how to roast gold before leaching

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In this gold sulphide concentrate three main reasons explain most of the variability response found at leaching tests: (i) gold exists as free and non-free particles with sizes of <10 mm to >100 mm; (ii) the product has completely roasted particles, as well as partially and almost intact sulphides particles; and (ii) the granulometric composition of the samples is quite different and gold in finer fractions is higher than in coarse ones.

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