JSC "Borovichi Refractories Plant" - "Corporate website" - Locking refractories for steel ladle casting

Main Data

See also

Locking refractories for steel ladle casting

Locking refractories are used for steel ladle casting

Technical characteristics

	Rate for grade
	Stoppers
	ShST-32	ShST-35	MLST-63	МКSТ-73	МКSТТ-73	MKBST-75
	GOST R 53066-2008
Mass fraction, %: Al₂O₃, minimum Fe₂O₃, maximum	32 -	35 -	63 1,3	73 1,1	73 1,5	75 2,2
Refractoriness, °С, minimum	1690	1710	-	-	-	-
Open porosity, %, within limits of: - semi-dry pressing - plastic formation	15-26 19-26		16-21 -	16-20 -	maximum 24 -	17-22 -
Residual variation of dimensions when heating,%, maximum at: 1350 °C 1400 °C	0,3 -		- 0,1	- 0,1	- 0,3	- 0,1
Thermal shock resistance, heat cycles, minimum	1		2	2	3	2

	Rate for grade
	Well block
	ShSG-32	MLSG-62
	GOST R 53066-2008
Mass fraction, %: Al₂O₃, minimum Fe₂O₃, maximum	32 -	over 62 1,5
Refractoriness, °С, minimum	1690	-
Open porosity, %, maximum	23	24
Compressive strength, N/mm², minimum	15	25
Temperature of initial softening, °С, minimum	-	1450
Residual variations of dimensions when heating at 1500°С, maximum	-	0,4

	Rate for grade
	Stoppers
	ShSP-32	ShSP-34	MKSP-72
	GOST R 53066-2008
Mass fraction, %: Al₂O₃, minimum	32	34	over 72
Refractoriness, °С, minimum	1690	1710	-
Open porosity, %, within limits of: - semi-dry pressing - plastic formation	15-20 18-23	15-20 18-22	16-21 -
Temperature of initial softening, °С, minimum: - semi-dry pressing - plastic formation	1320 1350		- -
Thermal shock resistance, heat cycles, minimum	1	3	1

	Rate for grade
	Nozzle
	ShSS-32	ShSS-34	MLSS-62
	GOST R 53066-2008
Mass fraction, %: Al₂O₃, minimum Fe₂O₃, maximum	32 -	34 -	over 62 1,5
Refractoriness, °С, minimum	1690	1710	-
Open porosity, %, maximum	22	20	24
Temperature of initial softening, °С, minimum	1350		-

Limit deviations of bricks dimensions (mm)

Dimensions	Limit deviations of bricks dimensions
	Tubes		Stoppers		Nozzles		Inserts	Well block
	mm	%	mm	%	mm	%	mm	mm	%
Diameter of brick, mm:
- semi-dry formation:
up to 50 inc.	±1	-	±1	-	±1	-	±1	-	-
over 50 up to 100 inc.	±2	-	±2	-	±2	-	±1	-	-
over 100	-	±2	-	±2	±2	-		±2	-
- plastic formation:
up to 50 inc.	±2	-	±1	-	±1	-	±1	-	-
over 50 up to 100 inc.	±2	-	±2	-	±2	-	±1	-	-
over 100	-	±2	-	±2	-	±2	-	-	±2
Diameter of bead and groove	±1	-	±1	-	-	-	-	-	-
Height of bead (h)	±1	-	±1	-	-	-	-	-	-
Height of groove (h1)	±1	-	-	-	±1	-	-	±1	-
Height of well for insert (h) of nozzle numbers 25-30, 33, 34	-	-	-	-	±2	-	-	-	-

Form and dimensions

Stopper tube

Number of bricks	Groups of brick	Dimensions, mm									In combination with stopper
		H	h	h₁	D	D₁	D₂	d	d₁	d₂
1	fire-clay, mullite-cilica, mullite, mullite-corundum	300	10	13	100	67	63	40	72	67	9
2		300	14	17	125	81	75	48	86	79	10
3		300	18	21	140	94	88	54	100	93	11
4		300	18	21	160	106	100	60	111	104	12
5		300	23	26	180	125	115	64	129	119	13
6		300	23	34	180	125	115	64	129	115	13
7		270	23	26	200	125	115	64	129	119	14
8		270	23	34	200	125	115	64	129	115	14

