Large blast furnace feeding device

Abstract

The utility model relates to the field of blast furnace feeding, and discloses a large blast furnace feeding device which comprises a plurality of coke bins, material preparation equipment is fixed in each coke bin, a material guide pipe is fixed on the top surface of each material preparation equipment, a conveying pipe is fixed on one side of each material preparation equipment, and small-range weighing equipment is fixed at the bottom end of each conveying pipe. A 30mm large-size vibrating screen is adopted in the small-range weighing equipment, a material conveying pipe is fixed on the bottom surface of the small-range weighing equipment, a material collecting hopper is fixed at the upper end in the coke bin, a fixed square hole is formed in the surface of the material collecting hopper, the fixed square hole is fixedly inserted into the upper end of a material guide pipe, and a material conveying pipe is fixed on the lower end of the material guide pipe. And a transmission pipe is fixed on the bottom surface of the material preparation equipment. In the utility model, a set of material preparation equipment is additionally arranged, so that the size of the screen can be adjusted more flexibly, the independent material preparation of high-quality large-size coke is achieved, and meanwhile, after the method is improved, the process adjustment is not restricted by the capabilities of the original four sets of material preparation devices, the adjustment is more flexible, and the material preparation is more accurate.

Description

Technical Field

[0001] The utility model relates to the technical field of blast furnace charging, in particular to a large-scale blast furnace charging device. Background Art

[0002] Blast furnace ironmaking has good technical and economic indicators, simple process, large production volume, high labor productivity, low energy consumption and other advantages. Therefore, the iron produced by this method accounts for the vast majority of the world's total iron production. The primary process of blast furnace production is to use the blast furnace feeder to deliver iron ore, coke, slag flux, etc. to the top of the furnace. In addition, when the blast furnace is charged, various materials need to be introduced into the conveyor belt through the coke bin and ore bin according to a certain ratio, and then transported to the blast furnace by the belt for production.

[0003] Each 3000m3 blast furnace is equipped with four sets of coke screening and weighing equipment. According to the process adjustment, one of the coke scales is used for the preparation of the center coke of the blast furnace. About 1500kg of center coke is added each time. In addition, the coke vibrating screen has a fast vibration speed, the demand for center coke is small, and the inertia margin of coke on the vibrating screen, automatic compensation and other influencing factors cannot achieve accurate weighing and cannot meet the center coke weighing requirements. The quality of center coke requires large particle size, and the shared coke screen leads to waste of high-quality coke. The center coke preparation occupies the main coke preparation equipment, resulting in extended preparation time, slow loading speed and limited blast furnace loading capacity.

[0004] Each blast furnace is equipped with four sets of coke screening and weighing equipment. At present, one of the coke scales is used for the preparation of the central coke of the blast furnace. The normal coke batch is 19 tons, and the normal coke vibration speed is controlled at 28-40kg / s to meet normal production needs. The existing coke process weighing range is 45 tons, the system accuracy is 5‰FS, and the maximum error is 250kg. Due to the fast vibration speed, the small demand for central coke, and the inertia of coke and other influencing factors, the actual weighing error is large and accurate weighing cannot be achieved; because the central coke occupies one of the four sets of coke preparation equipment, the blast furnace preparation time is extended, the feeding accuracy is reduced, and the feeding capacity is limited. Utility Model Content

[0005] The utility model aims to provide a large-scale blast furnace charging device to solve the problem that the blast furnace preparation time is prolonged, the charging accuracy is reduced and the charging capacity is limited because the central coke occupies one of the four sets of coke preparation equipment.

[0006] In order to achieve the above-mentioned purpose of the utility model, the utility model adopts the following technical scheme: a large-scale blast furnace charging device, including several coke bins, several of the coke bins are fixed with material preparation equipment, the top surface of the material preparation equipment is fixed with a material guide pipe, one side of the material preparation equipment is fixed with a transport pipe, the bottom end of the transport pipe is fixed with a small-range weighing device, the interior of the small-range weighing device adopts a 30mm large-size vibrating screen, the bottom surface of the small-range weighing device is fixed with a material conveying pipe, the upper end of the interior of the coke bin is fixed with a gathering funnel, the surface of the gathering funnel is provided with a fixed square hole, the fixed square hole is fixedly inserted with the upper end of the material guide pipe, and the bottom surface of the material preparation equipment is fixed with a transmission pipe.

