【摘要】 对锆英砂在氢氧化钠亚熔盐中的分解动力学进行研究,考察反应温度、反应时间、Na OH含量、搅拌速度、碱矿比等因素对锆英砂分解率的影响。研究结果表明:锆英砂的分解率随反应温度、反应时间和NaOH含量的增加而增加。分解过程符合缩核模型,界面化学反应为控制步骤,表观活化能为77.98k J/mol,最佳实验条件下的转化率高于99%,分解产物为硅锆酸钠（Na₂ZrSiO₅）。更多还原

【Abstract】 Sub-molten salt was applied to the decomposition of zircon sand（ZrSiO₄）. The kinetics of the decomposition of zircon sand and the effects of reaction temperature, reaction time, NaOH content, agitation speed, and the NaOH/ore mass ratio on the decomposition rate of zircon sand in Na OH sub-molten salt were investigated. The results indicate that the decomposition rate of zircon sand increases with the increase in the reaction temperature, reaction time, and NaOH content. The shrinking-core model with surface chemical reaction-controlled process is the most applicable for the decomposition of zircon sand, with the apparent activation energy of 77.98 kJ/mol. The decomposition product is sodium zirconium silicate（Na₂ZrSiO₅）, and the decomposition rate is higher than 99% under the optimal conditions.更多还原