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Manganese ore is one of the main resources for obtaining manganese and iron. Among manganese ore resources, 73% of manganese minerals contain high iron elements, and the particle sizes of manganese and iron minerals are relatively fine, with obvious Iron and manganese are isomorphic, and the degree of monomer dissociation is difficult, making the selection difficult. Therefore, the factory adopts a variety of joint beneficiation methods to select the Biemeng iron ore. At present, the main separation methods for iron-manganese ore include gravity separation, magnetic separation, flotation, roasting and fire enrichment.
Ferromanganese gravity separation, ferromanganese magnetic separation, ferromanganese flotation, ferromanganese roasting process
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Click to add WeChatThe gangue ore of manganese ore is mainly silicon dioxide, and the proportion of iron and manganese oxidation is relatively large. Therefore, the jig gravity separation method is often used. Manganese iron ore is mostly suitable for manganese iron ore with coarser particle size. In actual production, Munters gravity separation is often combined with other processes to form a joint process flow, such as gravity-floatation, gravity-magnetic combined mineral processing processes, etc.
Manganite itself has weak magnetism, and magnetic separation can effectively remove iron impurity minerals. Generally, strong magnetic separation can be used in mineral processing operations. If strong magnetic separation cannot obtain high-quality manganese concentrate, roasting can also be combined to improve the grade of the concentrate.
Flotation is mainly suitable for manganese ore with finer particle size. However, due to the complex composition of manganese ore, its floatability is poor and it is easy to muddy. . Not only is flotation difficult, but it also consumes a lot of chemicals and costs a lot. Therefore, in the mineral processing operation, it is often combined with magnetic separation to form a magnetic-flotation combined mineral processing process to realize the flotation operation of ferromanganese ore.
In manganese iron ore, manganese mostly exists in the form of soft manganese, and iron exists in the form of hematite. The two are closely symbiotic and embedded. The particle size is fine, and there is the phenomenon of isomorphism, which is difficult to separate by conventional gravity separation and magnetic separation methods. The weakly magnetic iron minerals in manganese iron ore can be reduced to strongly magnetic iron minerals through roasting. Iron ore or pseudo-hematite, and then separate manganese and iron through magnetic separation. Roasting methods in mineral processing operations can be divided into three types: reduction roasting, neutral roasting and oxidation roasting.
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