Factory Supply Blast Furnace Refractory Bricks Silicon Carbide
Bricks Produced By Rongsheng Refractory
Product Description of Factory Supply Blast Furnace Refractory
Bricks Silicon Carbide Bricks Produced By Rongsheng Refractory
The refractory materials industry is an essential foundational
industry that supports high-temperature technologies, with a
particularly close relationship to the steel industry. New
advancements in high-temperature industries, especially in steel
smelting technology, have driven the technical progress of the
refractory materials industry. In turn, this progress in refractory
materials technology ensures the implementation of new technologies
in high-temperature industries. The stable, high-yield, and
long-lasting operation of various furnaces in the steel industry
relies heavily on refractory materials. Different furnaces have
different requirements for refractory materials, depending on their
purpose and operating conditions. Moreover, the various types of
refractory materials display distinct basic properties due to
differences in chemical composition, microstructure, and production
processes.
Currently, there are many types of refractory bricks used in blast
furnaces. Generally, high-performance clay bricks or high alumina
bricks are used for the upper and middle parts of the furnace body,
while carbon-based products, such as silicon carbide bricks, are
used for the lower part of the furnace body, belly, and bosh.
Silicon carbide refractory bricks are a type of high alumina
refractory material made from silicon carbide (SiC). They offer
excellent wear resistance, corrosion resistance, high-temperature
strength, high thermal conductivity, low coefficient of thermal
expansion, and good thermal shock resistance.
Silicon carbide refractory bricks can be classified based on the
SiC content and the type of bonding phase. The properties of these
refractory bricks largely depend on the bonding phase. According to
the bonding phase, silicon carbide refractory bricks can be divided
into:
Oxide-bonded: using aluminosilicate or silicon dioxide as the
bonding phase;
Nitride-bonded: using silicon nitride (Si3N4), silicon oxynitride
(Si2ON2), or sialon as the bonding phase;
Recrystallized: where silicon carbide particles are directly bonded
through recrystallization.
Semi-silicon carbide refractory bricks can be further divided into
several types, such as clinker silicon carbide refractory bricks +
high alumina silicon carbide refractory bricks, zircon silicon
carbide refractory bricks, silicon carbide graphite refractory
bricks, mullite silicon carbide refractory bricks, and corundum
silicon carbide refractory bricks.
The silicon carbide refractory bricks produced by Rongsheng
Refractory for the chemical industry are made from high-quality 98%
SiC as raw material, using oxide as a bonding agent and undergoing
high forming and high-temperature firing. They feature
high-temperature strength, excellent wear resistance, corrosion
resistance, high thermal conductivity, low thermal expansion
coefficient, good thermal shock resistance, and strong thermal
radiation properties.
Physical And Chemical Indicators of Silicon Carbide Bricks For
Blast Furnaces:
| Item Name | Unit | Blast Furnace Silicon Carbide |
|---|
| SiC | % | 35-55 |
| Apparent Porosity | % | 18-20 |
| Refractoriness | °C | >1790 |
| Refractoriness Under Load | °C | 1550 |
| Cold Crushing Strength | MPa | 60 |
| Thermal Conductivity | W/(m·K) at 1200°C | 6-8 |
| Thermal Stability | Times (1100°C Water Cooling) | 50 |
