Silicon Calcium With Good Quality

The calcium content of silicon calcium alloy is generally between 22% and 35%, and the silicon content is between 60% and 65%. According to the YB 525-65 standard, the calcium content of silicon calcium alloy is not less than 31%, 28% and 24% respectively. Silicon calcium alloy has a strong reducing ability and is an ideal composite deoxidizer and desulfurizer. • The production of silicon calcium alloy usually adopts the method of carbon reduction of calcium oxide (lime) and silica. For silicon calcium alloy with lower calcium content, the silicon thermal method is used.

Calcium and silicon in silicon-calcium alloy have strong affinity with oxygen, especially calcium, which has strong affinity not only with oxygen, but also with sulfur and nitrogen. Therefore, silicon-calcium alloy is an ideal composite deoxidizer. In the steelmaking process, silicon-calcium alloy can react with oxides in molten steel to generate calcium oxide and participate in the formation of steel oxide complexes, thereby reducing the oxygen content in molten steel and improving the purity and strength of steel. Silicon and calcium in silicon-calcium alloy have strong reducing properties and can react with sulfides in molten steel to generate volatile gas hydrogen sulfide (H2S), so that the sulfur in molten steel is reduced and volatilized, achieving the purpose of desulfurization and improving the quality of steel. Silicon and calcium in silicon-calcium alloy are both reducing agents and alloying elements. Adding silicon-calcium alloy to molten steel can adjust the non-metal content in molten steel and cause changes in alloying elements in steel. For example, silicon-calcium alloy with a high silicon content can be used to increase the silicon content and the content of alloying element silicon, thereby improving the performance of steel and adapting to different application requirements.

Silicon calcium alloy can improve the physical and chemical properties of steel, and is beneficial to improve the morphology of oxide and sulfide inclusions in finished steel and castings. The addition of silicon calcium alloy can improve the plasticity, impact toughness and fluidity of steel, thereby improving the overall performance of steel. Silicon calcium alloy can also be used as an inoculant for cast iron, which can improve the strength and hardness of cast iron by refining the grains. Silicon calcium alloy is also suitable as a warming agent in converter steelmaking workshop, which helps to improve steelmaking efficiency.

In summary, silicon-calcium alloy plays many important roles in the metallurgical field, such as deoxidation, desulfurization, alloy adjustment, and improvement of steel properties. It is an indispensable additive in the steel smelting process.

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