汪清油页岩干馏过程中稀土元素迁移特性

发布时间：2018-05-05 07:13

本文选题：稀土元素 + 汪清油页岩　；参考：《中国稀土学报》2017年04期

【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。
[Abstract]:By means of stepwise chemical extraction experiment and inductively coupled plasma mass spectrometry (ICP-MS) method, the contents and geochemical characteristics of rare earth elements in oil shale samples and semi-coke samples were studied by taking Luozigou oil shale in Wangqing County, Jilin Province, as an example. The distribution pattern and its occurrence state are studied. The results show that compared with Chinese coal, the content of rare earth elements in Wangqing oil shale is obviously enriched, and the enrichment degree of light rare earth elements is higher than that of heavy rare earth elements, and the fractionation of heavy rare earth elements is obvious. 未 Ce_N is 1.46, showing obvious positive anomaly. The results show that the diagenetic environment is not affected by sea water, and the REE is closely related to the continental source rock. The rare earth elements in Wangqing oil shale are mainly found in inorganic minerals, the content of organic matter is very small, and the combination of silicon and aluminum compounds is the majority. Different extraction states have different effects on the fractionation effect of rare earth elements in oil shale. The content of rare earth elements in oil shale semi-coke changed little and the enrichment trend of rare earth elements was obvious. The migration of rare earth elements during distillation is mainly due to the stable state, the decrease of sulphide binding state and the increase of carbonate bound state, in which the iron-manganese oxide binding state is not obvious.
【作者单位】：东北电力大学油页岩综合利用教育部工程研究中心;
【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
【分类号】：TE662.5

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