Research on Beneficiation Technology of Ilmenite from an Ultra Low-Grade Magnetite

To realize economical and compre hensive utilization of ilmenite from an ultra low-grade ore in Hebei, the technical process of stage grinding, high intensity magnetic separation and flotation is determined. In this process, ilmenite pre-concentration by high intensity magnetic separation is firstly conducted under coarse grinding condition followed by the regrinding of rough concentrate, and then ilmenite flotation is carried out using a new-type collector of BK416 without depressant addition. By adopting above mentioned technique, the ilmenite concentrate grading 45.48% TiO2was obtained, with recovery of 41.01%, while the ultralow-grade magnetite raw ore containing 4.03% TiO2,and this could realize the comprehensive utilization of ultra low-grade ilmenite ore resources.