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Non-noxious treatment method for waste electronic lead-containing glass

A technology of harmless treatment and glass, applied in the direction of improving process efficiency, can solve problems such as lead pollution of lead-containing glass, and achieve the effects of short smelting cycle, low industrial cost and large processing capacity

Active Publication Date: 2015-12-02
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problems existing in the prior art, the present invention provides a harmless treatment method for waste electronic lead-containing glass. The method of the present invention uses the pyrometallurgy process to simply crush the waste lead-containing glass and add it to the lead smelting enterprise Add anthracite to the molten low-lead slag produced to reduce the lead in lead-containing glass, and obtain metal lead and reduced slag with a lead content of less than 2%, which fundamentally solves the problem of lead-containing glass lead pollution

Method used

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  • Non-noxious treatment method for waste electronic lead-containing glass

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Effect test

Embodiment 1

[0031] Break the waste electronic lead-containing glass and anthracite to 0.074~0.5mm respectively, mix them evenly, and add them to the molten low-lead slag melt, wherein the low-lead slag is 200g, the waste electronic lead-containing glass is 20g, and the amount of anthracite is 200g. 1.5 times the molar amount of lead oxide in electronic lead-containing glass; melting the mixed material at 1200°C for 1.0h to obtain crude lead and reducing slag.

[0032] After analysis, the crude lead content is 98.26%, the lead content in the reduction slag is 1.47%, and the recovery rate of lead is 92.71%.

Embodiment 2

[0034] Crush the waste electronic lead-containing glass and anthracite to 0.074~0.5mm respectively, mix them evenly, and add them to the molten low-lead slag melt, wherein the low-lead slag is 200g, the waste electronic lead-containing glass is 40g, and the amount of anthracite is waste 1.2 times the molar amount of lead oxide in electronic lead-containing glass; melting the mixed material at 1250°C for 0.8h to obtain crude lead and reducing slag.

[0035] After analysis, the crude lead content is 98.55%, the lead content in the reduction slag is 1.35%, and the recovery rate of lead is 93.33%.

Embodiment 3

[0037] Break the waste electronic lead-containing glass and anthracite to 0.074~0.5mm respectively, mix them evenly, and add them to the molten low-lead slag melt, wherein the low-lead slag is 200g, the waste electronic lead-containing glass is 20g, and the amount of anthracite is 200g. 1.0 times the molar amount of lead oxide in electronic lead-containing glass; melting the mixed material at 1250°C for 0.5h to obtain crude lead and reducing slag.

[0038] After analysis, the crude lead content is 98.23%, the lead content in the reduction slag is 1.25%, and the recovery rate of lead is 94.01%.

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Abstract

The invention provides a non-noxious treatment method for waste electronic lead-containing glass. The non-noxious treatment method comprises the following process steps: respectively crushing the waste electronic lead-containing glass and anthracite to 0.074-0.5mm, uniformly mixing the waste electronic lead-containing glass and the anthracite to obtain a material mixture, and adding the material mixture into molten low-lead slag melt; and smelting the material mixture for 0.5-1.0 hour at a temperature of 1200-1250 DEG C, thereby obtaining crude lead and reducing slag. The method disclosed by the invention is adopted to treat the lead-containing glass, so that the purity of the crude read is higher than 98%, the lead content of the reducing slag is lower than 2%, and the recovery rate of the lead is higher than 90%. The non-noxious treatment method has the characteristics of being flexible in technology and simple in process, and can sufficiently utilize sensible heat of the molten low-lead slag to realize effective utilization of heat energy while resources are saved; and the non-noxious treatment method is relatively low in industrial cost, and beneficial for enterprises to apply the technology to a simultaneous treatment process of the waste electronic lead-containing glass and the waste lead slag.

Description

technical field [0001] The invention relates to an industrial waste recovery treatment method, in particular to a harmless treatment method for waste electronic lead-containing glass. Background technique [0002] Leaded glass is widely used in the production of cathode ray tubes (CathodeRayTube, hereinafter referred to as CRT) for monitors and televisions. With the continuous improvement of people's living standards, the demand for display products is increasing and the replacement speed is accelerating, causing a large number of cathode ray tubes to enter the scrapping stage and become an important part of electronic waste. Since 2006, more than 10 million discarded TV sets and other CRT devices (such as personal computers) have been eliminated in my country every year. Calculated based on the average lead content of 0.9-1.6 kg per CRT monitor, the waste lead entering the environment with lead-containing glass every year Up to 0.9~16,000 tons. In addition, a large number ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B13/02C22B7/00
CPCY02P10/20
Inventor 金哲男吕建芳杨洪英种煜佟琳琳杨坤陈国宝范有静
Owner NORTHEASTERN UNIV
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