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Refractory for cif melting and holding iron

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Refractory for cif melting and holding iron

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Recommend silica based material as working lining：

Transformation of the quartz crystal during the heating process causes a rapid change in volume, which makes silica lining tighter and obtains a well-sintered working layer.
The transition process of quartz is irreversible, but the volume of the lining after sintering is relatively stable even the temperature changes. Familiar with the crystallographic properties of quartz is beneficial for obtaining excellent lining service life and formulating sintering and cold-start technology.

Quartz sand crystal form transformation diagram

In order to improve the service life of the lining, SFR recommends to use fused silica lining materials.
Mainly utilize the following characteristics of fused quartz:

◆ Nearly zero thermal expansion rate.

◆ Excellent thermal stability

◆ High purity (high SiO2 content, low content of Fe, K, Na, Ti etc.)

◆ Stable chemical properties.

Special machinery control production, stable particle size distribution

Appearance: colorless transparent block, granule or white powder

Products for CIF melting and holding iron：

◎ SIL-RAM® 161 is a normal quartz-based material, and the binder B2O3 (0.6%, 0.8%, 1.0%, 1.2% etc.) can be selected according to the tapping temperature and other melting parameters;
◎ SIL-RAM® 162/SIL-RAM® 163/SIL-RAM® 167 / SIL-RAM® 263 /SIL-RAM® 267are acid lining material containing fused quartz. They have excellent volume stability and anti-erosion ability. And can be applied as the entire lining or used with normal quartz materials. Fused quartz material can improve excessive erosion of the lower lining part, and also can reduce the crack & peel off risks of the upper part.
◎ SIL-RAM® 165CR / SIL-RAM® 265CRis an acid lining material contains both fused quartz and chrome oxide. It has excellent volume stability, and chrome oxide improves the anti-erosion ability.
◎ SIL-RAM® 169CR is an acid lining material added with chromium oxide. The addition of chromium oxide improves the corrosion resistance of the material. It is usually used in the coreless induction furnace melting iron at high temperature or carbon steel.

NO.	AREA	PRODUCT NAME	DESCRIIPTION	Al₂O₃ %	SiO₂ %	Cr₂O₃ %	CaO %	Bulk Density g/cm³	Max Temp ℃
1	Cover	ULTRA-CAST 200	Aluminum silicon based castble	45.0	50.0		2.0	2.30	1650
2	Spout	ALU-PAK® 55	Aluminum silicon based plastic	61.0	32.0			2.55	1680
		ALU-PAK® 67	Aluminum silicon based plastic	68.0	26.0			2.65	1700
		ALU-PAK® 90H	Alumina based plastic	89.0	5.0			2.95	1700
3	Upper ring	ULTRA-FLO 85	Low cement castable	84.0	12.0		2.0	2.85	1800
3	Upper ring	ULTRA-FLO 60	Low cement castable	63.0	30.0		1.5	2.50	1700
4	Coil grout	COIL CRETE 390	Coil material(white)	85.0	6.0		5.0	2.60	1760
4	Coil grout	COIL CRETE 590	Coil material(red)	91.0	2.0		5.0	2.80	1760
5	Repair	ALU-SEAL 68	Aluminum silicon based plaster	68.0	26.0			2.65	1650
5	Repair	ALU-PAK® 73CR	Plastic with chromiun	75.0	9.0	4.0		2.85	1750
6	Working lining	SIL-RAM 161	Natural silica	0.5	98.2			2.15	1650
		SIL-RAM 162	Fused silica	0.5	98.2			1.98	1650
		SIL-RAM 163	Fused silica	0.5	98.2			1.90	1650
		SIL-RAM 167	Fused silica	0.5	98.2			1.98	1700
		SIL-RAM 165CR	Fused Silica Based Added With Chromium	0.5	98.2	1.0		2.15	1700
		SIL-RAM 169CR	Silica Based Added With Chromium	0.5	97.5	1.0		2.20	1700
		SIL-RAM 263	Silca Based	0.5	99.2			1.89	1650
		SIL-RAM 265CR	Fused Silca Based added with Chromium	0.5	97.5	1.0		2.10	1700
		SIL-RAM 267	Silca Based	0.3	99.2			2.02	1650
7	Pushing block	ULTRA-FLO 85	Low cement castable	84.00	12.00		2.0	2.85	1750
8	Sliding layer	SFR-MICA	00.3mm Mica paper						900