| 摘要 |
<p>PURPOSE:To make operation easy in the stage of blowing gaseous O2 and carbonaceous material into a molten steel by using an arc furnace and refining the molten steel by tracing the transition of the temp. of the waste gas from the arc furnace and estimating exactly the content of C in the molten steel. CONSTITUTION:Gaseous O2 increases quickly the temp. of a molten steel when the air enriched with O2 and carbonaceous material are blown into the molten steel in refining of the molten steel using an arc furnace. Blowing of the O2 is then stopped and blowing of the carbonaceous material is continued to reduce part or more of the FeO formed by blowing of the gaseous O2 and to increase the content of C in the molten steel up to a desired level. The point when the content of C in the molten steel attains 0.10% is exactly estimated by measuring the temp. of the waste gas from the arc furnace without analyzing the sample of the molten steel. This method is executed easily and quickly and the operation is made extremely easy. The wasteful operation time is eventually eliminated, the consumption of electric power and material is improved and the variance in the content of C of the product steel material is decreased.</p> |
