the most popular flotation route in iron ore industry, the direct flotation of iron ox ides still appears desirable for some low grade iron ores that contain a vast amount of quartz. For example, at Republic Mine, Michigan, U.S.A., a hematite ore is upgraded from 36.5% Fe to 65.4% Fe with a Fe recovery of 82.5% using the direct flotation route.
flotation cells. CPT Inc. has developed a flotation process for the production of Direct Reduction as well as Blast Furnace grade concentrates utilising column flotation technology. This process has been adopted by several major iron ore producers and current aggregate production is approximately 50 MTPY of DR grade concentrates.
Inside the ball mill, the crushed iron ore will grind the ore to about 0.2 mm with 3 inch steel balls. 3.This iron ore slurry is pumped to the agitation tank. This iron ore slurry is finally pumped to the flotation machine with the fine sulfide ore going to froth flotation cells for recovery of iron.
Despite the advantages of column flotation reported in the literature, the use of column cells in iron ore flotation has mainly been reported in South America. In a typical mill in North America, the iron ore flotation section consists of mechanical flotation cells arranged in rows4. 5. Summary
Strong magnetic iron ore belongs to free milling mine, which can get high grade iron concentrate with weak magnetic separation process. With the improving demand of iron ore concentrate, Xinhai has speeded up the research and innovation of magnetic iron ore dressing technology and magnetic separation equipment in recent years, and achieved ...
Two stage flotation with the columns could produce a concentrate that was up to 70.2% Fe at 87.5% iron recovery, compared to 70.4% Fe at only 77.7% iron recovery for four stages of flotation in conventional cells. It was shown to be particularly important to operate the columns to recover a maximum of the quartz gangue into the froth.