High-performance lances for hot metal injection pretreatment

A pretreatment, high-performance technology, applied in the field of high-performance spray guns, can solve the problems of insufficient attention to the contribution of desulfurization efficiency, and restrict the technical and economic indicators of desulfurization, so as to improve the penetration ratio of bubbles, increase the hysteresis effect, and enhance the stirring intensity Effect

Active Publication Date: 2017-01-18
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

However, insufficient attention has been paid to the contribution of the spray gun structure used in actual production to the desulfurization efficiency. The structure of the conventional spray gun is basically continued. Research on Desulfurization Spray Lance with High Efficiency Injection of Hot Metal

Method used

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  • High-performance lances for hot metal injection pretreatment
  • High-performance lances for hot metal injection pretreatment
  • High-performance lances for hot metal injection pretreatment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Such as figure 1 , 4 , 6 and 9, a high-performance spray gun used for molten iron injection pretreatment, including a connection section 1, a gun body section 2, and a spray section 3 connected in sequence, the connection section 1 includes a connecting flange 1.1, and the inside of the spray gun A spray gun main pipe 5 is provided, and the spray gun main pipe 5 is arranged between the connecting flange 1.1 and the bottom head 10 of the spray gun, and a swirl diffuser 4 is arranged between the gun body section 2 and the spray section 3, and the swirl diffuser 4 includes sequentially The upper circular platform body 4.1, the cylindrical body 4.2 and the lower rounded platform body 4.3 are connected, the upper round platform body 4.1 is connected with the gun body section 2, the lower inverted round platform body 4.3 is connected with the injection section 3, and the spray gun main pipe 5 and the head 10 are connected along the Two nozzles 8 are evenly opened in the circ...

Embodiment 2

[0048] Such as figure 1 , 4 , 6 and 10, the structure of this embodiment is basically the same as that of Embodiment 1, the difference is that:

[0049] The two nozzles 8 communicate with the main pipe 5 of the spray gun eccentrically, and the eccentric distance is e=XXXX~XXXX. 0≤e≤(D-d) / 2, wherein, D is the inner diameter of the main pipe 5 of the spray gun, and d is the inner diameter of the nozzle 8 .

Embodiment 3

[0051] Such as figure 1 , 4 , 6, and 11, the structure of this embodiment is basically the same as that of Embodiment 1, the difference is that:

[0052] There are 3 nozzles 8, and the three nozzles 8 communicate with the center of the spray gun main pipe 5.

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Abstract

The invention discloses a high-performance spray gun for molten iron injection pretreatment. The high-performance spray gun comprises a connection segment, a gun body segment and an injection segment, which are sequentially communicated, wherein a swirling diffuser is arranged between the gun body segment and the injection segment and comprises an upper cone, a cylinder and a lower reversed cone, which are sequentially communicated; 2-4 nozzles are uniformly formed between a main pipe of the spray gun and a seal head in the circumferential direction of the spray gun and positioned in the side wall of the injection segment; swirling pieces obliquely arranged on the outer wall from the top end of the lower reversed cone to the bottom end surface of the injection segment and positioned above the nozzles. By strengthening three key kinetic parameters of molten iron injection pretreatment, the spray gun significantly improves the kinetic conditions of molten iron injection pretreatment and achieves the comprehensive purposes of improving the sulfur removal efficiency of injection pretreatment and the utilization rate of desulfurizer reaction, shortening the injection time and increasing the production capacity of desulfurization equipment.

Description

technical field [0001] The invention relates to the field of molten iron pretreatment, in particular to a high-performance spray gun used for molten iron injection pretreatment. Background technique [0002] The document "External desulfurization of molten iron, Shanxi Metallurgy, 2007, No1" reported that molten iron is the basic raw material for molten steel smelting, and its chemical composition and physical properties determine the quality of steel products and the benefits of enterprises to some extent. Therefore, Since the 1970s, people began to pay attention to the development of molten iron pretreatment technology, and continuously improved its technology and methods to remove harmful elements in molten iron. In addition to sulfur-containing steel, sulfur is one of the main harmful elements in steel, but in the process of blast furnace ironmaking, it is necessary to increase the alkalinity of slag and furnace temperature, which will reduce the technical and economic i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21C7/064
Inventor 欧阳德刚洪军刘路长李明晖
Owner 武汉钢铁有限公司
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