Use of Weak-base Ion-exchange Resin for Gold Ore Processing
Large-scale continuous Resin-In-Pulp process tests were conducted at Irgiredmet. The object for testing was the sample of oxidized gold ore from one of Siberian deposit. Weak-base ion exchange resin PuroGold was used as adsorbent.The duration of Resin-In-Pulp tests was sufficient for a completing of three cycles Adsorption/Elution. Gold in feed was 0.95 mg/L. Gold in solid phase of adsorption tails-0.065 g/t. Gold in liquid phase of adsorption tails-0.026 mg/L. Total gold in adsorption tails -0.11 g/t. Gold recovery -94.3 %. The use of regenerated resin had practically no effect on gold losses with adsorption tails.Alkaline cyanide solution (NaCN-20g/L, NaOH- 5g/L) was used as eluent for gold elution from loaded resin. Elution temperature -60 ℃. Number of eluent bed volumes passed -10. Loaded resin analysis was following (g/ton): Au- 1700～1250; Ag- 400～460; Cu- 250～450; Zn-5100～9600; Fe- 860～1200. Elution efficiency: Au- 95.3%～97.8%; Ag- 84.0%～88.0%; Cu-84.0%～88.0%; Zn- 97.0%～99.0%. Although high zinc resin loading was shown zinc was eluted efficiently.The adsorption properties of fresh PuroGold resin, PuroGold resin after 3 cycle Adsorption-Elutioncycles in comparison with AM-2B resin were tested. It was shown from adsorption isotherms that selectivity of PuroGold resin slightly less in comparison with AM-2B resin mainly due to its higher zinc adsorption properties.It was founded on base of test results that adsorption properties of PuroGold resin was practically constant during three Adsorption/Elution cycles. Gold may be efficiently recovered by resin tested. There were no difficulties during gold elution from loaded resin and its regeneration.PuroGold resin was recommended for industrial use in RIP process. Process design criteria were developed and plant design is on progress at the moment.
Weak-base Ion-exchange resin Gold Cyanidation Adsorption isotherm Elution Recovery
N. S. Voiloshnikova I. I. Grigoryeva G. I. Voiloshnikov M. Y. Scheglov
IRGIREDMET, Irkutsk, Russia PHM Engineering, Moscow, Russia
国际会议
XXIV International Mineral Processing Congress(第24届国际矿物加工大会)
北京
英文
2811-2815
2008-09-24（万方平台首次上网日期，不代表论文的发表时间）