US 4,737,326 A · Refractory shapes of ceramic fiber-containing material

Abstract

Process for the production of refractory shapes of ceramic fiber-containing mateial, wherein a slurry of refractory fibers and particulate refractory materials is produced in water, the particulate refractory materials are flocculated on the fibers by use of a flocculant, and the desired shape is produced by dewatering the slurry in a suitable mold that enables the water to be removed, and the shape is dried. At least 90% of the fibers have a maximum length of not more than 500 .mu.m; flocculant is added as an aqueous solution to the dispersion of the fibers and particulate refractory material; and pressure is applied to the shape being formed during the dewatering of the slurry to form the desired shape in order to compress the shape.

Claims12

Dependent claims

A process for producing a refractory shaped article, which comprises the steps of:

providing an aqueous slurry containing water, refractory fibers at least 90% by weight of which have a length of not more than 500 .mu.m, and particulate refractory material, other than refractory fibers, having a particle size of up to 0.9 mm, wherein said slurry contains 1 to 40 parts by weight of said particulate refractory material per 100 parts by weight of said refractory fibers;
mixing said slurry with an aqueous solution of a flocculant to flocculate said particulate refractory material on said refractory fibers;
molding the resultant mixture under pressure while removing water from said mixture;
and
drying the resultant molded article.

2 more elements

Dependencies are inferred from the claim text.

Refractory shapes of ceramic fiber-containing material

Life of this patent

Refractory shapes of ceramic fiber-containing material

Life of this patent

Abstract

Claims12