1. Features of Ceramic Wear Liners for Vertical Mill Inlet Chutes
Vertical roller mills are favored in the cement industry for their reliable performance, small footprint, high capacity, low energy consumption, and long service life. As a key component, the inlet chute directly affects the overall production efficiency due to its high impact load, high temperature, and severe abrasive conditions.
When using manganese steel liners, the service life is typically only around 8 months. In comparison, our high-temperature impact-resistant ceramic liners can extend the service life to over 5 years, drastically reducing downtime and maintenance costs.
Typical working conditions of cement vertical mill inlet chute:
| Item | Outlet Air Volume | Internal Ventilation | Max. Inlet Temperature |
|---|---|---|---|
| Parameter | 650,000–750,000 m³/h | 300 m³/min | 230°C |
2. Advantages of High-Temperature Impact-Resistant Ceramic Liners
These liners are made by welding ultra-thick toughened alumina ceramics onto steel plates using stud welding technology, forming a strong and reliable anti-wear layer. The ceramic modules can be pre-installed on steel plates and then mounted onto equipment via welding or countersunk bolts.
(1) Excellent hardness, wear resistance, and impact resistance
Made from Al₂O₃ combined with multiple wear-resistant additives, the ceramics are dry-pressed at 100 tons. They feature high density, toughness, and exceptional wear resistance-266 times that of manganese steel and 171.5 times that of high-chrome cast iron.
(2) Smooth surface, no material sticking or blockage
The unique ceramic formula ensures high surface smoothness and extremely low water absorption, keeping the chute free from material build-up during operation.
(3) Secure installation, no detachment
Both inner and outer steel surfaces are welded, and imported industrial adhesives are used for ceramic-steel bonding. The system provides high bonding strength, excellent heat resistance, and strong resistance to acids, alkalis, and corrosion.
3. Technical Parameters of the Ceramic Liners
| Item | Parameter |
|---|---|
| Main Composition | Al₂O₃ |
| Al₂O₃ Content | ≥92% |
| Density | ≥3.63 g/cm³ |
| Rockwell Hardness (HRA) | ≥85 |
| Vickers Hardness (HV10) | ≥1050 |
| Fracture Toughness (KIC) | ≥4.6 MPa·m¹ᐟ² |
| Water Absorption | ≤0.01% |
| Wear Loss | ≤0.358 cm³ |
High-temperature impact-resistant ceramic liners provide a long-term solution for severe wear areas in cement vertical mills, significantly improving equipment service life and overall production efficiency.
