Converter injection system

Abstract

The utility model provides a converter injection system which comprises a first injection tank, an oxygen conveying main pipe, a powder conveying pipe and an oxygen lance, and further comprises an oxygen conveying branch pipe, a powder injection lance, an oxygen lance lifting device for driving the oxygen lance to lift and an injection lance lifting device for driving the powder injection lance to lift, the first injection tank is communicated with the powder conveying pipe, the oxygen conveying main pipe is communicated with the oxygen conveying branch pipe, the oxygen conveying branch pipe is communicated with the first injection tank, the powder conveying pipe is communicated with the powder injection gun, and the oxygen conveying main pipe is further communicated with the oxygen gun. The service life of the oxygen lance in the prior art is not affected.

Description

Technical Field

[0001] The utility model relates to the technical field of converter steelmaking, in particular to a converter blowing system. Background Art

[0002] Achieving efficient dephosphorization, reducing consumption of smelting auxiliary materials and reducing slag output through oxygen lance powder spraying is one of the key factors to further improve various indicators of the converter. For the production of clean steel, ultra-low carbon steel and low-phosphorus steel, the market demand for converter oxygen lance powder spraying technology is increasing.

[0003] In the prior art, in order to spray dephosphorization powder on the top of the converter, oxygen lance is usually used to spray powder at the same time. However, since the time required for oxygen spraying and powder spraying in converter steelmaking is different, the working time of the spray pipe in the oxygen lance becomes longer, which shortens the service life of the oxygen lance.

[0004] Therefore, it is necessary to improve the existing converter injection system to increase the life of the oxygen lance. Utility Model Content

[0005] The utility model aims to provide a converter injection system to solve the problem of low oxygen lance life in the existing converter injection system.

[0006] In order to solve the above technical problems, the utility model provides a converter blowing system, including a first blowing tank, an oxygen delivery main pipe, a powder delivery pipe and an oxygen gun, and also including an oxygen delivery branch pipe, a powder blowing gun, an oxygen gun lifting device for driving the oxygen gun to rise and fall, and a blowing gun lifting device for driving the powder blowing gun to rise and fall. The first blowing tank is connected to the powder delivery pipe, the oxygen delivery main pipe is connected to the oxygen delivery branch pipe, the oxygen delivery branch pipe is connected to the first blowing tank, the powder delivery pipe is connected to the powder blowing gun, and the oxygen delivery main pipe is also connected to the oxygen gun.

[0007] Optionally, a second blowing tank is further included, and the second blowing tank is connected to the first blowing tank.

[0008] Optionally, the second blowing tank is a weighing tank.

[0009] Optionally, it further includes a first valve group and a second valve group, wherein the first valve group is arranged on the oxygen delivery main pipe, and the second valve group is arranged on the oxygen delivery branch pipe.

[0010] Optionally, a blowing gun rotating device for driving the oxygen gun to rotate is also included.

[0011] Optionally, a spray gun rotating device for driving the powder spray gun to rotate is also included.

[0012] Optionally, the powder spray gun includes an air-powder spray pipe, a water inlet pipe and a drain pipe, the water inlet pipe is arranged on the outer peripheral surface of the air-powder spray pipe, the drain pipe is connected to the water inlet pipe, the air-powder spray pipe is connected to the powder conveying pipe, and the air-powder spray pipe has a spray outlet.

[0013] Optionally, the water inlet pipe is sleeved on the air-powder spraying main pipe, the air-powder spraying main pipe forms an air-powder cavity, the water inlet pipe and the air-powder spraying main pipe form a water inlet cavity, and the water inlet cavity is connected to the drain pipe.

[0014] Optionally, the drain pipe is sleeved on the water inlet pipe, the drain pipe and the water inlet pipe form a drainage cavity, and the water inlet cavity is communicated with the drainage cavity.

[0015] Optionally, the diameter of the air-powder chamber gradually decreases towards the ejection port.

