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

A technology of borosilicate glass and glass raw materials, applied in glass furnace equipment, glass manufacturing equipment, manufacturing tools, etc., can solve problems such as arsenic recovery, achieve the effects of reducing environmental impact, low arsenic precipitation, and excellent chemical stability

Active Publication Date: 2021-06-08
深圳市新能通环境科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The present invention not only solidifies arsenic, but also further effectively utilizes arsenic. The present invention provides a method for making arsenic-containing borosilicate glass from arsenic-containing smelting residues to solve the problem of arsenic recovery in smelting residues

Method used

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

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] A method for preparing arsenic-containing borosilicate glass by treating arsenic solid waste, comprising the steps of:

[0042] (1) Preparation of calcium arsenate and calcium arsenite:

[0043] S1: Alkaline leaching of arsenic-containing non-ferrous metal solid waste (arsenic content 7%) with a sodium hydroxide solution with a mass concentration of 5% at 25°C for 6 hours, and adding hydrogen peroxide with a concentration of 50% for oxidation treatment to obtain soaking liquid;

[0044] S2: Filter the soaking liquid to obtain the transition liquid and insoluble recyclable non-ferrous metal solid waste;

[0045] S3: Add saturated calcium hydroxide solution to the transition liquid, treat at 60°C for 6 hours, and filter to separate the precipitates of calcium arsenate and calcium arsenite and their mixture with sodium hydroxide, and then filter , and recover the precipitate and the sodium hydroxide filtrate.

[0046] The obtained precipitates are calcium arsenate and c...

Embodiment 2

[0050] A method for preparing arsenic-containing borosilicate glass by treating arsenic solid waste, comprising the steps of:

[0051] (1) Preparation of barium arsenate and barium arsenite:

[0052] S1: Alkaline leaching of arsenic-containing non-ferrous metal solid waste (arsenic content 11%) in a sodium hydroxide solution with a mass concentration of 6% at 35°C for 6 hours, and adding 35% hydrogen peroxide for oxidation treatment to obtain a soaking solution ;

[0053] S2: Filter the soaking liquid to obtain the transition liquid and insoluble recyclable non-ferrous metal solid waste;

[0054] S3: Add saturated barium hydroxide solution to the transition liquid, treat at 65°C for 6 hours, and filter to separate the precipitates of barium arsenate and barium arsenite and their mixed solution with sodium hydroxide, and then filter , and recover the precipitate and the sodium hydroxide filtrate.

[0055] The obtained precipitates are barium arsenate and barium arsenite, in ...

Embodiment 3

[0059] A method for preparing arsenic-containing borosilicate glass by treating arsenic solid waste, comprising the steps of:

[0060] (1) Preparation of calcium arsenate and calcium arsenite:

[0061] S1: Alkaline leaching of arsenic-containing non-ferrous metal solid waste (arsenic content 13%) with a sodium hydroxide solution with a mass concentration of 9% at 45°C for 3 hours, and adding 10% hydrogen peroxide for oxidation treatment to obtain a soaking solution ;

[0062] S2: Filter the soaking liquid to obtain the transition liquid and insoluble recyclable non-ferrous metal solid waste;

[0063] S3: Add saturated calcium hydroxide solution to the transition liquid, treat at 68°C for 3 hours, and filter to separate the precipitates of calcium arsenate and calcium arsenite and their mixture with sodium hydroxide, and then filter , and recover the precipitate and the sodium hydroxide filtrate.

[0064] The obtained precipitates are calcium arsenate and calcium arsenite, i...

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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,...

Claims

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Application Information

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IPC IPC(8): C03C3/091C03C1/02C03B25/00C03B5/16C03B1/00
CPCC03C3/091C03C1/002C03B5/16C03B1/00C03B25/00
Inventor 李清湘汪庆卫张旭罗理达马畅乔涛
Owner 深圳市新能通环境科技有限公司
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