RICE MILLING PROCESS

There are several steps involved in the Rice milling process to get the final product. Once the harvest season is over, paddy comes to the mills and it under goes to cleaning and removal of foreign material process. Next step, the rough rice passes through sheller which removes the hull but leaves the bran layer. The brown rice which remains, may then be milled which actually rubs the grains together under pressure to remove the bran layers. The finished milled product is then packaged for sale.

Dried Rough Rice
Cleaning Machines
Cleaned Rough Rice
Cleaned Rough Rice
Warm Water Soak Under Pressure Steamed And Dried
Parboiled Rough Rice
Shelling Machines
Co-Product: Hulls
Brown Rice Or Parboiled Brown Rice
Brown Rice Or Parboiled Brown Rice
Vertical Whitener
Co-Products: Rice Bran
Water Polisher
Milled Rice or Milled Parboiled Rice
Grading Machines
Co-Product: 2nd Heads, Screenings, Brewers
Brown Rice or Parboiled Brown Rice
Milled Rice or Milled Parboiled Rice
Pre-Cooking
Pre-Cooking
Instantizing
Enriching
Instantizing
Packaging Parboiled Brown Rice
Packaging Regular Brown Rice
Packaging Instant Brown Rice
Packaging Milled Rice
Packaging Enriched Rice
Packaging Instant Rice
Packaging Milled Parboiled Rice

Rice After Grading

Rice received from grader comes in two lengths:

1) Head/Full length Rice

2) Broken Rice

Broken rice can be further sub-divided in following categories:

1) Dubar (10%-12% of Broken rice)

2) Tibar (4%-5% of Broken rice)

3) Kinki (86%-83% of Broken rice)

Rice Husk Ash (RHA)

Rice Husk Ash (RHA) is obtained by combustion of rice husk. RHA is generally 25% of rice husk. Moreover husk contains 15%-18% silica in it; hence it can be a source for silicates for manufacturing glasses. RHA has high levels of silicon dioxide, approximately 93%.
Rice husk is burnt approximately for 48 hours under uncontrolled combustion process. The burning temperature is within the range 600 to 8500C. The ash obtained is grounded in a ball mill for 30 minutes and RHA is obtained, grey in color. RHA can either be used with cement to make mortar (green concrete) or it can be mixed with quicklime to make a hydraulic, cement free mortar.
Other uses of RHA are for refactory, ceramic glaze, insulator, roofing shingles, waterproffing chemicals, oil spill absorbent, speciality paints, flame retardants, carrier for pesticides, insecticides and bio fertilizers etc.