Steel slag grading device

Abstract

The utility model relates to high-temperature steel slag treatment equipment, in particular to a steel slag grading device which comprises a steel slag grading bin and a grading mechanism, the steel slag grading bin is provided with at least two grading outlets, and the grading mechanism is arranged in the steel slag grading bin. The grading mechanism conveys the steel slag to a specified grading outlet according to the particle size of the steel slag in the steel slag grading bin, so that grading of the steel slag is realized; a first interlayer cavity is formed in the bin wall of the steel slag grading bin, a second interlayer cavity is formed in each grading screen of the grading mechanism, the first interlayer cavity is communicated with the second interlayer cavity, and water is continuously introduced into the first interlayer cavity in the steel slag grading treatment process, so that cooling of the steel slag can be realized, and waste heat of the steel slag can be utilized; cooling water is heated into water vapor and then can be led out to be used for power generation and other purposes.

Description

Technical Field

[0001] This utility model relates to high-temperature steel slag treatment equipment, specifically to a steel slag grading device. Background Technology

[0002] Currently, steel slag produced in steelmaking is mostly treated using the hot blanching method. Before hot blanching, the steel slag needs to be cooled to 400-500℃, and there are also certain requirements for the particle size of the steel slag. Existing common methods involve cooling the high-temperature steel slag to a certain temperature range, followed by crushing and grading. However, cooling a large amount of accumulated steel slag takes a long time and results in a waste of heat. The applicant has developed an integrated device that can improve the efficiency of steel slag cooling and crushing. However, when this device is used in conjunction with existing steel slag grading equipment, it still results in a waste of residual heat from the steel slag. Therefore, this applicant proposes a steel slag grading device. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a steel slag grading device that can grade and screen steel slag, and can utilize the waste heat of steel slag during the grading process.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: a steel slag grading device, including a steel slag grading bin and a grading mechanism. The steel slag grading bin is provided with at least two grading outlets. A first interlayer cavity is provided inside the bin wall. The steel slag grading bin is provided with a water injection port and an exhaust port, which are connected to the first interlayer cavity. The grading mechanism is located inside the steel slag grading bin. The grading mechanism sends the steel slag to the designated grading outlet according to the particle size of the steel slag in the grading bin. The grading mechanism includes a grading screen, and a second interlayer cavity is provided inside the grading screen, which is connected to the first interlayer cavity. When the steel slag is graded and screened in the steel slag grading bin, the cooling water in the first and second interlayer cavities of the steel slag grading bin can further cool the steel slag and utilize its residual heat.

[0005] As an optional technical solution of this utility model, the steel slag grading bin is provided with two grading outlets, namely the first grading outlet and the second grading outlet. The grading screen is set above the first grading outlet and sends the small-diameter steel slag that is screened out to the first grading outlet. The grading screen is tilted towards the second grading outlet and sends the large-diameter steel slag that is screened out to the second grading outlet.

[0006] As an optional technical solution of this utility model, the grading screen includes a vibrating grading screen, and a vibrating mounting component is provided above the first grading outlet. The vibrating grading screen is installed at an angle above the first grading outlet through the vibrating mounting component, and is driven to vibrate by a vibrating drive component provided outside the steel slag grading bin.

[0007] As an optional technical solution of this utility model, the steel slag grading bin is provided with a grading inlet, and the grading screen also includes a fixed grading screen, which is inclinedly set below the grading inlet. The fixed grading screen sieves the steel slag and guides it to the vibrating grading screen. The steel slag entering the steel slag grading bin first falls onto the fixed grading screen, which sieves the steel slag and guides it to the vibrating grading screen. The fixed grading screen and the vibrating grading screen work together to grade the steel slag, and the fixed grading screen can prevent the vibrating grading screen from being damaged by the impact of the steel slag for a long time.

[0008] As an optional technical solution of this utility model, the fixed grading screen is connected to the wall of the steel slag grading bin, and the lower end of the fixed grading screen is above the vibrating grading screen.

