Coke adding device for blast furnace smelting tuyere

Abstract

The utility model discloses a blast furnace smelting tuyere coke adding device which comprises an air inlet pipe, a coke bin and an air inlet gun, one side of the coke bin is provided with a first pipeline, one side of the first pipeline is connected with a first blow pipe joint, one side of the first blow pipe joint is connected with a second pipeline, and the other end of the second pipeline is connected with a second blow pipe joint; according to the coke feeding device, the heat-resisting ball valve is opened, coke accumulated on the surface of the heat-resisting ball valve can enter the feeding pipe through the conveying pipe, gas can pressurize the interior of the coke bin all the time, and the coke can be fed into the feeding pipe all the time; high-pressure gas is conveyed into the feeding pipe through the high-pressure spray head, the high-pressure gas can push coke in the feeding pipe to move, the coke is conveyed into the blast furnace hearth, then automatic coke conveying can be achieved, then the heat of the blast furnace hearth is directly increased, a second filter screen can be controlled through a bolt, and the coke conveying efficiency is improved. And the second filter screen is cleaned or replaced.

Description

Technical Field

[0001] The utility model relates to the technical field of blast furnace smelting, in particular to a blast furnace smelting tuyere coking device. Background Art

[0002] During blast furnace production, iron ore, coke, and slag-making flux (limestone) are loaded from the top of the furnace, and preheated air is blown in from the tuyere located at the bottom of the furnace along the furnace periphery. At high temperatures, the carbon in the coke (some blast furnaces also spray auxiliary fuels such as coal powder, heavy oil, and natural gas) burns with the oxygen in the blown air to generate carbon monoxide and hydrogen, which remove oxygen from the iron ore during the rising process in the furnace, thereby reducing iron. The molten iron is released from the iron mouth.

[0003] In the existing process of using blast furnace for smelting, most of the coke is filled into the blast furnace hearth manually; however, since the coke needs to be transported manually, if there is less coke inside the blast furnace hearth, the manual operation needs to go to the front of the coke and transport the coke to the inside of the blast furnace hearth, so that when the manual operation goes to the front of the coke, the remaining coke inside the blast furnace hearth may not be found. During this period of time, after the coke inside the blast furnace hearth is burned out, the temperature inside the blast furnace hearth will decrease, so that the qualified rate of pig iron will be reduced in the future, and the blast furnace hearth and the hearth will freeze, which is not convenient for use. In view of this, we introduce a blast furnace smelting tuyere coke adding device. Utility Model Content

[0004] The utility model aims to provide a blast furnace smelting tuyere coking device to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a blast furnace smelting tuyere coking device, comprising: an air inlet pipe, a coke bin and an air inlet gun, a first pipe is arranged on one side of the coke bin, a first blowpipe joint is connected to one side of the first pipe, a thread is arranged inside the first blowpipe joint, and a control handle is arranged on the surface of the first blowpipe joint, a second pipe is connected to one side of the first blowpipe joint, a second blowpipe joint is connected to the other end of the second pipe, a thread is arranged inside the second blowpipe joint, and a control handle is arranged on the surface of the second blowpipe joint, a first filter is arranged inside the second pipe, and a first filter is arranged on the first blowpipe joint. The filter can filter the external air, the second blow pipe joint is connected to the bottom of the air inlet pipe, the surface of the air inlet pipe is connected to a valve, the valve can control the opening and closing of the air inlet pipe, the bottom of the coke bin is connected to a channel, the bottom of the channel is connected to a conveying pipe, the bottom of the conveying pipe is connected to a feed pipe, one end of the feed pipe is connected to a blast furnace hearth, the coke inside the coke bin will pass through the channel, the conveying pipe and the feed pipe into the interior of the blast furnace hearth, a filtering mechanism is provided at one end of the air inlet gun, the gas is filtered through the second filter of the filtering mechanism, so that the filtered gas pushes the coke to move.

