Hearth-type furnaces

FMECHANICAL ENGINEERING LIGHTING HEATING WEAPONS BLASTING ENGINES OR PUMPS F27Furnaces F27BFURNACES, KILNS, OVENS, OR RETORTS IN GENERAL OPEN SINTERING OR LIKE APPARATUS

F27B3/00Hearth-type furnaces

F27B3/002Siemens-Martin type furnaces F27B3/005Port construction F27B3/007Removable burner head F27B3/02of single-chamber fixed-hearth type F27B3/04of multiple-hearth type of multiple-chamber type Combinations of hearth-type furnaces F27B3/045Multiple chambers F27B3/06with movable working chambers or hearths F27B3/065tiltable F27B3/08heated electrically, with or without any other source of heat F27B3/085Arc furnaces F27B3/10Details, accessories, or equipment peculiar to hearth-type furnaces F27B3/105Slag chamber F27B3/12Working chambers or casings Supports therefor F27B3/14Arrangements of linings F27B3/16Walls Roofs F27B3/18Arrangements of devices for charging F27B3/183Charging of arc furnaces vertically through the roof F27B3/186Charging in a vertical chamber adjacent to the melting chamber F27B3/19Arrangements of devices for discharging F27B3/20Arrangements of heating devices F27B3/205Burners F27B3/22Arrangements of air or gas supply devices F27B3/225Oxygen blowing F27B3/24Cooling arrangements F27B3/26Arrangements of heat-exchange apparatus F27B3/263Regenerators F27B3/266Exhaust gases reversing flow devices F27B3/28Arrangement of controlling, monitoring, alarm or the like devices