Compacted rice mill

Small-scale 2-stages rubber rollers rice mill is a promising solution to replace the old small rice husking machines (Engelberg huller). Old husking mills cause high breakage with low milled rice and head rice recovery and have limitations to mill aromatic fine grain rice varieties. Moreover, husking mills do not separate rice bran from the husk, which prevents millers from optimizing the benefits from rice by-products.

Despite the huge increase of automatic and semi-automatic rice mill in the last decades, husking mills are not yet out of the scene and still contribute a large proportion of total milled rice production in developing countries. Most small-scale rice millers cannot shift to automatic or semi-automatic rice mill due to financial constraints and the lack of technical skills. So, using the small-scale 2-stages rubber rollers that have different capacities and are equipped with components that can clean, separate the husk from rice bran, and polish the rice with low operating power can enable small-scale rice millers to move from the traditional Engelberg huller to the modern technology.

Producing high-quality rice with reducing milling losses will improve food and nutritional security. It will also help small-scale rice millers create more access to local and international markets and reduce processing cost.

Major components of compacted rice mill are a 6-inch wide rubber rollers husker and friction emery polisher. The new 2-stages rubber rollers rice mills have a simple design and it is easy to operate. The operating power source is a 30 hp electric motor compared to 100 hp motor which is needed to run old rice husking machines. The 2-stages rubber rollers rice mill has a capacity up to 700 kg/h and dehusking is done with rubber rollers. Husk is separated by aspiration and the bran is removed by friction/abrasive polishers. The machine is equipped with air duct which sucks out the husk of the rubber rolls and discharges the bran from the machine in the second stage.

Benefits of using the new 2-stages rubber rollers rice mill:

  • At least 5 % increase in milling recovery can be achieved.
  • Reduces the percentage of broken rice by 24% and 11.5 % in unparboiled and parboiled aromatic long grain rice varieties, respectively.
  • Reduces the percentage of broken rice by 62 % on the average for unparboiled and parboiled local varieties.
  • Adds value to small-scale rice millers, where producing bran as a separate component can increase their income.
  • Lower operational cost to mill rice compared with the old husking rice mills.
  • It can be operated by engine