Refractory Precast Part

(I) Refractory Precast Components for the Metallurgical Industry

These products are specially designed for high-temperature conditions such as steelmaking, ironmaking, and non-ferrous metal smelting. They offer excellent resistance to slag erosion, thermal shock, and abrasion. Suitable for key parts of various metallurgical furnaces and kilns, they provide essential support for efficient and stable metallurgical operations.

 Precast Components for Steelmaking Systems:

Used in key areas such as ladles, converters, electric arc furnaces, and refining furnaces. Main products include ladle slag weirs, ladle nozzle precast blocks, converter taphole precast components, EAF roof precast blocks, and matching precast components for porous plugs. Made from high-alumina, corundum, and alumina-magnesia materials, they can withstand temperatures above 1600°C, effectively resist erosion and wear from molten steel and slag, and significantly reduce furnace maintenance costs.

 Precast Components for Ironmaking Systems:

Suitable for blast furnaces, hot blast stoves, sintering machines, and related equipment. Main products include blast furnace trough precast components, hot blast stove checker brick precast components, and sintering machine grate bar precast components. With a focus on high-temperature resistance, abrasion resistance, and thermal shock resistance, they can operate long-term in environments involving high-temperature flue gas, molten slag, and molten iron, thereby extending equipment service life.

 Precast Components for Non-Ferrous Metal Smelting:

Designed for smelting furnaces used for copper, aluminum, zinc, and other non-ferrous metals. Products include electrolytic cell lining precast components, furnace wall precast blocks for non-ferrous metal melting furnaces, and flue precast components. They offer excellent resistance to molten metal corrosion as well as acid and alkali corrosion, making them suitable for the complex conditions of non-ferrous metal smelting.

(II) Refractory Precast Components for the Building Materials Industry

These products are used in cement, glass, ceramics, and other building materials production equipment. They primarily address thermal insulation, abrasion resistance, and erosion resistance in high-temperature furnaces and kilns, helping improve production quality and efficiency.

 Precast Components for Cement Kilns:

Mainly used in rotary cement kilns, preheaters, and calciners. Products include kiln inlet guard plate precast components, preheater inner cylinder precast components, calciner burner precast blocks, and tertiary air duct precast components. Made from high-alumina, corundum, and silicon carbide materials, they offer high-temperature resistance, anti-coating performance, and resistance to abrasion, effectively reducing downtime and maintenance frequency of cement kilns.

 Precast Components for Glass Furnaces:

Suitable for tank walls, breast walls, flues, regenerators, and other parts of glass melting furnaces. Products include tank wall precast blocks, breast wall precast components, and regenerator checker precast components. With excellent high-temperature resistance, glass melt erosion resistance, and thermal insulation performance, they ensure stable furnace operation and improve glass product quality.

 Precast Components for Ceramic Kilns:

Designed for ceramic firing kilns and tunnel kilns. Main products include kiln car liner precast components, burner nozzle precast components, and flue precast blocks. These products are lightweight, highly heat-resistant, and resistant to thermal shock. They reduce heat loss, lower energy consumption, and minimize defects in ceramic firing.

(III) Refractory Precast Components for the Chemical and Other Industries

These are used in chemical reaction furnaces, waste incinerators, power boilers, and similar equipment. Product performance is customized based on the operating conditions of different industries to meet diverse requirements.

 Precast Components for Chemical Reaction Furnaces:

Used in reaction and cracking furnaces in fertilizer, coal chemical, and related industries. Products include furnace wall precast blocks, roof precast components, and flue lining precast components. They offer high-temperature resistance, acid and alkali corrosion resistance, and resistance to gas erosion, making them suitable for complex chemical process environments.

 Precast Components for Waste Incinerators:

Developed for the high-temperature and highly corrosive conditions of waste incineration. Products include furnace lining precast components, flue precast components, and hopper precast blocks. Resistant to high-temperature oxidation and slag erosion, they effectively extend incinerator service life and reduce environmental treatment costs.

