| 摘要 |
The waste active-masses removed from positive and negative plates are deacidified, washed with water, air dried, and subject to: a) heat-treatment at 500 to 700 DEG C for 8 to 60 minutes, then either ground or fed into a lead-powder mill in an amount 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 mu , or b) to grinding eg. to an average particle size of less than 60 mu , then subjected to a heat-treatment at 500 to 700 DEG 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. |
