Fly ash can be used to produce several goods including a type of extra-strong cement.
Fuji Cement Company (Lanka) Ltd, a part of the listed Tokyo Cement group will get an opportunity to buy 67,350 tonnes, Fine Ash (Pvt) Ltd 26,940, Sigiri Roofings (Pvt) Ltd 10,776, Ceylon and Foreign Trades 26,940, Holcim (Lanka) Ltd 17,960.
Initially eight companies had responded to the offer to sell fly ash with the highest bidder coming in at 3,500 rupees a tonne.
The procurement committee had inquired from bidder whether they would be willing to pay 3,500 rupees and five of the eight had agreed to the offer.
The annual production had been distributed to the companies in proportion to the quantities originally requested.
The fly ash from the second and third coal plants will bring revenues of 525,000 rupees a year to the Ceylon Electricity Board.
The fly ash from Sri Lanka's first coal plant is sold to Holcim Lanka, which has a cement plant nearby.Fly ash from the first plant will also be sold to other domestic industries following a request from the industries ministry at 3,500 rupees a tonne, the cabinet has decided.