Mining
Washing
Drying
Sieving
Inspection
Packing
To get the development permission Cutting of trees Remove the topsoil Mining the raw material
Transport of the raw material Washing by water Drain the water
650∼850℃ Heated-air drying to keep the water amount in the raw material less than 1 %.
Sieve to each size by vibrating sieving machine.
Periodic inspection of water amount, grain sizes, apparent specific gravity and pH value for each lot
Pack the product automatically.