某铀矿酸法堆浸尾渣中和试验和动力学方程模拟  

Study on kinetic equation simulation and neutralization experiment of acid tailings by heap leaching from one uranium mine

作　　者：孟舒[1] 钟平汝[1] 王高山[1] 吴永永[1] 常喜信[1] 王聪颖[1] 

机构地区：[1]核工业北京化工冶金研究院,北京101149

出　　处：《铀矿冶》2015年第3期184-188,共5页Uranium Mining and Metallurgy

摘　　要：以江西某铀矿新卸酸法堆浸尾渣为研究对象,结合尾渣的粒度分布、孔隙率及孔容等表征结果,研究了石灰和氢氧化钠与尾渣中余酸中和过程中pH值随浸泡时间的变化规律,并归纳出该尾渣的中和动力学模型。试验表明,尾渣中和终点pH值随碱用量的增加而上升,但过高的碱用量会使中和过程pH值的稳定性下降;此外,石灰的中和效果与氢氧化钠相当,且使用量不大,因此采用石灰作为中和试剂进行堆浸尾渣处置经济效益更好。Used a newly dumped uranium ore railings by acid heap leaching from one uramum mine in Jiangxi province as research subject, and combination of the characterization of size distribution, po- rosity, pore volume of the tailings, the pH transformation rule in neutralization tailings process by NaOH and lime was studied, and the kinetic equation simulation was also summed up. The result shows that the increase of the assumption of alkali lead to the higher pH, overdose of alkali will re- duce the stability of the neutralization system. Besides, the neutralization achievement by lime is al- most got the same result as that by NaOH with little dosage, therefore, better economic efficiency is achieved by lime neutralization to process the tailings by acid heap leaching.

关 键 词：铀堆浸尾渣 中和 动力学 微观结构 

分 类 号：TL942.21[核科学技术—辐射防护及环境保护]