Electrofused Silica Brick

High-Grade Zero Expansion Silica Brick: Crack-Resistant at 1680℃, the Optimal Refractory for Furnace Hot Repair

Application

For lining the roofs of coke ovens, hot blast stoves, glass furnaces, tunnel kilns, melting furnaces, metallurgical electric furnaces, and carbon furnaces

Description

Fused silica brick is a special refractory material renowned for its ultra-low thermal expansion rate.
Composition: High-purity silica (SiO₂ content >99%), High-temperature sintering ensures an exceptionally stable internal structure.
Key Features:
Near-zero thermal expansion – maintains dimensional stability under extreme temperature fluctuations.
Superior thermal shock resistance – minimizes cracking or spalling caused by rapid heating/cooling.

Specifications

Item		RS-LPZ-99	RS-LPZ-98
SiO2% ≥		99	98
Refractoriness °C ≥		1700	1690
Refractoriness Under Load °C ≥		1520	1500
Thermal Expansion	1500°C, 2h	+0,1 -0,4
Apparent Porosity %		23
CCS MPa ≥		6,5	6,8
Bulk Density g/cm³ ≥		1,85	1,9
Color		white	white
Thermal Shock Resistance 1200°C		5	5
Thermal Conductivity 1200°C W/(m·K)		1	1

Features

🛡️

Erosion Resistance

High-purity SiO₂ – exhibits outstanding erosion/acid resistance.
Low flux index (Al₂O₃ + 2R₂O): <0.3%.

🌱

Pollution-free

Fe₂O₃ content <0.1%. Zero contamination to products (e.g. glass melt)

0️⃣

Zero thermal expansion

No expansion joints required during repair
Enhances structural tightness of masonry

✅

Thermal stability

No cracking during hot repairs
No spalling/flaking occurs after repair

Applications

Glass Furnace – Forehearth cover plate, Batch charging arch, Outer arch, Throat arch, Port neck arch, Inspection port
Coke Oven – Coke oven door, Gas ascension pipe, Coking chamber, Combustion chamber
Metallurgical Electric Furnace – Furnace Roof
Hot Blast Stove – Stove Dome
Tunnel Kiln – Kiln Roof
Thermal Process Equipment – Hot maintenance