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Quartz With Iron Pyrites Copper And Arsenical Pyrites Pictures

A more recent paper, roasting of arsenical gold ores and concentrates by f.R.Archibald contains a bibliography listing 23 references on the subject of roasting gold and silver ores.There are four general types of roasting furnace in use the horizontal, multiple-spindle type, of which the edwards furnace and modifications of it are typical.

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