不同浸矿剂对离子型稀土矿物的润湿作用研究  

Study on the Wetting Effect of Different Leaching Agents on Ionic Rare Earth Minerals

作　　者：冯秀娟 刘帅军 王小青 张书荣 董成亮[1] FENG Xiujuan;LIU Shuaijun;WANG Xiaoqing;ZHANG Shurong;DONG Chengiang(School of Mines,China University of Mining and Technology,Xuzhou,Jiangsu 221116,China)

机构地区：[1]中国矿业大学矿业工程学院,江苏徐州市221116

出　　处：《矿业研究与开发》2023年第12期70-78,共9页Mining Research and Development

基　　金：国家重点研发计划项目(2018YFC1801800)。

摘　　要：以某离子型稀土矿为研究对象,分别考察了浸矿过程中硫酸铵、硫酸镁、氯化钙和去离子水在不同浓度、pH条件下对矿物颗粒润湿性的影响及矿物颗粒的微观形貌变化。在分析浸矿剂润湿离子型稀土矿机制的基础上,建立了润湿动力学方程。研究结果表明:在0~1 min内矿物产生积液并逐渐润湿,1~10 min内矿物发生膨胀分散,并产生孔隙裂隙,10 min后矿物结构基本不发生变化。浸矿剂浓度为0.3 mol/L时,润湿性最佳,渗透效果最好,各浸矿剂按润湿性能从高到低排序依次是:去离子水、硫酸铵、硫酸镁、氯化钙;酸性条件下,矿物颗粒的润湿性更好。通过分析润湿动力学方程可知,去离子水的润湿性能最好,K值为1.251 82,其次是硫酸铵、硫酸镁,氯化钙最差,K值仅为0.355 68。Taking an ionic rare earth ore as the research object,the effects of ammonium sulfate,magnesium sulfate,calcium chloride and deionized water on the wettability of mineral particles and the morphological changes of mineral particles under different concentrations and pH conditions during the leaching process were investigated.Based on the analysis of the mechanism of wetting ionic rare earth ore by leaching agent,the wetting kinetic equation was established.The results show that the minerals produce effusion and gradually wet in O-1 min,the minerals expand and disperse in 1-10 min,and produce pore cracks.After 10 min,the mineral structure basically does not change.When the concentration of leaching agent is O.3 mol/L,the wettability is the best and the penetration effect is the best.The order of wettability of each leaching agent from high to low is deionized water,ammonium sulfate,magnesium sulfate and calcium chloride.Under acidic conditions,the wettability of mineral particles is better.The analysis of the wetting kinetic equation shows that deionized water has the best wettability with a K value of 1.25182,followed by ammonium sulfate and magnesium sulfate,and calcium chloride is the worst with only a K valueof0.35568.

关 键 词：离子型稀土矿 浸矿剂 润湿性 微观形貌 动力学方程 

分 类 号：TD865[矿业工程—金属矿开采]