Bell-less top multi-ring matrix burden distribution central coke charging method of blast furnace

Abstract

The invention relates to a bell-less top multi-ring matrix burden distribution central coke charging method of a blast furnace, which belongs to the technical field of blast furnace burden distribution. The method comprises the following steps of: on the basis of a multi-ring matrix burden distribution method, firstly, distributing more than 50 percent of coke amount in the central area of a furnace throat so that the thickness of central coke is greater than that of edge coke and the burden surface of the furnace throat forms a steamed bread shape; removing a central mixture layer of the furnace throat to accurately control radial ore to coke ratio because the center of the burden surface is high while the edge is low. The invention has the advantages of being adapted to the fluctuation of coke quality, facilitating the use of ore with ultra-small size fraction, maintaining steady and smooth furnace conditions and realizing the aim of opening the center, stabilizing the edge so as to reduce production cost. The furnace top thermal imaging edge temperature is 120+ / -50 DEG C, and the center temperature is 450+ / -150 DEG C.

Description

technical field [0001] The invention belongs to the technical field of blast furnace material distribution, in particular to a coking method for the center of multi-ring matrix material distribution on a bellless top of a blast furnace. Background technique [0002] Blast furnace distribution refers to the reasonable selection and distribution of the charging sequence, loading method, rotating chute α angle, material line and batch weight when the charging is loaded into the furnace. The principle of the blast furnace material distribution method is to ensure the reasonable distribution of gas, improve the utilization rate of gas, and ensure the smooth operation of the blast furnace. Blast furnace material plays a key role in the stable operation of the blast furnace and the utilization of gas, that is, it plays a decisive role in the technical and economic indicators of the blast furnace - output and coke ratio. [0003] Bellless stove top cloth has gained certain experien...

AI Technical Summary

Problems solved by technology

[0008] However, in the aforementioned method of coking in the center of multi-ring matrix distribution on the top of the bellless furnace, because the material surface is funnel-shaped, it is easy to collapse the coke layer when distributing ore, and a mixed layer of material surface is formed near the center.

In the case of fluctuating coke quality, it is not easy to ensure the stability of central gas, and if necessary adjustment measures are not taken, it is easy to cause instability of furnace conditions

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