A sinter transfer chute

Abstract

The utility model discloses a chute for sinter transfer belongs to sinter technical field, including the chute body, is equipped with the feed inlet in the top of chute body, is equipped with the discharge gate in the bottom of chute body, is equipped with the guide ladder in the inner chamber of chute body, wherein: the guide ladder includes n horizontal boards and n vertical boards, and n is the natural number greater than 1, and the height of n horizontal boards is all different, and the both ends of horizontal board and vertical board are fixedly connected with the inner wall of chute body, and the width of horizontal board is equal to the height of vertical board, is equipped with the flow board and arc flow guide plate at the discharge gate, one end of arc flow guide plate is tangent with the bottom of guide ladder, and the flow board is located the top of arc flow guide plate. The utility model discloses in sinter transfer can prevent sinter crushing and reduce sinter flow to the big impact of belt, and can prolong the service life of chute sinter transfer chute.

Description

Technical Field

[0001] This utility model belongs to the field of sintering technology, specifically relating to a sluice for sintering transfer. Background Technology

[0002] After the sintering process is completed, the finished sintered ore slowly enters the screening system from the tail end of the sintering machine. This step is crucial to ensuring the quality of the sintered ore. After meticulous screening, the qualified sintered ore begins its journey to the blast furnace. This journey is not smooth sailing; it involves many complex transfer, screening, and storage / transportation stages, each of which is vital, ensuring the ore's safe arrival at the blast furnace and its indispensable role as a raw material for ironmaking.

[0003] Throughout the entire transportation process of sinter, whether transported by belt conveyor or chute, sinter faces a common challenge—high drop. This high drop is a significant factor leading to frequent falls and impacts during transport. Adding to the problem is the inconsistent quality of sinter; some sinter has relatively low crushing strength. During transportation or transshipment, these lower-strength sinter are easily broken by impacts, which not only reduces the overall quality of the sinter but also significantly increases the return rate. This issue has long plagued steel companies and remains unresolved.

[0004] In recent years, with the rapid development of steel enterprises, steel production has increased year by year. As a key raw material in the ironmaking process, the output of sintered ore must also increase accordingly. However, while pursuing increased production, steel enterprises must also ensure a high yield of finished sintered ore and a low return rate, which places higher demands on their production management. The return rate largely depends on the sintered ore transfer method and the transport material trajectory. Traditional chute designs are often too simple, using only a single inclined chute, making it difficult to meet complex and ever-changing transportation needs. Utility Model Content

[0005] The purpose of this utility model is to meet practical needs and provide a sinter transfer chute that can prevent sinter breakage and reduce the impact of sinter flow on the conveyor belt during sinter transfer, and can extend the chute's service life.

[0006] To achieve the above technical objectives, the purpose of this utility model is to provide a sluice for transferring sintered ore, comprising an inclined sluice body, an inlet at the top of the inclined sluice body, and an outlet at the bottom of the inclined sluice body; a guide step is provided in the inner cavity of the inclined sluice body; wherein: the guide step comprises n horizontal plates and n vertical plates, where n is a natural number greater than 1, and the heights of the n horizontal plates are all different; the two ends of the horizontal and vertical plates are fixedly connected to the inner wall of the inclined sluice body, and the width of the horizontal plate is equal to the height of the vertical plate; a flow-limiting plate and an arc-shaped guide plate are provided at the outlet; one end of the arc-shaped guide plate is tangent to the bottom of the guide step, and the flow-limiting plate is located above the arc-shaped guide plate.

[0007] Preferably, the width of each horizontal plate is equal to 1 / 4 of the width of the inclined chute body.

[0008] Preferred,

[0009] Where L is the length of the inclined chute body, α is the inclination angle of the inclined chute body, and d is the width of each horizontal plate.

[0010] Preferably, the arc center angle of the arc-shaped guide vane is θ.

[0011] θ=α+5°(2);

[0012] Where: α is the inclination angle of the inclined chute body.

[0013] Preferably, the ratio of the length of the flow-limiting plate to the length of the inclined chute body is:

[0014] Preferably, the included angle between the flow restrictor and the inclined chute body is μ, and the range of μ is 20° to 30°.

