The process of heap leaching gold from gold ore is to crush low-grade gold ore to a certain particle size (or granulate), and pile it on a leak-proof bottom mat paved with materials such as asphalt, concrete or plastic, and use low-concentration cyanide, alkaline The solution, non-toxic solvent or dilute sulfuric acid and other solutions are sprayed on the mine pile to dissolve the gold, and the gold-containing solution is infiltrated from the mine pile, and then the gold is recovered by methods such as activated carbon adsorption or zinc powder replacement precipitation.
Heap leaching gold does not require high terrain conditions, and measures can be adapted to local conditions. Permanent unloading yards or stacking yards can be set up according to the characteristics of the terrain. For example, the tops and slopes of hills are gentler and more open, so they are suitable for building permanent dumping yards.
After crushing to a certain size (30-50mm) by the jaw crusher and cone crusher produced for raw ore, go directly to the heap; or perform granulation treatment (agglomerate finer particles into coarse powder aggregates), and then pass the ore The forklift is transported to the mine pile for pile building.
On the paved ore pile, set up a pile leaching system. After the cyanide solution reacts with the mine, the gold-containing solution (precious liquid) seeps from the bottom of the mine, flows into the precious liquid pool, and is pumped into the adsorption column by the precious liquid pump. The solution after the activated carbon adsorption is a lean liquid, and the lean liquid returns to the spray Reuse the shower system.
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