以Al-Si-Fe合金为还原剂,采用真空热还原白云石煅白制取金属镁。通过对还原温度、还原时间、还原剂过量系数、制团压力以及氟盐的添加对还原过程的影响分析,确定本工艺最佳工艺条件为:还原温度1413 K、还原时间120 min、真空度4 Pa、还原剂过量10%、制团压力150 MPa、CaF2添加量为3%。在该条件下金属镁还原率为91.3%,产品纯度达到99.1%。 Al-Si-Fe alloy as a reducing agent, vacuum thermal reduction dolomite calcined white metal magnesium. Through the reduction temperature, reduction time, reductant excess coefficient, the system pressure and fluoride salt added on the reduction process analysis to determine the optimum process conditions for the process: the reduction temperature of 1413 K, the reduction time of 120 min, the degree of vacuum 4 Pa, excessive reductant 10%, system pressure 150 MPa, CaF2 dosage 3%. In this condition, the reduction rate of magnesium metal was 91.3%, the purity of the product reached 99.1%.