Fine grinding and extraction(5)

The thin slurry after separating the germ by the secondary cyclone separator is separated and extracted through a pressure curved screen. The material under the sieve is crude starch milk. The crude starch milk is merged with the crude starch slurry separated by fiber washing and then enters the starch separation process; the material on the sieve enters the impact needle mill for fine grinding to maximize the release of free starch combined with the fiber. The bound starch in the finely ground slurry does not exceed 10%. The finely ground slurry enters the fiber washing tank.