Improving gold recovery from artificial preg-robbing ore by pre-treatment using blinding agent and resin-in-leach

In the present paper,the effectiveness of the use of blinding agents,ionic exchanger resins and the combination of them in improving gold extraction from simulated preg-robbing ore is discussed. the blinding agents used were kerosene,diesel oil and pine oil,while the ion exchange resins used were lewatit monoplus mp 800,lewatit af 5 and guanidine. preg-robbing conditions were simulated by blending fine activated carbon with ore sample. the investigation results show that the presence of artificial carbonaceous materials at 2% (w/w) in the gold ore significantly reduces gold recovery. pretreatment of artificial preg-robbing ore prior to cyanidation by mixing with kerosene,diesel oil and pine oil for 0.5h improved gold recovery up to 25.4%. a combination of pre-treatment using blinding agent and a resin in leach (ril) test using lewatit mp 800 resin demonstrated a synergistic effect that improves gold recovery up to a level of 99.5%,which is significantly higher than using activated carbon and without pretreatment. © 2016 published by itb journal publisher.