METHOD OF SULPHUR REMOVING OF ACTIVE MASS AND LEAD ACCUMULATORS LATTICES Russian patent published in 2010 - IPC C22B13/00 C22B7/00 

FIELD: metallurgy.

SUBSTANCE: method includes sulphur removing in two stages. At the first stage lead sulfate from active mass is put into contact with Na₂CO₃ in solution, receiving dispersion, containing carbonised active mass on the basis of main lead carbonates. At the second stage this dispersion is put into interaction with CO₂ with formation of dispersion, containing sweet active mass on the basis of PbCO₃. Between these two stages it is implemented granulometric division with following sulphur removing of coarse grain.

EFFECT: effective sulphur removing with almost total removing of sodium during sulphur removing.

28 cl, 3 dwg, 6 ex