介绍了100t转炉应用脱磷预处理直炼工艺提高终点命中率的生产实践。在冷料比为20%、25%、28%条件下，通过优化脱磷、脱碳期供氧和造渣工艺，脱磷期耗氧比从传统工艺的20%～30%提高到30%～50%，脱碳期渣料加入量控制在8～15 kg.t-1。50炉工业试验结果表明，脱碳期一倒温度达到常规冶炼控制水平，一倒[C]、[P]控制水平明显好于常规冶炼工艺。

The present paper introduces the practice of improving the end point target-hitting by adoption of hot metal dephosphorizing pretreatment and direct steel-making process in 100t converter. Cold smelting charge ratio was respectively 20%,25%,28%, by optimizing slag making and oxygen blowing process of dephosphorizing pretreatment period and decarburizing period，oxygen consumption rate increased from 20～30% to 40～50% than conventional process in dephosphorizing pretreatment period and slag charge was controlled at 8～15kg.t-1 in decarburizing pretreatment period. Fifty heats industrial test results indicated that temperature controlling at first slag off achieve the level of conventional smelting process, the controlling levels of [C] and [P] were significantly better than conventional smelting process.