Blast furnace smelting device with low fuel ratio

Abstract

The utility model relates to the technical field of metal smelting, and discloses a blast furnace smelting device with a low fuel ratio. The blast furnace smelting device with the low fuel ratio comprises a blast furnace body, and an equipment feeding and screening mechanism is installed above the blast furnace body. The feeding hopper is arranged above the blast furnace body, the separation net and the cutting device are respectively arranged in the feeding hopper, a fuel device enters the feeding hopper, the cutting device and the separation net are arranged to subdivide and screen the fuel, and the cut fuel can increase the contact area of equipment, so that the cutting efficiency of the equipment is improved, and the service life of the equipment is prolonged. The separation net separates the fuel which does not reach the standard after crushing and continuously crushes the fuel, and the dust collection device is arranged on one side of the outer part of the feeding hopper and is connected with the lower part of the feeding hopper through the discharge pipe, so that the power of the dust collection device is reduced, and the dust collection device is more energy-saving and environment-friendly. And dust floating on the lower portion in the feeding hopper is sucked in through the discharging pipe, the screening efficiency is ensured, and the powder is discharged into the furnace.

Description

Technical Field

[0001] The utility model relates to the technical field of metal smelting, in particular to a blast furnace smelting device with a low fuel ratio. Background Technique

[0002] A blast furnace is a device for ironmaking. It is shaped like a tall tower and is filled with a furnace lining and refractory materials inside. The role of the blast furnace in the ironmaking process is to load raw materials such as iron ore, coal, and coke into the furnace through high-temperature heating, and reduce iron oxides to iron through a reduction reaction. This process is an important link in modern steel production. Although many ironmaking methods have been researched and developed in various countries around the world, blast furnace ironmaking is still the main method of modern ironmaking due to its relatively simple process, large output, high labor productivity, low energy consumption, etc. Its output accounts for more than 95% of the total world pig iron output.

[0003] There is a prior Chinese utility model patent with the reference publication number: CN214115601, which discloses a blast furnace feeding device for smelting, belonging to the technical field of smelting feeding. In this technical solution, it includes a machine body. The bottom of the inner wall of the machine body is fixedly connected to the bottom of a spring. The top of the spring is fixedly connected to the bottom of a material receiving plate. The left side of the material receiving plate is fixedly connected to the right side of a turbine. The turbine is threadedly connected to a worm. The bottom of the worm is fixedly connected to the top of a bevel gear A. The bottom of the bevel gear A is rotatably connected to the bottom of the inner wall of the machine body. Raw materials are fed into the transmission device through a feeding hole. The transmission device pours the raw materials onto the material receiving plate. When a certain amount of raw materials is accumulated, the material receiving plate presses down, driving the turbine to press down, causing the worm to rotate. The worm drives a bevel gear B to rotate through the bevel gear A, thereby causing a threaded rod to rotate, and the bolt drives a push plate to move to the right, pushing the raw materials on the material receiving plate into the discharging hole to achieve the function of automatic discharging.

[0004] Based on the retrieval of the above patent and the combination with the equipment in the prior art, it is found that during the processing of iron ore, coal and other items by the blast furnace, a large amount of fuel is consumed excessively, resulting in too high costs during material smelting, thereby increasing the economic cost. The existence of these problems affects the use of the device. Content of the Utility Model

[0005] (I) Technical Problems to be Solved

[0006] In view of the deficiencies of the prior art, the utility model provides a blast furnace smelting device with a low fuel ratio, which has the advantages of sufficient fuel ratio, etc., and solves the above technical problems.

[0007] (II) Technical Solution

[0008] To achieve the above object, the present utility model provides the following technical solutions: A blast furnace smelting device with a low fuel ratio, including a blast furnace body, an equipment feeding and screening mechanism is installed above the blast furnace body, and a fuel reasonable discharge mechanism is installed above the interior of the blast furnace body. The equipment feeding and screening mechanism includes: a feeding hopper installed above the blast furnace body, an isolation net is installed below the interior of the feeding hopper, and a cutting device for fuel cutting is installed above the isolation net, and a motor is installed above the cutting device. Feed inlets are symmetrically installed on both sides of the motor, and a dust suction device for sucking pulverized coal is installed on one side of the exterior of the feeding hopper, and a discharge pipe penetrates through the interior of the dust suction device;

[0009] The fuel reasonable discharge mechanism includes: a coal injection gun installed above the interior of the blast furnace body, a transportation pipe is connected below the coal injection gun, and a pneumatic pipe for moving up and down is connected in the middle of the transportation pipe, and a coal injection nozzle for fuel ejection is installed at the bottom of the transportation pipe. A driving device is connected to one side of the pneumatic pipe.

