Zhou Y.,Kunming University of Science and Technology |
Zhou Y.,Yunnan Province Engineering Laboratory of Microwave Energy Application and Equipment Technology |
Zhang L.-B.,Kunming University of Science and Technology |
Zhang L.-B.,Yunnan Province Engineering Laboratory of Microwave Energy Application and Equipment Technology |
And 10 more authors.
Huaxue Gongcheng/Chemical Engineering (China) | Year: 2012
The process of microwave drying manganese-carbon alloy ball was investigated. The optimum conditions for the process were determined by using response surface methodology (RSM). Central composite experimental design (CCD) was employed to evaluate the relationship between the input variables including drying temperature, drying time, the mass of material, and the interaction on the corresponding relative dehydration rate. A second-order polynomial model was obtained for predicting the response. The analysis of variance (ANOVA) shows that drying temperature and drying time have the most significant influences on the relative dehydration rate. More than 96.73% of the variation was explained by the models. Over the range studied, the optimum conditions for the relative dehydration rate are as follows: temperature 90°C, time 176 s, material mass 150.61 g, respectively. The predicted relative dehydration rate is 93.96%. Under these conditions, the actual experimental value is 93.25%, which agrees well with the predicted values. The moisture mass fraction of material is 0.26% after microwave drying, which is able to reach the industrial requirement. The results show that predictive model is accurate and effective and the technology of microwave drying of manganese-carbon alloy ball is reasonable and feasible.