岩石矿物学杂志2017，Vol.36Issue(6)：873-880,8.
溶出珊瑚砂中Ca2+、Mg2+的动力学实验研究及其影响因素
A kinetic study of leaching of Ca2 + and Mg2 + by coral sand and its influence factors
摘要
Abstract
In order to discuss and determine the dissolution kinetics law and influence factors of the dissolution of Ca2 + and Mg2 + in coral sand,the authors conducted dissolution experiments of Ca2 + and Mg2 + in aqueous solution under different conditions of the solid-liquid ratio,the rotational speed of the shaker,the particle size of coral sand,the temperature,the pH value,and the salt content of the solution.The results show that Ca2 + and Mg2+ dissolution in coral sand gradually increased with the reaction time,and the higher the speed,solid-liquid ratio and temperature,the greater the dissolution of Ca2 + and Mg2 +,and the lower pH value is beneficial to the dissolution of Ca2+ and Mg2+.When particle size of coral sand is 2.36～4.75 mm,and the salt content is 100 mg/L,the dissolution amount of Ca2+ and Mg2 + reaches the maximum.The statistical analysis shows that the rotational speed,temperature and solution pH have significant influence on the dissolution of coral sand,whereas the pH value among them seems to be the greatest influence factor.Kinetic studies show that the dissolution of coral sand in water is consistent with the internal diffusion model of shrinking nuclei,which suggests that internal diffusion rate is the decisive factor controlling the dissolution reaction.In addition,from 15℃ to 40℃,the dissolution activation energy of Ca2+ and Mg2+ in coral sand is 78.07 kJ/mol and 74.91 kJ/mol respectively.关键词
珊瑚砂/Ca2+、Mg2+溶出/动力学模型/影响因素Key words
coral sand/dissolution of Ca2 + and Mg2 +/kinetic modeling/influence factors分类
矿业与冶金引用本文复制引用
万天琦,赵志伟,敖漉,刘杰,彭伟..溶出珊瑚砂中Ca2+、Mg2+的动力学实验研究及其影响因素[J].岩石矿物学杂志,2017,36(6):873-880,8.基金项目
军队后勤重点科研项目(BY115C002) （BY115C002）
Military Logistics Key Scientific Research Projects(BY115C002) （BY115C002）
