Challenge Summary
Identification of suitable application and pilot project for gainful utilization of ash by upcycling it to sand material or profitable product.
Challenge Scenario
TSPL is a coal-based power plant. Burning of coal leads to generation of ash.
Annual average ash generation at TSPL: 2.7 Mn MT.
Legacy ash accumulated over years: 3.5 Mn MT
The ash generated constitutes 1. Fly ash 2. Bottom ash 3. Legacy ash. Fly ash constitutes 80% and bottom ash constitutes 20%.
Legacy ash: Ash that cannot be reutilized and is stored in the tailing dam.
70-75% of total generated ash is currently utilized in road construction, brick kilns, cement manufacturing etc. Ash is mostly handled in the ash handling plant and stored in the tailing dam.
TSPL is looking to derive a profitable product from the legacy ash. Pilot project and quantity of the legacy ash utilized can be varied based on the proposed solutions.