[0010] As a preferred technical solution of the present utility model, an exhaust pipe is installed on one side below the feeding hopper, a connecting device is connected above the coal injection gun, and the exhaust pipe is located on one side of the connecting device; The coal injection gun ejects the fuel evenly.

[0011] As a preferred technical solution of the present utility model, an equipment pipe is connected to the exterior of the blast furnace body, a detection device is installed at one end of the equipment pipe, and a switch is installed below the detection device, and a pressure discharge pipe is installed on one side of the switch; The pressure discharge pipe discharges the high pressure inside the blast furnace body.

[0012] As a preferred technical solution of the present utility model, a connection relationship is formed between the feeding hopper and the blast furnace body through a connecting device, and a connection relationship is formed between the dust suction device and the feeding hopper through the discharge pipe, and the opening of the feeding hopper is in the shape of being larger at the top and smaller at the bottom; The feeding hopper processes the fuel.

[0013] As a preferred technical solution of the present utility model, a connecting pipe is provided at one end of the transportation pipe, and a movable connection relationship is formed between the coal injection nozzle and the driving device through the pneumatic pipe, and the coal injection nozzle is located in the upper middle part of the interior of the blast furnace body; The coal injection nozzle ejects the fuel.

[0014] As a preferred technical solution of the present utility model, the equipment pipe is installed behind the switch at the same time, and an intercommunication structure is formed between the pressure discharge pipe and the equipment pipe, and the switch is annularly installed on the exterior of the blast furnace body; The equipment pipe conducts heat out.

[0015] As a preferred technical solution of the present utility model, the blast furnace body is in a cylindrical shape, and a base is installed below the blast furnace body; The blast furnace body heats the equipment through high temperature.

[0016] Compared with the prior art, the utility model provides a blast furnace smelting device with a low fuel ratio, which has the following beneficial effects:

[0017] 1. In the utility model, a feed hopper is installed above the blast furnace body. An isolation net and a cutting device are respectively installed inside the feed hopper. The fuel device enters the inside of the feed hopper. The cutting device and the isolation net are used to subdivide and screen the fuel. The cut fuel will increase the contact area of the equipment, thus maximizing the value of the fuel. The isolation net isolates the fuel that does not meet the crushing standard and continues to crush it. And a dust suction device is arranged on one side outside the feed hopper. The dust suction device is connected to the lower part of the feed hopper through a discharge pipe. The power of the dust suction device is turned down, and the floating dust under the feed hopper inside the feed hopper is sucked in through the discharge pipe to ensure the screening efficiency, exclude powder from entering the furnace, and at the same time avoid coke larger than 5mm from entering the return ore, resulting in fuel waste;

[0018] 2. In the utility model, a coal injection gun is installed above the inside of the blast furnace body. The coal injection gun is connected through a transport pipe, a pneumatic pipe and a coal injection nozzle. The coal injection gun discharges the processed fuel device. And a driving device is arranged on one side of the pneumatic pipe. The driving device makes the pneumatic pipe move up and down to carry out coal injection processing on the blast furnace body at different heights. The coal injection processing can evenly distribute the fuel inside the blast furnace body, make the fuel fully mixed, increase the efficacy of the fuel, and realize low fuel ratio processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic diagram of the overall structure of the utility model;

[0020] Figure 2 is a schematic diagram of the feed hopper assembly of the structure of the utility model;

[0021] Figure 3 is a schematic diagram of the coal injection gun assembly of the structure of the utility model;

[0022] Figure 4 is a schematic diagram of the blast furnace body assembly of the structure of the utility model;

[0023] Among them: 1. Blast furnace body; 11. Equipment pipe; 12. Detection device; 13. Switch; 14. Pressure discharge pipe; 2. Base; 3. Exhaust pipe; 4. Feed hopper; 41. Isolation net; 42. Cutting device; 43. Feed inlet; 44. Motor; 45. Dust suction device; 46. Discharge pipe; 5. Coal injection gun; 51. Connection device; 52. Transport pipe; 53. Pneumatic pipe; 54. Coal injection nozzle; 55. Driving device; 56. Connection pipe. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] The following further describes the implementation mode of the present utility model in conjunction with the accompanying drawings and embodiments. The following embodiments are used to illustrate the present utility model, but cannot be used to limit the scope of the present utility model.

