Views: 0 Author: Site Editor Publish Time: 2025-06-11 Origin: Site
Silicon brick and refractory brick are two different types of refractory materials, and they are significantly different in composition, performance and application fields. The following are their main differences:
Silicon brick:
The main component is silicon dioxide (SiO₂), and its content is usually above 93%.
It belongs to acid refractory material and has good corrosion resistance of acid slag.
Refractory bricks:
The composition is diverse, including silicon-aluminum series, alkaline series, carbon-containing refractory bricks and so on.
It can be divided into acidic, alkaline and neutral refractories. For example, clay bricks are mainly composed of mullite and Shi Ying, while magnesium bricks are mainly composed of magnesium oxide.
Silicon brick:
High fire resistance, usually at 1690℃-1730℃.
The softening temperature of load is close to its fire resistance, which is generally 1620℃-1670℃.
The volume stability is good at high temperature, but the thermal shock stability is poor.
Refractory bricks:
The fire resistance varies from kind to kind, generally at 1580℃-1800℃.
The fire resistance of alkaline refractory bricks (such as magnesia bricks) can reach 2000℃-2200℃.
Silicon brick:
It has good corrosion resistance to acidic slag and gas.
The corrosion resistance to alkaline slag is poor.
Refractory bricks:
Corrosion resistance varies with the composition. For example, alkaline refractory bricks have strong corrosion resistance to alkaline slag, while high alumina bricks have certain resistance to both acidic and alkaline slag.
Silicon brick:
Widely used in coke ovens, glass furnaces, hot stoves, ceramic firing kilns and other high-temperature equipment.
It is especially suitable for parts that need acid corrosion resistance.
Refractory bricks:
It has a wide range of applications, including metallurgy, building materials, chemical industry, electric power and other fields.
Different types of refractory bricks are suitable for different high-temperature environments. For example, clay bricks are often used in furnaces and flues with lower temperatures.
Silicon brick:
Thermal shock stability is poor, and cracks are easy to occur when the temperature changes sharply.
Refractory bricks:
Thermal shock stability varies with types, for example, silicon carbide bricks and graphite materials have better thermal shock stability.
Silicon brick:
Thermal conductivity is good, and it increases with the increase of temperature.
Refractory bricks:
Thermal conductivity varies with composition and structure, for example, carbon refractory bricks have high thermal conductivity.
Silicon brick is a kind of high-purity acid refractory, which is suitable for high temperature and acid environment, and has high refractoriness and good high temperature stability. Refractory brick is a broader concept, including various compositions and types of refractory materials, which are suitable for different high-temperature environments and application requirements.
