| 摘要 |
1390814 Desulphurizing agent AIKOH CO Ltd 5 May 1972 [8 May 1971] 21102/72 Heading C7M A desulphurizing agent for molten pig iron comprises in wt per cent. 32-65 Na2 CO 3 , 5-45 NaOH and 10-30 water. It may also contain up to 20 CaCO 3 and/or Ca (OH) 2 , up to 18 of at least one of Ca B 4 O 7 À 6H 2 O, CaB 4 O 7 À 4H 2 O, Na 2 B 4 O 7 , Na 2 B 4 O 7 À 1DH 2 O, or CaF2 and 4-12 of Portland cement, blast furnace cement, white cement, iron cement or alumina cement. The agent is formed by mixing the components in air, preferably for 5-15 mins. until a part or the whole of the NaOH is converted to Na 2 CO 3 . The desulphurizer is either added to the ladle prior to adding the molten pig iron or to the pig iron while it is being blown with nitrogen. |
