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Method for producing glass-ceramic from waste glass

A technology for waste glass and glass-ceramic, applied in the field of industrial waste treatment, can solve the problems of difficult separation of iron-containing cobalt slag, complicated leaching process, corrosive reagents, etc. effect of value

Active Publication Date: 2012-03-14
GEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this kind of sulfuric acid leaching method has the disadvantages of complex leaching process, many procedures, corrosive reagents, and difficult separation of iron and cobalt slag.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The invention provides a method for producing glass-ceramics from waste glass, comprising the following steps:

[0034] (1) Take waste glass, its main component is: SiO 2 70%, Al 2 o 3 1.2%, CaO 7%, K 2 O 0.6% and Na 2 O 14%. The waste glass is selected, cleaned and crushed into glass powder.

[0035] (2) Take cobalt slag, containing (by weight fraction ratio): Zn 10%, Cu 1%, Co 0.2% and Ni 1%, and cobalt slag is broken into cobalt slag powder.

[0036] (3) Waste glass, cobalt slag, TiO 2 , limestone and alumina are mixed in a weight ratio of 30:10:1:7:7 to prepare a glass mixed raw material.

[0037] (4) Melt the mixed raw materials in step (3) at 1200°C for 5 hours to obtain molten glass; add sodium nitrate, sodium carbonate and antimony oxide in a weight ratio of 2% to the molten glass, mix, and melt the molten glass Pour into a mold for molding, anneal the shaped glass at 500°C for 1 hour, then cool to room temperature with the furnace; then heat-treat at 70...

Embodiment 2

[0040] The invention provides a method for producing glass-ceramics from waste glass, comprising the following steps:

[0041] (1) Take waste glass, its main component is: SiO 2 75%, Al 2 o 3 0.8%, CaO 13%, K 2 O 0.6% and Na 2 O 10%. The waste glass is selected, cleaned and crushed into glass powder.

[0042] (2) Take cobalt slag, containing (by weight fraction): Zn 35%, Cu 3%, Co 3% and Ni 1%. Crushing the cobalt slag into cobalt slag powder.

[0043] (3) Waste glass, cobalt slag, TiO 2 , limestone and aluminum hydroxide are mixed in a weight ratio of 50:20:1:8:8 to prepare a glass mixed raw material.

[0044] (4) Melt the mixed raw materials in step (3) at 1300°C for 4 hours to obtain molten glass; add sodium nitrate, sodium carbonate and antimony oxide in a weight ratio of 3% to the molten glass, mix, and melt the molten glass Pour into a mold for molding, anneal the shaped glass at 550°C for 0.5h, then cool to room temperature with the furnace; then heat-treat a...

Embodiment 3

[0047] The invention provides a method for producing glass-ceramics from waste glass, comprising the following steps:

[0048] (1) Take waste glass, its main component is: SiO 2 80%, Al 2 o 3 1.0%, CaO 8%, K 2 O 0.4% and Na 2 O 10%. The waste glass is selected, cleaned and crushed into glass powder.

[0049] (2) Take cobalt slag, containing (by weight fraction ratio): Zn 20%, Cu 2%, Co 1% and Ni 1%. Crushing the cobalt slag into cobalt slag powder.

[0050] (3) Waste glass, cobalt slag, TiO 2 , limestone, aluminum oxide and sodium oxide are mixed in a weight ratio of 20:10:1:2:1:1 to prepare a glass mixed raw material.

[0051] (4) Melt the mixed raw materials in step (3) at 1350°C for 4 hours to obtain molten glass; add sodium nitrate, sodium carbonate and antimony oxide in a weight ratio of 5% to the molten glass, mix, and melt the molten glass Pour into a mold for molding, anneal the shaped glass at 550°C for 0.5h, then cool to room temperature with the furnace; ...

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Abstract

The invention discloses a method for producing glass-ceramic from waste glass. The method comprises steps that: (1) waste glass is finely selected, washed and crushed, such that glass powder is prepared; (2) cobalt slag is crushed, such that cobalt slag powder is prepared; (3) the glass powder and the cobalt slag powder are mixed; a crystal nucleus agent and an auxiliary agent are added to the mixture, and the mixture is well mixed, such that a mixed raw material is obtained; (4) the mixed raw material is fused under a high temperature, such that a fused glass liquid is obtained; the fused glass liquid is clarified, homogenized, and molded; the molded glass is annealed, and is processed through heat treatment; the glass is nucleated and crystallized, such that the glass-ceramic is prepared. With the method provided by the invention, harmful effects of waste glass and cobalt slag to the environment can be reduced or eliminated, and wastes are turned into valuable natters. Cobalt slag serves as a main auxiliary material, and is added into waste glass with other auxiliary agents, such that high-grade glass-ceramic is produced. Therefore, great social and economic benefits are broughtin.

Description

technical field [0001] The invention relates to the treatment of industrial waste, in particular to a method for producing glass-ceramics from waste glass. Background technique [0002] Due to different uses, waste glass usually contains oxides such as aluminum, calcium, sodium, and boron in addition to silicon dioxide, and it is difficult to purify. Therefore, the general mode of treatment is to make low-grade, low-value glass products. What's more, waste glass is directly stacked in the open air or landfilled, occupying a large amount of cultivated land, which not only seriously pollutes the environment, but also wastes precious resources. [0003] Cobalt slag, which belongs to the waste produced in the industrial metal smelting process, is formed by the enrichment of cobalt metal residue in the slag. If it is not processed and recycled, it will eventually be lost with the spoil. The current treatment methods for cobalt slag include various pyrometallurgical methods, in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C10/14C03C6/10
Inventor 张翔许开华王珍萍
Owner GEM CO LTD
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