Pellet sintering material homogenizing structure

Abstract

The utility model discloses a kind of material uniform structures for pellet sintering, including intermittent deflection component being arranged on transmission roller and the material distributor connected with intermittent deflection component;The intermittent deflection component includes guide rail and two respectively rotating transmission sleeve being arranged in the both ends of transmission roller, cam plate is equipped on transmission sleeve, and the protruding of cam plate is fixed with sliding column, and sliding column is slidably connected with the guide groove being opened on guide rail;The material distributor includes first support plate and second support plate being arranged on transmission sleeve;First baffle is equipped between two first support plates, and second baffle is equipped between two second support plates The guide groove includes first deflection portion, horizontal portion and second deflection portion communicated in sequence, and first deflection portion, and second deflection portion is closer to transmission roller axis than horizontal portion, to adjust the attitude of first baffle and second baffle in different positions.Effect of solving the problem that pellet material distributor cannot be well distributed at the edge of shaft furnace body in prior art, and further influence pellet sintering.

Description

Technical Field

[0001] This utility model relates to the field of pellet processing technology, specifically to a homogenization structure for pellet sintering. Background Technology

[0002] Pellet production, a crucial link in the steel industry chain, directly impacts the efficiency and cost of subsequent ironmaking processes. A typical pellet production process includes iron-containing raw material pretreatment, batching and mixing, pelletizing, and finally, roasting and sintering in a vertical shaft furnace to form qualified pellets. The feeding stage, a core process before roasting in the vertical shaft furnace, directly determines the initial distribution of pellets within the furnace, playing a decisive role in the subsequent roasting effect.

[0003] In vertical shaft furnace pellet production, uniform pellet distribution is a crucial prerequisite for ensuring the quality of roasting and sintering. Only when the pellets are evenly distributed within the furnace can the temperature and gas flow fields within the furnace be stabilized, allowing each pellet to fully contact heat and reacting gases. This not only improves the strength and reducibility of the pellets, reducing unqualified products such as green and over-burned pellets, but also optimizes energy utilization efficiency, reduces energy costs such as gas and electricity consumption, and avoids equipment wear and tear caused by excessive local loads, ensuring continuous and stable production.

[0004] Currently, the most commonly used pellet feeders in the industry are reciprocating feeders. Reciprocating feeders rely on the reciprocating motion of a feeding trolley to distribute the pellets. Existing feeders are all based on mechanical motion principles to disperse the pellets. However, in practical applications, due to limitations in structural design and movement methods, there are generally difficulties in pellet distribution at the edges of the vertical shaft furnace. Specifically, the distribution density of pellets at the edges of the furnace is much lower than in the center, resulting in a noticeable sparse distribution at the edges. In principle, reciprocating feeders, due to the limitations of the trolley's movement trajectory, have blind spots near the furnace wall, preventing effective pellet coverage. Furthermore, neither of these feeders can precisely control the pellet landing point and distribution density when dealing with the circular cross-section of the vertical shaft furnace, further exacerbating the problem of uneven pellet distribution at the edges.

[0005] The difficulty in edge pellet distribution directly impacts the pellet roasting and sintering effect. On one hand, sparse pellets at the edges prevent sufficient heat absorption near the furnace wall, creating localized high-temperature zones. Conversely, dense pellets in the center may lead to insufficient heat and incomplete sintering, resulting in disordered temperature distribution within the furnace. Ultimately, this leads to unstable pellet quality, frequent uneven roasting, and a significantly increased defect rate. On the other hand, to improve localized sintering, companies often need to adjust the roasting temperature or extend the roasting time. This not only reduces the unit-time capacity of the vertical shaft furnace but also increases energy consumption. Utility Model Content

[0006] The purpose of this invention is to solve the problem that the existing pellet feeder cannot properly distribute the pellets at the edge of the vertical furnace body, thus affecting the pellet sintering effect, and to provide a uniform material structure for pellet sintering.

[0007] To address the shortcomings of the aforementioned technical problems, the present invention adopts the following technical solution: a uniform material structure for pellet sintering, comprising an intermittent deflection assembly disposed on a conveying roller and a material distributor connected to the intermittent deflection assembly; The intermittent deflection assembly includes a guide rail and two transmission sleeves that are rotatably mounted at both ends of the transmission roller. The transmission sleeves are provided with cam plates, and a sliding column is fixedly provided at the center of the protrusion of the cam plate. The sliding column is slidably connected to the guide groove opened on the guide rail. The fabric feeder includes a first support plate and a second support plate disposed on the transmission sleeve; a first baffle is disposed between the two first support plates, and a second baffle is disposed between the two second support plates; The guide groove includes a first deflection section, a horizontal section, and a second deflection section connected in sequence. The first deflection section and the second deflection section are closer to the axis of the transmission roller than the horizontal section, so as to adjust the posture of the first baffle and the second baffle at different positions.

