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Refractory for cif melting and holding steel

SFR recommends three types of lining materials for melting steel alloys:

1.STEEL-RAM® neutral ramming materialcorundum spinel based on:

◎ Neutral material, low crack propensity;
◎ The hot surface forms a dense sintered layer of high-strength aluminum-magnesium spinel at high temperature;
◎ The sintered layer can effectively prevent the penetration of high temperature metals, manganese oxide and iron oxide;
◎ The unique design of the product allows the backing to maintain a good loose layer and improve the safety of the whole lining.
◎ The main component of the STEEL-RAM® series is alumina, added with a certain proportion of magnesium oxide and then reacts at high temperatures to form magnesium-aluminum spinel which offers excellent volume stability and high resistance to erosion.

2.STEEL-RAM® corundum spinel neutral ramming material contains chrome oxide:

◎ This series is based on fused corundum, added with chromium oxide, the fused corundum, magnesia and chrome oxide, forms high corrosion resistance composite spinel, generates a dense sintered layer under high temperature, and having excellent resistance to molten steel erosion while maintaining a good loose layer on the backing which improves the safety of the lining.

3.MAG-RAM® magnesium oxide based ramming material:

◎ Magnesium oxide based materials have excellent resistance to alkaline slag erosion, they are generally used in severe chemical attack working conditions small coreless furnaces (<1000kg) or in , due to their volume stability are not as good as alumina-based materials.
MAG-RAM® series are mainly composed of magnesium oxide, and a certain proportion of alumina is added in order to form magnesium-aluminum spinel under high temperature. This series of materials not only maintains the high corrosion resistance, but also it can reduce the cracking and spalling risk of the lining compared with ordinary magnesium oxide materials.

SFR-PLUGS porous plug brick is designed to introduce inert gas into the chamber. This permeable brick is made of refractory material, its unique design can prevent penetration of molten metal but allow the venting of gas. SFR-PLUGS bricks help to homogenize the temperature and chemical composition of the molten metal, and also can make the slag float to the molten metal surface.

Advantages of using SFR-PLUGS bricks:

◆ Reduce the gas content in the molten metal;

◆ Reduce the temperature difference in the furnace;

◆ Reduce the slag inclusion in the molten metal;

◆ Improve the service life of the lining.

NO.	AREA	PRODUCT NAME	DESCRIIPTION	Al₂O₃ %	SiO₂ %	MgO %	Cr₂O₃ %	CaO %	Bulk Density g/cm³	Max Temp ℃
1	Cover	ULTRA-CAST 200	Aluminum silicon based castable	45.0	50.0			2.0	2.30	1650
2	Spout	ALU-PAK® 73CR	Alumina based plastic	75.0	9.0		4.0		2.85	1750
		ALU-PAK® 78CR	Alumina based added with chromium	76.0	9.0		8.0		2.95	1750
		ALU-PAK® 882CR	Alumina based added with chromium	82.5	100		2.0		2.90	1750
3	Upper ring	ULTRA-FLO 85	Alumina based low cement castable	84.0	12.0			2.0	2.85	1800
3	Upper ring	ULTRA-FLO 60	Mullite based low cement castable	63.0	30.0			1.5	2.50	1700
4	Coil grout	COIL CRETE 390	Alumina based coil grout(White)	85.0	6.0			5.0	2.60	1760
4	Coil grout	COIL CRETE 790	Tabular alumina based coil grout	950	0.5			4.0	2.70	1800
5	Repair	ALU-PAK® 72CP	Alumina based plastic	75.0	9.0		4.0		2.85	1750
	Repair	ALU-PAK® 73CP	Alumina based plastic	76.4	2.5		11.0		3.15	1550
	Working lining	ALU-PAK® 79CR	Alumina based added with chromium	80.0	12.5		3.5		2.85	1850
6		STEEL-RAM 89	Dry Ramming Mass Based on Corundum-Magnesia	88.0	0.6	11.0			3.15	1810
		STEEL-RAM 91	Dry Ramming Mass Based on Corundum-Magnesia	67.0	0.5	32.0			2.95	1850
		STEEL-RAM 92	Dry Ramming Mass Based on Corundum-Magnesia	84.5	0.2	15.0			3.10	1850
		STEEL-RAM 92C	Dry Ramming Mass Based on Corundum-Magnesia	84.2	0.2	15.3			3.10	1850
		STEEL-RAM 92H	Corundum based dry-ramming with chrome addition	84.7	0.2	14.8			3.10	1810
		STEEL-RAM 80CR	Silica based dry-ramming with chrome addition	80.0		14.5	4.5		3.05	1800
		MAG-RAM 96	Magnesia based dry-ramming mass		0.8	97.0			2.85	1800
		SIL-RAM169CR	Silica based dry-ramming with chrome addition	0.5 0	97.5				2.20	1700
7	Pushing block	ULTRA-FLO 85	Alumina based low cement castable	84.00	12.00			2.0	2.85	1800
8	Sliding layer	SFR-MICA	0.3mm mica paper							900

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E-mail : sales@sfr168.com
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