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Article Navigation 1. Product Classification High alumina cement (HAC), also known as calcium aluminate cement (CAC), is categorized based on its Al₂O₃ content and chemical composition: Type Al₂O₃ Content Key Characteristics Standard HAC 35–45% Balanced strength and rapid hardening High-Purity HAC 50–65% Enhanced refractory properties (1,600°C+) Low-Calcium HAC 68–80% Superior chemical resistance, low porosity Specialized variants include zirconia-enhanced HAC for extreme thermal shock resistance and sulfate-resistant HAC for corrosive environments. 2. Technical Specifications Kerui’s high alumina cement complies with GB175-2007 and international standards, offering: Parameter Standard CA50 High-Purity CA70 Special CA80 Test Method Al₂O₃ Content 50% 70% 80% XRF Analysis Cold Crushing Strength ≥50 MPa ≥70 MPa ≥100 MPa ASTM C133 Refractoriness 1,100°C 1,200–1,300°C 1,300–1,600°C ASTM C113 Setting Time 2–4 hours 1–3 hours 1–3 hours ASTM C191 Thermal Conductivity 1.2–1.5 W/m·K 0.8–1.2 W/m·K 0.6–1.0 W/m·K ASTM C201 Kerui’s KR-CA80 Low-Calcium HAC achieves Al₂O₃ >80% with α-Al₂O₃ crystallization for ultra-high stability. 3. Industrial Applications 3.1 Construction 3.2 Metallurgy 3.3 Refractories 4. Usage Guidelines 4.1 Mixing Ratios 4.2 Curing Protocol 5. Transport & Storage 6. Procurement Best Practices 7. Why Choose Kerui High Alumina Cement? Kerui’s HAC is engineered for precision, backed by 24/7 technical support and a 15-year track record in…

Article Navigation 1. Fundamental Definitions Refractory Castable Refractory Cement 2. Composition and Manufacturing Component Refractory Castable Refractory Cement Aggregates 60–70% (calcined bauxite, corundum, etc.) None (pure binder) Binder 8–15% (calcium aluminate, phosphates) 100% (calcium aluminate/silicate) Additives Dispersants, anti-shrink agents, steel fibers None or minimal (set modifiers) Particle Size Multi-grade (0–10mm aggregates + fines) Ultrafine powder (<200 mesh) 3. Technical Performance Comparison Parameter Refractory Castable Refractory Cement Test Standard Max Service Temp 1,600–1,800°C 1,400–1,600°C ASTM C113 Cold Crushing Strength 30–100 MPa 20–50 MPa ASTM C133 Thermal Conductivity 0.8–2.5 W/m·K 1.2–3.0 W/m·K ASTM C201 Setting Time 2–8 hrs (hydraulic bonding) 0.5–4 hrs ASTM C191 Abrasion Resistance High (aggregate-reinforced) Low (binder-only matrix) ASTM C704 4. Application Scenarios 4.1 Refractory Castable 4.2 Refractory Cement 5. Installation Methods 5.1 Castables Installation 5.2 Cement Application 6. Selection Guidelines Choose Castables When: Choose Cement When: Critical Considerations: By understanding these distinctions, engineers can optimize material selection for durability and cost-efficiency in high-temperature environments. If you want to learn more about refractory castables and refractory cement, please feel free to consult us for free answers.

Article Navigation 1. What is Ceramic Fiber Insulation? Ceramic fiber insulation is a lightweight, high-temperature material composed of alumina-silicate fibers. Renowned for its exceptional thermal stability (up to 1600°C) and low thermal conductivity, it serves as a critical solution for energy conservation and equipment protection in extreme environments. This guide explores its diverse forms, industry-specific uses, and cutting-edge advancements. 2. Types of Ceramic Fiber Insulation Products Ceramic fiber insulation is available in multiple forms, each tailored to specific thermal and mechanical demands: Product Type Composition Max Temp (°C) Density (kg/m³) Key Features Ceramic Fiber Blankets Al₂O₃ (45–55%) + SiO₂ 1260–1430 64–128 Flexible, easy to cut and layer Ceramic Fiber Modules Pre-folded blanket units 1430 96–160 Rapid installation, minimal joints Ceramic Fiber Boards Fiber + organic binders 1100–1260 240–320 Rigid, high compressive strength Ceramic Fiber Paper Ultra-thin fibers 1000 180–220 Electrical insulation, gasketing Ceramic Fiber Textiles Fiber + glass filament 1000–1100 300–500 Heat-resistant curtains, seals More Ceramic Fiber Insulation Products: Click Here! Specialized Variants: 3. Technical Properties and Performance Metrics Property Typical Value Test Method Impact on Performance Thermal Conductivity 0.05–0.15 W/m·K (at 600°C) ASTM C201 Lower values = better insulation Linear Shrinkage <2.5% (24h at max temp) ASTM C356 Indicates…

