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Basic Technical IVT

Heap Leaching Pad Decommissioning

noun

Pronunciation: /hiːp ˈliːtʃɪŋ pæd dɪˌkɑmɪˈʃənɪŋ/

The process of safely closing and remediating engineered pads where crushed ore was stacked and chemically treated to extract minerals, including removal of residual chemicals and stabilization of remaining material. This involves containment system removal, chemical neutralization, and long-term environmental monitoring.

Plain English

Safely closing and cleaning up the large piles where ore was chemically processed to extract minerals.

Etymology & History

Origin languageEnglish
Rootheap (Old English) + leaching (Old English lecan) + pad (uncertain) + decommissioning (de- + commission)
First recorded use1990s
Usage frequencyUncommon

Usage

"The copper mine's heap leaching pad decommissioning required special cyanide treatment before final capping."

Style guide notes: Specify the chemical type (cyanide, acid) when describing particular pad decommissioning projects.

Also known as

pad closure leach pad remediation ore pad decommissioning

Contrasted with

active leaching operation pad construction

Related Terms

Frequently Asked Questions

What chemicals must be removed during heap leaching pad decommissioning?

Common chemicals include cyanide, sulfuric acid, and residual solvents used in mineral extraction processes.

Why is heap leaching pad decommissioning environmentally critical?

Improperly decommissioned pads can leach toxic chemicals into groundwater for decades.

Why Test Candidates on This?

Relevant for assessing remediation costs and environmental liability at metal mining reclamation sites.

Required skill level: Senior

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