Aluminium, a versatile and widely used metal, has a fascinating journey from its raw form to the final products we use every day. This blog post breaks down the aluminium supply chain, highlighting the key stages and processes involved.
1. Bauxite Mining: The Source
The journey begins with bauxite, the primary ore from which aluminium is extracted. Bauxite mining involves extracting this ore from the earth. The image indicates that approximately 6-7 tonnes of bauxite are needed to eventually produce 1 tonne of aluminium. This stage also involves various supporting industries and processes, including:
- Mining contractors
- Maintenance supplies
- Ore transportation
- Explosives
- Royalty payments and contributions to District Mineral Funds
- Corporate Social Responsibility (CSR) initiatives
2. Alumina Making: Refining the Ore
The mined bauxite ore undergoes a chemical process to transform it into alumina, a white, powdery substance. This refining stage requires approximately 2 tonnes of alumina to produce 1 tonne of aluminium. This step includes:
- Refinery operations
- Caustic soda and lime
- Other chemicals
- Power and steam
- Alumina transportation
- Maintenance supplies
3. Smelting: Extracting the Metal
Alumina is then smelted into aluminium through an electrolysis process. This energy-intensive stage is where the pure aluminium metal is extracted.
4. Casthouse: Shaping the Aluminium
The molten aluminium is alloyed and processed through casting, rolling, or extrusion to create various shapes and forms. This stage prepares the aluminium for manufacturing into final products. This stage includes:
- Smelter operations
- CP coke
- Aluminium fluoride
- Maintenance supplies
- Transport and just-in-time delivery for consumers
5. Manufacturing and Recycling
The processed aluminium is then used to manufacture a wide array of products. Importantly, aluminium is highly recyclable, and recycling returns it to the production process, creating a closed-loop system and extending its usable lifetime.
Source- https://mines.gov.in/webportal/
