Products
High-Alumina Refractory Brick Product Types and Grading Standards Based on Al₂O₃ Content (GB/T 2988–2025) Ultra‑High‑Alumina Bricks (LZ‑80): Al₂O₃ ≥ 80%, Apparent Porosity ≤ 18% First‑Grade High‑Alumina Bricks (LZ‑75): 75% ≤ Al₂O₃ < 80%, Softening Temperature under Load ≥ 1700℃ Second‑Grade High‑Alumina Bricks (LZ‑65): 65% ≤ Al₂O₃ < 75%, Compressive Strength ≥ 60 MPa Third‑Grade High‑Alumina Bricks (LZ‑55): 55% ≤ Al₂O₃ < 65%, Bulk Density 2.3–2.5 g/cm³ Functional Products: Nanomodified High‑Alumina Bricks: Incorporating 5–8% nano‑Al₂O₃, enhancing thermal shock resistance by 50%. Low‑Carbon High‑Alumina Bricks: Reducing firing temperatures to 1400℃, cutting CO₂ emissions by 12%. Micro‑Expansion High‑Alumina Bricks: Exhibiting a high‑temperature linear expansion of +0.3%, effectively compensating for shrinkage. Modern Production Processes: Intelligent Raw Material System – AI‑Driven Alumina Sorting (Al₂O₃ Fluctuation ≤ 0.5%); Composite Binders (Silica Fume + α‑Al₂O₃ Nanopowder); Digital Press Molding – Hydraulic Press Pressure: 160–200 MPa; Online 3D Scanning for Dimensional Inspection (Accuracy ±0.3 mm); Green Firing Technologies – Hydrogen‑Fueled Tunnel Kilns (Temperature Range: 1500–1600℃); Waste Heat Recovery Systems (Energy Consumption Reduced by 25%). Applications & Application Areas – Usage Locations & Performance Benefits: New Energy Lithium‑Ion Battery Sintering Kilns: Service Life Extended to 3 Years. Electronic Glass Borosilicate Melting Furnaces: Energy Consumption Reduced by 18%. Hydrogen Energy Equipment Electrolyzer Insulation Layers: Thermal Losses Decreased by 35%. Environmental Hazardous Waste Incinerators: Corrosion Resistance Enhanced by 40%. Core Performance Advantages Compared to Traditional Materials: Refractoriness: 1790℃ (compared to only 1650℃ for clay bricks). Slag Resistance: SiO₂ Erosion Rate Reduced by 60%. Thermal Conductivity: 1.8 W/(m·K) (Superior to Silica Bricks). Economic Analysis: Initial Cost: 50–60% Lower Than Zirconia‑Corundum Bricks. Maintenance Frequency: 3 Years Without Major Overhaul (vs. 2 Years for Conventional Bricks). Basic Physical and Chemical Indicators: - Bulk Density: 2.5–3.2 g/cm³ (Depending on Grade). - Thermal Shock Stability: ≥ 15 Cycles (Water Quench at 1100℃). High‑Temperature Performance: - Softening Temperature under Load: 1420–1750℃. - Reheating Linear Change: ≤ 0.5% (1600℃ × 3 hours). Special Requirements: - Alkali Resistance: K₂O Erosion ≤ 1.0 mm/100 hours. - Thermal Shock Resistance: Nano‑Type ≥ 30 Cycles.
First-grade high-alumina brick
High-Alumina Refractory Brick Product Types and Grading Standards Based on Al₂O₃ Content (GB/T 2988–2025) Ultra‑High‑Alumina Bricks (LZ‑80): Al₂O₃ ≥ 80%, Apparent Porosity ≤ 18% First‑Grade High‑Alumina Bricks (LZ‑75): 75% ≤ Al₂O₃ < 80%, Softening Temperature under Load ≥ 1700℃ Second‑Grade High‑Alumina Bricks (LZ‑65): 65% ≤ Al₂O₃ < 75%, Compressive Strength ≥ 60 MPa Third‑Grade High‑Alumina Bricks (LZ‑55): 55% ≤ Al₂O₃ < 65%, Bulk Density 2.3–2.5 g/cm³ Functional Products: Nano‑Modified High‑Alumina Bricks: Incorporating 5–8% nano‑Al₂O₃, enhancing thermal shock resistance by 50%. Low‑Carbon High‑Alumina Bricks: Reducing firing temperatures to 1400℃, cutting CO₂ emissions by 12%. Micro‑Expansion High‑Alumina Bricks: Exhibiting a high‑temperature linear expansion of +0.3%, effectively compensating for shrinkage. Modern Production Processes: Intelligent Raw Material System: AI‑driven sorting of alumina bauxite with Al₂O₃ content variation ≤ 0.5%. Composite Binders: A blend of silica fume and α‑Al₂O₃ nanopowder. Digital Press Molding: Hydraulic press with a pressure range of 160–200 MPa; online 3D scanning for dimensional inspection with an accuracy of ±0.3 mm. Green Firing Technology: Hydrogen‑powered tunnel kilns operating at temperatures between 1500–1600℃, coupled with waste heat recovery