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 10
... bottom of which the reduced lead ( as chief product ) continually runs off , whilst a smaller quantity of lead is obtained by mixing coal with the residues , which are rich in oxide . This process is adopted at Bleiberg in Carinthia ...
... bottom of which the reduced lead ( as chief product ) continually runs off , whilst a smaller quantity of lead is obtained by mixing coal with the residues , which are rich in oxide . This process is adopted at Bleiberg in Carinthia ...
Página 20
... bottom of the furnace ) , oxysulphide and sulphide of lead , with foreign substances more or less transformed . The oxides act upon the sulphides in a pasty but not in a liquid state . In the latter case the oxysulphide is not ...
... bottom of the furnace ) , oxysulphide and sulphide of lead , with foreign substances more or less transformed . The oxides act upon the sulphides in a pasty but not in a liquid state . In the latter case the oxysulphide is not ...
Página 42
... bottom of the furnace is filled to a height of 17 inches ( that is , to within 2 or 3 inches of the tuyere ) with coke rubbish reduced to coarse powder and beat strongly down . After each smelting shift , this bed must be made anew ...
... bottom of the furnace is filled to a height of 17 inches ( that is , to within 2 or 3 inches of the tuyere ) with coke rubbish reduced to coarse powder and beat strongly down . After each smelting shift , this bed must be made anew ...
Página 43
... bottoms , and a variable quantity , usually 50 parts , of rich hearth slags . The lime of the reverberatory slags becomes scorified by the silica and alumina of the coal ash and furnace bottoms . About six hours after having kindled the ...
... bottoms , and a variable quantity , usually 50 parts , of rich hearth slags . The lime of the reverberatory slags becomes scorified by the silica and alumina of the coal ash and furnace bottoms . About six hours after having kindled the ...
Página 46
... bottom is composed of a mixture of coke dust and fire - clay , slightly moistened , and well beaten to the height of the breast - pan , which stands nearly three feet above the level of the floor . Above the breast - pan is an arch , so ...
... bottom is composed of a mixture of coke dust and fire - clay , slightly moistened , and well beaten to the height of the breast - pan , which stands nearly three feet above the level of the floor . Above the breast - pan is an arch , so ...
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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