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| Harmless Treatment Technology of Manganese Slag Based on Quicklime |
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Received:February 12, 2017
Revised:February 15, 2017
Accepted:February 16, 2017
Published Online:May 19, 2017
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| DOI：doi：10.3969/j.issn.1007-7545.2017.06.016 |
| KeyWord:quicklime; manganese slag; harmless; soluble Mn2 ; NH4 -N |
| Author | Institution |
| LUO Le |
重庆工程职业技术学院 |
| JIANG Lin-hua |
中国环境科学研究院 |
| ZHOU Hao |
重庆工程职业技术学院 |
| DUAN Ning |
中国环境科学研究院 |
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| Abstract: |
| Manganese slag was leached by way of overturn with quicklime as additive. Types and concentration of pollutants in lixivium were analyzed. Effects of additive amount of quicklime, moisture content of manganese slag, and pre-reaction time on harmless treatment were analyzed. The results show that water-soluble Mn2 and NH4 -N are key pollutants with excessive concentration. Quicklime has hydration reaction with water to form good alkaline environment. Hydration reaction realizes good harmless treatment effect by physical inclusion, adsorption, and precipitation. Concentration of water-soluble Mn2 and NH4 -N is 2.60 mg/L and 19.53 mg/L respectively with removal ratio of manganese and NH4 -N of 99.8% and 97.0% respectively under the optimum conditions including additive amount of quicklime of 10%, moisture content of manganese slag of 27%, pre-mixing time of 40 min, and pre-reaction time of 72 h. |
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