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Fiche 1,  Justifications,  Anglais

Record number: 1, Textual support number: 1 CONT

The proportional amounts of uranium, arsenic, copper, cobalt, nickel, and bismuth in gravity concentrates from the Eldorado mine ores were, according to four-year records, approximately 20:13:7:7:4:1 ...  1, fiche 1, Anglais, - gravity%20concentrate

Fiche 1,  Justifications,  Français

Record number: 1, Textual support number: 1 CONT

Les proportions d'uranium, d'arsenic, de cuivre, de cobalt, de nickel et de bismuth dans les concentrés gravimétriques du minerai de la mine Eldorado étaient, selon des registres quadriennaux, d'environ 20/13/7/7/4/1 respectivement [...]  1, fiche 1, Français, - concentr%C3%A9%20gravim%C3%A9trique

Fiche 1,  Justifications,  Espagnol

Fiche 2,  Justifications,  Anglais

Record number: 2, Textual support number: 1 DEF

The intentional raising as a mineralized froth of more than one mineral in one operation.  4, fiche 2, Anglais, - bulk%20flotation

Record number: 2, Textual support number: 1 CONT

Froth flotation was first used to recover sulfide minerals which were too fine to be recovered by gravity concentrators such as jigs, tables, and sluices. These early operations removed all of the sulfide minerals into one concentrate. Although good recoveries were achieved by this bulk flotation, the concentrate grades were poor. As the understanding of the chemistry of flotation improved, better reagents became available and differential flotation became a reality. It became possible, in many cases, to float only the valuable sulfide minerals and leave the unwanted pyrite(fool' s gold) with the gangue.  5, fiche 2, Anglais, - bulk%20flotation

Fiche 2,  Justifications,  Français

Record number: 2, Textual support number: 1 DEF

Flottation au cours de laquelle on recueille dans un même produit plusieurs minéraux de valeur.  3, fiche 2, Français, - flottation%20collective

Fiche 2,  Justifications,  Espagnol