What Is Gt-13Nl Castable?

GT-13NL castable is a high-performance refractory castable mainly used in high-temperature industrial furnaces, especially those that require resistance to alkali metal oxide corrosion. The following is a detailed introduction to GT-13NL castable:

1. Composition and characteristics

GT-13NL castable is made of aluminum silicate material as refractory aggregate and powder and is formulated by adding aluminate cement and appropriate amounts of admixtures. This castable has the following notable properties:

Alkali corrosion resistance: It can effectively resist the erosion of alkali metal oxides (such as K₂O, Na₂O) at medium and high temperatures, protecting the internal structure of the kiln from damage.

High-temperature performance: It remains stable in high-temperature environments, reacts with alkali metal oxides to generate a high-viscosity liquid phase, and forms a glaze-like protective layer further to prevent the penetration and erosion of alkali metals.

High strength: It has high normal temperature compressive strength and flexural strength, and can withstand mechanical and thermal stress during the kiln operation.

Good constructability: It can be constructed by adding water and stirring. Forming a uniform pouring layer is easy and has high construction efficiency. ###

2. Physical and chemical indicators

According to relevant information, the physical and chemical indicators of GT-13NL castable include but are not limited to:

Al₂O₃ content: ≤48%

SiO₂ content: ≥50% Volume density (110℃×24h): ≥2.10g/cm³

Normal temperature compressive strength: ≥70MPa (110℃×24h)

Normal temperature flexural strength: ≥7MPa (110℃×24h) These indicators ensure that GT-13NL castables can be used in high-temperature environments.

stability and durability.

3. Application Scenarios

GT-13NL castable is widely used in various high-temperature industrial kilns, especially those parts that need to resist the corrosion of alkali metal oxides, such as cement kiln preheaters, tertiary air ducts, etc. Its excellent performance and stable quality have been recognized and trusted by many cement production companies.

4. Summary

GT-13NL castable is a high-performance refractory castable that plays an important role in high-temperature industrial kilns with its excellent alkali corrosion resistance, high-temperature stability, and workability. Its wide application not only improves the operating efficiency and stability of the kiln but also reduces maintenance costs and safety hazards.