[0008] As a further optimization of the uniform material structure for pellet sintering of this utility model: the guide groove is provided through the guide rail, and the two ends of the sliding column that protrude from the guide groove are fixedly connected to the cam plate, and the center of the two cam plates connected to the two ends of the sliding column is fixedly connected to the same transmission sleeve.

[0009] As a further optimization of the homogenization structure for pellet sintering of this utility model: inclined transition sections are provided between the first deflection part and the horizontal part, and between the second deflection part and the horizontal part.

[0010] As a further optimization of the uniform material structure for pellet sintering of this utility model: multiple countersunk grooves are uniformly opened in the length direction of the guide rail, and expansion screws are provided in each of the multiple countersunk grooves.

[0011] As a further optimization of the homogenization structure for pellet sintering of this utility model: the transmission roller is rotatably connected to the transmission sleeve through a bearing.

[0012] As a further optimization of the homogenization structure for pellet sintering of this utility model: both the first baffle and the second baffle are provided with a wear-resistant layer on their outer periphery.

[0013] As a further optimization of the homogenization structure for pellet sintering of this utility model: the outer periphery of both the first baffle and the second baffle is set in an arc shape.

[0014] As a further optimization of the homogenization structure for pellet sintering of this utility model: the first support plate and the second support plate on the same side are distributed in a V shape, and the included angle between the first support plate and the second support plate is 110-120°.

[0015] Compared with the prior art, the present invention has the following beneficial effects: This invention utilizes a guide groove comprising a first deflection part, a second deflection part, and a third deflection part. When the sliding column moves to different positions, a cam plate drives a transmission sleeve, positioning the feeder in different postures. Specifically, the feeder's first support plate, second support plate, first baffle, and second baffle are positioned at the A and B edges above the feed inlet, providing guidance for the pellets' edge sliding. This compensates for the sparse feed at the feed inlet edges of conventional pellet conveying devices. The intermediate area between A and B above the feed inlet employs an unobstructed trajectory design, allowing the pellets to be densely dispersed under gravity and inertia. Ultimately, this achieves a balanced match between the amount of pellets at the upper edge and the intermediate area above the feed inlet, effectively improving the uniformity and consistency of pellet distribution and laying the foundation for uniform heat transfer during subsequent sintering. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the axial side structure of this utility model; Figure 2 This is a top view cross-sectional structural diagram of the present invention; The markings in the diagram are as follows: 1. Intermittent deflection assembly; 101. Guide rail; 102. Expansion screw; 103. Countersunk groove; 104. Guide groove; 1041. First deflection part; 1042. Horizontal part; 1043. Second deflection part; 105. Cam plate; 106. Transmission sleeve; 107. Sliding column; 2. Fabric distributor; 201. First baffle; 202. First support plate; 203. Second support plate; 204. Second baffle; 3. Transfer roller. Detailed Implementation

[0017] To better understand this utility model, the following embodiments further illustrate the content of this utility model, but the content of this utility model is not limited to the following embodiments.

[0018] like Figure 1 As shown, a uniform material distribution structure for pellet sintering includes a feeder 2 and an intermittent deflection assembly 1 connected to the feeder 2. The intermittent deflection assembly 1 can be installed on the transmission roller 3 of the pellet conveying device. During the process of the pellet conveying device driving the transmission roller 3 to circulate and distribute the pellets in the feed inlet of the vertical furnace, the intermittent deflection assembly 1 enables the feeder 2 to be in different self-positions at different positions in the feed inlet. Thus, during the circulatory movement of the pellet conveying device to transport the pellets, it assists the pellet conveying device in evenly distributing the pellets to the two edges and the center of the feed inlet of the vertical furnace.

