| 摘要 |
PURPOSE:To carry out casting bed desiliconization with high treating effect by branching a treating agent charge means into the inside and the outside of a dust collecting hood, charging the agent from the outside at the beginning, and changing over the charge to the inside when the circulation in a trough becomes obstructed. CONSTITUTION:In casting bed desiliconization, a treating agent 7 is firstly charged from a charge chute 5'' provided at the outside of a dust collecting hood 4, and an inside chute 5' is closed with a damper 10. Since the treating agent 7 is charged into molten iron 6 at a distance from the leading end 11 of a trough, the treating agent 7 is never sucked into the dust collecting hood 4. When slag 8 begins clogging a trough 1, the treating agent 7 is charged from the inside chute 5' by changing over the damper 10. Accordingly, since the treating agent 7 is charged at the leading end 11 of the trough, a hood 12 at the leading end is provided in the hood 4 to prevent the loss of the treating agent 7 due to suction into the hood 4. When the circulation in the trough 1 returns to normal, the agent is again charged from the outside chute 5''. |
