Rainbow Rare Earths (LSE: RBW)
Published a Technical Report on the Phalaborwa Processing Flow Sheet Development.
Rainbow initiated a phased test work programme at ANSTO Minerals in Sydney, Australia to develop
a feasible, rare earth extraction, flowsheet for processing the phosphogypsum deposit located
at Phalaborwa, South Africa.
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| Rainbow Rare Earths | LSE: RBW |
| Stage | Exploration, development |
| Metals | Rare Earth Elements |
| Market cap | £95 m @ 15.75p |
| Location | South Africa, Burundi |
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Rainbow initiated a phased test work programme at ANSTO Minerals in Sydney, Australia to develop
a feasible, rare earth extraction, flowsheet for processing the phosphogypsum (“PG”) deposit located
at Phalaborwa, South Africa.
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The ANSTO Minerals test work programme was supported by various other studies and test campaigns
at various facilities.
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The key programs can be summarised as follows:
• Filtration test work at Roytec Global in Johannesburg, South Africa
• Nano filtration desktop study at Chimerical in Cape Town, South Africa
• Site water analysis and basic neutralisation testing at SGS Johannesburg, South Africa
• K–Tech rare earth purification and separation desktop study carried out in Florida, USA.
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The initial test work programme, at ANSTO Minerals, has been designed as a two phased programme
with the phase 1 programme completed July 2021.
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The phase 1 programme covered the following milestones:
• Material characterisation and mineralogy
• Radiological classification
• Leach conditions and lixiviant selection
• Resin in leach evaluation
• Preliminary metallurgical variability response
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Rainbow Rare Earths company profile
Rainbow Rare Earths has two major opportunities in Africa: the Phalaborwa Project in South Africa and the high-grade Gakara Project in Burundi, East Africa.
Rainbow’s strategy is to become a globally-significant producer of rare earth metals.
Phalaborwa comprises an Inferred Mineral Resource Estimate of 38.3Mt at 0.43% TREO contained within gypsum tailings stacked in unconsolidated dumps derived from historic phosphate hard rock mining. High value NdPr (Neodymium and Praseodymium) oxide represent 29.1% of the total contained rare earth oxides, with economic Dysprosium and Terbium oxide credits enhancing the overall value of the rare earth basket contained in the stacks.
Gakara has produced one of the highest-grade concentrates in the world through trial mining operations, with its basket weighted heavily towards NdPr (Neodymium and Praseodymium), which account for over approximately 19.5% of the contained TREO and 85% of the value of the concentrate.
