METHOD OF UTILIZATION OF THE SOLUTIONS FORMED AT REPROCESSING OF THE SPENT LEAD ACCUMULATORS Russian patent published in 2007 - IPC C22B13/00 C22B7/00 

FIELD: metallurgy; methods of reprocessing of the sulfate-oxide fraction (the active mass) of the lead accumulator scrap.

SUBSTANCE: the invention is pertaining to metallurgy and in particular to the method of reprocessing of the sulfate-oxide fraction (the active mass) of the lead accumulator scrap. The method provides for reprocessing of the spent lead accumulators by the desulphurization using the solution of the sodium hydroxide with the subsequent wash of the organic fraction. The utilization of the formed solutions is exercised by the electrodialysis with recovery of the sodium hydroxide and production of the sulfuric acid. The electrodialysis is exercised in the chambers of the electrodialysis apparatus with usage of the bipolar membranes at the direct-current voltage of 30 V with production of the low-mineralized water with the salt contents of no more than 0.3 g/l. The low-mineralized water from the chambers of the electrodialyzer is routed to the washing of the desulfurized active mass and other components of the accumulator scrap. The technical result of the invention is the isolation of the cycle of the utilization of the sulfate solutions formed at reprocessing of the active mass of the lead accumulators.

EFFECT: the invention ensures the isolation of the cycle of the utilization of the sulfate solutions formed at reprocessing of the active mass of the lead accumulators.

3 dwg, 1 ex