Steelmaking Refractory ProductsContinuous casting

Monoblock Ladle Stopper

Alumina–carbon monoblock stopper with anti-scouring and anti-erosion behaviour, stable flow control during casting and tight closing after casting, with seven stopper-head grades.

Grades / types: 9 grades, SB45 to MA65
Specification tables: 2: Stopper body; Stopper head

Product overview

Monoblock ladle stopper resists scouring and erosion, gives stable flow control during the casting process and closes tightly once casting is complete.

Body grades SB45 and SB40 and stopper-head grades in magnesia–carbon, alumina–carbon and alumina–magnesia–carbon materials are specified below.

Key characteristics

Anti-scouring
Anti-erosion
Stable flow control during casting
Tight closing after casting
Seven stopper-head grades in three material systems

Technical data

Stopper body
Property	Unit	SB45	SB40
Al₂O₃	%	≥45	≥40
C	%	≥20	≥25
Cold Modulus of Rupture (CMOR)	MPa	≥5.5	≥5.5
Apparent Porosity	%	≤19	≤19
Bulk Density	g/cm³	≥2.36	≥2.2

Stopper head
Property	Unit	MC65	MC60	AC70	AC65	AC60	MA70	MA65
Al₂O₃	%	—	—	≥70	≥65	≥60	—	—
MgO	%	≥65	≥60	—	—	—	—	—
Al₂O₃+MgO	%	—	—	—	—	—	≥70	≥65
C	%	≥9	≥12	≥9	≥12	≥15	≥8	≥10
Bulk Density	g/cm³	≥2.45	≥2.4	≥2.65	≥2.6	≥2.55	≥2.6	≥2.45
Apparent Porosity	%	≤19	≤19	≤19	≤19	≤19	≤19	≤19