[0025] In the description of the present utility model, unless otherwise specified, "a plurality of" means two or more; the orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying 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 to the present utility model. In addition, terms such as "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0026] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "connected" and "connected" 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 directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0027] Please refer to Figure 1 — Figure 4 , in this implementation mode, a blast furnace smelting device with a low fuel ratio includes a blast furnace body 1. An equipment feeding and screening mechanism is installed above the blast furnace body 1, a fuel reasonable discharge mechanism is installed above the interior of the blast furnace body 1, an equipment pipe 11 is connected to the outside of the blast furnace body 1, a detection device 12 is installed at one end of the equipment pipe 11, a switch 13 is installed below the detection device 12, and a pressure discharge pipe 14 is installed on one side of the switch 13; the equipment pipe 11 is also installed behind the switch 13, and the pressure discharge pipe 14 and the equipment pipe 11 are of an interconnected structure, and the switch 13 is annularly installed on the outside of the blast furnace body 1.

[0028] Specifically, the blast furnace body 1 is connected through the equipment pipe 11 and the detection device 12. The detection device 12 detects the high temperature inside the blast furnace body 1. When the high temperature and pressure inside the blast furnace body 1 are relatively high, the switch 13 on one side of the blast furnace body 1 can be opened, and then the high pressure is discharged through the pressure discharge pipe 14 to make the internal high pressure of the blast furnace body 1 in a normal state.

[0029] The blast furnace body 1 is cylindrical, and a base 2 is installed below the blast furnace body 1; the equipment feeding and screening mechanism includes: a feeding hopper 4 installed above the blast furnace body 1, an isolation net 41 is installed below the interior of the feeding hopper 4, a cutting device 42 is installed above the isolation net 41, a motor 44 is installed above the cutting device 42, feeding ports 43 are symmetrically installed on both sides of the motor 44, a dust suction device 45 is installed on one side of the exterior of the feeding hopper 4, and a discharge pipe 46 penetrates and is connected inside the dust suction device 45; the feeding hopper 4 forms a connection relationship with the blast furnace body 1 through a connecting device 51, the dust suction device 45 forms a connection relationship with the feeding hopper 4 through the discharge pipe 46, and the opening of the feeding hopper 4 is in the shape of being larger at the top and smaller at the bottom.

[0030] Specifically, a feeding hopper 4 is installed above the blast furnace body 1. An isolation net 41 and a cutting device 42 are installed inside the feeding hopper 4. The cutting device 42 operates through a motor 44 to cut and crush the fuel inside the feeding hopper 4. The cut and crushed fuel increases the contact area with other fuels, can improve the reaction between fuels, increase the value of the fuel, and on one side of the feeding hopper 4, a discharge pipe 46 and a dust suction device 45 are connected. The dust suction device 45 adsorbs fuels with a size less than 5 mm and then conveys them through the discharge pipe 46. The conveyed small particle fuels accumulate together and can be used for subsequent processing.

[0031] The fuel reasonable discharge mechanism includes: a coal injection gun 5 installed above the interior of the blast furnace body 1, a transport pipe 52 is connected below the coal injection gun 5, a pneumatic pipe 53 is connected in the middle of the transport pipe 52, a coal injection nozzle 54 is installed at the bottom of the transport pipe 52, and a driving device 55 is connected to one side of the pneumatic pipe 53; an exhaust pipe 3 is installed on one side below the feeding hopper 4, a connecting device 51 is connected above the coal injection gun 5, and the exhaust pipe 3 is located on one side of the connecting device 51; a connecting pipe 56 is provided at one end of the transport pipe 52, and the coal injection nozzle 54 forms a movable connection relationship with the driving device 55 through the pneumatic pipe 53, and the coal injection nozzle 54 is located in the upper middle part of the interior of the blast furnace body 1.

[0032] Specifically, a coal injection gun 5 is installed above the interior of the blast furnace body 1. The coal injection gun 5 is connected through the transport pipe 52, the pneumatic pipe 53 and the coal injection nozzle 54. A driving device 55 is installed on one side of the pneumatic pipe 53. The driving device 55 moves the pneumatic pipe 53 up and down, so that the height of the coal injection nozzle 54 inside the blast furnace body 1 changes. And the coal injection gun 5 can evenly spray the processed fuel by using its function, so that the fuels are fully mixed with each other, and the highest cost performance of the fuel is exerted.