systems that reduce energy consumption by 25%. Applications & Application Areas: Application Locations & Performance Benefits: New Energy Lithium‑Ion Battery Sintering Kilns: Service life extended to 3 years. Electronic Glass Borosilicate Melting Furnaces: Energy consumption reduced by 18%. Hydrogen Energy Equipment Electrolyzer Insulation Layers: Heat loss minimized by 35%. Environmental Hazardous Waste Incinerators: Corrosion resistance improved by 40%. Core Performance Advantages Compared to Traditional Materials: Refractoriness: 1790℃ (compared to only 1650℃ for clay bricks). Slag Resistance: Reduced SiO₂ erosion rate by 60%. Thermal Conductivity: 1.8 W/(m·K) (superior to silicon bricks). Economic Analysis: Initial Cost: 50–60% lower than zirconia‑corundum bricks. Maintenance Frequency: 3 years without major overhauls (compared to the traditional 2 years). Basic Physicochemical Indicators: – Bulk Density: 2.5–3.2 g/cm³ (depending on grade). – Thermal Shock Stability: ≥ 15 cycles (water quench at 1100℃). High‑Temperature Performance: – Softening Temperature under Load: 1420–1750℃. – Linear Change After Reheating: ≤ 0.5% (1600℃ × 3 hours). Special Requirements: – Alkali Resistance: K₂O erosion ≤ 1.0 mm/100 h. – Thermal Shock Resistance: Nano‑type products ≥ 30 cycles.
First‑grade high‑alumina brick G4
High-Alumina Refractory Brick Product Types and Grading Standards Based on Al₂O₃ Content (GB/T 2988–2025) Ultra‑High‑Alumina Bricks (LZ‑80): Al₂O₃ ≥ 80%, Apparent Porosity ≤ 18% First‑Grade High‑Alumina Bricks (LZ‑75): 75% ≤ Al₂O₃ < 80%, Softening Temperature under Load ≥ 1700℃ Second‑Grade High‑Alumina Bricks (LZ‑65): 65% ≤ Al₂O₃ < 75%, Compressive Strength ≥ 60 MPa Third‑Grade High‑Alumina Bricks (LZ‑55): 55% ≤ Al₂O₃ < 65%, Bulk Density 2.3–2.5 g/cm³ Functional Products: Nanomodified High‑Alumina Bricks: Incorporating 5–8% nano‑Al₂O₃, enhancing thermal shock resistance by 50%. Low‑Carbon High‑Alumina Bricks: Reducing firing temperatures to 1400℃, cutting CO₂ emissions by 12%. Micro‑Expansion High‑Alumina Bricks: Exhibiting a high‑temperature linear expansion of +0.3%, effectively compensating for shrinkage. Modern Production Processes: Intelligent Raw Material System – AI‑Driven Alumina Sorting (Al₂O₃ Fluctuation ≤ 0.5%). Composite Binders (Silica Fume + α‑Al₂O₃ Nanopowder). Digital Press Molding with Hydraulic Presses at 160–200 MPa. Online 3D Scanning for Dimensional Inspection (Accuracy ±0.3 mm). Green Firing Technologies: Hydrogen‑Fueled Tunnel Kilns (Temperature 1500–1600℃), Combined with Waste Heat Recovery Systems (Energy Consumption Reduced by 25%). Applications & Application Areas: – Use Locations: – Performance Benefits: New Energy Lithium‑Ion Battery Sintering Kilns: Service Life Extended to 3 Years. – Electronic Glass Borosilicate Melting Furnaces: Energy Consumption Reduced by 18%. – Hydrogen Energy Equipment Electrolyzer Insulation Layers: Heat Loss Reduced by 35%. – Environmental Hazardous Waste Incinerators: Corrosion Resistance Enhanced by 40%. Core Performance Advantages Compared to Traditional Materials: – Refractoriness: 1790℃ (compared to only 1650℃ for clay bricks). – Slag Resistance: SiO₂ Erosion Rate Reduced by 60%. – Thermal Conductivity: 1.8 W/(m·K) (Superior to Silica Bricks). Economic Analysis: – Initial Cost: 50–60% Lower Than Zirconia‑Corundum Bricks. – Maintenance Frequency: 3 Years Without Major Overhaul (vs. 2 Years for Conventional Bricks). Physical and Chemical Indicators: – Basic Indicators: – Bulk Density: 2.5–3.2 g/cm³ (depending on grade). – Thermal Shock Stability: ≥ 15 Cycles (Water Quench at 1100℃). – High‑Temperature Performance: – Softening Temperature under Load: 1420–1750℃. – Reheating Linear Change: ≤ 0.5% (1600℃ × 3 hours). – Special Requirements: – Alkali Resistance: K₂O Erosion ≤ 1.0 mm/100 hours. – Thermal Shock Resistance: Nano‑Type ≥ 30 Cycles.
