Refractory prefabricated parts solve common problems such as limited on-site construction conditions and inconsistent construction quality by replacing traditional on-site fabrication with controlled factory production. Their dense internal structure and excellent structural integrity at high temperatures significantly reduce the risk of furnace lining cracking and detachment.
Depending on operating conditions, refractory prefabricated components can be designed as integral blocks, assembled modules, or special-shaped structures. They are suitable for complex environments involving high temperatures, severe corrosion, and heavy wear, and are particularly suitable for industrial furnace projects that require short construction times and high reliability.
Refractory prefabricated parts can be manufactured based on customer requirements and drawings. Using materials such as high-alumina, corundum, corundum–mullite, and silicon carbide wear-resistant castables, both standard and custom-shaped prefabricated components can be produced.
The prefabricated parts are formed by vibration molding. Various additives and micro-powders are used to improve the workability of the material, ensuring strong bonding between coarse and fine particles and effective filling of micropores. This significantly reduces porosity and increases bulk density.
After firing, the compressive strength is significantly improved, and the product exhibits excellent wear and impact resistance. It is widely used in industrial furnace and kiln projects and has proven excellent performance in practical applications.
Main physical and chemical properties of Refractory prefabricated parts
|
Indicators/project |
HF-160Z |
HF-135Z |
HF-130Z |
|
Al2O3 % ≥ |
80 |
65 |
60 |
|
Bulk density g/cm³≥ |
2.8 |
2.55 |
2.40 |
|
Apparent porosity % |
19 |
20 |
21 |
|
Compressive strength Mpa ≥ |
97 |
80 |
70 |
|
Wear resistance cm³≤ |
5 |
6.5 |
8 |
|
Thermal shock stability, times ≥ (1000℃, water cooling) |
25 |
20 |
20 |
■Accurate dimensions and consistent performance
■Easy installation and improved construction efficiency
■Short construction time and lower overall cost
Refractory prefabricated parts are manufactured in specific shapes based on application requirements, making installation faster and more efficient while eliminating many of the on-site construction steps required for castable refractory materials.
In contrast, castable refractories require mold installation before pouring, followed by initial and final setting, and then mold removal and curing, which results in a longer construction process.
Refractory prefabricated parts can be produced using various types of refractory castables and refractory plastics.
There are also significant differences between the two in terms of the production process. Refractory prefabricated parts are typically manufactured by selecting suitable raw materials based on customer requirements, preparing the castable mix, and thoroughly mixing the materials. The mixture is then poured into precast molds and vibrated to form the required shape. The products are cured under controlled temperature conditions and demolded after approximately three days.
● Industrial boilers, air caps, and furnace domes
● Metallurgical heating furnaces and soaking furnaces
● Waste incinerators and rotary kilns
● Petrochemical cracking furnaces and reactors
● Cement kilns and critical components of thermal equipment
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