After installation, the linings should be heated-up. The heat-up of the linings should occur slowly at the rate shown in the graph. If mortars are heated too rapidly, the materials may shrink excessively and rapture.
Heating Schedules:
Schedule 1: Temperature is raised at the rate of 30-500C per hour
Schedule 2: Temperature is maintained at 560 0C for 5 hours
Schedule 3: Temperature is raised at the rate of 30-50 0C per hour until the temperature under operating condition is reached