High Temperature Insulation Solution of Rolling Hearth Furnace for Continuous Casting and Rolling
Furnace profile
Continuous casting process of thin slab is introduced in recent years, a relatively compact and efficient new furnace technology. It is the continuous casting machine casting 40-70mm thick slab by insulation or local heating and then sent to the strip hot rolling mill, directly rolled into 1.0-2.3mm thick strip.
The normal furnace temperature of CSP line is 1220 degrees, the fuel mainly uses gas and natural gas, the furnace atmosphere is weak oxidation. Because of the above operating environment, so the introduction of the current domestic and international CSP line furnace technology, the all original material of its furnace lining designed for refractory ceramic fiber materials.
Continuous casting and rolling roll-type soaking furnace insulation- insulation structure of ceramic fiber lining:
Continuous casting and rolling roll-type soaking furnace insulation- burner nozzle parts insulation: light, high efficiency refractory ceramic fiber.
Continuous casting and rolling roller bottom heat furnace insulation, furnace lid, furnace wall insulation.
1. Soaking furnace insulation material selection: it uses refractory ceramic fiber blanket and ceramic fiber module combined into lining structure.
2. Insulation thickness: the total thickness between 280-310mm.
3. Lining of the anchor material: use S310 material
4. Module anchorage structure: butterfly anchorage.
Technical advantages
Butterfly anchorage structure
This type of structural anchor consists of a butterfly-shaped bracket, welded with two heat-resistant steel pipes, on both sides of the steel pipe are interspersed with a compression of the balance of ceramic fiber folding felt. The structure of the aluminum silicate fiber module, not only it’s the anchor structure is solid, but also to ensure that the module is installed, after remove the protective film, the compressed folding blanket can produce a full rebound, expansion is not limited by the anchorage structure to ensure that lining of the seamless requirements, and because the ceramic fiber module and the backing layer is only a layer of steel between the joints, to achieve close fit between the backing layer and ensure that the lining thickness uniform, smooth and beautiful.
Connecting beam parts:
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Insulation material selection: it uses inverted T-type light insulation castable preform
Insulation thickness: total thickness of 355mm
Lining of the anchor material: S.S. 310 material
Prefabricated block anchorage structure: Y-type anchorage
Prefabricated block arrangement: use upper and lower labyrinth lap way
When Construction, the use of nuts have been pre-buried bolts prefabricated block fixed on the roof steel frame.
Technical advantages
1. Maze connection and good seal: inverted T-type castable prefabricated block structure, the lid at both ends of the lining to the castable wall structure, so that the connection site to form a labyrinth structure, to achieve a good sealing effect.
2. Prefabricated, simple construction: the site with castable preforming, the construction of the prefabricated block only fixed screw nuts, gasket fixed to the top of the steel frame structure, the installation is convenient, can greatly reduce the castable field pouring construction difficulties.
Furnace seal structure:
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Roller insulation seals：
Using zirconium-containing ceramic fiber shaped HLGX-555, the roller seal block made into two semi-circular hole of the opposite sex block, and then respectively clasped in the furnace roll.
Technical advantages:
Semi-circular buckle and easy to replace: the sealing structure can not only ensure that the excellent sealing performance of furnace roller parts, reduce heat loss, soft seal to ensure a longer life of the furnace roll, and each furnace roller seal block is an independent individual, so that the replacement of the furnace roll or sealing material is more convenient.
Billet entrance door - fire curtain：
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According to the metallurgical large-scale continuous operation furnace (roller-type furnace, step-type furnace, etc.), Rosewool Insulation Refractory Co., Ltd introduced a simple and efficient door structure - fire curtain, the structure is no cumbersome door structure, install and use conveniently, without assemblage and disassemblage, the lifting, steel can be free passage, and can effectively block the radiation heat transfer, corrosion resistance, high temperature and physical and chemical properties of a series of advantages, as a continuous operation furnace door, simple, economical and practical Is a very valuable market value of the new fire-resistant insulation structure applications, (detailed structure see continuous heating furnace, heat treatment furnace).
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