工程科学学报，第40卷，第7期：808-814,2018年7月 Chinese Journal of Engineering,Vol.40,No.7:808-814.July 2018 DOI:10.13374/j.issn2095-9389.2018.07.006;http://journals.ustb.edu.cn 白云母伴生铷矿氯化焙烧-水浸法提铷的动力学研究 陈丽杰，黄林青，袁露成，田磊区 江西理工大学治金与化学工程学院，赣州341000 ☒通信作者，E-mail:tianleijx(@163.com 摘要采用了氯化钙氯化焙烧-水浸法提取白云母中铷的方法.通过氯化焙烧热重-差热分析曲线可知，用氯化钙混合白 云母进行氯化反应的温度要比用氯化钠低l00℃左右，且用CCL,氯化比NaCl更有效率.接着考察了氯化培烧温度对铷提取 率的影响，结果表明，只有当氯化焙烧温度提高至800℃后，才可能取得明显的物的氯化效果，铷的提取率即达96.71%，随氯 化培烧温度升高，铷的氯化速率不断增大，特别是800℃后，铷的氯化速率明显增大，这说明高温有利于铷的氯化焙烧.最终 对白云母与氯化钙氯化培烧过程进行了动力学研究.结果表明，三维界面反应方程能较好地描述该氯化焙烧反应体系，根据 阿仑尼乌斯公式计算出来的活化能为42.22kJ·mol',说明白云母和CaCl2的氯化过程的确受界面化学反应控制. 关键词白云母；铷；氯化培烧：氯化钙：动力学 分类号TF826.4 Kinetic studies of rubidium extraction from muscovite using chlorination roasting-water leaching process CHEN Li-jie,HUANG Lin-qing,YUAN Lu-cheng,TIAN Lei School of Metallurgical and Chemical Engineering,Jiangxi University of Science and Technology,Ganzhou 341000,China Corresponding author,E-mail:tianleijx@163.com ABSTRACT Rubidium is a very active and highly dispersed rare alkali metal,which has a wide range of applications in space tech- nology,electronics,bioengineering,and materials science.To date,no single mineral with the industrial exploitation of rubidium has been found.Rubidium is mainly associated with cesium lithium mica,pollucite,carnallite,potash,seawater,and salt lake brine.In recent years,a large amount of rubidium muscovite has been found in China,and they have become an important resource for extracting rubidium.If comprehensively explored,they will alleviate the shortage of rubidium resources in China.Therefore,it is imperative to develop a simple and highly efficient process for rubidium muscovite exploration.Here,a chlorination roasting process was proposed to recover rubidium from the distinctive rubidium-containing muscovite.According to the differential thermal analysis and thermogravimet- ric analysis (DTA-TG)curves of chlorinated roasting,the temperature of the chlorination reaction using calcium chloride is about 100 C lower than that of sodium chloride,and the chlorination is more efficient with CaCl than NaCl.Subsequently,the impact of chlorin- ation temperature on the rubidium extraction rate was investigated.The results show that the rubidium can be chlorinated only when the chlorination temperature reaches 800C,whereby the rubidium extraction rate is 96.71%.The rubidium chlorination rate largely in- creases with,especially after 800C;this shows that the high temperature is beneficial to the chlorination roasting of rubidium.Final- ly,the kinetics results of the chlorination roasting of the kaolin ore show that the extraction rate of rubidium is controlled by the chemi- cal reaction,and the activation energy in the roasting temperature range is 42.22 kJmol-. KEY WORDS muscovite;rubidium;chloridizing roasting;calcium chloride;kinetics 收稿日期：2018-01-08 基金项目：国家自然科学基金资助项目(51764016)：江西省高等学校科技落地计划资助项目(KD13046):江西理工大学博士科研启动基金资助 项目(jxxs17045):2017年校级学术学位研究生创新专项资金资助项目(ZS2017-S121):江西省教育厅科学技术研究资助项目(G刀170545)工程科学学报,第 40 卷,第 7 期:808鄄鄄814,2018 年 7 月 Chinese Journal of Engineering, Vol. 40, No. 7: 808鄄鄄814, July 2018 DOI: 10. 