|
| Phase Study and Comprehensive Utilization of Low Grade Roasted Cyanide Tailings |
|
Received:May 09, 2023
Revised:May 17, 2023
Accepted:May 18, 2023
Published Online:July 10, 2023
|
| View Full Text View/Add Comment Download reader |
| DOI：doi：10.3969/j.issn.1007-7545.2023.08.014 |
| KeyWord:cyanide tailings; phase structure; hematite; magnetite; encapsulated gold |
| Author | Institution |
| SUN Liu-gen |
矿冶科技集团有限公司 |
| JIANG Kai-xi |
福州大学 |
| XIE Feng |
东北大学 治金学院 |
| ZHANG Zheng-yang |
矿冶科技集团有限公司 |
| TANG Ji-gang |
矿冶科技集团有限公司 |
| MI Jian-guo |
矿冶科技集团有限公司 |
| HOU Jian-feng |
吕梁学院化学化工系 |
| BAI Yun-long |
东北大学冶金学院 |
| HAN Lu-yang |
东北大学冶金学院 |
|
| Hits: 1577 |
| Download times: 1514 |
| Abstract: |
| Cyanide tailings have the characteristics of large production, difficult recovery and reuse, high hazard, and high value of recovery. Different sources of cyanide tailings have different elemental states, so different processing technologies are required. The phase composition of roasted cyanide tailings was investigated, and it is found that the water-insoluble phase mainly consists complex slag particles formed by iron oxides, incompletely oxidized sulfides, and partial sulfides; the water-soluble phase is a sulfate salt containing about 7% sodium-calcium. The correlation between gold-iron dissolution was studied, and it is found that the porous structure of hematite in the tailings encapsulated gold. During the aqua regia leaching process, the gold-iron leaching rate has a similar trend. Therefore, a reduction-roasting cyanidation process was adopted. Under the conditions of 7% coke consumption, roasting temperature of 650 ℃, roasting time of 2 h, leaching slurry concentration of 25%, slurry pH value of 10.5, sodium cyanide concentration of 8‰, and leaching time of 24 h, the residue gold extraction rate is 76.43%. |
| Close |
|
|
|