Development and application of desulfurization process for 180 t RH vacuum refining furnace

DIAO Jia-Qi

doi:10.13228/j.boyuan.issn0449-749x.20180134

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Iron and Steel ›› 2018, Vol. 53 ›› Issue (11) : 41-46. DOI: 10.13228/j.boyuan.issn0449-749x.20180134

Development and application of desulfurization process for 180 t RH vacuum refining furnace

DIAO Jia-Qi

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Abstract

The desulfurization technology in the RH process was developed to reducethe sulfur mass percent in the non-oriented silicon steel. The desulfurization degree was controlled at 30%-60% in a RH reactor， and the ratio of in the W800 non-oriented silicon steel with[w([S])≤0.005 0%] was increased from 72.19% upto 98%. Meanwhile， this process was able to ensure that [w(T[O])＜]0.002 0% and[w([N])＜]0.001 5% at the end of the RH treatment. Through the slag deoxy-modification during the tapping and the RH treatment，[w((TFe))]at the end of the RH treatment was controlled below 3%. The slag basicity was kept above 5.0， and the sulfur distribution ratio between slag and steel was controlled at 80-260，which is favored to the improvement of the desulfurization process in the RH treatment.

Key words

non-oriented silicon steel / RH vacuum furnace / Desulfurizer / Ladle Slag

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DIAO Jia-Qi. Development and application of desulfurization process for 180 t RH vacuum refining furnace[J]. Iron and Steel, 2018, 53(11): 41-46 https://doi.org/10.13228/j.boyuan.issn0449-749x.20180134

References

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