Niobium oxide mineral flotation: A review of relevant literature and the current state of industrial operations

Gibson, Charlotte E.; Kelebek, Ş.; Aghamirian, M.

doi:10.1016/j.minpro.2015.02.005

Cited by 58 publications

(24 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…While niobium oxide can be economically extracted from the deposit of pyrochlore and columbite, which can generally be divided into two types, namely: primary carbonatite deposits with contain of 0.5-0.7% Nb 2 O 5 and enriched pegmatite deposits (carbonite mineral leaching products of primary carbonatite) that contains of 1.0-7.0% Nb 2 O 5 [5].…”

Section: Introductionmentioning

confidence: 99%

Other Oxides Pre-removed from Bangka Tin Slag to Produce a High Grade Tantalum and Niobium Oxides Concentrate

Permana

Soedarsono

Rustandi

et al. 2016

IOP Conf. Ser.: Mater. Sci. Eng.

View full text Add to dashboard Cite

Abstract. Indonesia, as the second largest tin producer in the world, has a byproduct from the production of tin. This byproduct is in the forms of tin slag containing tantalum pentoxide (Ta 2 O 5 ) and niobium pentoxide (Nb 2 O 5 ). This study focuses on the recovery of tantalum pentoxide and niobium pentoxide from the tin slag. In the process, one part of the tin slag sample was sieved only (BTS), and the other was roasted at 900°C, water quenched and then sieved (BTS-RQS). Samples BTS and BTS-RQS were characterized by thermo gravimetric analysis (TGA) and X-ray flourence (XRF). One part of BTS-RQS sample was dissolved in hydrofluoric acid (HF) and the other was dissolved in hydrochloric acid (HCl), washed with distilled water, then dissolved into sodium hydroxide (NaOH). Each sample was characterized by using XRF. The BTS sample produced the highest recovery of 0.3807 and 0.6978 % for Ta 2 O 5 and Nb 2 O 5 , respectively, from the particle size of -1.00+0.71 and a fraction of 47.29%, while BTS-RQS produced the highest recovery of 0.3931 and 0.8994 % for Ta 2 O 5 and Nb 2 O 5 , respectively, on the particle size of -0.71+0350 and a fraction of 21%. BTS-RQS, dissolved with 8% hydro fluoride acid, yields tantalum pentoxide and niobium pentoxide with a ratio of 2.01 and 2.09, respectively. For the sample BTS-RQS dissolve first with 6M hydrochloric acid, washed with distilled water, then dissolved with sodium hydroxide 10M, the yield ratios are 1.60 and 1.84 for tantalum pentoxide and niobium pentoxide, respectively. In this study, it is found that the dissolution by using hydrofluoric acid 8% yields the best ratio.

show abstract

Section: Introductionmentioning

confidence: 99%

Other Oxides Pre-removed from Bangka Tin Slag to Produce a High Grade Tantalum and Niobium Oxides Concentrate

Permana

Soedarsono

Rustandi

et al. 2016

IOP Conf. Ser.: Mater. Sci. Eng.

View full text Add to dashboard Cite

show abstract

“…Figure 8 exhibits the correlation between the slag mass loss and the content of Nb 2 O 5 and Ta 2 O 5 in the final leach residue. The most favorable leaching conditions for an Acid-Basic-Acid sequence led to a 75 % mass loss and to the production of a 63.3 weight % of (Ta+Nb) 2 O 5 concentrate, which is comparable to the grade of commercial concentrates obtained from their primary mineral sources (Simandl, 2001;Gibson, Kelebek and Aghamirian, 2015). sample.…”

Section: Resultsmentioning

confidence: 82%

Development of a process for the concentration of the strategic tantalum and niobium oxides from tin slags

Allain

Kanari

Diot

et al. 2019

Minerals Engineering

View full text Add to dashboard Cite

The extraction of tin through smelting of cassiterite (SnO 2) has generated considerable amounts of slag in the main production areas of SouthEast Asia, Africa, and South America. Tantalum and niobium naturally occur in cassiterite deposits and are concentrated in the slag during the smelting process. Tin slags have often been disposed as industrial waste despite contents of tantalum and niobium ranging from 2 to 25 %. Conventional hydrometallurgical processes for the concentration of tantalum and niobium oxides utilizing high concentration of strong acids such as HF or H 2 SO 4 are environmentally and economically challenging. This paper describes an original and greener approach for the selective dissolution of the slag amorphous matrix, and the concentration of tantalum and niobium oxides in a solid residue. Starting from a slag containing about 15 % (Ta,Nb) 2 O 5 , sequential alkaline and acid leaching stages resulted in the production of a 63 % (Ta + Nb) oxides concentrate, which is comparable to commercial grade of mineral concentrates.

show abstract

“…At the initial stage of the roasting process, REE-Fe-Nb ore particles contacted with graphite particles directly. So iron oxides were reduced by carbon, shown as Equations (1)- (3). With the generation of CO, iron oxide can be further reduced by CO which is shown as Equations (4)- (6).…”

Section: Reduction Degree At Different Temperaturementioning

confidence: 99%

“…For example, the grade of Nb 2 O 5 was enhanced from 0.14 wt % to ≥3 wt % using a combined dressing process including forth flotation and magnetic separation. However, the grade of REE-Nb-Fe ore beneficiated from the tailings could still not meet the requirements of the Nb industry and REE industry [3]. To separate and recover valuable metals from the low-grade REE-Nb-Fe ore, a process comprising of reduction roasting, magnetic separation, and sulfuric acid (H 2 SO 4 ) leaching was proposed in our previous investigation [4].…”

Section: Introductionmentioning

confidence: 99%

Reduction Characteristics of Carbon-Containing REE–Nb–Fe Ore Pellets

Zhang

Fan

Liu

et al. 2018

Metals

View full text Add to dashboard Cite

Abstract:To separate and recover the valuable metals from low-grade REE (rare earth elements)-Nb-Fe ore in China, the reduction characteristics of carbon-containing REE-Nb-Fe ore pellets, including mineral phase variation, reduction degree, and reaction kinetics, were observed based on thermogravimetry experiments. The results showed that the reduction and separation efficiency of valuable metals in the carbon-containing pellets were superior to the ones in the previous non-compact mixture. After the reduction roasting of the pellets at 1100 • C and a subsequent magnetic separation, the iron powder with a grade of 91.7 wt % was separated, and in magnetic separation tailings the grades of Nb 2 O 5 and (REE)O were beneficiated to approximately twice the grades in the REE-Nb-Fe ore. The reaction rate of the reduction of the carbon-containing pellets was jointly controlled by the carbon gasification reaction and the diffusion of CO in the product layer with an activation energy of 139.26-152.40 kJ·mol −1 . Corresponding measures were proposed to further improve the kinetics condition.

show abstract

Niobium oxide mineral flotation: A review of relevant literature and the current state of industrial operations

Cited by 58 publications

References 19 publications

Other Oxides Pre-removed from Bangka Tin Slag to Produce a High Grade Tantalum and Niobium Oxides Concentrate

Other Oxides Pre-removed from Bangka Tin Slag to Produce a High Grade Tantalum and Niobium Oxides Concentrate

Development of a process for the concentration of the strategic tantalum and niobium oxides from tin slags

Reduction Characteristics of Carbon-Containing REE–Nb–Fe Ore Pellets

Contact Info

Product

Resources

About