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US 7,744,811 B2Granted
Furnace expansion joint with compressible graphite joint filler and manufacturing method
AssigneeSgl Carbon SE
InventorsJörg Mittag, Oswin Öttinger
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Abstract
Expansion joints located in the upper part of the hearth walls of a reduction furnace are filled with a plate-shaped compressible graphite filler having a density of 0.1 to 0.2 g/cm3. A method of manufacturing such a joint filler is also provided.
Claims12
An expansion joint located in an upper part of hearth walls of a reduction furnace, the expansion joint consisting of:
- two lining blocks forming two horizontal gaps each having a height of 25 to 45 mm and a vertical seamless joint therebetween;
- and
- a plate-shaped compressible graphite filler having a density of 0.1 to 0.2 g/cm3 obtained by compacting expanded graphite precursor material, said filler filling said horizontal gaps.
Dependencies are inferred from the claim text.