[0009] As an optional technical solution of this utility model, a double-roll crushing mechanism is provided at the grading inlet.

[0010] As an optional technical solution of this utility model, a single-roller crushing mechanism is provided above the fixed grading screen, and the single-roller crushing mechanism cooperates with the fixed grading screen to crush the steel slag. Alternatively, a double-roller crushing mechanism or a single-roller crushing mechanism can be provided above the fixed grading screen to further crush the steel slag to be graded.

[0011] As an optional technical solution of this utility model, the upper screen surface of the fixed grading screen is an arc-shaped surface.

[0012] As an optional technical solution of this utility model, the fixed grading screen and / or vibrating grading screen includes several component tubes, which are arranged side by side and connected to each other. Each component tube communicates with the interior and forms a second interlayer cavity. The gaps between adjacent component tubes form screen holes.

[0013] Compared with the prior art, the advantages of this utility model are as follows: 1. The slag grading bin has a first interlayer cavity in its wall and a second interlayer cavity in its interior. When the slag is graded in the slag grading bin, it can be further cooled and its residual heat can be fully utilized; 2. The combination of the vibrating grading screen and the fixed grading screen can grade and screen the slag. When the slag enters the slag grading bin, it falls directly onto the fixed grading screen, which can avoid the vibrating grading screen being impacted by the slag for a long time, resulting in positional displacement, deformation or damage; 3. A double-roll crushing mechanism or a single-roll crushing mechanism can also be installed above the fixed grading screen to further crush the slag. Attached Figure Description

[0014] 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.

[0015] Figure 1 This is a schematic diagram of the grading device;

[0016] Figure 2 This is a schematic diagram of the structure of a grading device used in an integrated device that can improve the cooling and crushing efficiency of steel slag.

[0017] In the diagram: 1. Steel slag grading bin, 11. First grading outlet, 12. Second grading outlet, 2. Grading mechanism, 21. Vibrating grading screen, 22. Vibration drive component, 23. Fixed grading screen. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example

[0019] like Figure 1 As shown, a steel slag grading device includes a steel slag grading bin 1 and a grading mechanism 2. The steel slag grading bin 1 is provided with at least two grading outlets. The grading mechanism 2 is located inside the steel slag grading bin 1 and screens the steel slag entering the steel slag grading bin 1. According to the particle size of the steel slag, the steel slag is guided to the designated grading outlet for discharge.

[0020] The steel slag grading bin 1 has a first interlayer cavity inside its wall. The bin is equipped with a water injection port and a venting port, both of which are connected to the first interlayer cavity. The water injection port connects to a water supply pipeline or water source to introduce cooling water into the first interlayer cavity. The venting port connects to a steam pipeline or steam tank to expel the high-temperature steam from the first interlayer cavity. During the grading process in the steel slag grading bin 1, water is continuously supplied to the first interlayer cavity through the water injection port. The water in the first interlayer cavity cools the steel slag, and the residual heat of the steel slag heats the cooling water into steam. The steam, after being discharged through the venting port, can be used for various purposes, including power generation.

[0021] The grading mechanism 2 includes grading screens, each of which has a second interlayer cavity inside. The second interlayer cavity is connected to the first interlayer cavity. During the grading process of steel slag in the steel slag grading bin 1, the cooling water in the first interlayer cavity can flow into the second interlayer cavity, and the heat of the steel slag can also be transferred to the cooling water through the grading screens, which further improves the cooling effect of the steel slag and the utilization effect of the waste heat of the steel slag.

[0022] Specifically, the steel slag grading bin 1 is equipped with two grading outlets, namely the first grading outlet 11 and the second grading outlet 12. The grading screen is set above the first grading outlet 11. After the steel slag falls onto the grading screen, the smaller steel slag particles fall through the screen holes into the first grading outlet 11. The grading screen is tilted so that the larger steel slag particles slide down the screen surface into the second grading outlet 12, thereby achieving the grading of the steel slag.

