Aluminium Metallurgy (55x90cm)
Description
The “Aluminium Metallurgy” chart (55×90 cm) is an educational poster illustrating the stepwise extraction and purification processes for aluminium, commonly used in science classrooms and laboratories.
Key Features and Content
Size and Format: 55×90 cm, multicolor and laminated for classroom durability and visual clarity.
Main Content Sections:
Ores and Raw Materials: Bauxite (primary ore of aluminium) and its chemical composition (mainly Al₂O₃·2H₂O).
Bayer Process (Refining): Flowchart or illustrated process showing:
Crushing and grinding bauxite
Treating with caustic soda (NaOH) at high pressure to dissolve alumina, leaving red mud as a by-product
Precipitating aluminium hydroxide, then heating to obtain pure alumina (Al₂O₃).
Hall-Héroult Process (Electrolytic Reduction):
Electrolytic cell diagram: Alumina dissolved in molten cryolite (Na₃AlF₆)
Passage of electricity to reduce Al₂O₃ into aluminium metal (collects at cathode) and oxygen (released at anode)
Major reaction:
2
Al
2
O
3
+
3
C
→
4
Al
+
3
CO
2
2Al
2
O
3
+3C→4Al+3CO
2
.
Purification and Casting: Molten aluminium tapped off, further refined, cast into ingots, and readied for industrial use.
Physical and Chemical Properties: Summarizes key properties and applications of aluminium metal.
Visual Aids: Includes technical diagrams, reaction equations, and flow arrows for each process step.
Educational Highlights: Emphasizes energy-intensive nature, selective chemical reactions, and industrial application spectrum.
Educational Value
Focuses on both the chemistry and large-scale engineering involved in making aluminium.
Suitable for high school and undergraduate chemistry or materials science classes.
This chart is a comprehensive and easy-to-understand teaching tool for illustrating modern aluminium metallurgy, from ore to finished product.
Specifications
| Model No. | N-C059 |
|---|
