Blast furnace feeding device

Abstract

The blast furnace feeding device comprises a screening mechanism and a feeding mechanism, the screening mechanism comprises a screening shell, a filter plate is arranged in the screening shell, a partition plate is arranged in the screening shell, and the filter plate and the partition plate are matched to divide the interior of the screening shell into a fuel channel and a dust channel. A buffering assembly is arranged in a fuel channel of the screening shell, the feeding mechanism comprises a feeding shell, and a conveying crawler belt is arranged in the feeding shell. By arranging the screening mechanism and the feeding mechanism, dust and fine particles in the coal can be filtered and screened while the coal is conveyed into the blast furnace, so that it is guaranteed that all the coal entering the blast furnace is large-particle coal, and due to the fact that the buffering assembly is arranged in the fuel channel, the coal conveying efficiency is improved. The collision strength in the coal conveying process can be effectively reduced, so that dust and small-particle coal are reduced as much as possible, and normal production of the blast furnace is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of feeding equipment, in particular to a charging device for a blast furnace. Background Art

[0002] A blast furnace is a smelting device. By putting ore and fuel (coke, coal, etc.) into the blast furnace together, the ore is reduced under high-temperature conditions, and the available metallic iron is cracked out. Therefore, during the smelting process of the blast furnace, the quality of the fuel has a crucial impact on production efficiency and quality control. The fuel particle size requirement of the blast furnace is also extremely important. Generally, it is required that the diameter of the fuel particles is below 25 mm, and the generation of dust and fine particles should be minimized. This is because the particle size has an important impact on the combustion rate and pyrolysis degree of coal, while fine particles will increase the combustion difficulty, cause the "slag" phenomenon in the blast furnace, and reduce production efficiency. During the storage and transportation of coal, a large amount of dust and particles will inevitably be generated, and they are transported into the blast furnace together with the conveyor belt, which will affect the production efficiency of the blast furnace. Therefore, how to remove the dust and fine particles inside the coal as much as possible before it enters the blast furnace is the top priority to ensure the normal operation of the blast furnace production. Summary of the Utility Model

[0003] The purpose of the utility model is to avoid the deficiencies of the prior art and provide a charging device for a blast furnace, thereby effectively solving the deficiencies existing in the prior art.

[0004] To achieve the above purpose, the technical solution adopted by the utility model is: a charging device for a blast furnace, including a screening mechanism and a feeding mechanism;

[0005] The screening mechanism includes an L-shaped screening housing. A filter plate is arranged horizontally inside the horizontal part of the screening housing, and filter holes are provided on the filter plate. A partition plate is arranged vertically inside the vertical part of the screening housing. The upper end of the partition plate is fixedly connected to the right end of the filter plate. The filter plate and the partition plate cooperate to divide the interior of the screening housing into a fuel channel and a dust channel. A buffer assembly is arranged in the fuel channel of the vertical part of the screening housing. An inlet communicating with the fuel channel is arranged at the left end of the horizontal part of the screening housing. The lower end of the fuel channel is communicated with the feeding mechanism through a feeding pipe. An exhaust pipe for discharging external dust is arranged at the lower end of the dust channel;

[0006] The feeding mechanism includes a feeding housing arranged obliquely upward, and a conveying track is arranged inside the feeding housing.

[0007] Further, the buffer assembly includes an angular first buffer plate and an inclined second buffer plate disposed in the fuel channel at the vertical portion. The first buffer plate and the second buffer plate are evenly distributed along the vertical direction of the fuel channel. The first buffer plate is located in the middle of the fuel channel, and the second buffer plate is disposed on the side walls on both sides of the fuel channel. The first buffer plate and the second buffer plate are alternately arranged, and each layer of the second buffer plate is located below each layer of the first buffer plate. One end of the first buffer plate with a sharp angle faces the arrangement, and the two second buffer plates on both sides are inclined downward at the end facing the sharp angle of the first buffer plate.

[0008] Further, the filter plate is arranged in an inclined manner with the left side higher than the right side, and the upper end of the partition plate is connected to the lower end on the right side of the filter plate.

[0009] Further, a guide plate with the same inclination angle as the filter plate is provided at the upper end of the partition plate, and the guide plate is located above the uppermost first buffer plate.

[0010] Further, a feeding port is provided on the feeding housing at a position corresponding to the upper part of the starting end of the conveying track. The feeding pipe is communicated with the feeding port, and a discharging port is provided on the feeding housing at a position corresponding to the lower part of the ending end of the conveying track.

