A method for preparing arsenic-containing borosilicate glass by treating arsenic solid waste

A borosilicate glass and glass raw material technology, 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, good heat resistance, and low arsenic precipitation

Active Publication Date: 2022-03-15
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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  • A method for preparing arsenic-containing borosilicate glass by treating arsenic solid waste

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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 by treating arsenic solid waste. The arsenic-containing solid waste is prepared into mixed-valent arsenate through a purification process, and mixed-valent arsenate and silicon dioxide are used as main glass raw materials. , after mixing evenly, heat and melt together and then cool and solidify to obtain arsenic-containing borosilicate glass of transparent or milky white glass; in the glass raw material, the content of silicon dioxide is 60-80% by mass fraction, and the content of mixed valence arsenic The content of acid salt is 2-20%. The prepared arsenic-containing borosilicate glass is tested for precipitation according to GB19778-2005 standard, and the precipitation of arsenic is ≤0.02mg / dm 2 ; According to the GB / T5086.1 standard method, the amount of arsenic precipitation is ≤0.24mg / L; the method of the present invention can effectively treat the solid waste of non-ferrous metals, realize recycling, and reduce the impact on the environment, which is more environmentally friendly and low-cost. Moreover, compared with other arsenic-containing borosilicate glasses, the prepared arsenic-containing borosilicate glass has the advantages of transparency, good heat resistance, excellent chemical stability, and extremely low amount of arsenic precipitation.

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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Patent Type & Authority Patents(China)
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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