The invention relates to a technological method for improving the quality of
vanadium-
titanium iron concentrates. Various techniques are integrated. The technological method includes preliminary classification, fine screening classification, three-section ore
grinding, concentration
magnetic separation and stair
magnetic separation. In preliminary classification, a qualified fraction part good indissociation in rough iron concentrates can be effectively classified out, the treatment capability of a mill is improved, and
energy consumption of the product is lowered. In fine screening classification, a fine screening
closed loop is adopted for cyclic ore
grinding, compared with common
rotational flow classification, classification is conducted strictly according to the particle size, meanwhile, the classification efficiency reaches up to 70% or higher, the qualified fraction is better classified out in time, excessive
grinding is reduced, and cyclic loads are reduced. In concentration
magnetic separation, concentration magnetic section is adopted before ore grinding, part of weak magnetic
titanium ore and
gangue can be removed out, excessive grinding of the
titanium ore is reduced,and the titanium
iron ore recycling rate is increased; and meanwhile, the ground ore grade is improved, the yield is increased, and the product cost is reduced. In stair magnetic separation, iron andtitanium separation is well achieved, and the iron concentrate grade is improved step by step.