Abstract
A large-scale magnetite deposit containing scandium oxide is located in Yunnan province of China. The reserves of scandium oxide in the deposit are estimated to be > 40,000 tons. With the aid of EDS analysis and polarizing microscopy, samples of the ore were examined, and the different types of minerals containing scandium were identified together with their disseminated features. The results reveal that the useful minerals for scandium pre-concentration are pyroxene, tremolite, hornblende and clay. Based on the sample’s composition, particle size distribution and the occurrence state of scandium, studies were conducted of the pre-concentration of scandium oxide from the low-grade magnetite ore. From the results of these experiments, a beneficiation process was developed and validated based on low-intensity magnetic separation for iron recovery and high-intensity magnetic separation for scandium enrichment.
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