The rich manganese slag molten iron ladle forms in an acidic environment, and the slag as a whole is subject to weak acid and neutral erosion, while manganese is alkaline and will accelerate chemical penetration erosion. The composition of the rich manganese slag molten iron ladle is basically a ratio of 2:1 of rich manganese slag and molten iron. Under this complex erosion atmosphere, choosing the material for the ladle lining is extremely crucial.
Generally, refractory bricks are used as the lining more frequently. When using refractory bricks as the lining, it is necessary to consider the erosion atmosphere. Clay bricks and high alumina bricks have weak anti-erosion capabilities and are not recommended. The slag line area has a high ratio of slag to iron, and the slag volume accounts for a large proportion. The slag line area is a severely damaged area. If using refractory bricks as the lining, it is best to choose aluminum-carbon silicon carbon bricks. The characteristics of aluminum-carbon silicon carbon bricks are stability and suitability for frequent thermal cycling use.
The best lining material for the ladle is clay bricks or grade three high alumina bricks as the permanent layer, water glass combined aluminum-carbon silicon carbon bricks as the working layer of the ladle wall, resin combined aluminum-carbon silicon carbon bricks for the ladle bottom, low-carbon magnesium carbon bricks for the slag line area, and aluminum-carbon silicon carbon fire clay for the joint fire clay.
If there is a mold, aluminum-carbon silicon carbon casting material can be used as the lining. However, the content of silicon carbide and carbon must not be lower than 17%. It is best to have a content of 12%-14% for silicon carbide and 5% for carbon, with 2.5% of metallic silicon for oxidation resistance. After vibrating the mold and removing the mold after 1-2 days, it should be baked in the baking oven according to the baking curve of the manufacturer before being put into use.
When choosing aluminum-carbon silicon carbon bricks or aluminum-carbon silicon casting material for the ladle lining, it should be based on the on-site tools. Casting material must have a mold and a baking oven. The casting material lining has strong air tightness and is convenient for maintenance. Each has its own advantages. In relative terms, using bricks will take longer than using casting material.