Heap leaching gold Technical Overview
Heap leaching gold refers to the low-grade gold ore flotation tailings or material on the bottom floor mat pile, sodium cyanide solution through the spray cycle, the ore of gold, silver dissolved out. Bearing pregnant solution with activated carbon adsorption, precipitation or replacement of zinc electrolytic deposition methods such as direct recovery of gold, after extracting gold tailings discharged after disinfection.
Heap leach gold extraction process is simple, easy operation, less equipment, less power consumption, investment, quick, and low production costs. Heap leaching is used to handle 0.5-3g / t of low-grade ore, gold recovery 50-80%, and can even reach 90%. Therefore, the heap leaching method makes no economic value originally thought many small gold mines, low-grade ore, tailings or waste rock can now be economic recovery. China in the 1980s, the heap leaching method is widely used in industrial production.
Heap leaching method is suitable for processing the following mineral resources:
A larger scale, previously thought not use low-grade gold and silver ore;
2, peel off during mining low-grade gold-bearing "waste";
3, geological exploration and mine excavation pit mining out in low-grade gold-bearing ore;
4, the gold grade is slightly higher, but smaller, should not be built mechanized gold and silver ore processing plant;
5, using conventional cyanidation process economically disadvantaged gold;
6, gold smelting slag, high-grade large tailings and waste rock containing gold field.
Heap leaching gold production from the heap leach process is mainly built venue, ore pretreatment (crushing or granulation), building the heap, spray leaching solution containing Jingui gold recovery and disinfection of waste rock pile, heap, several unloading parts.
Heap leach production costs: the cost heap leach tailings degrees about 30-40 yuan / ton ore heap leaching costs about 40-50 yuan / ton.