Reduction properties of high alumina iron ore cold bonded pellet with CO–H 2 mixtures

Abstract

To understand the reduction process of pellets made from high alumina iron ore from Guangxi Zhuang Autonomous Region, kinetic experiments, X-ray diffraction examination and scanning electron microscope analysis were adopted. The results show that temperature, a critical factor, increasing from 850 to 1050°C can increase the reduction degree from 31·03 to 55·01%. With increasing hydrated lime addition, the reduction degree increases. Calcium oxide can participate in the solid reaction and affect the mineral structure of ore, but cannot completely prevent the formation of fayalite and hercynite. As a result, the reduction improvement with calcium hydroxide addition is limited.