硫酸分解硼泥反应的热力学及动力学(英文)  

Thermodynamics and Kinetics of Boron Mud Dissolution in Sulfuric Acid

作　　者：马玺[1,2] 马鸿文[1] 刘梅堂[1] 姚文贵 

机构地区：[1]中国地质大学(北京)材料科学与工程学院,北京100083 [2]昊青薪材(北京)技术有限公司,北京100083

出　　处：《硅酸盐学报》2014年第2期254-260,共7页Journal of The Chinese Ceramic Society

基　　金：国家自然科学基金(40802013)资助项目

摘　　要：辽宁大石桥某硼砂厂排放的硼泥尾渣的主要矿物成分为54.0%橄榄石、29.5%菱镁矿及5.6%金云母。对硫酸分解硼泥反应体系进行了热力学与动力学分析。结果表明:硼泥中所有矿物成分均能自发地在硫酸溶液里分解,在298.15K时反应总热为-150.81kJ/mol;硫酸分解硼泥反应体系符合内扩散和化学扩散控制。The raw material boron mud, as a solid waste in a borax factory in Dashiqiao, China, contains some minerals like olivine of 54.0% （in mass fraction, the same below）, magnesite of 29.5%, and phlogopite of 5.6%. The thermodynamic analy- sis indicates that all the minerals in the boron mud powder can be dissolved in sulfuric acid, and the total reaction heat is --150. 81 kJ/mol at 298. 15 K. The kinetics analysis of dissolving the boron mud powderr at 313,333 and 353 K for 0.5--4 h reveals that the process of dissolving boron mud in sulfuric acid follows internal diffusion-control and chemical reaction-control proeedures.

关 键 词：硼泥 分解 热力学 动力学 

分 类 号：TD985[矿业工程—选矿]