There are 2 methods for extracting gold currently.
Activated carbon and resins readily adsorb gold from cyanide leach solutions. The main advantages of carbon are its high selectivity towards gold, its ease of elution and its large particle size. On the other hand, resins do not suffer from the problems of pore blocking by fine particles in the slurry and show superior adsorption kinetics and higher loading capacity for gold. In addition, when resins are used in the form of fibre-reinforced sheets, many of the problems associated with beads are overcome.
We choose one strong basic and one weak basic ion-exchange resins, considered as exhausted in an industrial demineralizing plant, are screened for gold recovery from cyanide solutions. Based on the observed ability for the recovery and on the ease of regeneration, the weak base anion exchanger Purolite A-100 (Lanlang model is TA301GD )is selected. This spent resin is stable until 60°C and, after regeneration, conserves its physical properties as compared with a new one. Equilibrium data for the resin are determined, proving the very high capacity of the resin for gold (∼500 mg Au/g dry resin).
During the elution process, precipitation of dihydrated potassium aurocyanide occurs inside the resin, increasing the intraparticle resistance to mass transfer. The model is able to reasonably represent the experimental elution results when a large internal resistance to mass transfer is used. A 25-fold concentration of the initial gold solution is obtained in this saturation/elution process, albeit the precipitation, showing the feasibility of the method for the recovery of gold, increasing the useful life of the resins and decreasing pollution.
Lanlang corp have been specializing in water treatment technology for 15year. We could supply TA301GD gold extraction resin to you.
Please check the following data sheet of TA301GD.
|With superior mechanical and osmotic strength, Good kinetic property and very high working capacity for demineralization. The application of this resin is special for gold mine|
|1||Type||Macroporous weakly basic|
|4||Ionic form||Free amine|
|5||Moisture content (%)||50-60|
|6||Quality Total Exchange Capacity (mmol/g)||≥3.5|
|7||Defined Shear Rate (%)||≥95|
|8||Bulk Density (g/ml)||0.65-0.72|
|9||True Density (g/ml)||1.03-1.06|
|10||Particle Size Range (%)||0.60-1.80 mm≥95|
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