Aluminium is one of the most recycled metals in the world. However, the recovery process generates a complex byproduct known as aluminium dross. Also referred to as salt slag or skimmings, this residue poses both environmental challenges and opportunities for circular economy solutions.
This article kicks off a technical series focused on aluminium dross recycling, covering its generation, processing methods, metal recovery, and secondary waste management.
Below you will find a thematic index that will serve as a guide for our upcoming articles: you will be able to access them through the “+info” button as they are published.
1. What is aluminium dross?
Definition and types: black dross, white dross, salt slag
Origin in melting and refining processes
Typical chemical and physical composition
+info
2. Why recycle aluminium dross?
Environmental impact of untreated dross
Economic value of recovered aluminum
Applicable environmental regulations and standards
+info
3. Processing technologies
Mechanical processes: crushing, size separation
Thermal processes: pyrometallurgy, controlled oxidation
Hydrometallurgical processes: leaching, salt treatment
+info
4. Metallic aluminium recovery
Separation and refining methods
Recovery efficiency and influencing factors
Quality of recovered aluminum
+info
5. Pretreatment and recovery of dross
Stages of the process
Technical and economic benefits
Sustainability and added value
+info
6. Oxides and salt cake management
Oxide residues from mechanical pretreatment
Salt cake (salt slag) from rotary furnace operations
Zero-waste aluminium recycling
+info
7. Economic viability and case Studies
Operating costs vs. material value recovered
Success stories from industrial recycling plants
Global trends and innovation opportunities
+info
In the coming articles, we will delve deeper into each topic, highlighting industrial practices, technical hurdles, and sustainable innovation opportunities.
Interested in this topic? Subscribe through the following form: we will notify you every time we publish a new installment of this series dedicated to one of the key processes in the recycling of non-ferrous metals.
