淮南二叠纪煤及其燃烧产物地球化学特征

黄文辉; 杨起; 彭苏萍; 唐修义; 赵志根

淮南二叠纪煤及其燃烧产物地球化学特征

1.
中国地质大学能源地质系, 北京 100083
2.
中国矿业大学资源开发工程系, 北京 100083
3.
淮南工业学院资源与环境工程系, 安徽淮南 232001

基金项目:

国家“973”资助项目“煤中硫及有害重金属赋存特征及其侵入环境的动态规律” 973-G1999022212-01-01

国家自然科学基金项目 49872054

国家自然科学基金重点项目 49632090

详细信息

作者简介:
黄文辉(1961-), 男, 副教授, 理学博士, 现在中国地质大学能源地质系工作

中图分类号: P95
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出版历程
- 收稿日期: 2000-07-20
- 刊出日期: 2001-09-25

GEOCHEMISTRY OF PERMIAN COAL AND ITS COMBUSTION RESIDUES FROM HUAINAN COALFIELD

1.
Department of Resources & Geology, China University of Geosciences, Beijing 100083, China
2.
Department of Resource and Development, China University of Mining and Technology, Beijing 100083, China
3.
Department of Resources and Environment Engineering, Huainan Institute of Technology, Huainan 232001, China

摘要

摘要: 采用仪器中子活化分析法INAA(instrumental neutron activation analysis)测试了淮南煤田二叠纪主采煤层原煤煤样的地球化学组成, 用X-射线荧光光谱XRFS(X-ray fluorescence spectrometry)测试了田家庵和洛河电厂的粉煤灰地球化学组成并与煤样作了对比分析, 用电子探针测试了飞灰中主要类型颗粒的化学组成.淮南煤中多数微量元素属正常水平.与克拉克值相比, 元素Se, S, As, Sb, Br, U和Cl等在煤中趋于富集, 其他元素均趋于分散.有机亲和性弱的亲石元素趋于在粉煤灰中聚集, 与铁关系密切的金属元素在粉煤灰中有明显的富集; 有机亲合性强的元素在燃烧过程中趋于以气态形式向空气中逸散.粉煤灰中因矿物与粒度的分异明显, 致使其化学组成在不同的粒度级和比重级中的分布也有较大的不同.飞灰中一些不定形颗粒主要由铁的氧化物和少量其他金属氧化物组成.硅酸盐类颗粒主要由硅、铝和铁的氧化物所组成, 而玻璃珠主要由硅和铝的氧化物组成.残碳中测得的砷、硫和氯的含量最高, 说明其对这些元素具有较强的吸附能力.研究粉煤灰的成分特点有助于粉煤灰的综合利用和评价其对环境的影响.
- 淮南二叠纪煤 /
- 煤中微量元素 /
- 燃烧产物 /
- 地球化学特征
Abstract: An INAA (instrumental neutron activation analysis) technique was applied to determine the abundance of rare-earth elements in 11 Permian coals from Huainan coalfield. The geochemistry of the combustion residues is analyzed by XRFS (X-ray fluorescence spectrometry), and the chemical compositions of some fly and bottom ashes are studied with the help of electronic probe. Compared with the coal in the world, most of the trace elements in Huainan coal are normally concentrated. Like the other coal in the world, the elements Se, S, As, Sb, Br, U and Cl are enriched in coal compared with Clark's value, while the other elements tend to be scattered in coal but fluctuate greatly and demonstrate great difference in different coal beds. On the other hand, the elements have a very similar abundant level in different bottom and fly ash samples. It is found that the elements with low organic affinity tend to concentrate in fly and bottom ash, and in particular, the elements with similar character of iron have 2 to 10 times concentration than in coal, meanwhile, the elements with strong organic affinity tend to dispose into the air. Moreover, the abundance of element in ash changes with different density and different density leads to different particle sizes. The bottom and fly ash consist of glass, lime, mullite, coal residues and ferrite minerals. Some carbon residues with sieve structure contain more elements of S, P, Cl and As, which indicates that the ash containing more carbon residues has a strong adsorptive power for some hazard elements in water. Hence, the study of the ash composition will make it possible to use ash by water cleaning and thus help the environment protection.
- Permian coal in Huainan /
- trace elements in coal /
- combustion residues /
- geochemistry character

