Decarburization by carbonate decomposition of CO2 in RH process

LIN Xiang

doi:10.13228/j.boyuan.issn0449-749x.20150341

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Iron and Steel ›› 2016, Vol. 51 ›› Issue (5) : 37-40. DOI: 10.13228/j.boyuan.issn0449-749x.20150341

Decarburization by carbonate decomposition of CO2 in RH process

LIN Xiang

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Abstract

An investigation on decarburization by carbonate decomposition of CO2 in RH process has been put forward. By means of spraying calcium carbonate powder into molten steel from the upper snorkel， the decarburization reaction and purifying molten steel were promoted. The decarburization mechanism of this novel technique has been analyzed. The industrial experiments have been carried out to investigate the variation of the cleanness of molten steel before and after the treatment. The results indicate that decarburization reaction took place after carbonate decomposition of CO2 decarburization treatment and decarburization process was accelerated， which led to shorten at least 3 min for the RH processing time and reduce 3-5 RMB for the production cost per ton steel.[w(T[O])]in the as-cast slab approached to 0.001 0% after non-oxygen promoting decarburization treatment， which improved the cleanness of the molten steel significantly.

Key words

RH / CaCO3 decomposition / CO2 decarburization / Cleanness steel

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LIN Xiang. Decarburization by carbonate decomposition of CO2 in RH process[J]. Iron and Steel, 2016, 51(5): 37-40 https://doi.org/10.13228/j.boyuan.issn0449-749x.20150341

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