Products Parameters
| Normal Grade | Composition |
| FeSi75 | Si:75%Min C:0.2%Max Al:2.0%Max P:0.03%Max S:0.03%Max |
| FeSi72 | Si:72%Min C:0.2%Max Al:2.0%Max P:0.03%Max S:0.03%Max |
| FeSi70 | Si:70%Min C:0.2%Max Al:2.0%Max P:0.03%Max S:0.03%Max |
| FeSi65 | Si:65%Min C:0.2%Max Al:2.0%Max P:0.04%Max S:0.03%Max |
| Low Al Grade 75%FeSi | Si:75% C:0.2% AL:0.2% P:0.035% S:0.02% |
Products Description
Ferrosilicon 65 is an iron alloy composed of iron and silicon, usually with a silicon content of 63-68%, and the rest mainly iron and a small amount of impurity elements. The alloy is silver-gray, with a density of about 3.5g/cm³ and a melting point between 1200-1300℃. In metallurgical applications, the particle size distribution of ferrosilicon 65 has a significant impact on the use effect, usually requiring 10-50mm blocks or 1-10mm granules.
The birth of ferrosilicon 65 can be traced back to the Industrial Revolution in the late 19th century. With the invention of the Bessemer converter steelmaking process, metallurgists discovered that silicon can effectively control the oxygen content in molten steel. In 1883, French chemists systematically studied the production process of ferrosilicon alloys for the first time, laying the foundation for the modern ferrosilicon industry. In the early 20th century, with the development of electric arc furnace smelting technology, ferrosilicon 65 began to be produced on a large scale. Especially during World War II, the military industry's demand for high-quality steel surged, which promoted the rapid progress of ferrosilicon production technology. Countries rich in hydropower resources such as Norway and Russia took the lead in establishing a complete ferrosilicon industry system, while China gradually mastered the relevant technology in the late 1950s and has now become the world's largest ferrosilicon producer.
The application areas of ferrosilicon 65 are far beyond ordinary people's imagination. In carbon steel production, it can improve the ductility of steel as a deoxidizer; in stainless steel smelting, it can enhance the product's antioxidant properties; in the cast iron industry, ferrosilicon 65 can promote graphite precipitation and improve casting fluidity. It is particularly worth mentioning that with the rise of new energy vehicles, the demand for electrical steel has exploded, and ferrosilicon 65 is the key additive for the production of high magnetic induction oriented silicon steel. Experiments at a steel research institute show that adding an appropriate amount of ferrosilicon 65 can reduce the iron loss of electrical steel by 15% and significantly improve energy efficiency. In addition, ferrosilicon 65 also plays an important role in magnesium smelting and the chemical industry, truly reflecting the industrial value of "small materials with big uses".
Looking ahead, the ferrosilicon 65 industry is facing a historic opportunity for green transformation. With the advancement of the "dual carbon" goal, traditional high-energy-consuming production methods are in urgent need of change. Leading companies in the industry have begun to explore innovative paths such as replacing coke with biomass charcoal and using photovoltaic power generation to power furnaces.
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