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Top plug-in type spray gun for ventilating and slag gathering and preparation method thereof

A plug-in spray gun technology, which is applied to the top plug-in spray gun for air-permeable slag gathering in the molten iron pretreatment and slag removal process and its preparation field, can solve the problems of optimization of spray gun structure parameters and unexplainable problems, and achieve the improvement of comprehensive integrity and resistance The effect of mechanical damage ability, convenient layout, and reduced production difficulty

Active Publication Date: 2014-11-26
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 relevant reports, there are few studies at home and abroad on the influence of the structural parameters and operating control parameters of the air blowing lance on the slag removal effect, and the reasons for the above problems cannot be explained, and it is far from being able to directly guide the structural parameter optimization and actual production operation of the spray lance. process improvement

Method used

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  • Top plug-in type spray gun for ventilating and slag gathering and preparation method thereof
  • Top plug-in type spray gun for ventilating and slag gathering and preparation method thereof
  • Top plug-in type spray gun for ventilating and slag gathering and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Such as Figure 1~2 As shown, a top-inserted spray gun for air-permeable slag accumulation includes a connecting section 1, a gun body section 2, and an injection section 3 connected in sequence, and the axial cross-sectional size of the injection section 3 is larger than that of the gun body section 2. It consists of a flange 1.1 and a connecting pipe 1.2; the gun body section 2 is composed of a gun body section supervisor 2.1, a gun body section V-shaped anchor 2.2 and a gun body section refractory castable lining 2.3; the spray section 3 is composed of a nozzle with a closed end. The air chamber 3.1 in the blowing section, the V-shaped anchor 3.2 in the blowing section and the refractory castable lining 3.3 in the blowing section,

[0034] The gun body section supervisor 2.1 is an ordinary carbon steel seamless pipe, wherein one end is welded to communicate with the flange 1.1, and the other end is welded to communicate with the blowing section air chamber 3.1. The ...

Embodiment 2

[0046] Such as Figure 3-4 As shown, a top-inserted spray gun for air-permeable slag accumulation, this embodiment is basically the same as Embodiment 1, the difference is:

[0047] The diffuse nozzle 3.4 has a slit structure, and the injection section 3 is an elliptical cylinder whose upper and lower edges are arc transition surfaces.

Embodiment 3

[0049] Such as Figure 5 As shown, a top-inserted spray gun for air-permeable slag accumulation, this embodiment is basically the same as Embodiment 1, the difference is:

[0050] The diffuse nozzle 3.4 has a capillary structure, and is arranged along the circumferential direction of the metal gas chamber 3 with an upward inclination of 10°. The injection section 3 is a round platform with a circular arc transition surface.

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Abstract

The invention discloses a top plug-in type spray gun for ventilating and slag gathering and a preparation method thereof. The spray gun comprises a connection segment, a gun body segment and a spray segment which are in successive communication; the spray segment consists of a spray-segment air chamber enclosed at the end, a spray-segment V-shaped anchoring piece and a spray-segment refractory castable; the sidewall of the spray-segment air chamber is provided with dispersion-type nozzles perpendicular to the axis of the sidewall; and the included angle of the center axes of two dispersion-type nozzles at the outermost side is less than 150 DEG. The method comprises: firstly processing and preparing all metal parts of the spray gun according to structural parameters of the to-be prepared spray gun, and removing rust; then preparing and obtaining the spray segment, communicating a main pipe of the gun body segment with the spray-segment air chamber through welding; and selecting steel fiber reinforced corundum mullite castable to perform casting molding, so as to obtain the spray gun. The provided spray gun preparation method guarantees smooth preparation of the spray gun, the structure dimension precision of the spray gun, unblocked gas injection channel and metal structure airtightness, and helps to improve the internal quality and the usage performance of the spray gun.

Description

technical field [0001] The invention belongs to the field of molten iron pretreatment, and the invention relates to a slag-accumulating air-permeable device for assisting molten iron slag removal and a preparation method thereof, in particular to a top-inserted spray gun for air-permeable slag-accumulation during molten iron pretreatment and slag removal and its preparation method. Background technique [0002] Hot metal pretreatment and slag removal technology is one of the key technologies of the clean steel production platform, and it is also an essential process in the production process of the modern steel industry. At present, iron and steel enterprises at home and abroad generally use the slag remover to remove the molten iron slag on the molten iron surface after pretreatment; The molten iron slag is difficult to remove; at the same time, due to the dispersion and floating of the molten iron slag on the molten iron surface, the amount of slag removed by a single act...

Claims

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Application Information

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IPC IPC(8): C21C7/072
CPCY02P10/20
Inventor 欧阳德刚罗安智余明红李胜超李明晖
Owner 武汉钢铁有限公司
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