News and Announcements
Completion of Bankable Feasibility Study (BFS) by Altech Chemicals
- Published July 27, 2015 10:23AM UTC
- Publisher Wholesale Investor
- Categories Company Updates
24th July 2015, Altech Chemicals
Our Vision
To be a world leading producer of high purity alumina (HPA)
Sapphire Gemstone
- Sapphire & Ruby – natural form of high purity alumina (HPA)
- Formed by mother nature like diamonds
- Colour from impurities
- Extremely hard – no. 9 on Mohs scale
- Third hardest mineral behind diamond
- Scratch-resistant artificial sapphire glass made from HPA
What is HPA?
- Purified alumina (Al2O3)
- Greater than 99.99% (4N) purity
- Maximum allowable impurities of 100ppm
- Smelter Grade Alumina (SGA) ~ 99.5% (5,000 ppm impurities mainly sodium)
- Bayer Process uses sodium hydroxide (NaOH)
- Sodium impurity is problem for electronics industry
SGA – Smelter Grade Alumina
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