Erosion-resistant and wear-resistant molten iron desulfurization gun

Abstract

The utility model relates to an erosion-resistant and wear-resistant molten iron desulfurization gun which comprises a gun body, a slag line part and a stirring head, the slag line part is coaxially and fixedly connected to the outer side of the circumference of the upper part of the gun body; the stirring head is coaxially and fixedly connected to the lower end of the gun body; the outer diameter of the slag line part is larger than that of the gun body. According to the utility model, the slag line part is thickened, and different parts of the desulfurization gun are cast and molded by using different materials, so that the problems of perforation of the desulfurization gun, stripping of refractory materials, breakage of the spray gun and the like caused by the fact that the slag line part of the desulfurization gun is easy to erode and wear can be effectively solved.

Description

Technical Field

[0001] The utility model relates to the technical field of steelmaking, in particular to a corrosion-resistant and wear-resistant molten iron desulfurization gun. Background Art

[0002] Sulfur is a harmful element in most steels. In steelmaking, it is necessary to remove sulfur from molten iron to a level controlled by the type of steel. At present, molten iron pretreatment desulfurization mainly adopts KR stirring desulfurization, spray desulfurization and rotary spray desulfurization.

[0003] In the process of desulfurization, the service life of the desulfurization gun is often a key indicator for evaluating the economic efficiency of the desulfurization system. At present, a key factor leading to the low service life of the desulfurization gun is the perforation of the desulfurization gun, which is usually located at the slag line (between the molten iron surface and the desulfurization slag). This part is corroded by the desulfurization slag, and the friction and wear between the high-speed rotating desulfurization gun refractory and the desulfurization slag cause the refractory material in this part to corrode and fall off, which eventually leads to perforation of the desulfurization gun or even gun breakage, seriously affecting the service life of the desulfurization gun. Summary of the invention

[0004] In view of the above problems, the purpose of the utility model is to provide a corrosion-resistant and wear-resistant molten iron desulfurization gun, which can effectively solve the problems of easy erosion and wear of the slag line of the desulfurization gun, resulting in perforation of the desulfurization gun, peeling of refractory materials, and breakage of the spray gun.

[0005] The technical solution adopted by the utility model is as follows:

[0006] The utility model proposes a corrosion-resistant and wear-resistant molten iron desulfurization gun, comprising a gun body, a slag line part and a stirring head; the slag line part is coaxially fixed to the circumferential outer side of the upper part of the gun body; the stirring head is coaxially fixed to the lower end of the gun body; the outer diameter of the slag line part is greater than the outer diameter of the gun body.

[0007] Furthermore, a desulfurization clamping portion is coaxially fixedly connected to the upper end of the gun body through a flange.

[0008] Furthermore, the slag line portion is made of aluminum-magnesium refractory material.

[0009] Furthermore, the gun body and the stirring head are made of aluminum-silicon refractory material.

[0010] Furthermore, 2-5 blades are evenly distributed on the outer circumference of the stirring head.

[0011] Compared with the prior art, the utility model has the following beneficial effects:

[0012] The utility model thickens the slag line and uses different refractory materials to cast different parts of the desulfurization gun, which can effectively solve the problems of easy erosion and wear of the slag line of the desulfurization gun, resulting in perforation of the desulfurization gun, peeling of refractory materials, and breakage of the spray gun. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0014] Among them, the figure markings are: 1-desulfurization clamping part; 2-flange; 3-slag line part; 4-gun body; 5-stirring head. DETAILED DESCRIPTION

[0015] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] It should be noted that, in the description of the present invention, the terms "upper", "lower", "top", "bottom", "one side", "the other side", "left", "right", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not mean that the device or element must have a specific orientation, be constructed and operated in a specific orientation.

