| 摘要 |
Refractory composition ready for hot or cold-hardening of the type comprising: (a) a filler of refractory mineral grains with high mechanical characteristics, for example silica, alumina or carbon; (b) at least one primary binder of the heat-hardenable type for agglomerating the grains of said filler; and (c) at least one secondary binder designed to improve and/or correct the faults of the primary binder. This composition is characterised in that the secondary binder is produced by saponification of a carbonated product whose acid value is sufficient for it to be modified by saponification, said secondary binder thereby becoming compatible with the primary heat-hardenable binder. The invention naturally also relates to a secondary binder and to the composite binder obtained by mixing the primary heat-hardenable binder with the secondary binder used in the refractory composition, as well as to a process for preparing said composition. The refractory composition according to the invention is suitable in particular for producing foundry moulds and mould cores, bricks and patches, and taphole clays for filling ports in blast furnaces. |
