Effects of dephosphorization  from solid 2CaO·SiO2-3CaO·P2O5 of  steelmaking slag

Yanchun Lv M.D.; Haibo Li; Yang Liu; Haibao Wang

doi:10.1117/12.2645818

30 August 2022 Effects of dephosphorization from solid 2CaO·SiO₂-3CaO·P₂O₅ of steelmaking slag

Yanchun Lv M.D., Haibo Li, Yang Liu, Haibao Wang

Proceedings Volume 12309, International Conference on Advanced Manufacturing Technology and Manufacturing Systems (ICAMTMS 2022); 123091X (2022) https://doi.org/10.1117/12.2645818
Event: International Conference on Advanced Manufacturing Technology and Manufacturing System (ICAMTMS 2022), 2022, Shijiazhuang, China

Abstract

Different from other conventional large converter in Shougang, Shougang 100 t low flow bottom blow converter is easy increasing the phosphorus in the furnace before steel tapping, especially low carbon steel smelting. For this phenomenon, The effect of the presence of solid phosphorus-rich phase C₂S-C₃P on the phosphorus distribution ratio was investigated, test and calculation shows that solid phosphorus-rich phase in slag can improve the phosphorus distribution ratio. The reason is that the nature of the steel slag changed, it is mainly due to the reduction of the phosphorus-rich phase C₂S-C₃P in the slag, in addition, the change of iron water Si content in the converter has a certain impact on the phosphorus content at the converter end point, smelt the low phosphorus steel by double slag method, when the silicon content is below 0.40 % every 0.10 % reduction in Si content, the P content increase about 10 ppm. In addition, the oxygen supply is too high, it also easily leads the increasing of P at the end point , the main reason is FeO increasing and reduce C₂S-C₃P in furnace slag , This results in increased phosphorus in liquid slag, resulting in redistribution of P between slag and steel.

Citation Download Citation

Yanchun Lv M.D., Haibo Li, Yang Liu, and Haibao Wang "Effects of dephosphorization from solid 2CaO·SiO₂-3CaO·P₂O₅ of steelmaking slag", Proc. SPIE 12309, International Conference on Advanced Manufacturing Technology and Manufacturing Systems (ICAMTMS 2022), 123091X (30 August 2022); https://doi.org/10.1117/12.2645818

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KEYWORDS

Phosphorus

Silicon

Iron

Liquids

Solids

Chemical elements

Carbon

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