碳包覆钒钛磁铁矿粉非等温还原动力学  

Non-isothermal reduction kinetics of carbon-coated vanadium-titanium magnetite powder

作　　者：高一策 郝素菊 蒋武锋 张玉柱 薄荷 Gao Yice;Hao Suju;Jiang Wufeng;Zhang Yuzhu;Bo He(School of Metallurgy and Energy,North China University of Science and Technology,Ministry of Education Key Laboratory of Modern Metallurgy Technology,Tangshan 063009,Hebei,China;Department of Materials Engineering,Tangshan Vocational College of Science and Technology,Tangshan 063001,Hebei,China)

机构地区：[1]华北理工大学冶金与能源学院,现代冶金技术教育部重点实验室,河北唐山063009 [2]唐山科技职业技术学院材料工程系,河北唐山063001

出　　处：《钢铁钒钛》2023年第1期111-118,共8页Iron Steel Vanadium Titanium

基　　金：国家自然科学基金(51274084);河北省自然科学基金(E2018209323)。

摘　　要：为了准确探究钒钛磁铁矿粉碳还原反应的动力学,试验采用水热法,在不添加任何改性剂的情况下,以葡萄糖为碳源制备出了碳包覆钒钛磁铁矿粉,并利用高温综合热分析仪分别测量了5、7.5、10、12.5、15 K/min五种不同升温速率下的碳包覆钒钛磁铁矿粉的升温失重曲线。结合FWO公式和Coats-Redfern(CR)公式计算试验数据,进而计算碳包覆钒钛磁铁矿粉的动力学相关参数。结果表明:在一定温度区间内碳包覆钒钛磁铁矿粉的失重率与碳包覆量和升温速率成正比,此反应中的活化能约为73.533 kJ/mol,其反应机理是三级化学反应的模型。To accurately explore the dynamics of carbon reduction reaction of vanadium-titanium magnetite powder, the test was conducted by hydrothermal method without adding any modifier. Carboncoated vanadium-titanium magnetite powder was prepared with glucose as carbon source. The heating curves of weightlessness of carbon-coated vanadium-titanium magnetite powder obtained under different heating rate of 5, 7.5, 10, 15, 12.5, 1 5 K/min were measured by high temperature comprehensive thermal analyzer. Combined with the FWO formula and CR formula, the experimental data were calculated,as well as the kinetic parameters of carbon-coated vanadium-titanium magnetite powder. The results show that the weight loss rate of carbon-coated vanadium-titanium magnetite powder in a certain temperature range is proportional to the amount of carbon coating and the heating rate. The activation energy in this reaction is about 73.533 kJ/mol with a reaction mechanism of tertiary chemical reaction model.

关 键 词：钒钛磁铁矿粉 非等温还原 碳包覆 动力学 

分 类 号：TF55[冶金工程—钢铁冶金]