Method for improving copper dissolving efficiency by using oxygen rich waste acid gas of electrolytic copper foil

An electrolytic copper foil and oxygen-enriched technology, which is applied in the electrolytic process, electrolytic components, electroforming and other directions, can solve the problems of affecting the speed of molten copper, environmental hazards, and reducing the temperature of the molten copper tower, which is beneficial to environmental protection and improves production efficiency. , the effect of speeding up the dissolution rate

Inactive Publication Date: 2011-11-09
梅州市梅县区金象铜箔有限公司
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Problems solved by technology

These gases are mixed together to form the oxygen-enriched waste acid gas at 32°C in the production process of electrolytic copper foil. At present, this oxygen-enriched waste acid gas is sucked into the acid mist purification tower by the exhaust fan and then discharged into the atmosphere, causing certain damage to the environment. harm
[0004] In winter, the air temperature is low, sometimes even below zero. Such low air entering the copper melting tower will greatly reduce the temperature in the copper melting tower, and the melting copper must be kept at a temperature of 60°C, which seriously affects the copper melting speed. It may even cause crystallization of copper sulfate due to low temperature, resulting in failure to produce

Method used

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  • Method for improving copper dissolving efficiency by using oxygen rich waste acid gas of electrolytic copper foil
  • Method for improving copper dissolving efficiency by using oxygen rich waste acid gas of electrolytic copper foil

Examples

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Embodiment 1

[0018] refer to figure 1 , at room temperature, to a capacity of 88m 3 (The actual effective capacity is 70m 3 ) into the spray-type copper-dissolving tower 1 of 40-50 t of copper wire 7, through the PVC material insulated conveying pipeline, the 30 ℃ oxygen-enriched waste acid collected at 0.1mPa is passed into the copper-dissolving tower 1 from the bottom of the sieve plate 2 Gas, the raw copper wire is in contact with the oxygen in the oxygen-rich waste acid gas, so that the surface of the copper wire is always in an oxidized state, because the oxygen content of the copper melting tower 1 is about 3% higher than the oxygen content directly fed into the air , which is conducive to the generation of copper oxide; the copper sulfate aqueous solution is sprayed on the copper wire 7 through the spray pipe 3 from the top of the copper dissolving tower 1 with a pump, and the copper sulfate aqueous solution and the oxygen-enriched waste acid gas are alternately on the surface of t...

Embodiment 2

[0020] refer to figure 1 , at room temperature, to a capacity of 88m 3 (The actual effective capacity is 70m 3 ) into the spray-type copper-dissolving tower 1 with 40-50t of copper wire 7, through the PVC material insulated delivery pipeline, the 35°C oxygen-enriched waste acid collected at 0.05mPa is passed into the copper-dissolving tower 1 from the bottom of the sieve plate 2 Gas and 0.05mPa air, the raw copper wire is in contact with the oxygen in the oxygen-rich waste acid gas, so that the surface of the copper wire is always in an oxidized state, because the oxygen content of the copper-dissolving tower 1 is higher than the oxygen content of the air directly Increased by about 2%, this is conducive to the generation of copper oxide; the copper sulfate aqueous solution is sprayed on the copper wire 7 through the spray pipe 3 from the top of the copper dissolving tower 1 with a pump, and the copper sulfate aqueous solution and the oxygen-enriched waste acid gas alternatel...

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Abstract

The invention discloses a method for improving copper dissolving efficiency by using oxygen rich waste acid gas of an electrolytic copper foil, aims to provide a method for improving copper dissolving efficiency by returning oxygen rich waste acid gas produced in the copper foil electrolysis process to a copper dissolving tower, and belongs to the technical field of metal dissolution. According to the method, after the oxygen rich waste acid gas generated in the electrolytic copper foil production process is collected, the oxygen rich waste acid gas is directly introduced into the copper dissolving tower through a delivery pipeline and used as an oxygen source or a partial oxygen source for dissolving copper. By the method, the oxygen rich waste acid gas is effectively utilized, the waste is changed into valuable, the dissolving speed of metallic copper is quickened, the production cost of the copper foil is reduced, the production efficiency is improved, the energy is saved, and the environment is protected.

Description

technical field [0001] The invention relates to a method for dissolving copper, in particular to a method for improving the efficiency of dissolving copper by using the oxygen-enriched waste acid gas of electrolytic copper foil, and belongs to the technical field of metal dissolving. Background technique [0002] Electrolyte preparation, also known as the copper dissolving process, is the first process in the production of electrolytic copper foil. The purpose is to dissolve the electrolytic copper plate into a copper sulfate solution. The metal copper is contacted with the sulfuric acid solution and oxygen to dissolve the metal copper to form a copper sulfate solution under the condition of maintaining the temperature of 60°C, which flows out from the sieve plate hole of the copper dissolving tower to the solution lower tank. Metal copper reacts with oxygen in sulfuric acid solution at 60°C to form copper oxide, and then copper oxide reacts with sulfuric acid to form copper...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D1/04C25D21/00
Inventor 黄国和陈优昌王祟华李建伟杨雨平谭良锋叶敬敏付文锋吴红兵
Owner 梅州市梅县区金象铜箔有限公司
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