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How to improve the quality of cast iron in medium frequency electric furnace?

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How to improve the quality of cast iron in medium frequency electric furnace?

2019-06-26

XinDa electric furnace

In recent years, due to the requirements of environmental protection, most of the small cupola are replaced by the small medium frequency electric furnace equipment. Because the cupola uses coke and other fuels, metallurgical reaction occurs in the smelting process, while the medium frequency electric furnace smelting is mainly alloy remelting, and the metallurgical reaction is not significant. How to improve the quality of cast iron in medium frequency electric furnace? Below by Weifang Xinda Electric Furnace Equipment Co., Ltd. small edition to introduce to you, for reference only.

According to the smelting characteristics of cast iron in medium frequency electric furnace, the foundry workers are required to renew their ideas in many aspects, such as composition selection of cast iron, burden ratio, scrap consumption, inoculation process, carburization and decarburization, sulfur and desulfurization, spheroidization process, vermiculation process, temperature control, pouring process, etc., and take practical measures to ensure and improve product quality.

In the foundry industry, it is often said that the composition of the casting materials determines the structure and the properties of the structure. In practice, we found that many cast irons have different mechanical properties in the same composition. The quality of molten iron is not only related to its composition, but also closely related to the charge ratio (pig iron amount, scrap amount, return material amount, alloy amount), melting and discharging temperature, inoculation process, etc. The so-called synthetic cast iron refers to the cast iron material made by the way of carburizing and synthesizing with more than 50% scrap steel in the batching. Because it needs a higher melting temperature, it should be melted in the medium frequency electric furnace. At present, synthetic cast iron mainly includes synthetic gray iron and nodular iron.

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