Products
Prefabricated Shapes
Precast, pre-fired functional refractories — delivered ready to install, cutting downtime and on-site labour.
Hofai precast shapes are cast under vibration from low-cement castables, cured, dried and pre-fired under controlled schedules. Installation needs no on-site bake-out: shapes go in, line-up time goes down, and quality is locked in at the factory.
Product range
Impact Pads & Flow Modifiers
Tundish pads, dams and weirs with engineered flow geometry.
- Improves steel cleanliness
Well Blocks & Seat Blocks
Precision blocks for purging plugs, slide gates and nozzles.
- Tight tolerances, precise fit
Roof Deltas & Electrode Surrounds
Corundum-based EAF and LF roof components.
- High thermal-shock resistance
Launders & Runners
Precast launder sections for iron, steel and non-ferrous transfer.
- Fast exchange concept
Lintels, Ports & Custom Shapes
Made-to-drawing shapes up to several tonnes per piece.
- Design support from our engineers
Ladle Bottoms & Impact Blocks
Precast ladle impact areas for quick hot repair.
- Extends ladle campaigns
Typical properties
Typical values for reference only — detailed datasheets available on request.
| Property | Corundum-spinel precast | Al₂O₃-SiC-C precast | Bauxite-based precast |
|---|---|---|---|
| Al₂O₃ (%) | ≥ 90 | ≥ 70 | ≥ 80 |
| Bulk density (g/cm³) | ≥ 3.00 | ≥ 2.90 | ≥ 2.75 |
| CCS (MPa, 110 °C) | ≥ 60 | ≥ 45 | ≥ 50 |
| MOR (MPa, 1450 °C×3h) | ≥ 10 | ≥ 8 | ≥ 8 |
| Max service temp. (°C) | 1750 | 1650 | 1600 |
Applications
Tundish and ladle functional zones, EAF/LF roofs, blast furnace cast house, reheating furnaces and non-ferrous applications. Custom shapes produced from customer drawings with full dimensional inspection.