关键词: 铝热法, 高钒铁合金, 钒铁渣, 铝酸钙水泥, 胶凝性能, 浇注料

Abstract: Ferrovanadium slag was crushed and ball milled into micropowders with the specific surface area of 324,359,406 and 448 m²·kg^-1,respectively.The cementitious property of the prepared micropowders and calcium aluminate cement CA-70 was compared.It is found that the cementitious property of the ferrovanadium slag micropowder with the specific surface area of 406 m²·kg^-1 is equivalent to or even better than that of calcium aluminate cement CA-70.On this basis,cement-free ferrovanadium slag castables were developed.The effect of the addition of the ferrovanadium slag micropowder (the specific surface area of 406 m²·kg^-1) on the properties of the castables was studied.The on-site application of the castables was carried out at blast furnace slag spouts,slag hole nozzles and hot metal tanks.The results show that the ferrovanadium slag castable with 25 mass% ferrovanadium slag micropowder has better properties than the high alumina castables,achieving good on-site application effects.

Key words: aluminothermic process, high ferrovanadium alloy, ferrovanadium slag, calcium aluminate cement, cementitious property, castables