MnO2酸化によるBaO-BaCl2-MnO系フラックスを用いた高Mn溶鉄の脱りん
1996 年 82 巻 2 号 p. 123-128
詳細
1996 年 82 巻 2 号 p. 123-128
Dephosphorization process of high manganese molten iron with BaO-BaCl2-MnO flux by oxidation of MnO2, includingslag recycle system, was investigated in a laboratory scale test.
By using BaO-BaCl2 flux of 100kg/t and MnO2 of 10-15kg/t, dephosphorization yield of 70% was achieved at 1400°C, if the molten iron with manganese content of 18 mass% has carbon content of 2 mass%. To get satisfactory dephosphorization, (BaO)/(BaCl2) mass% ratio in the slag should be controlled to 50/50-70/30, MnO content in the slag to 20 mass%, and (BaO)/(SiO2) mass% ratio should be larger than 15. Phosphate capacity of the slag was calculated to be 1022.9-1023.3.
Also, it is considered possible to use the slag repeatedly for dephosphorization by subsequent reduction of P2O5 in BaO-BaCl2 slag with carbon at 1600°C.
