Material layer structure of blast furnace

Abstract

The invention relates to a material layer structure in an iron-making blast furnace and particularly relates to a single pellet layer included material layer structure of a blast furnace. The material layer structure comprises mineral aggregates and cokes filled in the upper part of a blast furnace body, wherein the mineral aggregates and the cokes are respectively and independently filled to form mixing mineral layers and coke layers; the mixing mineral layers and the coke layers are arranged at intervals and are circularly overlaid; the thickness of each layer in the material layers of the blast furnace is the thickness of the material layer, which is lower than the material layer on the periphery of the round cavity, at the central position of a round cavity in the blast furnace; the material level is of a funnel shape with a downward cone angle; the pellet layers are also arranged between the coke layers and the mixing mineral layers and can be added into an overall material layer structure as a material layer constituent part of the overall material layer structure. By using the material layer structure with the 'single pellet layers', sticking substances in the furnace can be washed in time and the blast furnace can stably run for a long period of time in low cost.

Description

technical field [0001] The invention relates to a material layer structure in an iron-making blast furnace, in particular to a blast furnace material layer structure containing a single pellet layer. Background technique [0002] The blast furnace used for ironmaking in the metallurgical industry is a continuous cylindrical smelting equipment. The charge needs to be continuously loaded from the top of the blast furnace, and the hot air needs to be continuously blown in from the tuyeres at the lower part of the blast furnace. The molten iron is discharged from the taphole at the lower part of the blast furnace. Therefore, to ensure the continuity and stability of blast furnace production, we must first do in-depth and meticulous work on the charge of the blast furnace, including the stability of various physical and chemical indicators of the charge, the stability of the proportion structure of the charge, and the stability of the layer structure. Since the stability of the ...

AI Technical Summary

Problems solved by technology

When some abnormal conditions such as "bonding" occur in the furnace, the conventional method is to add some fluorite or manganese ore as a cleaning agent to the existing mixed ore layer to deal with the "bonding" problem in the furnace. The cleaning agent used generally does not contain iron or contains very low iron, which is likely to cause additional consumption of coke, which is not conducive to reducing production costs

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