Method for making iron by using iron ore powder containing zinc and lead

• Main Authors: CHE YUMAN, LIU BINGNAN, SHAO LEI, YAO SHUO, SHAO SIWEI, HU DAICHAO, ZOU ZONGSHU, FEI JING, JIANG ZHE, GUO TIANYONG, LI ZHONG, XIE MINGHUI
• Format: Patent
• Language: Chinese; English
• Published: 18.04.2023
• Subjects: CASTING; CHEMISTRY; FERROUS OR NON-FERROUS ALLOYS; MAKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MANUFACTURE OF IRON OR STEEL; METALLURGY; METALLURGY OF IRON; PERFORMING OPERATIONS; POWDER METALLURGY; PRETREATMENT OF RAW MATERIALS; PRODUCTION AND REFINING OF METALS; TRANSPORTING; TREATMENT OF ALLOYS OR NON-FERROUS METALS; WORKING METALLIC POWDER

The invention relates to the technical field of ironmaking, in particular to a method for ironmaking by utilizing iron ore powder containing zinc and lead. The ironmaking method provided by the invention comprises the following steps: carrying out fluidized bed treatment on iron ore powder containing zinc and lead to obtain directly reduced iron powder and dust-containing tail gas; the direct reduction iron powder is subjected to hot pressing, and a hot-pressed iron block is obtained; the hot-pressed iron blocks are sent to a total-oxygen blast furnace for total-oxygen blast furnace smelting, and coal gas and molten iron/blast furnace slag are obtained; carrying out carbon dioxide separation on the coal gas to obtain carbon dioxide and refined coal gas; and the refined coal gas is reused for fluidized bed treatment and full-oxygen blast furnace smelting. According to the method, the iron ore powder containing zinc and lead is subjected to fluidized bed treatment before full-oxygen blast furnace smelting is ca