Dephosphorization method for converter steelmaking through double-slag method

According to the dephosphorization method, dephosphorization process parameters and various chemical components in dephosphorization slag at the dephosphorization end point are controlled, on the basis of controlling the binary alkalinity representing the dephosphorization slag and the CaO/SiO2 rati...

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Bibliographic Details
Main Authors ZHANG RUNHAO, YANG JIAN, SUN HAN
Format Patent
LanguageChinese
English
Published 17.05.2024
Subjects
CHEMISTRY
METALLURGY
METALLURGY OF IRON
PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OFWROUGHT-IRON OR STEEL
TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
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Summary:According to the dephosphorization method, dephosphorization process parameters and various chemical components in dephosphorization slag at the dephosphorization end point are controlled, on the basis of controlling the binary alkalinity representing the dephosphorization slag and the CaO/SiO2 ratio reflecting the dephosphorization capacity of the dephosphorization slag, (FeO + MnO)/(CaO + MgO) which is larger than or equal to 0.5 and smaller than or equal to 1.0 is further introduced, the foaming performance and viscosity of the dephosphorization slag are controlled, and the dephosphorization capacity of the dephosphorization slag is improved. The dephosphorization slag can be smoothly discharged, the ratio of the fluidity to the dephosphorization capacity of the dephosphorization slag is comprehensively reflected, the phosphorus enrichment capacity of the dephosphorization slag at the end point of the dephosphorization period is excellent, and the content of P2O5 in the dephosphorization slag is high and i
Bibliography:Application Number: CN202410180413