Recently, a blast furnace of Anshan Iron and Steel General Plant successfully supplied air after 17 days of annual repair, achieving 48 hours of production and 72 hours of efficiency after opening the furnace, and shortening the recovery time by 48 hours. At present, the blast furnace is running smoothly, and the coke ratio into the furnace, the fuel ratio of the blast furnace, the utilization coefficient of the blast furnace, and the daily output of pig iron continue to be optimized.
In order to ensure the completion of the maintenance project on schedule and with high quality, Anshan Iron and Steel General Ironmaking Plant follows the principle of repairing and must be corrected, and prepares the construction organization design plan for 6 key projects, and formulates all-factor risk identification and prevention measures for 4 high-risk operations. In the furnace shutdown link, the furnace cylinder is cleaned by the method of recovering gas and pumping water and stopping the furnace; The furnace body is made of copper-steel combined water-cooled plate; The spraying adopts high-conductivity and anti-wear silicon carbide spray coating, and the furnace body is sprayed by artificial wet method; The hydraulic system of the pressure equalizer valve on the top of the furnace adds a standby control system to realize remote automatic switching, prevent failure and shutdown, and provide strong support for the intensity reduction and consumption of the blast furnace.
After the blast furnace is repaired and ignited at the end of the year, spot inspection, casting and transportation, slag flushing, pulverized coal and other types of work are closely cooperated, and the construction personnel are linked to echo and coordinate the tasks of burning iron mouth, slag removal iron, and ditch pad, so as to lay the foundation for rapid production and efficiency and shortening the recovery time.
All-media reporter Wang Yi