Feeding device for blast furnace ironmaking

Abstract

The utility model discloses a feeding device for blast furnace ironmaking, and relates to the technical field of blast furnace ironmaking. The device comprises a feeding barrel capable of being fixed at a feeding hole of the blast furnace, the elliptical gear ring is coaxially fixed on the surface of the feeding barrel; the arc-shaped rails are symmetrically arranged on the surface of the feeding barrel in a penetrating manner; the rotating shaft is slidably arranged on the inner wall of the arc-shaped track; the gear is coaxially fixed on the peripheral side surface of the rotating shaft and is meshed and matched with the elliptical gear ring; the crushing roller is fixed to the bottom end of the rotating shaft and located in an inner cavity of the feeding barrel. By arranging the oval gear ring and the arc-shaped track parallel to the oval gear ring, when the rotating shaft moves on the inner wall of the arc-shaped track, the crushing rollers are driven by the gears to rotate while sliding close to each other, then the distance between the crushing rollers and the extrusion force are dynamically changed, and the crushing efficiency of raw materials is improved.

Description

Technical Field

[0001] This utility model belongs to the field of blast furnace ironmaking technology, and in particular relates to a charging device for blast furnace ironmaking. Background Technology

[0002] Blast furnace ironmaking is a crucial process in modern steel production, primarily extracting iron from iron ore through a reduction reaction. During blast furnace operation, raw materials (including iron ore, coke, and flux) are continuously charged into the furnace via a charging system to ensure stable production and efficient operation. As one of the key pieces of equipment in the blast furnace, the performance of the charging device directly affects the efficiency of raw material conveying, the uniformity of raw material distribution within the furnace, and the subsequent smelting results.

[0003] Currently, in blast furnace ironmaking, raw material transportation is mainly accomplished through automated charging systems. These systems are responsible for continuously loading sintered ore, pellets, coke, and other furnace materials into the blast furnace top according to a predetermined ratio. However, in actual production, it has been found that the physical properties of the raw materials, especially their particle size distribution, have a significant impact on the smelting process. When the raw materials are not sufficiently crushed and ground, a large number of oversized particles will exist. These excessively large particles reduce the specific surface area of ​​the furnace charge, thus decreasing the contact efficiency between the reducing gas and the solid furnace charge. The combined effect of these factors ultimately leads to incomplete reduction reactions within the blast furnace.

[0004] To address these issues, we provide a charging device for blast furnace ironmaking. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution: This utility model is a charging device for blast furnace ironmaking, including a charging bucket that can be fixed at the blast furnace inlet;

[0006] An elliptical toothed ring is coaxially fixed to the surface of the feed hopper;

[0007] An arc-shaped track is symmetrically opened through the surface of the feed hopper;

[0008] A rotating shaft is slidably disposed on the inner wall of the arc-shaped track;

[0009] The gear is coaxially fixed to the circumferential side of the rotating shaft and meshes with an elliptical gear ring.

[0010] The crushing roller is fixed at the bottom of the rotating shaft and located inside the feed hopper.

[0011] During the process of the rotating shaft moving from one end of the arc track to the other, it drives the gear to rotate along the elliptical toothed ring, causing the two crushing rollers to first move away from each other and then move closer to each other.

[0012] The utility model further sets up, the distance of two the arc track middle position is 1.5-2 times of the distance between end.

[0013] The utility model further sets up, the circumference side of the broken roll is evenly fixed with a plurality of protrusions in circumferential array distribution, and the distance between two adjacent protrusions in the circumferential direction of the broken roll is greater than the width of a single protrusion.

[0014] The utility model further sets up, when the pivot moves to the arc track end, the protrusions on two broken rolls are staggered distribution, and the protrusions on a single broken roll are attached to the circumferential side of the adjacent broken roll.

[0015] The utility model further sets up, the broken roll top end is provided with the chamfer that inclines downward.

[0016] The utility model further sets up, the surface of the feed barrel is slidably provided with a sliding frame along the major axis direction of the oval gear ring, and the top end of the pivot is attached and slidably arranged in the inner wall of the sliding frame.

