Manganese Ore Beneficiation Plant

As manganese ore is low-grade, containing phosphate ore, iron ore and associated metals, it is not easy to separate. Therefore, the efficient and economical separation of manganese ore is crucial.

The manganese ore beneficiation plant aims to produce manganese concentrates of various grades to maximize manganese recovery most economically. Manganese concentrates must meet the requirements of steel and iron industry or other industries.

Manganese ore beneficiation method

Research proves that the most effectivemanganese ore beneficiation methods are washing, gravity separation, magnetic separation, and flotation separation. (Not include non-mechanical methods like chemical leaching, electrolysis, etc.)

Please note:

• Gravity separation had better recover as much manganese as possible, as this method is simple and has a low cost.
• The flotation process of manganese ore can be found here: Flotation process.
• Iron minerals always exist in manganese ores and can be removed by the magnetic separation.
• The recovery of slime is crucial to the recovery of manganese ore.

Different types of manganese ores use different processing processes. Manganese ore is divided into manganese oxide ore, carbonate manganese ore, iron manganese ore, and polymetallic composite manganese ore.

Beneficiation methods of common manganese ores:

1. Manganese oxide ore beneficiation method

Manganese oxide ore constitutes the majority of available manganese ore. It is mainly dussaurite, pyrolusite, and hydromanganite.

The gangue minerals are silicate and carbonate minerals, accompanied by iron, phosphorus, nickel, cobalt, etc. Manganese oxide ore often produces slime that contains manganese. Therefore, slime is important for recovering manganese.

Manganese oxide ore mainly uses gravity separation.

• Massive coarse-grained manganese oxide ore: high manganese content, selected particle size is 40–75mm. It can be simply screened or use gravity separation to obtain rough concentrate by jig or fine concentrate by shaking table.
• Fine-grained leaching-type manganese oxide ore: Low manganese content (within 30%), fine grains, and high slime. This manganese ore needs to be washed by a trommel screen first, then recovered by the combined process of gravity separation (by jig) and strong magnetic separation.
• Very fine-grained leaching-type manganese oxide ore: Low manganese content (less than 15%), fine grains, and uniform inlay. It is difficult to separate, thus we use the chemical leaching method or the combined process of mechanical beneficiation-chemical leaching.

Required equipment:

2. Manganese carbonate ore beneficiation method

Manganese carbonate ore is mainly rhodochrosite, calcium rhodochrosite, manganese calcite, and rhodochrosite. Its gangue minerals are silicate and carbonate minerals, often accompanied by impurities like sulfur and iron. It is complex and very fine-grained.

Manganese carbonate ore is processed by the method of flotation - strong magnetic separation.

• Sedimentary manganese sulfate-bearing ore: Sequential preferential flotation process of carbonaceous shale, pyrite, and manganese minerals.
• Hydrothermal lead-zinc-carbon-manganese ore: Flotation–strong magnetic separation.
• Sulfur-containing manganese ore: Use the roasting method to remove sulfur.
• High-phosphorus and high-iron fine-grained ore: Very difficult to select. Use chemical leaching method, electrolysis method, etc.

Required equipment:

3. Iron manganese ore beneficiation method

Iron manganese ore uses manganese as the main recovered metal. The total content of manganese and iron is more than 30%.

Compared with manganese oxide ore, iron manganese ore is more difficult to select. The difficulty lies in the separation of iron and manganese minerals.

In production, Hengyang Machinery uses washing - gravity separation - roasting and magnetic separation to recover iron and manganese. The manganese concentrate with 5.4% iron and 46.3% manganese content can be obtained. The recovery rate can reach 75.5%.

Required equipment:

4. Polymetallic composite manganese ore beneficiation method

Polymetallic composite manganese ore contains metal minerals, such as iron, lead, zinc, magnesium, aluminum, copper, and silver, mostly in the form of oxide ores. They are closely combined with manganese minerals, making them difficult to separate.

For this manganese ore, we adopt washing and screening, strong magnetic separation, gravity separation, and flotation separation. That is, wash the slime by a trommel screen, and then separate other recyclable minerals.

Required equipment:

Equipment and applications of manganese ore processing plant

Hengyang Machinery manganese ore processing equipment includes the vibrating feeder, crusher (jaw crusher, cone crusher), vibrating screen, grinding equipment (ball mill), washing ore equipment (trommel screen), beneficiation equipment (shaking table, flotation machine, magnetic separator), and dryer.