ScotAsh Upgrading of Power Station Waste
Improve the quality of fly ash to allow its use in higher-value cement product.
Pulverised fuel ash has been sold by power plants to the construction industry for many years as a low-value product. The cement industry is ideally placed for this example of industrial ecology. It traditionally uses large volumes of primary extracted raw materials that cannot be sourced sustainably, but also uses chemistry compatible with a wide range of raw materials.
ScotAsh, a joint venture between ScottishPower and Lafarge cement has developed methods to upgrade the ash for use in advanced cement products. Using electrostatic separation to remove carbon from the ash, and large storage facilities to even out quantity and quality of product across the year, ScotAsh now has a rapidly growing business.