Silicon carbide castable

Silicon Carbide Castables I. Main Product Types Standard Grade (SiC-70): SiC content 65–75%, Al₂O₃ 15–25%, bulk density 2.5–2.7 g/cm³; suitable for temperatures up to 1450°C (in cement kiln decomposition furnaces). High-Purity Grade (SiC-90): SiC ≥ 85%, with a nano-SiO₂ coating added; apparent porosity ≤ 15%, capable of withstanding temperatures up to 1600°C (critical components in waste incineration furnaces). Composite Reinforced Grade: SiC–ZrO₂ gradient structure (with 15% ZrO₂ on the surface); thermal shock resistance ≥ 30 cycles (water quench at 1100°C); alkali corrosion resistance improved by 50%. II. Production Processes Low-Temperature Firing Technology: Microwave-Assisted Drying (reducing energy consumption by 40%); Nitrogen‑Protected Sintering at 1450°C (compared to the traditional requirement of 1600°C); Digital Quality Control: Online Thermal Imaging Monitoring (temperature deviation ±5°C); AI Prediction Models (strength deviation ≤ 3%). III. Applications Application Areas & Typical Cases: Key Performance Improvements: – Extended service life of new energy lithium battery sintering kilns to 5 years. – Increased corrosion resistance by +70% for linings in hazardous waste melting furnaces. – Enhanced thermal shock stability of 25 cycles in the transition zone of cement rotary kilns. – Reduced power consumption by 8% on the sidewalls of metallurgical aluminum electrolysis cells. IV. Performance Advantages – Compared with Traditional Materials: Thermal Conductivity: 12 W/(m·K) vs. high-alumina bricks at 1.8 W/(m·K). Wear Resistance: Volume wear ≤ 5 cm³ (ASTM C704). CO Corrosion Resistance: Strength retention ≥ 90% after 1000°C/200 hours. Economic Analysis: Initial Cost: 60% lower than electrofused zirconia–corundum bricks. Maintenance Costs: No major overhauls required for 3 years (compared to the traditional 1.5 years). V. Physicochemical Specifications 1. Basic Performance (SiC-70): – Compressive Strength: ≥ 60 MPa (110°C × 24 h). – High-Temperature Flexural Strength: ≥ 8 MPa (1400°C × 3 h). Thermal Properties: – Coefficient of Thermal Expansion: 4.5 × 10⁻⁶/°C (20–1000°C). – Thermal Shock Resistance: ≥ 20 cycles (from 1100°C to water quench). Chemical Stability: – Acid Slag Resistance: Erosion depth ≤ 1.2 mm/24 h. – Alkali Penetration Resistance: K₂O penetration ≤ 0.8 mm.

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Silicon carbide castable

I. Main Product Types

Standard type ( SiC-70)

SiC content: 65–75%, Al₂O₃: 15–25%
Bulk density 2.5–2.7 g/cm³
Applicable temperature ≤ 1450℃ (cement kiln calciner)

High-purity type ( SiC-90)

SiC ≥ 85%, with a nano-SiO₂ coating added.
Apparent porosity ≤ 15%
Temperature resistance up to 1600℃ (key components of waste incineration furnaces)

Composite Reinforced

SiC–ZrO₂ gradient structure (15% ZrO₂ on the surface)
Thermal shock resistance ≥ 30 cycles (water cooling at 1100℃)
Enhanced alkali resistance 50%

2. Production Process

Low-temperature firing technology

Microwave-assisted drying (reduced energy consumption) 40%)
Sintering under nitrogen protection at 1450℃ (compared to the traditional requirement of 1600℃)

Digital Quality Control

Online thermal imaging monitoring (temperature difference ±5℃)
AI prediction model (strength deviation ≤ 3%)

III. Applications

Application Fields	Typical Cases	Key Indicator Improvement
New Energy	Lithium battery sintering kiln	Lifespan extended to 5 years.
Environmental protection	Lining for Hazardous Waste Melting Furnace	Corrosion resistance +70%
Building materials	Cement Rotary Kiln Transition Zone	Thermal shock stability: 25 cycles
Metallurgy	Aluminum electrolytic cell sidewall	Electricity consumption reduced by 8%.

IV. Performance Advantage Comparison

Compared with traditional materials

Thermal conductivity: 12 W/(m·K) vs. high-alumina brick: 1.8 W/(m·K)
Wear Resistance: Volume Wear ≤ 5 cm³ (ASTM C704)
Resist CO erosion: Strength retention ≥90% (1000℃/200h)

Economic Analysis

Initial cost: Lower than that of electrofused zirconia‑alumina bricks. 60%
Maintenance costs: 3-year major overhaul exemption (compared to the traditional 1.5 years)

V. Physicochemical Indicators

1. Basic Performance ( SiC-70 ):

- Withstand Voltage Strength: ≥60MPa ( 110℃ × 24 h )

- High-temperature flexural strength: ≥8MPa ( 1400℃ × 3 hours )

Thermal Properties:

- Coefficient of thermal expansion: 4.5 × 10⁻⁶/°C ( 20–1000°C )

- Thermal Shock Stability: ≥20 Next ( 1100℃→ Water-cooled)

Chemical stability:

- Acid-resistant slag: Erosion depth ≤1.2mm/24h

- Alkali-resistant penetration: K₂O Penetration ≤0.8mm

Keywords:

Silicon carbide castable

Ceramic Wear-Resistant Coating (Wear-Resistant High-Temperature Coating)

Lightweight Insulating Castable

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Email：zzjsrefractory@gmail.com

Silicon carbide castable

Silicon carbide castable

I. Main Product Types

2. Production Process

III. Applications

IV. Performance Advantage Comparison

V. Physicochemical Indicators

COOKIES

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