Electrolytic cell with large contact specific surface area for valuable metal recovery

Abstract

The invention relates to an electrolytic cell which can effectively electrodeposit recyclable valuable metal in gold-plated wastewater or valuable metal-containing wastewater for recovery, in particular to an electrolytic cell with a large contact specific surface area for valuable metal recovery, which increases the specific surface area of an electrode contacted by the electrolyzed wastewater to the greatest extent, improves the electrolysis efficiency, expands the electrolysis space and effectively electrodeposits and recovers the valuable metal in low-concentration wastewater. In the electrolytic cell for eletrodepositing the valuable metal in the wastewater through electrolytic reaction by using a cathode and an anode, a shell, an anode assembly and a cathode assembly are arranged, wherein the shell is provided with a flow inlet, a flow outlet and an exhaust hole and has an internal space; the anode assembly covers the internal space and is provided with a plurality of anodes; the cathode assembly is arranged between the anodes by covering the internal space and partitions the internal space into two electrolysis spaces; and ball-like cathode steel wires are arranged on one side of each electrolysis space so as to increase the specific surface area contacted by the wastewater. The wastewater flowing in from the flow inlet passes through a plurality of electrolysis spaces in turn, the valuable metal is electrodeposited on the cathode assembly for coagulating the cathode steel wires to be recovered, and gas is discharged out of the exhaust hole, and the wastewater is discharged to the exterior through the flow outlet.

Description

technical field [0001] The invention relates to an electrolytic cell for effectively electrodepositing reusable valuable metals in gold-plating wastewater or wastewater containing valuable metals for recovery, and in particular to an electrolytic cell that maximizes the contact of electrolytic wastewater. The specific surface area of ​​the electrode can improve the electrolysis efficiency and expand the electrolysis space. It can also effectively electrodeposit and recover valuable metals in low-concentration wastewater. Background technique [0002] In general, valuable metals are recycled from scraps of electronic parts (Scrap) including Printed Circuit Boards used in various electronic products, waste catalysts produced in chemical plants, etc., or in de-plating plants, fiber The wastewater from other factories other than the factory and the wastewater generated during photo development contain a large amount of heavy metals, so the reuse of this wastewater and the effect...

AI Technical Summary

Problems solved by technology

However, in the existing cathode of this steel ball structure, the shape of the polymer compound (plastic) is used to make it, and the metal with high conductivity, such as copper (Cu), etc., is coated on its surface in order to improve the conductivity. its making very difficult problem

[0015] In addition, such an electrode coated with a metal with high conductivity on the surface, in the electrolysis process for recovering valuable metals, the above-mentioned coated metal is produced by the additives (citric acid, detergent, etc.) Dissolved and thus spit out as an impure substance, which causes a problem of lower overall electrolysis efficiency

[0016] Moreover, the waste water flowing into the electrolytic cell 100 has properties such as neutrality, alkalinity, and acidity according to its properties, and the metals coated on the electrodes are dissolved by the pH of the waste water flowing into the electrolytic cell 100. Becomes a problem point that reduces electrolysis efficiency

[0017] As a result, these electrodes are not reusable after recovering valuable metals once, but only as a one-time use, so there is a problem that they must be replaced

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