Green ball screening blocking mechanism

Abstract

A kind of green ball screening blocking mechanism, specifically relates to a kind of blocking mechanism for optimizing green ball screening process.The guide vane is of sectional structure, the upper part is upper guide vane, the lower part is lower guide vane, lower guide vane and upper guide vane are not parallel, guide baffle is provided with several blocks, and is set on lower guide vane, guide vane is provided with several angle steel reinforcement, several angle steel reinforcement constitutes bucket structure, angle steel reinforcement top is provided with pivot structure, pivot structure upper side is provided with lifting tackle, lifting tackle is connected with upper guide vane by cable.By setting a guide vane controlled by lifting tackle between belt conveyor and round roller screen, and setting inclined guide baffle on guide vane to shunt and block the falling green ball, not only reduce the falling height of green ball and not easy to break, but also can expand the falling area of green ball, so as to be more beneficial to screening, reduce the probability of qualified green ball being screened out, improve the effectiveness of screening.

Description

Technical Field

[0001] This utility model relates to a green ball screening blocking mechanism, specifically a blocking mechanism that optimizes the green ball screening process. Background Technology

[0002] Artificial rich iron ore can be divided into two categories: sinter and pellets. Sinter is suitable for agglomerating coarse-grained rich ore powder, while pellets are suitable for forming fine-grained iron concentrate. Pellets are further divided into compressed pellets and briquettes. Pelletites are formed by rolling, with a diameter of approximately 10 mm and uniform particle size. After roasting and consolidation, they possess sufficient mechanical strength and metallurgical properties, meeting the requirements of blast furnace ironmaking and allowing for long-distance transportation and storage. Compared to sinter, due to the different consolidation mechanism, pellets can use high-grade iron concentrate and have no requirements on silica content, potentially reducing blast furnace slag volume to a lower level. Oxidized roasted pellets, like sinter, have become a major raw material for modern blast furnace ironmaking.

[0003] In the actual production of pellets, after the mixture is pelletized by the pelletizing disc, the pellets exiting the disc have an unreasonable particle size distribution, with green pellets of 5-20mm size accounting for a certain proportion. Therefore, it is necessary to screen out the small and large green pellets, and only green pellets of 8-16mm size can enter the roasting machine for roasting. The green pellets exiting the pelletizing disc are transported by belt conveyor to a roller screen for screening. First, green pellets larger than 16mm are screened out. However, the existing process has two problems: firstly, due to the large drop, the green pellets are easily broken (or cracked), affecting the quality of the green pellets; secondly, the screening area of ​​the roller screen is not fully utilized, resulting in low screening efficiency, and a small portion of qualified green pellets are screened out. Utility Model Content

[0004] The purpose of this invention is to address the deficiencies or shortcomings in the existing technology by providing a green ball screening blocking mechanism. This mechanism involves setting a guide plate, which can be controlled by a lifting hoist, between the belt conveyor and the roller screen. An inclined guide baffle is then installed on the guide plate to divert and block the falling green balls. This not only reduces the falling height of the green balls, making them less prone to breakage, but also increases the falling area of ​​the green balls, thereby facilitating screening, reducing the probability of qualified green balls being screened out, and improving the effectiveness of screening.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: it includes a guide plate 1 and a guide baffle 2. The guide plate 1 has a segmented structure, with an upper guide plate 11 at the top and a lower guide plate 12 at the bottom. The lower guide plate 12 and the upper guide plate 11 are not parallel. The guide baffle 2 consists of several pieces and is set on the lower guide plate 12. The guide plate 1 is provided with several angle steel ribs 3, which form a bucket-shaped structure. The top of the angle steel ribs 3 is provided with a rotating shaft structure, and a lifting hoist 4 is provided on one side above the rotating shaft structure. The lifting hoist 4 is connected to the upper guide plate 11 through a cable 8.

[0006] Furthermore, several of the aforementioned flow guide baffles 2 are arranged in a shape that is narrower at the top and wider at the bottom.

[0007] Furthermore, the width of the lower guide plate 12 is greater than the width of the upper guide plate 11.

[0008] Furthermore, a wear-resistant belt 7 is provided on the lower guide plate 12.

[0009] Furthermore, the rotating shaft structure includes a round steel support rod 5 and a sleeve rotating shaft 6, with several bearings on the round steel support rod 5 connected to the sleeve rotating shaft 6.

[0010] Furthermore, the guide plate 1 is located at the front end of the belt conveyor 9, and the upper edge of the upper guide plate 11 is higher than the upper surface of the belt conveyor 8, while the lower edge of the lower guide plate 12 is lower than the lower surface of the belt conveyor 9 and close to the circular roller screen 10.

[0011] Furthermore, the angle between the lower guide plate 12 and the upper guide plate 11 is 130°-165°, and the lower guide plate 12 is inclined toward the belt conveyor 9.

[0012] After adopting the above technical solution, the beneficial effects of this utility model are as follows: by setting a guide plate that can be controlled by a lifting hoist between the belt conveyor and the roller screen, and setting an inclined guide baffle on the guide plate to divert and block the falling green balls, not only is the falling height of the green balls reduced and less prone to breakage, but the falling area of ​​the green balls is also expanded, which is more conducive to screening, reduces the probability of qualified green balls being screened out, and improves the effectiveness of screening. Attached Figure Description

[0013] 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.