[0007] Preferably, a fixed bottom plate is fixed inside the coke bin, and an original material preparation device is fixed on the top surface of the fixed bottom plate.

[0008] Preferably, a material distribution pipe is fixed to the bottom surface of the raw material preparation device, a powder return chamber is fixed to one end of the material distribution pipe, and a powder return belt is arranged inside the powder return chamber.

[0009] Preferably, an original weighing device is fixed to the other end of the distribution pipe, and a belt conveyor is arranged below the coke bin.

[0010] Preferably, a first layer platform is fixed on the surface of the coke bin, and a second layer platform is fixed on the surface of the coke bin.

[0011] Preferably, a dust removal duct B is fixedly penetrated through the surface of the original material preparation device, and a dust removal duct A is fixedly penetrated through the top surface of the original weighing equipment.

[0012] Compared with the prior art, a large blast furnace charging device adopting the above technical solution has the following features:

[0013] Beneficial effects:

[0014] 1. The newly added preparation equipment uses a 30mm large-size vibrating screen. The range of the newly added preparation equipment is 4 tons. The newly added preparation equipment is independently controlled by an automated program and does not occupy the main coke equipment and process. Through the newly added equipment, the main coke preparation device is changed from the original 4 coke bins with 4 sets of preparation devices to 4 coke bins with 5 sets of preparation devices. Since one set of preparation devices has been added, the overall preparation speed has been increased by 1 / 4. Under the current blast furnace process cycle, the newly added set of preparation equipment can more flexibly adjust the screen size to achieve separate preparation of high-quality large-size coke, reducing the problem of waste of high-quality coke due to excessive screen size. At the same time, after the method is transformed, the process adjustment is not restricted by the capacity of the original 4 sets of preparation devices, the adjustment is more flexible, and the preparation is more accurate;

[0015] 2. Dust removal duct B and dust removal duct A will be used to collect dust when coke falls on the weighing equipment and when coke is screened. The first-layer platform and the second-layer platform fixed on the surface of the coke bin can facilitate staff to inspect the surface of the coke bin, facilitate quick maintenance, and increase service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a front view schematic diagram of an embodiment.

[0017] Figure 2 It is an exploded schematic diagram of an embodiment.

[0018] Figure 3 It is a schematic diagram of the coke bin and the fixed bottom plate in the embodiment.

[0019] Figure 4 It is a schematic diagram of the material distribution pipe and the dust removal pipe A in the embodiment.

[0020] In the figure: 1. coke bin; 2. material preparation equipment; 3. material guide pipe; 4. fixed square hole; 5. transport pipe; 6. small-range weighing equipment; 7. material delivery pipe; 8. transmission pipe; 9. collecting funnel; 10. original material preparation device; 11. dust removal pipeline A; 12. fixed bottom plate; 13. material distribution pipe; 14. powder return chamber; 15. original weighing equipment; 16. first-level platform; 17. second-level platform; 18. belt conveyor; 19. dust removal pipeline B. DETAILED DESCRIPTION

[0021] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings.

[0022] like Figure 1 , Figure 2 and Figure 4 As shown, a large-scale blast furnace charging device comprises a plurality of coke bins 1, wherein a material preparation device 2 is fixed inside each of the plurality of coke bins 1, a material guide pipe 3 is fixed on the top surface of the material preparation device 2, a transport pipe 5 is fixed on one side of the material preparation device 2, a small-range weighing device 6 is fixed on the bottom end of the transport pipe 5, a 30 mm large-size vibrating screen is adopted inside the small-range weighing device 6, a material conveying pipe 7 is fixed on the bottom surface of the small-range weighing device 6, a material collecting funnel 9 is fixed on the upper end of the interior of the coke bin 1, a fixed square hole 4 is opened on the surface of the material collecting funnel 9, the fixed square hole 4 is fixedly inserted with the upper end of the material guide pipe 3, and a transmission pipe 8 is fixed on the bottom surface of the material preparation device 2.

