FOERFARANDE FOER ATT FRAMSTAELLA AKTIV MASSA MED FOERBAETTRAD KVALITET AV AVFALLSAKTIVMASSA FRAON BLYACKUMULATORER HAERSTAMMANDE FRAON AVSTJAELPNINGSPLATSER.

摘要

The present invention relates to a process for working up waste active-mass of consumed, broken accumulator plates, deriving from rubbish-shoots, into active mass, wherein the waste active-masses removed from positive and negative plates are deacidified, washed with water, separately stored and then subjected to heat-treatment. According to the process of the invention the air-dry positive or negative active-mass or the mixture thereof is subjected a) to heat-treatment at a temperature of 630 degrees to 700 degrees C. for 8 to 60 minutes, then either ground in a manner known per se or fed into a lead-powder mill in an amount of at most 80% by mass, calculated on the mass of the lead charged into the mill, and in both cases ground to an average particle size of less than 60(my), or b) to grinding in a manner known per se, preferably to an average particle size of less than 60(my), then subjected to a heat-treatment at a temperature of 630 degrees to 700 degrees C. for 8 to 60 minutes, then from the thus-obtained material positive or negative active-mass is prepared when positive or negative active-mass was used as starting material, or negative active-mass is prepared when a mixture of positive and negative active-masses was used as starting material.