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通过对涟钢90 t顶底复吹转炉炉渣试验数据进行分析，结果表明：为了获得最佳的炉渣脱磷效果，炉渣碱度应控制在4.6左右，炉渣中w((FeO))控制在16%左右，炉温则控制在1680℃左右；通过对炉渣实际组成在 CaO (MgO)-SiO2-FeO(MnO)伪三元相图中的变化途径与常见的转炉渣成渣路线进行比较发现，涟钢顶底复吹转炉冶炼造渣操作遵循的是 ABC途径，即低氧化铁成渣路线，该路线主要适用于含磷、硫较低的生铁炼钢，通过分析讨论该成渣路线的利弊，提出一些优化该厂造渣工艺的建议。“,”Through the analysis of the experimental data of Liangang 90 t top-bottom combined blowing converter, the results show that in order to obtain the optimal dephosphorization effect,the basicity of slag should be controlled at around 4.6,w((FeO))be controlled at around 16%,and the furnace temperature be controlled at around 1 680℃.Through the change channels of actual slag compose in the CaO(MgO)-SiO2-FeO(MnO)fake ternary phase diagrams to compared with the common slag forming routes,it was found that the slag forming routes of Liangang top-bottom combined blowing converter followed the ABC path which is the low FeO slag forming route.The route is mainly applicable to the low phosphorus and sulphur pig iron which is used in steel smelting.By analyzing the ad-vantages and disadvantages of this route,this paper suggests some optimizations in the slag forming process of Lian-gang.