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Magnesia carbon products and alumina magnesia carbon products

Non calcined magnesia carbon products are used for lining of electric arc steel furnaces (GB 28468-90). Magnesia carbon products based on sintered magnesia and fused magnesia, alumina magnesia carbon products and magnesia spinel carbon products are used for ladle lining (GB 53933-2010). Magnesia carbon products are used for lining in steelmaking converters.

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Description

Index item	Specification standard
Index item	PUBD-73	PUPBD-72	PUBD-70
GB code	28468-90
Mass fraction,%
MgO, ＞	73	72	70
loss on ignition, %，	7-18	10-25	7-18
Compressive strength，N/мм², ＞	16	25	10
Apparent porosity, %, ＜	12	8	20
Usage	Non calcined magnesia carbon products are used for lining of electric arc steel furnaces.

Index item	Specification standard
Index item	PUSK-60	PUSK-89	PUSK-91-7	PUSK-91-9	PUSK-93	PUSPK-91
GB code	Р 53933-2010
Mass fraction,%
MgO, ＞	60	89	91	91	93	91
Al₂O₃, Range	14-16	-	-	-	-	-
SiO₂, ＜	-	2,0	-	-	-	-
С, Range	6-8	-	7-10	9-11	-	7-10
С, ＞	-	8	-	-	7	-
Apparent porosity，%，＜ Before coking	8	8	8	6	7	8
Compressive strength，N/мм², ＞ Before coking	40	40	30	35	35	30
Usage	Magnesia carbon products based on sintered magnesia are used for ladle lining.

Index item	Specification standard
Index item	PUPK-90-2	PUPK-90-7	PUPK-90-9	PUPK-90-13	PUPK-92	PUPK-93	PUPK-95
GB code	Р 53933-2010
Mass fraction,%
MgO, ＞	90	90	90	90	92	93	95
SiO₂, ＜	-	-	-	-	1,9	1,6	-
С, Range	2-5	7-10	9-14	13-17	7-12	＞ 8	5-13
Apparent porosity，%，＜ Before coking	6	8	6	8	6	5	8
Compressive strength，N/мм², ＞ Before coking	35	35	30	30	35	35	40
Usage	Magnesia carbon products based on fused magnesia are used for ladle lining.

Index item	Specification standard
Index item	APUK-60	APUK-65	APUK-68	APUK-70	APUK-75-8	APUK-75-9	APUK-80	PSHPUK-45	PSHPUK-50
GB code	Р 53933-2010
Mass fraction,%
Al₂O₃, ＞	Св. 60	65	68	70	75	75	80	20	20
MgO, Range	15-25	-	-	5-11	8-10	-	5-1	-	-
MgO, ＞	-	15	10	-	-	10	-	45	50
С, Range	-	-	-	-	6-8	-	5-11	-	-
С, ＞	6	7	5	5	-	5	-	8	8
Apparent porosity，%，＜ Before coking	9	9	9	9	8	9	9	9	8
Compressive strength，N/мм², ＞ Before coking	40	40	40	40	50	45	35	30	40
Usage	Alumina magnesia carbon products and magnesia spinel carbon products are used for ladle lining.

Index item	Specification standard
Index item	PUKR80	PUKR78	PUKRР76	PUKR74	PUKR72
Mass fraction,%
MgO, ＞	80	78	76	74	72
С, ＞	10	10	14	14	18
Volume density，g/см³, ＜	2,95	2,90	2,95	2,90	2,90
Compressive strength，N/мм²,＞	40	35	40	35	40
Bending strength(1400℃×0.5h),N/мм², ＞	6	6	12	8	10
Apparent porosity，%，＜	4,0	5,0	4,0	5,0	3,0
Usage	Used for lining in steelmaking converters