Method for treating waste CRT (cathode ray tube) and preparing glass ceramics by using slag

A glass-ceramic and slag technology, which is applied in the field of comprehensive utilization of resources, can solve the problem of little research on the consolidation effect of heavy metal ions, and achieve the effects of saving energy consumption for melting, reducing costs, and saving energy and emission reduction costs.

Inactive Publication Date: 2014-06-04
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In these studies, there is no method to avoid the high-energy melting of glass raw materials, and there are few studies on the effect of heavy metal ions on the consolidation.

Method used

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  • Method for treating waste CRT (cathode ray tube) and preparing glass ceramics by using slag
  • Method for treating waste CRT (cathode ray tube) and preparing glass ceramics by using slag

Examples

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Effect test

Embodiment 1

[0021] Such as figure 1 As shown, the embodiment of the present invention: use molten slag to process waste CRT and adopt sintering method to prepare glass-ceramic, its specific process is as follows: waste CRT is carried out grinding, pass 200 mesh sieves, then according to the ratio that accounts for 25% of total raw material It is added to the blast furnace slag discharged from a steel plant, and after the slag is mixed, it is quickly water-quenched at a temperature of 1450°C. Grinding after drying, and passing through a 200-mesh sieve to obtain basic glass frit.

[0022] The powdery basic glass frit is pressed into blocks according to the required volume at a pressure of 10MPa, and put into a heating furnace for processing. The heat treatment system is: nucleation temperature 800°C, nucleation heating rate 10°C / min, nucleation holding time 1h, the crystallization temperature is 850°C, the crystallization heating rate is 4°C / min, the crystallization holding time is 1h, the...

Embodiment 2

[0024] Such as figure 1 As shown, the embodiment of the present invention: use molten slag to process waste CRT and adopt sintering method to prepare glass-ceramic, its specific process is as follows: waste CRT is carried out grinding, pass 200 mesh sieves, then according to the ratio that accounts for 35% of total raw material It is added to the blast furnace slag discharged from a steel plant, and after the slag is mixed, it is quickly water-quenched at a temperature of 1500°C. Grinding after drying, and passing through a 200-mesh sieve to obtain basic glass frit.

[0025] The powdery basic glass frit is pressed into blocks according to the required volume at a pressure of 10MPa, and put into a heating furnace for processing. The heat treatment system is: nucleation temperature 780°C, nucleation heating rate 10°C / min, nucleation holding time 1h, the crystallization temperature is 870°C, the crystallization heating rate is 4°C / min, the crystallization holding time is 1h, the...

Embodiment 3

[0027] Such as figure 1 As shown, the embodiment of the present invention: use molten slag to process waste CRT and adopt sintering method to prepare glass-ceramic, its specific process is as follows: waste CRT is carried out grinding, pass 200 mesh sieves, then according to the ratio that accounts for 45% of total raw material It is added to the blast furnace slag discharged from a steel plant, and after the slag is mixed, it is quickly water-quenched at a temperature of 1400°C. Grinding after drying, and passing through a 200-mesh sieve to obtain basic glass frit.

[0028] The powdery basic glass frit is pressed into blocks according to the required volume at a pressure of 10MPa, and put into a heating furnace for processing. The heat treatment system is: nucleation temperature 800°C, nucleation heating rate 10°C / min, nucleation holding time 1h, the crystallization temperature is 850°C, the crystallization heating rate is 4°C / min, the crystallization holding time is 1h, the...

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Abstract

The invention provides a method for treating waste CRT (cathode ray tube) and preparing glass ceramics by using slag, belonging to the field of comprehensive utilization of resources. The full name of CRT is Cathode Ray Tube, namely cathode ray tube. The method disclosed by the invention comprises the main process as follows: prepared waste CRT powder is synchronously added into the slag in proportion in the process of high-temperature metallurgical slag discharge, and the blended slag is further used as a material for preparing the glass ceramics. According to the method disclosed by the invention, the heat of the slag is directly utilized, a large amount of waste CRT can be treated, heavy metal ions in the slag can be solidified, and a product with a high additional value can be prepared, so that the method has good economic and social benefits and is suitable for large-scale application in industrial production.

Description

technical field [0001] The invention relates to the field of comprehensive utilization of resources, in particular to a method for treating waste CRT with molten slag and preparing glass-ceramics, which is an energy-saving and environment-friendly method for recovering sensible heat from slag and consolidating heavy metal ions in CRT. Background technique [0002] In recent years, my country has gradually become a major producer and consumer of cathode ray tubes (Cathode Ray Tube, referred to as CRT). Because waste CRT contains many heavy metal ions that are difficult to recycle, a large amount of waste CRT is accumulated every year. [0003] Metallurgical slag such as blast furnace slag and steel slag is a large amount of solid waste discharged in the metallurgical process, carrying a large amount of sensible heat. At present, iron and steel enterprises generally adopt the method of direct cooling and reuse, which fails to realize the utilization of metallurgical slag heat ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C10/00C03C6/10
Inventor 李宇苍大强努尔艾力·库尔班江热娜古丽·艾克白尔
Owner UNIV OF SCI & TECH BEIJING
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