Stopper

Number of brick	Dimensions, mm
	H	h	D	D₁	D₂	d₁	d₂	d₃	d₄	l	S	r	r₁	R	R₁	e	k
9	125	10	100	67	63	34	24	32	22	72	12	2.8	2.6	47.5	27	97	31
10	140	14	125	81	75	40	30	38	28	91	12	2.8	2.6	57.5	45	126	51
11	160	18	140	94	88	48	36	46	34	100	16	3.7	3.6	65.7	54	140	60
12	180	18	160	106	100	55	43	52	40	115	16	3.7	3.6	77.5	62	160	69
13	200	23	180	125	115	55	43	52	40	120	16	3.7	3.6	77.5	62	166	69
14	200	23	200	125	115	55	43	52	40	120	16	3.7	3.6	77.5	62	166	69

Nozzles

Number of brick	Groups of brick	Dimensions, mm								In combination with stopper №
		H	D	D₁	d	d₁	r	e	k
15	fire-clay	140	140	112	24		35	34	60	9
					26
					28
					30
					32	50
					35
					40
					45
					50	52
16	fire-clay	240	160	120	20	65	35	34	67	11
					22
					24
					26
					28
					30
					35
					40
					45
					50
					55
					60
					70	72
17	fire-clay	300	160	127	26	60	35	34	65	10, 11
					30
					35
					40
					45
					50
					55
					60	62
					70	52
18	fire-clay	360	160	120	30	65	40	37	72	11
					35
					40
					45
					50
					55
					60	72
19	fire-clay	140	140	112	30	58	35	34	64	10
					35
					40
					45
					50
					60	62
20	fire-clay	300	160	127	30	68	35	34	69	10, 11
					35
					40
					45
					50
					55
					60
					65
					70	72
21	fire-clay	360	160	120	30	68	55	51	88	12, 13, 14
					35
					40
					45
					50
					55
					60
					65
					70	52
22	fire-clay	240	180	140	30	71	50	46	85	11
					35
					40
					45
					50
					55
					60
					65
					70	72
23	fire-clay	370	210	146	30	67	90	86	120	12, 13, 14
					35
					40
					45
					50
					55
					60
					70	82	65	64	105
					80	82	65	64	105
					90	102	54	54	105
					100	102	54	54	105

Number of brick	Groups of brick	Dimensions, mm											In combination with stopper
		H	H₁	D	D₁	D₂	D₃	d	d₁	r	e	k
24	fire-clay	370	320	210	146	152	180	30	67	90	86	120	12, 13, 14
								35
								40
								45
								50
								55
								60
								70	82	65	4	105
								80	82	65	4	105
								90	102	54	54	105
								100	102	54	54	105

Number of brick	Groups of brick	Dimensions, mm												In combination
		H	H₁	h	h₁	D	D₁	D₂	D₃	d	d₁	d₂	d₃	with insert №	with stopper №
33 34	fire-clay	280 360	170 250	65	8	140	110	120	164 175	30	98	102	126	10, 11	36 35
										35
										40
										45
										50
										55
										60

Number of brick	Groups of brick	Dimensions, mm									In combination
		H	h	h₁	D	D₁	d	d₁	d₂	d₃	with insert №	with stopper №
25	fire-clay	200	60	8	125	95	30 35 40	75	80	106	35	9
26	fire-clay	140	60	8	140	112	30 35 40	75	80	106	35	9
27 28	fire-clay	240 300	65	12	160	120 127	25 30 35 40 45 50 55 60	98	102	140	36	10, 11
29 30	fire-clay	360 240	65	12	160 180	120 140	30 35 40 45 50 55 60	98	102	140	36	10, 11

Well block

Number of brick	Groups of brick	Dimensions, mm						In combination with nozzles №
		B	H	h₁	d	d₁	d₂
37	fire-clay	250	100	30	190	129	119	25
38		250	120	30	190	144	126	15, 19, 26
39		250	120	30	225	184	169	22, 30
40		300	150	40	240	184	166	22, 30
41		300	150	40	240	164	146	16, 27
42		300	150	40	240	164	152	17, 18, 20, 21, 28, 29
43		360	150	60	300	215	200	23
44		360	150	60	300	215	206	24
49		300	150	40	220	144	159	33, 34