Ladle Linings for Secondary Steelmaking
LWB Refractories supplies the entire range of ladle refractories to satisfy all treatment and ladle furnace operations, including dolomite, magnesia-dolomite, magnesia-carbon, and alumina-magnesia-carbon brick. To complete the package, a wide range of non-aqueous accessory products is also available.
Silicon-Killed Steels
In the manufacture of silicon-killed (low- alloy) steels, maximum ladle life and minimum costs are provided by LWB Refractories’ range of carbon-bonded doloma bricks and non-aqueous doloma or magnesia rammable products.
Doloma ladle linings are the preferred choice of the majority of the world’s silicon-killed steel producers, due to the unique ability of doloma to develop a protective coating on the surface of the lining. This high melting-point coating (> 2,000ºC) results from reactions between the slag and the doloma lining.
A typical ladle lining for the production of silicon-killed rebar steel grades comprises carbon-bonded (2–4 % residual carbon) doloma floor, barrel and slag line. Specific areas are normally reinforced with thicker, denser and higher-strength doloma products, e.g. floor and/or wall impact pads. Ladle linings of this type can achieve more than 100 heats in silicon-killed steel production without any intermediate repairs, except for well-block and plug-block replacement.
For severe operating conditions, such as abnormally long heating and stirring times or EBT tapping, it may be necessary to use magnesia-carbon slag lines or alumina-magnesia- carbon (AMC) floor impact pads.
Aluminium-killed steels
The production of more complex steels, such as high-alloy or aluminium-killed steels,
may require alternative products, such as our magnesia-enriched fired doloma, magnesia-carbon or aluminamagnesia- carbon products.
Steel Treatments | Floor | Barrel | Slag Line |
|---|---|---|---|
Stirring with minimal | Magnesia-carbon | AluMagCarbon may be | Magnesia-carbon |
Auxiliary Products
The success of a metallurgical treatment and the overall performance and economics of any ladle depends to a large extent on the reliability of auxiliary components, such as well blocks, stir plug systems, impact pads and lip blocks. LWB Refractories has developed the technology to manufacture these components from alumina or basic raw materials.
