Ultra-Low-Cement Castable

Ultra-Low Cement Castable

Material System & Positioning

Ultra-low-cement castable (CaO ≤1%) uses high-purity raw materials and ultra-fine powder packing to achieve near-corundum dense structure. It is Henan Songrui's premium grade for harsh service up to 1700℃, with excellent slag penetration resistance, spalling resistance and hot strength for life-critical zones such as ladle slag lines, hot metal ladles and reheating furnace hot sections.

Key Performance

• Ultra-low binder: CaO ≤1%, minimal low-melting phases, much higher load softening point and hot strength.
• High purity & density: bulk density 2.75 g/cm³, low porosity, strong slag penetration resistance.
• Excellent spalling resistance: stable structure against thermal and structural spalling under frequent start-stop.
• High hot strength: CCS (110℃×24h) ≥80 MPa, load-bearing close to corundum products.
• Long life: significantly extended life on ladle slag lines and hot metal ladles.

Applications

• Steel & Iron: ladle slag line and impact zones, hot metal ladle working liners, LF ladle permanent layers, reheating furnace hot hearths and skid blocks, hot blast stove domes.
• Non-ferrous: copper anode/reverberatory furnace hot walls, aluminum melting furnace linings.
• Glass: lower regenerator checkers, port bottoms.
• Waste-to-energy: above-grate high-temperature zones, secondary combustion chamber walls.

Selection Advice

Choose ultra-low-cement for high-temperature, strong-slag, life-critical zones. Compared with low-cement grade it offers superior slag penetration and spalling resistance for slag lines and hot metal ladles; for milder service, low-cement high-alumina offers better economy.

Installation & Maintenance

Strict water control, full vibration, extended curing and slow heat-up per the dedicated curve are mandatory to avoid explosive spalling. Professional installation with Henan Songrui technical guidance is recommended.

Quality Assurance

Henan Songrui New Refractory Materials Co., Ltd. (Xuanhua Town Industrial Park, Henan) is a 2024 Class A taxpayer and SRDI SME. For selection, quotation or installation guidance, contact Manager Zheng (17513376789 / 17513376789@163.com).

• CaO within 1%, ultra-low-cement bond with minimal low-melt phases
• High-purity packed aggregate with very low porosity
• Excellent slag penetration and spalling resistance
• Hot strength and volume stability approaching fired corundum
• For ladle slag lines, hot metal ladles and furnace hot zones
• Strict construction and drying requirements per dedicated curve

Ultra-low cement castable (CaO ≤1%) uses high-purity raw materials for near-corundum performance in the harshest zones:

• Steel & Iron: ladle slag line and impact zones, hot metal ladle working liners, LF ladle permanent layers, reheating furnace hot hearths and skid blocks, BF hot blast stove dome.
• Non-ferrous: copper anode and reverberatory furnace hot walls, aluminum melting furnace linings.
• Glass: regenerator checker lower sections, port bottoms.
• Waste-to-energy: above-grate high-temperature zone, secondary combustion chamber walls.
• Advantage: service up to 1700℃, excellent slag penetration and spalling resistance for slag lines and hot metal ladles.