[0011] Further, the discharge pipe is externally connected to a recovery box.

[0012] Further, a feeding hopper is provided on the screening housing at a position corresponding to the feeding port.

[0013] The above technical solution of the present invention has the following beneficial effects: By setting the screening mechanism and the feeding mechanism, while conveying coal into the blast furnace, the dust and fine particles in the coal are filtered and screened, so as to ensure that only large-particle coal enters the blast furnace. Moreover, the setting of the buffer assembly in the fuel channel can effectively reduce the collision force during the coal conveying process, thereby minimizing the generation of dust and small-particle coal as much as possible, and further ensuring the normal operation of the blast furnace production. Description of the Drawings

[0014] Figure 1 is a schematic main sectional structure view of an embodiment of the present invention;

[0015] Figure 2 is Figure 1 the enlarged view at A in Detailed Embodiments

[0016] In order to more clearly understand the above objects, features and advantages of the present invention, the present invention will be further described in detail below with reference to the drawings and specific embodiments. It should be noted that, without conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.

[0017] In the following description, many specific details are set forth in order to provide a thorough understanding of the present utility model. However, the present utility model may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present utility model is not limited by the specific embodiments disclosed below.

[0018] As Figure 1-2 shown, a charging device for a blast furnace in this embodiment includes a crushing material box body, which includes a screening mechanism and a feeding mechanism;

[0019] The screening mechanism includes an L-shaped screening housing 1. A filter plate 2 is arranged horizontally in the horizontal part of the screening housing 1. Filter holes are provided on the filter plate 2. A partition plate 3 is arranged vertically in the vertical part of the screening housing 1. The upper end of the partition plate 3 is fixedly connected to the right end of the filter plate 2. The filter plate 2 and the partition plate 3 cooperate to divide the interior of the screening housing 1 into a fuel channel 1a and a dust channel 1b. A buffer assembly is arranged in the fuel channel 1a in the vertical part of the screening housing 1. An inlet port communicating with the fuel channel 1a is arranged at the left end of the horizontal part of the screening housing 1. The lower end of the fuel channel 1a is communicated with the feeding mechanism through a feeding pipe 4. A discharge pipe 5 for discharging external dust is arranged at the lower end of the dust channel 1b;

[0020] The feeding mechanism includes a feeding housing 6 arranged obliquely upward, and a conveying track 7 is arranged inside the feeding housing 6.

[0021] The buffer assembly includes an angular first buffer plate 8 and an inclined second buffer plate 9 arranged in the fuel channel 1a at the vertical part. The first buffer plate 8 and the second buffer plate 9 are evenly distributed along the vertical direction of the fuel channel 1a. The first buffer plate 8 is located in the middle of the fuel channel 1a. The second buffer plate 9 is arranged on the side walls on both sides of the fuel channel 1a. The first buffer plate 8 and the second buffer plate 9 are arranged alternately, and each layer of the second buffer plate 9 is located below each layer of the first buffer plate 8. The end of the first buffer plate 8 with a sharp corner faces the arrangement. The two second buffer plates 9 on both sides are arranged obliquely downward at the end facing the sharp corner of the first buffer plate 8. With such an arrangement, the coal falling along the two second buffer plates 9 can be concentrated on the sharp corner end of the first buffer plate 8.

[0022] The first buffer plate 8 is further provided with a first buffer protrusion 8a on the upper end of its plate surface. The second buffer plate 9 is further provided with a second buffer protrusion 9a on its plate surface. Each buffer protrusion can slow down the falling speed of the coal fuel, thereby reducing the impact force generated by the falling of the coal, and further avoiding the fragmentation of the coal blocks and the generation of dust or fine particles.

[0023] The filter plate 2 is arranged obliquely with the left end higher than the right end. The upper end of the partition plate 3 is connected to the lower end on the right side of the filter plate 2.

[0024] To improve the screening efficiency, a vibrator can also be provided on the screening housing 1. Vibration can assist in screening the coal and help the screened coal fall along the fuel passage 1a.

[0025] A guide plate with the same inclination angle as the filter plate is provided at the upper end of the partition plate, and the guide plate is located above the uppermost first buffer plate.

[0026] A feed inlet 6a is provided on the feeding housing 6 at a position corresponding to the upper part of the starting end of the conveying track 7. The feeding pipe 4 is communicated with the feed inlet 6a. A discharge port 6b is provided on the feeding housing 7 at a position corresponding to the lower part of the ending end of the conveying track 7. The screened coal falls into the blast furnace along the discharge port 6b.

