Magnesium ramming mass


Refractory Ramming Materials I. Main Product Types Silicon Carbide Ramming Material Composition: 45–65% SiC, 15–25% Electrolytically Calcined Anthracite Coal Characteristics: Excellent resistance to aluminum melt erosion; thermal conductivity of 15–20 W/(m·K) Application: Linings for Aluminum Electrolysis Cells Magnesia-Alumina-Chrome Ramming Material Formulation: 60–70% MgO, 10–15% Al₂O₃, 5–8% Cr₂O₃ Advantages: Outstanding slag resistance; softening temperature ≥1700°C Application: Repair of RH Furnace Immersion Tubes Zirconia Ramming Material 配方: ≥60% ZrSiO₄, 20–30% α-Al₂O₃ Fine Powder Features: Resistant to glass corrosion; linear change ≤0.5% (at 1600°C) II. Production Processes Dry Mixing Process (New Technology in 2025) Utilizes a 3D Motion Mixer with CV ≤ 3% Automated Atomization System for Composite Binders (Resin + Phosphate) On-Site Construction Techniques Robot-Assisted Ramming (Pressure: 0.6–1.2 MPa) Infrared Online Density Monitoring (Accuracy: ±2%) Baking and Curing Microwave-Assisted Curing (Reduces curing time by 70%) Temperature Gradient Control (Heating Rate: 5°C/min) III. Application Scenarios Industry 典型 Applications 效益提升 Nonferrous Metallurgy Bottom of Copper Flash Smelting Furnaces Service Life Extended to 18 Months Waste Incineration Hot-Repairs in the Melting Zone Maintenance Costs Reduced by 60% Photovoltaics Polycrystalline Silicon Ingot Casting Furnaces Energy Consumption Reduced by 15% Aerospace Rocket Engine Test Stands Temperature Resistance Up to 2200°C IV. Performance Breakthroughs Comparison with Traditional Castable Materials Permeability Resistance: Increased by 3–5 times (Aluminum melt penetration depth ≤10 mm) Construction Efficiency: Improved by 80% (no formwork or curing required) Economic Indicators Material Utilization Rate: ≥95% (compared to only 85% for castables) Total Cost: Reduced by 30–40% V. Physicochemical Specifications 1. Physical Properties: - Bulk Density: 2.4–3.2 g/cm³ (depending on material composition) - Compressive Strength: ≥40 MPa (after drying at 110°C) High-Temperature Characteristics: - Flexural Strength (at 1400°C): ≥8 MPa - Thermal Shock Stability (water quenching at 1100°C): ≥15 cycles Construction Parameters: - Workable Time: 4–6 hours (at 25°C ambient temperature) - Initial Setting Time: 2–3 hours (for resin-bonded formulations)

Refractory ramming mass

I. Main Product Types

  1. Silicon carbide Quality Ramming material
  • Ingredients: SiC 45–65%, calcined anthracite 15–25%
  • Features: Strong resistance to aluminum melt erosion, high thermal conductivity. 15–20 W/(m·K)
  • Applicable to: Lining of Aluminum Electrolysis Cells
  1. Magnesia-alumina-chrome ramming mass
  • Ratio: MgO 60–70%, Al₂O₃ 10–15%, Cr₂O₃ 5–8%
  • Advantages: Excellent slag resistance and softening temperature. ≥1700℃
  • Applications: RH Furnace Immerse Tube Repair
  1. Zircon‑based ramming mass
  • Recipe: ZrSiO₄ ≥ 60%, α-Al₂O₃ fine powder 20–30%
  • Features: Resistant to glass corrosion, low linear expansion rate. ≤0.5% (1600℃)

2. Production Process

  1. Dry mixing process ( 2025 New Technologies)
  • Using a three-dimensional motion mixer ( CV ≤ 3%)
  • Composite binder (resin) +Phosphate) Automatic Atomization System
  1. On-site Construction Techniques
  • Robot pounding (pressure) 0.6–1.2 MPa)
  • Infrared Online Compaction Detection (Accuracy: ±2%)
  1. Baking and curing
  • Microwave‑Assisted Curing (Shorter Time) 70%)
  • Temperature gradient control ( Heating rate of 5℃/min)

3. Application Scenarios

Industry

Typical Applications

Improved Efficiency

Nonferrous Metallurgy

Bottom of a Copper Flash Smelting Furnace

Life expectancy extended to 18 months

Waste incineration

Hot Repair in the Molten Zone

Maintenance costs reduced 60%

Photovoltaic

Polycrystalline silicon ingot furnace

Reduced energy consumption 15%

Aerospace

Rocket Engine Test Stand

Temperature resistance up to 2200℃

IV. Performance Breakthrough

  1. Comparison with Traditional Castables
  • Anti-permeability: Improved 3–5 times (aluminum melt penetration depth ≤ 10 mm)
  • Construction Efficiency: Improvement 80% (no formwork or curing required)
  1. Economic Indicators
  • Material utilization rate: ≥95% (only 85% for castables)
  • Overall cost: Low 30–40%

V. Physicochemical Indicators

1. Physical Properties:

- Bulk density: 2.4–3.2 g/cm³ (According to material)

- Withstand Voltage Strength: ≥40MPa ( 110℃ After drying)

  1. High-Temperature Properties:

- Flexural strength ( 1400℃ ): ≥8MPa

- Thermal shock stability 1100℃ Water-cooled): ≥15 Next

  1. Construction parameters:

- Construction window: 4-6h ( 25°C Environment)

- Initial setting time: 2-3h (Resin-bonded type)

 


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Magnesium ramming mass

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