Evaluation of Thermal Behavior through Mold Flux Layer near the Meniscus during Continuous Casting of Steels
One of the important functions of mold flux is to prevent surface defects on final steel product by controlling the heat transfer rate below its critical in a continuous casting mold.In order to develop a novel technology to control the mold heat transfer rate without deterioration the lubrication,the extinction coefficient of glass film has been investigated to clarify the possibility of considerable decrease of overall mold heat transfer rate by decrease of thermal radiation through liquid layer of mold flux.This research study concerns about investigating heat flux density in commercial CaO-SiO2-Na2O based mold fluxes which have different basicity; 0.76,0.94,1.14 and 1.34 and various oxides; NiO contents.It is found that extinction coefficient of nickel oxide contained mold flux shows higher quantity than that of other fluxes.This result attributes scattering effect of metallic nickel particle which has been reduced by graphite crucible and nickel oxide during melting process of nickel oxide containing mold flux.In the consideration of extinction coefficient,concerning about the mold flux with transition metal oxides is the factor that affects heat transfer density through mold flux film near meniscus in terms of extinction coefficients.
continuous casting heat transfer mold flux extinction coefficient scattering effect
Dae-Woo YOON Jung-Wook CHO Seon-Hyo KIM
Department of Materials Science and Engineering,Pohang University of Science and Technology(POSTECH) Graduate Institute of Ferrous Technology(GIFT),Pohang University of Science and Technology(POSTECH),
国际会议
the 6th International Congress on the Science and Technology of Steelmaking,ICS2015(第六届国际炼钢科技大会)
北京
英文
588-591
2015-05-12（万方平台首次上网日期，不代表论文的发表时间）