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Keywords: silver manganese ores, silver, recovery, mineralogy, selective leaching Introduction Either direct flotation or cyanide leaching of Ag-Mn ores usually results in very low silver recovery because silver is either encapsulated or present in the crystal lattice of manganese oxides in the ores …

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The manganese content of some iron ores used in Greece led to speculations that steel produced from that ore contains additional manganese, making the Spartan steel exceptionally hard. Around the beginning of the 19th century, manganese was used in steelmaking and several patents were granted.

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A "refractory" gold ore is an ore that has ultra fine gold particles disseminated throughout its gold occluded minerals. These ores are naturally resistant to recovery by standard cyanidation and carbon adsorption processes. These refractory ores require pre-treatment in order for cyanidation to be effective in recovery of the gold.

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Effect of Manganese on Silver Leaching View Larger Image In Mexico and elsewhere there are large bodies of valuable silver ore containing manganese which present great, and hitherto insuperable, obstacles to a satisfactory extraction by cyanide.

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The leaching efficiency of manganese greatly increases with the increase of the H 2 SO 4 addition, then tend to constant when H 2 SO 4 addition reaches 89% (ω 98% concentrated H 2 SO 4 /ω ore), with 99% Mn recovery and 20% Fe recovery.

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Separation of silver from silver-manganese ore with cellulose as . The silver in some silver-manganese ore with a grade of 3.15×104 was concentrated by a combined beneficiation technique including silver-manganese ore. magnetic separation. flotation. reducing leaching Gold, 22 (7) (2001), pp.