PRODUCT DESCRIPTION

FUSED CAST HIGH ZIRCONIA BLOCK

Fused cast high zirconia blocks is manufactured through a precise electric arc furnace melting and specialized casting process, forming a dense, tightly interlocked microstructure composed of about 89% zirconia crystals and 10% vitreous phase. It is engineered specifically to withstand the most aggressive chemical attacks and extreme thermal conditions in high-performance glass melting furnaces.

Advantages

Extreme Corrosion Resistance: Engineered with ultra-high purity zirconia, our blocks feature a ZrO2 content more than 88%. It is comprised of 89% baddeleyite crystals, delivering a chemical resistance against corrosive molten glass that far outperforms AZS blocks. This drastically extends the service life of critical furnace zones.

Outstanding Low-Contamination Properties: Engineered with a near-zero risk of bubbling, striae, or cord potential, this material prevents refractory shedding and impurity contamination in premium molten glass. It serves as the definitive core material for melting high-quality, specialty glass formulations.

Superior High-Temperature Performance: Select grades exhibit exceptionally high electrical resistivity at elevated temperatures. This allows them to function directly as electrode blocks in electric glass-melting furnaces, perfectly adapting to extreme conditions characterized by ultra-high temperatures and strong electric fields.

Excellent Structural Stability: Produced via precise electric arc furnace melting and fused casting, the blocks present a dense, highly homogeneous microstructure. It exhibits no structural peeling or spalling under intense thermal stress, ensuring long-term operational stability in high-wear zones such as furnace sidewalls, bottom paving, and the throat.

Applications

l  Critical Zones in Float & Specialty Glass Furnaces

Our high zirconia blocks are widely deployed in the most severely eroded, high-wear zones of float glass and specialty glass melting furnaces, including:

The Throat: Resisting continuous, high-velocity molten glass flow.

Hotspot Sidewalls: Withstanding the highest thermal and chemical stress in the furnace.

Doghouse Corners: Enduring extreme mechanical abrasion and batch material volatility.

l  Advanced Electro-Melting Applications

Specifically engineered high electrical resistivity, they are designed for direct use as electrode blocks, paving and sidewall in electric glass-melting furnaces. They deliver flawless performance under extreme conditions characterized by ultra-high temperatures and powerful electric fields.

l  High-Temperature Metallurgical & Chemical Kilns

Beyond glass manufacturing, this premium refractory extends to high-temperature linings in the metallurgical and chemical industries. It provides an impenetrable defense against aggressive chemical attack, severe slag corrosion, and intense physical impact in extreme thermal environments.

   TECHNIQUE DATA

Physical and Chemical Index