Coal processing is the method of transforming raw coal into a more useful and cleaner form. This involves several steps, including crushing, screening, and washing to remove impurities like dirt and rocks. The goal is to enhance the quality of coal, making it suitable for various applications, such as electricity generation and steel production. After processing, the coal can be categorized into different grades based on its carbon content and energy output. Higher-grade coals, such as anthracite, are more efficient and cleaner-burning, while lower-grade coals, like lignite, are often used for local power generation.