First of all, on the basis that the raw material meets the requirements of the rod-making water content <12%, about 3 tons of raw materials produce 1 ton of qualified charcoal. Converted into a square, about 15-18 cubic meters of sawdust can produce 1 ton of charcoal. The raw materials must be dried, not naturally dried raw materials, let alone wet raw materials. Because the moisture content of natural dry raw materials is generally 15~30%, and wet raw materials are generally 40%~70%.