| 摘要 |
<p>PURPOSE: A production of castable refractory using waste MgO-Cr2O3-based brick is provided to save manufacturing costs and recycle resources efficiently. CONSTITUTION: The castable refractory comprises 20-50wt.% of ground MgO-Cr2O3-based bricks having 1-5mm of particle size, 10-40wt.% of MgO clinker having 1-5mm of particle size, 15-20wt.% of spinel clinker smaller than 0.074mm, 3-10wt.% of Al2O3 powder smaller than 5micrometer, 1-5wt.% of Al2O3 cement, 1-3wt.% of silica flowers to improve fluidity and binding strength, 0.05-0.2wt.% of sodium hexametaphosphate, dispersant and 0.01-0.04wt.% of citric acid to prevent rapid hardening.</p> |
