The filtration and dewatering of fine clean coal not only ensure industrial water recycle in coal washing plant, but also reduce the moisture of coal product in order to meet the requirements of combustion or coking industry. Fine clean coal is mainly composed by organic matter, and the property difference of different organic matter determines the filtration and dewatering behavior. In this investigation, vitrinite and inertinite were separated from a clean bituminous coal, and the comparative filtration and dewatering behavior of vitrinite and inertinite were conducted. The results showed that inertinite has lower dewatering rate and higher filter cake moisture than vitrinite. The analysis of filter cake structure showed that inertinite particle is easier to be broken into small particles due to the difference of mechanical properties, thus forming more compact filter cake than vitrinite. The analysis of particle surface properties showed that vitrinite is more hydrophobic than inertinite, which makes water easier drained from filter cake. The simulation study showed that the structure of inertinite is more porous than that of vitrinite, and the interaction between inertinite and water is stronger than that between vitrinite and water. This study provides a theoretical basis for improving coal dewatering by selectively improving coal maceral hydrophobicity.

精细洁净煤的过滤和脱水，不仅保证了洗煤厂的工业用水循环利用，还降低了煤炭产品的水分，以满足燃烧或炼焦行业的需求。精细洁净煤主要由有机物组成，不同有机物的性质差异决定了过滤和脱水行为。在这项研究中，从干净的烟煤中分离了镜质体和惰质体，并进行了对比过滤和脱水行为。结果表明，惰质岩的脱水率和滤饼含水率均高于镜质体。滤饼结构分析表明，由于机械性能的差异，惰质颗粒更容易破碎成小颗粒，因此形成的滤饼比镜质石更致密。颗粒表面性质的分析表明，镜质石比惰质石更疏水，这使水更容易从滤饼中排出。仿真研究表明，惰质岩的结构比虚质岩的孔隙更为多孔，惰质岩与水之间的相互作用强于镜质岩与水之间的相互作用。该研究为通过选择性地改善煤的宏观疏水性来改善煤的脱水提供了理论基础。惰质体与水之间的相互作用比镜质体与水之间的相互作用强。该研究为通过选择性地改善煤的宏观疏水性来改善煤的脱水提供了理论基础。惰质体与水之间的相互作用比镜质体与水之间的相互作用强。该研究为通过选择性地改善煤的宏观疏水性来改善煤的脱水提供了理论基础。