Hard Rock Gold Mining
Compared with placer gold rock gold orehas higher gold content and mining value, but the beneficiation process of rock gold ore is much more complicated than that of placer gold ore. Rock gold mines mostly useflotation and cyanidation processesaccording to their characteristics.
Rock Gold Mining Process
Introduction
About Hard Rock Gold
Rock goldis also calledmine goldoralloy gold. Most of the gold mines are deposited and accumulated by the hot springs gushing underground through the thin cracks of the rock and are often sandwiched with quartz in the cracks of the stone. Rock gold is mainly associated with other metals, includinggold, silver, platinum, zinc, and other metals. It calls them alloy gold before extracting other metals. Rock gold is produced in different mines and contains various components of other metals. Therefore, the fineness varies, generally between 50% and 90%.
The gold is hidden in the quartz veins in the rock. People need to find the gold-bearing rock first, mine the orecrush and ball mill, and then usegravity beneficiationorflotationmethod to purify the gold after the gold becomes single gold.
Mineral Processing
Hard Rock Gold Mineral Process
Basic diagram of rock gold process
1. Rock Gold Ore Flotation Process
Flotationis used in gold beneficiation plants to treat rock gold oreandgold-bearing sulfide mineralswith high float-ability. The flotation process can enrich gold into sulfide minerals to the maximum extent, and the tailings can be directly mixed with mercury or cyanidated for gravity separation. It's with low beneficiation cost.
crushing operationmainly includes two or three sections' closed-circuit process. The coarse crushing adopts a jaw crusher or cone crusher, the crushing ratio is 3~4, and the particle size of the crushed product is 250~320mm. The medium and fine crushing operations use a cone crusher or jaw crusher, the crushing ratio is 4-6. The screening operation is set in the last crushing process, and it is designed as inspection screening or pre-inspection screening according to production needs, and the particle size of the final crushed product is controlled at 8-14mm.
flotation of gold mineralsgenerally adopts aone-stage grinding→ flotation process.The requirements for the grinding fineness of gold ore typically require only the dissociation of the sulfide ore monomer for gold wrapped in sulfide minerals. The grinding class of the gold continuously grown by the gangue needs to achieve the dissociation of the gold monomer.
2. Rock Gold Gravity Separation Process
The primary beneficiation method of rock gold is flotation. Still, it can't obtain a good beneficiation effect for coarse-grained crystalline rock gold ore, whether flotation or cyanide. In the beneficiation process, it must recover this kind of gold ore as soon as possible. Coarse-grained gold and fine-grained gold can be selected by flotation or cyanidation. For the beneficiation method of coarse-grained gold ore, due to the large specific gravity difference between gold and gangue, usinggravity separationto grind and separate the basic monomers can obtain a good separation effect.
3. Rock Gold Mine Cyanidation Process
gravity separation processis an essential prerequisite incyanidation processof rock gold ore. The gravity separation equipment can enrich the rock gold ore, and the amount of ore entering the cyanidation process is small. The cyanide consumption is low, the cyanidation efficiency of the gold ore is improved, the environmental pollution is small, and it can save the infrastructure investment and investment costs.
A vibrating screen and classifier separate the rock gold raw ore after being crushed by a jaw crusher and cone crusher. Return the unqualified ore materials to the ball mill for grinding. The qualified ore materials are cleaned, cleaned, and reground by the flotation machine. Finally, the leaching agitation tank is used to complete the cyanide gold separation process.
