TERMIUM Plus^®

Record 1,  Textual support,  English

Record number: 1, Textual support number: 1 DEF

A solution in hydrometallurgical treatment from which all possible valuable constituents have been removed.  4, record 1, English, - barren%20leach%20solution

Record number: 1, Textual support number: 1 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).  1, record 1, English, - barren%20leach%20solution

Record 1,  Textual support,  French

Record number: 1, Textual support number: 1 DEF

Dans un procédé de lixiviation, solution à partir de laquelle les métaux dissous ont été extraits.  2, record 1, French, - solution%20st%C3%A9rile

Record 1,  Textual support,  Spanish

Record 2,  Textual support,  English

Record number: 2, Textual support number: 1 CONT

After crushing and grinding, gold recovery could be completed using a combination of flotation, oxidation, and leaching processes. The optimal process and combination needs to be evaluated with pre-feasibility studies and engineering. The leach circuit could be either carbon-in-pulp(CIP) or carbon-in-leach(CIL) followed by an adsorption-desorption-recovery(ADR) plant to generate a gold bullion product.  1, record 2, English, - adsorption%2Ddesorption%2Drecovery%20plant

Record 2,  Textual support,  French

Record 2,  Textual support,  Spanish

Record 3,  Textual support,  English

Record number: 3, Textual support number: 1 DEF

Vigorous stirring of pulp in a tank by low-pressure air or mechanical means to prevent settlement.  4, record 3, English, - agitation

Record number: 3, Textual support number: 1 OBS

Also used in the leaching of gold and other minerals from finely ground aqueous suspension in which oxygen is essential to chemical reaction, for example, the cyanide process.  4, record 3, English, - agitation

Record 3,  Textual support,  French

Record number: 3, Textual support number: 1 DEF

Agitation d'un ensemble de liquides ou de solides fragmentés, ou d'une pulpe, ayant pour objet, soit de favoriser les contacts entre les constituants, soit de doter l'ensemble d'homogénéité de distribution.  4, record 3, French, - brassage

Record 3,  Textual support,  Spanish

Record 4,  Textual support,  English

Record number: 4, Textual support number: 1 DEF

A chemical compound which appears under the form of colored crystals and which is used in organic synthesis and as leaching agent for gold.  4, record 4, English, - propanedinitrile

Record number: 4, Textual support number: 1 OBS

malononitrile: part of the Ingredient Disclosure List of the Hazardous Products Act (Registration SOR/88-64, December 31, 1987).  4, record 4, English, - propanedinitrile

Record number: 4, Textual support number: 2 OBS

Also known under the following commercial designations: RCRA waste number U149; UN 2647; USAF A-4600; USAF KF-19.  4, record 4, English, - propanedinitrile

Record number: 4, Textual support number: 3 OBS

Chemical formula: CH₂(CN)₂ or C₃H₂N₂  4, record 4, English, - propanedinitrile

Record 4,  Textual support,  French

Record number: 4, Textual support number: 1 OBS

malononitrile : fait partie de la Liste de divulgation des ingrédients de la Loi sur les produits dangereux (du Canada; enr. DORS s/88-64, 31 déc. 1987).  4, record 4, French, - propanedinitrile

Record number: 4, Textual support number: 2 OBS

Formule chimique : CH₂(CN)₂ ou C₃H₂N₂  4, record 4, French, - propanedinitrile

Record 4,  Textual support,  Spanish

Record 5,  Textual support,  English

Record number: 5, Textual support number: 1 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.  3, record 5, English, - leach%20pad

Record number: 5, Textual support number: 2 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.  4, record 5, English, - leach%20pad

Record number: 5, Textual support number: 3 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.  5, record 5, English, - leach%20pad

Record 5,  Textual support,  French

Record number: 5, Textual support number: 1 CONT

Remblai de lixiviation profonde par cyanuration de la Goldfields Ghana Ltée [...]  1, record 5, French, - remblai%20de%20lixiviation

Record number: 5, Textual support number: 1 OBS

remblai : Masse de matière rapportée pour élever un terrain ou combler un creux. [...] Les remblais s'exécutent par couches successives.  3, record 5, French, - remblai%20de%20lixiviation

Record 5,  Textual support,  Spanish

Record 6,  Textual support,  English

Record number: 6, Textual support number: 1 CONT

This also regards plastic sheets, which are applicable to extensive lixiviation(or leaching) pads(in both, copper and gold mining).  1, record 6, English, - extensive%20lixiviation%20pad

Record 6,  Textual support,  French

Record number: 6, Textual support number: 1 CONT

Remblai de lixiviation profonde par cyanuration de la Goldfields Ghana Ltée [...]  1, record 6, French, - remblai%20de%20lixiviation%20profonde

Record 6,  Textual support,  Spanish

Record 7,  Textual support,  English

Record number: 7, Textual support number: 1 CONT

Most gold and silver mines in Canada prior to 1900 used the mercury amalgam process to separate gold or silver from the ore. An estimated 513 such mines existed in Canada at the turn of the century. Extensive leaching of mercury from tailings from these mines could occur and enter neighbouring water systems producing considerable elevation of the mercury levels in the aquatic ecosystem.  4, record 7, English, - extensive%20lixiviation

Record 7,  Textual support,  French

Record number: 7, Textual support number: 1 CONT

Altération et lessivage profond dans la Craie du sud-est du bassin de Paris.  1, record 7, French, - lessivage%20profond

Record number: 7, Textual support number: 2 CONT

Remblai de lixiviation profonde par cyanuration de la Goldields Ghana Ltée [...]  2, record 7, French, - lessivage%20profond

Record 7,  Textual support,  Spanish