The core principle for selecting ceramic liner/lining thickness is to match the operational conditions' strength requirements, rather than blindly pursuing greater thickness. The selection should be determined comprehensively based on factors such as medium characteristics, wear type, and equipment location. Below are specific guidelines for selection:
1. Direct selection based on typical operating conditions
Condition Type | Recommended Thickness | Application Description
Light Wear: 2 mm | Pure flue gas ash removal, low-velocity fine powder conveying with no significant particle impact
Normal Wear: 3 mm | Slurry conveying in grinding processes, straight sections of coal powder pneumatic conveying at particle velocities of 16–24 m/s
Moderate Wear: 5–6 mm | Pipe bends, reducers, and other high-impact areas; dry conveying of powders up to 2 mm in size
Severe Wear: 9–12 mm | High-concentration slurry transport (solid content 40%–60%), conveying of large mineral particles
Heavy Impact Load: 10–15 mm | Ball mill liners, crusher discharge chutes, hoppers subjected to direct impact from large bulk materials
II. Key Selection Criteria:
Condition Type | Recommended Thickness | Application Description
Light Wear: 2 mm | Pure flue gas ash removal, low-velocity fine powder conveying with no significant particle impact
Normal Wear: 3 mm | Slurry conveying in grinding processes, straight sections of coal powder pneumatic conveying at particle velocities of 16–24 m/s
Moderate Wear: 5–6 mm | Pipe elbows, reducers, and other high-impact areas; dry powder conveying with particle size under 2 mm
Particle Size of Medium: Select 3 mm for particles ≤5 mm; 5 mm for 5–20 mm; ≥8 mm for large particles or velocities ≥15 m/s.
Variation in Wear Locations: Ceramic thickness for elbows, tees, and other complex fittings must be increased by 2–3 mm compared to straig
Severe Wear: 9–12 mm | High-concentration slurry transport (solid content 40%–60%), large-grain ore conveying.
ht pipe sections to compensate for additional wear caused by particle impacts.
Temperature Limitations: For applications with temperatures ≥200°C, simply increasing thickness is insufficient-allow a thermal expansion gap of 0.3–0.5 mm to prevent ceramic cracking due to thermal stress.
III. Critical Warnings to Avoid Mistakes
Thicker ceramics are not always better: Excessive thickness reduces thermal shock resistance, increases the risk of cracking during temperature fluctuations, and significantly raises weight and installation costs.
When selecting specifications, provide suppliers with three core parameters-particle size, flow velocity, and temperature-to ensure a more accurate and optimized solution than asking only about thickness.Heavy Impact Load | 10–15 mm | Ball mill liners, crusher discharge chutes, hoppers subjected to direct impact from large bulk materials
II. Key Selection Criteria
Particle Size of Medium: Select 3 mm for particles ≤5 mm; 5 mm for 5–20 mm; ≥8 mm for large particles or velocities ≥15 m/s.
Variation in Wear Locations: Ceramic thickness for fittings such as elbows and tees must be increased by 2–3 mm compared to straight pipe sections to compensate for additional wear caused by particle impacts.
Temperature Limitations: For applications with temperatures ≥200°C, simply increasing thickness is insufficient-allow a thermal expansion gap of 0.3–0.5 mm to prevent ceramic cracking due to thermal stress.
III. Critical Tips to Avoid Mistakes:
Thicker ceramics are not always better: Excessive thickness reduces thermal shock resistance, increases the risk of cracking during temperature fluctuations, and significantly raises weight and installation costs.
When selecting specifications, provide suppliers with three key parameters-particle size, flow velocity, and temperature-to ensure a more accurate and optimized solution than asking only about thickness.