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LOWER GRADE ORE [1 record]

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Record 1 1991-09-24

English

Subject field(s)
  • Metals Mining
CONT

The tendency with many metals during this century has been to mine lower and lower grade ores.

CONT

Ore grades are somewhat variable. The lowest grade of working deposit in western countries appears to be ... [a] mine working 0.2% Ni ore. This low grade can be compared with the very high grade sections of some Western Australian deposits that run about 12% Ni. Of course, the overall grade for Australian deposits is less than this because lower grade ore is mined with these high grades.

French

Domaine(s)
  • Mines métalliques
CONT

(...) la découverte d'un nouveau procédé de traitement permettra d'extraire des minerais à teneur plus faible (...)

Spanish

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