论文部分内容阅读
介绍了用体系的初、终态浓度,结合反应过程还原剂失重速度测定动力学参数的方法,测量了周体碳还原熔融PeO-CaO—SiO_2-MgO和FeO-CaO-SiO_2两种渣系中FeO的还原速度。结果表明,在本试验条件下测出的还原反应速度是总(FeO)重量百分浓度的表观一级反应,表观活化能为53.174kcal/mool。在本试验范围内,测得固体碳还原熔融氧化铁的经验速度方程式为: 还原反应的速度限制步骤是FeO热量向反应界面的对流扩散和气泡脱离石墨表面。发现添加少量碱金属氧化物能十分显著地加快碳还原熔融氧化铁的速度。
The kinetic parameters of the system were measured by using the initial and final concentrations of the system and the weight loss rate of the reductant in the reaction process. FeO reduction rate. The results showed that the reduction reaction rate measured under the conditions of this experiment is an apparent first order reaction with a weight percentage of total (FeO) with an apparent activation energy of 53.174 kcal / mol. Within this test range, the empirical velocity equation for the determination of solid carbon-reduced molten iron oxide is: The rate-limiting step of the reduction reaction is the convective diffusion of FeO heat to the reaction interface and the bubble detachment from the graphite surface. It has been found that the addition of a small amount of alkali metal oxide significantly accelerates the rate of carbon reduction of the molten iron oxide.