Chromium corundum brick

Chromium Corundum Refractory Bricks I. Product Types and Grades 1. Standard Series CC-15 Series (Basic Type): Composition: Cr₂O₃ 12–15%, Al₂O₃ ≥80%; Bulk Density: 3.2–3.4 g/cm³; Service Temperature: ≤1600℃. CC-25 Series (High-Performance Type): Cr₂O₃ content 20–25%, with nano-ZrO₂ added; Thermal Shock Resistance: ≥30 cycles (water quenching at 1100℃); Load Softening Point: ≥1750℃. 2. New Composite Products—Core Innovations: Performance Enhancement through Gradient Structure: Cr₂O₃ content graded from 15% to 30%; Gradient Distribution for Improved Erosion Resistance by 50%; Nano-Modified Type: Addition of 5-nm Cr₂O₃-coated corundum particles, increasing strength by 80%; Porous Energy-Saving Type: Closed-pore porosity of 25–30%, reducing thermal conductivity by 40%. II. Intelligent Production Process 1. Raw Material Processing: Plasma-activated chromium oxide powder (Cr₂O₃ ≥99.5%); AI-based raw material batching system with compositional variation ≤0.3%. 2. Forming Process: # Digital forming parameters—pressure = 200–250 MPa; # Isostatic pressing pressure—hold_time = 90–120 s; # Holding time—temperature = 25 ± 2℃; # Forming temperature control. 3. Firing Technology: Hydrogen-powered tunnel kiln (1750–1800℃); waste heat recovery power generation system (30% energy savings). Typical Application Scenarios: Core High-Temperature Industrial Equipment **Nonferrous Metallurgy**: Copper Flash Smelting Furnace (service life 8–10 years); **Chemical Industry**: Coal Gasification Furnace (pressure resistance ≥15 MPa); **Environmental Protection**: Hazardous Waste Melting Furnace (slag resistance improved by 60%). Emerging Fields in 2026: Hydrogen Energy—High-Temperature Components for Electrolyzers (hydrogen embrittlement resistance); Aerospace—Reusability Engine Liners; Nuclear Energy—Fourth-Generation Reactor Containment Layers. IV. Performance Advantage Comparison ### Comparative Analysis with Traditional Materials | Indicator | CC-25 Type | Magnesia-Chrome Brick | Improvement Margin || Copper Matte Erosion | 0.8 mm/month | 2.5 mm/month | +68% || High-Temperature Strength | 45 MPa | 28 MPa | +60% || Maintenance Costs | ¥8,000/year | ¥20,000/year | Savings of 60% | Latest Physicochemical Indices (GB/T 2026–CC) 1. Basic Performance—Refractoriness: ≥1850℃; Room-Temperature Compressive Strength: ≥150 MPa (CC-25 type); Apparent Porosity: ≤18% (standard type). 2. High-Temperature Characteristics: Thermal Shock Stability: ≥25 cycles (water quenching at 1100℃). 3. Creep Resistance: Deformation at 1600℃/50 h ≤0.5%. 4. Slag Resistance Testing: Copper Slag Erosion: ≤1.2 mm/100 h (at 1250℃); Alkali Vapor Erosion: Weight Gain ≤0.6%. 3. Safety and Environmental Indicators: Hexavalent Chromium Release: ≤0.05 mg/m² (EN 12485–2025); Radioactivity: Internal Radiation Index ≤0.3.

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Corundum brick

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Chromium Corundum Refractory Brick

I. Product Types and Grading

1. Standard product series

CC-15 Series (Basic type)

Ingredients: Cr₂O₃ 12–15%, Al₂O₃ ≥ 80%
Bulk density: 3.2–3.4 g/cm³
Applicable temperature: ≤1600℃

CC-25 Series (High-performance type)

Cr₂O₃ content: 20–25%, with nano-ZrO₂ added.
Thermal shock resistance: ≥30 cycles (water cooling at 1100°C)
Load-softening point: ≥1750℃

2. New Composite Products

Type	Core Innovation Points	Performance Improvement
Gradient-structured	Gradient distribution of Cr₂O₃ content from 15% to 30%	Erosion resistance +50%
Nano-modified	Adding 5 nm Cr₂O₃-coated corundum particles	80% strength increase
Porous energy-saving	Closed porosity: 25–30%	Thermal conductivity reduced by 40%

II. Intelligent Production Process

1. Raw Material Processing

Using plasma-activated chromium oxide powder ( Cr₂O₃ ≥ 99.5%)
AI Raw Material Proportioning System (Component Fluctuation ≤ 0.3%)

2. Molding Process

# Digital Molding Parameters pressure = 200-250 MPa

# Isostatic pressure hold_time = 90-120s

# Holding pressure time temperature = 25±2℃

# Molding Temperature Control

# 3. Firing Technology - Hydrogen-fired tunnel kiln ( 1750-1800℃ ) - Waste Heat Recovery Power Generation System (Energy Conservation 30% )

Typical application scenarios

High-Temperature Industrial Core Equipment

** Nonferrous Metallurgy ** : Copper flash smelting furnace (service life 8-10 year)

** Chemical industry ** : Coal gasification furnace (pressure-resistant ≥15MPa )

** Environmental protection ** : Hazardous waste melting furnace (enhanced slag resistance 60% )

2026 Emerging fields

Hydrogen Energy: High-Temperature Components of Electrolyzers (Hydrogen-Embrittlement Resistance)

Aerospace: Reusable Engine Liner

Nuclear Energy: Isolation Layers for Fourth-Generation Reactors

IV. Performance Advantage Comparison

### Comparative Analysis with Traditional Materials

| High-temperature strength | 45 MPa | 28 MPa | +60% |

Latest physicochemical indicators ( GB/T 2026-CC )

1. Basic Performance - Refractoriness: ≥1850℃ - Room-temperature pressure resistance: ≥150MPa （ CC-25 Type) - Apparent porosity: ≤18% (Standard type)

2. High-Temperature Properties ： Thermal Shock Stability: ≥25 time(s) ( 1100℃ Water-cooled)

3. Creep resistance: 1600℃/50h Deformation ≤0.5%

4. Slag resistance test:

Copper slag erosion: ≤1.2 mm/100 h （ 1250°C )

Alkali vapor corrosion: weight gain ≤0.6%

3. Safety and Environmental Protection Indicators

Hexavalent chromium leaching: ≤0.05 mg/m² (EN 12485:2025)
Radioactivity: Internal exposure index ≤ 0.3

Keywords:

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WhatsApp：8615936268068

Mobile phone：+86-15936268068

Email：zzjsrefractory@gmail.com

Chromium corundum brick

Chromium Corundum Refractory Brick

I. Product Types and Grading

1. Standard product series

2. New Composite Products

II. Intelligent Production Process

1. Raw Material Processing

2. Molding Process

3. Safety and Environmental Protection Indicators

COOKIES

COOKIES

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