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Song X.,Henan Province Rock and Minerals Testing Center | Tang Z.,Henan Province Rock and Minerals Testing Center | Xu J.,Henan Province Rock and Minerals Testing Center | Zhou X.,Henan Province Rock and Minerals Testing Center | Gao Z.,Henan Province Rock and Minerals Testing Center
Xiyou Jinshu/Chinese Journal of Rare Metals | Year: 2014

The process mineralogy of a complex niobium-tantalum ore interlocked feldspar and quartz minerals was studied. It showed that Nb, Fe and feldspar could be recovered from the complex ore. The main metallic minerals were hematite and ilmenite, and the gangue minerals were potassium feldspar, quartz, mica. Tantalum-niobite existed in the fine grain state, most of them wrapped in hematite. These minerals were finely disseminated and had a complex occurrence relationship in the ore. According to the nature of the ore and the perspective of economic use, a proper beneficiation process was determined. The beneficiation process contained two parts, one was recovering hematite by high intensity magnetic separation-reverse flotation, the other was recovering potash feldspar by desliming-reverse flotation. In this experiment, the potash feldspar concentrate was obtained with K2O 12.18% and recovery 75.29%; the Hematite concentrate was updated with iron grade 60.51% and recovery 70.03%, the hematite concentrate containing Nb2O5 1009.79 g·t-1 and recovery 23.53%, the hematite concentrate containing Ta2O5 147.32 g·t-1 and recovery 35.79%. The niobium-tantalum ores enriched in the hematite concentrate for the comprehensive recovery. The content of Fe2O3 and TiO2 was less than 0.2%, and feldspar concentrates was in line with the first grade of the industry standard (JC/T859-2000). The hematite concentrate met the requirements of steelmaking with iron ore quality second grade. The study improved the economic viability of the use of mineral deposit and provided the basis for evalution and utilization of the mineral deposit.

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