Simulation and Application of Top Lance with Various Tilt Angles in Dephosphorization Ladle Furnace

• Liu Fuhai

  Beijing Key Laboratory of Research Center of Special Melting and Preparation of High-end Metal Materials, University of Science and Technology Beijing School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing

• Zhu Rong

  Beijing Key Laboratory of Research Center of Special Melting and Preparation of High-end Metal Materials, University of Science and Technology Beijing School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing

• Wang Qigang

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

• Bai Ruiguo

  Chengde Iron and Steel Company, Chengde Iron and Steel Company

抄録

Characteristics of flow field and stirring effects of top lance with various tilt angles (Tilt angles were 39°, 41°, 43°, 45° and 47°, respectively) on the molten bath were studied. The mixing time, impacting depth and impacting diameter were measured by water experiment. Flow field characteristics of three-phase flow were simulated by Fluent software. It was found that 43° oxygen lance could get the shortest mixing time being 56 s, the medium impacting depth being 36 mm and medium impacting diameter being 115 mm. When injecting by the 43° oxygen lance, average flow velocity of molten bath was the biggest being 0.0329 m/s, and volume of dead-zone was the minimum being 1.90 m³. In order to study metallurgical effects of oxygen lance with tilt angle, both 43° and 45° oxygen lances were experimented in a dephosphorization ladle furnace. The experiment showed that the oxygen lance with tilt angle can guarantee the normal smelting process. Compared with the 45° oxygen lance, the content of phosphorus in semi-steel B was decreased by 0.012 mass%, the dephosphorization rate was increased by 7.9% and the content of T. Fe loss was dropped by 1.9 mass%. It proved the oxygen lance with tilt angle could get a remarkable dephosphorization effect in a ladle furnace.

収録刊行物

• ＩＳＩＪ　Ｉｎｔｅｒｎａｔｉｏｎａｌ

  ＩＳＩＪ　Ｉｎｔｅｒｎａｔｉｏｎａｌ 55 (8), 1633-1641, 2015

  一般社団法人 日本鉄鋼協会

キーワード

• ladle furnace
• top-blowing
• water experiment
• numerical simulation

詳細情報

• CRID: 1390001206487378304
• NII論文ID: 130005096614
• DOI: 10.2355/isijinternational.isijint-2014-791
• ISSN: 13475460
• ISSN: 09151559
• Web Site: https://www.jstage.jst.go.jp/article/isijinternational/55/8/55_ISIJINT-2014-791/_pdf
• 本文言語コード: en
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