A supplement to Ures Dictionary of Arts, Manufactures, and Mines, : containing a clear exposition of their principles and practice. . understood by reference to the annexed engrav-ing, Ji(i. 514, in which a is the conical floor, fornKnl of wood, and about 18 feet in diameter,on which the stuff is distributed ; b is a cone supporting the upper part of the apparatus,and serving to effect the equal distribution of the orey matter, d is a wheel for giving mo-tion to the arrangement; e, a funnel lunforated with four holes and furnished at top with anannular trough ; f f are arms carrying two brushe
A supplement to Ures Dictionary of Arts, Manufactures, and Mines, : containing a clear exposition of their principles and practice. . understood by reference to the annexed engrav-ing, Ji(i. 514, in which a is the conical floor, fornKnl of wood, and about 18 feet in diameter,on which the stuff is distributed ; b is a cone supporting the upper part of the apparatus,and serving to effect the equal distribution of the orey matter, d is a wheel for giving mo-tion to the arrangement; e, a funnel lunforated with four holes and furnished at top with anannular trough ; f f are arms carrying two brushes balanced by the weights G G ; H is alaunder for conducting the stuff from the pit i ; k is a receptacle in which the slimes mixedwith water arc worked up in suspension by the tormentor, which is a wooden cylinder pro-vided with a number of iron spikes ; l is a pulley taking its motion from a water-wheel, andVol. III.—55 866 ORES, DRESSING OF. M a circular sieve fixed on the arbor n. The stuff at K is gradually worked over a bridgeforming one of the sides of a catch-pit between the sieve M and the tormentor, from whence 514. it passes off into the sieve, by which the finer particles are strained into the pit i, whilst thecoarser, together with chips and other extraneous matters, are discharged on the inclinedfloor in connection with the launder o. From the pit i the stuff flows by the launder n intothe funnel e, and after passing through the perforations flows over the surface of the fixedcone B, and from thence towards the circumference, leaving in its progress the heavier por-tions of its constituents, whilst the surface is constantly swept smooth by means of the re-volving brushes. By this means the particles of different densities will be found arrangedin consecutive circles. The arms usually make from two and a half to four revolutions perminute, and a machine having a bed 18 feet in diameter will work up from 15 to 20 tonsof stuff per day of ten hours. Oennan Rotating
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Keywords: ., bookcentury1800, bookdecade1860, bookpublishernewyo, bookyear1864