 Precast Components for Power Boilers:

Suitable for utility boilers, waste heat boilers, and similar equipment. Main products include boiler water wall precast components, furnace lining precast components, and flue precast components. With excellent high-temperature resistance, thermal insulation, and abrasion resistance, they support efficient and safe operation of power generation equipment.

(I) Classification by Forming Process

 Cast Precast Parts

Made from refractory castables through mould casting, vibration forming, curing, and high-temperature firing, these are the most widely used type of precast components. They feature high density, high strength, and stable performance, and can be manufactured into various complex shapes to meet installation requirements of different furnace and kiln parts, such as slag weirs and nozzle precast blocks.

 Rammed Precast Parts

Produced from refractory ramming mixes through manual or mechanical ramming, followed by curing and firing. These products emphasize excellent wear resistance and erosion resistance. They are mainly used in severely worn areas such as furnace bottoms, iron troughs, and launders, for example blast furnace trough precast parts and launder liner precast parts.

 Unfired Precast Parts

Manufactured without high-temperature firing, using only proportioning, forming, and natural or low-temperature curing. They offer advantages of energy savings, high efficiency, and low cost. They are suitable for medium- and low-temperature conditions or auxiliary components, such as insulating lining precast parts and auxiliary flue precast parts.

(II) Classification by Material

 High-Alumina Refractory Precast Parts

Made primarily from high-alumina bauxite with an Al₂O₃ content ≥60%. They offer good high-temperature resistance, thermal shock resistance, and erosion resistance. They are widely used in medium- and high-temperature applications in metallurgy, building materials, and chemical industries, making them the most commonly used material type.

 Corundum Refractory Precast Parts

Based on corundum as the main raw material, with an Al₂O₃ content ≥90%. They provide outstanding high-temperature resistance, slag erosion resistance, and high strength. They are mainly used in severe high-temperature and strong erosion conditions such as steel ladles, glass melting furnaces, and chemical reaction furnaces, serving as a core material for high-end refractory precast components.

 Magnesia-Alumina Refractory Precast Parts

Composed mainly of magnesia and high-alumina materials, combining the slag resistance of magnesia-based materials with the thermal shock resistance of alumina-based materials. They are mainly used in converters, steel ladles, cement kilns, and similar applications, performing well in environments with molten slag, molten iron, and high-temperature flue gas.

 Silicon Carbide (SiC) Refractory Precast Parts

Using silicon carbide as the main raw material, these products offer excellent wear resistance, high-temperature resistance, and high thermal conductivity. They are mainly applied to high-temperature and high-wear areas such as furnace bottoms, iron troughs, and burner nozzles.

 Insulating Refractory Precast Parts

Made from lightweight refractory materials (such as floating beads and ceramic granules), these products have low bulk density and low thermal conductivity. They are mainly used in furnace insulation layers and flue insulation linings to improve energy efficiency and reduce heat loss.

(III) Classification by Functional Characteristics

 Wear-Resistant Precast Parts

Designed for high wear and erosion resistance, made from high-hardness materials such as silicon carbide and corundum. They are mainly used in severely worn components including iron troughs, launders, and grate bars.

 Erosion-Resistant Precast Parts

Designed for resistance to erosion from molten slag, molten iron, and acidic or alkaline media, using highly erosion-resistant raw materials such as magnesia and corundum. They are mainly applied in steel ladles, converters, glass melting furnaces, and similar equipment.

 Insulating Precast Parts

Primarily composed of lightweight insulating materials, these components focus on thermal insulation performance. They are used in furnace insulation layers and flue linings to reduce energy consumption.

 Composite Precast Parts

These combine multiple properties such as wear resistance + erosion resistance or thermal insulation + thermal shock resistance, making them suitable for complex working conditions. Typical examples include cement kiln inlet precast parts, which combine wear resistance, erosion resistance, and thermal shock resistance.

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