金属回収装置の洗浄方法

Abstract

To solve the problem that metal precipitated by electrolysis contains storing acid, and is not easily treated.SOLUTION: A method for cleaning a metal recovery device for generating a spongy metal porous body composed of metal particles precipitated in a storage tank by electrolysis and hydrogen fine air bubbles and thereby recovering metal in an ionic state includes the steps of: holding the metal recovered by the filter of the recovery device, and spraying cleaning water from a cleaning water source from above the storage tank in a state in which a solution is discharged; receiving and storing the cleaning water below the filter, and adding the cleaning water as return cleaning water to cleaning water above the storage tank; and stopping the spraying when the pH of the return cleaning water is in a range of a prescribed reference value, and neutralizes the pH of the metal recovered by the metal recovery device.SELECTED DRAWING: Figure 1

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