Sorghum cleaning and grading principle, methods & equipment and rice processing is basically the same.
Grading is the separation of sorghum grains of different sizes. Large grains of grain solid, cortical thin, easy to grind to go, while the small particles are the opposite. If you do not grading, often large particles over grinding, small particles peeled, resulting in uneven accuracy, broken rice increased, the yield decreased. There are two sub-processing methods: in the clean-up process and by the rice mill and then sub-coarse grinding. Coarse grinding has shelling effect, it can improve the classification effect.
Grading equipment generally use slip screen and vibrating screen, the separation of small particles in the total flow control of 5 to 10%. The pellets may be individually milled or temporarily stored and then staggered with the same rice mill and large grain. Milling methods with the original grain situation is different, there are general sorghum rice, high moisture rice sorghum, dry and dry sorghum rice, silty sorghum milled 4 kinds. But generally are divided into coarse grinding and fine grinding two stages, supplemented by the middle addition to chaff equipment. Wipe the rice processing and equipment with the rice processing.
High-moisture sorghum processing is generally carried out in winter, the free water of grain frozen, endosperm expansion and full, hardness increases, crushing the cortex easier, coarse grinding can be a large number of peeled. Drying and dry sorghum surface cortex contraction, and endosperm binding closely, while the internal structure of endosperm loose, coarse grinding to increase the role of grind, fine grinding to light and fine; can also be used wet milled, the first spray of water 1 ~ 2%, then milled 40 to 60 seconds immediately after the grinding, than the dry method can increase the rate of about 1 to 3%.
The structure of endosperm of silty sorghum should be loosened, the crushing pressure should be reduced, the speed of coarse grinding should be high, the speed of fine grinding should be low; or the two rice mills should be parallel connected to reduce the flow.
Second, sorghum product mix and product use Small sorghum is processed into sorghum rice and stored in a storage bin. The sorghum is mixed in the large grain sorghum at the outlet with a flow rate regulator. Light color, fresh sorghum rice containing tannin less, made of granular or powder finished food for human consumption. Dark color, deep tannin content of sorghum can be used for starch, wine and vinegar and so on.
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