| Title |
Kinetics on the Reduction Reaction of Iron Ore with CO - H2 Gas Mixture |
| Authors |
김태규(Tae Kyu Kim) ; 민동준(Dong Joon Min) ; 이영재(Young Jae Lee) ; 김성수(Sung Soo Kim) |
| Abstract |
The reduction rate of iron oxide pellets by CO, H₂ and CO-H₂ gas mixture was investigated in the range of 800 to 1000℃ by using a thermogravimetric analysis. At 900℃ the redcution rate of pellet in the range of FeO-Fe reduction stage was found to be 0.35 ㏖/㎡.sec for 100 H₂, 0.30 ㏖/㎡.sec for 40%CO-60%H₂, and 0.17 ㏖/㎡.sec for 100% CO. The value of activation energies for the reduction reactions were 6.1 ㎉/㏖, 7.6 ㎉/㏖ and 8.6 ㎉/㏖, respectively. By applying mixed control plot method, the effective diffusion rate constant De and chemical reaction rate constant kc were estimated and applied to the unreacted core shrinking model for single interface. The proposed redcution curves by present model showed the good agreement with the experimental results. |