Well type furnace is a periodic operation furnace suitable for heat treatment of rod and long shaft parts. The structure of a well type furnace is that the furnace body is a cylindrical deep well, and the workpiece is vertically loaded into the furnace by a dedicated crane for heating. The fuels used are usually coal gas and fuel oil. When electricity is used as the heat source, it is called a well type resistance furnace. Well type furnaces are generally installed below the workshop floor level, as well as above the floor level, or half above and half below the floor level.