Also known as red hematite ore its chemical formula is Fe2O3, it is a kind of weakly magnetic iron ore, good flotability of the magnetite, is one of the main raw material of iron. Its main mineral processing technology has a gravity separation, flotation and magnetic separation or with a variety of mineral processing process, also has a weak magnetic separation technology after magnetization roasting.
Early re-election technology on hematite ore dressing more commonly, basically have jig, centrifugal separator, spiral chute, spiral concentrator, shaking table and so on, because of its small mineral processing capacity, low grade of ore dressing, low recovery rate and gradually become obsolete.
It developed flotation hematite ore dressing process and magnetic separation process, mainly with oxidized paraffin soap as collector is flotation technology and with electromagnetic flat ring strong magnetic separator for separating magnetic separation technology of the equipment. But its separating technical indexes were not achieve satisfactory results.
In recent years, the choice has been a rapid growth of iron equipment, its main mineral processing technology is a delegate with electromagnetic pulsating high gradient magnetic separator magnetic separation beneficiation technology and represented by a series of reverse flotation of the ore dressing process. Especially with strong magnetic – flotation process makes some mines hematite choose don’t reach the iron concentrate.