Aluminum ash "zero" emission treatment technology breakthrough

Recently, Zibo Haihui Engineering Design Consulting Co., Ltd. has achieved major breakthroughs in the processing technology of aluminum ash “zero” emissions after nearly a decade of trials, research, and development, and has been fully launched into the market.

Aluminum ash arises from the melting process of all aluminum, such as aluminum electrolysis and aluminum (including recycled aluminum) processing. As the largest electrolytic aluminum country in the world with the highest production capacity and output, China's electrolytic aluminum, aluminum processing, and recycled aluminum have an annual output of more than 3 million tons of aluminum ash, plus many years of accumulation and burial. The more millions have been made.

Aluminum ash is prone to produce high-risk chemicals such as ammonia, hydrogen fluoride, and cyanide during its production and disposal. Due to the lack of social, environmental, and economic benefits, a considerable portion of aluminum ash is buried without being processed, so that not only the useful components of aluminum ash are not fully utilized, but also the environment is polluted.

On June 14, 2016, the new version of the “National Hazardous Waste List” issued jointly by the Ministry of Environmental Protection, the National Development and Reform Commission, and other departments listed aluminum ash discharged from non-ferrous metal aluminum smelting as toxic hazardous waste and flammable hazardous waste. This certainty pushes the processing and comprehensive utilization of aluminum ash to the cusp of the storm. It is extremely urgent to solve the problem of aluminum ash, especially the secondary aluminum ash (the remainder of aluminum ash after aluminum extraction).

As a private high-tech enterprise, which is committed to aluminum industry and fluorine chemical technology research and development, investment consulting, engineering design, and production line transformation. On the basis of comprehensive, systematic and in-depth investigations, Zibo Haihui Company has launched a new integrated use of aluminum ash that can achieve “zero” emissions through experiments and research, and fully absorbing and drawing on the comprehensive utilization technology of aluminum ash in China and foreign countries. New technology, and applied for a patent (a comprehensive treatment of aluminum ash, patent number .5). The technology has been applied in an electrolytic aluminum plant in Shandong, which has significant economic and environmental benefits.

The technology successfully recovers the aluminum, fluoride, halide and alumina in aluminum ash, and the alumina returns to the electrolytic cell; the fluoride, chloride, and nitride generated in the aluminum ash process are properly disposed of. Harmful gas, the technology has been verified by the user.

It is reported that this technology will process a production line of 10,000 tons of aluminum ash twice a year. The investment in project construction will be less than 10 million yuan, and the annual profit will be more than 8 million yuan. It will be able to recover all project investment after being put into production for more than one year. For enterprises, the project flow is short, investment is saved, and benefits are high.