Process for recovery of the constituent materials from lead acid batteries
First Claim
1. A method of recovering the paste material in grid groups from lead acid batteries comprising:
- removing and separating the grid groups and any paste material attached thereto from the battery case and any mud, containing various sulphated compounds of lead contained therein;
causing the release of paste material from the grid groups in particulate form into a liquid mixture by agitating the grid groups in a liquid;
separating the particulate paste material from the liquid.
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Accused Products
Abstract
A process and apparatus for recovery of constituent materials from lead acid batteries is shown in which the battery is dismantled in a stepwise procedure under which the materials are separated, not mixed and in particular in which the grid groups are removed from the battery case and processed in a liquid, preferably water, by hydrodynamic and mechanical agitation to cause the paste material to be freed from the grids and enter the water as a mixture of fine particles while the lead grid pieces drop to the bottom. The process does not require burning or chemical reaction and can selectively recover all constituent materials including, without limitation, high quality marketable lead dioxide from the paste material.
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Citations
29 Claims
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1. A method of recovering the paste material in grid groups from lead acid batteries comprising:
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removing and separating the grid groups and any paste material attached thereto from the battery case and any mud, containing various sulphated compounds of lead contained therein; causing the release of paste material from the grid groups in particulate form into a liquid mixture by agitating the grid groups in a liquid; separating the particulate paste material from the liquid. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method of recovering constituent materials from lead-acid type batteries;
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draining the battery; cutting the cover off the battery; removing the grid groups from the battery case; causing the paste material in the grid groups to become mixed in particulate form in a liquid mixture by agitating the grid groups in a liquid. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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26. The method of recovering constituent materials from lead-acid batteries comprising;
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draining the battery; cutting the cover off the battery; separating the grid groups from the battery case; providing a separator comprising a mixing area; delivering the grid groups into the separator mixing area; delivering an aqueous liquid into the separator mixing area; agitating the grid groups in the aqueous liquid to cause paste materials in the grid groups to be mixed with the aqueous liquid; removing liquid mixture from the mixing area; delivering the mixture of paste materials and aqueous liquid to a settling area; and allowing the paste materials to settle out of mixture with the aqueous liquid. - View Dependent Claims (27, 28, 29)
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Specification