A kind of realgar tailing slag stabilization disposal method

A tailings slag and stabilization technology, which is applied in the field of realgar tailings slag stabilization and disposal, can solve the problems of reducing volume increase ratio, insufficient long-term stability of products, slow oxidation rate of arsenic sulfide, etc., and achieves the effect of accelerating dissolution
CN108704239BActive Publication Date: 2020-05-19HUAZHONG UNIV OF SCI & TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
HUAZHONG UNIV OF SCI & TECH
Publication Date
2020-05-19

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Abstract

The invention discloses a stabilized treatment method for realgar tailing residues. The stabilized treatment method for the realgar tailing residues comprises the following steps of (1) crushing the realgar tailing residues, adding water inside, uniformly stirring, and carrying out first-stage microwave treatment under the action of a microwave field at the power ranging from 100W to 300W; (2) adding water and ferrous salt inside, uniformly stirring, feeding air or oxygen, and meanwhile, carrying out second-stage microwave treatment under the action of a microwave field at the power ranging from 300W to 500W; and (3) carrying out third-stage microwave treatment under the action of a microwave field at the power ranging from 500W to 700W, so that the stabilization of the realgar tailing residues is realized. According to the stabilized treatment method for the realgar tailing residues provided by the invention, through designing a whole process technology of the method, especially improving parameters and conditions of a key microwave treatment process, and dissolving, oxidizing and stabilizing the realgar tailing residues for three stages, the problems of slow calcium arsenate dissolution rate, slow arsenic sulfide oxidation rate and insufficient product long-time stability can be effectively solved.
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Description

technical field

[0001] The invention belongs to the technical field related to the disposal of arsenic-containing tailings, and more specifically relates to a method for stabilizing the disposal of realgar tailings slag. Background technique

[0002] Realgar ore is a unique mineral in my country, with the largest reserves in the world. my country has been mining it for 1,500 years. However, due to the backwardness of ore dressing and production technology, a large amount of high-arsenic tailings without any treatment has been left behind, which has become an environmental arsenic. One of the important sources of pollution. The highly toxic arsenic released from realgar tailings has seriously threatened human health through surface water, groundwater, soil and food chain.

[0003] Different from common iron-rich and arsenic solid wastes that mainly contain relatively stable iron-arsenic minerals, realgar tailing slag mainly contains arsenic sulfide (realgar and orpiment) and ...

Claims

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