Coal preparation is the process of improving the quality of coal by removing impurities and increasing its energy content. This involves several steps, including crushing, screening, and washing the coal to separate valuable materials from unwanted substances like ash and sulfur. The goal of coal preparation is to produce a cleaner and more efficient product for use in power generation and other applications. By enhancing the coal's properties, it can burn more efficiently, reducing emissions and improving overall performance in coal-fired power plants.