Furnaces through which the charge is moved mechanically, e.g. of tunnel type (rotary-drum furnaces with means for agitating or moving the charge F27B7/14); Similar furnaces in which the charge moves by gravity

Child Classifications

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• F27B 9/02 of multiple-track type; of multiple-chamber type; Combinations of furnaces
• F27B 9/04 adapted for treating the charge in vacuum or special atmosphere
• F27B 9/06 heated without contact between combustion gases and charge; electrically heated
• F27B 9/12 with special arrangements for preheating or cooling the charge
• F27B 9/14 characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment (for treating continuous lengths of work F27B9/28)
• F27B 9/28 for treating continuous lengths of work
• F27B 9/30 Details, accessories or equipment specially adapted for furnaces of these types