Fluidized bed reduction ironmaking method

• Main Authors: LIU BINGNAN, FAN CHUANLIN, HU DAICHAO, MA SUGANG, GE YU, REN WEI, ZHU JIANWEI, ZHANG WEI, ZHU QINGSHAN, PAN FENG
• Format: Patent
• Language: Chinese; English
• Published: 12.04.2024
• 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

The invention provides a fluidized bed reduction ironmaking method, a fluidized bed reduction ironmaking raw material has an inner core and a coating layer structure, the inner core is composed of iron ore concentrate and a binder, the mass percentage of the iron ore concentrate is 95-99.5%, and the mass percentage of the binder is 0.5-5%; the coating layer is prepared from coating liquid, and the coating liquid is prepared from the following components in percentage by mass: 30-50% of a coating agent, 3-5% of an additive and the balance of water. The fluidized bed reduction ironmaking method provided by the invention comprises the working procedures of uniform mixing of ingredients, preparation of granules, coating and drying of a fluidized bed, and oxidizing roasting. According to the fluidized bed reduction ironmaking method provided by the invention, the conventional iron ore concentrate raw material is subjected to a series of treatment such as granulation forming and surface coating, and the problem of