[0023] Furthermore, the grading screen includes a vibrating grading screen 21. A vibrating mounting component is installed above the first grading outlet 11 inside the steel slag grading bin 1. The vibrating mounting component is a vibrating screen mounting component. The vibrating grading screen 21 is installed at an angle above the first grading outlet 11 through the various vibrating mounting components. A vibrating drive component 22 is installed on the outside of the steel slag grading bin 1. The vibrating drive component 22 is a vibrating motor, or it can be a combination of a drive motor and a vibrator. A through hole is provided on the bin wall of the steel slag grading bin 1. A connecting rod structure is installed in the through hole. The connecting rod is connected to the moving part of the vibrating drive component 22 and the vibrating grading screen 21. The vibrating drive component 22 drives the vibrating grading screen 21 to vibrate through the connecting rod, thereby vibrating and screening the steel slag.

[0024] The steel slag grading bin 1 is equipped with a grading inlet, which is located above the grading mechanism 2. Steel slag is added into the steel slag grading bin 1 through the grading inlet and is graded and screened by the grading mechanism 2. To reduce the impact of steel slag on the vibrating grading screen 21 and prevent damage to the vibrating grading screen 21, the grading screen also includes a fixed grading screen 23. The fixed grading screen 23 is inclined and located below the grading inlet. After the steel slag enters the steel slag grading bin 1 through the grading inlet, it first falls onto the fixed grading screen 23. The fixed grading screen 23 bears the direct impact of the steel slag. While grading the steel slag, the fixed grading screen 23 also guides the steel slag to the vibrating grading screen 21 through its inclined screen surface.

[0025] In a preferred embodiment, the wall of the high-end steel slag grading bin 1 of the fixed grading screen 23 is connected. The second interlayer cavity inside the fixed grading screen 23 is directly connected to the first interlayer cavity. The lower end of the fixed grading screen 23 is positioned above the vibrating grading screen 21. A connecting pipe is provided on the vibrating grading screen 21. The second interlayer cavity of the vibrating grading screen 21 is connected to the first interlayer cavity or the second interlayer cavity of the fixed grading screen 23 through the connecting pipe. The connecting pipe is a deformable tube to adapt to the vibration of the vibrating grading screen 21. A conveying channel is provided outside the steel slag grading bin 1. When steel slag is added to the steel slag grading bin 1 from the grading inlet along the conveying channel, the steel slag first falls onto the fixed grading screen 23.

[0026] As one optional implementation, a double-roll crushing mechanism is provided at the grading inlet of the steel slag grading screen. Before entering the steel slag grading screen, the steel slag is first subjected to further crushing by the double-roll crushing mechanism and then falls onto the fixed grading screen 23. As another optional implementation, a single-roll crushing mechanism is provided above the fixed grading screen 23, and the single-roll crushing mechanism cooperates with the screen surface of the fixed grading screen 23. After the steel slag falls onto the fixed grading screen 23, most of the steel slag moves along the screen surface of the fixed grading screen 23 to the side where the vibrating grading screen 21 is located. The single-roll crushing mechanism cooperates with the fixed grading screen 23 to further crush the steel slag. The fixed grading screen 23 can be configured with an arc-shaped upper screen surface.

[0027] In some embodiments, the vibrating grading screen 21 and the fixed grading screen 23 are screen plates with internal interlayer spaces. In other embodiments, the vibrating grading screen 21 and the fixed grading screen 23 each include several component tubes, which are arranged side by side and connected to each other. The gap between adjacent component tubes serves as a screen hole, and the internal spaces of each component tube are interconnected to form a second interlayer cavity.

