$Mixed Iron Car, CDQ Refractory Castable$

Mixed Iron Car, CDQ Refractory Castable

Mixed iron furnace engineering overall contracting
Our company has implemented the comprehensive lining process of mixed iron furnace by engineering contracting. The new product microporous corundum composite brick developed by our company is used on the furnace bottom and furnace wall. It has excellent high temperature resistance and erosion resistance and has become the material of the long-life mixed iron furnace lining; the tap hole and the iron receiving hole use the corundum silicon carbide castable and ramming material developed by our company; the furnace top uses the micro-expansion castable developed by our company for overall construction. In recent years, it has been successfully applied to more than 30 mixed iron furnaces of more than 20 steel companies in China, significantly extending the service life of the mixed iron furnace and greatly reducing the operating cost of the mixed iron furnace. Our company has strong technical strength and rich experience in engineering contracting, materials. Professional construction team construction, guidance of furnace drying and repair and maintenance. The following mixed iron furnace engineering overall contracting series products.

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Description

Refractory materials used for masonry of mixed iron furnace body and related parts. Mixed iron furnace is a thermal equipment for steel mills to store molten iron, maintain and homogenize the temperature and composition of molten iron, and is sometimes used to remove impurities in molten iron. The mixing furnace generally uses coal gas as fuel, and the operating temperature is 1500～1550℃.

The lining of the mixing furnace is often subjected to molten iron scouring, slag erosion, temperature changes and dynamic load vibration, and is more easily damaged. In particular, the slag line area, the tapping water arch, the connection between the tapping water and the cylindrical body are weak links. In a furnace campaign, the lining of this area needs to be frequently repaired. If impurities in the molten iron are removed in the mixing furnace, the life of the furnace lining will be seriously affected.

Brand/Item		Iron mouth corundum mullite castable	Corundum mullite castable	Simplified high alumina castable	CN-130	ZH027	ZH010	CL-100	CL-80
Al₂O₃ %		≥75	≥62	≥55	≥35	≥60	≥60
Bulk density g/cm³	110℃ ×24h		≥2.60		≥2.0	≥2.8		≤1.1	≤0.9
	1400℃×3h		≥2.60	≥2.0		≥2.7	≥2.6
Stainless steel fiber content %		≥2	≥2	≥2
Refractoriness ℃		≥1790	≥1790	≥1790
Re-firing line changes % 1400℃×3h		0～+0.5	0～+0.5	±0.5	±1	±0.5	±0.5	1000℃ ±1.0	800℃ ±1.0
Flexural strengthMPa	110℃ ×24h	≥6	≥6	Pressure resistance：≥10	≥4	≥10	≥8	≥1.2	≥0.6
	1200℃ ×3h				1300℃ ≥0.3
	1400℃ ×3h	≥10	≥8			≥12
application		Ladle pouring	Ladle pouring	Permanent layer, coating between working layers

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