Talking about the Milling Rice Mill
The rice milling machine mainly relies on the grinding and cutting of the rice grains by the dense sharp sand on the emery roller or sand mortar to remove the bran layer. The linear speed of the roller is relatively high, generally about 10-16 meters per second. The pressure in the whitening chamber is lower, and the surface of the rice grains is rougher, but there is less broken rice.
There are two commonly used sand mortar rice mills and horizontal emery roller rice mills. The roller of the vertical sand mortar rice mill is a truncated cone-shaped sand mortar with a large upper and a small bottom. The surface has no ribs or grooves and can be rotated forward or reverse. The gap between the sand mortar and its outer cone-shaped sieve can be adjusted by moving the sand mortar shaft up and down. Adjustable rubber rice knives are installed equidistantly around the whitening chamber to reduce the speed of the rice flow and increase the speed difference between the rice grains and the sand mortar. Adjusting the rice knife can increase or decrease the degree of whitening.
The white rice flows out from the outlet at the bottom of the whitening chamber, and the rice bran is discharged through the sieve of the rice sieve. The roller of the horizontal emery roller rice mill is cylindrical, and there is a propeller at the entrance. The surface of the emery roller generally has slanted, spiral or both grinding grooves. The cross section of the grinding trough is sawtooth, V-shaped or semicircular. The rice sieve is cylindrical, with steel rice knives with rectangular or semicircular cross-sections.
