AOD炉でのNiO使用について

概要

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A study was made about the effects of NiO sinter injected to the AOD vessel, refining stainless steel, on Ni and Cr yields, decarburization rate and efficiency, temperature decreasing and the others. Furthermore, the difference in the effect between two injection methods of NiO sinter was investigated. The results are as follows:(1) Using NiO sinter, 20kg per charge ton, decarburization rate becomes higher about 15%. But decarburization efficiency decreases a little.(2) There is no difference in Ni and Cr yields between NiO sieter and high carbon ferronickel.(3) The effect of NiO sinter as a coolant is certified. It is about 70°C using 20kg per charge ton.(4) AOD productivity becomes higher using NiO sinter.(5) Continuous injection is better than batch injection for the AOD productivity.Regarding these results, a continuous injection equipment of NiO sinter was manufactured in CO-operation with Takakura Works. In this paper, introduction of this equipment is also written.
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