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Filter results by subject field Alphabetical list of terms

Filter results by subject field

Alphabetical list of terms

Record 1 2005-11-03

English

Subject field(s)
  • Mineral Processing (Metallurgy)
  • Processing of Mineral Products
  • Chemical Engineering
DEF

Dissolving soluble minerals or metals out of the ore, as by the use of percolating solutions such as cyanide or chlorine solutions, acids, or water.

CONT

Leaching processes fall into two principal classes: those in which the leaching is accomplished by percolation (seeping of solvent through a bed of solids), and those in which particulate solids are dispersed into the extracting liquid and subsequently separated from it.

OBS

Leaching ... originally referred to percolation of liquid through a fixed bed, but now it is also used to mean solid-liquid extraction generally.

French

Domaine(s)
  • Minéralurgie (Métallurgie)
  • Préparation des produits miniers
  • Génie chimique
DEF

Méthode de traitement des minerais faisant appel à une attaque chimique et une dissolution de certains constituants.

OBS

On utilise par exemple le cyanure pour dissoudre l'or et l'argent contenus dans un minerai suffisamment broyé.

OBS

Pour certains auteurs, le lessivage est une lixiviation naturelle.

Spanish

Campo(s) temático(s)
  • Explotación de minerales (Metalurgia)
  • Preparación de los productos mineros
  • Ingenieria química
CONT

Ciertos yacimientos de minerales solubles pueden beneficiarse por lixiviación desde el exterior, reduciéndose entonces las labores a la perforación de pozos de sonda, algunos de los cuales sirven para inyectar un fluido disolvente, mientras que por otros sale el mismo cargado de sustancia mineral que ha disuelto en el fondo. Este método se aplica sobre todo para beneficiar la sal gema, disolviéndola en el fondo con agua, y el azufre, cuyo solvente es el vapor de agua.

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