地质因素对炼焦煤煤质及成焦特性的影响研究

doi:10.11799/ce202211033

摘要/Abstract

摘要： 以不同成煤环境下形成的炼焦煤为研究对象，进行工业分析、粘结性分析、煤岩特性分析以及炼焦煤所炼焦炭质量分析，研究了其煤岩特征、变质程度、成焦特性和地质因素的关系。结果表明，煤层发育过程中的氧化还原程度、水底动能强度、陆源碎屑输入、海水的周期性进退等是造成煤岩煤质特征差异的主要原因|复杂的地质因素造成煤的变质程度和煤质特征的差异性，进而影响成焦特性|成煤微环境的差异使得泥炭在发育过程中成煤母质、陆源碎屑输入等条件不同在垂向上形成不同煤岩类型的煤|水侵时形成的煤中镜质组含量明显高于水退时形成的煤层镜质组含量|当划分煤相时，低位沼泽环境中形成的煤镜质组含量普遍偏高，而高位突起沼泽环境中形成的煤以惰质组为主。煤的变质程度也是影响炼焦煤特性的重要因素，低阶煤的挥发分产率往往受到煤岩组分的影响，壳质组的挥发分产率最高，惰质组具有最低的挥发分产率，镜质组介于两者之间。

关键词: 炼焦煤, 显微组分, 地质控制, 成焦特性

Abstract: This paper takes Shanxi coking coal as the research object, based on the main coal field exploration results, relevant geological data and actual coal chemical achievements in China, and using the theories and methods of coal geology, coal petrology, coal chemistry and coal chemical engineering, expounds the coal rock and coal quality characteristics of coking coal in China at the present stage, and discusses the influence of geological factors on the coking characteristics of coking coal from the aspects of coal rock composition, coal quality change characteristics and sedimentary environment characteristics of the study area. The composition of macerals, the types and proportion of sub components and the differences of coal quality characteristics in coking coal are closely related to the coal forming environment, which is mainly affected by the changes of the nature of coal forming basin, provenance components and sedimentary environment. The nature of coal forming basin base and provenance and the change of sedimentary environment directly affect the coal quality characteristics of coking coal, and the sedimentary environment also affects the type, sub component content and composition of macerals. Finally, the same kind of coal shows different coke properties. In the process of coal formation, the content of vitrinite in coal formed during water invasion is significantly higher than that in coal formed during water regression. When the coal facies are divided, the content of coal vitrinite formed in the low-level swamp environment is always the highest, and the wetland herb swamp wet forest swamp facies is the most typical; The coal formed in the high-level protrusion swamp environment is mainly inertinite, and the dry forest swamp facies is the most typical. The metamorphic degree of coal is often an important factor affecting the characteristics of coking coal. The volatile yield of coal in low rank coal is often affected by coal rock components. The volatile yield of EXINITE is the highest, inertinite is the lowest, and vitrinite is between the two.

中图分类号:

P618.11

王岩, 杨承伟, 曲思建. 地质因素对炼焦煤煤质及成焦特性的影响研究[J]. 煤炭工程, 2022, 54(11): 187-192.

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