Steel Industry
What is a Steel ladle?
The structure of the ladle is mainly composed of three parts: outer shell, lining and mainstream control mechanism.
The temperature range of the molten steel in the ladle is about 1550~1620℃, and the ladle must withstand the impact of severe cold and heat during service. Since the use conditions of refining ladles are extremely harsh, arc erosion of the slag line and ladle wall is very serious, resulting in premature damage to the refractory materials and becoming the main reason restricting its service life. Therefore, the requirements for ladle brick linings are higher than iron ladle brick linings.
Ladle requires refractory materials to be resistant to high temperatures, erosion, rapid cooling and heating, good slag resistance, and sufficient high temperature strength.
Refractory materials used in Steel ladles
Clay bricks are used for the bottom layer of the ladle, high-alumina bricks are used for the working layer of the ladle, aluminum-magnesium castables are used for the main body of the ladle, and unburned bricks are used for the walls of the ladle.
If the ladle is also used for refining, refractory materials that can also be used: zircon bricks, magnesia carbon bricks, alumina-magnesia carbon bricks, magnesia-chrome bricks, magnesia-chrome-aluminum bricks, etc.
Product/Part Name
| PRODUCT NAME/ CHARACTERISTICS |
MAXIMUM TEMPERATURE |
Bulk Density |
Chemcal Composition % |
| High alumina bricks Dense structure Refractoriness under load high |
≥1510℃ | 2.5 | Al₂O3≥70 Fe₂O3<2.0 |
| Magnesia chrome bricks Refractoriness under load high High temperature strength |
1650℃ | 3.1 | Cr₂O3≥18 |
| Magnesia carbon bricks High refractoriness and strong corrosion resistance |
1700℃ | 2.9 | MgO≥80 C≥10 |
| Zircon bricks High refractory temperature and strong corrosion resistance |
1650℃ | 3.45-3.70 | ZrO265 SiO234 Fe₂O₃0.3 |
| Aluminum magnesium castable High strength and strong slag resistance |
1600℃ | 2.95 | MgO+Al2O3≥95 |
| Refractory clay bricks |
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