METHOD OF COMPACTED NICKEL ELECTRO-EXTRACTION Russian patent published in 2009 - IPC C25C1/08 

FIELD: metallurgy.

SUBSTANCE: method includes electrolysis from electrolyte made of purified sulphate solutions with insoluble leady anodes. Additionally electrolysis is implemented at electrolyte circulation with keeping of pH 4.5-5.5; temperature is in the range 59.5-65°C and concentration of nickel ions (II) in the initial electrolyte 100-110 g/dm³, and in the waste 40-50 g/dm³. Concentration of nickel ions (II) in the initial electrolyte is kept by means of inlet 20-48% of waste electrolyte from circulation system. Uninterruptedly it is measured pH of solution and it is automatically kept during the electrolysis process by means of acidity adjustment. Electrolyte is fed into interelectrode spacing on surface of bath through graduated branch pipes. In the capacity of cathode there are used reusable cathodes - matrix, implemented from titanium.

EFFECT: method reduction in price, increasing of engineering-and-economical performance of electrolysis process.

4 cl, 1 tbl