Technical Measures for Increasing Lining Life of Refining Ladle

The technical measures for increasing the service life of refining ladle lining were presented, and the influence of service conditions on the life during the campaign were investigated. The practical results of two different projects were compared. The project A was that the ladle was lined with MgO-MA-C bricks on the whole wall and the project B was that the slag zone was lined with MgO-C bricks while the sidewall was lined with Al₂O₃-MgO-C bricks. The results showed that both project A and B could increase the service life remarkably, the ladle comprehensive life of the project A increased 7.2% and the average corrosion rate of slag zone decreased 15.8% compared with the project B in practical operation. Microstructure analysis of the used bricks from the ladle lining suggested that the formation of dense MA layer in the project A was the key to prolong service life. Besides, service conditions such as turnover time of ladle, steel liquid temperature, slag compositions and so on were also contributed to the service life. It was found that the life could also be improved effectively by stabilizing the ladle operations during the campaign and the refining process.