Effect of Additives on Desulfurization Capability of CAS-OB Refining Ladle Slag

Hong Ming Wang; Ting Wang Zhang; Li Li Yang; Yong Qi Yan; Hua Zhu

doi:10.4028/www.scientific.net/AMR.311-313.962

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 311-313Effect of Additives on Desulfurization Capability...

Effect of Additives on Desulfurization Capability of CAS-OB Refining Ladle Slag

Abstract:

To avoid slag sticking onto the ladle snorkel during the CAS-OB refining and alloying process, CaO-B₂O₃ and CaO-CaF₂ were respectively employed as modifiers added into the ladle slag. The desulfurization capability of modified slag was investigated. The results of experiments on sulphur partition equilibrium between metal and slag indicate that the sulphur content of metal can be further decreased by the modified slag. When CaO-B₂O₃ is used as additive and the mass ratio of CaO to B₂O₃ is 1:1, the desulfurization ratio of slag to liquid steel is 50%, the final sulphur content can be controlled at 0.002%. The efficiency of desulfurization is fine. When CaO- CaF₂ is employed as additive and the mass ratio of CaF₂ to CaO is 2:8, the final sulphur content of metal can be controlled lower than 0.004%, the efficiency of desulfurization is also acceptable.

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Advanced Materials Research (Volumes 311-313)

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962-965

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.311-313.962

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Online since:

August 2011

Authors:

Hong Ming Wang, Ting Wang Zhang, Li Li Yang, Yong Qi Yan, Hua Zhu

Keywords:

Boron Oxide, Calcium Fluoride, Cas-OB, Desulfurization Capability, Ladle Refining

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