Extra-grade high-alumina brick
High-Alumina Refractory Brick Product Types and Grading Standards Based on Al₂O₃ Content (GB/T 2988–2025) — Special‑Grade High‑Alumina Brick (LZ‑80): Al₂O₃ ≥ 80%, Apparent Porosity ≤ 18% — First‑Grade High‑Alumina Brick (LZ‑75): 75% ≤ Al₂O₃ < 80%, Softening Temperature under Load ≥ 1700℃ — Second‑Grade High‑Alumina Brick (LZ‑65): 65% ≤ Al₂O₃ < 75%, Compressive Strength ≥ 60 MPa — Third‑Grade High‑Alumina Brick (LZ‑55): 55% ≤ Al₂O₃ < 65%, Bulk Density 2.3–2.5 g/cm³ Functional Products: — Nano‑Modified High‑Alumina Bricks: Incorporating 5–8% nano‑Al₂O₃, enhancing thermal shock resistance by 50%. — Low‑Carbon High‑Alumina Bricks: Reducing firing temperatures to 1400℃, cutting CO₂ emissions by 12%. — Micro‑Expansion High‑Alumina Bricks: Exhibiting a high‑temperature linear expansion of +0.3%, effectively compensating for shrinkage. Modern Production Processes: — Intelligent Raw Material System: AI‑driven sorting of high‑alumina bauxite with Al₂O₃ content fluctuations kept within ±0.5%. — Composite Binders: A blend of silica fume and α‑Al₂O₃ nanopowder. — Digital Press Molding: Hydraulic press with pressures ranging from 160–200 MPa; in‑line 3D scanning for dimensional inspection, achieving an accuracy of ±0.3 mm. — Green Firing Technologies: Hydrogen‑powered tunnel kilns operating at temperatures between 1500–1600℃, coupled with waste heat recovery systems that reduce energy consumption by 25%. Applications & Application Areas: — Use Cases & Performance Benefits: — New Energy Lithium‑Ion Battery Sintering Kilns: Extending service life to 3 years. — Electronic Glass Borosilicate Melting Furnaces: Reducing energy consumption by 18%. — Hydrogen Energy Equipment Electrolyzer Insulation Layers: Cutting heat loss by 35%. — Environmental Hazardous Waste Incinerators: Improving corrosion resistance by 40%. Core Performance Advantages Compared to Traditional Materials: — Refractoriness: 1790℃ (compared to just 1650℃ for clay bricks). — Slag Resistance: Reducing SiO₂ erosion rates by 60%. — Thermal Conductivity: 1.8 W/(m·K) (superior to silicon bricks). Economic Analysis: — Initial Costs: 50–60% lower than zirconia‑corundum bricks. — Maintenance Frequency: 3‑year intervals without major overhauls (compared to the traditional 2‑year cycle). Fundamental Physical and Chemical Indicators: — Bulk Density: 2.5–3.2 g/cm³ (depending on grade). — Thermal Shock Stability: ≥ 15 cycles (water quench at 1100℃). — High‑Temperature Performance: — Softening Temperature under Load: 1420–1750℃. — Linear Change After Reheating: ≤ 0.5% (after 1600℃ for 3 hours). — Special Requirements: — Alkali Resistance: K₂O erosion ≤ 1.0 mm/100 h. — Thermal Shock Resistance: Nano‑type products achieve ≥ 30 cycles.
