H1-KV-19B flender n bipex Helical gear boxes H1

Flender/Flender Gear Units/Helical gear boxes H1

.3 Reduction of Puried Endosperm Particles into Flour Purication passages segregate the stocks into pure endosperm, composite particles, and branny material. The branny material ends up with the lower break stocks where theremaining endosperm is removed and bran is separated. Composite materials go to nelycorrugated rolls where they are lightly ground to clip the endosperm and scratch off thebran pieces attached to them. These ground materials are sifted to allow the bran to goto the lower breaks and the retrieved endosperm particles, after being puried, are sent with other puried endosperm particles to be ground into ne our particle size in the reduction rolls. This entire system of grinding the composite particles followed by siftingand purication is referred to as the scratch orsizing system. Reduction of puried endosperm particles, from semolina, middlings, and sizing puriers, into our is the ultimate goal in the production of rened white our. The objec-tive in this part of the process is to grind pure endosperm particles into our as much aspossible. Because this material to be ground is virtually free of any bran contamination, there is no risk of shredding or powdering the bran along with endosperm as it was in the previous parts of the operation. Grinding is done on smooth rolls, for the aim here is size reduction. This process of size reduction is achieved on gradual basis involving several grinding passages, eachof which is followed by sifting. The number of grinding and sifting steps could be at leastsix and as high as ten or more. Grain-Milling Operations 2 The puried endosperm particles are directed to the rst reduction grinding passage where roll gap is narrowed to yield substantial quantity of our. The ground materialis sifted and the our is removed by sifting through the ne apertures of nylon cloth sieves.The material that remains on top of the sieves is then directed to the second reduction-grinding passage for further size reduction. Even the most