Products
EAF Refractories
Complete lining and consumable packages for electric arc furnaces — from hearth to roof, tap to tap.
Hofai supplies full refractory packages for AC and DC electric arc furnaces, balancing wear performance at hot spots and slag line with overall campaign economy. Lining concepts are tailored to scrap mix, power input and slag practice.
Product range
MgO-C Bricks
Magnesia-carbon bricks based on fused or high-purity sintered magnesia with flake graphite and antioxidants.
- Grades for slag line and hot spots
- C content 5–18% to match duty
- High slag and arc-flare resistance
EBT Tap Hole System
Tap-hole sleeves, end blocks and surrounding bricks for eccentric bottom tapping.
- MgO-C sleeve sets
- Long service life, safe exchange
Tapping Hole Filler (HF series)
EAF drainage sand for the eccentric bottom tap hole — high refractoriness and consistently high free-opening rate.
- Free-opening rate ≥ 98%
- Chromite- and olivine-based recipes
- Safe, consistent tapping
Hearth & Ramming Mixes
Dry magnesia hearth mixes for fast installation and reliable monolithic bottoms.
- Rapid sintering behaviour
- Easy hot repair
Gunning & Fettling Mixes
Basic gunning materials for hot maintenance of slag line and banks.
- High adhesion rate
- Extends lining campaigns
Roof & Delta Precast
Precast corundum-based delta sections and electrode surrounds.
- Pre-fired, ready to install
- Reduced downtime
Typical properties
Typical values for reference only — detailed datasheets available on request.
| Property | MgO-C 14% (slag line) | MgO-C 10% | Hearth mix | Tap hole filler |
|---|---|---|---|---|
| MgO (%) | ≥ 78 | ≥ 82 | ≥ 85 | — |
| C (%) | 14 | 10 | — | — |
| Bulk density (g/cm³) | ≥ 2.95 | ≥ 2.98 | ≥ 2.60* | — |
| Apparent porosity (%) | ≤ 4 | ≤ 4.5 | — | — |
| CCS (MPa) | ≥ 35 | ≥ 38 | — | — |
| Refractoriness (°C) | — | — | ≥ 1800 | ≥ 1800 |
Applications
AC / DC electric arc furnaces for carbon, special and stainless steel; hot spots, slag line, hearth, banks, EBT area, roof delta. Package supply with installation supervision available.