Elemental Separation and Utilization Technology Helps Turn Aluminum Ash into Waste

Aluminum ash is usually classified according to form, such as aluminum slag or aluminum ash, especially secondary aluminum ash, which means that after the metal aluminum is extracted from the aluminum slag, it is milled by a ball mill and sifted. Metal aluminum is sieved out to achieve metal aluminum extraction, leaving a small amount of aluminum aluminum in the remaining aluminum ash. According to the refining method, two types of aluminum ash can be produced: one is the aluminum ash of the electrolytic aluminum liquid. The electrolytic aluminum liquid aluminum ash comes from pure aluminum liquid, and its composition is mostly aluminum oxide, aluminum nitride, and a small amount of fluoride. The second is aluminum alloy casting aluminum ash. Due to the presence of elements such as silicon, magnesium, copper, iron, and zinc in the aluminum alloy solution, the alloy aluminum ash contains various metal impurity elements and a small amount of fluoride.

For aluminum processing companies, aluminum ash is generally discarded directly or exported at a low price. However, as a dangerous solid waste, aluminum ash will be extremely polluted if it is discarded at will. In the past two years, the state has conducted strict supervision on this issue. Therefore, how to effectively use aluminum ash, reduce pollution, and increase the utilization rate has been a key research direction for many companies.

Zhengzhou Zhong Lv Environmental Protection New Material Co., Ltd. has carried out research on aluminum ash treatment and comprehensive utilization technology for many years. The use of mineral processing, alumina smelting, chemical engineering, environmental protection and other multidisciplinary technologies to achieve the separation and use of aluminum and ash elements, first separate the aluminum ash ammonia, fluoride, slag agent, aluminum nitride and other substances, and then deal with the degree of activity is not The same alpha-alumina, beta-alumina, aluminum hydroxide and other substances, and then deep separation of aluminum, ash, magnesium, copper, iron, chromium, zinc and other elements, through the continuous R & D team in Zhengzhou Zhonglv company Efforts have finally been made to develop and develop aluminum ash treatment and comprehensive utilization technologies, and have obtained national invention patents (a method for the comprehensive utilization of aluminum ash, Patent No. X). On the basis of this technology, China National Green Materials Co., Ltd. will expand the test facilities and join other companies in the construction of industrial test production lines that will perform key processes for the treatment and utilization of aluminum ash. According to the experimental results, through the harmless and comprehensive utilization of 200kg/h aluminum ash, and continuous and stable operation for 168 hours, the obtained aluminum ash treatment results meet the national environmental protection standards, and the recycled aluminum hydroxide and ammonia water meet non-ferrous metals. Industry raw material standards.

It is understood that the total investment of the project is 20 million yuan, and the aluminum ash processing capacity can reach 10,000 tons/year, and about 1,000 to 1,500 tons of metal aluminum scrap and 8,500 to 10,000 tons of aluminum hydroxide can be obtained, and the nitrogen in aluminum ash can also be effectively recovered. . This separation method is not only applicable to the treatment and treatment of electrolytic aluminum ash, but also applicable to aluminum-processed aluminum ash and secondary aluminum ash with complicated composition and intractability.

At present, Zhengzhou Zhonglu Environmental Protection New Material Co., Ltd. has signed cooperation documents with electrolytic aluminum companies in Xinjiang, Shandong, and Gansu, and a regenerated aluminum company in Henan, etc., and has achieved a wide range of response throughout the country, helping the harmless treatment of aluminum smelting waste residue. Recycling and recycling technologies have reached new heights.