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 yes Figure 1 The second angle view;

[0016] Figure 3 This is a schematic diagram illustrating the installation and use effect of this utility model;

[0017] Figure 4 This is a schematic diagram of the existing green pellet screening process.

[0018] Explanation of reference numerals in the attached drawings: 1. Guide plate; 2. Guide baffle; 3. Angle steel tie rod; 4. Lifting hoist; 5. Round steel support rod; 6. Sleeve shaft; 7. Wear-resistant belt; 8. Cable; 9. Belt conveyor; 10. Circular roller screen; 11. Upper guide plate; 12. Guide plate. Detailed Implementation

[0019] See Figures 1-4 As shown, the technical solution adopted in this specific embodiment is as follows: It includes a guide plate 1 and a guide baffle 2. The guide plate 1 has a segmented structure, with an upper guide plate 11 at the top and a lower guide plate 12 at the bottom. The lower guide plate 12 and the upper guide plate 11 are not parallel. Several guide baffles 2 are provided and are set on the lower guide plate 12. Several angle steel ribs 3 are provided on the guide plate 1, and the angle steel ribs 3 form a bucket-shaped structure. A rotating shaft structure is provided at the top of the angle steel ribs 3, and a lifting hoist 4 is provided on one side above the rotating shaft structure. The lifting hoist 4 is connected to the upper guide plate 11 through a cable 8. When the existing green balls are conveyed to the rotary screen by the belt conveyor, they fall directly from the front end of the belt conveyor and move a certain distance towards the front end under the action of inertia. Therefore, the collision force with the rotary screen is relatively large, which makes some green balls prone to breakage. In addition to the damage situation, since a large number of green balls accumulate in one direction at the same time, some qualified green balls are also transported to the unqualified area due to untimely screening, which requires multiple screenings and affects efficiency. Therefore, in this embodiment, a movable blocking structure is set up, in which the guide plate is the main blocking body, the guide plate is equipped with a guide baffle, and several angle steel ribs are welded on the guide plate to form a bucket-shaped structure, which can block the falling green balls. When the green balls are conveyed from the belt conveyor, they will first hit the upper guide plate, and then slide down the lower guide plate. Under the dispersion effect of the guide baffle, they fall onto the roller screen. Since the green balls pass through the guide plate, it is equivalent to passing through a buffer, which not only reduces the falling height of the green balls, but also reduces the impact force between the green balls and the roller screen, so it is not easy to damage the green balls.

[0020] In addition, when a large amount of dust accumulates on the guide plate, affecting the efficiency of the green balls falling, the lifting hoist can be activated to drive the guide plate to rotate around the shaft structure via the cable, thus making it convenient for operators to clean the guide plate.

[0021] More specifically, the aforementioned guide baffles 2 are arranged in a shape that is narrower at the top and wider at the bottom. The width of the lower guide plate 12 is greater than the width of the upper guide plate 11. In this embodiment, the entire guide plate, together with the angle steel tie rod, forms a bucket-shaped structure that is narrower at the top and wider at the bottom. Therefore, the guide baffles are also vertically arranged on the lower guide plate and are also arranged in a shape that is narrower at the top and wider at the bottom. When the green balls fall from the upper guide plate, they are dispersed to both sides under the guidance of the guide baffles, which can effectively prevent the green balls from falling in a concentrated manner. This is conducive to expanding the screening area of ​​the green balls and makes it less likely for qualified green balls to be mistakenly screened, thus effectively improving the screening efficiency of green balls.

[0022] More specifically, the lower guide plate 12 is provided with a wear-resistant belt 7. In this embodiment, since the upper guide plate is the direct impact position of the green balls, a wear-resistant belt is provided on it for buffering, which further reduces the impact force when the green balls fall, and can also effectively prevent the green balls from being damaged, as well as prevent the upper guide plate from being damaged, thus extending the service life of the equipment.

[0023] More specifically, the rotating shaft structure includes a round steel support rod 5 and a sleeve rotating shaft 6. Several bearings are provided on the round steel support rod 5 and connected to the sleeve rotating shaft 6. In this embodiment, the rotating shaft structure is mainly composed of the round steel support rod and the sleeve rotating shaft. Several bearings are provided on the round steel support rod and connected to the sleeve rotating shaft. After the sleeve rotating shaft is connected to the angle steel tie rod, the guide plate can rotate around the round steel support rod under the traction of the lifting hoist. When installing this equipment, two fixed brackets need to be installed first, one high and one low. The rotating shaft structure is installed at the lower position, and the lifting hoist is installed at the higher position. The two fixed brackets are staggered so that the guide plate can be effectively driven to rotate when the lifting hoist is started.