[0033] In use, the blast furnace body 1 is connected to the feed hopper 4 through the connecting device 51. The feed hopper 4 pours the processed fuel into its interior. Inside the feed hopper 4, a cutting device 42 and a separation net 41 are installed. The cutting device 42 operates using the motor 44 to cut and crush the fuel inside the feed hopper 4. The crushed fuel increases the contact area. At the same time, the separation net 41 blocks the larger individual fuels and makes them continue to be cut. The qualified fuels after cutting fall below the feed hopper 4. At the same time, the floating or smaller granular fuels are adsorbed by the dust suction device 45. The power of the dust suction device 45 is adjusted, and the fuels below the interior of the feed hopper 4 are adsorbed and transported using the arrangement of the discharge pipe 46. The transported small granular fuels are piled up together and can be used for subsequent processing. The qualified fuels enter the interior of the coal injection gun 5 through the arrangements of the feed hopper 4 and the connecting device 51. The coal injection gun 5 directly and evenly discharges the fuel through the arrangements of the transport pipe 52, the pneumatic pipe 53, and the coal injection nozzle 54, so that the fuels are evenly mixed, giving play to the cost performance of the fuels. And on one side of the pneumatic pipe 53, a driving device 55 is installed. The driving device 55 moves the pneumatic pipe 53 up and down, so that the height of the coal injection nozzle 54 changes inside the blast furnace body 1, and the blast furnace body 1 is sprayed at different heights. Finally, a detection device 12 is installed outside the blast furnace body 1. When the temperature inside the blast furnace body 1 is relatively high, the switch 13 can be turned on to discharge the high pressure in the blast furnace body 1 from the pressure discharge pipe 14, so that the blast furnace body 1 operates normally.

[0034] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A blast furnace smelting device with a low fuel ratio, comprising: A blast furnace body (1), wherein an equipment feed screening mechanism is installed above the blast furnace body (1), and a fuel reasonable discharge mechanism is installed above the interior of the blast furnace body (1), characterized in that the equipment feed screening mechanism comprises: a feed hopper (4) installed above the blast furnace body (1), an isolation net (41) is installed below the interior of the feed hopper (4), a cutting device (42) is installed above the isolation net (41), and a motor (44) is installed above the cutting device (42), and feed ports (43) are symmetrically installed on both sides of the motor (44), and a dust suction device (45) is installed on one side of the outside of the feed hopper (4), and a discharge pipe (46) is connected to the inside of the dust suction device (45); The fuel reasonable discharge mechanism comprises: a coal injection gun (5) installed on the upper part of the blast furnace body (1), a transport pipe (52) is connected to the lower part of the coal injection gun (5), a pneumatic pipe (53) is connected to the middle of the transport pipe (52), a coal injection nozzle (54) is installed at the bottom of the transport pipe (52), and a driving device (55) is connected to one side of the pneumatic pipe (53).

2. A low fuel ratio blast furnace smelting device according to claim 1, characterized in that: An exhaust pipe (3) is installed on one side below the feed hopper (4), and a connecting device (51) is connected above the coal injection gun (5), and the exhaust pipe (3) is located on one side of the connecting device (51).

3. The low fuel ratio blast furnace smelting device according to claim 1, characterized in that: The outside of the blast furnace body (1) is connected to an equipment pipe (11), one end of the equipment pipe (11) is installed with a detection device (12), a switch (13) is installed below the detection device (12), and a pressure relief pipe (14) is installed on one side of the switch (13).

4. A low fuel ratio blast furnace smelting device according to claim 2, characterized in that: The feed hopper (4) is connected to the blast furnace body (1) via a connecting device (51), and the dust collecting device (45) is connected to the feed hopper (4) via a discharge pipe (46), and the opening of the feed hopper (4) is larger at the top and smaller at the bottom.

5. The low fuel ratio blast furnace smelting device according to claim 1, characterized in that: A connecting pipe (56) is provided at one end of the transport pipe (52), and a coal injection nozzle (54) is movably connected to a driving device (55) via a pneumatic pipe (53), and the coal injection nozzle (54) is located in the upper middle portion of the blast furnace body (1).

6. The low fuel ratio blast furnace smelting device according to claim 3, characterized in that: The equipment pipe (11) is installed behind the switch (13) at the same time, and the pressure relief pipe (14) and the equipment pipe (11) are interconnected, and the switch (13) is installed in a ring shape outside the blast furnace body (1).

7. The low fuel ratio blast furnace smelting device according to claim 1, characterized in that: The blast furnace body (1) is cylindrical, and a base (2) is installed below the blast furnace body (1).

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