Abstract: Roasting-magnetic separation is an effective way to treat low grade and refractory iron oxide ore.Three commonly used representation methods about dynamics research on iron ore roasting process was concluded，application of both static and dynamic methods used in iron ore roasting process based on the thermogravimetric analysis technology was emphasized.Dynamics research on magnetization roasting，direct reduction and deep reduction process lately is summarized.It is pointed out that magnetization roasting process of siderite can be divided into two stages according to the TG and DTG curves，and its reaction mechanism meets random nucleation and growth mechanism respectively；Direct reduction process on iron ore can be divided into several stages according to the TG and DTG curve，and then classified into slow or rapid reaction stage，from which restricted link of the roasting process will be identified；Hematite will endure three stages，including slow reaction-quick reaction-tendency to equilibrium stage，in the process of deep reduction，the overall reaction fits the random nucleation and growth models，the activation energy is about 320 kJ/mol.It is pointed out that dynamics research on magnetization roasting about natural ore should be emphasized in the future，and provides theoretical support for refractory iron ore roasting key technology.Closely attention should also be paid on combination of thermodynamics and dynamics research during roasting operation，as well as computer simulation research during roasting.

Key words: Thermogravimetric analysis, Magnetic roasting, Direct reduction, Deep reduction, Kinetic