摘要
以煤矸石电厂循环流化床灰(CFB灰)为原料,研究了CFB灰中Fe2O3酸浸出过程的影响因素及其酸浸出过程动力学。试验结果表明:盐酸浓度20.2%、酸浸温度110℃、酸浸时间1.0h、液固比为4∶1,Fe2O3的浸出率为91.74%。在一定时间内,CFB灰加热酸浸过程符合典型的"反应核收缩模型"。其反应动力学方程可用1-(1-α)1/3=k′t来描述,反应表观级数为0.999 2,反应活化能为42.063kJ/mol,过程速率为化学反应速率控制。
Using the circulating fluid bed ash（CFB ash） generated in gangue power plant,this article studies the influencing factors in the acid leaching behavior and kinetics of ferric oxide from the circulating fluidized bed ash.The experimental result shows that the concentration of hydrochloric acid of 20.2%,the temperature 110℃,reaction time 1.0h,and liquid-to-solid ratio of 4：1,the leaching rate of ferric oxide is 91.74%.The acid heating and leaching process of CFB ash conforms to the typical ＂core shrinking model of reaction＂ in a certain time.Its equation of kinetics of reaction can be described by 1-（1-α）1/3=k ′t,the apparent reaction order is 0.999 2,the activation energy of the reaction is 42.063kJ/mol,while the process speed rate is controlled by the chemical reaction rate.
出处
《中国非金属矿工业导刊》
2011年第5期16-18,44,共4页
China Non-Metallic Minerals industry
基金
中国煤炭工业协会指导性计划项目(MTKJ2009-277)
辽宁省科学技术计划项目(2009402008)
辽宁省教育厅重点实验室项目(LS2010072)
关键词
循环流化床灰
酸浸
浸出率
动力学
circulating fluidized bed ash
acid leaching
leaching rate
dynamics