[0023] During use, the newly added material preparation equipment 2 adopts a 30mm large-size vibrating screen. The measuring range of the newly added material preparation equipment 2 is 4 tons. The newly added material preparation equipment 2 is independently controlled by an automated program and does not occupy the main coke equipment and process. Through the newly added equipment, the main coke preparation device is changed from the original 4 coke bins with 4 sets of material preparation devices to 4 coke bins with 5 sets of material preparation devices. Since one set of material preparation devices is added, the overall material preparation speed is increased by 1 / 4. Under the current blast furnace process cycle, a new set of material preparation equipment 2 can more flexibly adjust the screen size to achieve separate preparation of high-quality large-particle coke, reducing the waste of high-quality coke due to excessive screen hole size. At the same time, after the method is transformed, the process adjustment is not restricted by the capacity of the original 4 sets of material preparation devices, the adjustment is more flexible, and the material preparation is more accurate.

[0024] like Figure 1-Figure 4 As shown, a fixed bottom plate 12 is fixed inside the coke bin 1, an original material preparation device 10 is fixed on the top surface of the fixed bottom plate 12, a distribution pipe 13 is fixed on the bottom surface of the original material preparation device 10, a powder return chamber 14 is fixed at one end of the distribution pipe 13, a powder return belt is arranged inside the powder return chamber 14, an original weighing device 15 is fixed at the other end of the distribution pipe 13, a belt conveyor 18 is arranged below the coke bin 1, a first-layer platform 16 is fixed on the surface of the coke bin 1, a second-layer platform 17 is fixed on the surface of the coke bin 1, a dust removal pipe B19 is fixed through the surface of the original material preparation device 10, and a dust removal pipe A11 is fixed through the top surface of the original weighing device 15.

[0025] During use, the dust removal duct B19 and the dust removal duct A11 are used to collect dust generated when coke falls on the weighing equipment and when coke is screened. The first platform 16 and the second platform 17 fixed on the surface of the coke bin 1 can facilitate staff to patrol and inspect the surface of the coke bin 1, facilitate quick maintenance, and increase service life.

[0026] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A large blast furnace charging device, comprising a plurality of coke bins (1), characterized in that: A material preparation device (2) is fixed inside a plurality of the coke bins (1), a material guide pipe (3) is fixed on the top surface of the material preparation device (2), a transport pipe (5) is fixed on one side of the material preparation device (2), a small-range weighing device (6) is fixed at the bottom end of the transport pipe (5), a 30 mm large-size vibrating screen is used inside the small-range weighing device (6), a material conveying pipe (7) is fixed on the bottom surface of the small-range weighing device (6), a material collecting funnel (9) is fixed at the upper end of the interior of the coke bin (1), a fixed square hole (4) is opened on the surface of the material collecting funnel (9), the fixed square hole (4) is fixedly inserted with the upper end of the material guide pipe (3), and a transmission pipe (8) is fixed on the bottom surface of the material preparation device (2).

2. A large blast furnace charging device according to claim 1, characterized in that: A fixed bottom plate (12) is fixed inside the coke bin (1), and a raw material preparation device (10) is fixed on the top surface of the fixed bottom plate (12).

3. A large blast furnace charging device according to claim 2, characterized in that: A material distribution pipe (13) is fixed to the bottom surface of the raw material preparation device (10), a powder return chamber (14) is fixed to one end of the material distribution pipe (13), and a powder return belt is arranged inside the powder return chamber (14).

4. A large-scale blast furnace charging device according to claim 3, characterized in that: The other end of the material distribution pipe (13) is fixed with an original weighing device (15), and a belt conveyor (18) is arranged below the coke bin (1).

5. A large blast furnace charging device according to claim 1, characterized in that: A first-layer platform (16) is fixed on the surface of the coke bin (1), and a second-layer platform (17) is fixed on the surface of the coke bin (1).

6. A large-scale blast furnace charging device according to claim 4, characterized in that: A dust removal duct B (19) is fixedly passed through the surface of the original material preparation device (10), and a dust removal duct A (11) is fixedly passed through the top surface of the original weighing device (15).

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