PRODUCT DESCRIPTION

Fused Cast Alpha Alumina Block SR-A

Description

Fused Cast Alpha Alumina Block (also known as Fused Cast Alpha Corundum Block) is a premium-grade refractory material engineered from ultra-pure alumina. Melted in an electric arc furnace at temperatures exceeding 2100°C and expertly cast into shapes, its primary crystalline phase is alpha alumina. This microstructure grants the material exceptional chemical stability and mechanical strength. As a high-end flagship product in the specialty alumina category, it features an ultra-dense crystalline matrix, low blistering potential and superior erosion resistance, making it an indispensable solution for glass industry and metallurgical industry.

Advantages

l  Ultra Pure & High Density: Al₂O₃ content exceeds 98.5% with a dense bulk density over 3.5g/cm³. It features an exceptionally low bubble evolution rate, preventing defects and bubbles to ensure crystal-clear glass quality.

l  Exceptional Thermal Stability: With a melting point of 2250℃, it remains perfectly rigid under intense heat. It withstands operational temperatures above 1790℃ and maintains strong load-bearing capacity without shifting or deforming.

l  Zirconia-Free & Good Erosion Resistance: Contains zero added zirconia. It completely eliminates the risk of structural cracking caused by zirconia phase changes at high temperatures. It is the premier choice for protecting high-purity glass and metals from zirconia and iron contamination.

l  High Mechanical Strength: The tightly interlocking α-alumina crystals create an incredibly tough matrix. This high mechanical strength delivers outstanding resistance against continuous friction, heavy mechanical wear, and high-velocity liquid erosion.

Applications

l  Glass Furnaces

1. Sidewalls, bottoms, and feeder/forehearth channels of working end. In this temperature range, it exhibit better glass-erosion resistance than fused cast AZS blocks. It guarantees zero contamination to the molten glass.

2. Oxy-Fuel furnace superstructures like the furnace crown and breast walls. It withstands the aggressive chemical attacks of highly concentrated, volatile alkaline vapors and hot water vapor. Replacing traditional silica bricks with our alpha alumina blocks drastically extends the overall campaign life of the furnace.

3. High-End Glass, like electronic glass (TFT-LCD) and ultra-white photovoltaic (PV) solar glass, cooling and forming stages. Featuring an exceptionally low bubble evolution rate, it completely eliminates the risk of refractory-induced defects such as stones, cords, or bubbles, securing the pristine optical clarity and high yields required for premium glass products.

l  Metallurgical Industry

1. High-titanium slag furnaces and titanium sponge reduction furnaces. Tightly interlocked α-Al₂O₃ crystals resist dual physical-chemical wear, ensuring stable, leak-free tapping.Highly dense structure blocks the deep infiltration of volatile titanium slag, significantly extending lining service life. It can also prevent spalling and safeguard absolute titanium purity.

2. Metallurgical Electrolytic Cell

   TECHNIQUE DATA

Physical and chemical index