Fly Ash Manufacturing is a subcategory of the Electrical Machinery, Equipment, and Supplies industry that involves the production of fly ash, a byproduct of coal combustion. Fly ash is a fine powder that is collected from the flue gases of coal-fired power plants. It is commonly used as a supplementary cementitious material in concrete production, as well as in the manufacturing of bricks, blocks, and other building materials. The process of Fly Ash Manufacturing involves the collection of fly ash from power plants, transportation to manufacturing facilities, and processing to meet specific quality standards. The fly ash is typically stored in silos before being transported to customers.