| 摘要 |
PURPOSE:To remarkably improve heating efficiency inside a furnace by giving heat by the secondary combustion of generated CO gas and also passing through the secondary combustion zone by charging powdery additive, for use as a heat medium. CONSTITUTION:The CO gas, which is generated at the time of refining molten iron in the converter 1, is again burnt by oxygen blown from oxygen tuyeres 4, to form the secondary combustion zone 7 in the space of the furnace. Next, powdery additive 8, such as coal, coke, etc., from a hopper 6 arranged above the furnace is charged as fed out continuously. The powdery additive 8 is passed through the secondary combustion zone 7 and after increasing the sensible heat by heat exchange, it is dropped in the slag 9 and the molten metal 10 to raise the temps.
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