[0017] The utility model has the following beneficial effects: 1, the utility model discloses an oval gear ring and the parallel oval gear ring of arc track are set up, make the pivot move in the arc track inner wall, drive the broken roll edge mutual approach sliding edge autorotation through the gear, further dynamically change the spacing and extrusion force of broken roll, improve the broken efficiency of raw material.

[0018] 2, the pivot of the utility model slides back and forth in the arc track inner wall, further drives the broken roll to slide back and forth, further changes the rotation direction of the broken roll, prevents the broken roll from being damaged continuously along the same direction rotation.

[0019] Of course, any product implementing the utility model does not necessarily need to achieve all the advantages described above. DRAWINGS

[0020] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the following will briefly introduce the drawings needed to be used in the embodiment description, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without creating labor.

[0021] Figure 1 It is a kind of high furnace ironmaking with the structure diagram of feeding device.

[0022] Figure 2 It is the A area enlarged view of the utility model Figure 1

[0023] Figure 3 It is the A area enlarged view of the utility model Figure 1 ​Elevational view of the device.

[0024] Figure 4 Figure 4 is a partial cross-sectional view of the device when the rotating shaft is located in the middle of the arc-shaped track.

[0025] Figure 5 Figure 5 is a partial cross-sectional view of the device when the rotating shaft is located at the end of the arc-shaped track.

[0026] In the drawings, the components represented by each reference numeral are listed as follows:

[0027] 1, feed barrel; 2, oval tooth ring; 3, arc-shaped track; 4, rotating shaft; 5, gear; 6, crushing roller; 7, protrusion; 8, sliding frame. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the device will be clearly and completely described below with reference to the drawings in the embodiments of the device. Obviously, the described embodiments are only part of the embodiments of the device, rather than all the embodiments. Based on the embodiments in the device, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the device. DETAILED DESCRIPTION

[0030] Please refer to Figure 1 , the device is a feeding device for blast furnace ironmaking, which comprises a feed barrel 1 that can be fixed at the feed inlet of the blast furnace, and a plurality of through holes are formed through the bottom surface of the feed barrel 1. Only powders smaller than the diameter of the through holes can pass through the through holes and fall into the interior of the blast furnace.

[0031] Further, please refer to Figure 2 , an oval tooth ring 2 is coaxially fixed to the surface of the feed barrel 1; the oval tooth ring 2 is provided in an oval appearance, and compared with the conventional circular tooth ring, the distance from the axis of the sawtooth at different positions of the side wall of the oval tooth ring 2 is different, and when the part moves along the circumferential surface of the oval tooth ring 2, the position of the part from the axis of the oval tooth ring 2 is dynamically changed.

[0032] Further, please refer to Figure 1 , Figure 2 , an arc-shaped track 3 is symmetrically formed through the surface of the feed barrel 1; the arc-shaped track 3 is symmetrically arranged on both sides of the oval tooth ring 2, and a single arc-shaped track 3 takes the minor axis of the oval tooth ring 2 as the axis of symmetry, and the two arc-shaped tracks 3 take the major axis of the oval tooth ring 2 as the axis of symmetry, so that the distance between the two ends of the two arc-shaped tracks 3 is the smallest, and the distance at the middle position is the largest. The arc-shaped track 3 is arranged in parallel to the oval tooth ring 2, so that the distance from the arc-shaped track 3 to the side wall of the oval tooth ring 2 remains unchanged.

[0033] Further, please refer to Figure 1、 Figure 2 Two rotating shafts 4 are respectively slidably arranged in the inner wall of the arc-shaped track 3, and the sliding paths of the two rotating shafts 4 are symmetrical. When the two rotating shafts 4 respectively slide to the same end of the corresponding arc-shaped track 3, the distance between the two rotating shafts 4 is the shortest. When the two rotating shafts 4 jointly slide to the other end of the arc-shaped track 3, the distance between the two rotating shafts 4 first becomes farther and farther and then becomes closer and closer, and the distance between the two rotating shafts 4 is the largest when the two rotating shafts 4 are located at the middle positions of the corresponding arc-shaped tracks 3.

