Coal injection: blast furnace pulverized coal injection is from the blast furnace tuyere directly into the furnace pulverized anthracite or soot pulverized coal or the mixture of the two to replace coke to provide heat and reducing agent, thereby reducing the coke ratio and reducing the cost of pig iron. Generally, blast furnace injection coal includes: bituminous coal, anthracite, lean coal, lean coal, etc., low coking property, low ash content, relatively high fixed carbon, good grainability coal can be used as blast furnace injection coal.

Fine coal washing: the raw coal is washed, the gangue in the coal is removed, and the quality coal is adapted to special purposes, that is, clean coal. Refined coal can be divided into metallurgical metallurgical coal and other metallurgical metallurgical coal. Metallurgical coking coal, its particle size is less than 50, 80, 100 mm three, ash content is less than or equal to 12.5%. Referred to as smelting clean coal; Other coking coal, particle size is also divided into less than 50, 80, 100 mm three. The ash content is between 12.5% and 16%, referred to as other cleaned coal.