REFRACTORY MASS FOR RAMMED LINING Russian patent published in 1994 - IPC

FIELD: metallurgy. SUBSTANCE: mass has, wt. -% : boric acid 2-3; finely dispersed chrome oxide 0.5- 1.5; sodium silicate 2-3; mullite-corundum mortar 15-25, and crystalline quartzite - the rest. Properties: compression strength limit is 34-47 H/mm², opened porosity is 12.5-21.0% , linear changes are 1.75-2.65% , caking deep is 55-67.5 mm, wear value per melting is 7.5-9.5 mm. Mass is used for lining of pouring scoops made of cast iron and steel. EFFECT: enhanced quality of mass. 2 tbl