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
... consuming 300 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 ...
... consuming 300 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 ...
Página 44
... consuming 104 cwts . of coke , and yielding 116 cwts . of slag lead , with oz . of silver ; the whole loss of lead therefore TUNNER , Leoben , Jahrb . , 1852 , ii . , 154. KARSTEN'S Arch . , 2 R. , Bd . 25 . B. u . h . Ztg . , 1853 , p ...
... consuming 104 cwts . of coke , and yielding 116 cwts . of slag lead , with oz . of silver ; the whole loss of lead therefore TUNNER , Leoben , Jahrb . , 1852 , ii . , 154. KARSTEN'S Arch . , 2 R. , Bd . 25 . B. u . h . Ztg . , 1853 , p ...
Página 59
... consuming 900 cubic feet of coal , 106 cwts . of scrap iron , and 35 cwts . of wrought iron , and producing 238 cwts . ( = 28'65 per cent ) of * DUMAS , angêw , Ch . , iv . , 240. LELIVEC , Journ . d . Min . , xx , 419. BERTHIER , Ann ...
... consuming 900 cubic feet of coal , 106 cwts . of scrap iron , and 35 cwts . of wrought iron , and producing 238 cwts . ( = 28'65 per cent ) of * DUMAS , angêw , Ch . , iv . , 240. LELIVEC , Journ . d . Min . , xx , 419. BERTHIER , Ann ...
Página 63
... consume in 24 hours 53 cubic feet of coal . A charge is completed every 9 hours . The furnace is charged whilst the temperature is still very high from the last operation ; the temperature is kept up till the ore , which is frequently ...
... consume in 24 hours 53 cubic feet of coal . A charge is completed every 9 hours . The furnace is charged whilst the temperature is still very high from the last operation ; the temperature is kept up till the ore , which is frequently ...
Página 72
... consuming 40 to 45 per cent of the weight of the ore in charcoal ; 91 cubic feet of air are used per minute . Only 40 to 50 per cent of lead were produced at the smelting of these ores in small cupola furnaces . THE AMERICAN HEARTH ...
... consuming 40 to 45 per cent of the weight of the ore in charcoal ; 91 cubic feet of air are used per minute . Only 40 to 50 per cent of lead were produced at the smelting of these ores in small cupola furnaces . THE AMERICAN HEARTH ...
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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