发明授权
- 专利标题： Method and apparatus for controlling the flow of molten steel in a mould
- 专利标题（中）： 控制模具中钢水流动的方法和装置
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申请号： US12349335申请日： 2009-01-06
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公开(公告)号： US07975753B2公开(公告)日： 2011-07-12
- 发明人: Anders Lehman , Helmut Hackl , Jan-Erik Eriksson , Olof Sjoden
- 申请人： Anders Lehman , Helmut Hackl , Jan-Erik Eriksson , Olof Sjoden
- 申请人地址： SE
- 专利权人： ABB AB
- 当前专利权人： ABB AB
- 当前专利权人地址： SE
- 代理机构： St. Onge Steward Johnston & Reens LLC
- 主分类号： B22D11/00
- IPC分类号： B22D11/00 ; B22D27/02
摘要：
Method for controlling a flow of molten steel in a mould by applying at least one magnetic field to the molten steel in a continuous slab casting machine. Controlling a molten steel flow velocity on a molten steel bath surface to a predetermined molten steel flow velocity by applying a static magnetic field to impart a stabilizing and braking force to a discharge flow from an immersion nozzle when the molten steel flow velocity on the meniscus is higher than a mould powder entrainment critical flow velocity. Controlling the molten steel flow velocity on the meniscus to a range of from an inclusion adherence critical flow velocity or more to a mould powder entrainment critical flow velocity or less by applying a shifting magnetic field to increase the molten steel flow when the molten steel flow velocity on the meniscus is lower than the inclusion-adherence critical flow velocity.