Reduction mechanisms of vanadium-titanomagnetite-non-coking coal mixed pellet

Experiments were carried out by testing the specimens of separate layers of iron and coal and single pellets thermogravimetrically in a nitrogen atmosphere to study the non-isothermal reduction mechanisms of vanadium-titanomagnetite-non-coking coal mixed pellets. The degree of reduction was measured by the weight loss. The E values of the pellet reduction were calculated based on the mass action law. It was found that with increasing temperature the reduction processes may be divided into four stages: reduction via CO and H(2) from volatiles at 400-650 degrees C, reduction via H(2) and C generated by cracking of hydrocarbon at 650-850 degrees C, direct reduction of carbon via gaseous intermediates at 850-1050 degrees C and direct reduction of carbon above 1050 degrees C.