[0016] The utility model provides a converter blowing system, which has the following beneficial effects:

[0017] Since the first blowing tank is connected to the powder conveying pipe, the oxygen conveying main pipe is connected to the oxygen conveying branch pipe, the oxygen conveying branch pipe is connected to the first blowing tank, and the powder conveying pipe is connected to the powder blowing gun, the oxygen in the oxygen conveying main pipe can be conveyed to the first blowing tank through the oxygen conveying branch pipe, and the powder in the first blowing tank can be conveyed to the powder conveying pipe, so that the oxygen and the powder are mixed in the first blowing tank and then sprayed out by the powder blowing gun, thereby realizing the output of the powder; since the oxygen conveying main pipe is also connected to the oxygen gun, the oxygen can be output through the oxygen gun; since the powder blowing gun is used to spray powder above the converter and the oxygen gun is used to spray oxygen above the converter, it is possible to spray powder and oxygen from above the converter; since the oxygen gun for spraying oxygen and the powder blowing gun for spraying powder are independent of each other, they can be used within their respective working time periods, thereby ensuring the service life of the oxygen gun. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a plan view of the converter injection system in the embodiment of the utility model;

[0019] Figure 2 It is a cross-sectional view of the converter injection system in the embodiment of the utility model;

[0020] Figure 3 It is a longitudinal section view of the converter injection system in the embodiment of the utility model;

[0021] Figure 4 This is a front view of a powder spraying gun of a converter spraying system in an embodiment of the utility model;

[0022] Figure 5 yes Figure 4 A local enlarged schematic diagram at point A.

[0023] Description of reference numerals:

[0024] 100-first spray tank; 200-oxygen delivery main pipe; 300-oxygen delivery branch pipe; 400-powder delivery pipe; 500-powder spray gun; 510-gas-powder spray main pipe; 511-spray outlet; 512-gas-powder chamber; 520-water inlet pipe; 530-drain pipe; 540-water inlet chamber; 550-drain chamber; 600-oxygen gun; 700-second spray tank; 810-spray gun lifting device; 820-spray gun rotating device; 900-converter. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0026] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0028] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the utility model product is usually placed when in use, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0029] In addition, the terms "horizontal", "vertical" and the like do not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0030] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] refer to Figure 1 , Figure 2 and Figure 3 , Figure 1 This is a plan view of the converter injection system in the embodiment of the utility model. Figure 2 This is a cross-sectional view of the converter injection system in the embodiment of the utility model. Figure 3 It is a longitudinal sectional view of the converter injection system in an embodiment of the utility model. This embodiment provides a converter injection system, including a first injection tank 100, an oxygen delivery main pipe 200, an oxygen delivery branch pipe 300, a powder delivery pipe 400, a powder injection gun 500, an oxygen gun 600, an oxygen gun lifting device for driving the oxygen gun 600 to rise and fall, and a injection gun lifting device 810 for driving the powder injection gun 500 to rise and fall. The first injection tank 100 is connected to the powder delivery pipe 400, the oxygen delivery main pipe 200 is connected to the oxygen delivery branch pipe 300, the oxygen delivery branch pipe 300 is connected to the first injection tank 100, the powder delivery pipe 400 is connected to the powder injection gun 500, and the oxygen delivery main pipe 200 is also connected to the oxygen gun 600.

[0032] Since the first blowing tank 100 is connected to the powder conveying pipe 400, the oxygen conveying main pipe 200 is connected to the oxygen conveying branch pipe 300, the oxygen conveying branch pipe 300 is connected to the first blowing tank 100, and the powder conveying pipe 400 is connected to the powder blowing gun 500, the oxygen in the oxygen conveying main pipe 200 can be conveyed to the first blowing tank 100 through the oxygen conveying branch pipe 300, and the powder in the first blowing tank 100 can be conveyed to the powder conveying pipe 400, so that the oxygen and the powder are mixed at the lower part of the first blowing tank 100, and then sprayed out by the powder blowing gun 500, thereby realizing the output of the powder; since the oxygen conveying main pipe 200 is also connected to the oxygen gun 600, the oxygen can be output through the oxygen gun 600; since the lifting devices of the oxygen gun 600 for spraying oxygen and the powder blowing gun 500 for spraying powder are independent, they can be used within their respective working time periods, and the service life of the oxygen gun 600 can be guaranteed.

[0033] The converter blowing system also includes a second blowing tank 700, which is connected to the first blowing tank 100. In this way, a primary buffer can be formed by the second blowing tank 700 and the first blowing tank 100 to ensure sufficient raw material supply for continuous smelting of the converter.

[0034] Preferably, the second blowing tank 700 is a weighing tank.

[0035] The converter injection system further includes a first valve group and a second valve group. The first valve group is disposed on the oxygen delivery main pipe 200 , and the second valve group is disposed on the oxygen delivery branch pipe 300 .

[0036] The converter injection system further includes an injection lance rotating device for driving the oxygen lance 600 to rotate.

