| 摘要 |
1504935 Carbonaceous articles; refractory lining VYSKUMNY USTAV HUTNICKEJ KERAMIKY 22 Aug 1975 [30 Sept 1974] 34982/75 Headings C1A and C1J [Also in Division F4] A refractory lining, particularly for the tapping spout of a blast furnace comprises a lower (cold side) base layer comprising 70-90% by weight of carbonaceous material, e.g. calcined anthracite, thermo anthracite, coke, graphite or a mixture of these, containing at least 1% anthracite, with 1-30% of a liquid organic binder, e.g. tar or pitch and an upper (hot side) replaceable working layer comprising a water miscible mass comprising 40-99% by weight of refractory material, at least 1% by weight being carbonaceous material, e.g. anthracite, coke, coal, graphite, silicon carbide or a mixture, and the non carbonaceous component comprising a siliceous material, e.g. fireclay, mullite, high alumina refractory, corundum or a mixture, and 1-60% of binder, e.g. clay, hard pitch, an alkali metal silicate, a sulphate or a phosphate or a mixture. Base layer compositions given are and and the corresponding replaceable upper layers have the following compositions and |
