Properties Control of Mold Fluxes for High Aluminum Steel
During continuous casting of high aluminum steel,composition and properties of mold fluxes change obviously due to the slag-steel reaction.In present work,slag-steel reaction characteristics were analyzed by thermoynamics calculation.The result shows that content of SiO_2 in mold fluxes should be limited in a reasonable range to reduce the reaction between steel and slag,and the reduction of SiO_2 can be inhibited by adding MnO to the mold fluxes.In order to maintain stability of mold fluxes after absorbing Al_2O_3,mold fluxes with high basic and high glassy phase were used.The industrial experiments demonstrated that the melting point and viscosity of mold fluxes for high aluminum steel varied little after absorbing inclusion,the good surface and subsurface quality of casting strands was achieved,which can meet the demand of continuous casting high alumiriam steel.
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