[0037] The converter injection system further includes an injection gun rotating device 820 for driving the powder injection gun 500 to rotate.

[0038] refer to Figure 4 and Figure 5 , Figure 4 This is a front view of a powder spraying gun 500 of a converter spraying system in an embodiment of the utility model. Figure 5 yes Figure 4 In the partially enlarged schematic diagram at A, the powder spray gun 500 includes an air-powder spraying pipe 510, a water inlet pipe 520 and a drain pipe 530, the water inlet pipe 520 is arranged on the outer peripheral surface of the air-powder spraying pipe 510, the drain pipe 530 is connected to the water inlet pipe 520, the air-powder spraying pipe 510 is connected to the powder conveying pipe 400, and the air-powder spraying pipe 510 has a spray outlet 511.

[0039] Preferably, the water inlet pipe 520 is sleeved on the gas-powder spraying main pipe 510, the gas-powder spraying main pipe 510 forms a gas-powder cavity 512, the water inlet pipe 520 and the gas-powder spraying main pipe 510 form a water inlet cavity 540, and the water inlet cavity 540 is connected to the drain pipe 530. This can improve the cooling effect.

[0040] Preferably, the drain pipe 530 is sleeved on the water inlet pipe 520, the drain pipe 530 and the water inlet pipe 520 form a drain cavity 550, and the water inlet cavity 540 is communicated with the drain cavity 550. In this way, the cooling effect can be further improved.

[0041] Preferably, the diameter of the gas-powder chamber 512 gradually decreases toward the ejection port 511 , so that the gas-powder can be ejected at a high speed.

[0042] In this embodiment, the first blowing tank 100, the oxygen delivery main pipe 200, the oxygen delivery branch pipe 300, the powder delivery pipe 400, and the second blowing tank 700 are located on a high-level silo platform or a weighing silo platform of the high-rise frame of the converter 900.

[0043] The above description is only a description of the preferred embodiment of the utility model, and is not any limitation on the scope of the utility model. Any changes and modifications made by ordinary technicians in the field of the utility model based on the above disclosure shall fall within the scope of protection of the claims.

Claims

1. A converter injection system, comprising a first injection tank, an oxygen delivery pipe, a powder delivery pipe and an oxygen gun, characterized in that: It also includes an oxygen delivery branch pipe, a powder blowing gun, an oxygen gun lifting device for driving the oxygen gun to rise and fall, and a blowing gun lifting device for driving the powder blowing gun to rise and fall. The first blowing tank is connected to the powder delivery pipe, the oxygen delivery main pipe is connected to the oxygen delivery branch pipe, the oxygen delivery branch pipe is connected to the first blowing tank, the powder delivery pipe is connected to the powder blowing gun, and the oxygen delivery main pipe is also connected to the oxygen gun.

2. The converter injection system according to claim 1, characterized in that: It also includes a second blowing tank, which is communicated with the first blowing tank.

3. The converter injection system according to claim 2, characterized in that: The second spray tank is a weighing tank.

4. The converter injection system according to claim 1, characterized in that: It also includes a first valve group and a second valve group, wherein the first valve group is arranged on the oxygen delivery main pipe, and the second valve group is arranged on the oxygen delivery branch pipe.

5. The converter injection system according to claim 1, characterized in that: It also includes a blowing gun rotating device for driving the oxygen gun to rotate.

6. The converter injection system according to claim 1, characterized in that: It also includes a spray gun rotating device for driving the powder spray gun to rotate.

7. The converter injection system according to claim 1, characterized in that: The powder spray gun includes an air-powder spray pipe, a water inlet pipe and a drain pipe, wherein the water inlet pipe is arranged on the outer peripheral surface of the air-powder spray pipe, the drain pipe is connected with the water inlet pipe, the air-powder spray pipe is connected with the powder conveying pipe, and the air-powder spray pipe has a spray outlet.

8. The converter injection system according to claim 7, characterized in that: The water inlet pipe is sleeved on the air-powder spraying main pipe, the air-powder spraying main pipe is formed with an air-powder cavity, the water inlet pipe and the air-powder spraying main pipe form a water inlet cavity, and the water inlet cavity is communicated with the drain pipe.

9. The converter injection system according to claim 8, characterized in that: The drain pipe is sleeved on the water inlet pipe, the drain pipe and the water inlet pipe form a drain cavity, and the water inlet cavity is communicated with the drain cavity.

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