As a key refractory structure in the steelmaking process, Refractory Materials For Cast Ladle Lining must have good erosion resistance, thermal shock resistance, slag resistance and high temperature strength. According to the structure of the working layer and the use position, the lining of the ladle usually includes the working layer, permanent layer and insulation layer, and the refractory materials used in different parts are also different.
The following is the classification of refractory materials commonly used in ladle lining:
一. Working layer (the part in contact with molten steel and slag)
Need to be resistant to high temperature and corrosion of molten steel and slag:
1. Magnesium carbon brick: commonly used in ladle wall, ladle bottom and ladle mouth area
Features: good thermal shock resistance and strong corrosion resistance
2. Mattone ad alto tenore di allumina: suitable for low-requirement ladle or transition area
Low cost and medium service life
3. Aluminum magnesium carbon brick (Al-Mg-C Brick): can be used for ladle top and impact area
Good overall performance
4. Carbon-free castable / low-carbon self-flowing castable (LC Castables: used for large or refined ladle
Convenient construction, good integrity
5. Functional refractory materials (such as quick-change ladle nozzles, seat bricks)
Use sintered or electrofused materials to enhance anti-scouring and anti-erosion performance
二. Permanent layer (supporting working layer, providing strength and insulation)
Not high temperature requirements, focusing on support and insulation:
1. Fireclay Brick: cheap, easy to construct
2. High alumina brick: higher strength, extended ladle life
3. Insulating refractory brick or lightweight refractory castable: reduce heat conduction to the ladle shell
三. Insulating layer (outermost layer, close to the ladle)
Reduce heat loss and protect the ladle shell:
1. Alumina silicate fiberboard / ceramic fiber blanket: excellent insulation performance
2. Lightweight insulation brick / perlite board and other insulation materials
3. Supplementary materials:
Dry vibration material (dry ladle lining): used for integral casting of ladle bottom or ladle wall, fast construction
Prefabricated blocks (Prefab block): used for impact zone or seat brick to shorten maintenance time
Dear customers, if you have any project related to continuous casting ladle or other high temperature equipment that requires refractory lining materials, please contact KERUI Refrattario.
