Description

beneficiation for manganese ore
1. ore of manganese oxide
Manganese oxide ore is mainly deposit produced by weathering, and there is also kind of hydrothermal deposit raw and secondery manganese ore. The Mn in this ore is psilometane, pyrolusite, manganite. The gangue is mainly silica, sometimes carbonate with iron, p, Nickel, Co, etc.
For manganese oxide, gravity separation is usually used to beneficiate. There is much mud and powder in weathering manganese oxide ore, so generally flow sheet of washing-beneficiating is used. After mud-removing & washing, the clean ore can be manganese product. However, it needs further separation by jigging-shaking table separation. For the overflow, gravity separation and intensity magnetic separation can be needed for further recycling. For some deposit manganese oxide mine, heavy-medium separation and jigging separation will be adopted to remove the gangue and gain high-grade lumpy concentrate.
For ferro-manganese ore, iron is mainly limonite, and for the separation of iron and manganese floatation separation and intensity magnatic separation will be needed. In the real processing, ore washing-roasting & magnetic separation*-gravity separation.

2. manganese carbonate mine
For manganese carbonate deposit, the manganese is mainly mangan spar and Ca-Mn spar, calcimangite and oligonite with gangue mainly silicate and carbonate mineral and sometimes with impurities of sulfur and iron. Manganese carbonate is hard to upgrading to get high grade concentrate because of its complex composition, fine embedded size and hard liberation. 
The real practice of manganese carbonate is not so common, intensity magnetic separation, gravity separation and floaation separation has been compared and the mineral separation industy chooses floatation separation to get macker, pyrite, and manganese. Some manganse ore contaiins some sulfur and roasting can help to remove the sulfur.