about tantalite-columbite mineral separation
Columbite-tantalite ore is usually multi-metal minerals of tantalum, niobium, tin, tungsten, lithium, beryllium etc. It is usually complex about composition with its low content, big density, and crisp nature. The main method to separate tantalum-niobium is gravity separation, magnetic separation, floatation separation, and chemical treatment while in most situation combination flow sheet will be adopted. Usually, the whole columbite-tantalite processing line covers rough separation and fine selection.
Gravity separation is the main way to beneficiate columbite-tantalite ore while sometimes combination of gravity separation-floatation separation-gravity separation, gravity separation-floatation separation, and gravity separation-magnetic separation-floatation separation can be involved.
About the gravity separation of raw columbite-tantalite mineral enrichment, muilti-milling and multi-gravity separation is mainly used. During the separating machine is usually for each milling machine to recover the liberated columbite-tantalite granules. Crushing and milling is usually not needed for columbite-tantalite sand ore with its high degree of dissociation. Screening is used before gravity rough separation to remove the block stone or gravels, and the fine output from screen can be separated by columbite-tantalite jig separator. The rough concentrate from jigger can be upgraded further by shaking table.
Niobium ore magnetic separation machine is kind of magnetic beneficiation equipment. For Niobium ore, it needs liberation of niobium liberation from the impurities. Niobium mineral are usually together with magnetite, so magnetic concentrator can help to get niobium concentrate mixed with iron. This magnetic separator has a feeding size range of -5mm with a big treatment capacity, a high recovery rate and great concentration efficieny.
preconcentration of low-grade tanb deposit using physical separation methods | springerlink
Ore from the Jinzhulong TaNb deposit was processed using a combination of gravity concentration and magnetic separation to upgrade the columbitetantalite fines. Two flowsheets, namely for gravity concentrationmagnetic separation (the conventional flowsheet) and magnetic separationgravity concentration (the novel flowsheet), are proposed herein, and the factors affecting the performance of gravity/magnetic separation were studied to optimize the flowsheets. Compared with the conventional flowsheet, the novel flowsheet was more effective for columbitetantalite beneficiation and beneficial to the comprehensive recovery of nonmetallic minerals. In the novel flowsheet, the sample is ground to size of P80 = 74 m then fed into a combination of a low-intensity wet drum magnetic separator and pulsating high-gradient magnetic separator to reject nonmagnetic gangue minerals while preconcentrating the paramagnetic columbitetantalite; the high-gradient magnetic separation concentrates were screened into three size fractions and further upgraded by gravity concentration. The enrichment ratios for Ta2O5 and Nb2O5 were 403.8 and 385.6, respectively.
F. Melcher, T. Graupner, H.E. Gbler, M. Sitnikova, F. Henjes-Kunst, T. Oberthr, A. Gerdes, and S. Dewaele, F. Melcher, T. Graupner, H.E. Gbler, M. Sitnikova, F. Henjes-Kunst, T. Oberthr, A. Gerdes, and S. Dewaele, Ore Geol. Rev. 64, 667 (2015).
This study was financially supported by the Research Fund Program of State Key Laboratory of Rare Metals Separation and Comprehensive Utilization (Project No. GK201903), the Department of Science and Technology of Guangdong Province, China (Project No. 2017GDASCX-0301), and the Fundamental Research Funds for the Central Universities of Central South University (Project No. 2019zzts313).
a mixed collector system for columbite-tantalite flotation - sciencedirect
BHA-SIBX mixture was introduced as a mixed collector in columbitetantalite flotation.BHA-SIBX mixture displayed superior flotation performances than single BHA.BHA-SIBX mixture was a promising collector for fine columbitetantalite flotation.
Effective collector is essential in columbite-tantalite flotation from gravity tailings, as well as in the sustainable utilisation of TaNb resources. In this study, benzohydroxamic acid (BHA) and sodium isobutyl xanthate (SIBX) were introduced as a mixed collector system to improve the flotation of columbitetantalite at reduced cost. An increase in columbite-tantalite recovery was observed in the presence of BHASIBX mixtures relative to those with BHA alone. The 3:1 BHASIBX mixture exhibited the highest columbite-tantalite recovery. The synergistic enhancement of the flotation performance was attributed to the improved adsorption of the BHASIBX mixture on the columbite-tantalite surface compared to that on BHA alone. Batch flotation tests of real ore showed that, compared with BHA (600 g/t), a smaller amount of the BHASIBX mixture (400 g/t) was needed to achieve better Ta2O5 recovery. Additionally, an economic evaluation confirmed the economic efficiency of recovering fine columbite-tantalite from gravity tailings using the mixed BHASIBX collector.