[0006] Preferably, the filtering mechanism includes a gooseneck tube, and a third pipe is connected to the surface of the air inlet gun, and the third pipe and the air inlet gun are integrally formed. The gooseneck tube is connected to the top of the third pipe, and the second filter is arranged inside the gooseneck tube. The second filter is convenient for filtering the external air. A limiting groove for slidingly connecting the second filter is opened inside the gooseneck tube, and the limiting groove and the gooseneck tube are integrally formed, and the limiting groove can limit the movement of the second filter. A bolt is connected to one side of the gooseneck tube, and one end of the bolt passes through the gooseneck tube and is connected to the inside of the second filter, and the bolt can fix the second filter inside the gooseneck tube.

[0007] Preferably, one end of the air inlet gun is connected to a high-pressure nozzle, and the high-pressure nozzle is connected to the inside of the feed pipe. The gas will be pressurized when passing through the high-pressure nozzle, allowing the gas to be blown into the inside of the feed pipe.

[0008] Preferably, the interior of the channel is connected with a heat-resistant ball valve for controlling the flow of coke. The heat-resistant ball valve can be opened to allow the coke to flow, and closed to prevent the coke from flowing.

[0009] Preferably, a cover plate is hinged on the top of the coke bin, and a handle is connected to the surface of the cover plate. If blockage occurs inside the coke bin, the cover plate can be driven to rotate on the top of the coke bin by the handle, so that the coke inside the coke bin can be cleaned. A first pressure gauge is connected to the top of the cover plate, and the first pressure gauge is convenient for detecting the air inside the coke bin.

[0010] Preferably, a second pressure gauge is connected to the surface of the intake pipe, and the second pressure gauge detects the gas inside the intake pipe. A pressurizing chamber is opened inside the first pipe, and a pneumatic booster pump is arranged inside the pressurizing chamber, thereby pressurizing the gas.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] (1) Through the first filter screen inside the second pipe, the impurities in the air can be filtered, allowing the air to enter the first pipe in a clean state, and the filtered air can pass through the pressurized chamber to allow the pressurized air to enter the coke bin. At this time, the heat-resistant ball valve is opened to allow the coke accumulated on the surface of the heat-resistant ball valve to enter the feed pipe through the conveying pipe, and the gas inside the air intake pipe will always pressurize the inside of the coke bin, so that the coke can always be fed into the feed pipe;

[0013] (2) The air can be filtered by the second filter screen arranged inside the gooseneck tube. The filtered air will pass through the high-pressure nozzle to deliver high-pressure gas to the inside of the feed pipe, so that the high-pressure gas will push the coke inside the feed pipe to move, so that the coke is delivered to the inside of the blast furnace hearth. The gas inside the air intake pipe and the gas inside the gooseneck tube are always running, so that the coke can be automatically transported, and the heat of the blast furnace hearth can be directly increased. It can be used in blast furnaces of different specifications. It is simple to make, safe and reliable. It can quickly increase the furnace temperature of the blast furnace hearth to ensure the qualified rate of pig iron, and at the same time, it can avoid the freezing of the blast furnace hearth and the hearth;

[0014] (3) Unscrew the inside of the second filter and the gooseneck tube by screwing out the bolts, lift up the second filter, and limit the second filter in the limit groove. After the second filter is taken out, the dust on the surface can be cleaned or the second filter can be replaced, which is more convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 This is a schematic diagram of the structure of the gooseneck tube in a front section of the utility model;

[0017] Figure 3 It is a structural schematic diagram of the second filter screen and bolts of the utility model when they are three-dimensionally decomposed.

