The Gypsum of Michigan and the Plaster Industry

The Gypsum of Michigan and the Plaster Industry

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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1904 edition. Excerpt: ...the west. This mill and the No. 2 mill are located on the L. S. & M. S. R. R. track about two and one-half miles west of the city of Grand Rapids. The Eagle mill No. 2 is located a short distance west of mill No. 1 and is equipped with a Godfrey double nipper and Lowe cracker and the fine grinding is done in three runs of vertical emery stone mills and the regrinding of very fine plaster in two runs of 80-inch buhrs. There are three ten-foot kettles arranged similar to the plan of the No. 1 mill. The English Mitt and Mine. The English mill of the United States Gypsum Co. is located to the west of the mills last described. It is a three story frame building 40 by 50 feet with a mixing and grinding room to the east 60 by 40 feet. The rock is brought in mine cars from the shaft down a slight incline to the second floor of the mill where the nipper and cracker are located. The broken rock is then elevated to bins above the two runs of buhrs, and one vertical emery stone mill, where the rock is ground to flour which is carried by a screw conveyor and elevated to the third floor above the two ten-foot kettles. The mill is also equipped with three sets_of regrinding buhrs for the finer plaster. The hot calcined plaster is dumped into lire proof bins and then elevated and carried by conveyors to the ware room at the east where it is sacked for the market. This mill was erected in 1900 and has a daily capacity of 150 tons. The gypsum rock is obtained from under the same hill that is worked to the east by the Grand Rapids Plaster Co., but it is reached by a vertical shaft on the hillside, 62 feet deep. The shaft is six by eight feet in section, containing double elevators and an independent air shaft. The elevators work alternately and are operated more

Product details

  • Paperback | 92 pages
  • 189 x 246 x 5mm | 181g
  • Miami Fl, United States
  • English
  • black & white illustrations
  • 1236583442
  • 9781236583444