... line include: 1.Bentonite storage,2.Coal storage,3.Pulverized coal preparation system,3.Concentrate storage,4.Drying chamber,5 ... .High-pressure roller mill system(obligate),6.Proportioning ... .Screening and distribution system,10.Traveling grate-rotary kiln-Annular Cooler system,11.Main induced air system,12.Finished product ...