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Steel ladle

1Slag line

Test item Physical properties Chemical properties
Bulk density /(g/cm3) Apparent porosity/% CCS /MPa MgO /% C /%
Test condition 110×24h 110×24h 110×24h
Low carbon MgO-C brick ≥3.05 ≤8.0 ≥50.0 ≥84.00 ≤8.00
General MgO-C brick ≥2.95 ≤8.0 ≥40.0 ≥78.00 ≥14.0

2Molten zone


Test item
Physical properties Chemical properties
Bulk density
/(g/cm3)
CCS
/MPa
CMOR
/MPa
Permanent linear ratio/% MgO+ Al2O3
/%
Test condition 110×
24h
110×
24h
1550×3h 110×
24h
1550×3h 1550×3h
Corundum-spinel precast block ≥2.90 ≥30.0 ≥50.0 ≥5.0 ≥5.0 -1.0+1.0 ≥92.00
Corundum-spinel castable ≥3.00 ≥40.0 ≥60.0 ≥8.0 ≥8.0 0+1.0 ≥92.00

3Non-impact zone


Test item
Physical properties Chemical properties
Bulk density
/(g/cm3)
CCS
/MPa
CMOR
/MPa
Permanent linear ratio/% MgO+ Al2O3
/%
Test condition 110×
24h
110×
24h
1550×3h 110×
24h
1550×3h 1550
×3h
Corundum-spinel castable ≥3.00 ≥35.0 ≥60.0 ≥5.5 ≥10.0 0+1.8 ≥90.00

4Impact zone


Test item
Physical properties Chemical properties
Bulk density
/(g/cm3)
CCS
/MPa
CMOR
/MPa
Permanent linear ratio/% MgO+ Al2O3
/%
Test condition 110×
24h
110×
24h
1550×3h 110×
24h
1550×3h 1550
×3h
Corundum-spinel precast block ≥2.90 ≥30.0 ≥50.0 ≥5.0 ≥5.0 -1.0+1.0 ≥92.00

5Purging plug


Test item
Physical properties Chemical properties
Bulk density
/(g/cm3)
CCS
/MPa
CMOR
/MPa
MgO+ Al2O3
/%
Cr2O3
/%
Test condition 110× 24h 110×24h 110× 24h
Chrome corundum-spinel
material
≥3.00 ≥90.0 ≥18.0 ≥89.00 ≥2.00

6Well block


Test item
Physical properties Chemical properties
Bulk density/(g/cm3) CCS /MPa CMOR /MPa MgO+ Al2O3 /%
Test condition 110× 24h 110× 24h 110× 24h
Corundum-spinel
material
≥3.02 ≥40.0 ≥6.0 ≥91.00

7Nozzle


Test item
Physical properties Chemical properties
Bulk density /(g/cm3) CCS /MPa CMOR /MPa MgO+ Al2O3 /%
Test condition 110× 24h 110× 24h 110× 24h
Corundum-spinel
material
≥3.00 ≥60.0 ≥8.0 ≥91.00

8Insulated layer


Test item
Physical properties Chemical properties
Bulk density/(g/cm3) Apparent porosity /% CMOR /MPa MgO +SiO2 /%
Test condition 110×24h 110×24h 110×24h
Magsi-board ≤1.48 ≥42.0 ≥2..0 ≥52.00

9Permanent layer


Test item
Physical properties Chemical properties
Bulk density/(g/cm3) CMOR /MPa Permanent linearratio/% Al2O3/%
Test condition 110×24h 110×24h 1550×3h 1550×3h
Corundum-mullite castable ≥2.60 ≥40.0 ≥60.0 -1.0+1.0 ≥60.00