[0015] Preferably, the inclination angle α of the inclined chute body is in the range of 20° to 60°.

[0016] Preferably, the value of n is in the range of 15 to 30.

[0017] Preferably, a smooth, concave arc plate is provided at the connection between the vertical plate and the horizontal plate, and a horizontally placed triangular prism is provided on the horizontal plate; the radius of the arc of the smooth arc plate is equal to the width d of each horizontal plate.

[0018] Preferably, an outwardly convex outer arc plate is provided at the connection between the horizontal plate and the vertical plate, and the radius of the outer arc plate is equal to the width d of each horizontal plate.

[0019] Preferably, one end of the horizontally placed triangular prism is connected to a smooth circular arc plate and the other end is connected to an outer circular arc plate, and the angle of the apex angle β of the triangular prism is 120° to 150°.

[0020] Preferably, the inner wall of the inclined chute body and the outer surface of the guide steps are provided with wear-resistant liners.

[0021] Compared with the prior art, the advantages and positive effects of this application are:

[0022] 1. This utility model incorporates a guide staircase within the inclined chute, with meticulous structural optimization and a scientifically defined proportional relationship between the staircase and the chute body. The edges connecting the horizontal and vertical plates are rounded, and a horizontally placed triangular prism is positioned on the horizontal plate. This design effectively stores a portion of the sintered ore between the guide staircases. This not only significantly reduces the speed of the sliding sintered ore, but the rounded edges also effectively reduce wear on the staircase edges. The triangular prism effectively disperses the impact force of the sintered ore on the horizontal baffles. This stored sintered ore also serves as a stable base for subsequent sintering, transforming the sintered ore's movement during transport from direct sliding friction with the chute surface to rolling friction between the sintered ore and the stored sintered ore. By specifically setting up a smooth arc plate and a horizontally placed triangular prism, some sintered particles can be better temporarily stored between the triangular prism and the smooth arc plate, enhancing the temporary storage effect. Preferably, by specifically setting the angle of the horizontally placed triangular prism, combined with the radius of curvature of the smooth arc plate, the effect of reducing impact and enhancing temporary storage is further enhanced. By changing the original direct sliding friction with the chute surface to rolling friction between the sinter and the stored sinter, this change in friction mode effectively avoids direct wear on the chute surface, further greatly extending the service life of the sinter transfer chute.

[0023] 2. To effectively mitigate the direct impact between the sinter and the conveyor belt, this invention adds an arc-shaped guide plate to the end of the inclined chute. Through precise arc design and placement, the sinter slides onto the conveyor belt at a relatively gentle speed, further reducing the impact force between the sinter and the conveyor belt. This not only significantly reduces the sinter return rate but also greatly extends the service life of the sinter conveyor belt, improving the stability and efficiency of the entire conveying system.

[0024] 3. At the end of the inclined chute, this invention also features a flow-limiting plate. The main purpose of this design is to prevent splashing of some of the sliding sinter at the chute outlet due to its irregular movement trajectory. The flow-limiting plate not only effectively ensures the sinter moves along its normal trajectory, guaranteeing the stability of the transfer process, but also effectively protects the safety of on-site operators, preventing accidental injuries caused by splashing, and helps maintain a clean and orderly plant environment.

[0025] In summary, through specific and meticulous design, this utility model enables the transfer chute to possess multiple significant features such as anti-breakage, low ore return rate, and long chute life, greatly improving the overall performance and reliability of the sinter transfer system. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 A structural diagram of the sinter transfer chute provided in an embodiment of this utility model is shown.

[0028] Figure 2 A side view of the sinter transfer chute provided in an embodiment of the present invention is shown.

[0029] Figure 3 This diagram shows a partially enlarged schematic of the flow-limiting plate in an embodiment of the present invention;

[0030] Figure 4 This diagram shows a partially enlarged schematic of the stepped structure in an embodiment of the present invention;

[0031] Figure 5 The diagram shows a partially enlarged cross-sectional view of the stepped structure in an embodiment of this utility model.