Article Navigation 1. Introduction to Ceramic Blanket Ceramic fiber blanket (CFB) is lightweight, high-temperature insulation materials made from alumina-silicate fibers. With thermal stability up to 1430°C and low thermal conductivity, they are widely used in furnaces, boilers, and aerospace systems. This guide covers CFB types, performance metrics, and industrial applications, providing actionable insights for engineers and procurement professionals. 2. Classification by Temperature and Composition Ceramic Blanket Insulation are categorized based on maximum service temperature and chemical composition: Type Temperature Range (°C) Al₂O₃ Content (%) Key Features Standard Grade 950–1100 45–47 Cost-effective, general-purpose insulation High-Purity 1100–1260 47–49 Improved thermal shock resistance Zirconia-Enhanced 1260–1430 52–55 + ZrO₂ Superior high-temperature stability Alkali-Resistant 800–1000 40–42 + CaO/MgO Resists corrosion in cement/glass kilns 3. Key Technical Properties 3.1 Physical and Thermal Performance Parameter Test Standard Typical Range Importance Density ASTM C167 64–128 kg/m³ Affects insulation and load capacity Thermal Conductivity ASTM C201 0.05–0.12 W/m·K (at 500°C) Determines energy efficiency Tensile Strength ASTM C1335 50–150 kPa Critical for mechanical durability Linear Shrinkage ASTM C356 <3% (24 hrs at max temp) Indicates long-term stability 3.2 Chemical Resistance 4. Applications Across Industries 4.1 Metallurgy 4.2 Power Generation 4.3 Petrochemical 4.4 Aerospace 5. Installation and Handling Best Practices 5.1…

Article Navigation 1. Introduction to Kiln Lining Materials Refractory materials are the backbone of kiln durability and energy efficiency. The debate between refractory castables (monolithic linings) and Refractory bricks (pre-shaped units) hinges on factors like thermal stress, chemical exposure, and project complexity. This guide compares their properties, costs, and ideal applications, empowering engineers to make informed decisions for kiln construction or relining. 2. Key Differences: Castables vs. Refractory bricks 2.1 Material Composition and Forms Parameter Refractory Castables Firebricks Form Unshaped mixtures (powder + aggregates + binder) Pre-fired, shaped bricks Installation Poured, vibrated, or gunned Laid with mortar, staggered joints Curing Requires 24–72 hours of drying and heat treatment Ready-to-use after mortar sets (12–24 hrs) 2.2 Advantages and Limitations Aspect Castables Firebricks Complex Shapes Seamless lining for curved/warped surfaces Limited to standard shapes; cuts required Thermal Shock Moderate resistance (depends on binder) High resistance (pre-fired structure) Repairability Easy patching of damaged areas Requires brick replacement Labor Cost Higher (skilled labor for mixing/pouring) Lower (simpler bricklaying) 3. Technical Performance Comparison 3.1 Critical Properties Parameter Refractory Castables Firebricks Test Standard Max Service Temp 1600–1800°C (alumina-based) 1400–1750°C (high alumina) ASTM C113 Cold Crushing Strength 30–100 MPa 20–60 MPa ASTM C133 Thermal Conductivity 1.0–2.5 W/m·K…

