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Clinker (waste)

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Title: Clinker (waste)  
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Subject: Smelting, Extractive metallurgy, Kepier power station, Furnace, Forge
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Clinker (waste)

Clinker is a general name given to waste from industrial processes — particularly those that involve tuyère. Clinker often forms a loose, black deposit that can consist of coke, coal, slag, charcoal, grit, and other waste materials.

Clinker may be reused for paving footpaths. It is laid and rolled, and forms a hard path with a rough surface.

Clinker often has a glassy look to it. It is much heavier than coke.


"Clinker" is from Dutch, and was originally used in English for bricks – see clinker brick. The term was later applied to hard residue, due to similar appearance.


In sewage treatment works, the water is first of all screened to remove floating debris. Then it is sedimented to remove small insoluble impurities. After this, it is sprayed over a filter bed of clinker, where microbes in the clinker kill harmful anaerobic bacteria in the water.

See also

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