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%.
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.
Customer：Cement group in Henan (5000 t/d clinker line)Location：Dengfeng, Henan
1Challenge
The kiln nose area suffered severe temperature swings and secondary-air erosion. Cast-in-place castable spalled and broke away within 3–4 months, forcing frequent repairs and hurting clinker output.
2Solution
Blocks were designed to the kiln nose geometry using high-alumina/corundum precast units with integrated anchors, cured and pre-fired in-plant. Units were hoisted as a complete ring and joints packed with high-performance repair mix, minimising wet work on site.
3Result
Nose life improved by about 40% and the maintenance cycle extended from 6 to 9 months. On-site repair time dropped from 7 to 3 days, raising annual kiln availability.
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