Blowing-in and charging method of blast furnace

Abstract

The invention belongs to the technical field of production of blast furnaces and in particular discloses a blowing-in and charging method of the blast furnace. The blowing-in and charging method comprises the following steps: 1) debugging each system before blowing-in of the blast furnace and preparing blowing-in furnace burdens; 2) adding empty coke into the blast furnace and filling into a partlocated below a furnace bosh and capable of forming a furnace burden softening zone; 3) conveying hot air into the blast furnace and controlling air pressure to be greater than or equal to 0.100Mpa; continually adding the empty coke into the blast furnace in an air conveying process until a material line is normal. According to the blowing-in and charging method of the blast furnace, provided by the invention, a blast furnace blowing-in method adopts a semi-charging manner and a condition that cold blowing-in furnace burdens are added into the blast furnace in one step is avoided; meanwhile, after part of the furnace burdens are pre-charged, zone air is blown and a material column can be blown to be loose through a zone air material driving line, so that on one hand, the air permeability of the material column is ensured; on the other hand, sufficient combustion of the furnace burdens is facilitated and the aim of saving the furnace burdens is realized.

Description

technical field [0001] The invention relates to a blast furnace start-up method, which belongs to the technical field of blast furnace production, and in particular to a blast furnace start-up charging method. Background technique [0002] The blast furnace is the beginning of a generation of furnace life. New construction, medium repair, and overhaul of blast furnaces all go through the recovery process of the furnace. Whether the recovery process of each furnace is smooth will directly affect the long-term stability of the furnace and the progress of various indicators after the furnace is opened. . Furnace charging is not simply to fill the furnace material below the blast furnace material line, but more importantly, to distribute the ore coke in the required position according to the reasonable gas flow distribution requirements of the blast furnace, and at the same time reduce the amount of powder into the furnace to provide unobstructed air flow after the blast furnace...

AI Technical Summary

Problems solved by technology

[0003] According to whether the charging process is air-supplied or not, the commonly used furnace charging methods are divided into: with wind charging and without wind charging, among them, the wind charging method can blow the powder in the furnace material out of the furnace through cold wind, effectively Reduce the powder into the furnace, and at the same time, affected by the blast, the material column is relatively loose after the furnace charge is loaded, and then the commonly used air-filled charging mode is to load the material according to the calculated charging table before the air supply, and load the furnace charge to normal According to the pre-prepared air supply regulations, the air supply will be restored to the material line. However, this charging method will cause problems such as poor air permeability of the material column and slow recovery of air supply, which is not conducive to the smooth recovery of the blast furnace.

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