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Electrochemical treatment method for arsenic-containing anode mud

A treatment method and anode slime technology, which are applied in the field of pollutant treatment, can solve the problems of unsuitable treatment of toxic solid waste, narrow scope of application, and no public treatment of arsenic-containing anode slime, etc., so as to promote oxidation efficiency, improve recovery rate, and facilitate the The effect of subsequent separation

Active Publication Date: 2018-09-25
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the method is only applicable to the treatment of organic pollutants present in the liquid phase, and it requires the use of specific catalysts and auxiliary catalysts, which is not applicable to the treatment of toxic solid waste, so the scope of application is narrow
In addition, it does not disclose that the method can be used to treat anode sludge containing arsenic

Method used

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  • Electrochemical treatment method for arsenic-containing anode mud
  • Electrochemical treatment method for arsenic-containing anode mud

Examples

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Embodiment 1

[0062] An electrochemical treatment method for arsenic-containing anode slime, wherein the arsenic-containing anode slime is arsenic-containing anode slime produced in an electrolysis section of a copper smelting process, comprising the following steps:

[0063] (1) Ingredients: Mix arsenic-containing anode slime sieved into 80 meshes with potassium hydroxide aqueous solution to prepare an electrolyte and preheat to 60°C. The potassium hydroxide content in the potassium hydroxide solution is 1M, and the arsenic-containing anode The liquid-solid ratio of mud and potassium hydroxide solution is 1g / L;

[0064] (2) Electrochemical reaction: Add the raw material electrolyte obtained in step (1) into the atmospheric pressure electrolyzer, pass oxygen into the electrolyte, the oxygen flow rate is 400mL / min, the mechanical stirring rate is 800rpm, and the carbon felt electrode is used as the working electrode , with a carbon rod as the counter electrode, a mercury / mercury oxide electr...

Embodiment 2

[0067] An electrochemical treatment method for arsenic-containing anode slime, wherein the arsenic-containing anode slime is arsenic-containing anode slime produced in an electrolysis section of a copper smelting process, comprising the following steps:

[0068] (1) Mix arsenic-containing anode slime with a sodium hydroxide solution having a concentration of 0.01M, and the solid-to-liquid ratio of the arsenic-containing anode slime to the sodium hydroxide solution is 0.1g / L to obtain a mixture;

[0069] (2) The mixture is placed in an electrolytic cell as an electrolyte, and an electrochemical catalytic oxidation reaction is carried out at 20° C. and a stirring speed of 2100 rpm. During the electrochemical catalytic oxidation process, oxygen-enriched air is introduced into the mixture; Wherein, the time of the electrochemical catalytic oxidation reaction is 2h, the voltage of the electrolytic cell is -0.4V, and the flow rate of the oxygen-enriched air is 100mL / min; the electrol...

Embodiment 3

[0072] An electrochemical treatment method for arsenic-containing anode slime, wherein the arsenic-containing anode slime is arsenic-containing anode slime produced in an electrolysis section of a copper smelting process, comprising the following steps:

[0073] (1) mixing the arsenic-containing anode slime with an alkali solution having a concentration of 10M, the solid-to-liquid ratio of the arsenic-containing anode slime and the alkali solution being 100g / L to obtain a mixture;

[0074] (2) The mixture is placed in an electrolytic cell as an electrolyte, and an electrochemical catalytic oxidation reaction is performed at 140° C. and a stirring speed of 800 rpm, and air is introduced into the mixture during the electrochemical catalytic oxidation process; wherein, The time of the electrochemical catalytic oxidation reaction is 1h, the voltage of the electrolytic cell is-5.0V, and the flow rate of feeding air is 500mL / min; the graphite plate is used as the working electrode in...

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Abstract

The invention provides an electrochemical treatment method for arsenic-containing anode mud. The electrochemical treatment method comprises: (1) mixing an alkali and a solvent or mixing an alkali solution and arsenic-containing anode mud to obtain a mixture; (2) placing the mixture as an electrolyte in an electrochemical reaction device, carrying out an electrochemical reaction, and introducing anoxidizing gas into the electrolyte during the electrochemical reaction; and (3) carrying out solid-liquid separation on the reaction product obtained in the step (2) to obtain the arsenic-containingsolution. According to the present invention, the method has advantages of high extraction rate of arsenic, cleaning property, no pollution, mild process condition, low cost and low requirements on equipment; the impurity is not introduced so as to conveniently perform the subsequent separation; the concentration of the used alkali is low so as to reduce the alkali consumption; and the automationdegree is high so as to reduce the manpower input, the good economic and social benefits can be provided, and the good application prospect can be provided.

Description

technical field [0001] The invention belongs to the technical field of pollutant treatment, and relates to an electrochemical treatment method for arsenic-containing anode slime. Background technique [0002] Arsenic compounds are a class of chemical substances with high toxicity to organisms, and are internationally recognized carcinogens. my country is a country that suffers from arsenic damage very seriously, causing bad social impact. Arsenic is a sulfur-friendly metalloid or semi-metal element, and it mainly exists in the form of sulfide, sulfur arsenide, arsenide and arsenate in natural minerals, and it mainly occurs in non-ferrous metal deposits and is produced as an associated mineral of other metals , enriched during the smelting or manufacturing process, gradually forming highly toxic arsenic-containing solid waste. [0003] Arsenic also has special uses in the fields of agriculture, electronics, medicine, metallurgy, and chemical industry. It can be used to prepa...

Claims

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Application Information

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IPC IPC(8): C25C1/22C25C7/02C22B7/00C22B30/04
CPCC22B7/006C22B30/04C25C1/22C25C7/02Y02P10/20
Inventor 金伟薛玉冬郑诗礼张懿
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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