1.Gold-bearing sulfide ores with fine gold particles and good flotability.
2.Polymetallic gold-bearing sulfide ores and carbonaceous ores.
3.Insoluble ores which can not be processed directly by mercury mixing or cyanidation, a combined process including flotation is also needed to achieve the best results.
The influence factors of flotation process mainly are grinding fineness , pulp concentration , reagent dosage , inflating volume , flotation time. The parameters of the influence factors should be confirmed according to processing test and practical experience .
For the gold mining that contains only one mineral with gross particles and embedded uniform, usually use one step grinding and flotation process. For the gold particles have diversity sizes and embedded uneven in the gold ore, generally adopt mercury plate and gravity equipment to pre-recover the gold particles between the grinding and classifier, which can higher the overall recovery rate. These two processing ways mentioned are widely used in gold processing. But for the gold ore with other minerals, the flotation process will be more complex, for example, separation process in grinding, mud and sand separation process are all applicable in practice. For flotation in polymetallic ore, its process will be more complex, gold enrich normally in some concentrates , and is sold as an associated mineral.
Flotation equipments include many types of flotation machines , new type flotation column has been used in certain gold ore.
XJK flotation machine is a traditional self-absorption flotation machine while JJF, SF, BF flotation machines are new type self-absorption flotation machine. Self-absorption mechanical agitation flotation machine is the most competitiveness nowadays, because it has simple structure, fulfilled air, dispersion uniform, lower rotating speed of vane, lower energy consumption, less abrasion characters. And this type equipment make it possible for upsizing the beneficiation equipment, among these, KYF flotation machine has the maximum volume tank that could reach 320 m³。