Dephosphorization of high-phosphorous oolitic hematite carbon-containing pellets in western Hubei

Based on the characters of high-phosphorous oolitic hematite,the dephosphorization research was carried out with the method of coal-based direct reduction,and Hami coal was used in this experiment. The results show that it can get the iron fine with the lowest mass fraction of P 0.031% in the lab after the processes of coal-based direct reduction and magnetic separation. To get the results,it should insure the best reduction temperature and the proper amount of adding carbon (in this experiment,the best reduction temperature is 1 250℃,the mass ratio of ore to coal is 1.25). The wet balls require the proper binary basicity(R ≤ 0.8),and the proper ore size (the ore size is below 2 mm),and finally the reduction time is required to last until the balance of the reaction (50 min).