In ladle addition of Calcium Silicide lumps, the recovery of Ca is very low. Due to the lower density (2.5 gm/cc) of CaSi lumps, they float at the surface of the melt and are lost in oxidation and slag. Usually, the recovery of Ca is less than 10%. In contrast, the Cored Wire injection system achieves a recovery of calcium between 15-30% with precise control of composition. In CaSi Cored Wire, CaSi is encapsulated in a steel sheath, allowing it to penetrate deeper into the steel melt when injected.
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