Equipment and method for dissolving copper in step of producing raw liquid with electrolytic copper foil
A technology of electrolytic copper foil and copper dissolution, which is applied in the direction of electrolytic process, electrolytic components, and improvement of process efficiency, etc. It can solve the problems of low direct yield index, recovery and treatment system, complex process configuration, and huge investment
Inactive Publication Date: 2005-05-04
武汉鑫星铜鑫设备技术有限公司
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At the same time, the waste gas produced by the spraying method takes away a large amount of acid mist and copper solution, resulting in a low direct yield index and the need to attach a huge recovery treatment system, resulting in complex process configuration and huge investment.
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[0029] A factory uses electrolytic copper as raw material to produce 18μm galvanized copper foil. This technology is used in the finishing process. The raw material of electrolytic copper is cut into 810×20×10 (mm) strips and put into the reactor. The composition of the solution before dissolving copper is: h 2 SO 4 110g / l, Cu 2+ 18g / l, the first start-up assists in raising the temperature to 80°C-85°C. Copper-dissolved liquid H 2 SO 4 38g / l, Cu 2+ 84g / l, copper dissolving speed up to 12.5Kg / m 3 .h, power consumption <400kw.h / 1000kg(Cu), no auxiliary heating for continuous production.
[0030] This equipment can be made of acid-resistant stainless steel, industrial pure titanium or engineering plastics.
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A method for dissolving copper in raw liquid used in production of electrolytic copper foils features that liquid-gas spray pump is used to oxygenate the solution for the emulsified mix betwen solution and air or oxygen and effectively increasing the oxidizing potential of chemicaliraction in solution, resulting in higher speed of dissolving copper in diluted sulfuric acid, increased by 8 times or more. Its equipment is composed of reactor cavity, liquid-gas spray pump, gas-liquid separator and circulating pump. The micro gas bubble layer with lower acidity is used to cover the surface, preventing the evaporation of sulfuric acid and solution, increasing output rate of copper and improving environment.
Description
technical field [0001] The invention relates to a copper-dissolving device and method for the liquid production process in the production process of electrolytic copper foil. Background technique [0002] Before the present invention was proposed, it was well known that dissolving electrolytic copper or metallic copper conforming to the production quality requirements of electrolytic copper foil into electrolyte solution was the first process of producing electrolytic copper foil. Due to Cu 2+ The standard electrode potential of / Cu is 0.337 volts, and under normal circumstances, it is impossible for elemental copper to replace H in the solution. 2 SO 4 hydrogen ions dissolved in the solution. In order to achieve the dissolution of metal copper, the method of oxidation leaching is generally adopted: [0003] <chemistry num="001"> <chem file="00114344_cml001.xml" / > < / chemistry> ... ① [0004] Realize the type ① reaction At ...
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IPC IPC(8): C25C1/12C01G3/10C25C7/00C25D7/06C25D21/00
CPCY02P10/20
Inventor 魏明星
Owner 武汉鑫星铜鑫设备技术有限公司