Author/Authors :
Man، نويسنده , , Y. and Feng، نويسنده , , J.X. and Li، نويسنده , , F.J. and Ge، نويسنده , , Q. and Chen، نويسنده , , Y.M. and Zhou، نويسنده , , J.Z.، نويسنده ,
Abstract :
In this study, the kinetics of reduction in iron ore–coal composite pellets has been investigated. Kinetic parameters were estimated from thermogravimetric data. X-ray diffraction was used to identify the products obtained after heating the composite pellet to different temperatures. Experimental results indicate that the reduction process is diffusion controlled below 900 °C. There is a change in reduction mechanism above this temperature and mixed control is observed up to 1100 °C above which reduction is phase-boundary controlled. The reduction rate has also been observed to decrease with progress in reduction.
Keywords :
Thermogravimetric experiments , Direct reduction , Iron ore–Coal composite pellets , reduction kinetics
