Open hearth furnace

{
  "id": "MLC-T-CHM-008251",
  "term": "Open hearth furnace",
  "field": "Chemistry",
  "definition": "A type of metallurgical furnace used for making steel, characterized by a shallow, open-hearth design where the charge is heated by direct flame and radiant heat from the roof. It operates on a regenerative principle, preheating combustion air and fuel gas with exhaust gases to achieve high temperatures. This method was largely replaced by basic oxygen furnaces and electric arc furnaces.",
  "subject": "Chemistry and the Environment",
  "see_also": [
    "melting"
  ],
  "references": [
    "PAC, 1990, 62, 2167. 'Glossary of atmospheric chemistry terms (Recommendations 1990)' on page 2204 (https://doi.org/10.1351/pac199062112167)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/open-hearth-furnace/"
}