. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . largeplant the residues are first tipped upon a grate of certainmesh. Pieces which are too large to fall through arebroken up with a hammer or run through a crusher. Fromthe grate they pass through a sifting drum, which sepa-rates them into two sizes. They are then passed to theseparating machine where the slag on the one side, andcoal and coke on the other side, fall into separate channelswhich may lead straight into cars or wagons 1 shows a movable plant of the ty{)e used on th
. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . largeplant the residues are first tipped upon a grate of certainmesh. Pieces which are too large to fall through arebroken up with a hammer or run through a crusher. Fromthe grate they pass through a sifting drum, which sepa-rates them into two sizes. They are then passed to theseparating machine where the slag on the one side, andcoal and coke on the other side, fall into separate channelswhich may lead straight into cars or wagons 1 shows a movable plant of the ty{)e used on therailways, with a working caj>acity of two tons per hour. The separating machine is, of course, the principal partof every unit. The machine consists mainly of a shakingfeeder a, and a magnetic drum b. Smaller plants aresometimes provided with an elevator to haul up the resi-dues, and the grate and the sifting drum are substitutedby a sieve which is fitted to the shaking feeder to separatethe two sizes. \ery large pieces are cast on to a mo\ingband on the side, where thev mav be sorted bv FIG. 2. MAGNETS FOR RECOVERING COAL FROM SLAG ANDASHES The feeder delivers the residues on to the dnmi. Fig. 2,and the coal and coke, being non-magnetic, are thrownoff, while the slag is held to it by the action of themagnet, until it is carried past an iron sheet, which keepsthe fuel and the slag apart after separation. The magnet, which is stationary inside the revolvingdrum, consists of one, two or four fields, according to thesize of the machine. Corresponding to the number offields, the feeder has two or four narrow channels leadingin to the druuL I^ach field is divided into three . strong one on the upjier side, the stronge^st in the middleto counteract the centrifugal force, and a weaker sectionbelow which carries the slag to the lowest jtfirt of thedrum, where it falls off. .\ drum of two fields separates 41 RAILWAY AND LOCOMOTIVE ENGINEERING February, 1923 about on
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectrailroa, bookyear1901
