MINING.

Waikato Times, Volume xxx, Issue 2430, 7 February 1888, Page 3

MINING.

The Globe Mill Gold Quartz Crusher. Mn James Crkbbik, the representative of the Globe Mill Company, of Olrl Rroartstreet, Loudon, is ou a visit to this colony, g-nrt purposes making a personal inspection of our mining districts, where he will at the same time make known the superior claims of the company s crushing machinery to the notice of our mining community. Mr Crebhir. passed through Hamilton last week, on his way to Te Aroha and the Thames, and through hitn we have been placed in possession of some particulars of their Globe Mills, which have drawn towards them a considerable amount of interest from those engaged in the mining industry. They entirely supersede the stampers on the grounds of thorough efficiency, economy in working, strength of parts, portability, and simplicity in working. The stamps are defective in many respects and are made up of many parts liable to get out of order ; they are heavy to carry, awkward, and require a firm and costly foundation. The Globe mills 011 the other hand have only seven parts, easily carried and put together with very little foundation. The working quartz passed through the mill comes out of the settling chambers in three degrees of fineness, ranginc from gritty particles suitable for am 1 Igamation to soft stuff minutely p'lh'rrisod. The whole mill stands only four feet high, or, including the hopper, scarcely six feet. It will pulverise, if required, to such a degree of fineness, by wet or dry process, that !)!> per cent, of the material will pass a 55 mesh, and 75 per cent. 100 mesh sieve, equal to 10,000 holes to the square inch. The mills can be made capable of turning out from ten to one hundred tons per day of twenty-four hours, by either wet or dry process. We will now describe the machine which consists of a spherical ball revolving in a vertical circular path, driven by two flexible discs fixed on a horizontal shaft running through the centre of the mill, all made of a special hard steel. The mill requires twenty-horse power to pulverise t!0 to 75 tons of ore per day, a quantity equal to the work of a 40-stamp battery. There are machines of smaller size to do a less amount of work with less power in proportion. The screen used is No, (50 mesh, through which 75 per cent, of the pulverised ore will pass, being much finer than the ore crushed by the ordinary stampers. The ore fed passes and is crushed between the revolving ball which moves with an easy motion, and is grasped by the two flexible discs. The ore, broken to the size described, mixed with water, is fed into the hopper whence it pnsses through the screens. Any ore not crushed sufficiently fine at the first revolution of the ball is brought back under the ball and pulverised oy the succeeding revolutions. Numerous testimonials from mine managers, in California and elsewhere, testify to the excellence and superiority of the Globe mill. It should commend itself to mining companies at the Thames, Te Aroha, &c., where there are large accumulations of tailings from the stampers, which this mill will reduce to satisfactory and profitable results.