The method for treating waste lead-containing glass through melting method and preparing glass ceramics

A technology of glass-ceramics and melting method, which is applied in the field of processing and preparation of glass-ceramics, can solve the problems of restricting product application, affecting product performance, wasting resources, etc., to reduce lead content, improve product performance, save energy and reduce emissions The effect of energy consumption

Active Publication Date: 2017-04-26
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This not only wastes precious resources, but lead into the product still causes potential threats and affects product performance, limiting the application of the product

Method used

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  • The method for treating waste lead-containing glass through melting method and preparing glass ceramics

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Experimental program
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Effect test

Embodiment 1

[0027] A method for processing waste lead-containing glass and preparing glass-ceramic by melting method, the process flow chart is as follows figure 1 shown, including the following steps:

[0028] (1) Crush fly ash, waste leaded glass, dolomite and coke to 0.2mm respectively;

[0029] (2) Taking the total mass of fly ash, waste lead-containing glass, composition regulator, and nucleating agent as 100%, according to fly ash 45%, lead-containing glass 35%, dolomite 14%, nucleation TiO 2 6%, and m (coke) / m (waste leaded glass) = 1.2% ingredients, mixed evenly, the chemical composition of the mixture according to the mass percentage is: SiO 2 38.1%, Al 2 o 3 15.8%, MgO 16.9%, R 2 O 5.1%, CaO 4.7%, Fe 2 o 3 3.4%, TiO 2 5.8%, PbO 8.6%, of which R 2 O for K 2 O and Na 2 O;

[0030] (3) Melt the mixed material at 1500°C for 2.5 hours, and separate the lower layer of crude lead to obtain the upper layer of molten glass;

[0031] (4) Put the upper layer of molten gl...

Embodiment 2

[0034] A method for processing waste lead-containing glass and preparing glass-ceramic by melting method, the process flow chart is as follows figure 1 shown, including the following steps:

[0035] (1) Crush fly ash, waste leaded glass, dolomite and coke to 0.074mm respectively;

[0036] (2) Taking the total mass of fly ash, waste lead-containing glass, composition modifier, and nucleating agent as 100%, according to fly ash 35%, lead-containing glass 40%, dolomite 12%, feldspar 5%, nucleating agent TiO 2 8%, and m (coke) / m (waste leaded glass) = 1.5% ingredients, mixed evenly, the chemical composition of the mixture according to the mass percentage is: SiO 2 39.3%, Al 2 o 3 15.5%, MgO15.4%, R 2O 5.5%, CaO 4.1%, Fe 2 o 3 3.0%, TiO 2 7.7%, PbO 9.4%, of which R 2 O for K 2 O and Na 2 O;

[0037] (3) Melt the mixed material at 1400°C for 3 hours, separate the lower layer of crude lead and obtain the upper layer of molten glass;

[0038] (4) Put the upper layer...

Embodiment 3

[0041] A method for processing waste lead-containing glass and preparing glass-ceramic by melting method, the process flow chart is as follows figure 1 shown, including the following steps:

[0042] (1) Crush fly ash, magnesite slag, waste lead-containing glass, dolomite and coke to 0.1mm respectively;

[0043] (2) Taking the total mass of fly ash, magnesite slag, waste lead-containing glass, composition regulator, and nucleating agent as 100%, according to fly ash 20%, magnesite slag 20%, and lead-containing glass 100% 35%, dolomite 5%, feldspar 10%, nucleating agent TiO 2 10%, and m (coke) / m (waste lead-containing glass) = 1.3% ingredients, mixed evenly, the chemical composition of the mixture according to the mass percentage is: SiO 2 36.1%, Al 2 o 3 15.2%, MgO 18.2%, R 2 O 4.1%, CaO 3.5%, Fe 2 o 3 4.0%, TiO 2 9.6%, PbO8.6%, of which R 2 O for K 2 O and Na 2 O;

[0044] (3) Melting the mixed material at 1550°C for 2 hours, separating the lower layer of cru...

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Abstract

The invention provides a method for treating waste lead-containing glass through a melting method and preparing glass ceramics. The method comprises the following steps that industrial waste residues and waste lead-containing glass are crushed to be 0.074-0.5 mm; the industrial waste residues, the waste lead-containing glass, a component modifier, a nucleating agent and coke are mixed to be uniform; the mixed materials are smelted for 2-3 h at the temperature of 1,400-1,600 DEG C, lower layer crude lead is separated out, and upper layer molten glass is obtained; the upper layer molten glass is subjected to annealing, nucleation and crystallization in sequence, cooling is conducted, and the glass ceramics is obtained. According to the method, the industrial waste residues and the waste lead-containing glass are converted into a high added-value product, lead pollution of lead-containing glass is eliminated fundamentally, the lead resource is utilized, and the good environmental benefit, economic benefit and social benefit are achieved.

Description

technical field [0001] The invention relates to the treatment of waste lead-containing glass and the preparation method of glass-ceramic, in particular to a method for treating waste lead-containing glass by melting method and preparing glass-ceramic. Background technique [0002] Because leaded glass can effectively absorb X-rays, it is widely used in the production of cathode ray tubes (Cathode Ray Tube, referred to as CRT). With the rapid development of display technology, more and more cathode ray tube displays have been eliminated, resulting in a large number of discarded CRTs. There is a huge amount of scrapped CRTs in my country every year, and a large number of waste CRTs are transshipped from developed countries to my country through illegal channels. The disposal of waste CRTs has become one of the important issues in the disposal of electronic waste in my country. The cone glass in the CRT contains as much as 20-25% lead. If the discarded CRT is placed randomly, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C10/00C03C6/10C03C6/02C03C1/02C03B32/02C03C3/105
CPCC03B32/02C03C1/002C03C1/02C03C3/105C03C10/00
Inventor 金哲男杨洪英吕建芳佟琳琳张勤张德胜宋言
Owner NORTHEASTERN UNIV
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