Guy Nielson Co. | Refractory Materials | Refractory Contractors

Guy Nielson Company warehouses and supplies a wide variety of refractory materials. These materials include firebrick, rotary kiln brick including magnesite and high alumina, monolithics, plastics including phosphate bonded and air set, insulation including conventional, gunned and ceramic, gunned and shotcreted materials. Finally, we also carry a wide selection of stainless steel anchors and ceramic anchor brick.

We have warehouses in Idaho, Oregon, and Washington State to assist you with your refractory needs.

 

 

Refractory materials are specialized materials that exhibit high resistance to extreme temperatures, mechanical stress, and chemical reactions. They are used in various industrial applications where there is a need to maintain structural integrity and functionality under harsh conditions. The primary purpose of refractory materials is to provide insulation and protection to equipment, structures, and vessels operating at high temperatures.

Key characteristics of refractory materials include:

1. High Melting Point: Refractories are designed to withstand temperatures significantly higher than those experienced by common materials. This property allows them to remain solid and functional at temperatures where many other materials would melt or degrade.

2. Thermal Insulation: Refractories often have low thermal conductivity, meaning they minimize heat transfer through the material. This is essential for maintaining the stability of structures and equipment and preventing heat loss.

3. Chemical Stability: Refractory materials are chemically inert and resist reactions with various substances, including molten metals, slags, and gases, that may be present in high-temperature processes.

4. Mechanical Strength: Refractories must possess sufficient mechanical strength to endure the stresses and strains encountered in industrial processes, including thermal expansion and contraction.

5. Abrasion Resistance: Many refractory applications involve contact with abrasive materials, so good resistance to wear and erosion is crucial.

6. Thermal Shock Resistance: Refractories should be able to handle rapid temperature changes without cracking or breaking. This property is particularly important in applications where cyclic heating and cooling occur.

7. Classification: Refractory materials are classified based on their composition, properties, and intended applications. They can be categorized into acidic, basic, and neutral refractories. Each type is suited for different environments and chemical conditions.

8. Applications: Refractories are used in a wide range of industries, including steelmaking, glass manufacturing, cement production, petrochemical processing, ceramics production, and more. Some common applications include lining furnaces, kilns, reactors, and incinerators.

   Types of refractory materials include:

1. Fireclay Refractories: Made from clay and other materials, these are used in lower temperature applications.

2. Silica Refractories: Composed of high-purity silica, they are ideal for high-temperature environments.

3. Magnesite Refractories: Made from magnesite (magnesium carbonate), they are well-suited for basic environments.

4. Dolomite Refractories: These combine magnesite and dolomite (calcium magnesium carbonate) and are used in basic refractory applications.

5. Chrome Refractories: Containing chromium oxide, they have high resistance to corrosion and can withstand aggressive chemical environments.

6. Alumina Refractories: Made from aluminum oxide, they are highly versatile and can be used in both acidic and basic conditions.

7. Carbon-Based Refractories: These include materials like graphite and carbon bricks, suitable for extreme temperature and reducing conditions.

8. Insulating Refractories: These have low thermal conductivity and are used primarily for insulation purposes.

Refractory selection depends on factors such as the specific temperature range, chemical environment, mechanical stresses, and application requirements.