[0027] The discharge pipe 5 is externally connected to a recovery box 11, and the recovery box 11 is used to recover the screened dust and fine fuel particles.

[0028] A feed hopper 12 is provided on the screening housing 1 at a position corresponding to the feed inlet.

[0029] The working principle of the present utility model is as follows: The fuel coal enters the fuel passage 1a in the horizontal part of the screening housing 1 through the feed hopper 12. Subsequently, the coal starts to slide along the filter plate 2. During the sliding process, dust and fine particles will fall through the filter holes on the filter plate 2 into the dust passage 1b. Subsequently, the dust, fine particles and coal fall along the dust passage 1b and the fuel passage 1b respectively. Among them, the dust and fine particles will enter the recovery box 11 through the dust passage 1b and the discharge pipe 5 for recovery, while the coal enters the vertical fuel passage 1a along the horizontal fuel passage 1a. During the falling process of the coal, it will continuously slide alternately between the first buffer plate 8 and the second buffer plate 9. First, the first buffer plate 8 will guide the coal to both sides of the second buffer plate 9 respectively. Subsequently, the coal on both sides of the second buffer plate 9 will converge to the lower first buffer plate 8 again. Alternating in this way, the impact force generated when the coal falls is reduced, thereby reducing the generation of dust and fine particles. Finally, the coal enters the conveying track 7 in the feeding housing 6 through the feeding pipe 4, and the conveying track 7 conveys the coal into the blast furnace.

[0030] The embodiments of the present utility model are given for purposes of illustration and description, and are not exhaustive or limit the present utility model to the disclosed form. Many modifications and variations are obvious to those of ordinary skill in the art. The embodiments are selected and described to better illustrate the principles and practical applications of the present utility model, and enable those of ordinary skill in the art to understand the present utility model and thus design various embodiments with various modifications suitable for specific purposes.

Claims

1. A blast furnace charging device, characterized in that: Including screening mechanism and feeding mechanism; The screening mechanism comprises an L-shaped screening shell, a filter plate is arranged in the horizontal direction along the inner side of the transverse part of the screening shell, filter holes are arranged on the filter plate, a partition is arranged in the vertical direction along the inner side of the vertical part of the screening shell, the upper end of the partition is fixedly connected to the right end of the filter plate, the filter plate and the partition cooperate to separate the interior of the screening shell into a fuel channel and a dust channel, a buffer assembly is arranged in the fuel channel of the vertical part of the screening shell, a feed port connected to the fuel channel is arranged at the left end of the transverse part of the screening shell, the lower end of the fuel channel is connected to the feeding mechanism through a feeding pipe, and a discharge pipe for discharging dust is arranged at the lower end of the dust channel; The feeding mechanism comprises a feeding shell which is arranged obliquely upward, and a conveying crawler is arranged inside the feeding shell.

2. A blast furnace charging device according to claim 1, characterized in that: The buffer assembly includes an angular first buffer plate and an inclined second buffer plate arranged in the fuel channel at the vertical portion. The first buffer plate and the second buffer plate are evenly distributed along the vertical direction of the fuel channel. The first buffer plate is located in the middle of the fuel channel, and the second buffer plate is arranged on the side walls on both sides of the fuel channel. The first buffer plate and the second buffer plate are arranged alternately and each layer of the second buffer plate is located below each layer of the first buffer plate. The first buffer plate is arranged with one end with a sharp corner facing the first buffer plate, and the second buffer plates on both sides are arranged inclined downward at the end facing the sharp corner of the first buffer plate.

3. A blast furnace charging device according to claim 2, characterized in that: The filter plate is arranged obliquely with the left side higher and the right side lower, and the upper end of the partition plate is connected to the lower end of the right side of the filter plate.

4. A blast furnace charging device according to claim 3, characterized in that: A guide plate having the same inclination angle as that of the filter plate is disposed at the upper end of the partition plate, and the guide plate is located above the uppermost first buffer plate.

5. A blast furnace charging device according to claim 1, characterized in that: The feeding shell is provided with a feeding port at a position corresponding to the upper part of the feeding starting end of the conveying crawler, the feeding pipe is connected with the feeding port, and the feeding shell is provided with a discharging port at a position corresponding to the lower part of the feeding end of the conveying crawler.

6. A blast furnace charging device according to claim 1, characterized in that: The discharge pipe is externally connected to a recovery box.

7. A blast furnace charging device according to claim 1, characterized in that: The screening shell is provided with a feed hopper at a position corresponding to the feed port.

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