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| Summary | TUNCAST is a low-density, monolithic, spray that forms the working lining in the tundish. |
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| Description | TUNCAST is a chemically basic, sprayable lining material combining magnesia filler of selected granulometry, specific bonding materials and fibrous constituents to form a mass with optimum rheological properties when mixed with the correct amount of water. On curing, the sprayed lining develops a chemical bond, which is supplemented by a ceramic bond in contact with liquid steel. |
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| Application | The TUNCAST powder is first mixed with a predetermined amount of water in a continuous kneader mixer with an Archimedean screw, and then sprayed onto the tundish permanent refractory lining using purpose designed spraying equipment. A variable speed controller permits the slurry mix to be delivered to the tundish at up to 70Kg per minute. After installation, the lining is cured by heating it over a predetermined curing cycle. The cured lining can then be used as either a cold start or hot tundish system after full preheating to around 1000°C. |
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| Function | The insulating properties of a TUNCAST spray tundish lining ensure that a good temperature profile is maintained during casting, and being a basic material, steel cleanliness is not impaired. The product is designed to provide a friable residue between the skull and the permanent lining after the casting is over, to facilitate smooth deskulling. |
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| Benefits | ![]() | Monolithic construction reduces the chances of metal penetration. | ![]() | Lower density provides insulating properties superior to other monolithic lining systems. | ![]() | TUNCAST can be used with or without preheat after curing. | ![]() | Lining thickness can be selectively varied at critical tundish areas like slag line and ladle stream impact zones to facilitate long sequence casts. | ![]() | More than thirty hours of casting can be achieved under the right conditions. |
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