. Machinery for metalliferous mines : a practical treatise for mining engineers, metallurgists and managers of mines. ributes them in an even layer over THE ROUND BUDDLE. 0^0 the fixed head; the liquid stream, which should be in a uniform thin film,falls over the edge of the fixed head, and distributes itself outwards overthe sloping floor of the buddle towards the circumference, depositing inits passage the rich ore it contains, according to its specific gravity, therichest first, close to the fixed head, and the poorest at the each of the four arms a board is attached, carry
. Machinery for metalliferous mines : a practical treatise for mining engineers, metallurgists and managers of mines. ributes them in an even layer over THE ROUND BUDDLE. 0^0 the fixed head; the liquid stream, which should be in a uniform thin film,falls over the edge of the fixed head, and distributes itself outwards overthe sloping floor of the buddle towards the circumference, depositing inits passage the rich ore it contains, according to its specific gravity, therichest first, close to the fixed head, and the poorest at the each of the four arms a board is attached, carrying a cloth or a seriesof brushes, which sweep round and smooth out each successive layer ofmineral as soon as formed. In some cases sprays of fresh water are usedinstead of the cloths or brushes, the number of revolutions in either casebeing 3 or 4 per minute, or faster, according to the mineral treated. The outflow of the waste waters takes place through the small sluicegate shown in the circumference of the buddle. In the door of thissluice is a vertical line of holes, and, as the layer of mineral thickens on. Fig. 208.—TiiF, Round Buddle. the floor, a plug is placed in the lowest hole, and so successively up theseries, until the full thickness of the deposit equal to the height of thecone is reached. At this point the machine is stopped, a groove is cutfrom the cone to the circumference, and samples of the ore are taken andwashed on a vanning shovel. By this means an idea is formed as towhere the divisions should be made; for at the head the concentrates arerich in galena, and then follow the mixed ores, either of galena, blende,and gangue, if blende is present, or of galena and gangue, if it is qualities of the mixed ores are formed. Rings are formed aroundthe deposit on the buddle to indicate the division lines. The rich heads,are taken out and reworked once in another buddle, when they will berich enough to be sent to the dolly tub (fig. 221-223). The middle
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Keywords: ., bookcentury1900, bookdecade1900, bookpublishernewyo, bookyear1902
