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Cyanidation gold separation (gold extraction by cyanide) methods include two main methods: stirring cyanide gold extraction and percolation cyanide gold extraction. Among them, stirred cyanidation is generally used to treat gold concentrate or full mud cyanidation obtained by flotation. The carbon slurry gold extraction process (CIP) and the carbon leaching gold extraction process (CIL) are often used; or Heap leaching gold selection process.
Stirring cyanide gold extraction equipment: Mainly based on analytical electrolysis system and zinc powder replacement system, it is Activated carbon is put into the cyanide slurry, the dissolved gold is adsorbed on the activated carbon, and then the gold is extracted from the activated carbon;
Percolation cyanide gold extraction equipment: Mostly Mainly pool leaching and heap leaching system, the cyanide leaching solution is used by pool leaching or spraying or percolation to allow the solution to pass through the ore to produce a percolation leaching effect.
Flotation of gold ore is through the introduction of chemicals, changing Differences in hydrophobicity between minerals achieve enrichment. It is generally suitable for processing gold sulfide minerals with finer gold particles and higher floatability, such as gold-bearing quartz vein ores, gold-bearing sulfide ores containing various valuable metals (such as copper, lead and zinc) and graphite-bearing minerals. Gold ores and other minerals can be recovered by flotation. For minerals with more complex ore properties, they can be enriched through flotation + other methods.
Gold ore flotation equipment is mainly based on mechanical agitation and aeration agitation, including XCF type aeration agitation flotation machine, KYF type aeration agitation flotation machine, SF type mechanical agitation flotation machine. Separating machine, JJF type mechanical stirring flotation machine.
XCF type:Suitable for handling large gold ore dressing plants, roughing, sweeping and concentrating operations
KYF type:Suitable for processing a single gold ore, roughing, sweeping and concentrating operations
SF type:Roughing and sweeping in medium and large gold ore concentrators Dressing operation
JJF type:In gold ore dressing plants, it is mostly suitable for roughing and sweeping operations in medium-sized dressing plants
Gold mine gravity separation equipment Gold minerals are beneficiated by utilizing the density and particle size differences between gold minerals and other impurity minerals. For example, if some coarse-grained free gold (+0.1mm) cannot be effectively recovered by flotation or hydrometallurgy, gravity separation is required. Therefore, the gravity separation method is mostly suitable for treating sand/placer gold and vein gold before and after flotation and leaching to recover the coarse-grained gold that is dissociated from the monomer.
The main gold ore gravity separation equipment includes: jig, shaker, spiral chute, centrifugal concentrator, etc.
Jig:Suitable for processing gold ore with a specific gravity difference ≥ 1.25 and dissociation of the ore monomer, and the lower limit particle size can reach 0.04mm p>
Shaking table: The coarse sand bed is suitable for sorting gold ore particles with a particle size range of 0.5-2.0mm, and the fine sand bed is suitable for processing materials with a particle size range of 0.074-0.5mm. Gold ore particles and slime beds are suitable for processing gold ore particles with a particle size of 0.037-0.074mm
Spiral chute:Suitable for processing fine-grained gold ore with low mud content. The ore particle size range is 0.03-0.6mm
Centrifugal concentrator: The requirements for the gold ore particle size are relatively wide, generally the discontinuous type is 0~6mm, and the continuous type is 0~1.7 mm, its recycling particle size: for example, when recovering single natural gold >37μm is easy-to-recycle gold, 10~37μm is recyclable gold, and <10μm is more difficult-to-recycle gold.
The above are several types of equipment used in gold ore separation operations. In addition, the gold ore also needs to be crushed, screened, and ground before the separation operation. , grading treatment to meet the requirements for mineral particle size during separation. After separation, concentrate dehydration and tailings dehydration operations are required. After the concentrate is dehydrated, it enters smelting, and the tailings are dehydrated and sent to the tailings reservoir through a conveyor. Stockpile.
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