RECOVERY OF LEAD FROM ACCUMULATOR SCRAP
First Claim
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1. A method for the recovery of metallic lead from accumulator scrap comprising:
- 1. comminuting the scrap material, 2. removing coarser materials from the comminuted mass, 3. subjecting the finer materials to classification to provide a fine grain and a coarse grain fraction, 4. further comminuting the fine grain fraction from step (3) in a tube mill, 5. subjecting the lead-containing coarser materials from step (2) to a sink-float separation, 6. removing iron from the product recovered from step (5), 7. passing the resulting iron-free product to said tube mill of step (4), and 8. further classifying the product of step (7).
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Abstract
Lead accumulators or used storage batteries are coarsely ground into pieces in an impact crusher and the fine material containing metallic lead is separated and ground again and then classified. The remaining part of the coarsely ground material is subjected to a sink-flotation-separation and the fine material recovered as a sludge is introduced into a tubular vibrating mill filled with grinding bodies and ground therein, whereupon the ground material is screened and classified to recover the lead therein.
7 Citations
8 Claims
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1. A method for the recovery of metallic lead from accumulator scrap comprising:
- 1. comminuting the scrap material, 2. removing coarser materials from the comminuted mass, 3. subjecting the finer materials to classification to provide a fine grain and a coarse grain fraction, 4. further comminuting the fine grain fraction from step (3) in a tube mill, 5. subjecting the lead-containing coarser materials from step (2) to a sink-float separation, 6. removing iron from the product recovered from step (5), 7. passing the resulting iron-free product to said tube mill of step (4), and 8. further classifying the product of step (7).
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2. The method of claim 1 in which step (2) is carried out by means of wet sieve filtration.
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3. subjecting the finer materials to classification to provide a fine grain and a coarse grain fraction,
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4. further comminuting the fine grain fraction from step (3) in a tube mill,
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5. subjecting the lead-containing coarser materials from step (2) to a sink-float separation,
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6. removing iron from the product recovered from step (5),
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7. passing the resulting iron-free product to said tube mill of step (4), and
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8. further classifying the product of step (7).
Specification