BLAST FURNACE SMELTING METHOD FOR HIGH-GRADE, VANADIUM RICH, CHROMIUM-BEARING VANADIUM-TITANIUM MAGNETITE (CVTM) CONCENTRATE

• Main Authors: ZHANG, Xian feng, ZHANG, Zhi xiang, ZHOU, Sheng cheng, ZHOU, Mi, YAO, Ben jin, JIANG, Tao, CHENG, Gong jin, XUE, Xiang xin, YANG, Song tao, ZHANG, Yong
• Format: Patent
• Language: Chinese; English; French
• Published: 03.01.2019
• Subjects: CHEMISTRY; FERROUS OR NON-FERROUS ALLOYS; MANUFACTURE OF IRON OR STEEL; METALLURGY; METALLURGY OF IRON; PRETREATMENT OF RAW MATERIALS; PRODUCTION AND REFINING OF METALS; TREATMENT OF ALLOYS OR NON-FERROUS METALS

A blast furnace smelting method for high-grade, vanadium rich, chromium-bearing vanadium-titanium magnetite (CVTM) concentrate. The method is carried out according to the following steps : (1) mixing high-grade, vanadium rich, CVTM concentrate powder, iron concentrate powder, magnesite, lime, return fines, and a fuel to produce high-magnesium sintered ore; (2) pressing the high-grade, vanadium rich, CVTM concentrate powder, bentonite, and the fuel into pellets; (3) mixing the high-magnesium sintered ore and the pellets, and adding lump iron ore to form a blast furnace charge; (4) initiating blast furnace smelting, comprising configuring a charging system, an air supply system, a heating system, and a slagging system with a wind temperature of 1100-1200°C, a coke ratio of 330-380 kg/t, and a coal ratio of 160-200 kg/t; and (5) discharging molten iron once every 70-90 min with a molten iron temperature of 1430-1500°C. La présente invention concerne un procédé de fusion de haut-fourneau pour concentré de magnéti