Bogie Hearth Furnace

Bogie hearth furnaces are classified as low temperature furnace and high temperature furnace. Low temperature furnaces work within 100 – 450°C. Generally, as this temperature heat transformation can take place only by convention, air circulation is provided which circulates air from the chamber to the impeller, the air passes through heaters and reenters the chamber. This circulation continues. There is counter flow type air circulation where in air is circulated perpendicular to the hearth and enters the chamber at the bottom or either side. These are usual flow type furnaces wherein air passes across the hearth. Generally, to get uniformity the furnaces are designed to 20, 30 & 50 times the volume of circulation of the chamber per minute.