| 摘要 |
A refractory lining substance for pig iron troughs and the like contains (1) granular refractory material preferably about 30% of which is a 1-3 mm sieve fraction, the remainder being finer, (2) tar 8-15%, preferably 9-12%, preferably containing over 70% pitch and 9-11% C2 resins, and preferably having a viscosity of less than 8,000 cp at 20 DEG C; and (3) has at least 75% of the mass consisting of magnesite. It (4) preferably contains Cr2O3, and (5) may contain ground coal (anthracite and/or bituminous coal and/or coke) from 0-15%, preferably less than 5%, more preferably less than 1%. The processes for making and using same, and troughs lined therewith are also disclosed. |
