| 摘要 |
1449484 Hydraulic refractory composition DIDIER-WERKE AG 9 Oct 1973 [9 Oct 1972] 47104/73 Headings C1H and C1J An hydraulic refractory composition comprises aggregate, microfillers and a binder composition Portland cement: and solid acid phosphate in a weight ratio of cement : phosphate of 1 : 1 to 20 : 1 the acid phosphate being. one of which a 1% by wt. aqueous solution. exhibits a pH of below 6. The. microfiller maybe a clay binder, bentonite, kaolin, very. finely divided alumina or chromia, siliceous calamines or graphite. The aggregate may be corundum, nullite, bauxite, fire-clay, spinel, sillimanite, quartzite or zircon. - |
