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
... lime and coal . This process is in use in England , Spain , and was tried in the Hartz . The French Process is adopted for ores contain- ing pyrites and some silica ; upon treatment in reverberatory furnaces with a sump , little lead ...
... lime and coal . This process is in use in England , Spain , and was tried in the Hartz . The French Process is adopted for ores contain- ing pyrites and some silica ; upon treatment in reverberatory furnaces with a sump , little lead ...
Página 13
... lime , heavy spar , and blende , is advantageously worked on hearths and in reverberatory furnaces ; but those ores which contain a large amount of earthy and siliceous substances , as well as other metallic sulphides , are best treated ...
... lime , heavy spar , and blende , is advantageously worked on hearths and in reverberatory furnaces ; but those ores which contain a large amount of earthy and siliceous substances , as well as other metallic sulphides , are best treated ...
Página 14
... lime . b . English Process , for galena containing more lime , and sufficient silver to make it worth extracting , and also con- taining some zinc blende and heavy spar . c . French Process , for ores containing a large amount of ...
... lime . b . English Process , for galena containing more lime , and sufficient silver to make it worth extracting , and also con- taining some zinc blende and heavy spar . c . French Process , for ores containing a large amount of ...
Página 15
... Lime , in not too considerable quantity ( 10 to 12 per cent ) , acts advantageously both in the roasting process , by ren- dering the mass more difficult of fusion , and also in the reactions of the 3rd period . Iron Pyrites assists in ...
... Lime , in not too considerable quantity ( 10 to 12 per cent ) , acts advantageously both in the roasting process , by ren- dering the mass more difficult of fusion , and also in the reactions of the 3rd period . Iron Pyrites assists in ...
Página 17
... Lime acts favourably if present in small quantity , as it decomposes galena , as well as sulphate of lead , and by preventing the too easy liquefaction of the mass facilitates the reaction ; a proportion above 12 per cent is ...
... Lime acts favourably if present in small quantity , as it decomposes galena , as well as sulphate of lead , and by preventing the too easy liquefaction of the mass facilitates the reaction ; a proportion above 12 per cent is ...
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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