Effect of BI on Viscous Characteristics of Mold Powder

By rotating viscometer,the relationships among the viscosity,solidification temperature,activation energy of slags,R and BI are studied.Under the present experimental conditions,the viscosity,solidification temperature and activation energy of mold powder all decrease with increasing BI and,meanwhile,the effect of BI on viscous characteristics of mold powder gradually weakens.Using such regressive relationships,the effects of all components on viscous characteristics of mold powder are investigated to predict accurately the viscous characteristics of mold powder.The results show that when BI is 2.0,the viscosity,solidification temperature and activation energy of mold powder are 0.17?Pa·s,1?030?℃ and 120?kJ·mol~(1),respectively.As known,BI of mold powder should be over 2.0 to keep the stable viscous characteristics of mold powder.