To take advantage of efficient separation methods Magnetic separation of iron ore can be treated hematite iron ore by weak magnetic magnetic roasting method, so that if the magnetic iron ore into which ferromagnetic iron minerals, can be obtained by magnetic separation and then the Higher mineral processing indicators. The roasting magnetization selection method with magnetization roasting as a preparation operation before magnetic separation has the advantages of no special requirements for water quality, water temperature, easy concentration and dehydration of concentrate, high sintering strength of concentrate, and the present method is still applied in iron ore dressing plants in China.
Magnetization roasting is a process in which the ore is heated to a certain temperature and then undergoes a physicochemical reaction in a corresponding atmosphere. After magnetization roasting, the magnetic properties of the iron mineral are significantly enhanced, and the magnetic properties of the gangue minerals are not changed much. Thus, a variety of weakly magnetic minerals iron or manganese ore, after calcination can be carried out efficiently magnetized magnetic separation.
After hematite, limonite and ferromanganese ore are heated to a certain temperature, the weak magnetic hematite can be converted into a ferromagnetic magnetite by reacting with an appropriate amount of reducing agent.
Hematite starts to deoxidize in a reducing atmosphere at 400 ° C, and becomes magnetite faster at 570 ° C.
PVC Foam Board Extrusion Line,Foam Board Extrusion Line,PVC Board Production Line,PVC Foam Board Extrusion Line
WUXI HOYI PLASTIC MACHINERY CO., LTD , https://www.hoyiplas.com