The phrase "ash residue" is correct and usable in written English.
It can be used to refer to the leftover material that remains after something has been burned, often in contexts related to combustion or incineration.
Example: "After the campfire had died down, we were left with a pile of ash residue that needed to be cleaned up."
Alternatives: "burnt remains" or "charred residue."
Both samples were ashed for about 4 h until a white or grey ash residue was obtained.
The samples were ashed for about 5 hrs until a grey or white ash residue was obtained.
Soda bottles turned up in carpets, and ash residue from coal plants formed concrete.
This paper examines the potential use of coal bottom ash residue, obtained from a brick-producing factory, in cement pastes.
This approach is based on the fact that sintering of the ash residue results in destruction of its toxic organic components, and also fixation of its heavy metal content.
Fossil fuel is, even aside from the carbon it pumps into the atmosphere, literally poison, from the mercury that contaminates the air when coal is burned and the mountains of coal ash residue to the toxic emissions and water contamination of fracking and the sinister chemicals emitted by refineries to the smog from cars.
The operating conditions of the AFBC system together with the physical characteristics of the ash allowed a full elutriation of the ash residues.
Cerium oxide nanoparticles introduced into a full-scale incinerator are properly filtered and remain in ash residues, but other risks from nanoparticles generated or altered by incinerators should not be overlooked.
Ash residues that arise during combustion of solid fuels form deposits on heat exchanger surfaces which hinder the heat transfer to the working fluid steam.
The temperature profiles, gas composition and the properties of fly ash residues were investigated for different RDF fuels and operating conditions.
In this paper we identify fuel ash residues from temporally constrained middens at two contrasting settlement age sites in Mývatnssveit, northern Iceland, one high status, the other low status and ultimately abandoned.
