A method of prolonging the depth of blast furnace tap hole

Abstract

This application discloses a method for extending the depth of the blast furnace taphole. The method for extending the depth of the blast furnace taphole is to remove coke samples from the tuyere area during the blast furnace shutdown period, analyze the particle size composition, and calculate the degradation of coke in the blast furnace Degree, based on this, reasonably adjust the Masha value of the blast mud, that is, the plastic strength, control the shape of the mud bag in the furnace, and extend the depth of the taphole; It is difficult to push forward in the furnace. At this time, reducing the Mascia value of the gun mud and improving the plasticity of the gun mud is conducive to the extension of the mud bag along the centerline of the taphole to the furnace; when the coke particle size is large, the inside of the hearth The gaps between coke particles are large, and the gun mud is relatively easy to extend into the furnace. At this time, the Marshall value is appropriately increased to further increase the overall strength of the mud bag on the premise of ensuring a reasonable shape of the mud bag. Reasonable adjustment of the Masha value of the gun mud by this method can effectively extend the depth of the taphole and reduce the occurrence of shallow tapholes.

Description

technical field [0001] The invention belongs to the technical field of ironmaking, and particularly relates to a method for extending the taphole depth of a blast furnace. Background technique [0002] With the large-scale development of blast furnaces, the amount of iron passing through a single taphole increases significantly, the taphole erosion intensifies, and the phenomenon of shallow taphole depth often occurs. In order to extend the depth of the tap hole, most domestic blast furnaces will take measures such as increasing the amount of mud, adjusting the distribution matrix, extending the length of the tuyere and changing the tap sequence. [0003] Increasing the amount of mud is mainly to extend the depth of the tap hole by increasing the volume of the mud bag in the furnace. When choosing this method, the increase of the tap hole is mainly determined by experience. When it is large, it will cause the tap hole to break, and the tap hole depth will be shorter. Adjus...

AI Technical Summary

Problems solved by technology

[0004] Technical problem to be solved: This application mainly proposes a method for prolonging the depth of the blast furnace taphole, which solves the problems in the prior art that the taphole erosion is intensified, the depth of the taphole is relatively shallow, the impact on the front structure of the furnace is large, and the blast furnace as a whole Technical problems such as stability and forward movement have a greater impact