open-hearth furnace
Definition
Noun: A type of industrial furnace used primarily for steelmaking, characterized by a shallow, saucer-like hearth. The process involves placing raw materials (like pig iron and scrap steel) on this hearth, where they are melted and refined by flames of burning gas and hot air directed over the surface of the molten metal.
Usage
The term "open-hearth furnace" specifically refers to the furnace itself and the steelmaking process associated with it. * The open-hearth furnace was a dominant method of steel production for much of the 20th century. * Engineers designed a new open-hearth furnace to increase the plant's output.
Advanced Usage
- The phrase is often used in historical or industrial contexts to describe obsolete or traditional steelmaking technology, contrasting with modern methods like the basic oxygen furnace.
- While revolutionary in its time, the open-hearth furnace has largely been replaced by more efficient processes.
Variants and Related Words
- Open-hearth process (noun phrase): The method of steelmaking carried out in an open-hearth furnace.
- The open-hearth process allowed for better control over the steel's composition.
- Open-hearth steel (noun phrase): Steel produced by this method.
Synonyms
- Siemens-Martin furnace (This is the technical name, named after its inventors).
Noun
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a furnace for making steel in which the steel is placed on a shallow hearth and flames of burning gas and hot air play over it
