Manganese exists widely in nature, and it is almost covered for each mineral and silicate stone. The common manganese ore is manganese oxide and manganese carbonate with or without water. There are about 150 kinds of manganese ore, but there is about 5 or 6 ores of rich manganese among which the most important and most economical manganese ores are pyrolusite, psilomelane while the other three are manganite, braunite, hausmannite, rhodochrosite. Askind of important industrial mineral, the Mn content is 50-70% in these ores.
As kind of weak magnetic ore, the basic beneficiation methods for manganese ore are mainly gravity separation and intensity magnetic separation even though there are many kinds of manganese ores.
The gravity separators mainly refer to jig separators, and sometimes shaking tables. But considering small handling capacity and feeding size limitation of shaking table, it can not be used in large scale manganese separation. And here jigger is the widely used concentrating machine for manganese ore. Jigger for big blocks ore makes gravity separation more common. Jig works on basis of density difference between useful mineral and gangue with its high efficiency, energy-saving, large feeding size, and environment-friendly.
Manganese ore is kind of weak magnetic mineral and intensity magnetic separator can separate manganese from gangue with its high efficiency. For the fine manganese ore, intensity magnetic separator is usually adopted. There are two kinds of intensity magnetic sepration, one of rough separation and one of scavenging separation. Forui intensity magnetic separator adopts magnet of NdFeB material. There are two manget rollers with intensity magnetism. This separation device can be adjusted and this intensity magnetic separator is the main magneic separator for manganese magnetic separation.
For gravity separation of manganese oxide, it is fed into crushers through feeder hopper and conveyor. Then vibrating screen is used to separate the size of 0-8mm and 8-30mm na d+30mm. The mineral of +30mm will go back to the crusher for second crushing while the 0-8mm and 8-30mm minerals go for jiggers of 2LTC6109/8T and AM30 separately for jigging gravity separation to gain manganese concentrate of 0-8mm and 8-30mm.
About the magnetic separation of manganse oxide, it needs intensity magnetic separator. This manganese magnetic separator cnbe used in upgrading of fine, medium inlay manganese. Similar to gravity separation, jaw crushers, vibration screen will be involved before separation. The manganese magnetic separator adopts NdFeB magnet with its own feeders. IT can be also used in upgrading of hematite and limonite. This manganese magnetic separator can avoid dust to guartee health of operater with its circle-closed structure.
