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Products we offer

magnesia carbon bricks refractory institute


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
Sleeve of electrode: precast block LY-CFC-18RX
Side wall bricks: MgO-C bricks LY-S-NSA-110XMA
Permanent bricks: magnesia bricks LY-HPT-B 
Stamping materials(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 
Electrode of furnace bottom:   MgO-C bricks  LY-MG-16BSX 
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
Side wall bricks:  MgO-C bricks LY-S-NSA-110XMA
Permanent bricks: magnesia bricks LY-HPT-B 
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 
Electrode of furnace bottom:    MgO-C bricks  LY-MG-16BSX 
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
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
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

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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