Development of dust injection technology for EAF steelmaking process

2015 Fiscal Year Final Research Report

• Project/Area Number: 25249105
• Research Category: Grant-in-Aid for Scientific Research (A)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Metal making/Resorce production engineering
• Research Institution: Tohoku University
• Principal Investigator: NAGASAKA TSTSUYA 東北大学, 工学(系)研究科(研究院), 教授 (30180467)
• Co-Investigator(Kenkyū-buntansha): MIKI Takahiro 東北大学, 大学院工学研究科, 准教授 (30312606) ; MATSUBAE Kazuyo 東北大学, 大学院工学研究科, 准教授 (50374997) ; HIRAKI Taekhito 東北大学, 大学院工学研究科, 助教 (60550069)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Keywords: ダスト / 亜鉛 / リサイクル / 微粒子センサー / インジェクション / 産業廃棄物 / 電気炉製鋼

Outline of Final Research Achievements

In this study, the dust generated during normal EAF steelmaking process was returned to the EAF by injection, and the regenerated dust was collected by using a bag filter. The amount and chemical composition of regenerated dust was continuously monitored by the particle sensor which was equiped in the dust collection system of practical EAF factory. The dust injection technology was determined to be very effective in reducing the dust treatment burden by decreasing the quantity and enhancing the quality of the regenerated dust. The regenerated dust was provided to the CaO addition process which was developed by the authors. It was confirmed that the most of zinc in the treated dust was recovered from the regenerated dust. Due to such a very good result, our partner EAF company applied the dust injection technology to their routine steelmaking operation and the total amount of dust generation was successfully reduced significantly.

Free Research Field

金属生産工学