Siderite is a widely distributed mineral whose composition is ferrous carbonate. A certain large quantity of siderite can be utilized when the content of harmful impurities is low.
A、Roasting-magnetic separation technology: after the material or ore is heated to a certain temperature, the physical and chemical reaction is carried out in the corresponding atmosphere and the weak magnetic siderite is thermally decomposed and converted into ferromagnetic magnetite and maghemite.
B、Strong magnetic separation process: Siderite or magnesium siderite has weak magnetic properties, and strong magnetic separation technology can successfully sort the weak magnetic iron minerals such as hematite and limonite including (magnesium) siderite.
C、Flotation process: There are two major flotation processes: positive flotation enrichment iron and reverse flotation desiliconization.