Well-controlled stirring tank leaching to improve bio-oxidation efficiency of a high sulfur refractory gold concentrate
| Autor: | Qi-dong Zhang, He Shang, Biao Wu, Mei-lin Liu, Jian-kang Wen, Cui Xinglan |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
inorganic chemicals
chemistry.chemical_classification Sulfide Ph control 0211 other engineering and technologies Metals and Alloys General Engineering chemistry.chemical_element 02 engineering and technology engineering.material 021001 nanoscience & nanotechnology Sulfur Tank leaching chemistry Recovery rate Jarosite engineering 0210 nano-technology Refractory (planetary science) 021102 mining & metallurgy Nuclear chemistry Oxidation rate |
| Zdroj: | Journal of Central South University. 27:1416-1423 |
| ISSN: | 2227-5223 2095-2899 |
| DOI: | 10.1007/s11771-020-4377-z |
| Popis: | For the high sulfur refractory gold concentrate with 41.82% sulfur and 15.12 g/t gold, of which 82.11% was wrapped in sulfide, a well-controlled stirring tank leaching was carried out to improve the bio-oxidation efficiency. Results show that bio-oxidation pretreatment can greatly improve the gold recovery rate of high-sulfur refractory gold concentrate, and at the optimum pH 1.3 in this study, compared with the process without pH control, the oxidation rate of sulfur increased from 79.31% to 83.29%, while the recovery rate of gold increased from 76.54% to 83.23%; under this condition the activity of mixed culture could be sustained and the formation of jarosite could diminish. The results also displayed that for the high sulfur refractory gold concentrate, the recovery of gold is positively correlated with the oxidation rate of sulfur, and the recovery rate of gold increases with the increase of sulfur oxidation rate within a certain range. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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