中國有色金屬學報(英文版)
Transactions of Nonferrous Metals Society of China
| Vol. 21 No. 3 March 2011 |
ammonium metavanadate using response surface methodology
（1. Faculty of Metallurgy and Energy Engineering, Kunming University of Science and Technology,
Kunming 650093, China;
2. Key Laboratory of Unconventional Metallurgy of Ministry of Education,
Kunming University of Science and Technology, Kunming 650093, China）
Abstract:Parameters of technique to prepare vanadium pentoxide by calcination from ammonium metavanadate were optimized using central composite design of response surface methodology. A quadratic equation model for decomposition rate was built and effects of main factors and their corresponding relationships were obtained. The results of the statistical analysis show that the decomposition rate of ammonium metavanadate is significantly affected by calcination temperature and calcination time. The optimized calcination conditions are as follows: calcination temperature 669.71 K, calcination time 35.9 min and sample mass 4.25 g. The decomposition rate of ammonium metavanadate is 99.71%，which coincides well with experimental value of 99.27% under the optimized conditions, suggesting that regressive equation fits the decomposition rates perfectly. XRD reveals that it is feasible to prepare the V2O5 by calcination from ammonium metavanadate using response surface methodology.
Key words: vanadium pentoxide; ammonium metavanadate; calcination; response surface methodology
