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Alumina Based Refractory Plastic
Product Information
What is Alumina Based Refractory Plastic?
Alumina-based refractory plastic is a type of unshaped refractory material, mainly made of alumina (Al2O3) as the primary raw material. They are suitable for high-temperature applications, such as steel, cement, glass, and petrochemicals, due to their superior high-temperature resistance, chemical resistance, and wear resistance.
Types of Alumina Based Refractory Plastic
Alumina-based refractory plastics can be classified into several types based on their alumina content, binder type, and specific additives used to tailor their properties to various applications. Some common types include:
Refractory plastics high-alumina are versatile and highly adaptable, which can be used in various industries that require high-temperature resistance and protection.
Composition
- High-alumina aggregates: These aggregates comprise alumina (Al2O3) particles. They are the principal component of the material, giving the majority of its high-temperature resistance, chemical resistance, and mechanical strength.
- Binders: Binders hold the aggregates together, providing the material with its plastic-like consistency and allowing it to be easily shaped and moulded. Standard binders include alumina-based hydraulic binders, such as calcium aluminate cement, and organic binders, such as phosphates or various polymers.
- Additives: Additives are incorporated into the refractory plastic to enhance specific properties, such as workability, adhesion, or resistance to particular environments. These may include dispersants, deflocculants, or other performance-enhancing agents.
Applications
| Industry | Application |
|---|---|
| Steel | Refractory ladle, Tundish, EAF, Blast furnace, Reheating furnace, Continuous casting equipment |
| Non-Ferrous Metal | Aluminum smelter, Copper converter furnace, Zinc leaching furnace, Lead smelting furnace, Nickel production furnace, Anode baking furnace, Electrolytic cell, Rotary kiln, Crucible furnace |
| Petrochemical | Ethylene cracking furnaces, Catalytic reforming units, Fluid catalytic cracking (FCC) units, Coking units, Hydrocracking units, Sulfur recovery units, Heaters and boilers |
| Ceramic and Refractory | Kiln and furnace linings, Sintering and calcining furnaces, Crucible and melting furnaces, Heat treatment furnaces, Frit and glaze melting furnaces, Glass tank furnaces |
| Glass | Glass tank furnaces, Regenerators and recuperators, Forehearths and distributors, Annealing lehrs, Glass melting electrodes, Throat and burner blocks |
| Cement and Lime | Rotary kilns, Preheaters and calciners, Coolers, Tertiary air ducts, Burner pipes and nozzles, Lime shaft kilns |
| Power Generation | Coal-fired power plants, Biomass-fired power plants, Waste-to-energy plants, Gas turbines, Heat recovery steam generators (HRSG), Incinerators |
| Incineration and Waste-to-Energy | Incinerator furnaces, Waste-to-energy plants, Boilers, Ash hoppers, Flue gas treatment systems, Secondary combustion chambers |
Advantages
- High-temperature resistance
- Chemical resistance
- Mechanical strength
- Thermal shock resistance
- Easy installation and repair
- Low thermal conductivity
Disadvantages
- Limited shelf life
- Higher cost
- Potential for shrinkage
- Lower strength compared to other refractory materials
Medium-alumina refractory plastics typically contain 50-85% alumina (Al2O3) content. Depending on the desired properties and application requirements, there are several aggregates, including tabular alumina, calcined bauxite, or fused alumina. The bonding agent is usually a high-temperature-resistant plastic clay, such as kaolin or ball clay. Some formulations also include additives like silicon carbide (SiC) to enhance specific properties, such as thermal conductivity or abrasion resistance.
Applications
- Non-Ferrous Metal Industry: Medium-alumina refractory plastics may be used for line aluminium electrolytic cells and copper smelting furnaces if cost is a concern and the application does not require the highest heat and chemical resistance.
- Ceramics and Glass Industry: Medium-alumina refractory plastics are cheaper and perform well enough for various ceramics and glass applications. They can line kilns and furnaces that don’t need high-alumina refractory plastics’ temperature and chemical resistance.
Advantages
- Balanced Performance: Medium-alumina refractory plastics combine high-alumina temperature, abrasion, and chemical resistance with low-alumina cost.
- Cost-efficiency: Medium-alumina refractory plastics are cheaper than high-alumina ones, making them suited for applications that need moderate heat and chemical resistance but are cost-sensitive.
- Versatility: They are instrumental in intermediate temperature zones where neither high-alumina nor low-alumina refractory plastics are ideal.
When selecting an alumina-based refractory plastic, looking into parameters such as operating temperature, chemical environment, wear resistance, and other application-specific requirements is critical. This helps to guarantee that the refractory plastic chosen provides the necessary efficiency and durability.
Properties
- High-temperature resistance
- Chemical resistance
- Abrasion resistance
- Thermal shock resistance
- Mechanical strength
- Ease of installation
- Adhesion and bonding
It’s critical to consider operating temperature, chemical environment, and wear resistance requirements when selecting an alumina-based refractory plastic for a specific application. Proper installation and curing procedures must also be followed to ensure optimal performance and durability of the material. Want to learn more about usage of alumina-based refractory plastic for different industries? let’s read on.
Applications
Steel Industry
Alumina-based refractory plastics play a crucial role in the steel industry due to their high-temperature resistance, durability, and chemical stability. These properties make them ideal for various components within steelmaking processes. Some critical applications within the steel industry include:
- Furnace linings
- Ladle refractories
- Tundish linings
- Reheat furnace linings
- Torpedo car linings
- Runner and trough refractories
Cement and Lime Industry
In the cement and lime industry, high-temperature resistance and chemical stability are crucial for the reliable performance of equipment. Alumina-based refractory plastics are an ideal choice for various components due to their excellent properties. Critical applications within the cement and lime industry include:
- Rotary kiln linings
- Preheater linings
- Clinker cooler linings
- Cyclone separator refractories
- Calcining furnace linings
- Vertical shaft kiln linings
Glass Industry
Alumina-based refractory plastics offer a range of beneficial properties that make them an ideal choice for various components within the glass industry. Their excellent thermal insulation, corrosion resistance, and durability are particularly advantageous in demanding environments. Critical applications within the glass industry include:
- Glass furnace linings
- Combustion chamber linings
- Regenerator linings
- Forehearth linings
- Glass forming refractories
- Annealing lehr linings
Non-Ferrous Metal Industry
Refractory plastics improve the efficiency, safety, and lifetime of high-temperature processing equipment in the nonferrous metal industry. Alumina-based refractory polymers, for example, are chemically, physically, and thermally resistant. Some common use include:
- Aluminum smelter linings
- Copper converter linings
- Zinc leach furnace linings
- Lead smelter refractories
- Nickel process refractories
- Precious metal refining refractories
Petrochemical Industry
Petrochemicals value alumina-based refractory plastics. They assure high-temperature processing equipment efficiency, safety, and endurance in diverse applications. Applications include:
- FCC unit refractories
- Process heater linings
- Reactor linings
- SRU refractories
- Incinerator linings
- Transfer line refractories
In Conclusion
These are just a few of our quick overviews of aluminum-based refractory plastics. Its use and function must be established and altered in response to increasingly precise usage scenarios. If you have any questions, please do not hesitate to contact us.
