| 摘要 |
<p>A method comprising the steps of solvent extracting a gold bearing chlorination leach solution with DBC, scrubbing the resulting gold bearing organic phase with hydrochloric acid and reducing gold is capable of recovering gold in high purity by: (1) adjusting the concentration of hydrochloric acid in the gold bearing chlorination leach solution to 0.5-1.75 N before the solvent extraction and then scrubbing the resulting gold bearing organic phase with 0.25-0.75 N hydrochloric acid; and/or (2) performing five-stage scrubbing with hydrochloric acid by either one of the following three approaches: i) after three-stage scrubbing, centrifugal separation is effected and separation is then performed by filtration with a filter having an opening size of 0.05-5 mu m, with the resulting organic phase being then subjected to two-stage scrubbing; ii) after five-stage scrubbing, centrifugal separation is effected and separation is then performed by filtration with a filter having an opening size of 0.05-5 mu m; or iii) after three-stage scrubbing, centrifugal separation is effected and separation is then performed by filtration with a filter having an opening size of 0.05-5 mu m, with the resulting organic phase being subjected to two additional stages of scrubbing, followed by centrifugal separation and separation by filtration with a filter having an opening size of 0.05-5 mu m.</p> |
