Si-ca alloy, which is an ideal deoxidizer and desulfurizer, is composed of silicon, calcium and iron. It is widely used in the production of high quality steel, mild steel, stainless steel and nickel-base alloy, titanium-based alloys. It is also suitable for the training workshop as the heating agent, and the additive in the producing of ductile casting iron, and inoculant of casting iron. From about 1907 , we began to use electro-silicothbrmic process in the production of Si-ca alloy.
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