Method for preparing arsenic-containing borosilicate glass through arsenic solid waste treatment

Abstract

The invention relates to a method for preparing arsenic-containing borosilicate glass through arsenic solid waste treatment. The method comprises the following steps: preparing arsenic-containing solid waste into mixed valence arsenate through a purification process, uniformly mixing the mixed valence arsenate and silicon dioxide as main glass raw materials, heating and melting uniformly, and cooling and curing to obtain transparent or milk white arsenic-containing borosilicate glass. The glass comprises the following raw materials in percentage by mass: 60-80% of silicon dioxide and 2-20% of mixed valence arsenate. When the precipitation amount of the prepared arsenic-containing borosilicate glass is detected according to the GB19778-2005 standard, the arsenic precipitation amount is less than or equal to 0.02 mg / dm < 2 >; and the arsenic precipitation amount is detected to be less than or equal to 0.24 mg / L according to a GB / T5086.1 standard method. According to the method, solid waste of nonferrous metal can be effectively treated, recycling is achieved, influence on the environment is reduced, the method is more environmentally friendly and low in cost, and compared with other arsenic-containing borosilicate glass, the prepared arsenic-containing borosilicate glass has the advantages of being transparent, high in heat resistance, excellent in chemical stability and extremely low in arsenic precipitation amount.

Description

technical field

[0001] The invention belongs to the technical field of arsenic-containing solid waste treatment, and relates to a method for preparing arsenic-containing borosilicate glass by treating arsenic solid waste. Background technique

[0002] A large amount of arsenic-containing residues are produced in mining, smelting, and chemical processes. Only the ferrous metal industry in my country produces more than 3 million tons of arsenic slag per year. It turns out that arsenic can be recycled as As 2 o 3 It is used as a glass clarifier to remove air bubbles. Based on its toxicity, sodium antimonate has been used as a glass clarifier. Therefore, most of the arsenic-containing residues currently produced are disposed of by stacking or simply solidifying landfill, which has great environmental impact. risk, but also caused a waste of arsenic resources. At present, there is almost no way out for arsenic in the smelting industry except as metal arsenic products. However,...

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