Third-grade high-alumina shaped brick
Product Types and Grading Standards for High-Alumina Refractory Bricks Based on Al₂O₃ Content (GB/T 2988–2025) Special-grade High-Alumina Brick (LZ-80): Al₂O₃ ≥ 80%; Apparent Porosity ≤ 18% First-grade High-Alumina Brick (LZ-75): 75% ≤ Al₂O₃ < 80%; Softening Temperature under Load ≥ 1700℃ Second-grade High-Alumina Brick (LZ-65): 65% ≤ Al₂O₃ < 75%; Compressive Strength ≥ 60 MPa Third-grade High-Alumina Brick (LZ-55): 55% ≤ Al₂O₃ < 65%; Bulk Density 2.3–2.5 g/cm³ Functional Products: Nano-modified High-Alumina Brick: Contains 5–8% nano-Al₂O₃, improving thermal shock resistance by 50%. Low-carbon High-Alumina Brick: Sintering temperature reduced to 1400℃, with CO₂ emissions cut by 12%. Micro-expanding High-Alumina Brick: High-temperature linear expansion of +0.3%, compensating for shrinkage. Modern Production Processes: Intelligent Raw-material System: AI-based sorting of high-alumina bauxite (Al₂O₃ variation ≤ 0.5%). Composite Binders: Silica micro-powder plus α-Al₂O₃ nano-powder. Digital Press Molding: Hydraulic press with pressure of 160–200 MPa; online 3D scanning for dimensional inspection (accuracy ±0.3 mm). Green Sintering Technologies: Hydrogen-fueled tunnel kiln (operating at 1500–1600℃); waste-heat power-generation system (reducing energy consumption by 25%). Applications: Application Areas and Usage Locations: Benefits Achieved: New-energy lithium-battery sintering kilns: Service life extended to 3 years. Electronic glass—high-borosilicate melting furnaces: Energy consumption reduced by 18%. Hydrogen-energy equipment—electrolyzer insulation layers: Heat loss decreased by 35%. Environmental protection—hazardous-waste incinerators: Corrosion resistance improved by 40%. Core Performance Advantages Compared with Traditional Materials: Refractoriness: 1790℃ (clay bricks only 1650℃). Slag resistance: SiO₂ erosion rate reduced by 60%. Thermal conductivity: 1.8 W/(m·K) (superior to silica bricks). Economic Analysis: Initial Cost: 50–60% lower than zirconia–corundum bricks. Maintenance Frequency: No major overhauls required for 3 years (compared with 2 years for conventional products). Physicochemical Indicators: Basic Indicators: – Bulk density: 2.5–3.2 g/cm³ (according to grade). – Thermal-shock stability: ≥15 cycles (water quenching at 1100℃). High-Temperature Performance: – Creep softening onset: 1420–1750℃. – Linear change after re-sintering: ≤0.5% (at 1600℃ for 3 hours). Special Requirements: – Alkali resistance: K₂O erosion ≤ 1.0 mm/100 h. – Thermal-shock resistance: Nano-type ≥30 cycles.
Third‑grade high‑alumina shaped bricks
Product Types and Grading Standards for High-Alumina Refractory Bricks Based on Al₂O₃ Content (GB/T 2988–2025) Special-Grade High-Alumina Brick (LZ-80): Al₂O₃ ≥ 80%; Apparent Porosity ≤ 18% First-Grade High-Alumina Brick (LZ-75): 75% ≤ Al₂O₃ < 80%; Softening Temperature under Load ≥ 1700℃ Second-Grade High-Alumina Brick (LZ-65): 65% ≤ Al₂O₃ < 75%; Compressive Strength ≥ 60 MPa Third-Grade High-Alumina Brick (LZ-55): 55% ≤ Al₂O₃ < 65%; Bulk Density 2.3–2.5 g/cm³ Functional Products: Nano-Modified High-Alumina Bricks—5–8% nano-Al₂O₃ added, improving thermal shock resistance by 50%; Low-Carbon High-Alumina Bricks—firing temperature reduced to 1400℃, with CO₂ emissions cut by 12%; Micro-Expanding High-Alumina Bricks—high-temperature linear expansion +0.3%, compensating for shrinkage. Modern Production Processes: Intelligent Raw-Material System—AI-based sorting of high-alumina bauxite (Al₂O₃ variation ≤ 0.5%); Composite Binders (silica micro-powder + α-Al₂O₃ nano-powder); Digital Press Molding—hydraulic press pressure: 160–200 MPa; On-line 3D scanning for dimensional inspection (accuracy ±0.3 mm). Green Firing Technologies: Hydrogen-Fueled Tunnel Kiln (operating at 1500–1600℃); Waste Heat Recovery Power Generation System (reducing energy consumption by 25%). Applications: Application Areas, Service Locations, and Performance Benefits New Energy: Lithium-Battery Sintering Kilns—service life extended to 3 years; Electronic Glass: High-Borosilicate Melting Furnaces—energy consumption reduced by 18%; Hydrogen-Energy Equipment: Electrolyzer Insulation Layers—thermal losses decreased by 35%; Environmental Protection: Hazardous-Waste Incinerators—corrosion resistance improved by 40%. Core Performance Advantages Compared with Traditional Materials: Refractoriness: 1790℃ (clay bricks only 1650℃); Slag Resistance: SiO₂ erosion rate reduced by 60%; Thermal Conductivity: 1.8 W/(m·K) (superior to silica bricks). Economic Analysis: Initial Cost—50–60% lower than zirconia-corundum bricks; Maintenance Frequency—no major overhauls required for 3 years (compared with 2 years for conventional products). Physicochemical Indicators: Basic Parameters—Bulk Density: 2.5–3.2 g/cm³ (according to grade); Thermal Shock Stability: ≥15 cycles (water quenching at 1100℃); High-Temperature Performance—Softening Under Load: 1420–1750℃; Linear Change after Reheating: ≤0.5% (at 1600℃ for 3 hours); Special Requirements—Alkali Resistance: K₂O erosion ≤ 1.0 mm/100 h; Thermal Shock Resistance: Nano-type ≥30 cycles.
