Manganese ore production process

Manganese ore production process

The whole production and processing process of manganese ore is divided into four steps: crushing and screening, milling and sorting, magnetic separation and drying.


Advantages of manganese ore production process

What are the common selection processes for manganese ore?

Manganese is an important metal and is widely used in industry. More than 90% of the world’s manganese ore reserves are concentrated in South Africa, the former Soviet Union, Australia, Gabon, Brazil and India. China’s manganese ore reserves are abundant and rank among the top in the world. Manganese ore is divided into two major categories: carbonate manganese ore and manganese oxide ore according to its natural type. China has more manganese ore carbonates, accounting for 57% of the total reserves of manganese ore.

At present, manganese ore beneficiation methods are re-elected (mainly jigging, shaker selection), heavy medium-strong magnetic separation, roasting-strong magnetic separation, single strong magnetic separation, flotation, and combined beneficiation methods including several methods. Manganese minerals are weak magnetic minerals, which have a large difference in magnetic susceptibility and gangue minerals. Therefore, strong magnetic separation of manganese ore occupies an important position.

The main minerals in manganese carbonate ore are rhodochrosite, calcium rhodochrosite, manganese calcite and rhodochrosite; gangue minerals are silicate and carbonate minerals, often accompanied by impurities such as sulfur and iron.

Most of the manganese carbonate ore beneficiation methods use strong magnetic separation, heavy medium ore dressing and flotation.

Sedimentary sulphur-containing carbonic acid, manganese ore generally uses a sequential preferential flotation process of carbonaceous shale, pyrite and manganese minerals.

The hydrothermal lead-containing zinc manganese carbonate ore generally adopts a flotation-strong magnetic separation process.

Some sulfur-rich manganese ore, manganese minerals are mainly sulphur-manganese ore, generally using roasting method to remove sulfur.

Some carbon-rich manganese carbonate ore is also produced by roasting to remove volatile components to obtain a finished ore.

Manganese carbonate ore contains some refractory ore. Manganese is closely symbiotic with iron, phosphorus or gangue. The size of the clamp cloth is very fine and difficult to sort. It can be treated by smelting method. For example, a manganese-rich slag method for treating high-phosphorus high-iron manganese ore, a nitric acid leaching method for producing active manganese dioxide, and an electrolytic method for producing metal manganese have been applied to industrial production. In addition, there are calcium disulfate method and bacterial leaching method.

Manganese minerals in manganese oxide ore are mainly hard manganese ore, pyrolusite and manganese ore. The gangue minerals are mainly silicate minerals and carbonate minerals, often accompanied by iron, phosphorus, nickel and cobalt. The ore dressing method of manganese oxide ore is mainly based on re-election.

Weathered manganese oxide ore often contains a large amount of slime and fine ore, and the washing and re-election method is adopted in production. The ore is washed ore to remove the net ore from the slime, and some can be used as finished ore, and some need to be selected by jigging and shaker.

Washing overflows sometimes require further recovery by re-election or strong magnetic separation.

Some sedimentary primary manganese oxide ore, due to the depletion of mining, the use of heavy medium and jigging to remove gangue, to obtain lump ore concentrate.

Among the iron-containing manganese oxide ores, the iron mineral is mainly limonite. Iron and manganese are difficult to separate by re-election, flotation or strong magnetic separation, and a reduction roasting magnetic separation method is required. A washing-reduction roasting magnetic separation-re-election process has been employed in the industry.

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