Built-in type elbow desulfurization spray gun

Abstract

The present invention belongs to the field of a hot metal desulfurization treatment apparatus, especially relates to a built-in type elbow desulfurization spray gun. The built-in type elbow desulfurization spray gun comprises a gun body (2), wherein the gun body (2) comprises a first pipeline (101), a second pipeline (102), a fire resistant material layer (4), a framework (3) and annular type ribs (5). The framework (3) is arranged inside the fire resistant material layer, and forms fixed match connections with the first pipeline (101) and the second pipeline (102). The annular type ribs (5) form fixed match connections with the first pipeline (101) and the second pipeline (102) by lateral ribs (6). An eccentric angle alpha of the tail part of the first pipeline (101) is more than or equal to 20 DEG and less than or equal to 35 DEG. The second pipeline (102) is the straight through type pipeline. The body bottom (7) of the gun body (2) is the semispherical bottom. The annular type ribs (5) are a plurality of the concentric ring ribs. Talon frameworks (9) are fixedly arranged on the lateral ribs (6). According to the present invention, the stable combination ability of the fire resistant material and the gun body framework is high, such that the mechanical deformation of the framework is not easily generated, and the dead angle is not easily generated during the injection process.

Description

technical field [0001] The invention belongs to the field of molten iron desulfurization treatment devices, in particular to a built-in elbow desulfurization spray gun. Background technique [0002] At present, before steelmaking in the smelting industry, it is generally necessary to carry out desulfurization pretreatment on molten iron, and the main equipment used in the above process is the desulfurization spray gun. Due to the fact that the existing hot metal desulfurization spray gun does not fully consider the difference in physical properties between the pipeline and the refractory material layer in the design of the skeleton and the gun body, when the spray gun is used in an alternating state of cold and hot, the refractory material layer is likely to cause cracking and falling off. In addition, due to the low degree of stability between the refractory material and the frame of the gun body, and the eccentricity of the frame of the gun body, the actual operation of th...

AI Technical Summary

Problems solved by technology

Due to the fact that the existing molten iron desulfurization spray gun does not fully consider the difference in physical properties between the pipeline and the refractory material layer in the design of the skeleton and the gun body, when the spray gun is used in an alternating state of cold and hot, the refractory material layer is likely to cause cracking and falling off.

In addition, due to the low degree of stability between the refractory material and the frame of the gun body, and the eccentricity of the frame of the gun body, the actual operation of the equipment has the characteristics of failure of the refractory material layer, mechanical deformation of the frame of the gun body, and short life of the gun body. The tail nozzle with a spray gun is generally set as a straight-through type, which often causes a dead angle of spraying

Due to the above shortcomings, desulfurization outside the furnace cannot be carried out smoothly, especially in large (equal to or greater than 160t) ladles, the structural defects are more obvious

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