CAJ | 학술논문

采用物料氧化镁还原率、XRD、SEM 等手段与方法研究真空条件下煅白碳热还原温度、物料配比、碳热还原保温时间等对碳热还原煅白制取金属镁工艺的影响。结果表明：在30~100 Pa时，碳热还原温度高于1623 K后，氧化镁的还原率明显增加，有利于碳热还原反应的进行。随着焦煤还原剂与氧化镁摩尔比的增大以及碳热还原时间的延长，碳热还原反应反应速率加大，还原率提高，当碳热还原温度为1623 K、还原时间为4 h、配碳比为1.6时，氧化镁还原率超过99%。因此，选择适当的焦煤还原剂与氧化镁摩尔比值以及碳热还原时间，在温度高于1623 K条件下，将有利于碳热还原法炼镁过程的顺利进行与氧化镁还原率的提高。
채용물료양화미환원솔、XRD、SEM 등수단여방법연구진공조건하단백탄열환원온도、물료배비、탄열환원보온시간등대탄열환원단백제취금속미공예적영향。결과표명：재30~100 Pa시，탄열환원온도고우1623 K후，양화미적환원솔명현증가，유리우탄열환원반응적진행。수착초매환원제여양화미마이비적증대이급탄열환원시간적연장，탄열환원반응반응속솔가대，환원솔제고，당탄열환원온도위1623 K、환원시간위4 h、배탄비위1.6시，양화미환원솔초과99%。인차，선택괄당적초매환원제여양화미마이비치이급탄열환원시간，재온도고우1623 K조건하，장유리우탄열환원법련미과정적순리진행여양화미환원솔적제고。
The temperature of calcined dolomite carbothermic reduction, molar ratio and carbothermic reaction time by calcined dolomite carbothermic reduction in vacuum were investigated by MgO reduction rate, XRD and SEM. The results show that the reduction rate of MgO clearly increases when temperature is higher than 1 623 K at 30?100 Pa, which is beneficial to MgO carbothermic reaction. The carbothermal reduction reaction rate increases with the increase of the molar ratio of coking coal reductant and magnesium oxide and carbon thermal reduction time at the carbon thermal reduction temperature of 1 623 K, the reduction time of 4 h and carbon ratio of 1.6, the magnesium oxide reduction rate is over 99%. Therefore, selecting the appropriate molar ratio of coking coal reductant and magnesium oxide and carbon thermal reduction time is beneficial to carbothermal reduction process for magnesium smelting going smoothly and magnesium oxide reduction rate increasing at the temperature higher than 1 623 K.