| 摘要 |
PROBLEM TO BE SOLVED: To provide a technique with which dust developed in a converter is effectively reduced without bringing lowering of decarburizing oxygen efficiency. SOLUTION: Water is mixed into the oxygen gas for top-blown lance in the converter and a fire point at ordinarily high temperature is cooled and vapor pressure in metal content is lowered to restrain the development of the dust. The effective dust restraining effect can be obtained by adding the water having≥4 (l/min)/m<SP>2</SP>per fire point area for restraining the development of the dust and also, the deterioration of the decarburizing oxygen efficiency is restrained by making this water adding quantity to≤50 (l/min)/m<SP>2</SP>per the fire point area. In the case of performing this operation, slag quantity during blowing is at≤50 kg/t of metal, in the maximum. COPYRIGHT: (C)2006,JPO&NCIPI
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