[0019] like Figure 1 and Figure 2 As shown, the intermittent deflection assembly 1 includes two transmission sleeves 106 rotatably mounted at both ends of the transmission roller 3. Each transmission sleeve 106 is equipped with a cam plate 105. A sliding column 107 is located at the center of the protrusion of the cam plate 105. The sliding column 107 is slidably connected to a guide groove 104, which is formed on a guide rail 101 fixed to the inner wall of the feed inlet. The guide groove 104 includes a first deflection section 1041, a horizontal section 1042, and a second deflection section 1043, arranged sequentially along the running direction of the pellet conveying device at the feed inlet. The heights of the first deflection section 1041 and the second deflection section 1043 are higher than the height of the horizontal section 1042. Therefore, when the sliding column 107 moves to the first deflection section 1041 and the second deflection section 1043, the height of the sliding column 107 is raised, thus driving the cam plate 105 to deflect. Specifically, the guide groove 104 extends through the guide rail 101, and both ends of the sliding column 107 extending out of the guide groove 104 are fixedly connected to the center of the protruding end of the cam plate 105. The rotation centers of the two cam plates 105 are fixedly connected to the same transmission sleeve 106. The arrangement of the two transmission sleeves 106 maintains the stability of the connection between the transmission sleeve 106 and the sliding column 107, while also maintaining the stability of the connection between the sliding column 107 and the guide groove 104.

[0020] The feeder 2 includes a first support plate 202 and a second support plate 203 fixedly disposed on the outer periphery of the transmission sleeve 106. The first support plate 202 and the second support plate 203 form a V-shaped plate, and the included angle between the first support plate 202 and the second support plate 203 is 110° to 120°. A first baffle 201 is provided between the two first support plates 202, and a second baffle 204 is provided between the two second support plates 203. When the cam plate 105 deflects, the feeder 2 can be synchronously deflected through the transmission sleeve 106. Even if the first baffle 201 or the second baffle 204 is located on the path of the pellets discharged by the pellet conveying device after deflection, that is, when the pellet conveying device moves to the upper edge of the feed inlet, more of the pellets can be guided and sent to the edge A or B above the feed inlet, thereby improving the uniformity of the feeder at the upper edge A or B of the feed inlet. When the sliding column 107 slides on the horizontal part 1042, the weight of the feeder 2 will cause the weight of the sliding column 107 on the cam plate 105 to swing downward through the transmission sleeve 106. At the same time, the first baffle 201 and the second baffle 204 will be flipped and reset to their initial positions by the restriction of the horizontal part 1042. Even if the first baffle 201 and the second baffle 204 are not on the path of the pellets discharged from the pellet conveying device, the pellets will be evenly distributed in the area between A and B above the feed inlet.

[0021] Multiple countersunk grooves 103 are evenly provided on the guide rail 101, and expansion screws 102 are provided in each of the countersunk grooves 103. The expansion screws 102 can fix the guide rail 101 to the inner wall above the feed port. The tightening force of the expansion screws 102 forms a firm connection between the guide rail 101 and the inner wall above the feed port, reducing the displacement or loosening of the limit rail during the sliding process of the cam plate 105 and the guide rail 101. The rotational connection between the transmission roller 3 and the transmission sleeve 106 adopts a bearing structure. The rolling elements inside the bearing can convert the sliding friction between the transmission roller 3 and the transmission sleeve 106 into rolling friction, which significantly reduces the frictional resistance between the two. This allows the transmission sleeve 106 to rotate more flexibly with the rotation of the cam plate 105, ensuring no significant energy loss during power transmission. This makes the deflection adjustment action of the fabric distributor 2 more precise and sensitive, further improving the reliability of the fabric guidance.

[0022] When the pellet conveying device moves to point A above the feed inlet, the sliding column 107 on the cam plate 105 connects with the first deflector 1041 and is raised. This, in turn, drives the transmission sleeve 106 to rotate, causing the second baffle 204 to deflect accordingly, forming an inclined guide surface towards point A. This inclined guide surface provides an inclined support surface for the falling pellets. As the pellets slide down the guide surface under gravity, their original parabolic trajectory is altered, resulting in a concentrated distribution of pellets towards the edge at point A. This effectively solves the problem of sparse pellet distribution at point A due to the lack of edge guidance in conventional fabrics. When the pellet conveying device moves to the other edge B of the feed inlet, the sliding column 107 on the cam plate 105 can cooperate with the second deflection part 1043, so that the sliding column 107 of the cam plate 105 is raised and tilted. At this time, the torque generated by the transmission sleeve 106 will be opposite to that at point A, thereby causing the transmission sleeve 106 to drive the fabric rack to rotate in the opposite direction, causing the first baffle 201 to deflect and form a guide surface towards point B. When the pellets are discharged by the conveyor chain plate, the pellets will collide with the first baffle 201 and be guided by the guide surface formed by the first baffle 201 to fall towards the edge of point B, thereby achieving a concentrated distribution of pellets at the edge of point B, and thus achieving a balanced match between the amount of pellets in the middle area between A and B above the feed inlet and the edges of A and B. When the pellet conveying device is in the middle area between A and B, as the cam plate 105 moves with the moving frame, the sliding column 107 and the horizontal part 1042 on the cam plate 105 slide together, so that the cam plate 105 and the sliding column 107 are slightly tilted, keeping the feeder 2 in its initial state. This ensures that the first baffle 201 and the second baffle 204 remain in their initial positions, thus ensuring that there are no obstructions on the trajectory of the conveyor chain plate transmitting and discharging the pellets. With no obstructions on the trajectory of the conveyor chain plate transmitting and discharging the pellets, the pellets will fall in an approximately parabolic manner after being conveyed by the conveyor chain plate to the top of the feed inlet. At the same time, since the moving frame is in a continuous state of movement, the pellets will move synchronously with the moving frame in the horizontal direction, eventually forming a uniform distribution in the section between A and B, with small gaps between the pellets, achieving a dense and uniform feeding effect.

