The plant, which is owned by Vinacomin, was built by Chalieco, a subsidiary of Chalco, otherwise known as the state-owned Aluminium Corporation of China.
Plant capacity will increase to 500kt/yr in 2013 and 615kt/yr by 2014.
The Nhan Co alumina project in the Central Highlands province of Dak Nong, has also been developed by Vinacomin and is expected to have an initial output of 300kt/yr in 2014 and 650kt/yr by 2016.