| 摘要 |
PROBLEM TO BE SOLVED: To increase the corrosion resistance in no need of SiO2 with a reduced amount of cement by formulating a specific amount of sodium polyacrylate to a prepared unshaped refractory for the wet-spraying process. SOLUTION: This prepared unshaped refractory for the wet-spraying process is prepared by adding 0.01-1.0 wt.% of sodium polyacrylate in the outer percentage to a prepared unshaped refractory for the wet-spraying process such as alumina, magnesia, silica, zirconia, silicon carbide, graphite, high alumina, Chamotte fireclay, pyrophyllite or the like. To this prepared unshaped refractory, is added liquid sodium silicate or a diluted solution of liquid sodium silicate of >=50 wt.% concentration as an accelerator, and the mixture is sprayed with a two-piston type wet concrete sprayer whereby the life of the refractory lining can be prolonged without adverse effect on the corrosion resistance. |
