PURPOSE: To reduce the damage to a tilting trough for flowing down molten iron and to prolong the service life of the trough by forming a molten iron flowing-out groove in a molten iron trough for a blast furnace to a sectorially widening shape, arranging a weir at the tip part thereof and opening a tunnel type flowing-out part at the bottom part of the weir.
CONSTITUTION: The molten iron 2 from the blast furnace is flowed out into the tilting trough 10 through the molten iron flowing-out groove 2 in the molten iron trough 1 for the blast furnace. The flowing-out groove 3 is formed as the sectorially widening shape over from the tip part to the upstream side, and an upward gradient inclining part 8 is arranged at the bottom surface of the downstream end part and the weir 9 is projectively arranged so as to flow down the molten iron into the tilting trough 10 while thinning and widening the molten iron. Further, the tunnel type flowing-out hole 11 is opened by embedding a pipe, etc., at the lower part of the weir 9 so as not to remain the molten iron 2 at the weir 9. By this structure, the damage to the dropping position of molten iron 2 in the tilting trough bed part is reduced and the service life of the trough is drastically prolonged.
YAMAZAKI SADAYUKI
OKA HIROMICHI
