Filter Elements
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United States of America Patent
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Issued Date -
Dec 25, 2008
app pub date -
Oct 27, 2006
filing date -
Oct 27, 2005
priority date (Note) -
Abandoned
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Abstract
A ceramic filter element is formed from a flocculated slurry predominantly containing inorganic fibres, of 100-150 .mu.m length and 1-5 .mu.m thickness. The slurry also contains inorganic yarn in lengths of from 10 mm or greater, e.g. 10-150 mm and thickness 0.1-0.5 mm diameter. The slurry is formed in water with colloidal silica and starch added to flocculate the slurry. The flocculated slurry is then injected to a mould comprising an appropriately shaped mesh form, and water removed by vacuum, and the filter thus formed dried in an oven for 8-12 hours at 120.degree. C. The addition of yarns, which may be glass or alumina mono or multifilament yarns, increases the shock resistance of the ceramic filter element produced.
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