| 摘要 |
PURPOSE:To economize unit product of fuel by a method wherein a specified aimed temperature is kept by controlling the hot blast amount for circulation in furnace and furnace temperature when material to be heated is charged into a soaking furnace and heated. CONSTITUTION:When the temperature of furnace reaches 300-400 deg.C by heating materials to be heated regulating the hot blast amount for circulation in soaking furnace, the temperature of furnace is raised to the specified maximum temperature TF2 by relieving its limitation and that temperature is kept. Then, when the temperature TS-MAX of the maximum temperature part of material to be heated reaches a specified temperature TS1, the temperature of furnace is reduced to a furnace temperature TF3 a little higher than temperature TS1 and the temperature of material to be heated is kept at temperature TS1. Then, when the temperature TS-MIN of the lowest temperature part of material to be heated reaches temperature TS1, the circulating hot blast amount is again limited, this condition being kept for a specified time tS1'-tS1'' and metallurigical homogenization is completed. |
