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.
magnesia-carbon-bricks-firebrick and refractory company
Brand: LMM YOTAI
Warranty: 1 year
Sample: Sample testing is available
Certification: ISO9001/ISO14001
Payment method: TT/LC
Shipping method: sea/land/air
Specifications: Customized products according to customer drawings
MgO-C bricks for EAF side wall
| Use | Brand | |||
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Sleeve of electrode： | precast block | LY-CFC-18RX |
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Side wall bricks： | MgO-C bricks | LY-S-NSA-110XMA | |
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Permanent bricks： | magnesia bricks | LY-HPT-B | |
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Stamping materials（dry setting）: | magnesia-dolomite | LY-S-MD-DV | |
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Eccentric bottom tap hole | Terminal block：Al2O3-SiC-C bricks | LY-ASG-X | |
| Tapping tube： MgO-C bricks | LY-MG-15SX | |||
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Electrode of furnace bottom： | MgO-C bricks | LY-MG-16BSX | |
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Gunning repairing material: | magnesia-dolomite materials | LY-G-HD100 |
Side wall refractories for EAF : LY-S-NSA-110XMA
Especially S-NSA has developed as especially for side wall hot spots in bricks for electric arc furnace. In order to meet variety of needs, YOTAI supplies plenty of variations by replacing grade of raw materials or carbon content, introduced below.
Feature of LY-S-NSA
- Base of carbon content is set as 20% to take advantage of carbon characteristics.
- Varieties of brands are developed by corporate with different grades of raw materials and carbon contents.
- High durability is carried out for hot spots by adopting high purity materials and dense construction.
- Bricks used for except hot spots are took into account of balance and durability and cost by replacing grade of materials.
- Low carbon type supports for oxidization damage by oxidization slag.
Technical data of side wall refractories
| Brand | LY-S-NSA-320X | LY-S-NSA-220X | LY-S-NSA-120X | LY-S-NSA-120XMA | LY-S-NSA-130X | LY-S-NSA-115XMA | LY-S-NSA-110XMA | LY-S-NSA-108XMA | |
| Chemical Composition (%) | MgO | 76 | 76 | 77 | 78 | 65 | 82 | 85 | 89 |
| C | 20 | 20 | 20 | 20 | 28 | 15 | 10 | 8 | |
| Physical Property | Bulk Density | 2.85 | 2.88 | 2.9 | 2.95 | 2.78 | 3 | 3.07 | 3.18 |
| Apparent Porosity (%) | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 2 | |
| CCS (MPa) | 30 | 30 | 35 | 40 | 35 | 40 | 45 | 50 | |
| Use | FB, ML | SL, ML | HS, SL | HS , SL | HS | HS, SL | SL | SL | |
| Feature | Low cost | General | Corrosion resistance | Corrosion resistance | High C quantity For HS | General for DC furnace | General for DC furnace Peroxide resistance | For DC furnaces Peroxide desistance | |
FB: Free board part / ML: Metal line part / SL: Slag line part / HS: Hot spot part
MgO-C bricks for EAF bottom tap hole （E.B.T）
| Use | Brand | |||
 |
|
Sleeve of electrode： | precast block | LY-CFC-18RX |
|
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Side wall bricks： | MgO-C bricks | LY-S-NSA-110XMA | |
|
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Permanent bricks： | magnesia bricks | LY-HPT-B | |
|
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Stamp castables（dry setting）: | magnesia-dolomite | LY-S-MD-DV | |
|
|
Eccentric bottom tap hole | Terminal block：Al2O3-SiC-C bricks | LY-ASG-X | |
| Tapping tube： MgO-C bricks | LY-MG-15SX | |||
|
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Electrode of furnace bottom： | MgO-C bricks | LY-MG-16BSX | |
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Gunning repairing material: | magnesia-dolomite materials | LY-G-HD100 |
Eccentric bottom tapping has been applied as a latest technology. High resistances to corrosion, spalling, oxidation are required for refractories for E.B.T. YOTAI provides the best material for each sections.
| LY-MG-15CX | LY-MG-15SX | LY-ASG-X | LY-S-MH | |||
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Tapping tube | Setting brick | Terminal block | Sealing stamp material | ||
| Chemical Composition(%） | SiO2 | 76 | 76 | 2 | 5 | |
| Al2O3 | 16 | 14 | 70 | 90 | ||
| MgO | 10 | |||||
| SiC | 12 | |||||
| C | ||||||
| Apparent Porosity （%） | 5 | 6 | 7 | |||
| Bulk Density | 2.92 | 2.9 | 2.9 | |||
| Cold Crushing Strength（MPa） | 42 | 40 | 50 | |||
| Grain composition（％） | 1.18≦ | 42 | ||||
| 0.09> | 40 | |||||
MgO-C bricks for Electrode of furnace bottom
| Bland | LY-MG-16BSX | LY-MG-11BX | LY-HPT-B | LY-CFC-18RX | ||
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Use | Electrode of furnace bottom | Back-up | Sleeve of electrode | ||
| Chemical Composition(%） | SiO2 | 2.5 | 9 | |||
| Al2O3 | 86 | |||||
| MgO | 78 | 86 | 94 | |||
| CaO | 1 | |||||
| C | 16 | 11 | ||||
| Apparent Porosity（%） | 3.5 | 3 | 18 | 18 | ||
| Bulk Density | 2.93 | 3.07 | 2.87 | 2.85 | ||
| Cold Crushing Strength（MPa） | 40 | 58 | 70 | 40 | ||