Secondary cooling and unloading device for reducing slag

Abstract

This invention relates to a secondary cooling and unloading device for reducing slag, belonging to the technical field of unloading devices. It includes a primary cooling silo, a secondary cooling silo, and an unloading silo connected sequentially from top to bottom. Inside the primary and secondary cooling silos, horizontally arranged cooling pipes are inserted side-by-side in rows from top to bottom. Each row contains several cooling pipes arranged horizontally, and cooling fins are fixed to the opposite peripheral wall of each cooling pipe. Several cooling pipes in the same row are synchronously driven to rotate via an adjustment structure. Under normal conditions, the cooling fins are horizontally arranged; during unloading, the cooling fins are vertically arranged. This invention overcomes the problem in traditional technologies where, during heat exchange and cooling of the reducing slag after magnesium smelting, the structural limitations of the heat exchange structure prevent the increase of contact time and area between the reducing slag and the heat exchange structure, thus reducing the cooling efficiency of the reducing slag.

Description

Technical Field

[0001] This utility model relates to the technical field of unloading devices, specifically to a two-stage cooling unloading device for reducing slag. Background Technology

[0002] The production process of metallic magnesium requires a high temperature of 1200℃. Currently, the reducing slag containing a large amount of heat generated in the production process of metallic magnesium needs to be cooled and discharged.

[0003] A patent with publication number CN104457287A is disclosed in the prior art. The solution consists of an outer cylinder, an inner cylinder, a slag inlet device, a slag outlet device, a power transmission device, a base frame, a water inlet / outlet device, an air-cooling device, and an electrical control system. The inner cylinder is characterized by being made of graphite rods and adopting a wall-type structure with both water and air cooling. The main advantages are that the inner cylinder is made of graphite rods, which has high thermal conductivity; the water and air cooling systems exchange heat with the scattered slag material simultaneously, resulting in good slag cooling effect; low water consumption; and no special requirements for water quality.

[0004] The shortcomings of existing technology have gradually become apparent with use, mainly in the following aspects:

[0005] First, when the reduced slag after magnesium smelting exchanges heat with the cooling device, the contact time and area between the reduced slag and the cooling device are limited by the structure of the heat exchange structure, thus reducing the cooling efficiency of the reduced slag.

[0006] Secondly, because the reducing slag is at a high temperature, existing cooling devices require a long time to cool it, making it impossible to achieve gradual cooling and increasing the workload of the cooling devices.

[0007] In conclusion, the existing technology obviously has inconveniences and defects in practical use, so it is necessary to improve it. Utility Model Content

[0008] To address the shortcomings of existing technologies, this utility model provides a two-stage cooling and unloading device for reducing slag. This device solves the problem that in traditional technologies, when reducing slag after magnesium smelting exchanges heat with a cooling device, the structural limitations of the heat exchange structure prevent the increase of the contact time and area between the reducing slag and the heat exchange structure, thus reducing the cooling efficiency of the reducing slag.

[0009] To achieve the above objectives, this utility model provides the following technical solution:

[0010] The reducing slag two-stage cooling and unloading device includes a primary cooling silo, a secondary cooling silo, and an unloading silo connected sequentially from top to bottom. The primary and secondary cooling silos are equipped with horizontally arranged cooling pipes arranged in parallel from top to bottom. Each row of cooling pipes has several pipes arranged in parallel along the horizontal direction. Cooling fins are fixed to the opposite peripheral wall of each cooling pipe. The cooling pipes in the same row are synchronously driven to rotate through an adjustment structure. Under normal conditions, the cooling fins are arranged horizontally. Under unloading conditions, the cooling fins are arranged vertically.

[0011] As an optimized solution, a top gate valve is connected between the primary cooling silo and the secondary cooling silo.

[0012] As an optimized solution, a bottom gate valve is connected between the secondary cooling silo and the unloading silo.

[0013] As an optimized solution, a discharge valve is connected to the lower end of the discharge bin.

[0014] As an optimized solution, the two cooling fins on the cooling pipe are in the same diameter direction.

[0015] As an optimized solution, the primary and secondary cooling silos are further equipped with parallel inlet and outlet pipes for each row of cooling pipes. The inlet and outlet pipes are located on both sides of each row of cooling pipes, and the inlet, cooling pipes and outlet pipes are connected in sequence through connecting elbows.

[0016] As an optimized solution, both ends of the cooling pipe extend to the outside of the primary or secondary cooling silo and are rotatably inserted into the connection elbow port.

[0017] As an optimized solution, the adjustment structure includes a drive rod that is horizontally reciprocating and sliding. A rack is fixedly connected to the upper surface of the drive rod. A plurality of cooling pipes in the same row are fixedly connected to a gear facing the same outer side wall. The gear meshes with the rack.

[0018] As an optimized solution, two guide seats are fixedly connected in parallel on the outer walls of the primary cooling silo and the secondary cooling silo for each drive rod. The guide seats are provided with guide holes that match the drive rods, and the drive rods are slidably installed in the guide holes.

[0019] As an optimized solution, a telescopic cylinder is horizontally fixed to the outer wall of the primary cooling silo and the secondary cooling silo for each of the drive rods, and the telescopic end of the telescopic cylinder is fixed to one end of the drive rod.

[0020] As an optimized solution, a sealing ring is provided between the outer wall of the cooling pipe and the inner wall of the connecting elbow.

[0021] As an optimized solution, a connecting cylinder is fixedly connected to the other end of the inlet pipe and the outlet pipe.

