Expanded metals or round bars made of magnetic stainless steel are used as matrix. While a direct electric current flows through the energizing coils, a magnetic field is build up in the separating zone. The ring with magnetic matrix rotates around its horizontal axis.
Pure high gradient magnetic separation process to treat oxidized iron ores possess the advantages of simple, low cost, good iron recovery. But iron concentrate grade is usually not high enough.
 
High gradient magnetic-gravity process to treat oxidized iron ores are simple and low cost. But fact is that  iron recovery is usually not high enough.

High gradient vertical ring pulsating high gradient magnetic separators have become the most advanced high intensitymagnetic separator in such iron ore processing industry in China, promoting the oxidized iron ore processing technology developing fast. & (magnetic separator for sale)High gradient magnetic-reverse flotation process is simple and can get good iron concentrate grade and recovery. But usually the iron grinding size is fine and grinding energy consumption is more than other process.

High gradient magnetic-gravity-reverse flotation process possesses the advantages of that coarse liberated iron ore can be recovered by spirals and part coarse tails can be discharged by High gradient magnetic at the primary stage. Only part of fines enters the magnetic separators-reverse flotation stage. This process can get good iron concentrate grade and recovery with low cost, but the flowsheet is more complex than others.