FIRING KILN AND PROCESS FOR PRODUCING POROUS CERAMIC MEMBER THEREWITH

摘要

An object of the present invention is to provide a firing furnace which is free from occurrence of warping and corrosion in a heat insulating layer, so that it becomes possible to eliminate the necessity of exchanging members forming the heat insulating layer for a long time, and consequently is excellent in durability and heat efficiency. The firing furnace of the present invention is a firing furnace which includes a muffle formed so as to ensure a space for housing a formed body to be fired, a member that constitutes a heat generator and is placed on and/or around the muffle, and a heat insulating layer containing the muffle and the heat generator. Herein, a carbon-natured sheet is provided in the vicinity of corner portions of an inner face of the heat insulating layer.