[0028] The grading outlets can also be configured with two or more, in which case the form of the grading screen will change accordingly, allowing the grading mechanism 2 to send the steel slag to each grading outlet according to the steel slag particle size. Taking three grading outlets as an example, the three grading outlets are the first grading outlet, the second grading outlet, and the third grading outlet. The grading screen includes a first screen plate, a second screen plate, and an inclined screen plate. The first screen plate is inclinedly set above the first and second grading outlets, and the lower end of the first screen plate is located at the third grading outlet. The second screen plate is inclinedly set above the first grading outlet, and the lower end of the second screen plate is located at the second grading outlet. An inclined baffle is inclinedly set between the first and second screen plates, with the upper end of the inclined baffle connected to the lower end of the first screen plate, and the lower end of the inclined baffle located near the upper end of the second screen plate. The steel slag entering the steel slag grading bin 1 first falls onto the first screen plate. The larger steel slag particles fall along the inclined first screen plate to the third grading outlet, while the smaller steel slag particles fall through the screen holes of the first screen plate onto the inclined baffle or the second screen plate. The steel slag on the inclined baffle then falls along the inclined baffle onto the second screen plate. Then, these steel slag particles are sorted by the second screen plate and distributed to the first grading outlet and the second grading outlet, respectively.

[0029] In this specification, the terms "an embodiment," "example," "specific example," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0030] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A steel slag classifying device, characterized by: The grading mechanism includes a steel slag grading bin (1) and a grading mechanism (2). The steel slag grading bin (1) is provided with at least two grading outlets. The bin wall of the steel slag grading bin (1) is provided with a first interlayer cavity. The steel slag grading bin (1) is provided with a water injection port and an exhaust port. The water injection port and the exhaust port are connected to the first interlayer cavity. The grading mechanism (2) is located inside the steel slag grading bin (1). The grading mechanism (2) delivers the steel slag to the designated grading outlet according to the particle size of the steel slag in the steel slag grading bin (1). The grading mechanism (2) includes a grading screen. The grading screen is provided with a second interlayer cavity. The second interlayer cavity is connected to the first interlayer cavity.

2. A steel slag classifying device according to claim 1, characterized in that: The steel slag grading bin (1) is equipped with two grading outlets, namely the first grading outlet (11) and the second grading outlet (12). The grading screen is set above the first grading outlet (11) and sends the small-diameter steel slag screened out to the first grading outlet (11). The grading screen is tilted towards the second grading outlet (12) and sends the large-diameter steel slag screened out to the second grading outlet (12).

3. A steel slag classifying device according to claim 2, characterized in that: The grading screen includes a vibrating grading screen (21), and a vibrating mounting device is provided above the first grading outlet (11). The vibrating grading screen (21) is installed at an angle above the first grading outlet (11) by the vibrating mounting device, and is driven to vibrate by a vibrating drive device (22) provided outside the steel slag grading bin (1).

4. A steel slag classifying device according to claim 3, characterized in that: The steel slag grading bin (1) is equipped with a grading inlet, and the grading screen also includes a fixed grading screen (23). The fixed grading screen (23) is inclined and set below the grading inlet. The fixed grading screen (23) screens the steel slag and guides the steel slag to the vibrating grading screen (21).

5. A steel slag classifying device according to claim 4, characterized in that: The fixed grading screen (23) is connected to the wall of the steel slag grading bin (1), and the lower end of the fixed grading screen (23) is above the vibrating grading screen (21).

6. A steel slag classifying device according to claim 4, characterized in that: A double-roll crushing mechanism is installed at the grading inlet.

7. A steel slag classifying device according to claim 4, characterized in that: A single-roll crushing mechanism is installed above the fixed grading screen (23), and the single-roll crushing mechanism works with the fixed grading screen (23) to crush steel slag.

8. A steel slag classifying device according to claim 7, characterized in that: The upper sieve surface of the fixed grading sieve (23) is an arc-shaped surface.

9. A steel slag classifying device according to claim 4, characterized in that: The fixed grading screen (23) and / or the vibrating grading screen (21) include several component tubes, which are arranged side by side and connected to each other. The interiors of each component tube are interconnected to form a second interlayer cavity, and the gaps between adjacent component tubes form screen holes.

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