Kinetics of carbonated decomposition of hydrogarnet with different silica saturation coefficients

作     者：Xiao-feng Zhu Ting-an Zhang Guo-zhi Lü Xiao-feng Zhu;Ting-an Zhang;Guo-zhi Lü

作者机构：State Key Laboratory of Advanced Processing and Recycling of Nonferrous MetalsLanzhou University of TechnologyLanzhou 730050China School of Material Science and EngineeringLanzhou University of TechnologyLanzhou 730050China Key Laboratory for Ecological Metallurgy of Multimetallic Mineral(Ministry of EducationNortheastern UniversityShenyang 110819China Special Metallurgy and Process Engineering InstituteSchool of MetallurgyNortheastern UniversityShenyang 110819China 

出 版 物：《International Journal of Minerals,Metallurgy and Materials》 (矿物冶金与材料学报（英文版）)

年 卷 期：2020年第27卷第4期

页      面：472-482页

核心收录：

学科分类：081702[工学-化学工艺] 08[工学] 0817[工学-化学工程与技术] 

基　　金：the National Natural Science Foundation of China(Nos.51874078,U1710257,U1202274,and 51764039) the Open Fund of Key Laboratory for Ecological Metallurgy of Multimetallic Mineral(Ministry of Education) Northeastern University,China(No.NEMM2019004) 

主　　题：Bayer red mud hydrogarnet calcification carbonation kinetics silica saturation coefficient 

摘      要：Carbonated decomposition of hydrogarnet is one of the vital reactions of the calcification–carbonation method,which is designed to dispose of low-grade bauxite and Bayer red mud and is a novel eco-friendly *** this study,the effect of the silica saturation coefficient(x)on the carbonation of hydrogarnet was investigated from the kinetic *** results indicated that the carbonation of hydrogarnets with different x values(x=0.27,0.36,0.70,and 0.73)underwent two stages with significantly different rates,and the kinetic mechanisms of the two stages can be described by the kinetic functions R3 and *** apparent activation energies at Stages 1 and 2 were 41.96–81.64 and 14.80–34.84 kJ/mol,***,the corresponding limiting steps of the two stages were interfacial chemical reaction and diffusion.