中文摘要：

在热力学分析的基础上，研究了碳热还原硼铁矿过程中硼、镁的还原挥发行为．实验表明，试样的总失重率随着温度的升高而增大，在140～1450℃时很快达到最大值61．8％．B203始终存在着挥发失重，最大失重率达37．9％，MgO最大失重率达98．0％．炉管口处的沉积物中B2O3含量为12．49％，证实了硼、镁的挥发现象．

英文摘要：

Based on thermodynamic analysis, the reduction and volatilization of B2O3 and magnesium in ludwigite were studied using earbothermal reduction method. The experimental results show that the mass loss rate of the sample increases with increasing temperature. The maximum mass loss rate of the sample is 61.8% from 1400 to 1450℃. B2O3 is continuously reduced and volatilized during the experimental process. From 1400 to 1450℃, the mass loss rate of B2O3 is 37.9%. The mass loss rate of MgO is 98.0%. The content of B2O3 in the deposite reached 12.49%, determined by chemical analysis. The result of study shows the volatilization of boron oxide and magnesia from ludwigite.