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.
出处
《硅酸盐学报》
EI
CAS
CSCD
北大核心
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
关键词
硼泥
分解
热力学
动力学
boron mud
dissolution
thermodynamics
kinetics
