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Desulfurization spray gun for mixed injection of molten iron or in-line mixed injection and step-by-step injection

A technology of desulfurization spray gun and mixed spray, which is applied in the field of desulfurization spray gun, can solve the problems of non-uniform arrangement of multi-spout nozzles that do not involve the structure size of the nozzle outlet end surface, and achieve the effects of avoiding rapid expansion and floating, facilitating dispersion, and enhancing the synergistic effect of stirring

Active Publication Date: 2017-08-29
武汉钢铁有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to the research results of the above-mentioned factors affecting the three basic kinetic parameters of molten iron injection desulfurization, although scholars at home and abroad have conducted systematic research on the injection process parameters, operating parameters, nozzle structure and number of spray guns, etc., they have not involved Influence of the structural size between the outlet end face of the nozzle and the side wall of the spray gun body and the non-uniform arrangement of multiple nozzles

Method used

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  • Desulfurization spray gun for mixed injection of molten iron or in-line mixed injection and step-by-step injection
  • Desulfurization spray gun for mixed injection of molten iron or in-line mixed injection and step-by-step injection
  • Desulfurization spray gun for mixed injection of molten iron or in-line mixed injection and step-by-step injection

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Such as figure 1 , 2 , 3, 4 and 7: the desulfurization spray gun used for molten iron mixed injection or online mixed composite injection and step-by-step injection, including the connected spray gun connecting section 1, the straight section of the gun body 2, the round gun body Arc bending section 3, distributor 4 and spray straight section 5;

[0043] Spray gun connection section 1 comprises flange connector or threaded connector 6 and metal steel pipe 7; The straight line segment is bent in 5 directions, and the bending arc angle α is 90-120°.

[0044] The gun body straight line section 2 and the gun body arc curved section 3 comprise metal steel pipes 7, the ends of the metal steel pipes 7 are connected with the arc steel plate 4.1 of the distributor 4, and the other end of the arc steel plate 4.1 is symmetrically provided with 2 through holes. hole 4.2;

[0045] The included angle β between the axes of the two through holes 4.2 is 90-150°, the axis of the thro...

Embodiment 2

[0057] Such as figure 1 , 2 , 3, 5, 6 and 8 show: the desulfurization spray gun that is used for the compound injection of molten iron mixing injection or on-line mixing and step-by-step injection, this spray gun is basically the same as embodiment 1, the difference is:

[0058] The cross-sectional outlines of the gun body straight section 2 and the gun body arc curved section 3 are elliptical or drum-shaped; the metal spray pipe 14 is composed of a single metal straight pipe 18; the method of using the spray gun is the same as in embodiment 1.

Embodiment 3

[0060] Such as figure 1 , 2 , 3, 4, 5, 6, 7 and 8: the desulfurization spray gun used for composite injection and step-by-step injection of molten iron mixed injection or online mixing, this spray gun is basically the same as embodiment 1, the difference is : the cross-section outer contour structure of the gun body straight section 2 and the gun body arc curved section 3 and the structure of the metal spray pipe 14 match each other.

[0061] Spray gun usage method is identical with embodiment 1.

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Abstract

The invention discloses a compound jetting and step-by-step jetting desulfurization spray gun for molten iron mixed jetting or online mixing. The spray gun comprises a spray gun connecting section, a gun body straight line section, a gun body arc bent section, a distributor and a jetting straight line section, which are communicated in sequence, wherein the spray gun connecting section comprises a connecting piece and a metal steel pipe; the gun body straight line section and the gun body arc bent section comprise a metal steel pipe; the end of the metal steel pipe is connected with an arc steel plate of the distributor; two through holes are symmetrically formed in the plate wall of one end of the arc steel plate; the metal steel pipe of the gun body straight line section and the gun body arc bent section is uniformly and symmetrically welded with 1-3 pairs of strip-shaped reinforcing plates in the peripheral directions; and one pair of the reinforcing plates is welded on the outer wall of the arc steel plate in the bending direction of the gun body arc bent section. Through the design of structure form and structure size of the spray gun, three key kinetic parameters, i.e., the jetting and uniform mixing time of molten iron jetting desulphurization, the bubble penetration rate of a desulphurization powder agent and the stopping time in molten iron, are improved.

Description

technical field [0001] The invention relates to the technical field of molten iron pretreatment, in particular to a desulfurization spray gun for mixed injection or on-line mixed injection and step-by-step injection of molten iron. Background technique [0002] In 1970, the former Thyssen Company of West Germany successfully researched and put into use the ATH method for molten iron injection desulfurization, creating a precedent for large-scale molten iron injection pretreatment. The nozzle spray gun is inserted obliquely into the torpedo tank mixed iron car at an angle of 60° to the horizontal direction, and 108 kg of CaC-based composite desulfurizer is blown in per minute. The processing time is about 8 minutes. N m 3 , that is, torpedo can obliquely inserted molten iron injection desulfurization method. Since then, Nippon Steel Corporation of Japan, through technology introduction and digestion and innovation, invented and popularized the torpedo pot molten iron top-bl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21C1/02
Inventor 欧阳德刚李明晖李具中刘路长罗安智夏春祥刘凯
Owner 武汉钢铁有限公司