High Performance Alumina-magnesia Refractory Castable for Steel Ladles

November 21, 2018

Alumina-magnesia refractory castable for Steel ladles

The alumina-magnesia refractory castable is a refractory castable prepared by using high grade bauxite clinker as aggregate, high bauxite clinker and magnesia as powder, and sodium water glass as binder.

The alumina-magnesia refractory castable has been widely used in medium and small steel ladles, with an average age of 60-80 times. The consumption of ton steel refractories is reduced by about 70% compared with fireclay bricks. The alumina-magnesia refractory castable has long service life, safety and stability, and is an ideal refractory material for ladles.

The raw material of the alumina-magnesia castable for ladle is basically the same as the alumina-magnesia refractory ramming material. In order to obtain room temperature strength, sodium fluorosilicate should be added as a coagulant. The aluminum-magnesium castable for ladle has a lower refractoriness under load due to the combination of the magnesia powder to form some low-baked materials which can react with the water glass and sodium fluorosilicate.

After removing the adhered metal and cleaning the working surface of the alumina-magnesia refractory castable, it can be repaired times as long as the working surface is not completely melted, thereby reducing the amount of refractories during the new spray construction and reducing the amount of waste bricks produced by the ladle by about 30%.