Abstract: The ore properties of deep hematite in Hainan Mining are investigated. According to the properties, such tests as pre-concentration by dry high intensity magnetic separation and jigging are made. Lump ore with yielding of 35.26%, Fe grade of 55.35%, and recovery of 49.85% are primarily obtained from run-of-mine by classification, dry high intensity magnetic separation and jigging. Meanwhile, lump tailings with discarding rate of 21.61% and Fe grade of 10.83% are obtained. By this method, the amount of ores for grinding can be significantly reduced with obvious energy saving.

Key words: Pre-concentration of hematite, Tailings discarding by pre-concentration, Dry high intensity magnetic separation, Jigging gravity