Patent ID: 6116894
Filing Date: 2000-09-12
Classification: F27B

Abstract:
Continuous furnace for firing ceramic molded parts, comprising:a furnace wall defining a tunnel through which ceramic parts to be fired are moved,a pre-heating zone (14), a firing zone (16), and a cooling zone (18),at least one combustion gas duct (22) extending from said preheating zone (14) into a combustion chamber (24),at least one hot air duct (28) leading back from said combustion chamber (24) to said pre-heating zone (14).said hot air duct (28) branching into a plurality of warm air ducts (30) before entering said pre-heating zone said warm air ducts (30) entering said pre-heating zone (14) at different locations in the furnace wall from one another, andcold air ducts (32) opening into at least one of said hot air duct (28) and said warm air ducts (30),in which a separate cold air duct (32) is associated with each of said warm air ducts (30).