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| Treatment of Cyanide Tailing Slurry by Na2S2O5-Air Method |
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Received:June 15, 2015
Revised:June 17, 2015
Accepted:June 23, 2015
Published Online:November 18, 2015
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| DOI：doi：10.3969/j.issn.1007-7545.2015.12.016 |
| KeyWord:Na2S2O5-Air method; cyanide tailing slurry; detoxification; leaching toxicity |
| Author | Institution |
| QIU Sha |
天津华北地质勘查局;北京有色金属研究总院 |
| GUO Peng-zhi |
天津华北地质勘查局 |
| ZHENG Qi |
北京有色金属研究总院 |
| YAN Bo |
北京有色金属研究总院 |
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| Abstract: |
| Cyanide tailing slurry was detoxicated by Na2S2O5-Air method. The results show that cyanide concentration in tailing slurry drops from 165 mg/L to 0.105 mg/L, copper content drops from 7.95 mg/L to 0.51 mg/L, and contents of COD、Pb、Zn、As、SCN- can reach the second level discharging standard of GB8978-1996 under the conditions including pH value of 10.2, Na2S2O5 dosage of 4.0g/L, no addition of copper sulfate, no air inflation, and stirring time of 2.5h. The treated tailings can be directly discharged as their leaching toxicity can reach the standard of GB5085.3-2007. |
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