6 Manganese Ore Extraction Methods

Manganese ore is one of the important raw materials for iron and related industries. It is also widely used in the chemical industry, light industry, construction, national defense, electronics industry and other fields. This text will introduce 6 main manganese ore beneficiation methods, including washing method, gravity separation, magnetic separation, flotation method, chemical beneficiation and fire enrichment, in order to help you extracting manganese ores.

I Washing Method for Manganese Ore

Washing is one of the traditional methods of manganese ore's beneficiation. It has a wide range of practical applications and is generally used in combination with screening, that is, directly flushing the manganese ore on the vibrating screen. Or firstly using a cylinder washing machine or a trough washing machine washes manganese ore, which will be sent to vibrating screen. Manganese ores often contain a large amount of sediment, especially manganese oxide ore, which also produces a certain amount of secondary sludge during the beneficiation process. In this case, washing is perfectly be needed.

The washing method is suitable for rich manganese, which can be smelted directly after washing. Or it can be used in conjunction with other beneficiation methods, so as to avoid the sludge impact on the processing effect.

II Gravity Separation for Manganese Ore

With regard to the gravity separation for manganese ore, jig machine and shaking table are commonly applied. Picked up crushed manganese ores according to different granularity after crushing operation, the coarse-grained ones are separated by jig, and the fine-grained ones by shaking table. The gravity separation method is suitable for manganese ore with simple structure and coarse grain size, and also fit for ores owning the large density difference between manganese mineral and gangue mineral.

III Magnetic Separation for Manganese Ore

Due to the strong magnetism of manganese ore, the magnetic separation can be adopted. Permanent magnetic roller separator, permanent magnetic separator, and induction magnetic roller separator are considered in wet or dry magnetic separation. The magnetic strength is the main factor that affects the recovery effect of manganese minerals. Generally, the recovery is carried out within Ho=800~1600 kA/m (10000~20000 oe). The magnetic separation is mainly suitable for manganese oxide and manganese carbonate ores.

IV Flotation Method for Manganese Ore

The flotation method of manganese ore mainly depends on collectors such as oleic acid, tall oil, and oxidized paraffin soap, with the PH value between 7 and 9. Usually, a small amount of sodium carbonate, water glass, tannin, and phosphate are added to pulp, having the effect of adjusting the pulp, dispersing the sludge, and inhibiting gangue. The dosage is not suggested to be too large, otherwise, it will easily inhibit the manganese beneficiation effect. The reverse flotation method can also be used in manganese ore processing, usually with a combination of strong magnetic separation or gravity separation to remove quartz and phosphorus-containing minerals in manganese concentrate. The flotation method fits for rhodochrosite, pyrolusite and other fine-grained manganese minerals.

V Chemical Beneficiation for Manganese Ore

Chemical beneficiation is one of the effective methods for separating manganese minerals. It mainly depends on the chemical reaction between agents (such as sulfur dioxide, ferrous sulfate, calcium dithionate, or other reagents) and manganese ore, so as to dissolve manganese minerals in the leachate, and then use other reagents to generate manganese precipitate. The precipitated material is filtered to obtain the manganese mineral product. The chemical beneficiation method is suitable for low-grade poor manganese ore and refractory manganese ore.

VI Fire Enrichment for Manganese Ore

The Fire enrichment of manganese ore is also called the manganese-rich slag method. According to the different reduction temperatures of manganese and associated phosphorus, iron, and other substances, making the selective separation is through controlling the temperature in a blast furnace or electric furnace. This method is suitable for hard-to-select poor manganese ores with high phosphorus and iron content.

Above are the six manganese ore beneficiation methods. In actual production, manganese ores often contain various associated minerals, thus a single beneficiation method may not achieve the expected results and the comprehensive recovery should be considered. It is suggested to make ore beneficiation test first and then choose the appropriate processing method according to mineral composition and characteristic, avoiding economic losses and waste of resources.

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