General Metallurgy |
Other editions - View all
Common terms and phrases
acid alloy amount apparatus Berg Bituminous bituminous coal blast bottom brick briquettes brown coal calorific power cast-iron cent chamber charcoal charge Chem chemical chemical compounds chimney clay coal coke combustion compound cooling copper crucible curve cylinder decomposed diam diameter discharge dust Eisen electrolytic engine enters eutectic filter flue fuel furnace gases H₂O hearth heat horizontal Inst Iron Age iron blast-furnace J. I. and St lead Lignite liquid lower magnesite metal Metallurgie mill oven oxide pass peat pipe plant plate pressure producer pulp pump pyrometer retort reverberatory reverberatory furnace roasting rolls shaft shown in Fig silicates sintering SiO2 slags slime smelting solid solution specific gravity Stahl steam steel sulphide TABLE tank temperature thick tons tube valve vertical volatile weight
Popular passages
Page 507 - Ampere is the unvarying electric current which, when passed through a solution of silver nitrate in water in accordance with standard specifications, deposits silver at the rate of 0.00111800 gram per second.
Page 740 - The slime-pulp before filtration should be settled to as thick a consistency as possible consistent with ready handling by pumps and in pipes. 4. The temperature of the slime-pulp should be maintained between 20° and 30° C. or higher. 5. The temperature of the wash-water and the pulp should be the same. 6. Vacuum-pressures should be varied until the proper intensity for the given slime is obtained. 7. Where very clayey slime is to be filtered, as much fine sand (limited as stated above) should...
Page 426 - ... slides on its planed bottom over the planed top of the suction-box, thus making an air-tight joint. A pair of cast-steel sprocketwheels, turning inside of concentric guide-rails, lift the train of pallets from the lower to the upper track by engaging their teeth with the roller-wheels, and launch each pallet in a horizontal path under the feed-hopper and igniting-furnace, and over the suction-box. In a train of pallets in action, all the joints are kept closed, and air-tight, by the pallet being...
Page 789 - ... proportional to the difference between the fourth powers of the absolute temperatures of the hot parts of the furnace and the boiler plate.
Page 427 - ... be accomplished by almost any kind of flame that will give a quick, intense heat. The amount of heat required at this point of the operation is exceedingly small and the cost of ignition correspondingly low. The wide variety of suitable means makes it possible to meet almost any local requirements. The complete cycle of operations is as follows : A pallet being pushed outward tangentially from the top of the sprocketwheels, passes under the feed-hopper, where it takes its load of ore in the form...
Page 740 - The proportion of clayey material in ores which are to be subjected to " all-sliming " and nitration should be maintained at a minimum. 2. The slime-pulp should be as free as possible from sands coarser than a No.
Page 427 - breaking-roller " prevents the prying action from extending too far back, and tends to form a line of fracture. This roller, however, is not essential in all cases. On reaching the curve of the guides, the pallets one by one drop into the guides, each strikes the pallet which has preceded it and, at the same time, discharges its load of sinter-cake, and shakes free the slots of the grates. The force of the blow can be regulated by the gap left in the train of pallets at this point. The weight of...
Page 762 - When the orifice has been reduced to the maximum normal size for any given fan, further diminishing it causes but slight elevation of the blast pressure; and, when the orifice becomes comparatively small, further diminishing it causes no sensible elevation of the blast pressure, which remains practically constant, even when the orifice is entirely closed.
Page 299 - CO,. most marked along the walls, and the intense heat produced on the interior surfaces of these coke chimneys causes clinkers to fuse to the brickwork. Practice therefore demands that the thickness of the fire be limited, that steam be used to avoid extremes of temperatures, and that the mass be kept thoroughly broken by frequent poking.
Page 427 - ... the same time comes within the influence of the downward-moving currents of air, induced by the suction-draft; these carry the sintering action progressively downward until it reaches the grates. The roast-sintering operation is complete, the cake is discharged by dropping into the discharge-guides, and the pallet crowds its way back to the sprocket-wheels, is slowly raised to the upper tracks, and begins a new cycle. A straight-line machine of the size described with effective area of 31.25...