根据化学分析和矿物组成的特征．对转炉铁钒土、萤石造渣工艺的炉渣变化及形成机理进行了研究。研究结果表明，ＬＤ转炉冶炼过程中．炉渣物相组成呈一定规律变化，其变化规律与石灰熔解速度有关，石灰熔解速度取决于炉内温度及白灰质量和助熔剂的种类。铁钒土造渣完全可以取代萤石造渣，为实现ＬＤ转炉采用无萤石造渣工艺提供了必要的依据。 Based on chemical analysis and mineral composition characteristics. The changes of iron-bearing bauxite and the slag of fluorite slag-making process and the formation mechanism were studied. The results show that during the LD converter smelting process. The phase composition of slag changes regularly, and its variation is related to lime melting rate. The melting rate of lime depends on the temperature in the furnace and the quality of white ash and the type of flux. Iron-vanadium slag can completely replace the fluorite slagging, in order to achieve the LD converter using the fluorite slag-free process provides the necessary basis.