Research for the Rate-determining Step of Metallurgy Kinetics for the Procedure of Thermal Reduction Sm₂O₃ with Metal La

General procedure of metallurgy kinetics for the procedure of thermal reduction of Sm₂O₃ with metal La is discussed in the paper. The rate-determining step of metallurgy kinetics is discussed under the temperature of making metal Sm. The way of boosting reaction pace is found through the test of La dregs analysis and optimize mixture material.