Non-isothermal oxidation kinetics of synthetic magnetite in air atmosphere
The synthetic magnetite obtained from reduction roasting of Baozipu limonite ore was used as materials,and the thermogravimetric analysis of the synthetic magnetite was conducted using a synchronous thermal analyzer in an air atmosphere. The non-isothermal oxidation kinetics was carried out. According to the Satava Stark integration method,Flynn Wall Ozawa method,and Kissinger method,the most probable model for the oxidation reaction of the synthetic magnetite is determined to be the D3 diffusion model. The integral form of the model was[1-(1-α)1/2]2,the apparent activation energy is Eα=119.181 kJ/mol and the pre-exponential factor A was 2.22×1014 min-1. This study can provide theoretical references for the air cooling technology for the magnetic roasting of refractory iron ore.
refractory iron oremagnetization roastingair coolingoxidation reactionnon-isothermal kinetics
万方数据
维普
