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 xxii
... Washed , 624 . Extraction of Gold by Washing and Amalgamating Gold Sand Manipulations , 624 . Extraction of Gold by Smelting the Gold Sand . Siberian Experiments , 625 . Extraction of Gold from Earthy Minerals • • 624 625 625 Crushing ...
... Washed , 624 . Extraction of Gold by Washing and Amalgamating Gold Sand Manipulations , 624 . Extraction of Gold by Smelting the Gold Sand . Siberian Experiments , 625 . Extraction of Gold from Earthy Minerals • • 624 625 625 Crushing ...
Página 27
... washed products are not so rich . Furnaces . The smelting furnaces do not require for their construction very refractory materials ( red sandstone ) ; usually two furnaces are placed side by side , and have but one chimney . ( Figs . 1 ...
... washed products are not so rich . Furnaces . The smelting furnaces do not require for their construction very refractory materials ( red sandstone ) ; usually two furnaces are placed side by side , and have but one chimney . ( Figs . 1 ...
Página 29
... washed . Poorer slags are thrown aside or used to repair the hearth . The lead resulting from all these operations is run out from the reservoir upon the floor of the smelting - house , and re- melted in the lower part of the ...
... washed . Poorer slags are thrown aside or used to repair the hearth . The lead resulting from all these operations is run out from the reservoir upon the floor of the smelting - house , and re- melted in the lower part of the ...
Página 31
... washed ore is roasted for about eleven hours , at a temperature not exceeding 800 ° C. , giving an average yield of 1 cwts . of lead . On the lower hearth a previously roasted charge is at the same time worked in the way already ...
... washed ore is roasted for about eleven hours , at a temperature not exceeding 800 ° C. , giving an average yield of 1 cwts . of lead . On the lower hearth a previously roasted charge is at the same time worked in the way already ...
Página 43
... washed , so as to separate the lead that may be entangled amongst it . As a considerable volatilisation of lead takes place in these hearths , they must be connected with proper arrangements for condensation . The charge for this ...
... washed , so as to separate the lead that may be entangled amongst it . As a considerable volatilisation of lead takes place in these hearths , they must be connected with proper arrangements for condensation . The charge for this ...
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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