[Process introduction] : Gold heap leaching process is to break low-grade gold ore to a certain particle size (or granulation), pile it on a leakproof bottom mat made of asphalt, concrete or plastic materials, spray with low-concentration cyanide, alkaline solution, non-toxic solvent or dilute sulfuric acid and other solutions on the mine heap to dissolve gold, and the gold-containing solution percolates out from the mine heap. Then the gold is recovered by activated carbon adsorption or zinc powder replacement precipitation.

[Application field] : Gold heap leaching is often used to develop small ore bodies or low-grade gold deposits, or both, and cannot be exploited by conventional methods.