65 Zircon Brick (ZrO₂ ≥ 65%) is manufactured using carefully selected, high-purity zircon sand (ZrSiO₄), formed under high pressure, and sintered at a high temperature of 1600°C. It serves as a premium refractory material for ultra-high-temperature and highly corrosive environments—such as those found in glass kilns and metallurgical furnaces—combining four core advantages: corrosion resistance, thermal stability, high strength, and low blistering potential.
✅ Core Performance • Robust Capabilities
Ultra-High Corrosion Resistance; Resists Glass Melt Erosion: Stable ZrO₂ content of ≥ 65%; its dense structure effectively resists erosion by soda-lime-silica and borosilicate glass melts, with an erosion rate of ≤ 0.5 mm/24h. It withstands alkali vapors and the scouring effects of batch carryover, acts as an effective barrier against AZS and silica bricks, and completely eliminates interfacial reactions.
High-Temperature Stability; Strong Thermal Shock Resistance: Refractoriness Under Load (RUL) is ≥ 1650°C, maintaining structural stability at 1550°C. Features low thermal expansion (4.0–4.5 × 10⁻⁶/°C), offering excellent resistance to thermal shock and spalling, making it ideal for applications involving temperature fluctuations during firing changes, kiln startups, and shutdowns.
Dense & High-Strength; Abrasion & Permeation Resistant: Bulk density of ≥ 3.7 g/cm³ with an apparent porosity of ≤ 18%. Exhibits a cold crushing strength of ≥ 100 MPa, minimal high-temperature creep, and strong resistance to mechanical abrasion and the permeation of molten metals.
Low Blistering • High Purity: Produced using high-purity raw materials and precision manufacturing processes, it ensures low blistering and the absence of "stones" (inclusions) within the glass melt, thereby safeguarding the quality of the finished glass product. Features high electrical resistivity, making it suitable for applications involving electrodes and thermocouple ports in electric melting kilns.
Chemical Stability; Extended Service Life: Resistant to acids, alkalis, and flue gas corrosion; remains chemically inert and does not react with surrounding materials at high temperatures. Compared to standard zircon bricks, it offers a service life increase of over 30%, significantly reducing the frequency of kiln shutdowns for maintenance and repairs.
✅ Core Application Scenarios
Glass Kilns: Burner blocks/ports, crowns, breastwalls, tank walls/bottoms, forehearths/channels, suspended bricks, expansion joint bricks, and thermocouple/observation port blocks. Suitable for use in both oxy-fuel kilns and air-fired kilns.
Metallurgical Furnaces: Slag lines, steel ladle linings, and critical components in continuous casting—resistant to steel slag erosion.
Others: Chemical reactors, hot zones in waste incinerators, and high-temperature zones in ceramic kilns.
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