镧系元素地球化学效应的一个重要应用——以稀土元素的岩石分类和煤燃烧中的迁移富集过程为例  

The effect on geochemistry of the Rare Earth Element:an example of important application in the REE classification for petrology and study for migrating of the REE during the burning of lignite

作　　者：杨建业[1] 

机构地区：[1]西安科技大学材料科学与工程系,陕西西安710054

出　　处：《湖南科技大学学报（自然科学版）》2011年第2期113-118,共6页Journal of Hunan University of Science And Technology：Natural Science Edition

基　　金：国家自然科学基金项目(40872101);陕西省科技厅自然基金资助项目(109-Dk07Jk322);陕西省教育厅自然科学基金(DK07JK322)

摘　　要：从镧系元素地球化学效应的角度,探讨了鄂尔多斯盆地东胜ZKA183-87钻孔中砂岩、煤的稀土分布类型和云南小龙潭矿区褐煤不同燃烧方式下的稀土元素迁移和富集规律.研究结果表明,砂岩、煤的稀土分布类型与前人研究结论基本一致.发现褐煤燃烧时稀土元素的迁移和富集具有以下特征:无论哪种燃烧方式,褐煤中HREE均以同一种模式向飞灰和底灰中迁移;而LREE向飞灰、底灰迁移富集过程中则要受到燃烧方式的影响,不同的燃烧方式对其迁移模式影响较大;电厂粉煤燃烧时,愈是大离子LREE,愈趋于向飞灰相对富集,愈是大离子的HREE,则愈趋于向底灰相对富集;而褐煤的两种分级燃烧和不分级燃烧其飞灰/底灰的稀土分布模式则受燃烧方式和温度影响较大.镧系元素地球化学效应作为一种新方法,在研究各类地质体稀土元素特征是可行的,可以和传统的研究方法互相补充.Form the point of effect on geochiemistry of the REE,the REE distribution of sandstone,coal form ZKA183-87 drilling of Dongsheng in Orduos Basin and REE migration law in different ways of burning of lignite which form Xiaolongtan mine in Yunnan,Province were studied by using the date were published.The result shows that,in the REE distribution types of sandstone and coal consistent with previous findings on,at the same time,a new idea about the REE migration duing burning of lignite is put forwarded： whatever the form of combustion,it is same migrating way for HREE from lignite to fly and bottom ashes;howere,LREE,which migrating from lignite to fly and bottom ashes,is compliant about affected by different combustion： Pulverized coal combustion in power plant,the the larger ionic radius of LREE,the more enriched the fly ash while the larger ionic radius of HREE,the more enriched the bottom ash,and it is easily affected by the combustion of lignite and its burning temperature for REE distribution to fly and bottom ashes in two staged combustion or two non-staged combustion.this study shows that effect on geochemistry of REE,as a new study method,is effective in study REE mode of distribution of various types of geological and it complement the traditional methods for geochemistry of REE.

关 键 词：镧系元素地球化学效应 稀土的岩石分布类型 飞灰 底灰 

分 类 号：TQ533[化学工程—煤化学工程]