| 摘要 |
PURPOSE:To efficiently transmit the heat generated by secondary combustion to a metal bath by burning a carbonaceous material by gaseous O2 so that ore is reduced by melting and splashing the formed metal as splashes to a secondary combustion zone by a gas contg. ore powder. CONSTITUTION:The carbonaceous material and ore are charged into the furnace 1 of the melt reduction furnace. On the other hand, the gaseous O2 is blown from bottom blowing tuyeres 6, etc., into the furnace to burn the above- mentioned carbonaceous material and to reduce the above-mentioned ore by melting, by which the metal bath 2 and slag 3 are formed. The gaseous CO formed by the combustion is secondarily burned by the gaseous O2 blown from tuyeres 4 and the metal bath 2 is heated by the heat generated by the combustion. The gaseous O2 contg. the ore powder is blown from tuyeres 5 to form splashes provided at the position at the height of the metal bath 2 in the above- mentioned operation. The metal of the metal bath 2 is easily splashed as splashes to the secondary combustion zone by the kinetic energy of the ore powder and the gas. The splashes of the metal efficiently absorb the heat generated by the secondary combustion and recover the same in the metal bath 2.
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