Article Navigation 1. Introduction to Silicon Carbide Kiln Furniture Silicon carbide (SiC) kiln furniture is a critical component in high-temperature industrial processes, offering unmatched thermal stability, mechanical strength, and corrosion resistance. Widely used in ceramics, metallurgy, and renewable energy sectors, SiC kiln furniture includes saggers, batt plates, burner nozzles, beams, and rollers. This guide explores their types, technical specifications, and applications, leveraging insights from industry standards and advanced manufacturing practices. 2. Classification by Bonding Methods SiC kiln furniture is categorized based on bonding techniques, which directly influence performance and cost. Bonding Type Key Features Max Service Temp (°C) Common Products Clay-Bonded Low-cost, simple production; limited strength at high temps 1400–1500 Saggars, batt plates Oxide-Bonded Al₂O₃/SiO₂ binder; improved thermal shock resistance 1600 Kiln beams, columns Nitride-Bonded Si₃N₄ bonds; high mechanical strength, ideal for cyclic heating 1600–1800 Burner nozzles, rollers Recrystallized (RBSiC) Pure SiC; ultra-high density, 10–20x stronger than clay-bonded 2200–2500 High-performance saggers, tubes 3. Key Product Types and Specifications 3.1 Silicon Carbide Saggars (RBSiC/SiSiC) 3.2 Silicon Carbide Batt Plates 3.3 Silicon Carbide Burner Nozzles 3.4 Structural Components (Beams, Columns, Rollers) 4. Technical Performance Indicators Parameter Test Standard RBSiC Range SiSiC Range Porosity ASTM C20 15–20% 10–15% Cold Crushing Strength ASTM C133…

Article Navigation – Selection of Refractory Materials for Boilers 1. Introduction to Boiler Refractory Materials Boilers operate under extreme thermal, mechanical, and chemical stresses, making the selection of refractory materials critical for efficiency, safety, and longevity. Refractories in boilers serve as thermal insulators, protect structural components, and resist corrosion from ash, slag, and flue gases. This guide explores the types of boiler refractories, technical specifications, and best practices for selection and maintenance. 2. Types of Refractory Materials for Boilers Boiler refractory are classified by composition, application method, and temperature resistance. Below is a detailed comparison: 2.1 Fire Clay Bricks Property Details Applications Al₂O₃ Content 25–40% Combustion chambers, lower-temperature zones Max Service Temp 1200–1400°C Industrial steam boilers Advantages Cost-effective, easy installation Limitations Low slag resistance 2.2 High Alumina Bricks Property Details Applications Al₂O₃ Content 50–90% High-heat zones (e.g., furnace arches) Max Service Temp 1400–1800°C Power plant boilers, CFB boilers Advantages Excellent thermal shock resistance Limitations Higher cost 2.3 Insulating Castables Property Details Applications Composition Lightweight aggregates (e.g., vermiculite) Boiler walls, doors Thermal Conductivity 0.5–1.2 W/m·K Energy-efficient linings Advantages Rapid installation, low heat storage Limitations Lower mechanical strength 2.4 Silicon Carbide Refractories Property Details Applications Max Service Temp Up to 1600°C Ash…

High alumina bricks are indispensable refractory materials widely used in industries such as steelmaking, cement production, and glass manufacturing. Understanding the types of high alumina bricks, their technical specifications, dimensions, and packaging standards is critical for selecting the right product for your application. This article dives deep into these aspects while adhering to Google SEO best practices, ensuring you gain actionable insights backed by industry expertise. 1. Types of High Alumina Bricks: Classification and Applications High alumina bricks are categorized based on their alumina (Al₂O₃) content, application-specific properties, and manufacturing processes. Below is a detailed breakdown: 1.1 Classification by Alumina Content Type Al₂O₃ Content (%) Key Characteristics Common Applications Standard High Alumina 48–60 Moderate thermal stability, cost-effective Blast furnaces, kiln linings Premium High Alumina 60–75 Enhanced slag resistance, high compressive strength Steel ladles, cement rotary kilns Super High Alumina 75–90 Exceptional refractoriness (>1770°C), low porosity Glass tanks, incinerators Corundum Bricks >90 Ultra-high purity, extreme thermal shock resistance High-temperature reactors, petrochemical furnaces 1.2 Specialized High Alumina Bricks 2. Key Technical Indicators of High Alumina Bricks High alumina bricks must meet stringent performance criteria. Below are the critical parameters: 2.1 Physical and Chemical Properties Parameter Standard Range Testing Method (ASTM/ISO) Importance Al₂O₃…

