| 摘要 |
FIELD: manufacturing refractory materials. ^ SUBSTANCE: refractory packing mass comprises, in mass %, 51-61 of grain corundum, 32-43 of the mixture of fine corundum and refractory clay, and 5.5-7.5 of orthophosphoric acid. ^ EFFECT: enhanced strength. ^ 3 cl, 1 tbl |
