The equilibrium distribution ratios of Nb and Ta, namely L_Nb and L_Ta, seem to be substantially independent of both the basicity and the CaF_2 contents in slag, but markedly affected by the reaction temperature.

• 炉渣碱度和炉渣中之氟化钙含量对铌、钽在渣铁间的平衡分配比值L_(Nb)及L_(Ta)均无明显影响；反应温度对L_(No)及L_(Ta)值影响甚大.