Aluminum dross does not contain strong acidic substances, but it does contain an alkaline solution formed by the reaction of aluminum nitride with water, which generates ammonia gas. The pH value of this solution ranges between 8 and 10. According to relevant standards, solid waste is considered corrosive when the pH value is ≥12.5 or ≤2.0.Aluminum dross does not exhibit corrosive characteristics.
Indeed, although aluminum dross does not have corrosive characteristics, it possesses a dangerous attribute when it comes into contact with water. This reaction involves the interaction between aluminum nitride and water, resulting in the formation of aluminum hydroxide and ammonia. Experiments have shown that the amount of ammonia gas released from the reaction of aluminum dross with water is considerable. Ammonia is a irritant gas, and if its concentration in the air is too high, it can cause harm to human health and may even be fatal in severe cases. The release of ammonia gas poses certain risks to both the ecological environment and human health. The main toxic substances contained in aluminum dross are fluorides, chlorides, etc. Toxic leaching tests indicate that the leaching concentrations of fluorides and chlorides from aluminum dross are higher than the standard limits, indicating leaching toxicity.
Aluminum dross can also be applied in various fields such as steelmaking slag-forming agents, covering agents for electrolytic aluminum cells, the cement industry, abrasive materials, fertilizers, and printing, bringing considerable economic benefits to aluminum processing enterprises. The recycling and treatment technology for aluminum dross in our country started late, and the equipment and processes are relatively backward. Many enterprises simply use manual sorting and cooling followed by direct sales, which not only involves high labor intensity and serious pollution but also results in low recovery rates and significant waste, causing various health damages to workers. However, in recent years, with the implementation of various national policies and the enforcement of mandatory bans, many polluting enterprises will be prohibited from production.
ZK Corp is capable of providing equipment and technology for the processing of aluminum dross, including high-quality aluminum dross ball mills, aluminum dross rotary kilns, and other equipment, which can achieve efficient utilization of aluminum dross. In the face of global energy shortages and prominent environmental pollution issues, as well as the increasingly fierce competition in the aluminum processing industry, the disposal of aluminum dross follows the principles of harmlessness, reduction, and resource utilization.
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