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- Extractive metallurgy of euxenite
- Extraction of zirconium from Nigerian high-hafnium concentrate
- Separation of tantalum from columbium by the hydrofluoric acid-sulfuric acid-methyl isobutyl ketone system
- Extraction of tantalum and columbium from ores and concentrates by chlorination
- Copper cementation using automobile scrap in a rotating drum