Method of recovering lead and lead compounds from discarded lead storage batteries
AssigneeHazemag Dr. E. Andreas KG
InventorsEberhard Huwald, Rolf Konig
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Abstract
Scrapped storage batteries are first preliminarily crushed to discharge acid from individual cells, thereupon rinsed by alkaline water, crushed in a hammermill and simulataneously dried by a stream of hot air; noncrushed lead pieces are discharged separately from the hammermill and the remaining crushed material is discharged in dry condition from the mill and classified into two fractions, namely a coarse lead fraction and a second fraction consisting of fine particles of lead compounds mixed with coarser pieces of plastic material.
Claims10
A method of recovering lead and lead compounds from scrapped storage batteries, comprising the steps of preliminarily crushing the batteries to discharge acid therefrom;
- rinsing the crushed pieces by a minimum amount of a liquid preferably alkaline water;
- further crushing the coarsely crushed pieces while simultaneously drying the same at a relatively low temperature at which only a negligible amount of the residual acid is vaporized;
- and thereafter classifying the crushed dry material into the coarse lead fraction, a fraction of fine lead compounds and remaining materials of low specific weight, mostly plastics.
Dependencies are inferred from the claim text.