碳热还原硫酸钡反应热力学及动力学研究  

Thermodynamics and kinetic study on barium sulfate reaction of carbothermic reduction

作　　者：陈琨[1] 张煜[1] 张怡[2] 卢俏 廖裕辉 

机构地区：[1]贵州大学化学与化工学院,贵州贵阳550025 [2]贵州省冶金化工研究所,贵州贵阳550002 [3]贵州省建材产品质量监督监察院,贵州贵阳550002

出　　处：《化工矿物与加工》2017年第5期24-28,共5页Industrial Minerals & Processing

摘　　要：对碳热还原硫酸钡反应过程进行了热力学分析和动力学研究,结果表明:碳热还原硫酸钡反应在高温阶段主要由碳气化产生的CO与硫酸钡粒子发生反应,升高温度有利于提高反应速度、缩短反应时间;在物料配比(以质量计)为硫酸钡∶无烟煤=4∶1,硫酸钡粒度过200目,无烟煤过80目,反应温度为850~1 000℃时,还原反应过程的限制性环节是界面化学反应,表观活化能为183.69kJ/mol,动力学方程可由Erofeev方程ln[-ln(1-x)]=nlnt+lnk表示。The thermodynamics and kinetics of barium sulfate reaction of carbothermic reduction was studied. The results showed that the barium sulfate reaction of carbon thermal reduc- tion at the high temperature stage was mainly by reaction of CO produced by earhon gasification and barium sulfate particles with higher temperature to improve the reaction rate and to reduce the reaction time. With the material ratio in terms of mass being bar- ium sulfate and anthracite 4 ： 1 with the barium sulfate particle size of 200 mesh and the anthracite particle size 80 mesh and the reaction temperature ranging from 850 to 1000 ℃, the critical link of reduction reaction rate is the interface chemical reaction , the apparent activation energy is 183.69 kJ/mol and the kinetic e- quation can be expressed with Erofeev Equation ln[-ln （1-x）]=nlnt＋lnk .

关 键 词：碳热还原 硫酸钡 热力学 动力学 

分 类 号：TQ132.35[化学工程—无机化工]