Process for the manufacture of carbon-bound shaped parts which contain mineral fibres

Abstract From the Canadian patent

Shaped parts which contain refractory or fireproof mineral fibres are, manufactured by a process in which the mineral fibres are embedded in a carbonaceous matrix. The shaped parts are carbon-bound and contain mineral fibres. Finely particled pitch tar or resol or novolak resins, from an aqueous suspension is flocculated onto the mineral fibres which are present in the aqueous suspension. Then a green shaped part is produced from the suspension and this green shaped part is dried and subjected to pyrolysis at temperatures of from 350°C to 1300°C. The bulk density of the shaped parts can be adjusted over a wide range. Very low bulk densities can be achieved.