Investigation on the Reduction Kinetics of Carbon Addition to Baiyan Obo Barun Ore by TG-MS Analysis

Taking Baiyan Obo Barun ore as raw material,the carbon reduction process and its kinetics had been studied by by TG-MS analysis under 1 323~1 573 K,and the different minerals activation energy in the reduction process with the carbon gasification reaction as controlling process had been investigated. The present results indicate that the carbon reduction process of Baiyan Obo Barun ore is divided into three stages which are corresponding to three temperature ranges. According to Arrhenius equation,activation energy of the carbon gasification reaction and the gas diffusion was calculated at 96.8 kJ/mol and 76.5 kJ/mol respectively. It is thus concluded that the carbon reduction was controled by carbon gasification reaction under the investigated conditions. In addition,compared with results of Fruehan,Donskoi and other researchers the calculated activation energy of Baiyan Obo Barun ore is relatively low when taking the carbon gasification reaction as controlling process.