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.