Abstract A tank for containing a bath of molten metal in a float glass furnace has a wall formed by a plurality of juxtapositioned prefabricated refractory members. The joints between the members define interstices. Interstices are also being defined adjacent other faces of the blocks. Powdered carbon, alumina, chromium oxide, a carbide or nitride not wettable by molten metal at least partially fills these interstices to prevent the flow of molten metal therein so as to prevent raising of the blocks from their assembled positions by the flow of molten metal behind the blocks. These are in the interstices between the particles of the powder flow paths having restricted cross-sectional areas. The object of these restricted areas and the surface properties of the powder material is to prevent penetration by molten metal.
In a wall for a refractory furnace tank for making glass floating on a bath of molten metal, the combination of a plurality of juxtapositioned prefabricated refractory blocks defining at least a thickness portion of a refractory furnace tank wall, there being interstices in the joints between the interior faces of said blocks, said interstices being filled with a pulverulent material not wettable by the molten metal and whose density is less than of the molten metal in order to prevent penetration of the metal into the interstices, and wherein said interstices have a configuration to define a higher and a lower zone with said higher zone being further from the faces of the blocks toward the interior of the tank than said lower zone, the distances being measured along the said interstices.
Claim 2
Dependent Claim
15 words
In a wall as claimed in claim 1 wherein said pulverulent material is principally carbon.
Claim 3
Dependent Claim
28 words
In a wall as claimed in claim 1 wherein said interstices are also located along faces being behind the blocks from the interior of the refractory furnace tank.
Claim 4
Dependent Claim
17 words
In a wall as claimed in claim 3 wherein the grains of carbon are smaller than 0.1mm.
Claim 5
Dependent Claim
15 words
In a wall as claimed in claim 1 wherein said pulverulent material is loosely packed.
Claim 6
Dependent Claim
68 words
In a wall as claimed in claim 1 wherein said blocks have downwardly directed ribs around at least the major part of their bottom faces, means under said juxtaposed blocks for defining a foundation surface thereunder, there being recessed means in said foundation layer to receive said ribs, said pulverulent material being between said blocks and foundation surface, at least along the inner side faces of said ribs.
Claim 7
Dependent Claim
42 words
In a wall as claimed in claim 1 where said juxtapositioned blocks form at least one layer of a wall also comprising means in the interstices between the blocks for providing different resistances to heat transfEr in different areas of the wall.
Claim 8
Dependent Claim
24 words
In a wall as claimed in claim 1 wherein said pulverulent material is A12O3, Cr2O3, or carbides and nitrides not wettable by molten tin.