Innovation in Aluminum Dross Processing: Comprehensive Strategies for Safe Disposal and Efficient Utilization in...

Area of Science:

• Environmental Science
• Materials Science
• Industrial Chemistry

Background:

• Aluminum production generates hazardous aluminum dross annually.
• This waste contains harmful substances (e.g., aluminum nitride, fluoride, chloride) and valuable resources (metallic aluminum, alumina).

Purpose of the Study:

• To review sources, composition, and environmental/health hazards of aluminum dross.
• To focus on harmless treatment and resource utilization technologies for aluminum dross.

Main Methods:

• Summarizes existing literature on aluminum dross.
• Classifies harmless treatment into hydrometallurgical and pyrometallurgical methods (denitrification, defluorination, dechlorination).
• Details resource utilization for primary aluminum dross (PAD) and secondary aluminum dross (SAD).

Main Results:

• PAD is primarily used for metallic aluminum extraction (heat/cold treatment).
• SAD is utilized in refractory materials, building materials, water treatment agents, and alumina extraction.
• Various treatment technologies offer different advantages and disadvantages.

Conclusions:

• Effective treatment and utilization of aluminum dross are crucial for environmental protection.
• Future research should focus on optimizing current technologies and developing innovative solutions for sustainable aluminum industry development.