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Home Georgian Technologies Anodes for Improvement Technical, Economic and Environmental Indices of Manganese Electrowinning Process

Anodes for Improvement Technical, Economic and Environmental Indices of Manganese Electrowinning Process

Description

Essentially doped lead anodes used in metals (Mn, Zn, Cd, Cu, etc.) hydrometallurgy production practice. There is forming slime containing insoluble lead and manganese compounds on anodes during electrolysis and it is a process waste. The sliming is the greatest precisely during manganese electrowinning (0,38-0,45 t per ton of the product- Mn). Formation and accumulation of this amount of useless slime arises a number of problems:

  • Environment pollution by waste products;
  • Unproductive raw material and energy consumption, resulting in increase of overall volume of facilities and capital investments;
  • High-energy consumption during preparation of additional quantity of manganese containing solution for electrolysis baths;
  • Hard-predictable anode destruction caused by active corrosion along “waterline”;
  • Frequent clean up of anodes and baths (once in 20-24 days), replacement of diaphragms, remelting of anodes. Its sharply decrease annual productivity of electrolysis baths.

The new type anodes have been developed, it makes possible to reduce forming of slime by order (0,02-0,04t per ton of the product instead of 0,38-0,45t) without changing the electrolysis electric parameters (bath voltage 3,5-5,5 V, cathode current density 400 – 600 A/m2).

Innovative Aspect and Main Advantages

The anodes of two types are offered:

  • Anodes with dielectric surfaces with active section of current conducting material;
  • Titanium anodes with lead doped surfaces.

In the manganese hydroelectrometallurgy the replacement of exiting anodes with new one permits:

  • increase a total extraction coefficient of manganese by 6-8%;
  • exclude an environmental pollution by waste products in the stage of electrowinning;
  • exclude anodes corrosion destruction along “waterline”;
  • decrease a consumption of raw materials and energy by 8-10%;
  • increase the coefficient of working time of bath and their annual efficiency;
  • decrease the main reactors volume and capital investments.

Areas of Application

Hydroelectrometallurgy.


Fig. 1 Anodes for manganese electrowinning process.

Stage of Development

Anodes were tested in laboratory and large-scale condition; covered by patents of Georgia: #2001 2412, # 2002 876 U.

Contact Details

R.Agladze Institute of Inorganic Chemistry and Electrochemistry
11 Mindeli str. 0186 Tbilisi, Georgia
Contact person: Tinatin Lezhava
Tel: (+995 32) 21 5952; 30 1430
Fax: (+995 32) 30 1430
E-mail: This e-mail address is being protected from spambots. You need JavaScript enabled to view it , This e-mail address is being protected from spambots. You need JavaScript enabled to view it

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