含碳铬矿球团还原热力学研究  

RESEARCH ON REDUCTION THERMODYNAMICS OF CARBON-BEARING CHROMITE PELLETS

作　　者：徐荣军[1] 倪瑞明[1] 张圣弼[1] 马中庭[1] 

机构地区：[1]安阳钢铁公司,北京科技大学

出　　处：《烧结球团》1996年第3期1-4,共4页Sintering and Pelletizing

摘　　要：本文介绍了含碳西藏铬矿球团的还原顺序。Ｘ射线衍射证明：还原温度低于１２００℃时，还原产物是Ｆｅ及Ｃｒ_２Ｏ_３；还原温度高于１２００℃时，还原产物是Ｆｅ、Ｆｅ_３Ｃ、（Ｃｒ，Ｆｅ）_７Ｃ_３，在还原初期阶段生成的Ｆｅ转变成Ｆｅ_３Ｃ_，最终转变成（Ｃｒ，Ｆｅ）_７Ｃ_３；当还原温度高于１３００℃时，发现有ＭｇＡｌ_２Ｏ_４，ＭｇＳｉＯ_４生成，热力学计算的结果与Ｘ射线衍射结果相符。This paper point out the reduction sequence of carbon-bearing Tibet chromite pellets,X-ray diffraction analyce shows that: when the reduction temperature is lower than 1200℃,the reduction products are Fe and Cr_2O_3; when the temperature is higher than 1200℃,the products are Fe,Fe_3C and (Cr,Fe)_7C_3,Fe formed during the initial reduction was transformed to Fe_3C and to (Cr,Fe)_7C_3 eventually;there are MgAl_2O_4 and MgSiO_4 in the reduction products.The results of thermodynamic computation are a very close approximation to those of X-ray diffraction analyzis.

关 键 词：铬铁矿 含碳球团矿 直接还原热力学 

分 类 号：TF046.6[冶金工程—冶金物理化学]