Patent ID: 11932568
Assignee: SAINT-GOBAIN CENTRE DE RECHERCHES ET D'ETUDES EUROPEEN
Field: Other special machines (Mechanical engineering)
Classification: CPC C | IPC C

Claim 16:
17. A glass furnace comprising:
a tank comprising an upper edge;
a metallic structure; and
a superstructure comprising a lateral wall and an intermediate course comprising an insulated tuckstone,
said insulated tuckstone comprising:
a cast or sintered basic tuckstone, in the form of a profile section of L-shaped cross section comprising a superstructure leg and a tank leg, said basic tuckstone defining an exterior surface made up:
of first and second end surfaces delimiting the length of the basic tuckstone,
of a lower surface constituted by a flat horizontal laying surface resting on the metallic structure, a tank surface extending facing the upper edge of the tank, and a lower transition surface connecting the laying surface and the tank surface;
of an exterior lateral surface;
of an upper surface comprising a superstructure surface on which the lateral wall is resting, and an upper transition surface connecting the superstructure surface and the lower surface;
an insulating layer comprising a sheet made of a sintered ceramic matrix composite made up of fibers rigidly bound together by a ceramic matrix, the fibers being arranged in the form of a woven fabric and exhibiting a compression strength greater than 1 MPa and a compressive crush strength greater than 10 MPa,
the insulating layer exhibiting a thermal conductivity lower than 2.0 W·m−1·K−1 between 20° C. and 500° C., Pa, the basic tuckstone having an insulated surface covered by said insulating layer, the insulating layer having a shape tailored to the insulated surface,
said insulated surface being included in the lower surface of said basic tuckstone, extending into the lower transition surface, and representing more than 20% of the lower transition surface,
said insulating layer having a chemical composition, as a percentage by mass on the basis of the oxides, such that Al2O3+SiO2+ZrO2+CaO+Na2O+MgO +K2O+TiO2+Fe2O3+HfO2+P2O3+Y2O3 >80%,
wherein the insulated surface does not extend so far as to cover, even partially, the laying surface, or the insulated layer is pinched between the laying surface and the metallic structure.