High-Alumina Fan-Shaped Brick, Grade 3
Types and Grading Standards for High-Alumina Refractory Bricks Based on Al₂O₃ Content (GB/T 2988–2025) Special-grade high-alumina brick (LZ-80): Al₂O₃ ≥ 80%; apparent porosity ≤ 18%. First-grade high-alumina brick (LZ-75): 75% ≤ Al₂O₃ < 80%; softening temperature under load ≥ 1700℃. Second-grade high-alumina brick (LZ-65): 65% ≤ Al₂O₃ < 75%; compressive strength ≥ 60 MPa. Third-grade high-alumina brick (LZ-55): 55% ≤ Al₂O₃ < 65%; bulk density 2.3–2.5 g/cm³. Functional products: Nano-modified high-alumina brick: 5–8% nano-Al₂O₃ added, improving thermal shock resistance by 50%. Low-carbon high-alumina brick: firing temperature reduced to 1400℃, with CO₂ emissions cut by 12%. Micro-expanding high-alumina brick: high-temperature linear expansion +0.3%, compensating for shrinkage. Modern production processes: Intelligent raw-material system: AI-based sorting of high-alumina bauxite (Al₂O₃ variation ≤ 0.5%). Composite binder: silica micro-powder plus α-Al₂O₃ nano-powder. Digital pressing and forming: hydraulic press pressure 160–200 MPa; online 3D scanning for dimensional inspection (accuracy ±0.3 mm). Green firing technologies: hydrogen-fueled tunnel kiln (temperature 1500–1600℃); waste-heat power-generation system (energy consumption reduced by 25%). Applications: Application areas, service locations, and performance benefits: New-energy lithium-battery sintering kilns: service life extended to 3 years. Electronic glass—high-borosilicate melting furnaces: energy consumption reduced by 18%. Hydrogen-energy equipment—electrolyzer insulation layers: heat loss reduced by 35%. Environmental protection—hazardous-waste incinerators: corrosion resistance improved by 40%. Core performance advantages compared with traditional materials: Refractoriness: 1790℃ (clay bricks only 1650℃). Slag resistance: SiO₂ erosion rate reduced by 60%. Thermal conductivity: 1.8 W/(m·K) (better than silica bricks). Economic analysis: Initial cost: 50–60% lower than zirconia–corundum bricks. Maintenance frequency: 3-year maintenance-free operation (vs. 2 years for conventional bricks). Physicochemical indicators: Basic indicators: – Bulk density: 2.5–3.2 g/cm³ (according to grade); – Thermal-shock stability: ≥15 cycles (water quench at 1100℃). High-temperature performance: – Load-softening onset: 1420–1750℃; – Linear change after re-firing: ≤0.5% (at 1600℃ for 3 hours). Special requirements: – Alkali resistance: K₂O erosion ≤ 1.0 mm/100 h; – Thermal shock resistance: nano-type ≥30 cycles.
Third-grade high-alumina grate brick
Types and Grading Standards for High-Alumina Refractory Bricks Based on Al₂O₃ Content (GB/T 2988–2025) Special-Grade High-Alumina Brick (LZ-80): Al₂O₃ ≥ 80%; Apparent Porosity ≤ 18% First-Grade High-Alumina Brick (LZ-75): 75% ≤ Al₂O₃ < 80%; Softening Temperature under Load ≥ 1700℃ Second-Grade High-Alumina Brick (LZ-65): 65% ≤ Al₂O₃ < 75%; Compressive Strength ≥ 60 MPa Third-Grade High-Alumina Brick (LZ-55): 55% ≤ Al₂O₃ < 65%; Bulk Density 2.3–2.5 g/cm³ Functional Products: Nano-Modified High-Alumina Brick: Contains 5–8% nano-Al₂O₃, improving thermal shock resistance by 50%. Low-Carbon High-Alumina Brick: Sintering temperature reduced to 1400℃, with CO₂ emissions cut by 12%. Micro-Expanding High-Alumina Brick: High-Temperature Linear Expansion +0.3%, compensating for shrinkage. Modern Production Processes: Intelligent Raw-Material System: AI-Based Sorting of High-Alumina Bauxite (Al₂O₃ Variation ≤ 0.5%). Composite Binders: Silica Micropowder + α-Al₂O₃ Nanopowder. Digital Press Molding: Hydraulic Press Pressure: 160–200 MPa; On-Line 3D Scanning for Dimensional Inspection (Accuracy ±0.3 mm). Green Sintering Technologies: Hydrogen-Fueled Tunnel Kiln (Temperature 1500–1600℃); Waste Heat Recovery Power Generation System (Energy Consumption Reduced by 