Abstract:In view of the present development and utilization situation of complex refractory magnetite ore, it was pointed out that the development and improvement of separation equipment was one of the key points in the development of iron ore dressing technology. This paper classified the magnetite sorting equipment by the modes action of the main sorting force field and introduced the main structure, separation principle and application of the classical force separation equipment, such as magnetic separation, gravity separation and flotation, also the compound force field separation equipment composed by the forces mentioned above. The results show that the gravity separation has the advantages of low energy consumption, non-pollution and large capacity, but with a relatively higher separation boundary; the flotation separation boundary was lower, but with complex reagent system, higher cost, and also difficult to meet the increasing environmental protection requirements; magnetic separation was more targeted to magnetic minerals, but magnetic inclusions lead to a lower grade magnetic concentrates. The paper proposed that the compound force field separation equipment, as a new type of high efficiency and energy saving equipment, has the advantages of gravity separation, flotation, magnetic separation, the efficiency, selectivity and adaptability of separation were also improved. It was expected that the new multi force field separation equipment with gravity-magnetic-flotation separation functions will become the main research direction in the future, it was inevitable to replace the existing composite force field sorting equipment, and had broad research and application prospects.