The phrase "a bed of ash" is correct and usable in written English.
It can be used metaphorically to describe a situation or state that is desolate, lifeless, or the aftermath of destruction.
Example: "After the fire swept through the forest, all that remained was a bed of ash, a stark reminder of the devastation."
Alternatives: "a pile of ashes" or "a layer of ash".
We set off to a small square, where what had been grass was now a bed of ash 4in thick, and the first three shelters we uncovered were empty.
It was determined that a bed of ash particles has the highest voidage, followed by the char bed and then coal bed with the lowest voidage.
On the lines of the former London, Chatham and Dover Railway (LCDR), flint beach pebbles on a bed of ash had been used for ballast.
A bed of ashes covered the floors, like the pristine white of a first snow; so many tears running through this place.
I hold back some of the burning embers in the fire pit, where I plan to roast the root vegetables in a bed of ashes.
He believes people have to be trusted to make choices, and the console of his Mercedes reflects it, from the cord for his verboten hand-held cell phone to the gnawed cigar stubs stuck in a bed of ashes.
Beside the roadside blacktop,a deer, with black diamonds in its eyes, lay in a bed of black pansies.Around us, black ash and black walnuts made a velvety curtain.Dead ten years, he visits me often, like a head behind bars, with that black temperand black bile still coming out of his mouth, but tenderness, too, like black gold.Did I love him back, I wonder?
The fire made a hiss and I kicked the last few embers around in the bed of ash.
Among the standing charred trees were jack pines, with opened cones dangling from the tips of branches, cones that would release their seeds to the bed of ashes.
The large bed ash particles represents a bed ash fraction that was sieved out of the bed ash with a considerably larger sieving particle size than the bed material (>1.2 mm, compared to the 0.200 0.250 mm of sieved bed material).
Based on these bench-scale experiments it is likely that biosolids could be combusted in a full-scale bubbling fluidized bed to produce a bed ash fraction which contains most of the phosphorus introduced with the fuel where a pretreatment step to produce durable bed ash particles after fuel burn-out possibly could increase phosphorus recovery.
