A Practical Treatise on Metallurgy: Adapted from the Last German Edition of Prof. Kerl's Metallurgy, Volúmenes1-2Longmans, Green, and Company, 1868 |
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Página 30
... tons of ore and 480 tons of wood . Two assis- tant workmen are required , each receiving about Is . wages for a day's work of 12 hours , and also six workmen for 725 shifts of 23 hours each , receiving 3s . 2d . per shift . The expense ...
... tons of ore and 480 tons of wood . Two assis- tant workmen are required , each receiving about Is . wages for a day's work of 12 hours , and also six workmen for 725 shifts of 23 hours each , receiving 3s . 2d . per shift . The expense ...
Página 31
... ton of ore , yielding o'620 to 0650 ton of lead , amounts to- Wood ( 1'11 ton ) Labour • Tools , wear and tear , and sundries Total · .. £ s . d . 6 13 O 9 11/1 O 2 £ o 18 83 About 302 tons of ore , yielding 189 to 198 tons of lead ...
... ton of ore , yielding o'620 to 0650 ton of lead , amounts to- Wood ( 1'11 ton ) Labour • Tools , wear and tear , and sundries Total · .. £ s . d . 6 13 O 9 11/1 O 2 £ o 18 83 About 302 tons of ore , yielding 189 to 198 tons of lead ...
Página 41
... tons of coal and about 3 cwts . of lime . Four workmen attend to the furnace , two of them working for twelve hours ... ton of ore , con- taining 78 per cent of lead , yields o'630 ton = 63 per cent of raw lead , containing 10 ounces of ...
... tons of coal and about 3 cwts . of lime . Four workmen attend to the furnace , two of them working for twelve hours ... ton of ore , con- taining 78 per cent of lead , yields o'630 ton = 63 per cent of raw lead , containing 10 ounces of ...
Página 44
... tons of slag , or 4 tons of the mixture , are smelted in 24 hours , with ton of coke , yielding about 1 ton of lead , and slags containing 5 or 6 per cent of lead . In fourteen days about 48 tons of slag are smelted with 13.50 tons of ...
... tons of slag , or 4 tons of the mixture , are smelted in 24 hours , with ton of coke , yielding about 1 ton of lead , and slags containing 5 or 6 per cent of lead . In fourteen days about 48 tons of slag are smelted with 13.50 tons of ...
Página 45
... tons of slag , smelted with cold blast , con- sumed 392 cubic feet of air per minute ; the expense was- For labour coke , 7 tons at 24s . 6d . Total Thirty - five tons of similar slag smelted consumed 300 cubic feet of air per minute ...
... tons of slag , smelted with cold blast , con- sumed 392 cubic feet of air per minute ; the expense was- For labour coke , 7 tons at 24s . 6d . Total Thirty - five tons of similar slag smelted consumed 300 cubic feet of air per minute ...
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Términos y frases comunes
24 hours Altenau amalgam amount of silver antimony argentiferous arsenic baryta bismuth black copper blast calcined cent of copper cent of lead cent of silver charcoal charge chiefly clay coal cobalt coke condensation copper matt crucible cubic feet cupelling cupola furnaces cwts decomposed desilverised dross extraction flue fluxes formation formed Freiberg fuel furnace ends fused galena gold hearth heated impure inches iron pyrites Lautenthal lead containing lead matt lime liquation litharge loss of lead loss of metal loss of silver mercury metre mixed mixture muffles nickel oxide oxide of lead oxidised Pattinson's process precipitated production quantity quartz raw lead raw matt reduced refined residues resulting reverberatory furnaces rich lead roasting mass roasting process schlich silica silver per cwt slags smelting process sodium sodium amalgam spar speiss sulphate of lead sulphide sulphuric acid sump temperature treated tuyere u. h. Ztg Upper Hartz volatilisation whilst yield zinc blende