Watson, Cole, Grindle & Watson
Flash smelting furnace
 A flash smelting furnace which comprises a reaction shaft, a concentrate combustion device disposed at the top of the furnace shaft, a settler disposed with one end thereof connected to the lower part of the reaction shaft, an uptake disposed as connected to the other end of the settler and at least one lance pipe extending through the ceiling of the settler between the reaction shaft and the uptake and adapted to blow at least powdery raw materials and a reaction gas into the melt inside the settler. 
Sumitomo Metal Mining Company Limited
F C F C C F F
F27B C22B F27B C22B C22B F27B F27D
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Yasuo Yoshiaki Takayoshi
Ojima Mori Kimura