• 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.