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Vol.23, No.3, 209 ~ 219, 1985
Title
A Study on the Desulfurization of Molten Pig Iron by CaCO3 Based Flux Injection
민병진Byeoung Jin Min, 노광현Kwang Hyun Ryo, 강길원Gill Won Kang
Abstract
An injection method using CaCO₃powder and other additives as fluxes was employed for the desulfurization of molten pig iron. The results are as follows: 1. The injection method using CaCO₃powder appeared to have a very effective desulfurization by forming the porous and active fine CaO particles and stirring effect due to CO₂gas formed when CaCO₂gas formed when CaCO₃decomposed 2. Partially substituting of CaCO₃with CaO decreased the desulfurization degree as the content of CaO increase. This means that the ability of desulfurization of CaCO₃is superior to CaO. 3. All addition as reduction agent (deoxidizer) improved the desulfurization degree and this is attributed to the promotion of decomposition reaction of CaO into Ca＋O by lowering the oxygen chemical potential with formation of Al₂O₃. De-si and de-Mn reaction, however, were suppressed by the Al addition.
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