Patent ID: 8069628

Claim:
Ring furnace comprising a plurality of inner partitions forming a series of distinct firing sections and pits within the sections, said partitions comprising transversal walls to separate said sections and hollow partitions to separate the pits, at least one of said inner partitions being formed by a plurality of bricks made of a refractory material including at least a first, a second and a third brick, each comprising at least two opposite lateral faces, positioned in parallel to the longitudinal direction L of the partition, two opposite end faces and two opposite assembly faces and each comprising at least one flat surface, said first and said second bricks being situated above or below said third brick and positioned so that their end faces facing one another are separated by a space of width J, wherein said first brick has at least a first recess on its assembly face opposite the third brick, said recess having a dimension E in said longitudinal direction L of said partition, wherein said third brick has at least a first projection on its assembly face facing said first brick, said first projection having a dimension B in said longitudinal direction L of said partition and being inserted into said recess, wherein, so as to allow relative movements between said first and said third bricks in said longitudinal direction of said partition during the operation of the furnace, said dimension E of said recess is greater than said dimension B of said first projection, and wherein, in order to form a stop for said projection on the side of said space, said recess is positioned at a determined distance Se from the end face adjacent to said space.