Thermal Ceramics UK Limited

Farid Modarresifar

Gary Jubb

A process for the manufacture of inorganic fibres comprises: (a) selecting a composition and proportion of: (i) silica sand; (ii) lime comprising at least 0.10 wt % magnesia; and (iii) optional additives comprising a source of oxides or non-oxides of one or more of the lanthanides series of elements, or combinations thereof; (b) mixing the silica sand; lime; and optional additives to form a mixture; (c) melting the mixture in a furnace; and (d) shaping the molten mixture into inorganic fibres. The raw materials selection comprises composition selection and proportion selection of the raw materials to obtain an inorganic fibre composition comprising a range of from 61.0 wt % and 70.8 wt % silica; less than 2.0 wt % magnesia; less than 2.0% incidental impurities; and no more than 2.0 wt % of metal oxides and/or metal non-oxides derived from said optional additives; with calcia providing the balance up to 100 wt %; and wherein the inorganic fibre composition comprises no more than 0.80 wt % AlOderived from the incidental impurities and/or the optional additives.

Thermal insulation

The present invention relates to inorganic fibres having a composition comprising: The sum of SiOand CaO is greater than or equal to 98.8 wt % and the other components comprise less than 0.70 wt % AlO, if any.

A fibre mat, for example a monolith support mat or end cone insulator, the mat comprising inorganic fibres having a pressure retained value at 10 minutes at 900&#xb0; C. of greater than 20 kPa; and preferably a binder. The inorganic fibres comprise X and Y and KO, the sum of which is greater than 95 wt. % wherein X is the sum of SiOand ZrOand Y is the sum of AlOand LaO, wherein ZrOand LaOis each present in up to 10 wt. % of the total weight of the inorganic fibres.

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Merseyside, United Kingdom

Farid Modarresifar