Patent US2870003 - Method of converting hematite to magnetite .METHOD OF CONVERTING HEMATITE TO MAGNETITE 'Filed June 1'7, 1957, 2 . economical process which will permit non-magnetic hematite iron ores to be . 2 by means of a duct at 4 and Will carry with it a portion of the very fine ore dust.hematite 2 magnetite processing ore method,Hematite: A primary ore of iron and a pigment mineral - GeologyHematite is the most important ore of iron and it has been used by people as a pigment . It is an iron oxide with a chemical composition of Fe2O3. .. Although magnetite contains a higher percentage of iron and is easier to process, hematite is.
hematite 2 magnetite processing ore method