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Nozzle seal

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Steelmaking material

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Product details

During protective casting process of continuous casting，because there is still a gap at the joint of nozzle, so , in order to prevent the impact of oxygen absorption, nitrogen increase and alumina loss on casting quality during continuous casting，the nozzle seal must be used to achieve better casting quality

Name Ordinary fiber Ordinary fiber High alumina fiber Mullite fiber

Alumina fiber

 Zirconia fiber
Item TD-800 STD-1000 HA-1200  MLS-1450 YHL-1500 YHG-1600
properties

Working Temp.(℃)

 800 1000 1200 1450 1500 1600

Bulk density(kg/m3)

 250-500 250-500 250-500 250-400 250-400 250-500

compressive strength(MPa)

 ≥0.2 ≥0.2 ≥0.2 ≥0.15  ≥0.15  ≥0.15 

heating linear shrinkage(%)

 1000℃*6h≤4 1150℃*6h≤4 1400℃*6h≤4 1500℃*6h≤4 1600℃*6h≤4 1700℃*6h≤4

Thermal conductivity

 ≤0.16  800℃ ≤0.2 1000℃  ≤0.19 1000℃ ≤0.2 1000℃ ≤0.22  1200℃ ≤0.19  1300℃

Composition

 Al2O3+SiO2 ≥92  ≥96  ≥98  ≥99  ≥99   
ZrO2+Y2O5            ≥99
K2O+Na2O ≤0.1  ≤0.5  ≤0.2  trace trace trace
Fe2O5       trace trace trace
L.O.I ~5          

 

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