New process for separating metal fiber copper protective layer by catalytic ammonia leaching method

Abstract

A catalysis ammonia leaching process for separating copper protective layer on metal fiber, which contains 1, oxidizing copper protective layer by reacting with oxygen in air through electrochemical reaction, adding carbonized ammonia for high speed complexing copper layer to producing copper carbonate ammonia complex, 2, heating produced copper carbonate ammonia complex to separating hydrous copper oxide or basic copper carbonate and carbonized ammonia gas, 3, cooling carbonized ammonia gas into carbonized ammonia, and circular acting to copper protective layer. Said invention has advantages of low cost, environment protection and high productivity.

Description

technical field [0001] The invention relates to a new process for separating the metal fiber copper protective layer by a catalytic ammonia leaching method. The metal fiber copper involved in the invention is mainly used in the fields of aerospace, chemical industry, electronics, textiles and the like. Background technique [0002] As a high-tech product, metal fiber is widely used in many fields such as aerospace, chemical industry, electronics, textiles, etc. This kind of application is developing into more fields with the advancement of technology. For example, people are currently applying it in the field of clothing as anti-static clothing, in the chemical industry as metal filters, in the industrial field as pipeline equipment, in the military field as body armor, and so on. The metal fiber is composed of nickel-chromium-aluminum and other alloys. In the process of producing metal fiber, it needs to be protected by 60% electrolytic copper before it can be drawn into a ...

AI Technical Summary

Problems solved by technology

At present, the process methods for treating metal fiber copper protective layer include electrolysis and nitric acid method. The electrolysis method has a large investment and high cost, and the acid mist generated is difficult to handle. The generated nitrogen oxide and other gases are difficult to cure, the treatment cost is high, and the degree of environmental protection is poor

Furthermore, electrolysis and nitric acid can be used to dissolve and recycle the copper protective film, but these two methods have a certain impact on the physical and chemical properties of the metal fiber, resulting in a decline in the quality of the metal fiber

But at present, there is no good process method that can make up for the shortcomings of the electrolysis method and the nitric acid method. Therefore, what process method to use to treat the metal fiber copper protective layer has always been a major problem that plagues the metal fiber manufacturing industry.

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