To provide a lead smelting furnace and a lead smelting method with which the consumption of coke is reduced, the pollution of an exhaust gas can be prevented, the working environment is made good, the temp. distribution in the furnace can be controlled and adjusted and particularly, the temp. of the furnace bottom part and the oxidizing atmosphere can be controlled.
A shaft furnace for using the both of solid and gas fuels arranges gas burners 3 and 4 for adjusting a temp. in a furnace and a gas burner having a gas spouting hole 6 inclined downward at the lower part of the shaft furnace having a water-cooling type fire grate 2 for placing a carbonaceous solid reducing material 1. In such a case, the combustion gas spouting hole 6 in one gas burner among these gas burners is arranged in a steep desent toward the furnace bottom part. A temp. at the furnace bottom part is adjusted to ≥1,100°C by heating the combustion gas spouting hole 6 of the gas burner and the supplied air quantity for combustion is adjusted to 0.9-1.2 air ratio to control the oxidizing atmosphere.
NAKAMURA HAJIME
HIROSUE MASAAKI
JAPAN SCIENCE & TECH CORP
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