[0024] More specifically, the guide plate 1 is located at the front end of the belt conveyor 9, with the upper edge of the upper guide plate 11 higher than the upper surface of the belt conveyor 9, and the lower edge of the lower guide plate 12 lower than the lower surface of the belt conveyor 9 and close to the roller screen 10. In this embodiment, the guide plate is located before the belt conveyor and the roller screen, with the upper edge of the upper guide plate higher than the upper surface of the belt conveyor. When the green balls are conveyed out, they can fall onto the upper guide plate without exceeding its upper edge. The lower guide plate is tilted and located close to the belt conveyor, and must be lower than the lower surface of the belt conveyor. When the green balls fall from the lower guide plate, they will try to move closer to the top of the roller screen. Traditional screening equipment will continue to move forward a distance due to inertia when the green balls fall, resulting in a large area of ​​the upper part of the roller screen not contacting the green balls, thus limiting the utilization efficiency of the roller screen. However, in this embodiment, the guide plate is designed in segments, and the lower guide plate is closer to the belt conveyor, thus the landing point of the green balls can be moved upward, expanding the application range of the roller screen and improving the screening effectiveness of the green balls.

[0025] More specifically, the angle between the lower guide plate 12 and the upper guide plate 11 is 130°-165°, and the lower guide plate 12 is inclined toward the belt conveyor 9. In this embodiment, the inclination range of the lower guide plate is customized according to the specific settings of the circular roller screen, thereby effectively increasing the screening area and improving the screening effectiveness.

[0026] The working principle of this utility model is as follows: During equipment installation, two fixed supports, one high and one low, are first set above the front end of the belt conveyor 9. The rotating shaft structure is installed on the lower fixed support, and the lifting hoist 4 is installed on the higher fixed support. The higher fixed support is not perpendicular to the lower fixed support in space and needs to be set away from the belt conveyor 9. Then, the angle steel tie rod 3 is welded to the bottom of the sleeve rotating shaft 6. Then, the cable 8 is led down from the lifting hoist 4 and connected to the upper edge of the upper guide plate 11, so that the lifting hoist 4, the rotating shaft structure, and the guide plate 2 form a triangular structure in space. When the belt conveyor 9 is started, the raw balls fall from the front end of the belt conveyor 9 to the upper guide plate 11. When they slide down to the lower guide plate 12, they are guided by the guide baffle 2 and undergo multi-directional flow. The dispersion of the balls is achieved because the lower guide plate 12 is inclined and close to the belt conveyor 9 and the roller screen 10. The balls will not fall directly onto the roller screen 10. After impacting the upper guide plate 11, they are dispersed by the guide baffle 2 and fall onto the roller screen 10 without being damaged. At the same time, under the inclined guiding effect of the lower guide plate 12, the balls will fall to a position closer to the top of the roller screen 10, which also improves the screening range. Qualified balls can better contact the roller screen 10 and fall into the bottom collection device, while unqualified balls are conveyed downwards for further processing. When a lot of dust accumulates on the guide plate 2, the guide plate 2 is lifted by the lifting hoist 4 and the cable 8, which makes it easy to clean the guide plate 2.

[0027] The above description is only used to illustrate the technical solution of this utility model and is not intended to limit it. Any other modifications or equivalent substitutions made by those skilled in the art to the technical solution of this utility model, as long as they do not depart from the spirit and scope of the technical solution of this utility model, should be covered within the scope of the claims of this utility model.

Claims

1. A green pellet screening and blocking mechanism, characterized in that: It includes a guide plate (1) and a guide baffle (2). The guide plate (1) has a segmented structure, with an upper guide plate (11) at the top and a lower guide plate (12) at the bottom. The lower guide plate (12) and the upper guide plate (11) are not parallel. The guide baffle (2) has several pieces and is set on the lower guide plate (12). The guide plate (1) has several angle steel ties (3), which form a bucket-shaped structure. The top of the angle steel ties (3) has a rotating shaft structure, and a lifting hoist (4) is set on one side above the rotating shaft structure. The lifting hoist (4) is connected to the upper guide plate (11) through a cable (8).

2. The green pellet screening and blocking mechanism according to claim 1, characterized in that: Several of the aforementioned flow guide baffles (2) are arranged in a shape that is narrow at the top and wide at the bottom.

3. The green pellet screening and blocking mechanism according to claim 1, characterized in that: The width of the lower guide plate (12) is greater than the width of the upper guide plate (11).

4. The green pellet screening and blocking mechanism according to claim 1, characterized in that: The lower guide plate (12) is provided with a wear-resistant belt (7).

5. The green pellet screening and blocking mechanism according to claim 1, characterized in that: The rotating shaft structure includes a round steel support rod (5) and a sleeve rotating shaft (6). Several bearings are provided on the round steel support rod (5) and connected to the sleeve rotating shaft (6).

6. The green pellet screening and blocking mechanism according to claim 1, characterized in that: The guide plate (1) is located at the front end of the belt conveyor (9), and the upper edge of the upper guide plate (11) is higher than the upper surface of the belt conveyor (8), while the lower edge of the lower guide plate (12) is lower than the lower surface of the belt conveyor (9) and close to the circular roller screen (10).

7. The green pellet screening and blocking mechanism according to claim 1, characterized in that: The angle between the lower guide plate (12) and the upper guide plate (11) is 130°-165°, and the lower guide plate (12) is inclined toward the belt conveyor (9).

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