Raw material supply device, flash smelting furnace and nozzle member

A raw material supply device that supplies a raw material into a flash smelting furnace and supplies first gas and second gas into the flash smelting furnace, the first gas and the second gas contributing to reaction of the raw material, comprising:

• a lance in which a first gas pathway for supplying first gas into the flash smelting furnace and a pathway for supplying gas for dispersion into the flash smelting furnace are provided, the pathway surrounding the first gas pathway;
• a raw material pathway that is provided out of the lance and supplies the raw material into the flash smelting furnace;
• a second gas pathway that is provided out of the raw material pathway and supplies the second gas into the flash smelting furnace;
• and
• a blade that is provided in the first gas pathway, has an inclined face with which the first gas collides and revolves the first gas toward a lower side of the flash smelting furnace, the inclined face being inclined with respect to a flow direction of the first gas in the first gas pathway wherein the blade is provided between a ring-shaped frame provided in the first gas pathway and a hub portion provided in a center portion of the frame portion.