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HEAP LEACHING [7 records]

Filter results by subject field Alphabetical list of terms

Filter results by subject field

Alphabetical list of terms

Record 1 2026-02-05

English

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

A solution in hydrometallurgical treatment from which all possible valuable constituents have been removed.

CONT

Heap leaching is often the most cost-effective way to extract value from gold or copper ores. Heap leaching involves placing ore-grade material on an impermeable liner foundation with a solution collection system of drainpipes and irrigating the surface with either cyanide solution(for gold) or acid(for copper). Within the heap, chemical reactions occur which liberate the payable metal from the rock. The resultant solution, called pregnant leach solution(PLS), reaches the liner and the collection pipes, and then reports to a storage facility(pond) for processing where the metal is removed, the solution conditioned, and re-applied to the HLP [heap leach pad] as barren leach solution(BLS).

French

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

Dans un procédé de lixiviation, solution à partir de laquelle les métaux dissous ont été extraits.

Spanish

Campo(s) temático(s)
  • Preparación de los productos mineros
  • Explotación de minerales (Metalurgia)
Save record 1

Record 2 2013-11-19

English

Subject field(s)
  • Processing of Mineral Products
DEF

A process whereby gold is extracted by heaping broken ore on sloping impermeable pads and continually applying to the heaps a weak cyanide solution which dissolves the contained gold.

OBS

The gold-laden solution is then collected for gold recovery.

French

Domaine(s)
  • Préparation des produits miniers
DEF

Procédé d'extraction de l'or où le minerai concassé est posé sur une cellule imperméable légèrement inclinée et est lessivé de façon continue par une solution diluée de cyanure qui dissout l'or contenu [...]

OBS

[...] la solution enrichie en or est ensuite recueillie et l'or, récupéré.

Spanish

Save record 2

Record 3 - external organization data 2006-01-10

English

Subject field(s)
  • Mineral Processing (Metallurgy)
  • Chemical Engineering
  • Nuclear Science and Technology
  • Compartment - Canadian Nuclear Safety Commission
DEF

A process used for the recovery of copper from weathered ore and material from mine dumps [in which] the material is laid in beds alternately fine and coarse until the thickness is roughly twenty feet.

OBS

[This material] is treated with water or the spent liquor from a previous operation. ... The liquor seeping through the beds is led to tanks ...

OBS

Heap leaching is applied to ores where the grade is too low to carry the cost of haulage and processing in a conventional concentrating or vat-leaching operation.

French

Domaine(s)
  • Minéralurgie (Métallurgie)
  • Génie chimique
  • Sciences et techniques nucléaires
  • Tiroir - Commission canadienne de sûreté nucléaire
DEF

Lixiviation d'un matériau disposé en tas que l'on arrose avec une solution d'attaque.

CONT

La lixiviation en tas consiste à arroser le minerai broyé à une granulométrie facilitant l'attaque d'un produit chimique capable de dissoudre de façon sélective le métal recherché. La solution résultante est récupérée après filtration, puis raffinée pour en retirer le métal pur.

CONT

[Les stériles] peuvent être utilisés de différentes manières, mais leurs caractéristiques minéralogiques, leur radioactivité et leur réactivité chimique doivent être évaluées avant de décider de les affecter à l'une des utilisations suivantes : - récupération d'uranium par lixiviation en tas, donc extraction poussée [...]

OBS

On extrait ainsi l'uranium de minerais pauvres en l'arrosant d'acide sulfurique.

Spanish

Campo(s) temático(s)
  • Explotación de minerales (Metalurgia)
  • Ingenieria química
  • Ciencia y tecnología nucleares
  • Compartimiento - Comisión Canadiense de Seguridad Nuclear
Save record 3

Record 4 2002-04-08

English

Subject field(s)
  • Geochemistry
  • Processing of Mineral Products
CONT

Leach pads have a foundation of impermeable clay overlaid with a tough plastic liner covered by protective layers of sand and gravel. Large ore heaps are built on these pads.

CONT

Heap leaching is a relatively simple process where low grade ores are stacked on a leach pad and then treated with a solution to recover precious values such as gold, silver, and copper metals.

CONT

The pit will be partially, but not fully, backfilled. Over in Powers Gulch, the leaching pad will contain spent ore that cannot be neutralized.

French

Domaine(s)
  • Géochimie
  • Préparation des produits miniers
CONT

Remblai de lixiviation profonde par cyanuration de la Goldfields Ghana Ltée [...]

OBS

remblai : Masse de matière rapportée pour élever un terrain ou combler un creux. [...] Les remblais s'exécutent par couches successives.

Spanish

Save record 4

Record 5 - external organization data 1994-11-08

English

Subject field(s)
  • Underground Mining
  • Compartment - Canadian Nuclear Safety Commission
CONT

If solution mining or heap leaching is proposed, the physical, chemical and radiological characteristics and the expected daily volume of the solution to be used.

French

Domaine(s)
  • Exploitation minière souterraine
  • Tiroir - Commission canadienne de sûreté nucléaire
CONT

Si la méthode d'extraction par solution ou de lixiviation en tas est proposée, les caractéristiques physiques, chimiques et radiologiques, ainsi que le volume quotidien prévu de la solution à utiliser.

Spanish

Save record 5

Record 6 1992-11-09

English

Subject field(s)
  • Water Treatment (Water Supply)

French

Domaine(s)
  • Traitement des eaux

Spanish

Save record 6

Record 7 1986-11-12

English

Subject field(s)
  • Metals Mining
CONT

Although heap leaching is widely practiced, it is not entirely suited to Canadian climatic conditions; however, important advances are being made in the technology to harness bacterial leaching to provide an economically viable biohydrometallurgical process to extract and recover secondary metal values from sulphide ores....

French

Domaine(s)
  • Mines métalliques
CONT

La lixiviation en tas est un procédé très répandu, mais elle n'est pas entièrement adaptée aux conditions climatiques canadiennes. Cependant, des progrès technologiques importants sont réalisés dans l'application de la lixiviation bactérienne à un procédé biohydrométallurgique rentable pour l'extraction des métaux secondaires dans les minerais sulfurés (...)

Spanish

Save record 7

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