Drying and Sizing

The tail and thru stock streams are then immediately dehydrated to decrease the moisture to approximately 14%. At this moisture, the refined grits and their products and coproducts will have prolonged shelf life. The drying operation is usually 

FIGURE 7.4 Maize degerminators. (a) Schema and photograph (courtesy of Buhler AG, Switzerland) of conical-knobbed maize degerminators. 

FIGURE 7.4 (Continued) Maize degerminators. (b) Schema (courtesy of American Association of Cereal Chemists) and photograph of impact or Entoleter degerminator (www.mills-windfield.com). 

The principles of milling described have been recently adopted by fuel ethanol processors. Maize is fractionated into coproducts and refined endosperm pieces that are further milled into a meal adequate for ethanol processing. The advantage of using fractionated milling is that the coproducts have added value because they are more stable compared to wet-distilled grains and have higher ethanol yields from the refined endosperm fractions used in the biorefineries (Chapter 14). 

The bran is usually channeled to animal feeds, although recently it has started to be further milled and sized for direct food applications. The germ is usually channeled to oil-crushing industries where the oil is mechanically expelled and/or chani-cally extracted with hexane. The pericarp, germ cake, standard meal, and broken kernels are usually combined and hammer milled to produce hominy feed (Chapter 18). 

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Pretreatment is required for HTV processing. Drying and size reduction of wastes are required. Additives such as glass formers may be required. Processing of nonhazardous wastes may not be economically feasible. Treatment of radioactive wastes will produce a radioactive glass that requires special handing or treatment. 

Description The BP/Lummus styrene polymerization technology for the manufacture of regular and flame-retardant grades of EPS is a one-step batch suspension reaction followed by continuous dewatering, drying and size classification. 

Although the extrusion step is a continuous process with a very high throughput, the subsequent steps (spheronization, drying, and sizing) are batch processes, and thus are rate limiting. As a result, the overall extrusion-spheronization process is a batch rather... 

Beside attention to the gasification section, also other system components have to be studied in more detail. Important system components are feedstock pre-treatment (drying and sizing of biomass, coir ression of hydrogen stream), membrane separation of hydrogen (if necessary), gas clean-up, methanation, and the conditioning section, which is required to bring the product gas from the methanation step to the natural gas quality. 

In general, polyelectrolyte complexation leads to formation of insoluble dense precipitate with molecular entrapment of drugs. These complexes are separated, dried, and size reduced to obtain... 

The manufacture of these clay-based catalysts consisted of crushing, drying and sizing the raw clay. The sized clay was then formed into slurry followed by washing. The sized clay was dewatered, dried, ground and sized as the final steps in the process (55). This clay catalyst could then be further formed into cylinders or beads depending on the final usage. 

Creel Oven 1 Oven 2 Plaiter LT furnace HT HM Surface Drying and sizing Collection... 

Ohso Pulverized Dolomltic Limestone is quarried, crushed, kiln dried and sized. Its size, purity and flowability make it attractive for several industrial applications. Its low moisture content minimizes storage and handling problems during cold weather. 

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