On Economy of Fuel Particularly With Reference to Reverberatory Furnaces for Th
On Economy of Fuel Particularly With Reference to Reverberatory Furnaces for Th
Thomas Symes Prideaux
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In each cubic ft. 70 . . 8 80 ' . . 10-81 90 14-5 Now, 4000 cubicfeetofairperminute=240, 000 cubic feet per hour = 5, 760, 000 cubic feet per day, is a common quantity for a blast furnace to consume, and therefore, if we suppose the state of saturation of the air to be '75, such a furnace will receive per day in the air of the blast, 1364 Ibs. Avoirdupois of water, when the temperature is 30, and 4, 937 Ibs, or nearly four times the quantity, when the thermometer stands at 70. E 9 82 ECONOMY ON... FUEL. melts at 2, 1 9 2, it follows that the gases, when burned with hot air, would yield a temperature more than sufficient to melt iron, l^or the futility of the use of hot air for such an object, I refer the 3-eader to the remarks on attenuated flame, pars. 110 and 112. In the next place, the temperature attainable by the gases is over- stated, and that required for melting cast iron ifWfferstated, the most reliable observations, those of Daniel, fixing its melting point at 2, 786. However, the very fact of there being a difference of 600 in the melting point assigned to cast iron, by different observers, shows how unsatisfactory are arguments founded on such theoretical deductions, when compared with the very con- c'asive evidence on the subject lying open before us, in the results attending the use of coal.
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