Critical Influencing Factors

 

1. Thermal Stress Conditions

 

Temperature Impact:

• Steel temperature directly correlates with refractory wear (1640-1690℃ operational range)
• Thermal cycling during baking→tapping→refining→casting creates significant thermal stress

Resultant effects:

• 30-50% increase in crack propagation rate
• Accelerated structural spalling in porous components like purging plugs

 

2. Slag Interaction

 

Multidimensional Slag Effects:
|| Basic Slag (CaO/SiO₂>2) || Acid Slag (CaO/SiO₂<1) ||
| Penetration Depth | 15-20mm | 8-12mm |
| Corrosion Rate | 0.8-1.2mm/heat | 0.3-0.5mm/heat |
| Viscosity Impact | Low viscosity→Deep penetration | High viscosity→Surface erosion |

 

3. Gas Purging Effects

 

Argon stirring demonstrates dual effects:
• Beneficial: Reduces pO₂ by 40-60% (protecting carbon-containing materials)
• Detrimental: Increases slag-refractory interface turbulence by 25%

 

Secondary Influencing Factors

 

Vacuum degassing: Increases refractory thermal shock frequency

Residence time: Prolonged contact (>150min) accelerates chemical wear

Mechanical stress: Ladle transportation induces structural fatigue

 

NC Refractory Technical Solutions

 

• 28 Years Specialized Manufacturing Experience
• Al₂O₃-MgO-C bricks with nano-scale pore structure
• Gradient-designed purging plugs (5-layer structure)
• Self-repairing castables with spinel phase regeneration