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This study was aimed to increase the floatability of oxide copper from a complex copper sample. For this purpose, sulphidisation processes such as slug and controlled potential sulphidisati...

This study is aimed at determining the optimum mixing ratio and solvent group to extract REEs from nitric leach solution, and the efficiency was tested using three different kinds of extractants, which were prepared to mix three different solvents of Cyanex272, D2EHPA, and HQ. In order to select the best mixture system, different volumes (ml) of solvent extractions were used under optimum conditions (.05 M concentration and pH of 2). The result indicated that the mixture system of Cyanex272 (8 ml) and D2EHPA (2 ml) had the highest separation factor and enrichment ratio in the separation of rare earth element, especially dysprosium. The degree of performance of mixture systems in separation of the rare earth elements indicated that the best extraction systems were in the order of Cyanex272 (8 ml) and D2EHPA (2 ml) > HQ (2 ml) and D2EHPA (8 ml) > Cyanex272 (8 ml) and HQ (2 ml).

This study was aimed to examine the influence of collector dosage, pH, solid content and water type of flotation pulp on copper recovery. The results indicated that recovery was strongly affected by these factors and their influence on the best composition of copper grade and recovery was in the order of water type>solid percentage>collector dosage>pulp pH. As the value of collector dosage, pH and solid content increased to a certain value, the copper recovery was enhanced to a peak and thereafter decreased. This may be due to the balance between reagent concentrations with pH and solid percentage. Copper recovery significantly increased with changing the water type from tap water to distilled water. The best combination of grade and recovery obtained was 7.26% and 81.09% in flotation tests with tap water.