Process for separation and beneficiation of manganese oxide ore

Because manganese ore has low grade, it contains phosphate, iron ore and associated metals, which are not easy to separate. Therefore, it is crucial to separate manganese ore efficiently and economically.

Manganese ore beneficiation plants are designed to produce manganese concentrates of various grades to maximize the recovery of manganese in the most economical way. Manganese concentrates must meet the requirements of the steel industry or other industries.

Manganese ore beneficiation methods

Research has shown that the most effective manganese ore beneficiation methods are washing, gravity separation, magnetic separation and flotation. (Non-mechanical methods such as chemical leaching, electrolysis, ETC are not included)

1. Manganese oxide ore beneficiation method

Manganese oxide ore accounts for most of the available manganese ore. Mainly sulfomanganese ore, pyrolusite and manganese ore.

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

Manganese oxide ore mainly adopts gravity separation

Blocky coarse-grained manganese oxide ore: high manganese content, selected particle size 40-75mm. It can be simply screened or re-selected, and a jig can be used to obtain a coarse concentrate, or a vibrating table can be used to obtain a concentrate.

Fine-grained leaching type manganese oxide ore: low manganese content (less than 30%), fine grains, and high mud. The manganese ore needs to be washed by a drum screen first, and then recovered by a combined process of re-selection (jigging machine) and strong magnetic separation.

Ultra-fine leaching type manganese oxide ore: low manganese content (less than 15%), fine grains, and uniform inlay. It is difficult to separate, and chemical leaching or mechanical ore dressing-chemical leaching combined process is used.

2. Manganese carbonate ore dressing method

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

Manganese carbonate ore is treated by flotation-strong magnetic separation.

Sedimentary sulfate-containing manganese ore: sequential priority flotation process of carbonaceous shale, pyrite and manganese minerals.

Hydrothermal lead-zinc-carbon manganese ore: flotation-strong magnetic separation.

Sulfur-containing manganese ore: desulfurization by roasting.

High-phosphorus and high-iron fine-grained ore: very difficult to select. Chemical leaching, electrolysis, etc. are used.

3. Ferromanganese ore dressing method

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

Compared with oxidized manganese ore, ferromanganese ore is more difficult to select. The difficulty lies in the separation of ferromanganese minerals.

In production, Ftmmachinery uses water washing-gravity selection-roasting-magnetic separation to recover iron and manganese. A manganese concentrate containing 5.4% iron and 46.3% manganese can be obtained. The recovery rate can reach 75.5%.

4. Polymetallic composite manganese ore dressing method

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

For this manganese ore, we used washing, strong magnetic separation, gravity separation, flotation and other processes. That is, the coal slime is washed with a drum screen, and then other recyclable minerals are separated.