Characterization and Breakdown of South Gabal EL A’urf Polymineralized ore Material

El-Hazek, M.N.; Amer, T.E.; Issa, R. M.; El-Azm, M.G. Abu; Omar, Sayed; El-Hady, S.M.

doi:10.18321/ectj309

Cited by 10 publications

(3 citation statements)

References 7 publications

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“…However, alkali roast and leach dissolution method employing KOH roasting and H 2 O leaching on a low-grade Nb-Ta mineral ore has had great recoveries [44,47]. KHSO 4 fusion as a pyrometallurgical process to improve the subsequent leaching efficiency of a low grade Nb/Ta polymineralized ore has also been adopted [62]. The study reported the feasibility of Ta/Nb decomposition and leach recovery efficiencies of alkali dissolution process on low-grade minerals.…”

Section: Literature Overview Of the Pyro-hydrometallurgical Recovery ...mentioning

confidence: 99%

Pyrometallurgical Approach in the Recovery of Niobium and Tantalum

Nzeh¹,

Mokgalaka²,

Maila³

et al. 2024

Extraction Metallurgy - New Perspectives

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The pyrometallurgical methods of the recovery of various critical metals have been established. Certain pyrometallurgical approaches for niobium (Nb) and tantalum (Ta) extraction have been studied and investigated by several researchers. For instance, the conventional reduction of Nb mineral or Nb2O5 to Nb metal has been conducted over the decades. Albeit, the success level of this process, it however involves the consumption of lots of energy, high cost of equipment/equipment maintenance, somewhat low Nb and Ta recovery and limited effectiveness on low grade minerals; and thus, considered cost intensive and inefficient. In addition, the inadequacies of pyrometallurgical extraction of these metals from their complex, low grade mineral ores due to its difficulty and large energy requirement in melting the elemental impurities and gangue minerals have been a major concern. On this premise therefore, the study will provide insights into recent pyrometallurgical techniques of Nb and Ta extraction as well as associated factors and challenges.

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Section: Literature Overview Of the Pyro-hydrometallurgical Recovery ...mentioning

confidence: 99%

Pyrometallurgical Approach in the Recovery of Niobium and Tantalum

Nzeh¹,

Mokgalaka²,

Maila³

et al. 2024

Extraction Metallurgy - New Perspectives

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“…Using H 2 SO 4 /HNO 3 acid mixture agitation leaching, almost complete dissolution of Nb and Ta was achieved together with 86% of Th and 70% of the REE; however, U and Ti leaching efficiencies did not exceed 60%. On the other hand, El Hazek et al [10] have applied different breakdown techniques including agitation with conc. H 2 SO 4 and potassium bisulfate fusion upon a polymineralized material to dissolve its metal values.…”

Section: Introductionmentioning

confidence: 99%

Potash Breakdown of Poly-Mineralized Niobium-Tantalum-Lanthanides Ore Material

Hazek¹,

Mohamed²,

Gabr³

2019

AJAC

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The potentiality of the alkali breakdown of the poly mineralized ore material south Gabal El-A'urf area, central Eastern Desert, Egypt is investigated. It includes the multiple oxide mineral tanteuxenite, monazite, bastnasite, anatase, as well as zircon. This ore material assaying lanthanides (RE 2 O 3 1.9%), niobium (Nb 2 O 5 1.25%) as well as titanium and zirconium (TiO 2 and ZrO 2 1.23% and 1.12%) respectively besides tantalum (Ta 2 O 5 0.13%), were used for the present work. This sample has thus been subjected to two alkali breakdown techniques using potash; namely agitation leaching and fusion. The latter technique was found to be preferred as it gives higher leaching efficiency. The optimum leaching conditions are weight ratio of the ore/potassium hydroxide 1/2 at 400˚C for 1 h. The realized leaching efficiencies attained 95.0% and 93.7% for Nb and Ta respectively as well as 96% for lanthanides and 75% for Ti while that for Zr did not exceed 10%.

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“…Through the investigation of effect factors, the optimum conditions were obtained and the leaching recoveries of niobium and tantalum were about 94.7 % and 93.6 %, respectively. Also, some other methods, i.e., KHSO 4 roasting [22], were also developed to enhance the leaching of Nb and other metals. For example, El-Hazek et al [22], studied the recovery of Nb and other valuable metals from polymineralized ore material of (containing 1.25 wt% Nb 2 O 5 , 0.19 wt% Ta 2 O 5 ) south Gabal El-A'urf area in Egypt using potassium bisulfate fusion, and they realized a high dissolution efficiencies for Nb of 98.0 %, Ta of 99.3 % and rare earth metals of 100 %, respectively.…”

Section: Introductionmentioning

confidence: 99%

Extraction of niobium, yttrium, and cerium from a low-grade niobium-bearing ore by roasting (NH4)2SO4-Na2SO4-H2SO4 system

Gao

Wen

et al. 2014

Rare Met.

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A novel process of extracting niobium, yttrium, and cerium from a low-grade niobium-bearing ore by the roasting (NH 4 ) 2 SO 4 -Na 2 SO 4 -H 2 SO 4 system was experimentally studied. The influences of various factors, such as roasting temperature, roasting time, mass ratio of agents-to-ore and particle size fraction on the extraction of valuable metals were comprehensively investigated. It is found that the roasting Na 2 SO 4 -H 2 SO 4 system is effective to extract the niobium, yttrium, and cerium. The obtained optimum conditions for the extraction of Nb, Y, and Ce are roasting temperature of 300°C, roasting time of 3 h, mass ratio of Na 2 SO 4 :H 2 SO 4 :Ore of 0.5:1.0:1.0, and particle size fraction of -74 lm (*95 %). Under the optimum condition, the maximum recovery of Nb, Y, and Ce can reach 90.53 %, 92.15 %, and 98.04 %, respectively. All the results generated from this study will provide the fundamentals for Nb, Y, and Ce extraction from a niobiumbearing ore with low-grade.

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Characterization and Breakdown of South Gabal EL A’urf Polymineralized ore Material

Cited by 10 publications

References 7 publications

Pyrometallurgical Approach in the Recovery of Niobium and Tantalum

Pyrometallurgical Approach in the Recovery of Niobium and Tantalum

Potash Breakdown of Poly-Mineralized Niobium-Tantalum-Lanthanides Ore Material

Extraction of niobium, yttrium, and cerium from a low-grade niobium-bearing ore by roasting (NH4)2SO4-Na2SO4-H2SO4 system

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