Calcination Process Technology Of Hematite Ore
During the roasting process, siderite FeCO 3 transforms to magnetite Fe 3 O 4 along with producing carbon monoxide CO, but hematite Fe 2 O 3 needs CO to reduce into magnetite.The process of simultaneously roasting and magnetic separation was developed to treat the low grade siderite and hematite ores without adding any reductant.