Chemistry of inorganic compounds – Treating mixture to obtain metal containing compound – Group vb metal
Patent
1988-05-19
1990-05-08
Stoll, Robert L.
Chemistry of inorganic compounds
Treating mixture to obtain metal containing compound
Group vb metal
423492, 423490, 423489, 423 84, 423 72, 423 63, C22B 100
Patent
active
049235079
ABSTRACT:
The subject of the invention is a process for opening ores, particularly ores containing tantalum, niobium, zirconium and titanium, of the kind that includes the stages of leaching with mineral acids, solvent extraction, purification and separation of the products obtained, characterized by the fact that initially, instead of leaching with sulfuric acid and hydrofluoric acid being performed as a first stage, the original ore concentrate is melted together with fluorite (CaF.sub.2), followed by milling of the melting product obtained and subsequently leaching with concentrated sulfuric acid, followed by extraction of the soluble species using solvents, separation and purification of the products obtained.
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Harvey Paige C.
Mamore Mineracao E Metalurgia S/A
Stoll Robert L.
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