Method and system for treating metallurgical slag

• Main Authors: Wu Daohong, Wang Min
• Format: Patent
• Language: Chinese; English
• Published: 31.08.2016
• Subjects: CHEMISTRY; CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS; FERROUS OR NON-FERROUS ALLOYS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; METALLURGY; PRETREATMENT OF RAW MATERIALS; PRODUCTION AND REFINING OF METALS; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; TREATMENT OF ALLOYS OR NON-FERROUS METALS

The invention discloses a method and system for treating metallurgical slag. The method comprises the steps that the metallurgical slag, limestone and adhesives are subjected to forming treatment, so that first material pellets are obtained; oxidizing roasting is conducted on the first material pellets, so that fayalite in the metallurgical slag is converted into ferric oxide, and meanwhile oxidizing roasting products are obtained through desulfurization; the oxidizing roasting products are crushed, so that crushed oxidizing roasting products are obtained; the crushed oxidizing roasting products, reducing coal, the adhesives and water are subjected to forming treatment, so that second material pellets are obtained; reducing roasting is conducted on the second material pellets, so that the iron oxide in the second material pellets is converted into iron, and meanwhile reducing roasting products are obtained through desulfurization; and ore grinding and magnetic separation are conducted on the reducing roasting