Effect of Effective Concentration of High Melting Point Phases in RH Refining on Slag Sticking
LIANG Xiao-ping JIN Yang WANG Yu DUAN Hong-ling
College of Materials Science and Engineering , Chongqing University College of Materials Science and Engineering , Chongqing University College of Materials Science and Engineering , Chongqing University College of Materials Science and Engineering , Chongqing University
Abstract：To avoid crystallization of high melting point phases in refining slag, such as MgO×Al2O3 and FeO×Al2O3, during RH refining process, a calculation model of effective mass concentration for CaO-SiO2-MgO-Al2O3-MnO-FeO-CaF2 slag system was established based on the coexistence theory of slag structure, and the influences of slag components on effective concentrations of high melting point phases were studied. The results show that when slag basicity is more than 4, CaO/Al2O3 between 1.5 and 2.0, MgO content about 10%, FeO content about 17%, and CaF2 content less than 7.5%, the effective concentrations of MgO×Al2O3 and FeO×Al2O3 are at low level, MgO×Al2O3 and FeO×Al2O3 could not be crystallized from the refining slag. In this case, the slag sticking on RH immersion tube can be reduced. The calculation results are consistant with those of experiments, which may supply the theoritical basis for devolopment of slag sticking free modifying agent of RH refining slag.
梁小平 金杨 王雨 段红玲. RH精炼渣高熔点相作用浓度对粘渣的影响[J]. , 2009, 9(2): 324-328.
LIANG Xiao-ping JIN Yang WANG Yu DUAN Hong-ling. Effect of Effective Concentration of High Melting Point Phases in RH Refining on Slag Sticking. , 2009, 9(2): 324-328.
2009, Vol. 9 
