J. Technology and Education, Vol.12, No.2, pp.33-38, 2005

研究論文

 

LCD装備製品の無害化及び資源化処理の新手法 -レアメタルの再生-

 

住毋家　岩夫¹、比留間　文彦*²

¹�鞄d硝エンジニアリング　（〒347-0111　埼玉県北埼玉郡騎西町鴻茎3202-1）

²ウェールズ大学　（〒162-0825　東京都新宿区神楽坂1-2）

*adm@u-wales.jp

 

New Integrated Treatment Technology for Environment Friendly Recycling of Appliances with LCDs  - Reclamation of Rare Metals –

 

Iwao SUMOGE¹ and Fumihiko HIRUMA*²

¹Densho Engineering Co.,ltd (3202-1, Koguki, Kisai, Kitasaitama, Saitama 347-0111)

²University of Wales (1-2,Kagurazaka, Shinjuku, Tokyo 162-0825)

 

(Received September 14, 2005; Accepted December 13, 2005)

 

  Abstract

This study investigated the processing of electronic equipment containing LCDs for recycling and reclamation of rare metals.  Several aspects of the thermal-decomposition gasification/melting process are investigated: furnace heating without oxygen for the equipment with LCDs, which is heated without breaking into pieces beforehand; minimization of harm to the environment by burning the exhaust gases at a temperature where dioxin is not generated and where other toxic substances are decomposed; isolating the products of thermal-decomposition gasification as glass, electronic parts and tar; breaking up of the decomposed glass into pieces, and separation and removal of the adhered residual substance from the broken glass by chemical treatment. The glass and metal are reused, and gold, indium and other rare metals are reclaimed from the electronic parts; the tar is used as fuel. The recovery of indium has become particularly important in recent years due to concerns about resource exhaustion.

Key words: LCD, Environmental harm minimization, Recycling