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Ash Utilisation

Welcome to Eskom Rotek Industries, your partner in the purchasing of coal combustion products.​
Eskom Rotek Industries is a wholly owned subsidiary of Eskom Enterprises, which in turn forms part of Eskom Holdings. Eskom is home to 14 active  coal-fired power stations with an additional station still under construction, which consume an estimated 120 million tons of coal per year, resulting in the production of about 36 million tons of ash.
Ash is generated in the combustion of pulverised coal in a coal-fired power station. The ash produced is used not only for commercialisation, but also complies to legislative requirements in using ash for effluent management.
Due to the way in which our power stations burn coal, there is more than one type of ash that is produced on the power station. Each of the differing ash classification contains different particles and molecules and can be used for various different opportunities

This Picture is provided by Sephaku Cement.

Coal received from the mine is ground to a fine powder, mixed with air and blown into a furnace where it burns spontaneously. The combustion of coal generates heat. The generated heat is used to convert water into steam at a very high temperature and pressure. The steam drives a turbine that rotates a shaft coupled to a generator that produces electricity. Ash is generated during the combustion process. Fly Ash transport with flue gasses and settled out in the precipitator. Large ash particles (Bottom ash) collect on the floor of the combustion unit. Fly and bottom ash is evacuated from the power station via a conveyance system and disposed of at the station’s ash disposal facility or recycled.
​     ​ ​Clinker Ash

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    ​Cenospheres​​ Ash ​ ​
Eskom is a member of the South African Coal Ash Association (SACAA), which is strategically aimed at promoting and encouraging the utilization of Coal Combustion Product’s where it is technically feasible, sustainable and economically viable.  For more information on the SACAA, please click on the following link:
South African Coal Ash Association: