Cold Strength and High Temperature Behaviors of Self-Reducing Briquette Containing Electric Arc Furnace Dust and Anthracite

• Wu Shengli

  School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing

• Chang Feng

  School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing

• Zhang Jianliang

  School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing

• Lu Hua

  School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing

• Kou Mingyin

  School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing

抄録

Electric arc furnace dust (EAFD) is one of the by-products of steelmaking industry. This research aims at dealing with EAFD by pyrometallurgy through mixing it with anthracite to be used as carbon-containing briquettes in RHF. The effect of the briquetting parameters on the green pellet strength was investigated in this paper. Effects of reduction temperature, reduction time and C/O molar ratio on metallization rate and removal rate of element Zn were also studied respectively. The results showed that: Effect of different factors on the drop number was greater than the compressive strength of briquettes. Green briquette drop number was more sensitive to moisture content and bentonite content. Given 2 wt% content of bentonite, 70 MPa pressure and 1.0 mole ratio of C/O, the drop number of the green pellets increased from 1.4 times to 6.4 times by water content changed from 4 to 10 wt%. Zinc and iron compounds are both easy to be reduced by anthracite. When the reduction temperature is up to 1200°C, the zinc can be rapidly reduced within 5 min. But if the temperature reduced by 100°C, the total removal time would be prolonged to 20 min. The iron-containing phases were mainly Fe, Ca₂Fe₂O₅ and a small amount of FeO after high temperature reduction. When reduction temperature, reduction time, C/O molar ratio were 1200°C, 20 min and 1.1 respectively, direct reduction iron was most concentrated.

収録刊行物

• ＩＳＩＪ　Ｉｎｔｅｒｎａｔｉｏｎａｌ

  ＩＳＩＪ　Ｉｎｔｅｒｎａｔｉｏｎａｌ 57 (8), 1364-1373, 2017

  一般社団法人 日本鉄鋼協会

キーワード

• EAFD
• briquetting
• drop number
• direct reduction
• dezincification
• metallization rate

詳細情報

• CRID: 1390001206488585472
• NII論文ID: 130005982804
• DOI: 10.2355/isijinternational.isijint-2017-013
• ISSN: 13475460
• ISSN: 09151559
• Web Site: https://www.jstage.jst.go.jp/article/isijinternational/57/8/57_ISIJINT-2017-013/_pdf
• 本文言語コード: en
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