[0034] The gear 5 is coaxially fixed on the side surface of the rotating shaft 4 and is in meshing cooperation with the elliptical tooth ring 2. When the rotating shaft 4 moves, the gear 5 moves correspondingly. Since the gear 5 is in meshing cooperation with the elliptical tooth ring 2, the gear 5 will move along the side surface of the elliptical tooth ring 2 and rotate at the same time. The distance between the two gears 5 changes in the same way as the rotating shaft 4.

[0035] The crushing roller 6 is fixed at the bottom end of the rotating shaft 4 and located in the inner cavity of the feeding barrel 1. When the rotating shaft 4 moves and rotates, the crushing roller 6 moves and rotates at the same time. When the two crushing rollers 6 approach each other, the crushing rollers 6 will generate extrusion force on the raw materials in the feeding barrel 1, thereby facilitating the crushing of raw materials with large volume. The distance between the two crushing rollers 6 changes dynamically, so that raw materials with different volumes can be crushed.

[0036] When crushing raw materials with large volume, the raw materials are first located between the two crushing rollers 6. As the distance between the two crushing rollers 6 becomes smaller and smaller, the crushing roller 6 first extrudes the raw materials, and then rotates and grinds the raw materials. This prevents the crushing roller 6 from being damaged too much when directly rotating and grinding the raw materials, thereby affecting the service life of the crushing roller 6.

[0037] At the same time, the rotating shaft 4 slides back and forth in the inner wall of the arc-shaped track 3, thereby driving the crushing roller 6 to slide back and forth, thereby changing the rotating direction of the crushing roller 6, preventing the crushing roller 6 from being continuously damaged in the same direction.

[0038] Moreover, the distance between the two crushing rollers 6 changes dynamically, so that the extrusion force of the crushing roller 6 can be dynamically changed compared to the crushing roller 6 with fixed distance.

[0039] Further, please refer to Figure 1The distance between the two arc-shaped tracks 3 at the middle position is 1.5-2 times the distance between the ends; when the rotating shaft 4 is located at the end of the arc-shaped track 3, the distance between the two crushing rollers 6 is the smallest, and only powder raw materials are allowed to pass; when the rotating shaft 4 is located at the middle position of the arc-shaped track 3, the distance between the two crushing rollers 6 is the largest, and large-volume block raw materials are allowed to pass and are crushed by extrusion. The distance between the two ends and the middle position of the arc-shaped track 3 is limited so that when the crushing rollers 6 are located at the end of the arc-shaped track 3, they just fit without generating extrusion force, and when the crushing rollers 6 are located at the middle position of the arc-shaped track 3, the distance between them is not too large, and a too large distance may not generate extrusion force on most or even all of the raw materials, causing the crushing rollers 6 to generate useless work and thus reducing the crushing efficiency.

[0040] Further, as shown in Figure 1 , Figure 4 and Figure 5 , the circumferential side of the crushing roller 6 is uniformly fixed with a plurality of protrusions 7 in a circumferential array. The distance between the two adjacent protrusions 7 in the circumferential direction of the crushing roller 6 is greater than the width of a single protrusion 7. By increasing the protrusions 7, the outer surface of the crushing roller 6 is uneven, and the crushing force is improved.

[0041] As shown in Figure 4 , when the two rotating shafts 4 are located at the middle position of the arc-shaped track 3, the distance between the two crushing rollers 6 is the largest, and the crushing rollers 6 and the protrusions 7 thereon do not contact. As the rotating shafts 4 slowly move towards the end of the arc-shaped track 3, the distance between the two rotating shafts 4 becomes smaller, and thus the distance between the two crushing rollers 6 becomes smaller. Finally, the two crushing rollers 6 fit, and the protrusion 7 on one of the crushing rollers 6 is inserted between the two protrusions 7 on the other crushing roller 6, i.e., as shown in Figure 5 , the largest extrusion force is generated on the raw materials.

