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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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Cement

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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.