25%). Applications: Application Fields and Usage Locations: Benefits Achieved: New Energy Lithium-Battery Sintering Kilns: Service Life Extended to 3 Years. Electronic Glass High-Borosilicate Melting Furnaces: Energy Consumption Reduced by 18%. Hydrogen-Energy Equipment Electrolyzers: Insulation Layers Reduce Heat Loss by 35%. Environmental Protection Hazardous-Waste Incinerators: Corrosion Resistance Improved by 40%. Core Performance Advantages Compared with Traditional Materials: Refractoriness: 1790℃ (Clay Bricks Only 1650℃). Slag Resistance: SiO₂ Erosion Rate Reduced by 60%. Thermal Conductivity: 1.8 W/(m·K) (Superior to Silica Bricks). Economic Analysis: Initial Cost: 50–60% Lower than Zirconia–Corundum Bricks. Maintenance Frequency: 3-Year Major Overhaul-Free Interval (Traditional: 2 Years). Physicochemical Indicators: Basic Indicators: – Bulk Density: 2.5–3.2 g/cm³ (by Grade). – Thermal Shock Stability: ≥15 Cycles (1100℃ Water Cooling). High-Temperature Performance: – Creep Softening Point: 1420–1750℃. – Reburning Linear Change: ≤0.5% (1600℃ × 3 h). Special Requirements: – Alkali Resistance: K₂O Erosion ≤1.0 mm/100 h. – Thermal Shock Resistance: Nano-Type ≥30 Cycles.
Third-grade high-alumina brick
High-Alumina Refractory Brick Product Types and Grading Standards Based on Al₂O₃ Content (GB/T 2988–2025) Ultra‑High‑Alumina Bricks (LZ‑80): Al₂O₃ ≥ 80%, Apparent Porosity ≤ 18% First‑Grade High‑Alumina Bricks (LZ‑75): 75% ≤ Al₂O₃ < 80%, Softening Temperature under Load ≥ 1700℃ Second‑Grade High‑Alumina Bricks (LZ‑65): 65% ≤ Al₂O₃ < 75%, Compressive Strength ≥ 60 MPa Third‑Grade High‑Alumina Bricks (LZ‑55): 55% ≤ Al₂O₃ < 65%, Bulk Density 2.3–2.5 g/cm³ Functional Products: Nano‑Modified High‑Alumina Bricks: Incorporating 5–8% nano‑Al₂O₃, enhancing thermal shock resistance by 50%. Low‑Carbon High‑Alumina Bricks: Reducing firing temperatures to 1400℃, cutting CO₂ emissions by 12%. Micro‑Expansion High‑Alumina Bricks: Exhibiting a high‑temperature linear expansion of +0.3%, effectively compensating for shrinkage. Modern Production Processes: Intelligent Raw Material System: AI‑based sorting of alumina bauxite with Al₂O₃ content variation ≤ 0.5%. Composite Binders: A blend of silica fume and α‑Al₂O₃ nanopowder. Digital Press Molding: Hydraulic press with a pressure range of 160–200 MPa; online 3D scanning for dimensional inspection with an accuracy of ±0.3 mm. Green Firing Technology: Hydrogen‑powered tunnel kilns operating at temperatures between 1500–1600℃, coupled with waste heat recovery systems that reduce energy consumption by 25%. Applications & Application Areas: Application Locations & Performance Benefits: New Energy Lithium‑Ion Battery Sintering Kilns: Service life extended to 3 years. Electronic Glass Borosilicate Melting Furnaces: Energy consumption reduced by 18%. Hydrogen Energy Equipment Electrolyzer Insulation Layers: Heat loss minimized by 35%. Environmental Hazardous Waste Incinerators: Corrosion resistance improved by 40%. Core Performance Advantages Compared to Traditional Materials: Refractoriness: 1790℃ (compared to just 1650℃ for clay bricks). Slag Resistance: SiO₂ erosion rate reduced by 60%. Thermal Conductivity: 1.8 W/(m·K) (superior to silicon bricks). Economic Analysis: Initial Cost: 50–60% lower than zirconia‑corundum bricks. Maintenance Frequency: 3 years without major overhauls (compared to the traditional 2 years). Basic Physical and Chemical Indicators: – Bulk Density: 2.5–3.2 g/cm³ (depending on grade). – Thermal Shock Stability: ≥ 15 cycles (water quench at 1100℃). High‑Temperature Performance: – Softening Temperature under Load: 1420–1750℃. – Linear Change After Reheating: ≤ 0.5% (at 1600℃ for 3 hours). Special Requirements: – Alkali Resistance: K₂O erosion ≤ 1.0 mm/100 h. – Thermal Shock Resistance: Nano‑type products achieve ≥ 30 cycles.
