型煤冷态强度影响因素的光学显微分析

摘要

The primary issue concerning briquette manufacture was the strength of the briquettes, which was dominated by its microstructure. The relationship between microstructure of briquettes made by different amount of bentonites with different pressure and its strength was studied using optical microscopic analysis method and digital image processing technology. The strength of briquettes was controlled by its fracture, followed by its porosity. The emerging of fracture in briquettes was related to the binders used, the pressure loaded and the properties of feed coals, while porosity related to water added.%利用光学显微分析及数字图像处理技术获取型煤显微结构特征,研究不同膨润土黏结剂的添加量及成型压力下型煤显微结构与型煤强度间的关系.结果表明,型煤的冷态强度主要受型煤中的裂隙控制,而型煤中的空隙是次要影响因素.型煤中的裂隙产生与使用的黏结剂、成型压力及原料煤性质相关,而型煤中的空隙与外加水分相关.