[0023] Both the first baffle 201 and the second baffle 204 have wear-resistant layers on their surfaces. These layers reduce damage to the first baffle 201 and the second baffle 204 when the pellets impact them, thus maintaining their structural functionality. Furthermore, the outer peripheries of both the first baffle 201 and the second baffle 204 are arc-shaped, further reducing the probability of peripheral collisions causing deflection interference during the deflection and attitude adjustment process.

[0024] In this embodiment, the specific models and materials of the wear-resistant layer, the transmission roller 3, and the pellet conveying device should all be understood as existing technology.

[0025] The specific embodiments of this utility model have been described above. It should be understood that this utility model is not limited to the specific embodiments described above, and those skilled in the art can make various modifications or variations within the scope of the claims, which do not affect the substantive content of this utility model.

Claims

1. A homogeneous material structure for pellet sintering, characterized in that: It includes an intermittent deflection assembly (1) mounted on a transfer roller (3) and a fabric feeder (2) connected to the intermittent deflection assembly (1). The intermittent deflection assembly includes a guide rail (101) and two transmission sleeves (106) that are rotatably disposed at both ends of the transmission roller (3). A cam plate (105) is provided on the transmission sleeve (106), and a sliding column (107) is fixedly provided at the center of the protrusion of the cam plate (105). The sliding column (107) is slidably connected to the guide groove (104) opened on the guide rail (101). The fabric feeder (2) includes a first support plate (202) and a second support plate (203) disposed on the transmission sleeve (106); a first baffle (201) is provided between the two first support plates (202), and a second baffle (204) is provided between the two second support plates (203). The guide groove (104) includes a first deflection part (1041), a horizontal part (1042) and a second deflection part (1043) connected in sequence. The first deflection part (1041) and the second deflection part (1043) are closer to the axis of the transmission roller (3) than the horizontal part (1042) so as to adjust the posture of the first baffle (201) and the second baffle (204) at different positions.

2. The homogeneous material structure for pellet sintering as described in claim 1, characterized in that: The guide groove (104) is provided through the guide rail (101). The sliding column (107) is fixedly connected to the two ends of the guide groove (104) with cam plates (105). The center of the two cam plates (105) connected to the two ends of the sliding column (107) is fixedly connected to the same transmission sleeve (106).

3. The homogeneous material structure for pellet sintering as described in claim 1, characterized in that: An inclined transition section is provided between the first deflection section (1041) and the horizontal section (1042) and between the second deflection section (1043) and the horizontal section (1042).

4. The homogeneous material structure for pellet sintering as described in claim 1, characterized in that: The guide rail (101) has multiple countersunk grooves (103) evenly distributed along its length, and each countersunk groove (103) is provided with an expansion screw (102).

5. The homogeneous material structure for pellet sintering as described in claim 1, characterized in that: The transmission roller (3) is rotatably connected to the transmission sleeve (106) via a bearing.

6. The homogeneous material structure for pellet sintering as described in claim 1, characterized in that: The first baffle (201) and the second baffle (204) are both provided with wear-resistant layers on their outer periphery.

7. The homogeneous material structure for pellet sintering as described in claim 1, characterized in that: The outer periphery of the first baffle (201) and the second baffle (204) are both arc-shaped.

8. The homogeneous material structure for pellet sintering as described in claim 1, characterized in that: The first support plate (202) and the second support plate (203) on the same side are arranged in a V-shape, and the included angle between the first support plate (202) and the second support plate (203) is 110 to 120°.

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