The invention relates to a method of casting molten iron with induction melting electric furnace and scrap iron chips. The waste iron chips are put into the  melting furnace, at the same time, the carburizing agent is added in the induction melting furnace, and the ferrosilicon and ferromanganese are added in the medium frequency electric furnace 10 to 30 minutes before the discharge of molten iron. In order to increase the content of silicon and manganese in cast iron.

The invention has the advantages of: 1. The casting production cost can be greatly reduced. The cost per ton of castings can be reduced by 20.2. The production process is free of dust, carbon dioxide and other waste gases, and no slag. Therefore, it protects the environment and the health of the workers. 3. It can reduce energy consumption by 38.7 percent. 4. The quality of the products is high. The scrap rate can be reduced to 5. 5. The ductile iron castings and steel castings can be produced. 6. The process is simple.

A method of casting molten iron using intermediate frequency electric furnace and scrap iron chips, which is characterized in that waste iron chips are fed into medium frequency electric furnace, at the same time carburizing agent is added in medium frequency electric furnace, and ferrosilicon and manganese iron are added in medium frequency electric furnace 10-30 minutes before hot metal is out of the oven. In order to increase the content of silicon and manganese in cast iron.

According to claim 1, a method for casting molten iron using an intermediate frequency electric furnace and scrap iron scrap is characterized in that carbon equivalent, carbon content, silicon content and hot metal temperature are measured when the molten iron is discharged.

According to claim 1, a method of casting molten iron using medium frequency electric furnace and scrap iron scrap is characterized in that coke powder is used as the carburizer.

According to claim 1, a method of casting molten iron with intermediate frequency electric furnace and scrap iron is characterized in that the ratio of above mentioned iron chips, ferrosilicon and ferromanganese is 1: 0.07: 0.04.