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Screening |
Also found in: Dictionary/thesaurus, Medical, Financial, Idioms, Wikipedia, Hutchinson | 0.06 sec. |
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Screening A mechanical method of separating a mixture of solid particles into fractions by size. The mixture to be separated, called the feed, is passed over a screen surface containing openings of definite size. Particles smaller than the openings fall through the screen and are collected as undersize. Particles larger than the openings slide off the screen and are caught as oversize. A single screen separates the feed into only two fractions. Two or more screens may be operated in series to give additional fractions. Screening occasionally is done wet, but most commonly it is done dry. Industrial screens may be constructed of metal bars, perforated or slotted metal plates, woven wire cloth, or bolting cloth. The openings are usually square but may be circular or rectangular. See Mechanical classification, Mechanical separation techniques, Sedimentation (industry) How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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He was, besides, the best sacrifice the higgler could make, as he had supplied him with no game since; and by this means the witness had an opportunity of screening his better customers: for the squire, being charmed with the power of punishing Black George, whom a single transgression was sufficient to ruin, made no further enquiry. I explained our predicament, and stated that with what screening force remained I should continue in the air, making as rapid headway toward St. My old notion of screening the girl, if I could, seemed to have come back on me again, at the eleventh hour. |
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