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| Thermodynamic Analysis and Experimental Study on Thermal Reduction Decomposition of Arsenic Calcium Slag |
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Received:February 11, 2019
Revised:February 15, 2019
Accepted:February 19, 2019
Published Online:May 17, 2019
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| DOI：doi：10.3969/j.issn.1007-7545.2019.06.002 |
| KeyWord:arsenic calcium slag; reduction decomposition; thermodynamics |
| Author | Institution |
| LUO Rong-li |
云南锡业研究院有限公司 |
| JI Deng-hui |
云南锡业研究院有限公司 |
| liaoyalong |
昆明理工大学冶金与能源学院 |
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| Abstract: |
| Thermodynamic analysis of carbon thermal decomposition reaction of arsenic calcium slag was carried out with thermodynamic calculation software HSC Chemistry 6.0. It is found that decomposition temperature of calcium sulfate and calcium arsenate can be reduced effectively under reducing atmosphere. According to analysis results, carbon thermal reduction decomposition test of arsenic calcium slag was carried out in tubular furnace to investigate effects of reaction temperature, reductant dosage and reaction time on decomposition of arsenic calcium slag. The results show that arsenic volatility is 93.75% and content of calcium oxide in residue is 78.87% under the optimum conditions including temperature of 1 200 ℃, reductant dosage of 25%, and reaction time of 3 h. |
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