中文摘要：

为了探究含碳球团还原熔分机理，将分析纯的 Fe2 O3、氧化物和不同还原剂固结成球并进行等温还原实验，研究了温度、还原时间、配碳量、还原剂种类等条件对球团还原熔分行为的影响.进一步采用 X 射线衍射、扫描电子显微镜等手段表征了含碳球团在不同还原时间的微观结构及物相变化.实验结果表明：焙烧温度过低或过高含碳球团都不能良好熔分，配碳量增加可以提高球团还原和熔分速率，适宜的温度、碳氧摩尔比、还原剂分别是1400℃、1.2和煤粉.含碳球团还原熔分包括直接还原反应、间接还原反应、碳的气化反应、渗碳反应和铁的熔化反应，最后实现渣铁分离.

英文摘要：

To explore the mechanism of reduction and melting-separation in carbon-bearing pellets, cold-bound pellets were made of analytically pure Fe2 O3 , oxides, and different reductants, and their isothermal reduction experiment was carried out. The influences of reduction parameters, such as temperature, reduction time, carbon/ oxygen mole ratio, and type of reductants, on the metallization degree and melting behavior were discussed on the basis of experimental data. The microstructure and phase transformation of the pel-lets were characterized by X-ray diffraction and scanning electron microscopy. It is found that the pellets cannot be molten well at too low or too high temperature. An increase in carbon/ oxygen mole ratio can improve the reduction and melting rate of the pellets. The ap-propriate temperature, carbon/ oxygen mole ratio, and reducing agent are 1400 ℃ , 1. 2, and pulverized coal, respectively. The reduc-tion and melting-separation reactions of the pellets contain direct reduction reaction, indirect reduction reaction, carbon gasification re-action, carburization reaction and iron melting reaction, and finally realize the separation of iron and slag.