The fire resistance temperature of nozzle brick varies with different material composition and production technology. The following are the fire resistance temperature ranges of several common materials:

I. High-alumina nozzle brick

The fire resistance of high-alumina nozzle brick is high, usually reaching 1750℃ to 1790℃. This kind of material belongs to advanced refractory and is widely used in gating system, including nozzle brick.

II. Aluminum-carbon nozzle brick

Aluminum-carbon nozzle brick has high fire resistance and good corrosion resistance, and its fire resistance temperature is usually above 1600℃. This material shows excellent performance in continuous casting process, which can effectively prevent molten steel splashing and turbulence.

III. Zirconium-carbon nozzle brick

The refractory temperature of zirconium-carbon nozzle brick is higher, usually above 1800℃. This material has higher high temperature strength and good corrosion resistance, and is suitable for occasions with higher requirements on fire resistance.

IV. Nozzle bricks containing aluminum oxynitride

Refractory materials containing aluminum oxynitride have extremely high refractoriness, which will not melt or decompose when the temperature does not exceed 2000℃. This material has excellent corrosion resistance and thermal shock resistance, and is suitable for contact with molten steel and slag.

To sum up, the fire-resistant temperature range of nozzle brick ranges from 1600℃ to 2000℃, depending on the materials used and the production process.