Blast furnace material distribution method for improving coal gas utilization rate

• Main Authors: CHE YUMAN, LIU BINGNAN, YAO SHUO, SHAO SIWEI, HU DAICHAO, FEI JING, JIANG ZHE, ZHU JIANWEI, GUO TIANYONG, LI ZHONG
• Format: Patent
• Language: Chinese; English
• Published: 30.05.2023
• Subjects: CHEMISTRY; MANUFACTURE OF IRON OR STEEL; METALLURGY; METALLURGY OF IRON

The invention relates to a blast furnace material distribution method for improving coal gas utilization rate, which comprises the following steps of: distributing 20-30 percent of coke in a secondary edge area of a furnace throat by adopting a multi-ring matrix material distribution mode, and uniformly distributing ores on the edge, a middle annular belt and a secondary central belt of the furnace throat, the distribution amount of coke and ore in the secondary marginal area is larger than that in other areas, and coal gas flow distribution with the secondary marginal area of the furnace throat as the main part and the center of the furnace throat as the auxiliary part is formed. A stable gas passage is formed on the blast furnace secondary edge annular belt, so that the air permeability of the blast furnace is ensured; meanwhile, the hearth center accumulation phenomenon is avoided, stable and smooth operation of the blast furnace is guaranteed, and productivity is improved; large-angle-difference material