File:Coking of Illinois coal in Koppers type oven. (1919) (14784174645).jpg

Identifier: cokingofillino1919137mcbr (find matches)
Title: Coking of Illinois coal in Koppers type oven.
Year: 1919 (1910s)
Authors: McBride, R.S. Selvig, W.A.
Subjects:
Publisher: National Bureau of Standards
Contributing Library: NIST Research Library
Digitizing Sponsor: NIST Research Library

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No. 1.—The coke was delivered by the con-veyor over an inclined-bar grizzly screen in the first station.This screen was about 5^ feet long, 4 feet wide, and consisted of1 ->£ inch bars spaced from i>^to iXinches. The oversize wasdelivered in the railroad cars and weighed as furnace coke. Theunder size delivered on a second belt conveyor was carried to asecond screening station, where it passed through an inclined,rotary, cylindrical screen, the first half of which consisted of %-inch square perforations, and the second half ij^-inch squareperforations. The material passing through the ^4-inch perfora-tions was rescreened on a f/i-moh shaker screen to separate thebreeze and pea sizes of coke. The material passing through thei^-inch perforations was called nut coke, and that passing overthe 1 ^8-inch perforations was classified as stove coke. The breeze,pea, nut, and stove sizes were separately loaded in railroad carsand weighed before shipment or storage. Nut and stove sizes,
Text Appearing After Image:
The Coking of Illinois Coal 9 as delivered from their respective bins, passed over shaker feedersbefore going into the railroad cars. The pea and breeze sizeswere thus very completely eliminated from these two domesticsizes. Since the separation of furnace coke by the inclined-bar grizzlyin the first screening station was not considered satisfactory,because the screen was not large enough to handle the quantityof coke passing over it and make a good separation, a changewas made after three days of the test to the second system whichwas as follows: Screening System No. 2.—The inclined-bar grizzly in the firstscreening station was discarded and replaced by a 2>^-inch rotarygrizzly, the oversize of which was delivered directly into railroadcars as foundry or large furnace coke. The coke passing throughthe first rotary grizzly was carried to the second screening sta-tion where it passed over a second rotary grizzly set at 1 finches.The oversize of this second grizzly was designated a

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