Method for preparing copper sulfate solution for electrolytic copper foil by dissolving waste copper wire

Abstract

The invention discloses a method for preparing a copper sulfate solution for electrolytic copper foil by dissolving a waste copper wire. The method comprises the following steps: rolling the waste copper wire into a copper sheet with the thickness of less than 0.50 mm by using a rolling mill, dipping the copper sheet into dilute sulphuric acid with the concentration of 5-50%, enabling the temperature of the solution to be 10-95 DEG C, introducing air, pure oxygen or oxygen-enriched gas with the O2 content of more than 30% in a manner of dispersing a nano template, after complete dissolution, discharging copper slag into a washing tank for washing through a discharging pipe, enabling a copper liquid to enter a copper sulfate liquid storage tank from a liquid discharging branch pipe and a liquid discharging main pipe, and filtering the copper sulfate liquid to obtain the copper sulfate liquid for electrolytic copper foil. The dispersion nanometer template is arranged at the bottom of the dissolving tank, bubbles are split into micro-bubbles by the dispersion nanometer template, and the micro-bubbles of oxygen are in uniform contact with a copper material under the rising action of the bubbles so that the copper dissolving efficiency is improved; and the leached copper liquid is directly pumped out from the bottom through the liquid discharging pipe, the copper slag is directly discharged into the washing tank through the discharging pipe, operation is easy and convenient, the technological process continuity is high, and automatic continuous production is easy to achieve.

Description

technical field [0001] The invention relates to the technical field of electrolytic copper foil production, in particular to a method for preparing copper sulfate solution for electrolytic copper foil by dissolving waste copper wires. Background technique [0002] In the production process of electrolytic copper foil, electrolytic copper foil is formed by electroplating from copper sulfate electrolyte. The dissolution of copper is the first process. The traditional copper dissolution process is to grind high-grade copper into powder The solution reacts to produce a copper sulfate solution. However, due to the lack of copper resources in my country, a large amount of copper recycling waste, such as discarded copper wires, must be used in production. Copper in this part of copper scrap exists in the state of metal, and copper has good ductility. Therefore, some copper scrap cannot be ground by grinding in copper hydrometallurgy, but can only be ground by acid leaching. For r...

AI Technical Summary

Problems solved by technology

The existing copper dissolving device mainly has the following defects: 1. During the soaking process of dissolving copper, metal copper material often accumulates at the bottom of the reaction tank, causing oxygen to be unable to fully contact the copper material, resulting in slow reaction speed and low equipment efficiency; 2. When blowing air directly to dissolve copper, because the blown air is not easy to disperse and dissolve, the blown air bubbles are large, and the contact with the copper material is uneven, and the efficiency is also low; 3. Because the utilization rate of air is too low, As a result, the copper dissolution rate is slow, the heat release efficiency is low, and the huge temperature difference between replenishment and discharge causes the solution temperature to gradually drop, and the solution needs to be continuously heated to maintain a high-efficiency reaction temperature; It can be pulled out from the upper part, the operation is complicated, the continuity of the process flow is poor, and it is not easy to realize automatic continuous production

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