No cyanide here. It's 2 stage acid leach. Read the ANN.
BBX´s preferred method involves a two-stage acid digestion followed by precipitation of metals from solution. SEM (scanning electron microscope) shots of selected mineral grains within the precipitate (refer Appendix 1) show the presence of gold, silver, platinum, palladium, osmium, iridium, ruthenium and rhodium within a matrix rich in fluorine, chlorine, carbon and sulphur.
Ann: Activities Update, page-58
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