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Guy Nielson Co. | Pre Fired Refractory Shapes 


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Since the building of our pre-cast shop in 1993, we have cast and fired scores of materials and thousands of shapes. With detailed casting procedures and records to computerized firing equipment

GNC can guarantee consistent quality shapes.

GNC incorporates various form systems to include our CNC hotwire foam cutting machine.

Computer controlled, gas fired furnace allows us to handle large shapes and fire up to 1800 degrees Fahrenheit.


A "pre-fired refractory shape" refers to a refractory product that has undergone a firing or heating process before it is used in high-temperature applications. Refractories are heat-resistant materials designed to withstand extremely high temperatures, mechanical stress, and corrosive environments. They are commonly used in industrial settings such as furnaces, kilns, incinerators, and reactors.

The term "pre-fired" indicates that the refractory shape has already been exposed to a certain level of heat treatment or firing in a controlled environment before being installed in the intended application. This pre-firing process is done to achieve specific properties and characteristics, such as improved strength, reduced porosity, and increased resistance to thermal shock. It helps to ensure that the refractory material can withstand the extreme conditions it will face during actual use.

Pre-fired refractory shapes are designed to have consistent and reliable properties, making them more suitable for demanding high-temperature applications where standard bricks or castable refractories might not provide the required performance. These shapes can include bricks, tiles, tubes, crucibles, and various custom-designed components.

By undergoing a controlled pre-firing process, these refractory shapes are often more dimensionally stable, have lower residual porosity, and exhibit better thermal conductivity compared to unfired or green refractory materials. This makes them more capable of withstanding thermal cycling, chemical attacks, and mechanical stresses without significantly deteriorating.