[0018] In the figure: 1. air inlet pipe; 2. second pressure gauge; 3. valve; 4. second blow pipe joint; 5. second pipeline; 6. first filter; 7. first blow pipe joint; 8. first pipeline; 9. pressurizing chamber; 10. handle; 11. first pressure gauge; 12. cover plate; 13. coke bin; 14. passage; 15. heat-resistant ball valve; 16. conveying pipe; 17. feed pipe; 18. blast furnace hearth; 19. high-pressure nozzle; 20. air inlet gun; 21. third pipeline; 22. gooseneck pipe; 23. second filter; 24. limit groove; 25. bolt. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] See also Figure 1-3 The utility model provides a technical solution: a blast furnace smelting tuyere coke adding device, comprising: an air inlet pipe 1, a coke bin 13 and an air inlet gun 20, a first pipeline 8 is arranged on one side of the coke bin 13, a first blowpipe joint 7 is connected to one side of the first pipeline 8, a second pipeline 5 is connected to one side of the first blowpipe joint 7, a second blowpipe joint 4 is connected to the other end of the second pipeline 5, a first filter screen 6 is arranged inside the second pipe 5, the second blowpipe joint 4 is connected to the bottom of the air inlet pipe 1, a valve 3 is connected to the surface of the air inlet pipe 1, a channel 14 is connected to the bottom of the coke bin 13, a conveying pipe 16 is connected to the bottom of the channel 14, a feed pipe 17 is connected to the bottom of the conveying pipe 16, one end of the feed pipe 17 is connected to a blast furnace hearth 18, a filtering mechanism is arranged on one end of the air inlet gun 20, and the gas is filtered by the second filter screen 23 of the filtering mechanism so that the filtered gas pushes the coke to move.

[0021] The filtering mechanism includes a gooseneck 22, the surface of the air inlet gun 20 is connected to a third pipe 21, the gooseneck 22 is connected to the top of the third pipe 21, the second filter 23 is arranged inside the gooseneck 22, and a limiting groove 24 for slidingly connecting the second filter 23 is opened inside the gooseneck 22. A bolt 25 is connected to one side of the gooseneck 22, and one end of the bolt 25 passes through the gooseneck 22 and is connected to the inside of the second filter 23.

[0022] One end of the air inlet gun 20 is connected to a high-pressure nozzle 19 , and the high-pressure nozzle 19 is connected to the inside of the feed pipe 17 . The gas will be pressurized when passing through the high-pressure nozzle 19 , so that the gas is blown into the inside of the feed pipe 17 .

[0023] The interior of the channel 14 is connected with a heat-resistant ball valve 15 for controlling the flow of coke. The heat-resistant ball valve 15 can be opened to allow the coke to flow, and the heat-resistant ball valve 15 can be closed to prevent the coke from flowing.

[0024] A cover plate 12 is hingedly connected to the top of the coke bin 13, and a handle 10 is connected to the surface of the cover plate 12. If the inside of the coke bin 13 is blocked, the cover plate 12 is driven by the handle 10 to rotate on the top of the coke bin 13, so that the coke inside the coke bin 13 can be cleaned. A first pressure gauge 11 is connected to the top of the cover plate 12, and the first pressure gauge 11 is convenient for detecting the air inside the coke bin 13.

[0025] The surface of the intake pipe 1 is connected to a second pressure gauge 2 for detecting the gas inside the intake pipe 1. A pressurizing chamber 9 is provided inside the first pipe 8, and a pneumatic booster pump is arranged inside the pressurizing chamber 9, thereby pressurizing the gas.

[0026] Specifically, when in use, the coke is placed inside the coke bin 13, and the coke inside the coke bin 13 will flow to the inside of the channel 14 and be located at the top of the heat-resistant ball valve 15. At this time, the external pipeline is aligned with the air inlet pipe 1. At this time, the valve 3 is opened to allow the external air to enter the air inlet pipe 1 and the second pipe 5. Since the second pipe 5 is provided with a first filter 6, the impurities in the air can be filtered, allowing the air to enter the first pipe 8 in a clean state. The filtered air passes through the pressurized chamber 9 to allow the pressurized air to enter the coke bin 13. At this time, the heat-resistant ball valve 15 is opened to allow the coke accumulated on the surface of the heat-resistant ball valve 15 to enter the feed pipe 17 through the conveying pipe 16. The gas inside the air inlet pipe 1 will always pressurize the inside of the coke bin 13, so that the coke can always be fed into the feed pipe 17.

