Processing of the mineralized Black Mica for the recovery of uranium, rare earth elements, niobium, and tantalum

Ibrahim, M. M.; Orabi, Ahmed H.; Falila, Nagwa Ibrahim; Ismaiel, Doaa A.; Salem, Hend

doi:10.1016/j.hydromet.2020.105474

Cited by 14 publications

(14 citation statements)

References 15 publications

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“…The pulp with a solids percentage of 65 % presented better results in the metallurgical recovery than the pulp with 45 % of solids. This contrasts with what is generally observed, that is, the lowest percentages are linked to better leaching results and, consequently, to better metallurgical recoveries [6,7,8].…”

Section: Leaching Results -Chemical Analysis Of the Solid And Metallu...contrasting

confidence: 58%

Study of aluminothermic slag leaching for uranium and thorium recovery

MOURA

Santos²,

Pereira³

2022

Braz. J. Rad. Sci.

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The need for energy by modern society is increasing. On the other hand, it is necessary to reduce costs and environmental impact. In this perspective, the recovery of uranium present in industrial waste from the processing of naturally occurring radioactive material (NORM) appears as a possible complement to the mining stage of the Nuclear Fuel Cycle. NORM's uranium recovery can reduce environmental liabilities and mineral processing costs (especially blasting, crushing, and grinding). The industrial residue of this study, a type of aluminothermic slag, comes from the metallurgical processing of columbite (niobium and tantalum mineral) and has a content, measured by X-ray fluorescence, of 1.78% of U3O8. This content is higher, for example than those found in Lagoa Real-BA (0.2% in rock) and Santa Quitéria-CE (0.1% in rock). Another material that will be studied is ThO2, which is also present in the slag with a content, measured by X-ray fluorescence, around 3.66%. The process parameters analyzed were pH of the solution, time, granulometry and percentage of solids. The metallurgical recovery of U3O8 reached a maximum value of 71,3% with pH = 1, time of 8 hours, 65 % percentage of solids, and 200 µm of granulometry. The metallurgical recovery of ThO2 reached a maximum value of 69,7% with pH = 1, time of 8 hours, 65 % percentage of solids, and 200 µm of granulometry.

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Section: Leaching Results -Chemical Analysis Of the Solid And Metallu...contrasting

confidence: 58%

Study of aluminothermic slag leaching for uranium and thorium recovery

MOURA

Santos²,

Pereira³

2022

Braz. J. Rad. Sci.

View full text Add to dashboard Cite

show abstract

“…[ 21 ] In 2010, the world storage of Ta 2 O 5 was around 318 000 t. [ 16 ] Besides, other minerals were investigated as Nb and Ta assets, such as black mica, plumbomicrolite, and a mineral from Panxi, China. [ 22–24 ]…”

Section: Niobium and Tantalum Resourcesmentioning

confidence: 99%

“…Black mica's initial composition was 50 750 mg/kg of Nb 2 O 5 and 5000 mg/kg of Ta 2 O 5 , with 55.60% SiO 2 , 11.40% Al 2 O 3 , and 11.50% Fe 2 O 3 , and the radionuclides composition was 1680 mg/kg of U 3 O 8 and 260 mg/kg of Th. [ 22 ]…”

Section: Niobium and Tantalum Resourcesmentioning

confidence: 99%

“…Although this flux is less corrosive and more environmentally friendly when compared with the fluoride process, it requires higher energy consumption once the working fusion temperature is higher. [ 21 ] A similar process was done by Ibrahim et al [ 22 ] for black mica treatment. Firstly, they leached black mica with 8% H 2 SO 4 , 1:4 S/L ratio, at room temperature for 4 h to remove 92% of the U content.…”

Section: Niobium and Tantalum Extractionmentioning

confidence: 99%

“…In this, liquor Nb and Ta could be separated by solvent extraction employing lauryl alcohol in kerosene (to remove REE), and ammonia is employed as a precipitation agent. [ 22 ] The final product after extraction may be niobium precipitate, and finally calcination occurs to obtain niobium oxide.…”

Section: Nb and Ta Separationmentioning

confidence: 99%

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