探讨了双联转炉法(MURC)炼钢工艺特性，开发了适应福建三钢闽光股份有限公司低铁水比转炉炼钢生产要求的新型MURC炼钢工艺制度. 结果表明，新型MURC炼钢工艺的控制重点是促进脱磷期石灰熔化，应根据铁水Si含量计算石灰加入量，以促进石灰熔化及碱度控制；根据该公司低铁水比的冶炼特点，脱磷期温度应在1330~1360℃；目标碱度及炉渣总铁量应适当降低，以满足冶炼反应动力学要求. 新工艺出钢C平均含量为0.183%，P平均含量为0.0183%，平均脱磷率达90%，钢铁料消耗较常规工艺平均降低2.3 kg/t，石灰消耗平均降低11.2 kg/t.

The technical characteristics of multi-functional refining in converter (MURC) were studied, an new MURC smelting process under low hot metal ratio to meet the actual production conditions in Fujian Sansteel Minguang Co., Ltd. was developed. The results show that promoting the melting of lime during dephosphorization period is the key step for new MURC process. Adjusting the charging amount of lime according to the Si content in hot metal is helpful to controlling the melting of lime and slag basicity. Under the condition of low hot metal ratio, in order to catch the kinetic requirements of smelting reaction in dephosphorization period, higher smelting temperature in 1330~1360℃ should be required, and the target slag basicity and total Fe content in slag should be lower compared with conventional process. The industrial tests of new MURC process show that average tapping C content of smelted steel is 0.183%, and average tapping P content 0.0183%, and average dephosphorization rate more than 90%. At the same time, compared with conventional process, the new MURC process saves the consumption of steel material about 2.3 kg/t and consumption of lime 11.2 kg/t averagely.