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Direct injection molten iron desulphurization spray gun

A hot metal desulfurization, direct technology, applied in the field of hot metal pretreatment, can solve the problems of difficult to further improve the utilization efficiency of desulfurization agent, the desulfurization effect of lime powder is not fully exerted, and the consumption of desulfurization agent is high

Active Publication Date: 2015-03-04
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, a straight-through spray gun with a single nozzle is used, and after improvement and development, there is also an inverted T-shaped double nozzle spray gun. Due to the limitation of smooth injection and stirring kinetic energy, it is difficult to further improve the utilization efficiency of the desulfurizer, resulting in high consumption of desulfurizer and consumption of tons of iron and magnesium. The consumption of magnesium desulfurization by pure spraying metal particles invented in Ukraine is basically the same, and the desulfurization effect of lime powder has not been fully exerted

Method used

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  • Direct injection molten iron desulphurization spray gun
  • Direct injection molten iron desulphurization spray gun
  • Direct injection molten iron desulphurization spray gun

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] Such as figure 1 , 4 , 5, 6, 7, 8, 9, and 10, a molten iron desulfurization spray gun for direct injection of metal particle magnesium, including a connecting flange 1 and a gun barrel connected in sequence, and the gun barrel 2 is connected by a connecting section The gun barrel 2.1 and the gun body section gun barrel 2.2 are composed, the connecting section gun barrel 2.1 includes the gun core 6, the gun body section gun barrel 2.2 includes the gun core 6, the anchor piece group 7 and the refractory castable lining 8, and the gun core 6 is sequentially arranged from inside to outside Both are the main pipe 6.1 and the reinforcing pipe 6.2. The outside of the main pipe 6.1 takes the axis as the center line and evenly arranges a plurality of bridging weldments 6.3 for connecting the reinforcing pipe 6.2, and the lower end of the gun core 6 of the gun barrel 2.2. It is connected with a distributor 4 for distributing metal particle magnesium, magnesium-based or calcium-b...

Embodiment 2

[0072] as attached figure 2 , 5 , 6, 7, 8, 9 and 10 show: a kind of molten iron desulfurization spray gun for direct injection of metal particle magnesium, magnesium-based or calcium-based desulfurizer, this embodiment is basically the same as embodiment 1, the difference is that :

[0073] In the composition of the spray gun, there is no injection pipe 2 and injection pipe socket 4, and the connecting short pipe 4.1 is welded and communicated with the main pipe 6.1, and the inner and outer diameters of the short connecting pipe 4.1 are the same as those of the main pipe 6.1.

[0074] How to use the spray gun:

[0075] The spray gun is directly used for desulfurization, and the insertion depth of the spray gun is controlled so that the outlet of the spray pipe 9 is 250-350 mm away from the bottom of the tank. According to the number of spray gun injection pipes 9 and the total area of ​​the injection port, the pressure and flow of the injection carrier gas are controlled t...

Embodiment 3

[0077] as attached image 3 , 4 , 5, 6, 7, 8, 9 and 10, the difference between this embodiment and embodiment 1 and embodiment 2 is that the gun body at the gun head where the distributor 4 and the spray pipe 9 are located is a thickened gun body , the junction of the bottom surface and the side of the gun head is a circular arc transition surface, and the bevel transition between the thickened gun body and the non-thickened gun body. Other structures and using method are identical with embodiment 1, embodiment 2.

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Abstract

The invention discloses a direct injection molten iron desulphurization spray gun for a metal particle magnesium or magnesium-based or calcium-based desulphurization agent. The direct injection molten iron desulphurization spray gun comprises a connecting flange and a gun barrel which are sequentially connected and communicated, wherein the gun barrel comprises a connecting section gun barrel and a gun body section gun barrel; the connecting section gun barrel comprises a gun core; a distributor is connected with the lower end of the gun core of the gun body section gun barrel; the distributor comprises an upper end short connecting pipe, a lower end plug platform and a plurality of through holes formed in the wall of the short connecting pipe; and each through hole is communicated with a jetting pipe, and the jetting pipes are distributed in a fire-proof pouring material liner positioned outside the side wall of the distributor. The direct injection molten iron desulphurization spray gun disclosed by the invention can be used for enhancing the jetting strength, extending the desulphurization reaction area and intensifying the gasification and dissolution of metal particle magnesium through structural design, and can be used for enhancing the adaptability on low-quality metal particle magnesium and jetting desulphurization of molten iron tanks with different sizes, extending the adaptive capacity of a process and reducing the consumption cost of the molten iron desulphurization metal particle magnesium through the improvement of desulphurization process steps.

Description

technical field [0001] The invention relates to the field of molten iron pretreatment, in particular to a direct injection type molten iron desulfurization spray gun for metal particle magnesium, magnesium-based or calcium-based desulfurizers. Background technique [0002] There is a very high affinity between metallic magnesium and sulfur. During the desulfurization process of metallic magnesium, the desulfurization reaction of metallic magnesium is mainly completed by the homogeneous reaction of metallic magnesium and sulfur dissolved in molten iron, which is the strongest desulfurization of molten iron. One of the desulfurizers, it has the advantages of less consumption, slag amount, less iron loss and less environmental pollution. Because the existence of slag does not affect the homogeneous desulfurization reaction of magnesium, it is not sensitive to blast furnace slag in molten iron; because the amount of magnesium used for desulfurization is small, the investment in ...

Claims

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Application Information

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IPC IPC(8): C21C1/02C21C7/064C22C33/12
Inventor 欧阳德刚
Owner 武汉钢铁有限公司
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