红土镍矿焙烧熟料溶出过程中镍的行为  

Reaction Behaviour of Ni during Leaching from Roasting Materials of Laterite Nickel Ore and Ammonium Sulfate

作　　者：李洁 徐玉君 沈洪涛 辛海霞 翟玉春 Li Jie;Xu Yujun;Shen Hongtao;Xin Haixia;Zhai Yuchun(School of Metallurgy Northeastern University, Shenyang, Liaoning, China;School of Resources and M aterials, Northeastern University at Qinhuangdao, Qinhuangdao, Hebei, China;Key laboratory of Clean Conversion and Efficient Utilization to Resource in Qinhuangdao, Qinhuangdao, Hebei, China)

机构地区：[1]东北大学冶金学院,辽宁沈阳110819 [2]东北大学(秦皇岛分校)资源与材料学院,河北秦皇岛066004 [3]秦皇岛市资源清洁转化与高效利用重点实验室,河北秦皇岛066004

出　　处：《矿产综合利用》2019年第5期37-41,共5页Multipurpose Utilization of Mineral Resources

基　　金：河北省自然科学基金(E2017501073);博士基金(XNB201513);博士基金(XNB201514);中央高校基本科研业务专项资金(N152304010);中央高校基本科研业务专项资金(N172304045);国家重点基础研究发展计划资助项目(2014CB643405)

摘　　要：以红土镍矿-硫酸铵混合焙烧后所得熟料为研究对象,采用水溶出的方法提取镍,系统地研究溶出温度、液固比、溶出时间、搅拌强度对镍溶出率的影响,并对镍的溶出动力学进行探讨。结果表明:在最优溶出条件下:溶出温度60℃,溶出时间60min,液固比2.5:1,搅拌强度400r/min时,镍的溶出率达到99%以上;镍的溶出反应受外扩散控速,根据阿伦尼乌斯经验方程计算得到反应的表观活化能为E=8.08kJ·mol,得到溶出过程动力学方程为1-(1-α)^2/3=0.2749exp(-8075/RT)t。Taking the clinker obtained from laterite nickel ore and ammonium sulfate roasting as the research object, nickel was extracted by water dissolution The eff ects of temperature, mass ratio of liquid to solid, time and stirring speed on leaching rate of Ni are studied and the dissolution kinetics of nickel is studied too. The results show that when the temperature is 60℃, leaching time is 60 min, mass ratio of liquid to solid is 2.5:1, and stirring speed is 400 r/min, the leaching ratios of nickel reach the above 99%. The dissolution reaction of nickel is controlled by external diff usion. The apparent activation energy of the reaction which is calculated according to the Arrhenius empirical equation is E=8.08 kJ/mol, and the kinetic equation of dissolution process is 1-(1-α)^2/3 =0.2749exp(-8075/RT)t.

关 键 词：红土镍矿 焙烧 熟料 提取 动力学 

分 类 号：TF815[冶金工程—有色金属冶金]