Are your extraction processes starting to become an ORE-deal?
Axis House is a major supplier and distributor of chemicals to the mining industry, servicing clients across the globe. Axis House has manufactured a range of products specifically for the gold industry namely:
- Primary Collectors
These products ensure optimal ore recovery.
Optimal froth conditions are created by effectively controlling the laminar layer development and allowing for proper gangue drainage. Combined with improved water rejection ability that promotes final concentrate grade improvements, the HydrofrothTM range also speeds up kinetics whilst maintaining froth mobility.
Polyacrylamides with a range of different charge strengths and molecular weight, improve the settling rate at various solid and liquid separation stages in mineral processing – such as thickening of flotation concentrates, recovery of pregnant leach liquors and dewatering of tailings.
- pH modifiers (Soda Ash, Hydrated Lime, Quick Lime, Caustic Soda)
- Lead Nitrate
- Activated Carbon
- Hydrochloric Acid
- Soda Ash
- SMBS or Hydrogen peroxide (depending on cyanide detox process)
- Copper Sulphate
This has shown an increase in recovery of fine particles (<25 μm) and this is attributed to its effect on the behaviour of the froth phase. When used in dual-collector reagent suites with xanthates, the recovery of free gold and gold-bearing sulphides is markedly improved. As the silver content of the gold surface increases, DLQ2 adsorption increases dramatically. Research has concluded that the addition of DLQ2 results in a more stable froth phase in addition to the synergistic interactions between the reagent and primary xanthate collector – hence the improved floatation performance.
MLQ1 adsorption occurs on pure gold surfaces as both monomeric and dimeric species. MLQ1 has a higher affinity for gold particles with low silver content, thus using the collector in low silver grade ore results in improved recoveries. It is an alternative to the conventional xanthate collectors and requires lower dosages to obtain high recoveries in sulphide-mineral flotation.
The collector by having both a short chained and a branched alkyl group renders the minerals’ surfaces hydrophobic at a faster rate than most collectors, resulting in improved flotation performance when blended with other collectors. The liquid nature of the oily product improves the shelf life significantly, as well as adding to the ease of dosing, as no additional make-up is required.
Ore constituents such as clay-forming minerals and hydrated iron oxides can hinder the attachment of free gold onto the bubble surface.
The hindrance of the free gold attachment to the bubble is more pronounced in the fine size classes with the slimes coating, otherwise floatable minerals.
Revadep 5050 in small amounts can act as a dispersant having a positive impact on both the flotation rate and overall gold recovery.