I think you might be talking about soot. Soot is the leftover stuff from when wood or other materials are burnt.
Umbuthi is a kikuyu word which means powdery stuff.
A black powdery or flaky substance consisting largely of amorphous carbon, produced by the incomplete burning of organic matter.
A chimney chase is the structure through which chimney pipe is run.
Chimney
The regular plural of chimney is chimneys.
The black stuff in a chimney is most likely creosote, a residue that forms from unburned wood particles and tar condensation. Creosote buildup is highly flammable and can pose a chimney fire hazard if not regularly cleaned. It is important to have your chimney professionally inspected and cleaned to ensure safe operation.
Chimney soot is a black, powdery substance that forms when incomplete combustion of carbon-based fuels occurs in a chimney. It consists of carbon particles and other byproducts of burning, such as ash and creosote. Soot can build up in chimneys over time, leading to potential fire hazards and poor indoor air quality.
Umbuthi is a kikuyu word which means powdery stuff.
Chimney dust is often referred to as soot or creosote. Soot is a black powdery or flaky substance composed mostly of carbon that can accumulate in chimneys. Creosote is a tar-like substance that is a byproduct of wood burning and can also build up in chimneys, posing a fire hazard.
black rat snake
The preposition in the sentence "Black smoke rose up the chimney" is "up." This preposition indicates the direction in which the smoke is moving.
Soot, ash, and dust.
Starch is a white, odorless, tasteless powder consisting of long chains of glucose molecules. It can appear as a fine, powdery substance or in more granular forms, depending on how it is processed.
chimney
needs to be cleaned
The snow was very powdery on Sunday. The cocaine was more powdery than usual.
Chimney residue, also known as creosote, is a black, tarry substance that can accumulate inside chimneys from the burning of wood or other fuels. It is highly flammable and can pose a fire hazard if not cleaned regularly. Chimney residue should be professionally removed to prevent chimney fires.