[0032] The components are: 1. Inlet; 2. Guide steps; 3. Inclined chute body; 4. Flow restrictor; 5. Outlet; 6. Arc-shaped guide plate; 7. Smooth arc plate; 8. Horizontal triangular prism; 9. Outer arc plate; 10. Vertical plate; 11. Horizontal plate. Detailed Implementation

[0033] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0034] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0035] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0036] like Figures 1 to 5 As shown, the present invention provides a sinter transfer chute, comprising:

[0037] The inclined chute body 3 has an internal cavity channel through which sintered ore passes. A feed inlet 1 is provided at the top of the inclined chute body 3, and a discharge outlet 5 is provided at the bottom of the inclined chute body 3.

[0038] A guide step 2 is provided in the inner cavity of the inclined chute body 3; wherein:

[0039] The guide step 2 includes n horizontal plates 11 and n vertical plates 10, where n is a natural number greater than 1. The heights of the n horizontal plates are all different. The two ends of the horizontal and vertical plates are fixedly connected to the inner wall of the inclined chute body 3. The width of the horizontal plate is equal to the height of the vertical plate.

[0040] A flow limiting plate 4 and an arc-shaped guide plate 6 are provided at the discharge port 5; one end of the arc-shaped guide plate 6 is tangent to the bottom of the guide step 2, and the flow limiting plate 4 is located above the arc-shaped guide plate 6.

[0041] To further understand the technical concept of this utility model, the following non-limiting explanation is provided:

[0042] Wear-resistant liners can be installed on the surfaces of the feed inlet 1, the guide steps 2, the inclined chute body 3, the flow restrictor 4, the discharge outlet 5, and the arc-shaped guide plate 6 that are in direct contact with the sinter.

[0043] like Figure 2 As shown, the cross-section of the material guiding step 2 is a plurality of isosceles triangles;

[0044] The length of the leg of the isosceles triangle is 1 / 4 of the width of the inclined chute body.

[0045] The number of isosceles triangles in the material guide step 2 is n, which satisfies the requirement of equation (1);

[0046]

[0047] Where L is the length of the inclined chute body, α is the inclination angle of the inclined chute body, and d is the length of the leg of the isosceles triangle.

[0048] The arc-shaped guide plate 6 is tangent to the inclined chute body 3 at the junction.

[0049] The arc center angle of the arc-shaped guide vane 6 is θ, which satisfies the requirements of equation (2);

[0050] θ=α+5°(2);

[0051] Where: α: is the inclination angle of the inclined chute body.

[0052] The ratio of the length of the flow restrictor 4 to the length of the inclined chute body is 1:(4.5~5.6).

[0053] The included angle between the flow restrictor 4 and the inclined chute body 3 is μ, where μ ranges from 20° to 30°.

[0054] The inclination angle α of the inclined chute body 3 is 20° to 60°.

[0055] The number of isosceles triangles is between 15 and 30.

[0056] The radius of the arc of the smooth circular arc plate 7 is equal to the width d of each horizontal plate.

[0057] The radius of the outer arc plate 9 is equal to the width d of each horizontal plate.

[0058] A horizontal triangular prism 8 is connected to a smooth circular arc plate 7 and an outer circular arc plate 9 on the horizontal plate. The angle β of the horizontal triangular prism 8 is in the range of 120° to 150°.

[0059] Example 1

[0060] As attached Figure 1 As shown, a long-life, anti-breakage sinter transfer chute includes an inclined chute body 3. The chute body includes a feed inlet 1 at the top, which is connected to a feeding device or belt, and a discharge outlet 5 at the bottom, which is connected to a discharge belt. A guide step 2 is provided inside the inclined chute. An arc-shaped guide plate 6 and a flow-limiting plate 4 are provided at the end of the inclined chute. The size of the top feed inlet 1 is determined by the size of the feeding device or belt. The feed inlet 1 is fixedly connected to the chute body 3, and the inclined chute body 3 is fixedly connected to the chute discharge outlet. The guide step 2 inside the chute is fixedly connected to the inclined chute body 3, storing a certain amount of sinter to slow down the downward flow of sinter and protect the chute. The flow-limiting plate 4 and the arc-shaped guide plate 6 are both fixedly connected to the inclined chute body 3. The flow-limiting plate 4 prevents the downward flow of sinter from splashing at the discharge outlet 5, and the arc-shaped guide plate 6 further reduces the impact between the sinter and the transfer belt.

