LMM TOTAI offer a complete product and service portfolio for all steelmaking processes.
From basic and non-basic bricks and mixes, slide gate plates, isostatic products and prefab components to special machinery, mechanisms and repair systems.
High alumina castable for tundish
High alumina castable for tundish
| Use | Bland | |||
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The cover of tundish： | high alumina castable | LY-CFC-16T |
| LY-CFC-18T | ||||
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The castable for the lining : | high alumina castable | LY-CFC-TD-80 | |
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Bricks for slag dam : | magnesia bricks | LY-TBX-SY-1 | |
| high alumina bricks | LY-TBX-A2 | |||
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Coating materials : | magnesia coat | LY-TD-C-M7 | |
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Block for impact zone： | Al2O3-SiC-C block | LY-LD-AGX-T2 | |
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Nozzle for casting： | zirconia nozzle | LY-YZN | |
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Well block： | high alumina block | LY-SK35 | |
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Ramming materials： | SiO2-Al2O3-SiC ramming materials | LY-R-AMC | |
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Repairing materials by trowelling： | high alumina castable | LY-C-170M | |
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Patching materials : | high alumina | LY-P-AP60 | |
| LY-P-AP80 |
The used position: for the lining
Select modle: LY-CFC-TD-80
| Brand | LY-CFC-TD-80 | LY-CFC-TD-65 | LY-CFC-TD-60 | ||
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Chemical composition(%) | Al2O3 | 80 | 65 | 60 |
| SiO2 | 16 | 31 | 36 | ||
| Maximum grain(mm) | 8 | 8 | 8 | ||
| Cold crushing strength(MPa) | 110℃×24h | 40 | 50 | 55 | |
| 1000℃×3h | 70 | 90 | 100 | ||
| 1500℃×3h | 95 | 90 | 100 | ||
| Linear change (%) | 1500℃×3h | -0.1 | -0.1 | -0.1 | |
| 1500℃×3h | 0.3 | 0.7 | 0.8 | ||
| Thermal linear expansion(%) at 1000℃ | 0.6 | 0.5 | 0.5 | ||
| Mixing water(%) | 5.0-6.0 | 6.5-7.5 | 6.0-7.0 | ||
| Quantity required (kg/m2) | 2,850 | 2,500 | 2,400 | ||
The used position: for the cover
Select modle: LY-CFC-16T/LY-CFC-18T
Comparing Characteristics of LY-CFC-16T and LY-CFC-18T
| Characteristics | 『LY-CFC-16T』 | 『LY-CFC-18T』 |
| ・No large shrinkage and expansion ・No bias of expansion and shrinkage in heating and cooling. | Reduce gap of expansion and shrinkage in repeated heating by using chamotte and high alumina aggregates. | Reduce tendency of shrinkage in repeated heating by adding expansible raw material to high alumina aggregates. |
| ・No corrosion under used temperature ・Few formation of low melting point material | Low cement castable contained over 50 ％ alumina. Superior heat resistance. | Low cement castable contained over 80％ alumina. Greater heat resistance than LY-CFC-16T. |
| ・No peeling during operation. | Prevent peeling by adding heat resistance stainless fiber. | Prevent peeling by adding heat resistance stainless fiber. |
| ・Cost ・Quantity reguired | ・Cheaper than 18T. ・Quantity required is few, and unit price is cheap. | ・More expensive than 16T. ・Much quality required |
Evaluation of LY-CFC-16T and LY-CFC-18T
『LY-CFC-16T』
- Tundish cover material for general purpose
- For customers required volume stability
- Basic material to develop new material in order to fulfill customer’s multi needs.
『CFC-18T』
- Recommended in usage condition required more heat resistance than 16T.
- For customers required high corrosion resistane and high heat resistance
Technical Data
| Brand | LY-CFC-16T | LY-CFC-18T | |
| Maximum Service Temperature(℃) | 1600 | 1800 | |
| Chemical Composition(%) | Al2O3 | 56 | 82 |
| SiO2 | 39 | 14 | |
| SiC | 3 | ||
| Maximum grain (mm) | 8 | 8 | |
| Cold Crushing Strength(MPa) | 110℃×24h | 50 | 40 |
| 1500℃×3h | 85 | 78 | |
| Linear Change(%) | 110℃×24h | -0.1 | -0.1 |
| 1500℃×3h | 0.9 | 0.1 | |
| Water Required (%) | 7.0～9.0 | 6.0～8.0 | |
| Quantity Required(kg/m3） | 2400 | 2800 | |
| Feature | ・General purpose ・Used at blast furnace and electric arc furnace | ・High heat resistance ・Used for electric arc furnace | |
- Repairing materials by trowelling
Select modle: LY-C170M - Patching materials
Select modle: LY-P-AP60/LT-P-AP80
Brand LY-P-AP60 LY-P-AP80 LY-C-170M 
Chemical composition(%) Al2O3 60 60 60 SiO2 34 60 60 Cold crushing strength(MPa) 110℃×24h 5 60 60 1000℃×3h 10 60 60 1500℃×3h 25 60 60 Linear change (%) 1000℃×3h – 60 60 1500℃×3h -1.5 60 60