Center coke adding and distributing method

Abstract

The invention discloses a center coke adding and distributing method. The method comprises the following steps: after the material distribution condition is met, opening a lower sealing valve and a discharging gate to start distributing materials and closing the discharging gate after the amount of sub-center coke is distributed, stopping distributing the materials into a furnace, continuously tilting a chute, opening the discharging gate to the maximum extent to continuously distribute the materials after the chute reaches a pure center set material distribution angle, and finishing materialdistribution until the coke amount in a weighing tank is completely distributed into the furnace. The coke distribution amount of a non-mining area can be greatly reduced, the center coke platform width is reduced, and the pure center coke amount proportion is increased. As the coke amount in the non-mining area is increased, the gas utilization rate is increased; and as the pure center coke amount is increased and the center air permeability is enhanced, the combination of increase of the pure center coke amount and enhancement of the center air permeability has great significance in reducingthe fuel consumption and stabilizing smooth operation of the blast furnace, especially when the unstable quality of raw fuel changes.

Description

technical field [0001] The invention relates to the technical field of metallurgy, in particular to a method for charging and distributing coke for a blast furnace. Background technique [0002] In steel production enterprises, cost reduction is particularly important. The cost of pig iron accounts for more than 60% of the total cost of steel products. In order to ensure the stable growth of economic benefits, while ensuring the output of pig iron, the blast furnace should reduce the ratio of coke to fuel in the furnace, so as to reduce the cost of pig iron and increase the efficiency of enterprises. The central coke cloth is mainly used in blast furnace ironmaking production, which is to add a small amount of coke to the center of the blast furnace by using the furnace top charging equipment to reduce the ore-coke ratio in the narrow range of the center of the blast furnace, improve the air permeability of the center, and make more gas flow Passing ensures the formation of...

AI Technical Summary

Problems solved by technology

The existing central coking technology is not conducive to the reduction of fuel consumption due to the relatively large amount of central coking, the platform is too wide, and the gas utilization rate is low.

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