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US 4,151,693 AGranted
Refractory/insulating modules and method of making same
AssigneeM. H. Detrick Co., Limited
InventorBarrie J. Harvey
Life of this patent
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AssigneeM. H. Detrick Co., Limited
InventorBarrie J. Harvey
Estimating the term…
A refractory and insulating module for use in lining a furnace or other high temperature enclosure comprises a block having a front wall and side walls the outer faces of which side walls are inclined inward from front to back of the block, the rear of the block being open to provide a cavity. The front face of the front wall of the block is of lower density than the rear face of the front wall. The block is produced from a ceramic fiber slurry using a suction technique in conjunction with a mould shell which forms every face of the block except the front (hot) face of the front wall, the shell being formed with multiple apertures. The rear cavity may accommodate layers of other insulating materials according to the temperatures to be withstood and the temperature gradient to be achieved. The block can be secured to a furnace casing by means of fastening elements which are pushed into the outer sides of the side walls of the block. Adjoining blocks are sealed with respect to each other by a sealing fabric nipped between the edges of the front faces of the blocks.
A refractory and insulating module comprising a hollow block moulded in one piece from ceramic fibre and being open at the back thereof, said block having a front wall, the front face of which constitutes the hot face, and side walls the outer side surface of each of which is inclined inwardly from front to back of the block, and the front wall having a lesser density at its front face than at its rear face.
A refractory and insulating module comprising a block moulded in one piece from ceramic fibre and having a front wall the front face of which constitutes the hot face of the module, and side walls which with the front wall form a rearwardly open cavity and which have their outer side surfaces inclined inwardly from front to back of the block, the front wall having a lesser density at its front face than at its rear face, at least one layer of a refractory and insulating material located in said cavity and extending parallel to said front wall of the block, a second block made from a refractory material of lower grade than the first said block and secured to the back of the first said block, and two adjacent side faces of the composite structure formed by the first and second blocks having secured thereto a layer of an insulating fabric which is compressible in thickness.
Dependencies are inferred from the claim text.