​Basic Introduction Of Ferrosilicon

As a deoxidizer and alloying element for steelmaking, aluminum plays a very important role. For many years, the method of directly adding aluminum cake or aluminum ingot to the steelmaking furnace or ladle molten steel has been used in steelmaking. The primary pure aluminum is used, which is not only expensive, but also oxidized by oxygen in the air and slag up to 70-90%, resulting in excessive aluminum burning loss and large fluctuations in the amount of residual aluminum in the molten steel. Much work has been done around improving aluminum yield and accurate residual aluminum control. As a typical representative of this aspect, the wire feeding method has been widely used in the fine-tuning and supplementary deoxidation of the residual aluminum in the molten steel in the subsequent steps of the steelmaking process. contact with unstable components. The deoxidation of aluminum-iron and other containing aluminum alloys has also been proved to be a very effective method, not only the consumption of aluminum is greatly reduced, but also the amount of aluminum added can be controlled more accurately, and the content of non-metallic inclusions is also reduced. As a new composite deoxidizer in the past two years, iron has not only achieved obvious aluminum saving effect (40-50 aluminum) under the premise of ensuring the same final oxygen content level and mechanical properties as pure aluminum deoxidized steel. %), and the pouring performance of some molten steel is improved, and the phenomenon of nozzle nodules is greatly reduced. In order to apply this technology as soon as possible, the Ministry of Metallurgy formally issued a document in 1989, proposing that "Since 1990, all key enterprises and local enterprises in the country should promote the application of ferrosilicon as a deoxidizer" to replace the original primary aluminum, and promulgated at the same time. The provisional supply standard has been established, and a gratifying step has been taken in the deoxidation and alloying of molten steel using ferrosilicon.