China Coal Research Institute Corporation Ltd.
National Energy Technology & EquipmentLaboratory of Coal Utilization and Emission Control

虽中国煤炭资源丰富但优质炼焦煤资源有限,科学合理配煤不仅是保证焦炭质量和满足焦炉生产要求的基本措施,也是合理利用煤炭资源、节约优质炼焦煤的有效途径,因而选取黑龙江典型炼焦煤开展煤质特征与成焦特性研究,以期为炼焦配煤提供基础技术支撑。结合典型炼焦煤的煤质特征与成焦特性的指标评价并配合小焦炉实验,从镜质体反射率分布、焦炭显微组分对焦炭强度的影响以及流动度指标与其他特性指标的相关性等方面研究煤化程度、煤岩组成等性质对焦炭质量的影响。研究表明:所采集的炼焦煤均为混煤,其黏结性较好但流动性较差,且流动度与黏结指数、胶质层最大厚度和镜质体反射率等的相关性较差;对于混煤而言,不能单纯地分析吉氏流动度或煤岩指标对焦炭冷热强度的影响;通过对焦炭显微光学组织的分析,发现出炉焦炭的各向同性组织与细粒镶嵌状组织之和占比超过75%,导致焦炭强度偏低、质量较差;炼焦煤的黏结指数较高,表明煤样中塑性体黏结惰性物质的能力较好,但煤样的吉氏流动度较低,说明黑龙江省内炼焦煤塑性体的流动性不佳,在成焦过程中不利于塑性体与煤粒间或与惰性物质之间的相互融合,可能与煤样中混入较多的低变质煤有关,建议配入具有宽塑性区间、高流动度、较高惰质组含量的煤样对配合煤的结构进行优化以提高配合煤塑性体的黏结性。

Although China has abundant coal resources, highquality coking coal resources are limited. Scientific and reasonable coal blending is not only a basic measure to ensure coke quality and meet the production requirements of coke ovens, but also an effective way to reasonably utilize coal resources and save highquality coking clean coal. In order to provide basic technical support for coking coal blending, typical coking coal from Heilongjiang province was selected for research on coal quality characteristics and coking characteristics. Combining the evaluation of coal quality characteristics and coking characteristics based on typical coking coal, cooperated with small coke oven exper iments, from the distribution of vitrinite reflectance, the influence of coke microstructure on coke strength, and the correlation between flowability index and other characteristic indicators, etc, the influence of coal gasification de gree, coal rock composition and other properties on coke quality were studied. The results show that the collected coal samples are mixed coal with high cohesive but poor fluidity, and the correlation between maximum fluidity index (MF) and caking index (G), maximum thickness of the plastic layer (Y) and vitrinite reflectance (Rmax) is poor. For mixed coal, it is not possible to simply analyze the influence of Gieseler flowability or coal rock indicators on the mechanical and thermal strength of coke. Through the analysis of the microstructure of coke, the sum of isotropic and finegrained inlaid structure is greater than 75%, resulting in low strength and poor quality. The high bonding index of coking coal indicates that the plastic body in the coal sample has a good ability to bind inert substances, but the low Gibbs flowability of the coal sample indicates that the fluidity of the plastic body in coking coal in Heilongjiang province is poor, which is not conducive to the fusion between the plastic body and coal particles or inert substances during coking. This may be related to the inclusion of a large amount of low metamorphic coal in the coal sample. It is recommended to optimize the structure of the blended coal by adding coal samples with a wide plastic range, high fluidity, and high inertinity to improve the bonding properties of the plastic body of blended coal.

煤科院新产品新工艺开发基金资助项目(2022CG-MH-01)

吴洋.黑龙江省典型炼焦煤的煤质特征与成焦特性研究[J].煤质技术,2024,39(2):87-96.

WU Yang. Research on coal quality and coking characteristics of typical mixed coking coal in Heilongjiang Province[J]. Coal Quality Technology, 2024, 39 (2): 87-96.