Method for melting copper at low temperature and copper melting device

Abstract

The invention discloses a method for melting copper at low temperature. A copper melting device is involved. The copper melting device comprises a circulating gas pipeline, a heat exchanger, an acid-resistant water pump, a high-pressure acid-resistant air pump, an air filter, a liquid level sensor and a copper melting tank, wherein a feeding port, an acid spray pipe and a filter plate are sequentially arranged from top to bottom in the copper melting tank. The method specifically comprises the following steps of: 1) preparing raw materials; 2) adding a copper material; 3) filtering air, feeding into the copper melting tank, rising, and reacting with the copper material to obtain copper oxide; 4) spraying a solution of dilute sulfuric acid by using the acid spray pipe and reacting with the copper oxide to obtain a solution of copper sulfate; and 5) discharging the solution of copper sulfate through the filter plate. The method for melting the copper at low temperature is easy to operate, and is high in copper melting efficiency, low in discharge loss and low in pollution, and steps are simple; and the copper melting device used by the method has a simple structure and industrialized production is easy to realize.

Description

technical field [0001] The invention belongs to the technical field of electrolysis, and in particular relates to a copper-dissolving method and a copper-dissolving device. Background technique [0002] Copper sulfate is a commonly used raw material in the production of electrolytic copper foil. At present, most of the technical principles for the preparation of copper sulfate are: (1) reacting elemental copper with oxygen to generate copper oxide: 2Cu+O 2 ==2CuO, (2) Copper oxide reacts with sulfuric acid to generate copper sulfate: CuO+H 2 SO 4 ==CuSO 4 +H 2 O. This is the molten copper technology. The most basic factors for dissolving copper are: temperature, contact area between copper material and acid, oxygen supply and stirring diffusion, etc. Therefore, copper dissolving equipment is a key factor affecting the preparation of copper sulfate. Commonly used copper melting equipment has a copper melting tank. The copper melting tank is the key copper melting equi...

AI Technical Summary

Problems solved by technology

One of the traditional copper melting tanks uses high temperature (about 70°C) to dissolve copper to obtain rapid copper dissolution. However, since the temperature required for the process is mostly around 55°C, the heat energy consumption is extremely high when the temperature is reduced from 70°C to 55°C. The corrosion of the pipeline is also large, which leads to high cost of copper foil products and a decline in the market competitiveness of enterprises; another commonly used method is copper melting at a low temperature of about 55°C, which not only easily causes air duct blockage, but also produces a large amount of water and acid. Exhaust gas not only affects the ability to dissolve copper, but also causes environmental pollution

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