A quot;refractoryquot; gold ore is an ore that has ultra fine gold particles disseminated throughout its gold occluded minerals. These ores are naturally resistant to recovery by standard cyanidation and carbon adsorption processes.
Ion exchange resins were investigated for the effective recovery of platinum, palladium, and gold from a pregnant cyanide heap leach solution. Screening results indicated that strong base anion exchange resins proved to be most effective in
Adsorption is a term used to describe the attraction of a mineral compound to the surface of another material. Activated carbon is used to adsorb the gold out of solution. Because the cyanide ion forms very strong complexes with gold, it is the gold cyanide complex that is loaded onto the carbon rather than being deposited as metallic gold.
Gold cyanide is adsorbed into the pores of activated carbon, resulting in a process solution that is devoid of gold. The loaded carbon is heated by a strong solution of hot caustic and cyanide to reverse the adsorption process and strip the carbon of gold. Gold is then removed from the solution by electrowinning.
Removal of heavy metal ions from wastewaters A review
Heavy metal pollution has become one of the most serious environmental problems today. The treatment of heavy metals is of special concern due to their recalcitrance and persistence in the environment.
The leaching and adsorption behaviour of gold ores
adsorption onto activated carbon, these effects include competing metal cyanide complexes, preg robbing and the mineralogy of the ore. This thesis considers these areas from an experimental and modelling viewpoint. In this research it is shown that a variety of metal cyanide species can be used to leach gold from certain refractory ores.
Mineral Processing,Equipment Manufacturers,Ball Mills
Solutions. Gold CIP Production Line adsorbs gold from cyaniding pulp by active carbon including 7 steps leaching pulp preparation, cyaniding leaching, carbon adsorption, gold loaded carbon desorption, pregnant solution
Gold nanorods Synthesis, characterization and applications
This article provides an overview of current research into the synthesis and properties of gold nanorods. Interest in rod shaped nanoparticles stems from their unique optical properties, which can be approximated by MieGans theory.
Adsorption and Ion Exchange. Adsorption on activated carbon is the most widely used method to recover gold from cyanide solutions, but once it is loaded you must be able to recover the gold from the carbon.
Publications Definition of Terms. The definitions found here pertain to the field of science involved with solution and colloid chemistry. Similar terms from other fields of science, such as nuclear science, are not applicable to solutions and colloids.
Acid washing has proven to be a very cost effective means of maintaining the activity of activated carbon. During operation, carbon will typically become fouled due to an accumulation of precipitated mineral salts.