Numerous studies have been conducted on kinetics and mechanisms of iron oxide-carbon systems, most of them introducing the endothermic reaction of carbon gasification )Boudouard reaction) which is the controlling stage of the reduction process. Hence, understanding the kinetics of carbothermic reduction of iron oxides and accelerating factors are very important. In this research, the effects of accelerating factors including mechanical activation, additives and catalysts on the rate of heat transfer in composite beds have been investigated. For this purpose, a laboratory reactor equipped with a hot surface was designed which was enable of creation of temperature gradients or in other word, one directional heat transfer along the bed. Temperature profiles in a fixed bed with hot surface temperature of 1200 °C were measured for 60 minutes using thermocouples placed in different regions of the bed. the results of temperature profiles and phase identification (by XRD) revealed that decrease of heat flux into the bed due to the endothermic carbon gasification reaction and low effective heat transfer of the bed, leads to a decrease in the degree of reduction at areas far from the hot surface. In continuation, to evaluate the effect of mechanical activation as well as the effects of iron as an additive (for increasing the conductive heat transfer rate and catalytic effect in Boudouard reaction) and aluminum as an energy source (by thermite reaction, for improving the amount of generated heat) on the thermal profiles and temperature gradients in mentioned bed, the temperature profiles were measured. Temperature profiles of milled specimens indicate reduction of temperature gradient, increase in heat transfer rate in reaction bed and drastic drop in reduction temperature which can be because of particle refinement and consequently increase in particle contact area. In fact, above parameters might result in an increase in mixed conductive heat transfer and decrease in reaction heat consumption. Presence of iron improves the conductive heat transfer throughout the bed. For specimens milled for long durations, significant decrease in reduction temperature and increase in heat transfer rate were observed on temperature profiles which might be due to severe microstructural changes of reaction mixture in the presence of iron and also its catalytic effect. Addition of aluminum as an energy source results in reduction of temperature difference in different regions of the bed by providing required heat of carbothermic reactions via occurrence of endothermic aluminuthermic reactio so in the milled condition, higher degree of reduction is achievable in composite beds and utilizing of larger pellets is possible. Therefore, it can be concluded that any change in heat transfer rate in the bed might significantly affect the rate of carbothermic reduction reaction. Keywords: Kinetics, Reduction, Heat transfer rate, Boudouard reaction, Pellet, Milling, Temperature profile, Heat conduction, Iron, Aluminum