Introduction
KR stirrers are critical consumable equipment for hot metal desulfurization pretreatment. The stirrer, with a cruciform refractory-lined impeller, is immersed into the ladle and rotates at 110–140 rpm, creating a powerful vortex that draws desulfurizing agents into the molten iron for optimal reaction. Grade JH-KR60 features Al₂O₃ ≥60%, SiC+C ≥5%, with bulk density ≥2.51 g/cm³ (110℃×24h) and cold crushing strength ≥25 MPa. The material is engineered to withstand severe thermal shock, slag penetration and mechanical wear.
Key Advantages
01
Excellent Thermal Shock Resistance
Withstands repeated immersion in 1300–1400℃ molten iron, preventing cracking and spalling under cyclic thermal stress during intermittent operation.
02
Reinforced Structural Integrity
Steel core with V-shaped anchors ensures strong refractory-to-steel bonding and uniform thermal expansion, extending stirrer service life.
03
Strong Slag & Wear Resistance
Resists chemical attack from desulfurization slags and mechanical erosion from high-speed rotation, delivering consistent desulfurization efficiency.
Specification
| 项目 | JH-KR60 | |
|---|---|---|
| Al₂O₃ (%) | ≥60 | |
| SiC+C (%) | ≥5 | |
| 体积密度 (g/cm³) | 110℃×24h | ≥2.5 |
| 1500℃×3h | ≥2.45 | |
| 常温抗折强度 (MPa) | 110℃×24h | ≥5 |
| 1500℃×3h | ≥8 | |
| 常温耐压强度 (MPa) | 110℃×24h | ≥25 |
| 1500℃×3h | ≥60 |
