Blast Furnace Iron Runner Precast Overhaul
Frequent iron runner relining caused long downtime. Precast trough segments and quick-change blocks cut the overhaul from 5 days to 2 days and are expected to extend runner life by over 30%.
CFB Boiler Wearing Zone Abrasion-Resistant Reline
Dense-phase zones suffered severe particle abrasion. A steel-fibre reinforced SiC wear-resistant lining extended the continuous run from 8 to over 12 months.
Customer：Power plant in Hebei (440 t/h CFB boiler)Location：Tangshan, Hebei
1Challenge
The wearing zone, dense phase and cyclone inlet endured high-velocity 850–900°C particles. Conventional high-alumina castable wore out in about 8 months, forcing shutdowns for repair.
2Solution
Zones were designed separately: steel-fibre reinforced castable for the wearing zone against thermal shock, and SiC wear-resistant castable for the dense phase and cyclone inlet against abrasion. Aggregate grading and water addition were optimised for density, with a standard dry-out schedule.
3Result
Continuous operation extended from 8 to over 12 months with clearly reduced wear. One overhaul now covers a full heating season, cutting total maintenance cost by about 25%.
Related Cases
Cement Rotary Kiln Nose Precast Protection
Frequent thermal shocks caused nose castable spalling. High-alumina/corundum precast blocks replaced cast-in-place lining, lifting life by about 40% and extending the maintenance cycle from 6 to 9 months.
Copper Smelter Roof Hot Repair
Local roof burn-through and cracking was repaired by hot-repair ramming plus gunning seal, cutting repair cost by about 60% and extending roof life for one more campaign.
客服微信 · 17513376789