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South Africa has massive Platinum Group Metal (PGM) deposits found in Bushveld Igneous Complex (BIC). Due to depletion of Merensky reef, many companies are now treating UG2 reef which has a high chromite content which has negative impact in the smelting process of the platinum concentrates. Generally, PGMs are processed by rougher followed by cleaner and re-cleaner flotation banks and the final concentrate must contain less than 3% chromite. The effect of residence time and depressant dosage on PGM recovery and ch...

Froth flotation process has shown superiority in processing of many low-grade ores including iron ores. However, there is need to continue developing cheap, more selective and environmentally friendly reagents. Due to the shortage of high-grade iron ores, many companies in South Africa and other countries are currently working on the beneficiation of low-grade ores and retreatment of tailings. In this paper, the performance of Macadamia oil as a frother on the flotation of low-grade iron ore was investigated. The ...

Due to depletion of high-grade ores, high cost of mining and environmental issues, many mines have reverted to retreatment of slags. The recovery of Nickel from reverberatory furnace slag using sulfurization and flotation was studied. Critical parameters such as sulfurization temperature, sulfurization agent (Gypsum containing 86.87% CaSO4) dosage and time were investigated for the sulfurization process and effect of collector type and dosage, pH, particle size and flotation time for the flotation process. It was ...