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There are several metasomatic uranium deposits in the area around Mount Isa in Queensland, containing a total of 56,400t of uranium. Many of these ores are refractory in nature, meaning that relatively high leach temperatures (>75°C) and reagent dosages (>50g/L H2SO4) are needed to effectively extract the uranium from them. Also, these ores are hosted in alkaline rock which means that acid leaching...
Refractory uranium ores containing uranium as multiple oxides typically require leaching at elevated temperatures (>75°C) and acid concentrations (>50g/L H2SO4) in order to effectively extract the uranium. Some uranium ores contain large amounts of acid-soluble gangue, such as carbonates or soluble silicates and when the carbonate content exceeds approximately 8%, the acid consumption by gangue...
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