Powder spraying gun

Abstract

The invention discloses a powder spraying gun, and belongs to the technical field of smelting. The powder spraying gun comprises a powder spraying gun core, the front portion of the powder spraying gun core is arranged in a protective sleeve in a penetrating mode, and the protective sleeve comprises an embedded part and a refractory sleeve wrapping the embedded part. The embedded part comprises a base, a plurality of insertion pipe fixing plates are arranged on the base in a penetrating mode, gun core insertion pipes are arranged in the centers of all the insertion pipe fixing plates, and the gun core insertion pipes are connected with the insertion pipe fixing plates. The powder spraying gun can effectively solve the technical problem that raw materials and energy are wasted due to the fact that an existing powder spraying gun is arranged on the molten steel surface, and powder actually sprayed into the position below the molten steel surface is little. According to the powder spraying gun, part of the gun body arranged in the protective sleeve is arranged in molten steel, so that most of powder sprayed by the powder spraying gun can enter the molten steel to react with impurities, the usage amount of the powder is reduced, the smelting cost is reduced, the smelting efficiency is improved, the product quality is guaranteed, the practicability is high, and the application prospect is wide.

Description

Technical Field

[0001] The invention relates to the technical field of smelting, and in particular to a powder spraying gun. Background Art

[0002] In the process of steel smelting, spraying powder into molten steel is an effective means to remove impurities in molten steel and improve the quality of steelmaking. At present, most of the powder spraying guns used for spraying powder into molten steel are fixed on the inner wall of the furnace shell and placed above the molten steel surface. The powder is sprayed out from the gun body under the action of the blowing aid and finally enters below the liquid surface. However, in this process, most of the powder sprayed by the powder spraying gun is intercepted when passing through the liquid surface, and only a small part can enter the molten steel, so it is necessary to increase the amount of raw materials or increase the pressure of the spraying, which wastes raw materials and energy on the one hand, increases the smelting cost, and reduces production efficiency on the other hand, affecting the impurity removal effect. Summary of the invention

[0003] In order to solve the above technical problems, the present invention provides a powder spray gun.

[0004] In a first aspect, the present invention provides a powder spray gun, which is implemented according to the following technical solution.

[0005] A powder spray gun comprises a powder spray gun core, the front part of which is inserted into a protective sleeve, the protective sleeve comprises an embedded part and a refractory sleeve covering the embedded part; the embedded part comprises a base, a plurality of insertion tube fixing plates are inserted into the base, a gun core insertion tube is arranged in the center of all the insertion tube fixing plates, and the gun core insertion tube is connected to the insertion tube fixing plate.

[0006] Furthermore, a plurality of support rods are provided on the outer periphery of the gun core insertion tube, and the support rods are connected to the gun core insertion tube via a connecting block.

[0007] Furthermore, a hanger is connected to the rear of the powder spray gun core.

[0008] Furthermore, the lifting device includes a U-shaped lifting ring, both ends of which are connected to a connecting plate, and the connecting plate is connected to the rear part of the powder spray gun core through a fixing pin.

[0009] In a second aspect, the present invention provides a method for installing a powder spray gun, which is implemented according to the following technical solution.

[0010] A method for installing the powder spray gun, wherein the part of the gun body built into the protective sleeve is arranged below the surface of the molten steel.

[0011] The advantages and beneficial effects of the present invention are:

[0012] The powder spray gun of the present invention is not fixed on the inner wall of the furnace shell above the molten steel surface, but part of the gun body built into the protective sleeve is placed in the molten steel, so that most of the powder sprayed by the powder spray gun can enter the molten steel to react with impurities, thereby reducing the use of powder, reducing smelting costs, and improving smelting efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the structure of the present invention;

[0014] Figure 2 It is a structural schematic diagram of the embedded part of the present invention.

[0015] Among them, 1. powder spray gun core; 2. embedded parts; 21. gun core insertion tube; 22. base; 23. insertion tube fixing plate; 24. support rod; 25. connecting block; 3. refractory sleeve; 4. lifting fixture; 41. U-shaped lifting ring; 42. connecting plate; 43. fixing pin. DETAILED DESCRIPTION

[0016] The present invention is described in detail below with reference to the accompanying drawings and embodiments.

[0017] like Figures 1-2 As shown, a powder spray gun comprises a powder spray gun core 1, a protective cover and a hanger 4. The front part of the powder spray gun core 1 is inserted into the protective cover, and the rear part of the powder spray gun core 1 is connected to the hanger 4.

