In this context insulation refers to covering agents suitable for ladle and tundish. Forming passive layers they are slag formers with high melting points. INTOCAST is able to provide a great number of customer-oriented solutions. From own granulation line INTOCAST supplies spray-dried basic products while acid insulation materials are also on offer.
Besides economic considerations the selection of an acid or a basic product is often dependent on:
- Steelmaking quality instructions and specifications,
- Compatibility of insulation product with refractory linings, and
- Required degree of liquid steel protection against ambient conditions.
INTOCAST offers the BASOTHERM suite of products as basic covering agent in granule or powder form. The lower-cost powder is a fully synthetic product on CaO/MgO base, suitable for both ladle and tundish. In tundish applications most commonly used are the more sophisticated granules with 90% MgO. They are particularly low in Silicate content and demonstrate superior insulation properties as well as excellent runability.
Rice husk ash is consumed in acid regimes of both ladle and tundish applications. This insulation agent consists entirely of natural raw materials. INTOCAST sources products from a number of different productions around the globe. Labelled as TAM this biogenous silica is supplied as powder. Dust-free product versions are also on offer as granules or pellets. The low Carbon content in INTOCAST rice husk ash makes it suitable also for Carbon sensitive steel grades.
For more demanding steelmaking challenges INTOCAST has developed complex solutions. This is when active metallurgical work is due to be performed under a passive layer of insulating tundish cover. In a multi-layer concept rice husk ash is put on top of synthetic INTOCAST slag conditioners. This way a last-minute opportunity is created to scavenge steel impurities with reactions promoted at the interface of active slag and liquid steel.
Basic, insulating tundish and ladle cover
Granulated basic tundish and ladle cover
Acid, insulating tundish and ladle cover
ISOPERL, TAM SGL
Granulated, acid tundish and ladle cover
Pelletised rice ash (dust free)