Sep 29, 2026Technology
Fly Ash vs Bottom Ash in Waste Incineration
The difference between fly ash and bottom ash in waste incineration, and how each is treated or recovered.
Two ash streams
Incineration produces two ash fractions: bottom ash that remains on the grate, and fly ash carried with the flue gas and captured by filtration. They have different properties and handling requirements.
Reducing fly ash at the source
Qingfeng's HRDS high-temperature flue gas treatment reduces fly ash output by over 30% compared with traditional systems, reducing reagent use and treatment cost.
Recovering bottom ash
Bottom ash is processed through screening and magnetic separation to recover scrap iron, and the remainder is turned into recycled aggregates for roads, plazas, dikes and other infrastructure.