[0061] In this embodiment, wear-resistant liners are installed on the surfaces of the sluice inlet 1, the guide steps 2, the inclined sluice 3, the flow restrictor 4, the outlet 5, and the arc-shaped guide plate 6 that are in direct contact with the sinter, which helps to extend the service life of the sluice.

[0062] In this embodiment, the inclined chute has an inclination angle of 45°, a cross-sectional width of 600mm, and a length of 4200mm.

[0063] In this embodiment, the guide steps 2 inside the inclined chute 3 are isosceles triangles with a leg length of 150mm and a number of 18. The smooth arc plate 7 has a radius of 50mm, the outer arc plate 9 has a radius of 20mm, and the angle β of the horizontally placed triangular prism on the transverse plate is 130°.

[0064] In this embodiment, the central angle of the arc-shaped guide plate 6 at the end of the inclined chute 3 is 50°.

[0065] In this embodiment, the acute angle between the inclined chute 3 and the end flow restrictor 4 is 25°, and the length is 1000mm.

[0066] In this embodiment, a smooth, concave arc plate 7 is provided between the end of the vertical plate and the beginning of the horizontal plate, a horizontally placed triangular prism 8 is provided on the horizontal plate, and an outwardly convex arc plate 9 is provided at the junction of the end of each horizontal plate and the beginning of the vertical plate.

[0067] In this embodiment, a certain amount of sinter can be stored between the guide steps 2 inside the inclined chute 3, covering the surfaces of the guide steps 2 and the inclined chute 3. This prevents the sinter from wearing down the guide steps 2 and the inclined chute 3, extending the service life of the chute. The sliding friction between the sinter and the chute is transformed into rolling friction between sinter and sinter, reducing the sinter's downward speed and the impact force between the sinter and the conveyor belt and chute, further reducing the sinter return rate. The arc-shaped guide plate 6 allows the sinter to slide slowly onto the conveyor belt, reducing the impact force between the sinter and the conveyor belt and extending the service life of the conveyor belt. The flow-limiting plate 4 prevents some irregularly moving sinter from splashing when exiting the chute, protecting on-site personnel and maintaining the plant environment.

[0068] Example 2

[0069] This embodiment is basically the same in structure as Embodiment 1, except that: the inclined chute angle is set to 35°, the cross-sectional width is 500mm, and the length of the inclined chute is 5300mm. The guide step waist length is 125mm, the number of isosceles triangles is 35, the radius of the smooth arc plate 7 is 42mm, the radius of the outer arc plate 9 is 17mm, the angle β of the triangular prism on the transverse plate is 120°, the corresponding central angle of the arc guide plate is 40°, the length of the flow limiting plate is 1200mm, and the angle between the inclined chute and the flow limiting plate is 30°. This embodiment is suitable for small-scale sinter production systems or large transfer plants, and can effectively reduce the breakage rate of sinter while meeting different production needs.

[0070] Example 3

[0071] This embodiment is basically the same in structure as Embodiment 1, except that: the inclination angle of the inclined chute is set to 50°, the cross-sectional width is 660mm, and the length of the inclined chute is 4000mm. The waist length of the guide step is 165mm, the number of isosceles triangles is 16, the radius of the smooth arc plate 7 is 55mm, the radius of the outer arc plate 9 is 22mm, the angle β of the triangular prism on the transverse plate is 140°, the central angle of the arc guide plate is 55°, the length of the flow limiting plate is 800mm, and the angle between the inclined chute and the flow limiting plate is 15°. This embodiment is suitable for large-scale sinter production systems or situations where the transfer plant is small. It can effectively reduce the breakage rate of sinter and meet the production requirements of large blast furnaces, high sinter flow rates, and high efficiency.