13374 / j. issn2095鄄鄄9389. 2018. 07. 006; http: / / journals. ustb. edu. cn 白云母伴生铷矿氯化焙烧鄄鄄水浸法提铷的动力学研究 陈丽杰, 黄林青, 袁露成, 田 磊苣 江西理工大学冶金与化学工程学院, 赣州 341000 苣通信作者,E鄄mail: tianleijx@ 163. com 摘 要 采用了氯化钙氯化焙烧鄄鄄水浸法提取白云母中铷的方法. 通过氯化焙烧热重鄄鄄差热分析曲线可知,用氯化钙混合白 云母进行氯化反应的温度要比用氯化钠低 100 益左右,且用 CaCl 2氯化比 NaCl 更有效率. 接着考察了氯化焙烧温度对铷提取 率的影响,结果表明,只有当氯化焙烧温度提高至 800 益后,才可能取得明显的铷的氯化效果,铷的提取率即达 96郾 71% ,随氯 化焙烧温度升高,铷的氯化速率不断增大,特别是 800 益后,铷的氯化速率明显增大,这说明高温有利于铷的氯化焙烧. 最终 对白云母与氯化钙氯化焙烧过程进行了动力学研究. 结果表明,三维界面反应方程能较好地描述该氯化焙烧反应体系,根据 阿仑尼乌斯公式计算出来的活化能为 42郾 22 kJ·mol - 1 ,说明白云母和 CaCl 2的氯化过程的确受界面化学反应控制. 关键词 白云母; 铷; 氯化焙烧; 氯化钙; 动力学 分类号 TF826郾 4 收稿日期: 2018鄄鄄01鄄鄄08 基金项目: 国家自然科学基金资助项目(51764016);江西省高等学校科技落地计划资助项目(KJLD13046);江西理工大学博士科研启动基金资助 项目(jxxjbs17045);2017 年校级学术学位研究生创新专项资金资助项目(ZS2017鄄鄄 S121);江西省教育厅科学技术研究资助项目(GJJ170545) Kinetic studies of rubidium extraction from muscovite using chlorination roasting鄄鄄water leaching process CHEN Li鄄jie, HUANG Lin鄄qing, YUAN Lu鄄cheng, TIAN Lei 苣 School of Metallurgical and Chemical Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, China 苣Corresponding author, E鄄mail: tianleijx@ 163. com ABSTRACT Rubidium is a very active and highly dispersed rare alkali metal, which has a wide range of applications in space tech鄄 nology, electronics, bioengineering, and materials science. To date, no single mineral with the industrial exploitation of rubidium has been found. Rubidium is mainly associated with cesium lithium mica, pollucite, carnallite, potash, seawater, and salt lake brine. In recent years, a large amount of rubidium muscovite has been found in China, and they have become an important resource for extracting rubidium. If comprehensively explored, they will alleviate the shortage of rubidium resources in China. Therefore, it is imperative to develop a simple and highly efficient process for rubidium muscovite exploration. Here, a chlorination roasting process was proposed to recover rubidium from the distinctive rubidium鄄containing muscovite. According to the differential thermal analysis and thermogravimet鄄 ric analysis (DTA鄄鄄TG) curves of chlorinated roasting, the temperature of the chlorination reaction using calcium chloride is about 100 益 lower than that of sodium chloride, and the chlorination is more efficient with CaCl 2 than NaCl. Subsequently, the impact of chlorin鄄 ation temperature on the rubidium extraction rate was investigated. The results show that the rubidium can be chlorinated only when the chlorination temperature reaches 800 益 , whereby the rubidium extraction rate is 96郾 71% . The rubidium chlorination rate largely in鄄 creases with, especially after 800 益 ; this shows that the high temperature is beneficial to the chlorination roasting of rubidium. Final鄄 ly, the kinetics results of the chlorination roasting of the kaolin ore show that the extraction rate of rubidium is controlled by the chemi鄄 cal reaction, and the activation energy in the roasting temperature range is 42郾 22 kJ·mol - 1 . KEY WORDS muscovite; rubidium; chloridizing roasting; calcium chloride; kinetics