What are the refractory materials for cupola?

What are the refractory materials for cupola? The cupola is also known as the iron-making furnace or the stir-frying furnace, and it is mainly equipment for making iron. The working temperature of cupola is generally 1400~1600℃. The furnace body of the cupola is composed of furnace bottom, furnace body, forehearth and bridge.

The bottom of the cupola is in direct contact with the hot molten iron and bears the quality of all the charge. Therefore, ASC ramming material or carbon ramming material and products should be used to help improve the life of the cupola bottom.

The upper working layer of the cupola is mechanically impacted and worn by the charge during charging, so it is built with fan-shaped hollow iron bricks, and the outside is filled with quartz sand.

The lower working layer of the cupola, especially the coke combustion zone at the tuyere and above, has a higher temperature and is subject to slag erosion, air flow erosion and charge wear. Therefore, corrosion-resistant magnesia chrome bricks or magnesia brick tails are used. No.

The oxidizing atmosphere of the lower working layer of the furnace body is weakened, and ASC ramming material and its products can be used. Other parts of the furnace body can be made of clay bricks or semi-silica bricks due to the lower temperature. The permanent layer or insulation layer of the furnace body is generally made of clay insulation bricks or floating bead bricks.

Forehearths and bridges are generally built with clay bricks or high alumina bricks, and the parts in contact with molten iron are made of ASC ramming materials; the parts in contact with slag should be made of ASC ramming materials, preforms or bricks with higher silicon carbide content. ; Insulation layer or permanent layer with clay bricks or light clay bricks or floating bead bricks.

Grade Material Use part

CTL-1 Carbon Ramming Material Furnace Bottom

CTL-2 clay brick furnace bottom

CTL-3 ASC Ramming Material Furnace Bottom

CTL-4 Magnesia Chrome Brick

CTL-5 Magnesia Chrome Brick

CTL-6 magnesia brick in the middle of the furnace body

CTL-7 Corundum Brick in the middle of the furnace body

CTL-8 Clay bricks in the middle of the furnace body

CTL-9 Clay bricks in the middle of the furnace body

CTL-10 hollow iron brick top of the furnace body

CTL-11 Clay brick, lower part of the furnace body