Cold Model Study of Blast Gas Discharge from the Taphole during the Blast Furnace Hearth Drainage

• He Qinglin

  Chemical Engineering, University of Newcastle

• Evans Geoff

  Chemical Engineering, University of Newcastle

• Zulli Paul

  Steel Research, BlueScope Steel

• Tanzil Francis

  Industrial Markets, BlueScope Steel

抄録

Blast gas discharge from the taphole in the course of the blast furnace hearth drainage was experimentally studied using a packed bed cold model. It was found that gas break-through time was strongly influenced by the furnace operating conditions and coke bed structure. Gas break-through time decreases with (a) increasing draining rate; (b) decreasing slag and iron levels in the hearth; and (c) increasing slag viscosity. It increases with an increase in the coke-free layer depth and coke-free space width. Under certain conditions, the gas-liquid interface in the region directly above the taphole becomes unstable, leading to viscous finger formation and subsequently early blast gas discharge from the taphole. The amount of blast gas entrained into the taphole due to viscous fingering, when it occurs, is sufficient to cause a splashy taphole stream.

収録刊行物

• ＩＳＩＪ　Ｉｎｔｅｒｎａｔｉｏｎａｌ

  ＩＳＩＪ　Ｉｎｔｅｒｎａｔｉｏｎａｌ 52 (5), 774-778, 2012

  一般社団法人 日本鉄鋼協会

キーワード

• blast gas discharge
• splashy taphole
• viscous fingering
• hearth drainage
• blast furnace
• ironmaking

詳細情報

• CRID: 1390001206487289472
• NII論文ID: 130002056305
• DOI: 10.2355/isijinternational.52.774
• COI: 1:CAS:528:DC%2BC38XnsVKgurc%3D
• ISSN: 13475460
• ISSN: 09151559
• Web Site: https://www.jstage.jst.go.jp/article/isijinternational/52/5/52_774/_pdf
• 本文言語コード: en
• データソース種別:
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