[0072] Analysis of the sinter flow rate in the sluice, wear of the inclined sluice body, and the proportion of sinter particles smaller than 5mm in Examples 1, 2, and 3 revealed that the larger the inclination angle of the inclined sluice, the smaller the space occupied by the transfer sluice, but the higher the sinter flow rate in the sluice, the greater the amount of finished sinter that can be transferred per unit time. The different speeds at which the finished sinter reaches the transfer belt cause the proportion of sinter particles smaller than 5mm to increase by about 0.2% as the sluice inclination angle increases, thus increasing the sinter return rate. However, since sinter can be stored in the feed step, the wear on the sluice body is basically the same regardless of the sluice inclination angle.

[0073] Comparative Example 1

[0074] The other settings of this comparative example are the same as those in Example 1, except that no guide steps are provided. A comparative test was conducted for 22 hours, identical to that in Example 1. It was found that the surface wear of the inclined chute body in this comparative example was 0.25% of its overall thickness, while Example 1 showed no wear at all. Measurements were taken of the finished sinter in this comparative example, where the sinter particle size distribution was smaller than 5mm, after passing through the inclined chute without guide steps. The percentage of sinter particles smaller than 5mm changed from 3.78% to 8.46%, a change of 4.68%. In contrast, measurements were taken of the finished sinter in Example 1, where the sinter particle size distribution was smaller than 5mm, after passing through the inclined chute with guide steps. The percentage of sinter particles smaller than 5mm changed from 3.78% to 4.23%, a change of 0.45%. In conclusion, inclined chutes with guide steps can extend the service life of transfer chutes and reduce the return rate of sinter.

[0075] The above description is only a preferred embodiment of the present utility model. It should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A sluice for transferring sintered ore, comprising an inclined sluice body (3), wherein a feed inlet (1) is provided at the top of the inclined sluice body (3), and a discharge outlet (5) is provided at the bottom of the inclined sluice body (3); characterized in that, A guide step (2) is provided in the inner cavity of the inclined chute body (3); wherein: The guide step (2) includes n horizontal plates and n vertical plates, where n is a natural number greater than 1. The heights of the n horizontal plates are all different. The two ends of the horizontal plates and the vertical plates are fixedly connected to the inner wall of the inclined chute body (3). The width of the horizontal plate is equal to the height of the vertical plate. A flow limiting plate (4) and an arc-shaped guide plate (6) are provided at the discharge port (5); one end of the arc-shaped guide plate (6) is tangent to the bottom of the guide step (2), and the flow limiting plate (4) is located above the arc-shaped guide plate (6).

2. The sluice for sinter transfer according to claim 1, characterized in that, The width of each horizontal plate is equal to 1 / 4 of the width of the inclined chute body (3).

3. The sluice for sinter transfer according to claim 1, characterized in that: Where L is the length of the inclined chute body, α is the inclination angle of the inclined chute body, and d is the width of each horizontal plate.

4. The sluice for sinter transfer according to claim 1, characterized in that, The arc center angle of the arc-shaped guide plate (6) is θ. θ=α+5° (2); Where: α is the inclination angle of the inclined chute body.

5. The sluice for sinter transfer according to claim 1, characterized in that, The ratio of the length of the flow-limiting plate (4) to the length of the inclined chute body (3) is:

6. The sluice for sinter transfer according to claim 1, characterized in that, The angle between the flow limiting plate (4) and the inclined chute body (3) is μ, and the range of μ is 20° to 30°.

7. The sluice for sinter transfer according to claim 1, characterized in that, The tilt angle α of the inclined chute body (3) ranges from 20° to 60°.

8. The sluice for sinter transfer according to claim 1, characterized in that, The value of n ranges from 15 to 30.

9. The sluice for sinter transfer according to claim 1, characterized in that, A smooth, concave arc plate (7) is provided at the connection between the vertical plate and the horizontal plate, and a horizontally placed triangular prism (8) is provided on the horizontal plate; the radius of the arc of the smooth arc plate (7) is equal to the width d of each horizontal plate.

10. The sluice for sinter transfer according to claim 1, characterized in that, An outwardly convex outer arc plate (9) is provided at the connection between the horizontal plate and the vertical plate. The radius of the arc of the outer arc plate (9) is equal to the width d of each horizontal plate.

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