Products — Metallurgical industry
Converters, electric arc furnaces, ladles, tundishes and reheating furnaces — carbon-bonded brick, corundum and spinel castables, dry ramming mixes and tundish coatings engineered for slag attack, thermal shock and long campaign life.
Product catalogue
Castables
High-purity corundum and mullite aggregates for ladle covers, furnace roofs and burner blocks operating up to 1650 °C.
| Model | RTSA-C-94 | RTSA-CM-88 | RTSA-CM-80 | RTSA-CM-72 |
|---|---|---|---|---|
| Maximum service temperature (°C) | 1650 | 1600 | 1600 | 1550 |
| Al2O3 (%) ≥ | 94 | 88 | 80 | 72 |
| SiO2 (%) ≤ | 0.5 | 6 | 15 | 25 |
| Fe2O3 (%) ≤ | 0.3 | 0.5 | 0.8 | 1 |
| Bulk density (g/cm³) ≥ | 3.1 | 2.9 | 2.7 | 2.5 |
| Compressive strength (MPa) ≥ | 90 | 80 | 70 | 60 |
| Linear change after firing (%) ≤ | -0.3 | -0.3 | -0.4 | -0.5 |
Castables
General-purpose dense high-alumina castable for launders, furnace doors and transition linings up to 1600 °C.
| Model | RTSA-16 | RTSA-16K |
|---|---|---|
| Maximum service temperature (°C) | 1500 | 1600 |
| Al2O3 (%) | ≤72 | ≤82 |
| SiO2 (%) | ≥20 | ≥15 |
| Bulk density 110 °C×24h (g/cm³) | ≥2.55 | ≥2.85 |
| Flexural strength 110 °C×24h (MPa) | ≥10 | ≥12 |
| Flexural strength 1100 °C×3h (MPa) | ≥12 | ≥12 |
| Compressive strength 110 °C×24h (MPa) | ≥80 | ≥120 |
| Compressive strength 1100 °C×3h (MPa) | ≥110 | ≥140 |
| Linear change 1100 °C×3h (%) | -0.1 ~ -0.3 | -0.1 ~ -0.3 |
| Reference water for construction (%) | 6~7 | 6~7 |
Shaped bricks
Fired high-alumina brick in 55, 65 and 75 % Al2O3 grades for hot blast stoves, soaking pits and heating furnaces.
| Model | RT-LZ-75 | RT-LZ-65 | RT-LZ-55 |
|---|---|---|---|
| Al2O3 (%) | 75 | 65 | 55 |
| SiO2 (%) | 18 | 30 | 35 |
| Apparent porosity (%) | 23 | 23 | 22 |
| Compressive strength (MPa) | 55 | 50 | 45 |
| Maximum service temperature (°C) | 1500 | 1470 | 1450 |
| Refractoriness (°C) | 1790 | 1790 | 1770 |
Castables
Spinel-bonded MgO–Al2O3 castable with excellent slag resistance for steel ladle working linings and permanent layers.
| Model | Am80 | Am70 |
|---|---|---|
| Al2O3 (%) ≥ | 80 | 70 |
| MgO (%) ≥ | 8 | 12 |
| Bulk density 110 °C×24h (g/cm³) ≥ | 2.9 | 2.9 |
| Bulk density 1500 °C×3h (g/cm³) ≥ | 2.8 | 2.8 |
| Compressive strength 110 °C×24h (MPa) ≥ | 45 | 45 |
| Compressive strength 1500 °C×3h (MPa) ≥ | 60 | 60 |
| Linear change 110 °C×24h (%) | 0 ~ -0.1 | 0 ~ -0.1 |
| Linear change 1500 °C×3h (%) | 0 ~ +0.1 | 0 ~ +0.1 |
| Hot flexural strength 1400 °C×30min (MPa) ≥ | 9 | 8 |
Shaped bricks
Resin-bonded MgO–C brick in 10, 14 and 18 % carbon grades for BOF converters, EAF hot spots and ladle slag lines.
