Comprehensive recovery method of waste CRT (Cathode Ray Tube) cone glass

A recycling method and cone glass technology, which is applied in the field of comprehensive recycling of waste CRT cone glass, can solve problems such as product hazards, inability to effectively extract lead, and large environmental pollution, and achieve the effect of comprehensive utilization of resources

Inactive Publication Date: 2013-11-27
开远市龙腾冶炼厂
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

CRT cone glass contains 15-25% lead. Some CRT cone glasses contain more alkaline oxides, the glass structure is loose, and lead oxide is easy to dissolve, which will pollute the environment. Most of the main components of CRT cone glass for SiO 2 -PbO-Na 2 O-CaO glass, lead atoms are mainly filled in -O-Si-O-Pb-0, the structure is very stable, it is difficult to destroy its structure through direct smelting, and lead cannot be effectively extracted
If it is not handled properly, it will also cause great harm to the ecological environment and human health.
[0004] Due to the lack of feasible utilization technology for the waste CRT cone glass with high lead content for a long time, most of the CRT cone glass is cured or detoxified now to reduce the impact on the environment, but it has not fundamentally solved the impact of lead on the environment and human beings. hazard, the transformed product remains a potential hazard

Method used

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  • Comprehensive recovery method of waste CRT (Cathode Ray Tube) cone glass

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Weigh 20 tons of waste CRT cone glass with a particle size of 80mm, 60 tons of lead oxide ore in the form of 240mm×120mm×60mm block, and 20 tons of coke with a particle size of 100mm, and mix them to obtain the primary mixture; detect the primary mixture FeO, SiO 2 , CaO, MgO, Zn, S and Al 2 o 3 The weight content of FeO is 26%, SiO 2 The weight content is 25%, the weight content of CaO is 15%, the weight content of MgO is 16%, the weight content of Zn is 5%, the weight content of S is 1% and Al 2 o 3 The weight content is 5%. The primary mixture is smelted in a blast furnace at a temperature of 1200° C. and a smelting time of 6 hours. Lead liquid, slag and smoke are obtained respectively, and the lead liquid is cast into ingots to obtain crude lead products; the smoke and dust are settled, cooled, and bagged to collect dust to obtain standard flue gas; the slag and collected smoke can be recycled as raw materials for the rotary kiln. Among them, the weight content...

Embodiment 2

[0029] Weigh 15 tons of waste CRT cone glass with a particle size of 60mm, 50 tons of lead oxide ore, 20 tons of lead concentrate and 15 tons of coke with a particle size of 120mm, and mix them to obtain the initial mixture; detect the initial mixture FeO, SiO 2 , CaO, MgO, Zn, S and Al 2 o 3 The weight content of FeO is 32%, SiO 2 The weight content of is 20%, the weight content of CaO is 8%, the weight content of MgO is 17%, the weight content of Zn is 3%, the weight content of S is 0.6% and Al 2 o 3 The weight content is 4%. Add 7 tons of calcium stone containing CaO to the initial mixture and mix well to obtain a mixture. Detect, the weight content of FeO in this mixture is 30%, SiO 2 The weight content of is 21.4%, the weight content of CaO is 12%, the weight content of MgO is 17.6%, the weight content of Zn is 1.2%, the weight content of S is 0.57% and Al 2 o 3The weight content is 2.8%. Then put the mixture in a blast furnace for smelting, the smelting temperatu...

Embodiment 3

[0031] Weigh 25 tons of waste CRT cone glass with a particle size of 100mm, 20 tons of lead-acid battery plates, 30 tons of lead oxide ore and 25 tons of coke with a particle size of 80mm, and mix them to obtain the initial mixture; detect the initial mixture FeO, SiO 2 , CaO, MgO, Zn, S and Al 2 o 3 The weight content, the weight content of FeO is 28%, SiO 2 The weight content of CaO is 17%, the weight content of CaO is 7.5%, the weight content of MgO is 17%, the weight content of Zn is 4%, the weight content of S is 0.8% and Al 2 o 3 The weight content is 6%. Add 8 tons of calcium stone containing CaO and 8 tons containing SiO 2 Mix 10 tons of silica into the initial mixture to obtain a mixture. Detect, the weight content of FeO in this mixture is 26%, SiO 2 The weight content of is 22%, the weight content of CaO is 13.4%, the weight content of MgO is 16.3%, the weight content of Zn is 2.4%, the weight content of S is 0.61% and Al 2 o 3 The weight content is 3.2%. T...

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Abstract

The invention relates to a comprehensive recovery method of waste CRT (Cathode Ray Tube) cone glass and belongs to the technical field of environmental protection. The comprehensive recovery method comprises the following steps: a, mixing, namely weighting waste CRT (Cathode Ray Tube) cone glass, lead-containing materials with the lead content of 3-60 percent and coke, and uniformly mixing to obtain a primary mixture; b, detecting and smelting, namely, detecting the weight contents of FeO, SiO2, CaO, MgO, Zn, S and Al2O3 in the primary mixture, and feeding to a smelting device after the weight contents in the primary mixture are qualified, and smelting to respectively obtain smelt lead, slag and dust; and c, carrying out ingot casting on the lead liquid to obtain a coarse lead finished-product. The comprehensive recovery method disclosed by the invention has the beneficial effects that the waste CRT (Cathode Ray Tube) cone glass can be effectively and comprehensively utilized and no environmental pollution is caused.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and in particular relates to a comprehensive recycling method for waste CRT cone glass. Background technique [0002] Cathode Ray Tube (CRT for short), as an important leaded glass product, is widely used in electronic and electrical equipment such as televisions, computer monitors, and oscilloscopes. [0003] At present, the number of TV sets in my country is about 550 million, the vast majority of which are CRT TV sets, and the number of computer CRT monitors has exceeded 40 million. Since 2003, about 20-50 million CRT TV sets and computer CRT monitors have been scrapped every year. How to deal with the above-mentioned scrap products has become an environmental issue of global concern. CRT cone glass contains 15-25% lead. Some CRT cone glasses contain more alkaline oxides, the glass structure is loose, and lead oxide is easy to dissolve, which will pollute the environment. Mos...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B13/00
CPCY02P10/20
Inventor 马智来
Owner 开远市龙腾冶炼厂
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