The  test   and   study   on   dephosphorization   of  0.12～0.40C

10.06～18.89Cr

0.60～11.00Ni  molten stainless steel at refining temperature between 1853 K and 1893 K has been carried out in a 5 kg medium frequency induction furnace with MgO crucible by using 45~65BaO

35～55BaF₂

3~7 Cr₂O₃ slag series. The test results showed that the phosphorus content in molten high chromium stainless steel in refining period decreased to 0.013% from 0.029% by using the test slag series

the dephosphoriing ratio was more than 20%;and as(BaO)/(BaF₂)was 60/40

initial silicon content  in   steel   ≤0.08%

refining   temperature   ≤1600℃ (1873K) and   initial   [Cr]%≤15%

the   beter   dephosphorization effect of molten high chromium stainless steel could be obtained.