| 摘要 |
<p>1300714 Refractories DRESSER INDUSTRIES Inc 28 May 1971 [10 June 1970] 18149/71 Heading C1J A refractory material contains a refractory aggregate and a binder consisting of a granular P 2 O 5 containing material that gives an analysis at least 50% by wieght of P 2 O 5 , and a fatty acid containing pitch. The aggregate may be alumina, calcined fireclay, crude fireclay, calcined bauxite, crude bauxite, dead burned magnesite, kyanite, chrome ore, zirconia, zircon or any mixture. The fatty acid-containg pitch is the residual material obtained in fractional distillation of animal or vegetable materials. The pitch may be "saturated" or "unsaturated".</p> |
