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Home Georgian Technologies High-Efficiency Reactors of the Continuous Operation for Obtaining of Metal Powders by Electrolysis at Ultra-High Current Densities

High-Efficiency Reactors of the Continuous Operation for Obtaining of Metal Powders by Electrolysis at Ultra-High Current Densities

Description

A new model of a reactor with rotating cathodes has been developed, where obtaining of various forms (dendrite, spongy) of metal depositions and their uninterrupted derivation is possible by realization of ultra-high current densities (5000-50000 A/m2) and low energy consumption (the bath voltage does not exceed 3-6V). The form of the cathode deposits and granulometric composition are regulated by the current density, electrolyte concentration, and speed of cathode rotation.

Innovative Aspect and Main Advantages

  • Continuous conducting of technological process;
  • Increase in productivity of a reactor;
  • Regulation granulometric composition of a target product and improvement of its quality;
  • Full mechanization and automation of technological process;
  • Simplification and reduction in price of technology;
  • Improvement ecological conditions.

Areas of Application

Powder metallurgy; hydrometallurgy. The reactor can be applied for electrowinning of metals with low adhesive capacity (Pb, Ag, Cu, Zn, Ni, Co etc.) and their alloys powders.




Fig.1. Cathode design: 1. Active section; 2. Dielectric surface; 3. Current lead

Stage of Development

The reactor is tested in laboratory conditions on zinc (a) and cooper (b) examples:
a) Dendrite form of zinc, cathode current density 5000- 25000A/m2, bath voltage 3.0-5.5V, current efficiency more than 90%, product purity more than 99%.
b) Spongy form of copper, current density 1000-10000A/m2, bath voltage 2.5-3.5V, current efficiency 94-96%, product purity more than 99.5%.

Covered by patents of Georgia: #1993 381, #1998 1492, #2001 2535, #2001 2536, #2001 2537.

Contact Details

R.Agladze Institute of Inorganic Chemistry and Electrochemistry
11 Mindeli str. 0186 Tbilisi, Georgia
Contact person: Tinatin Lezhava
Tel/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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