Transactions of the American Ceramic Society, Containing the Papers and Discussions Volume 14 (Paperback)

This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1912 edition. Excerpt: ...is more plainly seen in Fig. 17, and consists of an oblong box with a horizontal revolving shaft through the center. To this shaft arms are attached which stir the kaolin into a finely divided slip. From the washer the kaolincharged water passes to the sand wheels, which are shown in connection with the washers in Fig. 18. These sand wheels are merely wheels with scoop buckets attached to the radiating spokes, and these scoops scrape the sand from the bottom of the machine and in rising allow the kaolin and water to drain off before the scoop reaches an elevation which will permit of the sand dropping off the scoop. The back of the scoop is sloped toward the outside of the machine so that when the sand slides out it is projected at a 450 angle from the scoop and falls out Fig. 17.--Kaolin washer and sand wheels. End view, showing power connection by pulley with the washer and by gear with the two sand wheels. I;ig. 19.--Kaolin washing plant, including washer and sand wheel shown in Pig. 17. Mica troughs in left foreground. Top frame of settling tanks shown in right foreground. Franklin Kaolin and Mica Co., lotla liridge, Macon Co., North Carolina. side the machine. In some plants a small jet of water is impinged upon the scoops when they reach the desired elevation and thus the sand is more readily dislodged. Most plants find that at least two batteries consisting of a washer and sand wheel each are necessary. From the sand wheel the crude kaolin floats through a sand box which is of no standard size but is merely a tray-like box where the force of flow created by the washer and sand wheel is overcome by increased surface, and the sand which has not already been removed can be allowed to settle. The outlet of this sand box should be so...