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Treatment method of arsenic-antimony smoke dust

A treatment method and technology for smoke and dust, applied in the direction of improving process efficiency, etc., can solve the problems of high chemical cost, unfavorable industrialization promotion, and inability to completely separate arsenic and antimony, and achieve the effects of saving chemical costs, reducing processing costs, and completely separating

Pending Publication Date: 2021-11-26
HUNAN RES INST FOR NONFERROUS METALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Since the oxidation-alkali leaching method cannot leach the arsenate in the soot, it cannot completely separate arsenic and antimony; at the same time, it needs to consume 0.2-1 ton of hydrogen peroxide and 1-4 tons of caustic soda to treat one ton of arsenic and antimony soot, and the cost of chemicals is very high. Conducive to the promotion of industrialization

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  • Treatment method of arsenic-antimony smoke dust

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Embodiment 1

[0029] A kind of processing method of arsenic antimony smoke dust of the present invention, its process flow schematic diagram is as figure 1 As shown, the object of processing is the arsenic-antimony smoke dust (the mass content of As is 12.7%, and the mass content of Sb is 44.26%) produced by a gold and silver workshop of a lead smelter, including the following steps:

[0030] (1) Leach arsenic-alkali slag with hot water to obtain arsenic-alkali slag water leaching solution, add arsenic-antimony fume into the arsenic-alkali slag leaching solution, heat up to 100°C, and carry out one-stage oxidation leaching under air stirring conditions for 2 hours, the pH at the end of the reaction The value is 8, and filtrate A and filter residue A are obtained after filtration;

[0031] (2) Add filter residue A to the leaching solution of arsenic-alkali slag, heat up to 95°C, carry out two-stage oxidation leaching for 3 hours under the condition of air stirring and microwave radiation, th...

Embodiment 2

[0035] A method for processing arsenic and antimony fumes of the present invention, the object of treatment is arsenic and antimony fumes (the mass content of As is 23.42%, and the mass content of Sb is 50.41%) produced by a Xigui workshop of a certain lead smelter, comprising the following steps:

[0036] (1) Leach arsenic-alkali slag with hot water to obtain arsenic-alkali slag water leaching solution, add arsenic-antimony fume into the arsenic-alkali slag leaching solution, heat up to 100°C, and carry out one-stage oxidation leaching under air stirring conditions for 2 hours, the pH at the end of the reaction The value is 9, and filtrate A and filter residue A are obtained after filtration;

[0037] (2) Add filter residue A to the leaching solution of arsenic-alkali slag, heat up to 95°C, carry out two-stage oxidation leaching for 3 hours under the condition of air stirring and microwave radiation, the frequency of microwave is 2450MHz, and obtain filtrate B and filter resid...

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Abstract

The invention provides a treatment method of arsenic-antimony smoke dust. The treatment method comprises the following steps that the arsenic-antimony smoke dust is added into an alkaline leaching agent to be subjected to first-stage oxidation leaching, filtering is conducted after leaching, and filtrate A and filter residues A are obtained; the filter residues A are added into the alkaline leaching agent to be subjected to second-stage oxidation leaching, filtering is conducted after leaching is completed, and filtrate B and filter residues B are obtained; the filtrate A is subjected to evaporative crystallization, and sodium arsenate crystals are obtained; and the filter residues B are subjected to high-temperature roasting treatment, and low-arsenic high-antimony cinder is obtained. The treatment method disclosed by the invention is simple to operate, relatively complete separation of arsenic and antimony in the arsenic-antimony smoke dust and zero discharge of wastewater can be realized, high-valence alkali, hydrogen peroxide and other agents which are used in a large amount in a conventional process are saved, the treatment cost is greatly reduced, and the treatment method is suitable for large-scale popularization and application.

Description

technical field [0001] The invention belongs to the technical field of hazardous solid waste treatment, and in particular relates to a treatment method for arsenic, antimony and dust. Background technique [0002] During the pyro-smelting process of lead anode slime, high arsenic and antimony smoke dust is produced, and the arsenic in it is mainly As 2 o 3 The form of arsenic and antimony enters the flue and is enriched in the flue dust. Since arsenic and antimony are elements of the same main group, their physical and chemical properties are relatively similar, and their boiling points are lower. Smoke and dust with high antimony content, the general arsenic content is about 20%-40%, and the antimony content is about 20%-50%. In a general large-scale smelter, the annual output of high-arsenic and antimony fume is more than 800 tons. Arsenic is harmful to the human body and the environment, and antimony is a valuable metal, so this kind of smoke needs to be treated and co...

Claims

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Application Information

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IPC IPC(8): C22B7/02C22B30/04C22B30/02
CPCC22B7/02C22B7/008C22B30/04C22B30/02Y02P10/20
Inventor 陈伟曹柏林
Owner HUNAN RES INST FOR NONFERROUS METALS
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