[0018] The protective sleeve includes an embedded part 2 and a refractory sleeve 3. Specifically, the embedded part 2 includes a base 22, a through hole is formed in the center of the base 22, and a plurality of insert tube fixing plates 23 are symmetrically penetrated around the through hole. Preferably, four insert tube fixing plates 23 are provided. The gun core insertion tube 21 is inserted from the lower end of the insert tube fixing plate 23 into the central space surrounded by the plurality of insert tube fixing plates 23, and the upper end of the gun core insertion tube 21 is spaced a distance from the lower surface of the base 22, the gun core insertion tube 21 is fixedly connected to the insert tube fixing plate 23, and the powder spray gun core 1 is penetrated in the gun core insertion tube 21.

[0019] The present application also symmetrically provides a plurality of support rods 24 on the periphery of the gun core insertion tube 21, and the support rods 24 extend in the same direction as the gun core insertion tube 21. Preferably, four support rods 24 are provided on the periphery of the gun core insertion tube 21, and the support rods 24 may be made of steel bars, thereby increasing the overall mechanical strength of the protective cover. A connecting block 25 is provided between the support rod 24 and the gun core insertion tube 21, and the two ends of the connecting block 25 are respectively connected to the support rod 24 and the gun core insertion tube 21, thereby fixing the support rod 24 to the gun core insertion tube 21. In order to ensure the connection strength between the support rod 24 and the gun core insertion tube 21, a plurality of connecting blocks 25 may be provided between the support rod 24 and the gun core insertion tube 21, and the plurality of connecting blocks 25 are evenly distributed along the extension direction of the support rod 24 and the gun core insertion tube 21.

[0020] The embedded part 2 of the present application is made of metal material, and the refractory sleeve 3 is made of high temperature resistant material, such as corundum, magnesium carbon, etc. In the production process of the protective sleeve, the embedded part 2 can be placed in the mold in advance, and then the refractory sleeve raw material is poured into the mold to the lower surface of the base 22, and the refractory sleeve raw material is filled and wrapped outside the embedded part 2, and an integrated protective sleeve structure is obtained after cooling. The embedded part 2 plays a supporting role in the protective sleeve, thereby maintaining the shape of the protective sleeve and improving the mechanical strength of the protective sleeve.

[0021] The rear of the powder gun core 1 of the present application is also connected to a sling 4, and the setting of the sling 4 can facilitate the installation and transportation of the powder gun core 1. Specifically, the sling 4 includes a U-shaped lifting ring 41, both ends of the U-shaped lifting ring 41 are connected to a connecting plate 42, and two connecting plates 42 are arranged on both sides of the rear of the powder gun core 1, and the connecting plates 42 are connected to the powder gun core 1 through a fixing pin 43.

[0022] The front part of the powder spray gun core 1 of the present application is inserted into a protective sleeve and placed below the surface of the molten steel. The powder enters the powder spray gun core 1 from the rear end thereof and under the action of the blowing aid, most of the powder enters the molten steel to react, thereby improving the reaction efficiency, reducing the smelting cost and ensuring the product quality.

[0023] The applicant declares that the above is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Those skilled in the art should understand that any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present invention shall fall within the protection scope and disclosure scope of the present invention.

Claims

1. A powder spray gun, comprising a powder spray gun core (1), characterized in that: The front part of the powder spray gun core (1) is inserted into a protective sleeve, and the protective sleeve includes an embedded part (2) and a refractory sleeve (3) covering the embedded part (2); the embedded part (2) includes a base (22), and a plurality of insertion tube fixing plates (23) are inserted into the base (22), and a gun core insertion tube (21) is provided in the center of all the insertion tube fixing plates (23), and the gun core insertion tube (21) is connected to the insertion tube fixing plate (23).

2. A powder spray gun according to claim 1, characterized in that: A plurality of support rods (24) are also provided on the outer periphery of the gun core insertion tube (21), and the support rods (24) are connected to the gun core insertion tube (21) via a connecting block (25).

3. A powder spray gun according to claim 1 or 2, characterized in that: The rear part of the powder spray gun core (1) is connected with a hanger (4).

4. A powder spray gun according to claim 3, characterized in that: The lifting device (4) comprises a U-shaped lifting ring (41), both ends of which are connected to a connecting plate (42), and the connecting plate (42) is connected to the rear of the powder spray gun core (1) via a fixing pin (43).

5. A method for installing a powder spray gun according to any one of claims 1 to 4, characterized in that: The part of the gun body built into the protective sleeve is arranged below the steel liquid surface.

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