[0017] See attached Figure 1 The utility model proposes a corrosion-resistant and wear-resistant hot metal desulfurization gun, comprising a gun body 4, a slag line part 3 and a stirring head 5; the slag line part 3 is coaxially fixed to the outer circumference of the upper part of the gun body 4; the stirring head 5 is coaxially fixed to the lower end of the gun body 4; wherein the outer diameter of the slag line part 3 is greater than the outer diameter of the gun body. In this embodiment, the upper end of the gun body 4 is coaxially fixed with a desulfurization clamping part 1 through a flange 2.

[0018] The position of the slag line varies with the amount of molten iron loaded and the insertion depth of the desulfurization gun. Therefore, the slag line is not a point line, but an area. Usually, the slag line of the desulfurization gun starts at 600-1000mm below the flange 2 and extends downward for about 500mm-1600mm.

[0019] In this embodiment, the slag line portion 3 is made of aluminum-magnesium refractory material; the gun body 4 and the stirring head 5 are made of aluminum-silicon refractory material; the stirring head 5 is a bladeless mechanism or a propeller structure with 2-5 blades evenly distributed on the outer circumference.

[0020] The utility model thickens the slag line part 3, specifically by improving the desulfurization gun production mold. The slag line part 3 is thickened during mold design, specifically taking the desulfurization gun axis point as the midpoint and increasing by 10mm-50mm along the radial direction of the desulfurization gun, and the axial length is 500mm-1600mm.

[0021] At the same time, different refractory materials are cast according to the different working environments of different parts of the desulfurization gun. The slag line part 3 of the desulfurization gun adopts aluminum-magnesium refractory materials with excellent corrosion resistance, friction resistance and thermal vibration stability, and other parts are cast and formed with aluminum-silicon refractory materials.

[0022] When pouring with the spray gun, start from the stirring head 5, pour from bottom to top, pass through the gun body 4, and when pouring to the slag line 3, change to wear-resistant aluminum-magnesium refractory material. After pouring the slag line 3, pour aluminum-silicon refractory material. After the desulfurization gun is poured, demoulding and drying can be carried out according to conventional processes.

[0023] The desulfurization gun proposed in the utility model can significantly improve the service life, mainly based on two aspects:

[0024] First, in terms of appearance and structure, the refractory material is thickened at the weak parts to extend the wear-resistant time; second, the refractory material of the weak links is optimized and improved, and aluminum-magnesium refractory is used to improve the ability to resist molten steel penetration. Due to the expansion of the spinelization reaction between alumina and magnesium oxide during use, an integral refractory furnace lining can be formed, which can effectively prevent molten steel from penetrating from the joints between lining bricks into the interior of the bricks, and has excellent slag resistance. Since the spinel formed during use can absorb FeO in the slag to form a solid solution, and Al2O3 reacts with CaO in the slag to form a high melting point CaO-AL2O3 series compound, it plays a role in blocking pores and increasing melt viscosity, thereby achieving the purpose of inhibiting slag penetration.

[0025] Matters not described in detail in this utility model are known technologies.

[0026] The embodiments described above are merely descriptions of preferred implementation modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should fall within the protection scope determined by the claims of the present invention.

Claims

1. A corrosion-resistant and wear-resistant hot metal desulfurization gun, characterized in that: The desulfurization gun includes a gun body, a slag line part and a stirring head; the slag line part is coaxially fixed to the circumferential outer side of the upper part of the gun body; the stirring head is coaxially fixed to the lower end of the gun body; the outer diameter of the slag line part is larger than the outer diameter of the gun body.

2. The corrosion-resistant and wear-resistant hot metal desulfurization gun according to claim 1, characterized in that: The upper end of the gun body is coaxially fixedly connected with a desulfurization clamping part through a flange.

3. The corrosion-resistant and wear-resistant hot metal desulfurization gun according to claim 1, characterized in that: The slag line portion is made of aluminum-magnesia refractory material.

4. The corrosion-resistant and wear-resistant hot metal desulfurization gun according to claim 1, characterized in that: The gun body and the stirring head are made of aluminum silicon refractory material.

5. The corrosion-resistant and wear-resistant hot metal desulfurization gun according to claim 4, characterized in that: The outer circumference of the stirring head is evenly distributed with 2-5 blades.

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