| 摘要 |
PURPOSE:To advantageously recover a converter gas enriched with CO by executing flux injection with bottom blowing in the initial and end periods of blowing and controlling slag forming in the middle period thereby adjusting the height of slag forming. CONSTITUTION:The flux injection from a bottom blowing tuyere is executed in the initial and end periods of blowing when the concn. of CO is low to suppress the slag forming. The converter gas is recovered in the middle period of blowing when the concn. of CO is high. The control of the slag forming including the stopping and restarting of the flux injection, continuous throwing of iron ore, temporary stopping thereof, etc. is executed during this time so that the height of the slag forming is maintained in the 50-80% range of the furnace throat height. The converter gas having a high concn. of CO is generated by such slag forming control, by which the energy from the converter is recovered with high efficiency.
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