A method for directly vitrifying arsenic-containing materials containing arsenite

An arsenite, vitrification technology, applied in chemical instruments and methods, solid waste removal, transportation and packaging, etc. Authorized patents and other issues, to achieve the effect of harmless treatment, simple treatment method and wide application range
CN112718793BActive Publication Date: 2022-03-11ZIJIN MINING GROUP +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
ZIJIN MINING GROUP
Publication Date
2022-03-11

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Abstract

The invention discloses a method for directly vitrifying arsenic-containing materials containing arsenite, which comprises the following steps: Precipitating arsenic: adding a pH regulator to the arsenic-containing solution, and precipitating soluble arsenous acid (salt) therein Form separation; Mixing ingredients: Mix the arsenic-containing material containing arsenite and the glass substrate according to the designed mass ratio, then pulverize and grind finely; Preheat treatment: Preheat the mixture at 100-550°C Heat treatment, collect the dust generated during the preheating process and return it to the mixed ingredients; high temperature melting: heat the preheated mixture to 1000-1400°C to melt, collect the dust generated during the high temperature melting process and return it to the mixed ingredients; Cooling: cooling the material obtained by high-temperature melting to form arsenic-containing glass solidified body. The invention not only shortens the technological process, reduces the cost of arsenic fixation, but also realizes the stabilization and harmless disposal of the arsenic-containing waste residue, and reduces the risk of environmental pollution.
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Description

technical field

[0001] The invention relates to the technical field of harmless disposal of hazardous waste, in particular to a method for directly vitrifying arsenic-containing materials containing arsenite. Background technique

[0002] Arsenic is an inherent element that exists widely in nature. Its organic and inorganic compounds have varying degrees of toxicity and are extremely harmful to the environment. Key prevention elements. Arsenic is a sulfur-friendly element and is a common element in sulfide ore resources such as copper, lead, and zinc. In the process of resource development, arsenic enters waste gas, wastewater, and waste residue in different forms. In recent years, the gradual increase of arsenic content in non-ferrous metal ore resources has become a common problem, and with the rapid economic development, the demand for ore raw materials is increasing day by day, so arsenic-containing materials, especially arsenic-containing waste, are also significantly ...

Claims

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