| 摘要 |
PURPOSE: A method for recycling ferronickel slag is provided to produce high specific gravity materials, which are possibly used as concrete materials, by separating non-magnetically attaching slag with low iron content from ferronickel slag. CONSTITUTION: A method for recycling ferronickel slag includes the following steps of: preparing ferronickel slag(S100); separating the ferronickel slag into magnetically attaching slag and non-magnetically attaching slag by primary magnetic classification(S200); pulverizing the separated non-magnetically attaching slag(S300); and separating the pulverized slag into the magnetically attaching slag and non-magnetically attaching slag by secondary magnetic classification(S400). The ferronickel slag includes 50-60% of SiO2, 30-40% of MgO, 0.1-10% of Fe2O3, 0.1-1% of NiO, and impurities. The average diameter of the ferronickel slag is 10mm or less. The magnetic intensity of the primary magnetic classification and secondary magnetic classification are in a range between 3 and 6kG. [Reference numerals] (AA,CC) Magnetically attaching slag; (BB,DD) Non-magnetically attaching slag; (S100) Ferronickel slag preparation; (S200) Primary magnetic classification; (S300) Pulverization; (S400) Secondary magnetic classification |
