Acid-resistant castable
Category:
Description:
Acid-resistant castable
I. Main Product Types
- Water glass–bonded type
- Ingredients: Water glass ( 13–16%) + Sodium Fluorosilicate (coagulant)
- Acid resistance ≥96%, applicable temperature: 800–1200℃
- Typical formulation: Acid‑resistant aggregate 60–75% + 25–30% powder
- Composite bonding type
- Two‑component system: Aluminum phosphate +Silica sol
- Improved acid resistance 40% (in a concentrated sulfuric acid environment)
- The construction operable time has been extended to 90 minutes
- Lightweight and acid-resistant
- Bulk density 1.0–1.4 g/cm³
- Thermal conductivity 0.12–0.90 W/(m·K)
- Used in weight‑reduction applications such as chimney linings.
II. Modern Production Processes
- Intelligent Ingredient Mixing System
- Aggregates AI Sorting (Acid Resistance ≥ 98%)
- Nano‑scale modification of powder materials ( SiO₂ particle size ≤ 100 nm)
- Low-temperature curing technology
- Steam curing at 80–120°C (reduces the time required to meet strength requirements by 50%)
- Microwave‑assisted curing (reduced energy consumption) 35%)
- Environmental protection additives
- Chromium‑free coagulant (alternative to sodium fluorosilicate)
- Organic fiber reinforcement (enhanced crack resistance) 3 times)
III. Applications
| Application Fields |
Site of Use |
Technical Benefits |
| Environmental protection |
Lining of the desulfurization tower |
Acid resistance lifespan ≥5 years |
| Chemical industry |
Anti-corrosion layer for pickling tanks |
Extended maintenance cycle 300% |
| Electricity |
Chimney lining |
Weight loss 40% |
| Metallurgy |
Acid Recovery Unit |
Temperature resistance increased to 1300℃ |
IV. Performance Advantage Comparison
- Compared with traditional materials
- Construction Efficiency: Overall casting is faster than acid-resistant brick masonry. 5 times
- Waterproofing performance: Improved airtightness 60% (Chimney Applications)
- Economic Analysis
- Overall cost: Lower than that of lead-lined structures. 70%
- Service life: Longer than traditional mortar. 2–3 times
V. Physicochemical Indicators
1. Basic Performance (Water Glass Type):
- Withstand Voltage Strength: ≥25MPa ( 110℃ Drying)
- Flexural strength: ≥6MPa ( 1000℃ Heat treatment)
- Acid resistance:
- 98% Sulfuric Acid Immersion: Strength Retention Rate ≥95% ( 30 Day)
- Hot, concentrated hydrochloric acid environment: Erosion depth ≤1mm/ Year
- Construction parameters:
- Initial setting time: 40-120min (Adjustable)
- Fluidity: ≥180mm (According to the construction method)
Keywords:
Acid-resistant castable
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Address: Chengguan Industrial Zone, Xinmi City, Henan Province
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