Industrial Report on Lead, Zinc and Iron: Together with Notes on Shannon County and Its Copper Deposits (Google eBook)

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Regan & Carter, State Printers and Binders., 1877 - 167 pages
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Page 143 - they were in large flocks containing both species in the proportion of two of the former to one of the latter " (the present)
Page 136 - The tuyere enters the fire about ! inches ; its diameter is 1^ inches ; the bottom plates are not cooled, but rest on the ground, and last from one to three months. A charge is 280 pounds of pig iron, 2-5 being white or mottled iron and 3-5 gray iron. A charge gives a loop of 246 pounds, which is hammered into two blooms (120 Ibs.
Page 129 - The diameter of the blower is 4 ft. ; stroke 4ft. 6 in. ; two cylinders ; number of revolutions per minute, 16. The calculated capacity of the apparatus is 3,612 cubic feet of air per minute ; or, with an average daily production of fourteen tons iron, one ton of iron requires 13.86 tons of air.
Page 130 - The charcoal contains, 8.66 per cent, ash; 497 hygroscopic water, and 86.37 carbon. Estimating the weight per bushel to be at the rate of eighteen pounds, 1.221 tons charcoal are required per ton of pig iron, or 1.053 ton of pure carbon to the ton of iron.
Page 92 - ... it will be found that plenty of lead is produced in Great Britain and elsewhere, quite as suitable for conversion into white lead as that bearing the mark 'WB selected and refined.
Page 150 - If these words have to be taken in their literal sense of comparative susceptibility to fusion, their use, in my opinion, may lead to error. There are, no doubt, some differences in the melting points of different kinds of iron and slag, but these, I apprehend, are trifling and cannot account for the marked alterations, just spoken of, in the quantity of fuel required for mere liquefaction. The actual cause of the lesser quantity of consumption...
Page 150 - ... error. There are, no doubt, some differences in the melting points of different kinds of iron and slag, but these, I apprehend, are trifling and cannot account for the marked alterations, just spoken of, in the quantity of fuel required for mere liquefaction. The actual cause of the lesser quantity of consumption of combustible in small furnaces, I have conceived and described as being due to difference in susceptibility of reduction, and not of fusion. SECTION XLIV. SUPPLEMENTARY REMARKS...
Page 136 - Eighty bushels of charcoal are required per ton (2,4(M pounds) of bloom produced. Each fire requires two hands, and makes only one turn per day. The power for the blowing engine is furnished by the spring. There are two vertical cylinders, 6 feet 2 inches in diameter; length of stroke, 4 feet; number of revolutions, 14 per minute.
Page 129 - R. 6 W., Sees. 1 and 2), owned by the heirs of Thomas James, and operated under the management of William James, Esq., of St. James, is the oldest establishment now in operation in the State. Smelting work was begun at the location as early as 1824. The present furnace is of...
Page 92 - B. selected and refined pig lead,' (the initials being those of Walter Blackett, the producer, and now applying equally to the name of his successor, Wentworth Beaumont.) This pig lead is the produce of certain mines on the Greenwich Hospital estate, in the north of England, which are leased to Mr. Beaumont. It fetched a higher price to the amount of from 5 pc to 7 pc than any other pig lead.

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