Method for recycling lead oxide used for cathode of lead-acid cell directly from waste lead plaster
The present invention relates to a method for recycling lead oxide used for a cathode of a lead-acid cell directly from waste lead plaster. The method comprises the steps that in presence of desulfurization conditions, the waste lead plaster contact with a baric desulfurizing agent and solid-liquid...
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Format: | Patent |
Sprache: | eng |
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Zusammenfassung: | The present invention relates to a method for recycling lead oxide used for a cathode of a lead-acid cell directly from waste lead plaster. The method comprises the steps that in presence of desulfurization conditions, the waste lead plaster contact with a baric desulfurizing agent and solid-liquid separation is preformed on the mixture after the contact, so as to obtain a filtered liquid and filtered residue; and conversion reaction is performed on the filtered residue under the temperature of 350-750 DEG C, enabling lead-containing ingredients of the filtered residue to be converted to lead oxide. According to the method, a barium sulfate additive can be supplemented in a quantitative manner in a desulfurizing process, thereby realizing recycling a lead oxide raw material applicable to the cathode of the lead-acid cell directly from the waste lead plaster, greatly reducing recycling cost and energy consumption, and raising the rate of multipurpose utilization of the waste lead plaster. |
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