When it comes to high-temperature industrial environments, choosing high-quality refractory materials is critical. Kerui has always been committed to providing excellent refractory products to meet the needs of its customers. So Ulanqab Customer chooses first-level high alumina bricks, second-level high alumina bricks, and corundum castable phosphate Fire clay from Kerui Refractory for their silicomanganese Furnace. Kerui is not only committed to providing high-quality refractory products but also focuses on close cooperation with customers. The company works with customers to understand their specific needs and application environments to provide customized solutions. This collaborative approach ensures accurate selection and successful application of products, helping customers improve production efficiency, extend equipment life, and reduce maintenance costs. As a company with extensive experience in the refractory industry, Kerui Refractory continuously pursues innovation and technological advancement. They have advanced production equipment and laboratory facilities to ensure product consistency and reliability through strict quality control and testing procedures. In addition, Kerui Refractory is also actively developing new refractory materials to meet changing market demands and environmental requirements. In short, Kerui Company has won the trust and praise of customers in Ulanqab and other regions by providing high-quality refractory products and excellent customer service. They have not only…

In the morning of July 12, many employees were orderly debugging the equipment under the leadership of the commercial director Yan. Today is the day that Russian customers open remote video inspection work. In May 2022, KRNC received the first order from the Russian customer. Now the first batch of goods has been produced and successfully delivered. The customer is very satisfied after receiving the goods. At the same time, the customer also expressed his willingness to strengthen in-depth cooperation. The customer then sent a second purchase order for refractory materials. This video factory inspection is the customer’s intention to deepen the in-depth understanding of KRNC . Usually, before the production of refractory bricks, customers will visit the factory to test the strength of the factory. However, due to the epidemic, the Russian customer could not come to the site to inspect the factory in person. KRNC staff actively communicated with the customer and decided to start the video factory inspection. KRNC leaders gave great importance to this factory inspection. On the morning of July 12, employees arrived at the plant early to conduct a video interview with the customer and officially begin the inspection work. According to the customer’s request,…

Magnesia-alumina spinel sand. Magnesium-aluminum spinel chemical formula MgAl2O4 or MgO-Al2O3, theoretical content ω(MgO) = 28.3%, ω(Al2O3) = 71.7%. Natural magnesia-alumina spinel is rarely found, and all of the industrial applications are synthetic products. Magnesia alumina spinel has good resistance to erosion, abrasion and good thermal shock stability. According to the synthesis method is divided into sintering method and electrofusion method.The melting point of MgAl spinel solid solution is 2135℃. Due to the reaction of MgO and Al2O3 to form spinel, there is about 5% to 8% volume expansion, which poses some difficulties to the densification of Mg-Al spinel synthesis process. The synthesis of Mg-Al spinel belongs to the solid phase reaction, which can be seen as the oxygen ions of larger radius do compact accumulation, while the smaller radius Mg and Al ions diffuse each other in the framework of fixed oxygen ion compact accumulation.(1) Sintered magnesia-alumina spinel sand.Sintered synthetic spinel is usually high purity lightly burned MgO (impurity mass fraction less than 3%) and industrial alumina or alumina mixed grinding, balling, into high temperature rotary kiln or inverted flame kiln calcination. Mostly used in the preparation of cement kiln with magnesite a spinel brick. The following table shows the…

1. Hot blast furnace lining structure distribution. (1) Vault using vertical hanging chain line structure. Vault and hot blast furnace wall lining is not connected, the whole is supported by the inner wall of the furnace shell support metal bracket layered bracket. Sliding joints are provided between the vault lining and the furnace wall lining to prevent the destruction of refractory caused by friction between the furnace wall lining and the vault lining due to relative displacement. High temperature internal burning type vault lining refractory brick using plate structure, can abate the thermal expansion of the vault masonry, eliminate the thermal stress damage caused by the temperature difference between the upper and lower. (2) “Eye” shaped combustion chamber liner structure. Combustion chamber in the hot air furnace and large wall separation. Set sliding joints using sliding structure, the masonry around the combustion chamber is divided into multiple sections, each section of the masonry can be free to expand. (3) Self-supporting combustion chamber diaphragm wall structure. The partition wall adopts the combined self-supporting structure. Sealed high-temperature resistant steel plate is set inside to strengthen its sealing. With heat insulation, sealing, sliding and other purposes. Refractory materials for each temperature zone of…