依兰煤田依兰煤矿达连河组煤质特征研究
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摘要
依据工业分析、硫含量和煤灰成分测试结果,对依兰煤矿达连河组煤的煤质特征进行了研究,结果表明研究区达连河组煤以特低水分含量、中灰分产率、高-特高挥发分产率和低硫含量为特征;煤灰成分主要以SiO_2和Al_2O_3为主。SiO_2/Al_2O_3比值指示Si和Al可能主要赋存于高岭石中,部分Si来自于石英;硫含量、灰成分指数Fe_2O_3+MgO+CaO、Al_2O_3+SiO_2-MgO+CaO-Fe_2O_3+SO_3指示煤形成于淡水环境,主要受控于陆源碎屑的控制,此外(Fe_2O_3+CaO+MgO)/(SiO_2+Al_2O_3)比值指示沼泽具弱还原环境;研究区煤中源岩主要为酸性岩组分。
Based on the results of proximate analysis, sulfur content and ash composition, investigates the coal quality of the Dalianhe formation in Yilan coal mine. The investigated coals are characterized by super-low moisture content, medium ash yield, high to super-high volatile matter yield and low-sulfur content. Coal ash composition consists mainly of SiO_2 and Al_2O_3. The SiO_2/Al_2O_3 ratio indicates that Si and Al are mainly hosted in kaolinite and additional Si is derived from quartz. Sulfur content,ash composition index Fe_2O_3+MgO+CaO as well as Al_2O_3+SiO_2-MgO+CaO-Fe_2O_3+SO_3 indicate that the investigated coals were formed in fresh water-influenced environment influenced by terrigenous matter input. Additionally,(Fe_2O_3+CaO+MgO)/(SiO_2+Al_2O_3) ratio suggest a relatively weak reducing condition for peat environment. The source rocks for the investigated coals are mainly felsic components.
Based on the results of proximate analysis, sulfur content and ash composition, investigates the coal quality of the Dalianhe formation in Yilan coal mine. The investigated coals are characterized by super-low moisture content, medium ash yield, high to super-high volatile matter yield and low-sulfur content. Coal ash composition consists mainly of SiO_2 and Al_2O_3. The SiO_2/Al_2O_3 ratio indicates that Si and Al are mainly hosted in kaolinite and additional Si is derived from quartz. Sulfur content,ash composition index Fe_2O_3+MgO+CaO as well as Al_2O_3+SiO_2-MgO+CaO-Fe_2O_3+SO_3 indicate that the investigated coals were formed in fresh water-influenced environment influenced by terrigenous matter input. Additionally,(Fe_2O_3+CaO+MgO)/(SiO_2+Al_2O_3) ratio suggest a relatively weak reducing condition for peat environment. The source rocks for the investigated coals are mainly felsic components.
引文
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