2026-09-28T02:02:45+01:00https://marinefinds.org.uk/datalabs/terminology/object/format/jsonhttps://marinefinds.org.uk/datalabs/terminology/object/format/xmlhttps://marinefinds.org.uk/datalabs/terminology/object854192804OPEN HEARTH FURNACEYA form of blast furnace. Steel is smelted in an open hearth while the waste gases are used to preheat the air blast.1P