By setting up cement projects to make use of the fly ash generated from their power plants, Indian utilities such as NTPC Ltd and Reliance-Anil Dhirubhai Ambani Group’s Reliance Power Ltd (RPL) will also be able to use their project land for more productive purposes by cutting down on storage areas.
Fly ash is generated while burning coal. One tonne of cement can take an input of 0.2 tonne of fly ash. Not only is the cost of cement produced from fly ash 5-10% lower when compared with cement produced the traditional way, but it also saves on transportation and disposal of a material considered detrimental to the environment.
“Fly ash needs ash dykes for storing. A 1,000MW project requires around 1,000 acres for ash dykes for a 25-year period. This benefit is in addition to leveraging the production of fly ash for cement manufacturing,” said a senior official at the Central Electricity Authority, the apex power sector planning body in the country.
While RPL plans to set up a 2.0 million tonnes per annum (mtpa) cement plant near Satna in Madhya Pradesh at an investment of Rs10,000 crore, NTPC plans to manufacture cement near six of its power plants through joint ventures.
RS Sharma, chairman and managing director of NTPC, said: “Using fly ash for cement production will definitely help in better land utilization. The amount of land savings will depend on the size of the cement manufacturing facility, which in turn will determine the amount of fly ash utilization. Around 30-40% of the land required for the power project goes towards ash handling.