Research on microwave carbon thermal reduction of oolitic hematite with orthogonal test

An orthogonal test was carried out to investigate the effect of reduction temperature, reduction time, C/O mole ratio and basicity on the metallization ratio in the reduction of oolitic hematite. The results showed that: the impact of various factors of a primary and secondary order were reduction temperature, C/O mole ratio, basicity and reduction time. The influence of temperature was of significance. Metallization ratio increased with the increase of temperature and time. As the C/O mole ratio and basicity increased, metallization ratio increased first and then decreased. Metallization ratio of oolitic hematite can reach 90.83% under the optimal reaction conditions.