講演情報
[3K0301-05-04]四阪製錬所におけるEAFダスト処理技術開発について
○高谷 悟1、工藤 万雄1、山本 恵介1 (1. 株式会社四阪製錬所)
司会：川村 茂（秋田大学）
キーワード：
電炉ダスト、亜鉛リサイクル、ウェルツキルンプロセス、造粒
Shisaka Smelting Co., Ltd. has recovered crude zinc oxide from electric arc furnace (EAF) dust using the Waelz kiln process since 1977. When the operation started, malfunctions frequently occurred in a granulation process which was previous process of a reduction roasting process. We stopped this process and shifted to the process directly charging EAF dust in the reduction rotary kiln. As a result, we had been weak in treating high-zinc EAF dust for a long time. To improve the disadvantage, we introduced a new granulation process which is off-line in 2011. Thereby, zinc recovery rate in reduction rotary kiln greatly increases and the capacity treating high-zinc EAF dust reaches 50,000 tons per year.