|
| Carbothermic Process and Mechanism Study on Zinc Ferrite Decomposition with Microwave |
|
Received:November 14, 2012
Revised:November 15, 2012
Accepted:November 16, 2012
Published Online:April 23, 2013
|
| View Full Text View/Add Comment Download reader |
| DOI：10.3969/j.issn.1007-7545.2013.05.001 |
| KeyWord:kinetics; zinc ferrite; activation energy; microwave; mechanism |
| Author | Institution |
| WangXin |
昆明理工大学 |
| YANG Da-jin |
昆明冶金研究院 |
| PENG Jin-hui |
昆明理工大学 |
| JV Shao-hua |
昆明理工大学 |
|
| Hits: 2797 |
| Download times: 2915 |
| Abstract: |
| The process and mechanism of carbothermic reduction with microwave of ZnFe2O4 were studied. The decomposition kinetics of ZnFe2O4 was carried out with models of carbon gasification, interfacial area of mass transfer, and diffusion control. The effects of microwave power, reaction temperature, ratio of C/ZnFe2O4, and particle size on decomposition rate of ZnFe2O4 were investigated. The results show that the controlling model of decomposition of ZnFe2O4 is carbon gasification control with the kinetics of ln(1-3α)=kt and activation energy of 39.21 kJ/mol. The decomposition rate of ZnFe2O4 is up to 90% under the conditions including microwave heating temperature of 850 ℃, mass ratio of C/ZnFe2O4 of 1/4, particle size of 74~89 μm, microwave power of 1.8 kW, and reaction time of 60 min. |
| Close |
|
|
|