Types and Grading Standards for High-Alumina Refractory Bricks Based on Al₂O₃ Content (GB/T 2988–2025) Special-Grade High-Alumina Brick (LZ-80): Al₂O₃ ≥ 80%; Apparent Porosity ≤ 18% First-Grade High-Alumina Brick (LZ-75): 75% ≤ Al₂O₃ < 80%; Softening Temperature under Load ≥ 1700℃ Second-Grade High-Alumina Brick (LZ-65): 65% ≤ Al₂O₃ < 75%; Compressive Strength ≥ 60 MPa Third-Grade High-Alumina Brick (LZ-55): 55% ≤ Al₂O₃ < 65%; Bulk Density 2.3–2.5 g/cm³ Functional Products: Nano-Modified High-Alumina Brick: Contains 5–8% nano-Al₂O₃, improving thermal shock resistance by 50%. Low-Carbon High-Alumina Brick: Sintering temperature reduced to 1400℃, with CO₂ emissions cut by 12%. Micro-Expansion High-Alumina Brick: High-Temperature Linear Expansion +0.3%, compensating for shrinkage. Modern Production Processes: Intelligent Raw-Material System: AI-based sorting of high-alumina bauxite (Al₂O₃ variation ≤ 0.5%). Composite Binder: Silica Micropowder + α-Al₂O₃ Nanopowder. Digital Press Molding: Hydraulic Press Pressure: 160–200 MPa; On-Line 3D Scanning for Dimensional Inspection (Accuracy ±0.3 mm). Green Sintering Technologies: Hydrogen-Fueled Tunnel Kiln (Temperature 1500–1600℃); Waste Heat Power Generation System (Energy Consumption Reduced by 25%). Applications: Application Areas and Usage Locations—Performance Benefits New-Energy Lithium-Battery Sintering Kilns: Service Life Extended to 3 Years. Electronic Glass—High-Borosilicate Melting Furnaces: Energy Consumption Reduced by 18%. Hydrogen-Energy Equipment—Electrolyzer Insulation Layers: Heat Loss Reduced by 35%. Environmental Protection—Hazardous-Waste Incinerators: Corrosion Resistance Improved by 40%. Core Performance Advantages Compared with Traditional Materials: Refractoriness: 1790℃ (Clay Bricks Only 1650℃). Slag Resistance: SiO₂ Erosion Rate Reduced by 60%. Thermal Conductivity: 1.8 W/(m·K) (Superior to Silica Bricks). Economic Analysis: Initial Cost: 50–60% Lower than Zirconia–Corundum Bricks. Maintenance Frequency: 3-Year Major Overhaul-Free Period (Traditional: 2 Years). Physicochemical Indicators—Basic Metrics: - Bulk Density: 2.5–3.2 g/cm³ (by Grade). - Thermal Shock Stability: ≥15 Cycles (1100℃ Water Cooling). High-Temperature Performance: - Creep Softening Point: 1420–1750℃. - Line Change After Reheating: ≤0.5% (1600℃ × 3 h). Special Requirements: - Alkali Resistance: K₂O Erosion ≤ 1.0 mm/100 h. - Thermal Shock Resistance: Nano-Type ≥ 30 Cycles.
High-Alumina Refractory Brick Product Types and Grading Standards Based on Al₂O₃ Content (GB/T 2988–2025) – Special Grade High-Alumina Brick (LZ-80): Al₂O₃ ≥ 80%, Apparent Porosity ≤ 18% – First Grade High-Alumina Brick (LZ-75): 75% ≤ Al₂O₃ < 80%, Softening Temperature under Load ≥ 1700℃ – Second Grade High-Alumina Brick (LZ-65): 65% ≤ Al₂O₃ < 75%, Compressive Strength ≥ 60 MPa – Third Grade High-Alumina Brick (LZ-55): 55% ≤ Al₂O₃ < 65%, Bulk Density 2.3–2.5 g/cm³ Functional Products: – Nano‑Modified High-Alumina Bricks: Incorporating 5–8% nano-Al₂O₃, enhancing thermal shock resistance by 50%. – Low‑Carbon High-Alumina Bricks: Reducing firing temperatures to 1400℃, cutting CO₂ emissions by 12%. – Micro‑Expansion High-Alumina Bricks: Exhibiting a high‑temperature linear expansion of +0.3%, effectively compensating for shrinkage. Modern Production Processes: – Intelligent Raw Material System: AI‑driven sorting of high‑alumina bauxite with Al₂O₃ content fluctuations no greater than 0.5%. – Composite Binders: A blend of silica fume and α‑Al₂O₃ nanopowder. – Digital Press Molding: Hydraulic press with pressures ranging from 160–200 MPa; online 3D scanning for dimensional inspection, achieving an accuracy of ±0.3 mm. – Green Firing Technologies: Hydrogen‑powered tunnel kilns operating at temperatures between 1500–1600℃, coupled with waste heat recovery systems that reduce energy consumption by 25%. Application Areas & Performance Benefits: – New Energy Lithium‑Ion Battery