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