24-hour service hotline
0086 18733132385
Send us an email
[email protected]
Manganese oxide ore and manganese carbonate ore are two main types of manganese ores in industrial production. Manganese oxide ore is mainly composed of pyrolusite, pyrolusite and manganese ore, and its gangue minerals are mainly silicate minerals, including quartz, zircon, biotite and muscovite, and are often accompanied by elements such as iron, nickel and cobalt. The main manganese minerals in manganese carbonate ore are rhodochrosite, calcium rhodochrosite, manganese-containing calcite and rhodochrosite, and their gangue minerals often contain dolomite, clay minerals and organic matter, and are often accompanied by impurities such as sulfur and iron. Due to the complex structure, low grade of manganese ore, and the presence of a variety of associated metals and other impurities, it is a difficult ore to be separated.
The separation of manganese oxide ore usually adopts gravity separation, which is suitable for various coarse mixed manganese oxide ores and stacked manganese oxide ores. The equipment commonly used in the gravity separation process includes jigs, shaking tables and heavy medium separation equipment. The gravity separation method has the advantages of low investment, low pollution and low cost, but it has strict requirements on the particle size, mud content and ore viscosity. Ores with high mud content need to be washed and desludged first.
Magnetic separation plays an important role in manganese ore dressing. Manganese ore is a weakly magnetic mineral, and its magnetism increases with the increase of manganese grade in the ore, while gangue minerals are mostly non-magnetic aluminum silicates. Based on the magnetic difference, strong magnetic separation can effectively enrich manganese ore. Magnetic separation methods include dry strong magnetic separation, wet strong magnetic separation, high gradient magnetic separation and superconducting magnetic separation, which have strict requirements on magnetic induction intensity and ore particle size. Wet strong magnetic separators and high gradient strong magnetic separators have developed rapidly and are widely used in the separation of fine-grained ores.
For fine-grained manganese ore and polymetallic manganese ore, flotation is an effective treatment method. Although the flotation of manganese oxide ore is still in the research stage, the flotation technology of manganese carbonate ore has become an effective method for its selection, especially for low-grade fine-grained refractory ores.
With the reduction of high-grade easy-to-select manganese ore and the increase of difficult-to-select low-grade manganese ore, it is difficult for a single beneficiation method to effectively separate manganese ore from other minerals. The combined beneficiation process combines the advantages of different beneficiation methods and has been widely used in the past decade. It is especially suitable for high-iron, high-sulfur and high-phosphorus refractory manganese ores and polymetallic paragenetic manganese ores.
In summary, the beneficiation technology of manganese ore includes gravity separation, magnetic separation and flotation, and the combined beneficiation process plays an important role in the treatment of refractory manganese ore due to its comprehensive advantages.
© 2021 Yantai KZ Mining Processing Technology & Equipment Inc.
