Waste circuit board material disposal and utilization technology

A circuit board and waste technology, which is applied in the field of circuit board waste disposal and utilization, can solve the problems of secondary environmental pollution caused by dioxin, and achieve the effects of saving energy consumption, no secondary pollution, and simple equipment

Active Publication Date: 2016-11-09
江西自立环保科技有限公司
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

The technology of the present invention is the first in China, which solves the problem of secondary pollution of dioxin to the environment

Method used

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  • Waste circuit board material disposal and utilization technology

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Experimental program
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Effect test

Embodiment 1

[0054] Such as figure 1 As shown, the process flow:

[0055] (1) Disassemble waste electrical appliances (used computers, mobile phones, TV sets, VCD players, speakers, copiers, fax machines, automotive electronic components and other commonly used electronic products), and sort out circuit board waste.

[0056] (2) Use a shredder or a rotary crusher to crush the circuit board waste to form fragments with a particle size of 2 cm×2 cm to 8 cm×8 cm.

[0057] (3) According to the weight ratio of 20:3:7 to 12m 2 The double-sided bottom-blown furnace (hereinafter referred to as the bottom-blown furnace) is put into circuit board waste fragments, coal powder, and electric furnace insulation slag. Coal powder is sprayed into the furnace from the top of the furnace, and circuit board waste is put in from the feed bin, and burned and decomposed completely at 1200 ℃ ~ 1250 ℃. The slag in the electric furnace holding furnace is released from the slag outlet of the bottom blowing furna...

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PUM

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Abstract

The invention discloses a waste circuit board material disposal and utilization technology. Waste circuit board materials serve as raw materials, and are subjected to mechanical crushing and smelting in an oxygen enrichment side-blowing molten pool at the temperature of 1100-1400 DEG C to produce crude copper rich in rare and noble metals; then metallic copper and anode mud rich in rare and noble metals are obtained through electrolytic refining; smelting gas restrains resynthesis of dioxin after being subjected to secondary combustion and quick cooling; and a bag collector recycles oxides of volatile metals such as tin, lead and zinc, and the dust content of the drained gas is 0-15 mg/Nm<3>. A trapping agent can make the copper content of slag be lower than 0.2%, recycling of all rare and noble metals is achieved, and the slag is waste slag containing silicate and can be used as cement raw materials or road foundation laying materials. The waste circuit board materials and the like are recycled and utilized, effective separation and respective enrichment and recycle of various metals are achieved, organic substances are used as fuel, and no secondary pollution is generated for the environment. The process procedure is short, and the remarkable economic, environment-friendly and social benefits are achieved.

Description

technical field [0001] The invention relates to the technical field of pyro-wet combined smelting technology, in particular to a technology for disposal and utilization of circuit board waste. Background technique [0002] Electronic waste is a general term for all kinds of electronics that are approaching the end of their "service life", including used computers, mobile phones, televisions, VCD players, speakers, copiers, fax machines, refrigerators, washing machines and other commonly used electronic products. Due to technological progress and price reduction, many of these products are facing the fate of being eliminated by users when they are far from reaching their actual service life. [0003] The generation of electronic waste (including the scrap generated from the production of electronic circuit boards) is rapidly increasing at a rate of 3% to 5% per year, becoming the fastest growing type of solid waste. According to relevant reports, the world produces up to 50 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B1/00C22B15/00C22B11/02C25C1/12C22B19/30C22B21/00C22B25/06
CPCC22B1/005C22B7/001C22B11/025C22B15/0056C22B19/30C22B21/0007C22B25/06C25C1/12Y02P10/20
Inventor 叶标许国洪路永锁黄中良
Owner 江西自立环保科技有限公司
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