Beneficiation process of manganese carbonate ore

In sedimentary manganese carbonate ore, the main manganese minerals are rhodochrosite, calcynite, manganese bearing calcite and siderite, etc; Gangue has silicate and carbonate minerals; It is also often associated with impurities such as sulfur and iron. The ore is generally complex. The embedded particle size of manganese mineral is fine to several microns, which is not easy to dissociate, and it is often difficult to obtain a higher concentrate grade.

The production practice of manganese carbonate ore dressing is less. The methods of high intensity magnetic separation, heavy medium dressing and flotation have been studied. Some sedimentary sulfur bearing manganese carbonate ores adopt the sequential preferential flotation process of carbonaceous shale, pyrite and manganese minerals. Some hydrothermal manganese carbonate ores containing lead and zinc adopt a flotation strong magnetic separation process. Some sulfur-containing and manganese rich ores, the manganese mineral is mainly rhodochrosite, and the roasting method can be used to remove sulfur. Some manganese rich carbonate ores are also produced by roasting to remove volatile components and obtain finished ores.