Method for preparing copper-containing solution by dissolving waste copper

Abstract

The invention relates to a method for preparing a copper-containing solution by dissolving waste copper. According to the method, the copper-containing solution is prepared by using a high-efficiency cyclone normal temperature copper dissolving device. The method comprises the following steps: feeding a copper material into a copper material stack area of a cyclone reactor by virtue of a feeding hole; conveying ozone to a gas-liquid emulsifying mixer by virtue of an ozone generator, pumping a sulfuric acid solution to the gas-liquid emulsifying mixer by virtue of an anticorrosive liquid inlet pump so as to perform emulsifying mixing on the ozone and sulfuric acid by virtue of the gas-liquid emulsifying mixer; ejecting the gas-liquid mixture mixed by the gas-liquid emulsifying mixer into the cyclone reactor along the tangential direction of the cyclone reactor, and reacting with the copper material; exhausting acid gas, water vapor and air produced in the reaction process by virtue of a waste gas exhaust port in the reaction process; and allowing the copper-containing solution prepared by the reaction to flow out by virtue of an overflow liquid outlet after the reaction, and discharging the waste residues filtered after the reaction by virtue of a waste residue outlet. The method is energy-saving, high-efficiency, easy to operate, high in oxidization speed, short in reaction time and low in waste gas emission.

Description

technical field [0001] The invention belongs to the technical field of electrolytic liquid production, and relates to a method for preparing a copper-containing solution by dissolving copper-rich raw materials such as sponge copper, waste copper, waste brass, copper foil, and waste copper wire. The method realizes the high-efficiency dissolution of the above-mentioned copper-rich raw materials at normal temperature to prepare a copper-containing solution. Background technique [0002] The copper dissolving process, also known as electrolyte preparation, is a key process in the production of electrolytic copper (electrolytic copper foil). The purpose is to dissolve the copper material into a sulfate solution to supply the subsequent electrolytic production process. Due to Cu 2+ The standard electrode potential of / Cu is 0.337V. In general, it is difficult for elemental copper to replace hydrogen ions from sulfuric acid solution to form copper sulfate solution, so the method ...

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Problems solved by technology

However, each method has its own advantages and disadvantages. Among them, the high-temperature copper-dissolving method has a fast copper-dissolving rate, but consumes a lot of energy; the low-temperature copper-dissolving method consumes less energy, but the copper-dissolving rate is low.

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