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Monolithic stopper

Al₂O₃ (%) ≥55～70; C (%) ≥15～25
Cold crushing strength (MPa) ≥15～16
Thermal shock resistance (times) ≥5

Application:

Monolithic stopper as one of continuous casting refractories is used for tundish, can play the role of liquid steel flow control and stabilizing continuous casting production.

　　Monolithic stopper is produced by isostatic pressing process, solidified, machining and carbonization, which needs not use metal rod.

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Item	Standard type		Enterprise standard type
	FMZS-A	FMZS-B	FMZS-A	FMZS-B	FMZS-C
	FMZS-A	FMZS-B	Stopper head	Stopper head	Stopper head
Al₂O₃ (%) ≥	60	55	70	70	6
C (%) ≥	25	23	15	15	15
ZrO₂ (%) ≥	-	-	5	5	5
MgO (%) ≥	-	-	-	-	68
Apparent porosity (%) ≥	18	19	17	17	17
Cold crushing strength (MPa) ≥	16	15	16	16	16
Cold rupture strength (MPa) ≥	45	43	5	5	5
Thermal shock resistance (times) ≥	5	5	5	5	5

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Monolithic stopper

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