| Model | MT-10A | MT-10B | MT-10C | MT-14A | MT-14B | MT-14C | MT-18A | MT-18B | MT-18C |
|---|---|---|---|---|---|---|---|---|---|
| MgO (%) ≥ | 80 | 79 | 77 | 76 | 74 | 72 | 72 | 70 | 69 |
| C (%) ≥ | 10 | 10 | 10 | 14 | 14 | 14 | 18 | 18 | 18 |
| Apparent porosity (%) ≤ | 4.5 | 6 | 4 | 5 | 6 | 3 | 4 | 5 | 5 |
| Bulk density (g/cm³) ≥ | 3.02 | 2.93 | 2.92 | 2.95 | 2.90 | 2.87 | 2.89 | 2.84 | 2.79 |
| Compressive strength (MPa) ≥ | 40 | 40 | 35 | 40 | 35 | 35 | 35 | 30 | 30 |
Castables
Low-cement, self-flowing corundum castable with >90 % Al2O3 for precast shapes, purging plugs and ladle bottoms.
| Model | Value |
|---|---|
| Al2O3 (%) | ≥90 |
| CaO (%) | ≤0.5 |
| Bulk density (g/cm³) ≥ | 3.0 |
| Compressive strength 110 °C×2h (MPa) | 40 |
| Compressive strength 1000 °C×3h (MPa) | 55 |
| Compressive strength 1500 °C×3h (MPa) | 130 |
| Linear change 1000 °C×3h (%) | 0 ~ -0.1 |
| Linear change 1500 °C×3h (%) | 0 ~ -0.2 |
| Refractoriness (°C) | >1750 |
Shaped bricks
Al2O3–MgO–C brick with in-situ spinel formation for ladle barrel and bottom linings; high load softening temperature.
| Model | LMT-76 | LMT-74 | LMT-72 |
|---|---|---|---|
| Al2O3 + MgO (%) | 76 | 74 | 72 |
| MgO (%) ≥ | 14 | 12 | 10 |
| C (%) ≥ | 8 | 8 | 7 |
| Apparent porosity (%) ≤ | 8 | 9 | 10 |
| Bulk density (g/cm³) ≥ | 2.90 | 2.85 | 2.80 |
| Compressive strength (MPa) ≥ | 55 | 45 | 40 |
| Hot flexural strength 1400 °C×30min (MPa) ≥ | 6 | 6 | 5 |
| 0.2 MPa refractoriness under load (°C) ≥ | 1670 | 1630 | 1600 |
Shaped bricks
Magnesia-carbon functional shapes for converter tap holes and ladle nozzle seats, machined to drawing.
| Model | A | B | C |
|---|---|---|---|
| MgO (%) ≥ | 78 | 76 | 74 |
| C (%) ≥ | 10 | 12 | 14 |
| Apparent porosity (%) ≤ | 5 | 4 | 4 |
| Bulk density (g/cm³) ≥ | 3.07 | 3.05 | 3.07 |
| Room-temperature compressive strength (MPa) ≥ | 42 | 42 | 40 |
| Hot flexural strength 1400 °C×30min (MPa) ≥ | 12 | 12 | 10 |
Monolithics & linings
Magnesia-based dry vibrating mix for electric arc furnace and induction furnace bottoms; fast installation, no drying time.
| Model | Value |
|---|---|
| MgO (%) | ≥82 |
| CaO (%) | 7–9 (6–9) |
| Fe2O3 (%) | 5–7 (5–9) |
| SiO2 (%) | ≤1.5 |
| Compressive strength after firing 1300 °C×3h (MPa) | ≤10 |
| Compressive strength after firing 1600 °C×3h (MPa) | ≤25 |
| Linear shrinkage 1300 °C×3h (%) | -0.5 |
| Linear shrinkage 1600 °C×3h (%) | -0.3 |
| Particle bulk density 2–5 mm (g/cm³) | ≥3.25 |
| Grain size range (mm) | 0–5 |
Monolithics & linings
Magnesia–chrome spray/gunning coating for continuous casting tundish working linings; easy deskulling and clean steel.
| Model | Value |
|---|---|
| MgO (%) | ≥85 |
| Cr2O3 (%) | ≥8 |
| CaO (%) | ≤5 |
| Bulk density 110 °C×24h (g/cm³) | ≤2.0 |
| Bulk density 1500 °C×3h (g/cm³) | ≤1.8 |
| Flexural strength 110 °C×24h (MPa) | ≥1.8 |
| Flexural strength 1500 °C×3h (MPa) | ≥2.05 |
| Linear change 110 °C×24h (%) | ≤-0.4 |
| Linear change 1500 °C×3h (%) | ≤-0.4 |
Monolithics & linings
Heavy-duty insulating board used as a compressible expansion and back-up layer behind furnace and ladle linings.
Technical data sheet available on request.
Share your vessel size, steel grades, tap temperature and slag chemistry — our engineers return a zone-by-zone material selection and expected campaign life.
