LF-VD Furnace Refractory Material

LF-VD Furnace Refractory Material

LV-VD furnace is steel liquid refinery equipment, which’s working condition is very harsh, should endure all kinds of high temperature corrosion, chemical corrosion, mechanical stress and thermal stress. So high quality refractory products should be adopted in according parts of LF-VD furnaces.
Magnesia carbon bricks are mainly used at furnace bottom and working lining. Corundum precast block which has high mechanical strength is mainly used at furnace bottom impacting zone. Magnesia chrome ramming mass is mainly used at furnace wall corner. Magnesia chrome mortar can be used for the masonry of magnesia chrome bricks.

ladle furnace

LF-VD Furnace Refractory Material Physiochemical Index

NameMagnesia carbon brickCorundum precast  blockMagnesia mortarMagnesia chrome ramming massMagnesia carbon brick
ApplicationBottom, wall working liningBottom impacting zoneSteel ladle working liningWall cornerBelow slag line, free surface working lining
MgO %92.5/965292.5
CaO %2.5/2.2Cr2O3,192.5
Fe2O3 %4/0.3194
SiO2 %//10.50.6
Al2O3 %≥/97/6/
F.C % ≥5///10
Apparent porosity %≤7///<7
Bulk density g/cm3 ≥3.072.98//2.98
Compression strength Mpa>.4080/25(110℃)>30

 

NameMagnesia carbon brickMagnesia chrome brickMagnesia chrome mortarMagnesia castable (ramming mass)Chrome silica ladle filler sand
ApplicationSlag line working liningSlag line permanent liningMagnesia chrome brickLadle nozzleTapping hole
MgO %966052916~12
CaO %2.3Cr2O3, 18Cr2O3, 192.0Cr2O3 >30
Fe2O3 %0.314195.820
SiO2 %1.20.50.50.530
Al2O3 %≥/660.35~10
F.C % ≥10////
Apparent porosity %≤7<15///
Bulk density g/cm3 ≥3.003.26///
Compression strength Mpa>30>30/30(110℃)/
NameCorundum blockMagnesia blockCorundum brickMagnesia brickCorundum mullite brick
ApplicationPurging plug, sleeve brick, pocket blockPurging plug, sleeve brick, pocket blockPurging plug, sleeve brick, pocket blockDispersive type Purging plugPurging plug core plate
MgO %/97/97/
CaO %1.81.72.41.9/
Fe2O3 %/////
SiO2 %0.10.60.10.59
Al2O3 %≥88/97/90
F.C % ≥/////
Apparent porosity %/<25/26/
Bulk density g/cm3 ≥3.222.753.002.602.95
Compression strength Mpa>60>30>50>30>60
Thermal conductivity w.(m.K)-1(1000℃)/3.02.83.0/
NameAlumina magnesia castableAlumina chrome castableCorundum castableMagnesia chrome castableAlumina chrome chamotte
ApplicationPurging brick surroundingPurging brick surroundingPurging brick surroundingLower Dispersive purging brickPurging brick
MgO %8//77/
CaO %11.82.4//
Cr2O3 %/10/122.0
SiO2 %0.1/0.1/7
Al2O3 %≥888897/84
F.C % ≥/////
Apparent porosity %///26/
Bulk density g/cm3 ≥3.003.223.002.60/
Compression strength Mpa>60>60>50>30/
Rupture strength Mpa(1400℃)12158//

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