Article ID

96BEN41004

Title

Removal of copper from steel scraps by NH_{3} gas

アンモニアによる鉄スクラップからの銅の除去

Author(s)

Ryosuke O. Suzuki
Toshitsugu Hidani
Koji Takemura
Katsutoshi ONO

鈴木亮輔 
日谷知嗣 
竹村康司 
小野勝敏

Publication/Publisher

Metals & Technology, pp. 55--66, August, 1996.

金属, 55--66頁, 1996年8月臨時増刊号

Abstract

A concept for copper removal from the molten steel was proposed to recycle the car scraps to a fresh steel sheet suitable to a new car body. Evaporation of copper by blowing NH_{3} gas onto molten pure copper was found and shown visually by the laser-light sheet method. This evaporation rate was significantly larger than the theoretical maximum evaporation rate under the vacuum, and several possible mechanisms were discussed in detail. The copper removal from the molten steel was confirmed experimentally by blowing of NH_{3} under the reduced pressure. This decuprization was ten times faster than the vacuum degassing. The industrial applicability and efficiency were simulated and discussed.