Apparatus and method for closing or opening an opening, especially a bottom opening of a material hopper for a blast furnace, and blast furnace having such an apparatus
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United States of America Patent
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Dec 6, 2011
Grant Date -
Dec 11, 2008
app pub date -
Jun 6, 2008
filing date -
Jun 8, 2007
priority date (Note) -
In Force
status (Latency Note)
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Abstract
An apparatus is provided for closing or opening an opening, especially a bottom opening of a material hopper arranged above the mouth of a blast furnace having a drivable flap plate, which is movable into an open position leaving the opening clear and into a closed position blocking off the opening and vice-versa. The flap plate carries out, in the region of the opening, a linear movement substantially perpendicular to the plane of the opening and, distal to the opening, a pivoting movement.
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