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Improved Gold And Silver Extraction From A Refractory

The pretreatment of an antimonial refractory gold and silver ore was investigated using alkaline sulphide leaching. The ore assayed 20 gt Au and 220 gt Ag and contained predominantly quartclay and barite and to a lesser extent sulphides such as pyrite stibnite sphalerite inkenite Pb 9 Sb 22 S 42 and andorite Sb 3 PbAgS 6.The latter mineral was identified to be the most important

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