青海石灰沟克鲁克组煤中伴生元素的研究

发布时间：2018-02-04 13:24

  本文关键词： 石灰沟 克鲁克组 煤 伴生元素 赋存特征　出处：《河北工程大学》2015年硕士论文　论文类型：学位论文

【摘要】：中国煤炭资源丰富,也是世界煤炭生产量和消费量最大的国家,在相当长的时期内,煤炭在我国能源消费构成中的主导地位不会发生根本变化。随着经济的发展和科技的进步,对煤炭的需求日益增加,同时产生的环境问题也日益严峻。为了能够充分利用煤炭资源的同时保护环境,近年来内外许多学者对煤中伴生元素的成矿研究和利用方面进行了深入研究。研究煤中伴生元素的含量和分布特征,不仅可以为研究煤层的形成提供地球化学依据,而且为煤炭资源的综合开发利用等提供重要的理论依据。本文以地球化学、煤地质学、煤岩学、矿物学和沉积学等理论为基础,运用光学显微镜、LTA+XRD(低温灰化+X射线衍射)、XRF(X射线荧光光谱分析)、ICP-MS(电感耦合等离子体质谱仪)、SEM+EDS(扫描电子显微镜观测+能谱仪分析)等仪器,对石灰沟克鲁克组煤进行测试分析。研究了石灰沟克鲁克组煤的煤质特征、矿物特征、煤岩特征、微量元素含量及分布特征特征,并据此对伴生元素在煤中的赋存状态、分散富集程度及煤层的成煤环境等问题进行了探讨。研究结果表明:(1)石灰沟石炭系克鲁克组煤为低灰分、高挥发分、特低硫煤。样品镜质体反射率介于1.06%-1.62%之间,均值为1.21%,属于焦煤。煤中矿物主要为粘土矿物、黄铁矿、方解石、石英、石膏等。(2)通过对煤中伴生元素的研究发现,研究区克鲁克组煤层是海陆交互相沉积,但主要以海相沉积为主;沉积水介质温度在27℃左右;物源具有多样性的特点,但以花岗岩等酸性岩为主。(3)通过研究石灰沟克鲁克组煤中伴生元素间相互关系、微量元素和显微煤岩组分、无机组分相关性的研究,发现研究区煤中大部分微量元素的赋存与无机组分和有机组分均有关。
[Abstract]:China is rich in coal resources, but also the largest coal production and consumption in the world, in a very long period of time. The dominant position of coal in the composition of energy consumption in China will not change fundamentally. With the development of economy and the progress of science and technology, the demand for coal is increasing day by day. At the same time, the environmental problems are becoming more and more serious. In order to make full use of coal resources at the same time to protect the environment. In recent years, many domestic and foreign scholars have carried out in-depth research on the metallogenic and utilization of associated elements in coal, and studied the content and distribution characteristics of associated elements in coal. It can not only provide geochemical basis for the formation of coal seam, but also provide important theoretical basis for the comprehensive development and utilization of coal resources. In this paper, geochemistry, coal geology, coal petrology. Based on the theories of mineralogy and sedimentology, LTA XRD (low temperature ashing X-ray diffraction) was used to analyze X-ray fluorescence spectra. ICP-MS (inductively coupled plasma mass spectrometer) SEM EDS (scanning electron microscope observation energy spectrometer analysis) and other instruments. The coal quality characteristics, mineral characteristics, coal rock characteristics, trace element content and distribution characteristics of calcareous Kruke formation coal were studied. The occurrence of associated elements in coal, the degree of dispersion and enrichment and the coal forming environment of coal seam are discussed. The results show that the coal of the Carboniferous Kruke formation in Liaogou is of low ash content. The vitrinite reflectance is between 1.06-1.62%, the mean value is 1.21 and belongs to the coking coal. The minerals in the coal are mainly clay minerals, pyrite and calcite. Quartz, gypsum, etc.) through the study of associated elements in coal, it is found that the coal seams of the Kruke formation in the study area are seams interbedded by sea and land, but mainly by marine deposits. The temperature of sedimentary water medium is about 27 鈩，

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