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图 1 聚类分析元素谱系

Fig. 1. Cluster diagram of elements

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表 1 各煤层的灰成分分布情况

Table 1. Average chemical compositions of coal ash in coals in Huainan coalfield

表 2 淮南煤中微量元素质量分数分布分析结果

Table 2. Mass fractions of trace elements in Huainan coals

表 3 田家庵电厂(样品号T)、洛河电厂(样品号L) 粉煤灰主成分分布

Table 3. Main element oxides of bottom and fly ash from power plants of Tianjiaan and Luohe

表 4 田家庵、洛河电厂粉煤灰微量元素分布

Table 4. Trace element mass fractions of bottom and fly ash from the power plants of Tianjiaan and Luohe

表 5 不同飞灰颗粒电子探针分析结果

Table 5. Analysis results of electronic microprobe for some fly ash particles

参考文献(15)

[1]	Finkelman R B. Trace and minor elements in coal[A]. In: Engel M H, Macko S A, eds. Organic geochemistry [C]. New York: Plenum N Y, 1993. 593-607.
[2]	Finkelman R B. The origin, occurrence, and the distribution of the inorganic constituentsin low-rank coals[A]. In: Schobert H H, ed. Proceedings of the basic coal science workshop[C]. North Dakota: Grand Forks, 1982. 70-90.
[3]	Finkelman R B. Modes of occurrence of potentially hazardous elements in coal: levels of confidence[J]. Fuel Processing Technology, 1994, 39(1): 21-34.
[4]	Goodarzi F. Geology of trace elements in coal[A]. In: Swaine D J, Goodarzi F, eds. Environmental aspects of trace elementsin coal[C]. Dordrecht: KluwerAcademic Publishers, 1995. 51-75.
[5]	Mukhopadhyay P K, Lajeunese G, Crandlemire A L. Mineralogical speciation of elements in an eastern Canadian feed coal and their combustion residue from a Canadian power plant[J]. International Journal of Coal Geology, 1996, 30(1): 279-312.
[6]	Valkovic V. Trace elements in coal. Vol Ⅰ, Ⅱ, Ⅲ[M]. Boca Raton(Florida): CRC Press, 1983. 1-558.
[7]	杨起, 韩德馨. 煤田地质学(上册)[M]. 北京: 煤炭工业出版社, 1979. 1-309.
[8]	赵师庆. 实用煤岩学[M]. 北京: 地质出版社, 1991. 1-205.
[9]	黄文辉, 杨起, 汤达祯, 等. 陶枣煤田太原组高硫煤中硫及有害元素分布特征[J]. 地学前缘, 1999, 6(增刊): 45-51.
[10]	王中刚, 于学元, 赵振华. 稀土元素地球化学[M]. 北京: 科学出版社, 1989. 76-93, 310-313.
[11]	孙景信, Jervis R E. 煤中微量元素及其在燃烧过程中的分布特征[J]. 中国科学(A辑), 1986, 16(12): 1285-1294. https://www.cnki.com.cn/Article/CJFDTOTAL-JAXK198612005.htm
[12]	黄文辉, 杨起. 燃煤过程中有害元素转化机理研究进展[J]. 地质科技情报, 1999, 18(1): 71-74. doi: 10.3969/j.issn.1000-7849.1999.01.014
[13]	Seredin V V. Rare earth element bearing coals from the Russian far east deposits[J]. Int J Coal Geology, 1996, 30(1-2): 101-129. doi: 10.1016/0166-5162(95)00039-9
[14]	Huang W H, Yang Q, Tang D Z, et al. Rare earth geochemistry of Late Palaeozoic coals in North China[J]. Acta Geological Sinica, 2000, 74(1): 74-83.
[15]	许琪. 中国煤中伴生元素的聚集与扩散[J]. 煤炭学报, 1991, 16(1): 64-72. https://www.cnki.com.cn/Article/CJFDTOTAL-MTXB199101008.htm