METHOD OF RECOVERING LEAD FROM OXYSULPHATE SLUDGE OF STORAGE BATTERIES Russian patent published in 2019 - IPC C22B13/02 C22B7/04 

FIELD: metallurgy.

SUBSTANCE: invention relates to metallurgy of non-ferrous metals and can be used in recovery of lead from oxysulphate sludge (OSS) of lead of lead-antimony electrode grids of accumulator scrap. Lead is reduced from oxysulphate sludge of accumulator batteries in molten caustic soda at addition of sodium sulphide at weight ratio of OSS:NaOH:Na₂S, equal to 100:(15–16):(75–100), and temperature of 500–550 °C for 40–45 minutes.

EFFECT: method provides high reduction of lead to metallic phase (more than 99 %) with high quality of obtained metal, simplification of process.

1 cl, 1 ex