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. 1898 Excerpt: ...Reef, travelling belts as at the Meyer and Charlton, and circular tables as used at the Robinson. Of these the travelling belts and '.cular tables preferred and the latter give most satisfaction because of the less wear and tear attending their running, but the wide floor they require is somewhat of an objection to ...
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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. 1898 Excerpt: ...Reef, travelling belts as at the Meyer and Charlton, and circular tables as used at the Robinson. Of these the travelling belts and '.cular tables preferred and the latter give most satisfaction because of the less wear and tear attending their running, but the wide floor they require is somewhat of an objection to them. In the Langlaagte Royal main headgear there are two such tables, each 24 ft. diameter. An innovation in connection with sorting at the Wolhutcr Mine deserves notice. Here Mr. Britten, the general manager, has two grizzlies--one coarse and one fine--arranged one above the other in order to obtain two products for sorting, the idea underlying the practice being that if the coarse and fine ore are sorted together the lumps cover and hide the latter to some extent and so interfere with satisfactory sorting. Regarding the construction of circular sorting tables it is well to point out that central vertical shafts are being abandoned in favour of supporting the tables on a rail and flanged wheels. BREAKING. Turning to crushers we have Blake machines as at the Treasury and Lancaster, Gates as at the Robinson, Comets at the Jumpers and Crown Deep, and Wells' breakers at the New Primrose and Glencairn Mines. To their comparative freedom from vibration and their great capacity the gyratory crushers owe their extensive adoption here, for these qualities were such as were desired in machines for the high headgears and central stations. Blake machines are, nevertheless, doing excellent work in places and their wear and tear is much less than that of the Gates type of which the repairs and renewals are also of a far more troublesome nature. Fine crushing in the breaker station is growing in favour and it is not unlikely that the practice of two-stage bre...
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All Editions of Present Day Metallurgical Engineering on the Rand; With an Appendix on the Economics of the Transvaal Gold Mining Industry. by Hennen Jennings
