铬矿在CaO-SiO_2-MgO-Al_2O_3渣系溶解的动力学模型  

Kinetic Model for Dissolution of Chromium Ore in CaO-SiO_2-MgO-Al_2O_3 Slag System

作　　者：刘岩[1] 姜茂发[1] 王德永[1] 许力贤[1] 

机构地区：[1]东北大学材料与冶金学院,辽宁沈阳110004

出　　处：《东北大学学报（自然科学版）》2007年第6期825-828,共4页Journal of Northeastern University(Natural Science)

基　　金：国家自然科学基金资助项目(50374029)

摘　　要：为了更好地揭示转炉内铬矿熔融还原机理,测定了一定形状的天然铬矿在CaO-SiO2-MgO-Al2O3渣系中的溶解速率,运用宏观动力学原理建立了用于描述铬矿溶解过程的动力学模型.结果表明:在本实验条件下,铬矿在CaO-SiO2-MgO-Al2O3渣系中溶解过程由其表面溶解反应控制,反应温度对铬矿溶解反应速率常数的影响显著,计算得到的溶解活化能为524.52 kJ/mol;随着反应温度的升高,铬矿在渣中的溶解速率增大.To reveal in depth the smelting/reduction mechanism of chromium ore in converter, the dissolution rate of natural chromium ore in definite shape in CaO-SiO2-MgO-Al2O3 slag system was determined, and a kinetic model for its dissolution process was developed on macrokinetics theory. The results showed that the dissolution process of chromium ore is controlled by the surface dissolution reaction on conditions of the experiments we did, where the temperature has significant effect on the reaction rate constant of chromium ore dissolution. The calculated value of dissolution activation energy is 524.52 kJ/mol. The dissolution rate of chromium ore in slag increases with reaction temperature.

关 键 词：铬矿 溶解 动力学模型 温度 活化能 

分 类 号：TF4[冶金工程—钢铁冶金]