汪清油页岩干馏过程中稀土元素迁移特性  

Migration Characteristics of Rare Earth Elements in Wangqing Oil Shale Retorting Process

作　　者：柏静儒[1] 潘思慧[1] 徐文龙[1] 张伟[1] 张宏喜[1] 王擎[1] 

机构地区：[1]东北电力大学油页岩综合利用教育部工程研究中心,吉林吉林132012

出　　处：《中国稀土学报》2017年第4期546-553,共8页Journal of the Chinese Society of Rare Earths

基　　金：吉林省重点科技公关项目(20140204004SF);吉林省自然科学基金项目(201215163)资助

摘　　要：利用逐级化学提取实验和电感耦合等离子质谱(ICP-MS)相结合的方法,以吉林汪清罗子沟油页岩为研究对象,对油页岩原样及半焦中的稀土元素含量、地球化学特性、分布模式及其赋存状态进行研究。结果表明,与中国煤相比,汪清油页岩中稀土元素含量明显富集,且轻稀土元素富集程度高于重稀土元素,轻重稀土元素分馏明显。δCe_N为1.46,表现为明显正异常,表明其成岩环境不受海水影响,稀土元素与陆源岩关系密切且来源一致。汪清油页岩中稀土元素主要赋存在无机矿物质中,有机质中含量极少,硅铝化合物结合态占大部分,不同提取态对油页岩中稀土元素的分馏效应影响不同。经过干馏过程,油页岩半焦中稀土元素含量变化不大,稀土元素有明显富集趋势。稀土元素在干馏过程中的迁移主要是由于稳定态、硫化物结合态减少,碳酸盐结合态增多,其中铁锰氧化物结合态变化不明显。Distribution characteristics geochemistry characteristics and occurrence modes of rare earth elements（REE） in oil-shale from Wangqing,Jilin province were determined by sequential chemical extraction process. The contents of REE were determined by inductively coupled plasma-mass spectrometry（ ICP-MS）. The results showed that the content of rare earth elements was in obvious enrichment in Wangqing oil-shale compared with the Chinese coal and the light REE enrichment degree was higher than the heavy rare earth elements,REE fractionation was obvious. δCe_N was 1. 46,which was obviously positive anomaly,and indicated that the rock forming environment was not affected by the sea water,and the rare earth elements were closely related to errigenous clastic rock relationship. The REE of Wangqing oil-shale were primarily associated with mineral matters,REE content in organic matter content was extremely low,silicon aluminum compounds combined with account for most of the state,the effect of different extraction state on the fractionation of the rare earth elements in oil shale was different. After the oil shale retorting process,the change of the content of rare earth elements in the semi coke was little and the rare earth elements had obvious enrichment trend. Migration of the rare earth elements in the process of carbonization was mainly due to the stable state and the bound state sulfide reduction,and the carbonate increased,of which the iron and manganese oxides state did not change significantly.

关 键 词：稀土元素 汪清油页岩 地球化学 赋存状态 迁移特性 

分 类 号：TQ533[化学工程—煤化学工程]