Tundish Magnesium Calcium Coating

The tundish magnesia-calcium coating is made of brick-making magnesia and has low porosity, high flexural strength at room temperature, but poor corrosion resistance; while the coating made of fused magnesia has low flexural strength at room temperature and corrosion resistance. It has good resistance to slag permeability, but its resistance to slag permeability is very poor. 2. As the CaO content increases, the linear shrinkage of the coating increases, the resistance to slag permeability decreases, the cold flexural strength shows a downward trend, and the cold compressive strength is basically nothing Change; at the treatment temperature of 1100°C, the apparent porosity of the coating increases with the increase of CaO content, while at the treatment temperature of 1500°C, the apparent porosity of the coating decreases with the increase of its content. 3. With the addition of Additive A With the increase of additive B, the bonding strength of the coating increases, and the flexural strength at room temperature increases; as the amount of additive B increases, the volume density of the coating decreases, and there is an optimal value for the flexural strength. 4. The use of magnesia-calcium spray coating has better effects on molten steel It has the effect of purifying steel. It can greatly reduce the content and particle size of inclusions in steel, and has significant economic benefits.