Method for separating and recovering iron and titanium from vanadium extraction slag through coal-based reduction-magnetic separation

The invention belongs to the technical field of metallurgical engineering, and particularly relates to a method for separating and recovering iron and titanium from vanadium extraction slag through coal-based reduction-magnetic separation, which comprises the following steps of: performing wet ball milling, acid leaching, filtration, dehydration and high-pressure roller milling on vanadium-titanium magnetite concentrate sodium modification vanadium extraction slag to prepare green pellets with the granularity of 8-16mm; and the green pellets are subjected to oxidizing roasting, direct reduction in a coal-based rotary kiln, residual coal removal through magnetic separation, electromagnetic induction heat treatment, crushing, ball milling and magnetic separation, and reduced iron powder and high titanium slag are obtained. According to the method, the reduced iron powder and the high titanium slag with the iron content larger than 88% and the recovery rate larger than 90% are finally obtained; according to the