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- W2054869618 abstract "Silver in gossan ore tailings from conventional cyanidation is present in arsenical potassium jarosite and beudantite. The decomposition of arsenical potassium jarosite between 100-250 °C in saturated lime is characterized by the total solubilization of potassium and the formation of a hydroxyarsenate of iron, lead and calcium. The apparent activation energy of the alkaline decomposition (75-120 °C) is 87 kJ.mol−1. After this process, silver is quickly extracted by conventional cyanidation leaching. The alkaline decomposition of beudantite in the same medium is total at 180 °C also with the formation of a crystalline hydroxyarsenate. Silver can be recovered from gossan ore tailings by alkaline decomposition at 180 °C for 30 minutes and subsequent cyanidation at room temperature." @default.
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- W2054869618 date "2003-03-01" @default.
- W2054869618 modified "2023-10-17" @default.
- W2054869618 title "Autoclave Alkaline Decomposition and Cyanidation of Jarosite-Beudantite Phases from Rio Tinto Gossan Ores" @default.
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- W2054869618 doi "https://doi.org/10.1179/cmq.2003.42.1.29" @default.
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