The lay-out, design and construction of chemical and metallurgical plants; detailed descriptions and illustrations of actual layouts and constructions ... other plants, of spelter and copper works, go - Softcover
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. 1911 Excerpt: ...for them may be decided upon. Sampling essentially consists of crushing and dividing. It is performed either by hand or by machinery. When done by hand the materials are first crushed to a suitable size for handling, mixed, and worked into a uniform mass. The mass is then.divided into several parts and one of these parts separated from the remainder. This part is again mixed, divided, and a part separated as before; this same operation being continued until a final sample of the desired size is secured. Usually, however, the material is recrushed once or more times between the dividing operations, the extent of this crushing depending upon the size desired for the final sample. When sampling is performed by machinery, the process is essentially the same, excepting that the material is usually reduced between each of the dividing processes. All up-to-date smelters, whether they treat only their own ores or do custom work, have sampling plants, as only by this means can they keep a check upon the results they are securing. Other metallurgical plants, such as concentration plants, cyanide plants, and lixiviation plants, use sampling plants, to determine primarily the value of the ores they are treating and to keep a check upon the work of the plant. A sectional elevation and plan of a large Automatic Sampling Mill ordinarily rated at a capacity of 35 tons per hour is shown in Figs. 74 and 75. The course of the ore through this mill is as follows: On being received it is fed into a no. 5 Gates rock and ore breaker, which reduces it about to a 3-inch size. It falls to a no. 6 Gates elevator, which raises it to the 60-inch Snyder automatic sampler at the top of the mill. This sampler takes a 15 per cent. cut, the rejections dropping into a distributing hopper dir...
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- PublisherRarebooksclub.com
- Publication date2012
- ISBN 10 1130236137
- ISBN 13 9781130236132
- BindingPaperback
- Number of pages56
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