Method for recycling and harmless treating of waste electronic glass

A kind of harmless treatment, electronic technology, applied in the direction of improving process efficiency, to achieve the effect of flexible technology, large processing capacity and proper treatment

Inactive Publication Date: 2011-09-28
BEIJING GENERAL RES INST OF MINING & METALLURGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Also known as oxygen bottom blowing smelting method, but it is only suitable for the treatment of high-lead concentrates containing more than 47% lead

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Take waste electronic glass fragments obtained after dismantling, crushing and sorting waste color TV cathode ray tubes, with a lead content of 17.9% and a particle size of 3-23 mm, and then grind it with a ball mill until the particle size is 1-23 mm. 2.5 mm, mixed with lead concentrate and zinc hydrosmelting slag, the amount of waste electronic glass scrap is 31.1% of the total mass of lead concentrate and zinc hydrosmelting slag, and then lead concentrate Anthracite with a total mass of 4.5% lead-containing raw materials and zinc hydrometallurgy slag. The particle size of the anthracite is 1.5-3.5 mm. 2 The mass ratio is 1:1 and CaO:SiO 2 Pyrite, iron oxide and lime are added at a mass ratio of 0.6:1 to form a final mixture consisting of Pb32.9%, Zn6.03%, SiO 2 12.1%, Fe12.1%, CaO7.26%, S16.2%, Cu0.2%, the final mixture is ground to less than 1mm, and then the mixture is sprayed into the flash smelting reactor with air, Smelting at 1250-1450°C produces crude lead, ...

Embodiment 2

[0040] Take the waste electronic glass fragments obtained after dismantling, crushing and sorting the cathode ray tubes of electronic computers, the mass concentration of lead is 21.6%, the particle size is 6-19 mm, and it is ground again with a ball mill until the particle size is 1-2.5 mm , mixed with lead concentrate, lead-containing copper hydrosmelting slag and lead-precious metal system slag. 8% of the total mass of raw materials, then add coke with a total mass of 4.9% of the total mass of lead-containing raw materials of lead concentrate, lead-containing copper hydrosmelting slag and lead-precious metal system slag, the coke particle size is 1.5-3 mm, and then add Medium Fe:SiO 2 The mass ratio is 1:1.05 and CaO:SiO 2 Pyrite, iron oxide and lime are added at a mass ratio of 0.68:1 to form a final mixture consisting of Pb40.6%, Zn4.61%, SiO 2 13.5%, Fe12.86%, CaO9.18%, S17.42%, Cu0.53%, the final mixture is ground to less than 1mm, and then the mixture is sprayed into...

Embodiment 3

[0042] Take the mixed waste electronic glass fragments obtained after dismantling, crushing and sorting waste color TV sets and black and white TV cathode ray tubes. The mass concentration of lead is 12.37%, and the particle size is 3.5-40 mm. It is ground again with a ball mill. To a particle size of 1.5-3.0 mm, it is mixed with lead concentrate, zinc hydrosmelting slag and lead precious metal system slag, and the amount of waste electronic glass scrap is three 15.5% of the total mass of lead-containing raw materials, then add coke with 5.2% of the total mass of lead-containing raw materials including lead concentrate, zinc hydrometallurgy slag and lead precious metal system slag. Medium Fe:SiO 2 The mass ratio is 1:1.1 and CaO:SiO 2 Add pyrite, iron oxide and lime at a mass ratio of 0.72:1 to form a final mixture of Pb45.86%, Zn5.31%, SiO 2 15.54%, Fe14.13%, CaO11.19%, S15.6%, Cu0.08%, the final mixture is ground to less than 1mm, and then the mixture is sprayed into the f...

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Abstract

The invention relates to a method for recycling and harmless treating of waste electronic glass, and relates to a smelting process utilizing an existing pyrometallurgical lead smelting method to treat various lead-containing glass substances generated after discarding of televisions and computers of which cathode ray tubes are displays. The method provided by the invention is characterized by crushing discarded electronic glass, mixing and proportioning with mineral raw materials, an auxiliary agent and carbon used as a reducing agent from lead smelting process to obtain a mixed material, and spraying the mixed material with air to a flash smelting reaction furnace for flash smelting to obtain crude lead and smelting slag; and remixing the smelting slag with carbon used as a reducing agent in a depletion electric furnace for further reducing to obtain slag with lead content lower than 2%. The method provided by the invention can effectively treat lead-containing dangerous solid wastes, and has the advantages of low treatment cost, high treatment capacity and no generation of secondary pollutants; the raw materials have high adaptability; and the generated smelting slag can be effectively utilized.

Description

technical field [0001] A method for recycling and harmless treatment of waste electronic glass, involving a smelting process using the existing pyro-method lead smelting process to treat various types of lead-containing glass produced after discarding TVs and computers that use cathode ray tubes as displays method of substances. technical background [0002] Electronic glass (CRT Glass) mainly refers to glass bulbs that constitute color picture tubes, black and white picture tubes, and projection tubes for rear-projection TVs, as well as glasses such as tube neck tubes, tube glass for picture tube core columns, low-melting solder glass powder, and bracket glass rods for electron guns. Components, which are the core components of cathode ray tube displays, that is, glass for picture tubes. Cathode Ray Tube (CRT, commonly known as picture tube) is widely used in the manufacture of display picture tubes of televisions and computers. In order to prevent X-ray radiation, a large...

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 王成彦李敦钫郜伟揭晓武杨永强尹飞陈永强王忠崔成旺李强
Owner BEIJING GENERAL RES INST OF MINING & METALLURGY
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