Ladle castable

Abstract

The invention relates to ladle castable. The use of the castable can reduce the slag adhesion of ladles, improve the yield of hot metal and operation efficiency, and can reduce the maintenance cost for the ladles. The ladle castable comprises the chemical components in percentage by weight: 45 to 60 percent of Al2O3, 30 to 40 percent of SiO2, 5 to 15 percent of ZrO2, less than 1 percent of CaO, and 2 to 5 percent of SiC. The ladle castable is used for integral casting of the ladles.

Description

Technical field: [0001] The invention relates to an amorphous casting material, in particular to a ladle casting material used for integral casting on the working lining of a ladle. Background technique: [0002] The use of ladles is an important link in the entire production line of a steel company. Whether it is safe and efficient is directly related to whether the production runs smoothly. The refractory materials used in ladles in normal steel mills are mainly shaped refractory materials such as clay bricks and high alumina bricks. Brick lining materials often have brick cracks and steps, which easily cause molten iron slag to fall, which in turn leads to sticky slag, especially at the mouth of the molten iron ladle. Obviously, the harm is that the center of gravity of the ladle will be unstable, desulphurization and slag removal will not be possible, and even the iron cannot be completely added to the converter, and the slag must be removed offline, resulting in a decre...

AI Technical Summary

Problems solved by technology

[0003] Aiming at this, the present invention has developed a special casting material for ladle working lining with good spalling resistance, corrosion resistance, erosion resistance and good slag resistance. The use of this material can greatly reduce the slag sticking condition of the ladle. There is ladle castable but its material is Al 2 o 3 - SiC-C-based castables, which can adapt to the operating temperature of the ladle, and have higher strength can improve their service life, so they are used by some manufacturers. The disadvantages are that they are easy to oxidize and have poor slag resistance. The casting of the present invention Al 2 o 3 -SiO 2 -ZrO 2 The castable as the main component is a good solution to this problem