Losses in Gold Amalgamation: With Notes on the Concentration of Gold and Silver OresSpon, 1890 - 98 páginas |
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Losses in Gold Amalgamation: With Notes on the Concentration of Gold and ... Walter McDermott,P. W. Duffield Visualização completa - 1890 |
Losses in Gold Amalgamation: With Notes on the Concentration of Gold and ... Walter McDermott,P. W. Duffield Visualização completa - 1890 |
Losses in Gold Amalgamation: with Notes on the Concentration of Gold and ... Walter McDermott Visualização completa - 1890 |
Termos e frases comuns
50 per cent advantages assay average base bullion base metals base minerals batea battery belt vanner bullion capacity charge chlorination clear water coarse crushing coarser concen contain copper plates copper-plate amalgamation cost double concentration dwts effective evaporating dish excess of water experience extracted finer free gold Frue vanner gamation GOLD AMALGAMATION gold and silver grade grinding hand tests Huntington mills hydraulic separators hydraulic sizer improved belt increased inflow insure inventors jigs labour Lake Superior large pointed box large settling box loss of gold machinery machines material millmen mining muddy water necessary operation overflow pan amalgamation percentage perfect phurets present quantity quicksilver re-grinding reverberatory furnace revolving buddles revolving screens rich riffle roasting rock particles rolls samples saving settler discharge settling tanks shaking copper simple sizing slimes smelting process specific gravity stamp mill steam stamp sulphides sulphurets tailings tellurium tion tons treated usually
Passagens mais conhecidas
Página 78 - tellurides of the baser metals, the pan process becomes ineffective and expensive. By contact with iron surfaces, heat, and the addition of some chemicals—chiefly salt and sulphate of copper—a partial decomposition of the complex minerals is effected, and some of the silver amalgamated; but the wear of iron, loss of
Página 78 - partial decomposition of the complex minerals is effected, and some of the silver amalgamated; but the wear of iron, loss of quicksilver, cost of power and chemicals, and the production of base bullion, together go far to
Página 28 - for allowing contact with the quicksilver ; besides involving often a loss of gold in the actual roasting, sometimes even to a very marked extent. In roasting some gold ores it is found advantageous to add a small percentage of salt to the charge, but on other ores this increases largely the loss of gold by
Página 27 - amalgamation, the next simplest and most economical process is that of pan amalgamation, which is adopted either on the raw or roasted ore. Usually roasting of gold ores is unsatisfactory as a preparation for amalgamation, and puts part of the gold in a condition most
Página 42 - ores and concentrates can, as a safe general rule, be considered as not adapted to amalgamation without a previous roasting. In some few cases, where the gold is comparatively coarse, a sufficient proportion of it can be extracted by
Página 43 - Works gave unsatisfactory results by all these processes after roasting in a small reverberatory furnace, and nothing but chlorination was found effective when the material was rich in gold. On
Página 77 - Pan amalgamation is effective chiefly on native gold, native silver, chloride of silver, and simple sulphide of silver. When the silver is in combination with sulphides, antimonides, arsenides, and