arsenic in the copper and arsenic containing filter cake, does not cause secondary pollution tothe environment, and is beneficial to popularization and application.

Description

technical field [0001] The invention relates to the technical field of treating filter cakes containing copper and arsenic, in particular to a method for processing filter cakes containing copper and arsenic. Background technique [0002] Copper-arsenic filter cake is produced in the process of removing arsenic from copper smelting. The arsenic sulfide content in the arsenic-containing copper filter cake can reach 30-70%, and the copper content is 3-5%. Copper and arsenic filter cakes are mainly processed by stockpiling. The arsenic in arsenic-containing copper filter cakes is unstable and is easily dissolved in acidic and alkaline environments. Therefore, it is of great significance to adopt appropriate methods to deal with the arsenic filter cake and to recycle the arsenic and copper in the arsenic filter cake. At present, the research on resource utilization of copper and arsenic filter cake mainly includes: fire treatment method and wet treatment method. The fire treat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B1/02C22B15/00C22B30/04C01G28/00
CPCC01G28/005C01P2006/80C22B1/02C22B7/007C22B15/0071C22B30/04Y02P10/20
Inventor 李学鹏王娟常军王子阳
Owner TONGREN UNIV
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