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High alumina castable for tundish

High alumina castable for tundish

Use Bland
The cover of tundish: high alumina castable LY-CFC-16T
LY-CFC-18T
The castable for the lining :   high alumina castable LY-CFC-TD-80
Bricks for slag dam : magnesia bricks LY-TBX-SY-1
high alumina bricks LY-TBX-A2
Coating materials : magnesia coat LY-TD-C-M7
Block for impact zone: Al2O3-SiC-C block LY-LD-AGX-T2
Nozzle for casting: zirconia nozzle LY-YZN
Well block: high alumina block LY-SK35
Ramming materials: SiO2-Al2O3-SiC ramming materials LY-R-AMC
Repairing materials by trowelling:     high alumina castable LY-C-170M
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
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

LMM YOTAI PRODUCT

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.

Our Clients Give The Best Feedback

UKRAINIAN CUSTOMERS
UKRAINIAN CUSTOMERS
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The MgO-C bricks which used in EAF has a good performance in 75 furnaces, we are so satificated with the using performance of the bricks from LMM YOTAI
	 EGYPT A CUSTOMERS
EGYPT A CUSTOMERS
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We improved the bricks formula and specification accoridng to our experience, the final using performance doubled compared with their previous specification.
	 EGYPT B CUSTOMERS
EGYPT B CUSTOMERS
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In the ladle we have been using high alumina bricks with a performance of 50 heats. After the improved design of LMM YOTAI engineers, we use magnesia carbon bricks instead of high alumina bricks, and the performance reaches 60 furnaces and is still running.
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LMM YOTAI established in 2007. Our production technology comes from Japanese Yotai. As an experienced and international player in the refractories industry. We have succeeded in expanding both the breadth of its product range and the depth of its services. From raw material selection, refractory portofio & optimization, installation & services & recycle of used refractories on site to further reduce client’s Opex & Capex in refractory consumption per ton steel output, meanwhile improve product quality of client.

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