At present, more than 150 types of manganese minerals and manganese containing minerals have been discovered, with more than 20 commonly found, mainly including soft manganese ore, hard manganese ore, water manganese ore, black manganese ore, rhodochrosite, etc; The commonly used manganese ore beneficiation methods include washing, gravity separation, strong magnetic separation, flotation, pyrometallurgical enrichment, and hydrometallurgy.

Manganese minerals belong to weakly magnetic minerals (with a specific magnetization coefficient of X=10 × 10-6~600 × 10-6cm3/g). They can be effectively recovered in strong magnetic field separators with a magnetic field strength of Ho=800-1600kA/m (10000-20000oe), and can generally increase the manganese grade by 4% -10%.

Due to its simple operation, easy control, and strong adaptability, magnetic separation is widely used for the separation of various manganese ores. In recent years, it has occupied an important position in manganese ore beneficiation, and various new types of coarse, medium, and fine particle strong magnetic machines have also been successfully developed.

Typical beneficiation plant

The Taojiang manganese ore dressing plant is a marine sedimentary type manganese carbonate deposit, which belongs to the typical industrial type of high-quality manganese ore in the Taojiang style. The natural types of ore include oxidized manganese ore and manganese carbonate ore; Manganese minerals in manganese carbonate ore mainly include calcium rhodochrosite, rhodochrosite, manganese calcite, manganese dolomite, etc. Gangue minerals mainly include calcite, dolomite, quartz, etc. The specific process is as follows:

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