High Quality Monoblock Stoppers

Monoblock Stoppers

This product has the characteristics of antioxidation, erosion resistance and high strength, using togerther with nozzles, suitable for the needs of several heats and long time for the con-casting ofslab, round billet, rectangle billent, and spectal steel have the function of preventing the nozzles from block by blowing argon to the tundish nozzles.
Al2O3 (%) > 60 A.P. (%) < 18
C + SiC (%) > 25 B.D. (g/cm3) > 2.65
ZrO2 (%) C.C.S (Mpa) > 20
Si O2 (%) M.O.R. at romm
Temp. (Mpa) > 6.0
Refractoriness (�C) > 1770 Resistance to thermal shock
(Times) > 5

Ladle Shrouds

Long nozzles are used to shroud the casing stream between ladle and tundish,having the function of reducing reoxidation and nitrogen absorption from the ambient air. The products are shapd by coldisostatic press, made of corundum and graphite, with high thermal shock resistance, superior erosion resistance.
Item Al2O3-C (Body) Permeable Layer Fused Slilica
Non heated Heated
Al2O3 (%) > 40 > 45 90
C + SiC (%) > 28 > 28
ZrO2 (%)
Si O2 (%) 15-25 15-25 > 99
Refractoriness (°C) > 1770 > 1770
A.P. (%) < 20 < 20 < 19
B.D. (g/cm3) > 2.20 > 2.20 > 1.82
C.C.S (Mpa) > 18 > 18 > 40
M.O.R. at room
Temp. (Mpa) > 4.5 > 5.0
Permeability 198
Resistance to thermal shock (Times) > 10 > 5 > 10