[0027] At this time, the external pipeline is connected to the gooseneck tube 22 to allow the external air to enter the third pipeline 21 and the air inlet gun 20, and the second filter 23 arranged inside the gooseneck tube 22 can filter the air, so that the external air can enter the third pipeline 21 and the air inlet gun 20 in a clean state. At this time, the filtered air will pass through the high-pressure nozzle 19 to transport high-pressure gas to the inside of the feed pipe 17, so that the high-pressure gas will push the coke inside the feed pipe 17 to move, so that the coke is transported to the inside of the blast furnace hearth 18. The gas inside the air intake pipe 1 and the gas inside the gooseneck tube 22 are always running, so as to realize automatic coke transportation, thereby directly increasing the heat of the blast furnace hearth 18, and can be used in blast furnaces of different specifications. It is simple to make, safe and reliable, and can quickly increase the furnace temperature of the blast furnace hearth 18 to ensure the qualified rate of pig iron, and at the same time, it can avoid the freezing accident of the blast furnace hearth 18 and the hearth.

[0028] When the second filter 23 is filtered for a long time, the second filter 23 may be blocked. At this time, unscrew the bolt 25 and let the bolt 25 unscrew the inside of the second filter 23 and the inside of the gooseneck tube 22. At this time, lift the second filter 23 upwards and let the second filter 23 move inside the limiting groove 24. The limiting groove 24 can limit the movement of the second filter 23. At this time, the second filter 23 can be taken out to clean the dust on the surface or replace the second filter 23, which is more convenient to use.

[0029] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A blast furnace smelting tuyere coking device, comprising: An air inlet pipe (1), a coke bin (13) and an air inlet gun (20), characterized in that a first pipe (8) is provided on one side of the coke bin (13), a first blow pipe joint (7) is connected to one side of the first pipe (8), a second pipe (5) is connected to one side of the first blow pipe joint (7), a second pipe (5) is connected to the other end of the second pipe (5) with a second blow pipe joint (4), a first filter screen (6) is provided inside the second pipe (5), and the second blow pipe joint (4) is connected to the bottom of the air inlet pipe (1). The surface of the air inlet pipe (1) is connected to a valve (3), the bottom of the coke bin (13) is connected to a channel (14), the bottom of the channel (14) is connected to a delivery pipe (16), the bottom of the delivery pipe (16) is connected to a feed pipe (17), one end of the feed pipe (17) is connected to a blast furnace hearth (18), and one end of the air inlet gun (20) is provided with a filtering mechanism, and the gas is filtered through a second filter screen (23) of the filtering mechanism so that the filtered gas pushes the coke to move.

2. A blast furnace smelting tuyere coking device according to claim 1, characterized in that: The filtering mechanism includes a gooseneck tube (22), the surface of the air inlet gun (20) is connected to a third pipe (21), the gooseneck tube (22) is connected to the top of the third pipe (21), the second filter screen (23) is arranged inside the gooseneck tube (22), and the inside of the gooseneck tube (22) is provided with a limiting groove (24) for slidingly connecting the second filter screen (23), one side of the gooseneck tube (22) is connected to a bolt (25), and one end of the bolt (25) passes through the gooseneck tube (22) and is connected to the inside of the second filter screen (23).

3. A blast furnace smelting tuyere coking device according to claim 2, characterized in that: One end of the air inlet gun (20) is connected to a high-pressure nozzle (19), and the high-pressure nozzle (19) is connected to the inside of the feed pipe (17).

4. A blast furnace smelting tuyere coking device according to claim 1, characterized in that: The interior of the passage (14) is connected to a heat-resistant ball valve (15) for controlling the flow of coke.

5. A blast furnace smelting tuyere coking device according to claim 1, characterized in that: A cover plate (12) is hingedly connected to the top of the coke bin (13), a handle (10) is connected to the surface of the cover plate (12), and a first pressure gauge (11) is connected to the top of the cover plate (12).

6. A blast furnace smelting tuyere coking device according to claim 1, characterized in that: The surface of the air inlet pipe (1) is connected to a second pressure gauge (2), and a pressurizing chamber (9) is provided inside the first pipe (8).

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