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Slag Emulsification during Liquid Steel Desulphurisation by Gas Injection into the Ladle
Author(s) -
Lachmund Helmut,
Xie Yongkun,
Buhles Thorsten,
Pluschkell Wolfgang
Publication year - 2003
Publication title -
steel research international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.603
H-Index - 49
eISSN - 1869-344X
pISSN - 1611-3683
DOI - 10.1002/srin.200300164
Subject(s) - ladle , liquid steel , flue gas desulfurization , slag (welding) , mixing (physics) , materials science , metallurgy , argon , lime , refining (metallurgy) , water model , waste management , chemistry , engineering , physics , computational chemistry , organic chemistry , quantum mechanics , molecular dynamics
According to current practice, the desulphurisation of steel melts is mainly performed in the ladle with lime saturated top slags. The injection of argon gas into liquid steel provides for intensive mixing and accelerated sulphur transfer. During gas stirring treatment, an emulsification of top slag takes place. A numerical model describing the course of the desulphurisation reaction has been developed, which takes all relevant process parameters into account, including those of the emulsification effect. To check the validity of the model, operational tests have been performed on 185‐t‐heats. Results obtained from model calculations and operational tests show an excellent agreement.