Fremgangsmåde til fremstilling af et blæreholdigt silicatmateriale.

摘要

A process for the manufacture of a blistered silicate material having a high content of wollastonite and a low content of cristobalite and containing up to 30 to 40 percent by volume of fine blisters the size of a majority of which are 0.1 to 1mm with a substantial proportion being below 0.1mm wherein raw materials for the silicate material are introduced partly at the upper end of an inclined rotary kiln and partly at the lower end of the rotary kiln, whereby the materials will be distributed in the burning zone and melt.