太平洋中部深海粘土中稀土的赋存状态及浸出研究  

Occurrence State and Leaching of Rare Earth in Pelagic Clay from Central Pacific

作　　者：刘志强[1,2,3] 吴宇坤[3] 朱克超[4] 李伟[1,2] 朱薇[1,2] 邱显扬[1,2] 

机构地区：[1]广州有色金属研究院稀有金属研究所,广东广州510650 [2]广东省稀土开发及应用重点实验室,广东广州510651 [3]昆明理工大学冶金与能源工程学院,云南昆明650093 [4]广州海洋地质调查局,广东广州510075

出　　处：《中国稀土学报》2015年第4期506-512,共7页Journal of the Chinese Society of Rare Earths

基　　金：国家"973"重大科学问题导向型项目(2012CBA01200);中国地质调查局大洋调查与研究项目(GZH201100303-05);广东省科技计划项目(2013B010403017)资助

摘　　要：对太平洋中部深海粘土中的稀土元素赋存状态进行了表征,同时还研究了H2SO4溶液浸出稀土工艺,考察了H2SO4浓度、浸出时间、液固比、浸出温度等因素对深海粘土中Y浸出率的影响。研究结果表明:深海粘土主要由粘土、沸石、磷灰石等组成,稀土元素主要赋存于磷灰石中;Y的最佳浸出工艺条件为:H2SO4浓度为1 mol·L-1,浸出温度为40℃,浸出时间为60 min,液固比为4∶1,Y的浸出率为84.38%。Occurrence state of rare earth in pelagic clay from the Central Pacific was characterized and process ofleaching rare earth by sulphuric acid was reported in this paper. Effects of process parameters on leaching ratio of rare earth element Y,including the sulphuric acid concentration,liquid-solid ratio,leaching temperature and time were investigated. The results showed that rare earth was main occurrence in apatite,and the pelagic clay was mainly composed of clay,zeolite and apatite. The best result of leaching ratio of rare earth element Y in this work was 84. 38%,and leaching of the pelagic clay with sulphuric acid solution（ 1 mol·L- 1） and liquid-solid ratio was4 /1 at 40 ℃ for 1 h.

关 键 词：太平洋中部 深海粘土 稀土 硫酸 浸出 

分 类 号：TF845[冶金工程—有色金属冶金]