Calcium from calcium-silicon cored wire is a commonly used core powder material. Although it is a strong deoxidiser, it has a relatively low specific gravity and relatively low melting point, and is prone to bubble formation at high temperatures. Therefore, if calcium metal is used alone as the core powder layer of cored wire, the cored wire will start to burn as soon as it is fed into the refining furnace the refining furnace, it will start to burn. If the cored wire does not reach below the middle of the molten steel, the desired purification effect cannot be achieved.
Even if measures such as using a high-temperature-resistant sheath material and rapid insertion are used, it is impossible to completely prevent it from burning. At the same time, the combustion of the core powder layer under these working conditions will not achieve the desired purification effect, and it will also cause a waste of the more expensive calcium resource.