Sintering Kilns: Service life extended to 3 years. – Electronic Glass Borosilicate Melting Furnaces: Energy consumption reduced by 18%. – Hydrogen Energy Equipment Electrolyzer Insulation Layers: Heat loss minimized by 35%. – Environmental Hazardous Waste Incinerators: Corrosion resistance improved by 40%. Core Performance Advantages Compared to Traditional Materials: – Refractoriness: 1790℃ (compared to just 1650℃ for clay bricks). – Slag Resistance: SiO₂ erosion rate reduced by 60%. – Thermal Conductivity: 1.8 W/(m·K) (superior to silicon bricks). Economic Analysis: – Initial Cost: 50–60% lower than zirconia‑corundum bricks. – Maintenance Frequency: 3 years without major overhauls (compared to the traditional 2 years). Fundamental Physical and Chemical Indicators: – Bulk Density: 2.5–3.2 g/cm³ (depending on grade). – Thermal Shock Stability: ≥ 15 cycles (water quench at 1100℃). – High‑Temperature Performance: – Softening Temperature under Load: 1420–1750℃. – Linear Change After Reheating: ≤ 0.5% (at 1600℃ for 3 hours). – Special Requirements: – Alkali Resistance: K₂O erosion ≤ 1.0 mm/100 h. – Thermal Shock Resistance: Nano‑type products achieve ≥ 30 cycles.
High-Alumina Brick Grade 2 T39
High‑Alumina Refractory Brick Product Types and Grading Standards Based on Al₂O₃ Content (GB/T 2988–2025) — Special‑Grade High‑Alumina Brick (LZ‑80): Al₂O₃ ≥ 80%, Apparent Porosity ≤ 18% — First‑Grade High‑Alumina Brick (LZ‑75): 75% ≤ Al₂O₃ < 80%, Softening Temperature under Load ≥ 1700℃ — Second‑Grade High‑Alumina Brick (LZ‑65): 65% ≤ Al₂O₃ < 75%, Compressive Strength ≥ 60 MPa — Third‑Grade High‑Alumina Brick (LZ‑55): 55% ≤ Al₂O₃ < 65%, Bulk Density 2.3–2.5 g/cm³ Functional Products: — Nano‑Modified High‑Alumina Bricks: Incorporating 5–8% nano‑Al₂O₃, enhancing thermal shock resistance by 50%. — Low‑Carbon High‑Alumina Bricks: Reducing firing temperature to 1400℃, cutting CO₂ emissions by 12%. — Micro‑Expansion High‑Alumina Bricks: Exhibiting a high‑temperature linear expansion of +0.3%, effectively compensating for shrinkage. Modern Production Processes: — Intelligent Raw Material System: AI‑driven sorting of high‑alumina bauxite with Al₂O₃ content variation no greater than 0.5%. — Composite Binders: A blend of silica fume and α‑Al₂O₃ nanopowder. — Digital Press Molding: Hydraulic press with a pressure range of 160–200 MPa; online 3D scanning for dimensional inspection with an accuracy of ±0.3 mm. — Green Firing Technology: Hydrogen‑powered tunnel kilns operating at temperatures between 1500–1600℃, coupled with waste heat recovery systems that reduce energy consumption by 25%. Applications & Application Areas: — Use Locations & Performance Benefits: — New Energy Lithium‑Ion Battery Sintering Kilns: Extending service life to 3 years. — Electronic Glass Borosilicate Melting Furnaces: Reducing energy consumption by 18%. — Hydrogen Energy Equipment Electrolyzer Insulation Layers: Cutting heat loss by 35%. — Environmental Hazardous Waste Incinerators: Improving corrosion resistance by 40%. Core Performance Advantages Compared to Traditional Materials: — Refractoriness: 1790℃ (compared to just 1650℃ for clay bricks). — Slag Resistance: Reducing SiO₂ erosion rate by 60%. — Thermal Conductivity: 1.8 W/(m·K) (superior to silicon bricks). Economic Analysis: — Initial Cost: 50–60% lower than zirconia‑corundum bricks. — Maintenance Frequency: 3 years without major overhauls (compared to the traditional 2 years). Basic Physical and Chemical Indicators: — Bulk Density: 2.5–3.2 g/cm³ (depending on grade). — Thermal Shock Stability: ≥ 15 cycles (water quench at 1100℃). — High‑Temperature Performance: — Softening Temperature under Load: 1420–1750℃. — Linear Change After Reheating: ≤ 0.5% (at 1600℃ for 3 hours). — Special Requirements: — Alkali Resistance: K₂O erosion ≤ 1.0 mm/100 h. — Thermal Shock Resistance: Nano‑type products withstand ≥ 30 cycles.
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