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POWDER BOROSILICATE COMPOSITE AND METHOD OF MANUFACTURING CELLULAR BOROSILICATE SUBSTANCE
POWDER BOROSILICATE COMPOSITE AND METHOD OF MANUFACTURING CELLULAR BOROSILICATE SUBSTANCE
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机译:粉末状硼硅酸盐复合物及制造蜂窝状硼硅酸盐物质的方法
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摘要
An aqueous slurry comprising an intimate mixture of colloidal silica, (preferably an amorphous, precipitated, hydrated silica), caustic potash, boric acid and alumina is first prepared and then dried. The dried aggregates are thereafter crushed, calcined and rapidly quenched. It is preferred to dry the slurry in a spray drier and thereafter omit crushing after drying and to calcine the dried admixture by means of a plasma arc so that the mixture is rapidly quenched after calcination. The calcined mixture is introduced into a crusher, such as a ball mill, with a carbonaceous cellulating agent and reduced to a fine pulverulent material. The pulverulent material is then cellulated in a cellulating furnace to form cellular borosilicate bodies. Where desired, the calcined material may be utilized as a ceramic frit.
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