Core Viewpoint - The article emphasizes the transition of China's coal supply from "increasing quantity" to "improving quality," highlighting the importance of coal washing and selection for enhancing coal quality and meeting specific coal demands [1][4]. Group 1: Current State of Coal Industry - China's raw coal washing rate has reached 68%, indicating significant progress in coal quality management [4]. - The coal mining and washing industry has seen a 41.8% reduction in losses, reflecting improved profitability [1]. - The focus is shifting towards high-quality coal development, with an emphasis on utilizing intelligent technologies to enhance efficiency and reduce costs in coal washing plants [1][4]. Group 2: Importance of Coal Washing and Selection - Coal washing serves to remove impurities and ensure the quality of coal supply, which is crucial for effective resource utilization and environmental protection [3][4]. - The washing process includes key steps such as crushing, screening, separation, dehydration, and product storage, which are essential for producing high-quality coal products [4]. Group 3: Technological Advancements in Coal Washing - Different washing methods, including dry and wet processes, are being adopted based on regional water availability and coal characteristics [8]. - Intelligent technologies such as big data, cloud computing, and AI are being integrated into coal washing operations to enhance efficiency and reduce costs [9]. Group 4: Solid Waste Utilization - The utilization of solid waste, such as tailings and gangue, is increasing, transforming what was once a cost burden into new growth points for coal mines [11]. - Tailings are being processed and mixed with washed coal for sale, significantly improving resource utilization and generating additional revenue [13]. - Gangue is being used for underground filling, which reduces transportation costs and energy consumption, contributing to cost savings for coal mines [14].