A process where valuable metals (typically gold and silver) are leached from a heap or pad of crushed ore by leaching solutions percolating down through the heap. The metals are then collected from a sloping, impermeable liner below the pad.
As used in this report, a process for recovery of minerals from heaps of crushed ore by percolation of a solvent (such as cyanide for gold, or ferric sulfate and sulfuric acid for copper) through the heap, followed by chemical processing of the lixiviant.
A process whereby valuable metals, e.g., gold, silver, and copper, are leached from a heap of crushed ore by solutions percolating down through the heap.
A process used for the recovery of copper from weathered ore and material from mine dumps. This process can also be applied to the sodium sulfide leaching of mercury ores.
Low cost method of extracting gold from crushed ore by subjecting iy to a spray of dilute cyanide. The gold leaches out and is collected.
An extraction method, whereby gold and silver are leached from a heap, or leach pad, of ore by percolating solvents through the heap and collecting them from a sloping, impermeable liner below the pad.
(3) a low-cost technique for extracting metals from ore by percolating leaching solutions through heaps of ore placed on impervious heap leach pads. This method is usually used on low-grade ores. (4) an extraction process in which stockpiled ore is leached to remove target metals. Leaching solutions, generally weak acids or alkaline cyanide, are percolated through heaps of ore. Leachate is collected and metals contained in the leachate are extracted chemically or electrochemically. Typically, the particle size of the ore to be leached is reduced to increase surface exposure of metal-containing minerals. Despite the reduced particle size after leaching ceases, the heap typically has many properties in common with a waste rock dump. See also cyanidation.
A process involving the percolation of a cyanide solution through crushed ore heaped on an impervious pad or base to dissolve minerals or metals out of the ore.
A low-cost technique for extracting metals from ore by percolating leaching solutions through heaps of ore placed on impervious pads. Generally used on low-grade ores. (no entries so far)(no entries so far)(no entries so far)(no entries so far)
A process whereby gold is extracted by “heaping” broken ore on sloping impermeable pads and repeatedly spraying the heaps with a weak cyanide solution which dissolves the gold content. The gold-laden solution is collected for gold recovery.
Heap leaching is an industrial mining process to extract precious metals and copper compounds from ore.