Lithofacies Phases Analysis of Cover Flux in Tundish for Rare Earth Treated Steel  

作　　者：姜茂发 姚永宽 刘承军 王德永 

机构地区：[1]College of Materials and Metallurgy Institute,Northeastern University

出　　处：《Journal of Rare Earths》2003年第S1期194-197,共4页稀土学报（英文版）

基　　金：ProjectsupportedbytheNationalNaturalScienceFoundationofChina (5 0 2 0 40 0 5 )andKeyResearchofChinaMinistryofEducation (0 10 5 7)

摘　　要：Lithofacies structure of commercial cover flux and experimental slags were analyzed,and states of rare earth oxides in cover flux were studied. The results show that under the experiment conditions,the mineral structures of original slags are mainly the calcium feldspar,a lot of magnesium olivine and Fe-bearing silicate. Rare earth oxides in the cover flux exist mainly as rare earth silicates. When the content of rare earth oxides reaches a certain value,rare earth oxides precipitate in molten cover flux. It means that the solubility of rare earth oxides is limited. Rare earth oxides may be partly substituted for CaO to form rare earth-silicate which may increase with the basicity reducing.Lithofacies structure of commercial cover flux and experimental slags were analyzed,and states of rare earth oxides in cover flux were studied. The results show that under the experiment conditions,the mineral structures of original slags are mainly the calcium feldspar,a lot of magnesium olivine and Fe-bearing silicate. Rare earth oxides in the cover flux exist mainly as rare earth silicates. When the content of rare earth oxides reaches a certain value,rare earth oxides precipitate in molten cover flux. It means that the solubility of rare earth oxides is limited. Rare earth oxides may be partly substituted for CaO to form rare earth-silicate which may increase with the basicity reducing.

关 键 词：metal materials lithofacies rare earth oxides cover flux in tundish rare earths 

分 类 号：TG174[金属学及工艺—金属表面处理]