含碳球团还原过程动力学及模型

本文研究了不同条件下含碳球团在Ｎ_２气氛中的还原过程．结果发现，球团中心的还原速度大于其边缘速度，固相反应Ｆｅ_ｘＯ_ｙ＋ｙＣ＝ｘＦｅ＋ｙＣＯ不是含碳球团还原过程的主要反应；以往的含碳球团还原过程模型不能正确地描述其反应过程．本文提出了含碳球团还原过程的新观点，并以此观点为基础建立了含碳球团还原过程模型，试验证明该模型能很好地描述含碳球团的还原过程．

KINETICS AND MATHEMATICAL MODEL FOR REDUCTION PROCESS OF IRON ORE BRIQUETTE CONTAINING CARBON

The reduction process of iron ore briquette containing C(ICB) was investigated under different conditions in nitrogen atmosphere. It was found that the reduction rate in the center part of ICB was faster than that in the rim. According to this phenomenon, it can be believed that the solid reaction of Fe_xOy+yC =xFe+yCO is not the main reduction process and the previous model described process could not explain the real process exactly. In this paper, a new opinion on the reduction process was put forward and a new mathematical model was established for ICB reduction process. It was proved by experiments that the new model fits the reduction process quite well.