Guidelines for the use of ladle refractories

Causes of Ladle Refractory Materials Damage and Measures to Improve the Service Life

The main reasons for the damage of ladle refractory materials include the following aspects.

Chemical effects

1.The corrosion of refractory materials by the components of molten steel;
2.The erosion of refractory materials by the components of molten slag;
3.The damage caused by the reaction of the refractory materials themselves under the high temperature.

Physical effects

1.The scouring effect of molten steel on refractory materials;
2.The thermal shock caused by molten steel repeatedly acting on refractory materials,;causing cracking and peeling of refractory materials in continuous casting machines;
3.The damage caused by the thermal expansion effect of refractory materials themselves;
4.The impact of high-temperature molten steel on refractory materials;
5.The erosion effect.

Improper operation reasons

1.Improper selection and matching of refractory materials;
2.Improper use of refractory materials,for example, the masonry method and baking method are inappropriate;
3.Improper unpacking damages the permanent layer of the ladle;
4.No repair measures are taken.

The main measures to improve the service life of the ladle include

1.Selecting refractory materials that are resistant to high temperature, erosion, and thermal shock as the lining;
2.Correctly select and match the refractory materials, achieve a balanced ladle construction;
3.Fully understand the performance of the selected refractory materials.