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Home Georgian Technologies Chemical Processing of Manganese Carbonate Ores

Chemical Processing of Manganese Carbonate Ores


Chiatura’s mine is presented nowadays till 60% of total stocks of carbonate ore and is enough for obtaining of the manganese compounds for indefinite time. The mentioned ores does not distain to the ore beneficiation by traditional methods. One of the ways of their implication into chemical industry is chemical processing.

The nitric acid technology of the beneficiation of carbonate ores was worked out by us. This method was tested in s/c “AZOT” in Rustavi in semi-industrial conditions. Afterwards the works for improvement of the mentioned technology were carried out.

The optimal conditions of nitro-acid technical processing of carbonate ores are settled:

  • Leaching;
  • Sedimentation of impurities;
  • Filtration;
  • Carbonization;
  • Dehydration;
  • Roasting;
  • Obtaining of manganese saline.

Introduced novelty was tested on the pilot plant of the Institute. The results had shown the increasing of productivity of each device for 20-25%, but the wastages of manganese were reduced for 15-20%.

The reasonability of the chemical processing method of carbonate ores generally is determined by the charges of processing of raw materials, the price of reagent and the quality of the received product.

The received reactive products Mn(OH)2, MnCO3, MnO2 γ- modif., KMnO4 and others meet the world standards. Also because of the high price of the reactive compounds, the process economically will be reasonable. According to the data, received as a result of the large-scale laboratory balance experiments it was settled that for obtaining of one tone manganese concentrate, it is necessary:

  1. Carbonate ore – 3.1 t.
  2. Nitric acid – 2.8 t.
  3. Ammonium sulphate – 0.7 t.
  4. Ammonia (fluid) – 0.64

In the process there is produced:

  1. Manganese concentrate – 3.1 t., where Mn is 95.8%
  2. Saltpeter (MN4NO3) – 3.4 t.
  3. Sludge for building material – 1.8 t.

Innovative Aspect and Main Advantages

The received concentrates include: Mn2O3 – 95.8%, where the Mntotal ~ 65%; other impurities – 4.2 %.

Areas of Application

The concentrates can be used for melting of especially important steels, which include the minimal quantity of phosphate. At the same time by processing of received Mn2O3 the expensive manganese reactive compounds KMnO4, Mn(NO3)2, MnCO3, MnO2 γ-modif. and others are received which economically reasonable.

Stage of Development

The technological scheme tested on a laboratory pilot plant; covered by patents of USSR # 1497252, 1541190, 569540.

Contact Details

R.Agladze Institute of Inorganic Chemistry and Electrochemistry
11 Mindeli str. 0186 Tbilisi, Georgia
Contact person: Tengiz Chkonia
Tel: (+995 32) 39 2134
Cell: (+995 32) 99 652307
E-mail: This e-mail address is being protected from spambots. You need JavaScript enabled to view it

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