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| Optimization of Microwave Drying of Lead Slag with Response Surface Methodology |
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Received:June 11, 2012
Revised:June 13, 2012
Accepted:June 13, 2012
Published Online:November 26, 2012
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| DOI：10.3969/j.issn.1007-7545.2012.12.002 |
| KeyWord:microwave drying; lead slag; response surface methodology(RSM); optimization |
| Author | Institution |
| LI Jian |
昆明理工大学冶金与能源工程学院 |
| ZHANG Ji-bo |
昆明理工大学冶金与能源工程学院 |
| PENG Jin-hui |
昆明理工大学冶金与能源工程学院 |
| LIU Bing-guo |
昆明理工大学冶金与能源工程学院 |
| ZHOU Yue |
昆明理工大学冶金与能源工程学院 |
| GUO Lei |
昆明理工大学冶金与能源工程学院 |
| LIU Chen-hui |
昆明理工大学冶金与能源工程学院 |
| WANG Ya-jian |
昆明理工大学冶金与能源工程学院 |
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| Abstract: |
| A new technology of microwave heating was applied to dry lead slag. The effects of drying temperature, drying duration and material thickness on the dehydration rate of lead slag were investigated by means of the response surface (RSM) central composite design (CCD), and the mathematical model was established. As can be seen from the ANOV, quadratic of mathematical model is better than others in terms of goodness of fit. The material thickness and temperature are found to exert more significant effects on the dehydration rate than drying duration. The optimum conditions for dying with microwave radiation include temperature of 93 ℃, duration of 10 min and material thickness of 19 mm. The optimum dehydration rate is 67.48% with the relatively error of just 0.73 percentage point. The moisture content after drying is less than 8.12%, which satisfies the technological requirements of following processes. |
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