[0042] Further, as shown in Figure 3 , the top end of the crushing roller 6 is provided with an inclined downward chamfer, and the surface of the feeding barrel 1 is provided with a feeding pipe. The raw materials are transported into the feeding barrel 1 through the feeding pipe. The top end of the crushing roller 6 is chamfered to be inclined downward, which is beneficial to the falling of the raw materials and prevents the raw materials from falling on the top end of the crushing roller 6, affecting the crushing efficiency.

[0043] Further, as shown in Figure 1 , Figure 2 , the surface of the feeding barrel 1 is slidingly provided with a sliding frame 8 along the long axis direction of the oval tooth ring 2. The top end of the rotating shaft 4 is slidingly arranged on the inner wall of the sliding frame 8. The surface of the feeding barrel 1 is fixed with an electric telescopic rod, and the telescopic end of the electric telescopic rod is fixedly connected with the sliding frame 8. The sliding frame 8 is moved by the electric telescopic rod, and thus the rotating shaft 4 is slidingly moved in the inner wall of the arc-shaped track 3, and thus the gear 5 and the crushing roller 6 are moved, improving the automation efficiency.

[0044] In the description of the specification, the description of the terms "one embodiment", "an example", "a specific example" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the utility model. In the specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0045] The preferred embodiments of the utility model disclosed above are only used for helping to set forth the utility model. The preferred embodiments do not describe all the details exhaustively, and also do not limit the utility model to only the specific implementation manners described. Obviously, according to the content of the specification, many modifications and changes can be made. The specification selects and specifically describes these embodiments, in order to better explain the principles and practical applications of the utility model, so that the persons skilled in the art can well understand and utilize the utility model. The utility model is limited only by the claims and the whole scope and equivalents thereof.

Claims

1. A charging device for blast furnace ironmaking, characterized by: Comprising a feeding barrel (1) fixed at the feeding port of a blast furnace; an elliptical gear ring (2) coaxially fixed on the surface of the feeding barrel (1); an arc-shaped track (3) symmetrically penetrating the surface of the feeding barrel (1); a rotating shaft (4) slidingly arranged in the inner wall of the arc-shaped track (3); a gear (5) coaxially fixed on the lateral surface of the rotating shaft (4) and engaged with the elliptical gear ring (2); a crushing roller (6) fixed on the bottom end of the rotating shaft (4) and located in the inner cavity of the feeding barrel (1); wherein, during the movement of the rotating shaft (4) from one end to the other end of the arc-shaped track (3), the gear (5) is driven to rotate along the elliptical gear ring (2), and the two crushing rollers (6) are first moved away from each other and then moved close to each other.

2. The feeding device for blast furnace ironmaking according to claim 1, wherein the distance between the middle positions of the two arc-shaped tracks (3) is 1.5-2 times the distance between the end positions.

3. The feeding device for blast furnace ironmaking according to claim 2, wherein a plurality of protrusions (7) are uniformly fixed on the lateral surface of the crushing roller (6) in a circumferential array, and the distance between two adjacent protrusions (7) in the circumferential direction of the crushing roller (6) is greater than the width of a single protrusion (7).

4. The feeding device for blast furnace ironmaking according to claim 3, wherein when the rotating shaft (4) moves to the end of the arc-shaped track (3), the protrusions (7) on the two crushing rollers (6) are distributed in a staggered manner, and the protrusions (7) on a single crushing roller (6) are attached to the lateral surface of the adjacent crushing roller (6).

5. The feeding device for blast furnace ironmaking according to claim 4, wherein an inclined downward chamfer is arranged at the top end of the crushing roller (6).

6. The feeding device for blast furnace ironmaking according to claim 5, wherein a sliding frame (8) is slidingly arranged on the surface of the feeding barrel (1) along the major axis direction of the elliptical gear ring (2), and the top end of the rotating shaft (4) is slidingly arranged in the inner wall of the sliding frame (8).

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