[0022] Compared with the prior art, the beneficial effects of this utility model are:

[0023] By setting up a primary cooling silo, a secondary cooling silo, and a discharge silo from top to bottom, the reducing slag is cooled in a step-by-step manner through two cooling silos. This not only has high efficiency but also shortens the cooling time. After the secondary cooling, the reducing slag falls into the discharge silo. A gate valve is installed between the two silos to allow for the opening and closing of adjacent silos and prevent interference with other silos.

[0024] The primary and secondary cooling silos are equipped with horizontally arranged cooling pipes arranged in parallel from top to bottom. Under normal conditions, several cooling fins are horizontally arranged to support the reducing slag, reduce the falling speed of the reducing slag, and increase the cooling time and cooling area with the cooling pipes. After cooling for a period of time, the cylinder drives the drive rod to move. The drive rod uses a rack and pinion to drive the gear and cooling pipe to rotate, so that the cooling fins are driven downward to the unloading state. The reducing slag can continue to fall downward to the next silo, which greatly improves the cooling efficiency of the reducing slag. Attached Figure Description

[0025] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0026] Figure 1 This is a schematic diagram of the structure of this utility model;

[0027] Figure 2 This is a schematic diagram of the structure of the cooling fins of this utility model.

[0028] In the diagram: 1- Primary cooling silo, 2- Secondary cooling silo, 3- Unloading silo, 4- Top slide gate valve, 5- Bottom slide gate valve; 6- Inlet pipe; 7- Outlet pipe; 8- Connecting elbow; 9- Drive rod; 10- Guide seat; 11- Telescopic cylinder; 12- Cooling fins; 13- Rack; 14- Gear; 15- Connecting cylinder. Detailed Implementation

[0029] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the present invention and should not be construed as limiting the scope of protection of the present invention.

[0030] like Figure 1 and Figure 2 As shown, the secondary cooling and unloading device for reducing slag includes a primary cooling silo 1, a secondary cooling silo 2, and an unloading silo 3 connected sequentially from top to bottom. Inside the primary cooling silo 1 and the secondary cooling silo 2, horizontally arranged cooling pipes are inserted side by side from top to bottom. Each row of cooling pipes has several pipes arranged in the horizontal direction. Cooling fins 12 are fixed to the opposite peripheral wall of each cooling pipe. Several cooling pipes in the same row are synchronously driven to rotate through an adjustment structure. Under normal conditions, several cooling fins 12 are arranged horizontally. Under unloading conditions, the cooling fins 12 are arranged vertically.

[0031] A top gate valve 4 connects the primary cooling silo 1 and the secondary cooling silo 2.

[0032] A bottom gate valve 5 connects the secondary cooling silo 2 and the unloading silo 3.

[0033] The lower end of the unloading hopper 3 is connected to an unloading valve.

[0034] The two cooling fins 12 on the cooling pipe are in the same diameter direction.

[0035] Inside the primary cooling silo 1 and the secondary cooling silo 2, each row of cooling pipes is also connected to an inlet pipe 6 and an outlet pipe 7 in parallel. The inlet pipe 6 and the outlet pipe 7 are located on both sides of each row of cooling pipes. The inlet pipe 6, the cooling pipes and the outlet pipe 7 are connected in sequence through connecting elbows 8. The connecting elbows 8 can be fixed to the outer wall of the cooling silo through connectors.

[0036] The two ends of the cooling pipe extend to the outside of the primary cooling silo 1 or the secondary cooling silo 2, and are rotatably inserted into the port of the connecting elbow 8.

[0037] The adjustment structure includes a drive rod 9 that is horizontally reciprocating and sliding. A rack 13 is fixedly connected to the upper surface of the drive rod 9. A number of cooling pipes on the same row are fixedly connected to a gear 14 facing the same outer side wall. The gear 14 meshes with the rack 13.

[0038] On the outer walls of the primary cooling silo 1 and the secondary cooling silo 2, two guide seats 10 are fixedly connected in parallel to each drive rod 9. The guide seats 10 are provided with guide holes that match the drive rod 9, and the drive rod 9 is slidably installed in the guide holes.

[0039] On the outer walls of the primary cooling silo 1 and the secondary cooling silo 2, a telescopic cylinder 11 is horizontally fixed to each drive rod 9. The telescopic end of the telescopic cylinder 11 is fixed to one end of the drive rod 9.

[0040] Each row of cooling pipes is independently controlled to rotate by telescopic cylinder 11, so that when the reducing slag enters the silo, it changes from vertical to horizontal from the bottom cooling fins 12 upwards, thereby increasing the contact area between the reducing slag and the cooling pipes inside the cooling silo.

[0041] A sealing ring is provided between the outer wall of the cooling pipe and the inner wall of the connecting elbow 8.

[0042] A connecting cylinder 15 is fixedly connected to the other end of the liquid inlet pipe 6 and the liquid outlet pipe 7 to connect the cooling medium.

[0043] The working principle of this device is as follows:

[0044] By setting up a primary cooling bin 1, a secondary cooling bin 2, and a discharge bin 3 from top to bottom, the reducing slag is cooled step by step through two cooling bins. This not only has high efficiency but also shortens the cooling time. After the secondary cooling, the reducing slag falls into the discharge bin 3. A gate valve is installed between the two bins to allow the adjacent bins to be connected or disconnected, preventing interference with other bins.

[0045] The primary cooling silo 1 and the secondary cooling silo 2 are equipped with horizontally arranged cooling pipes inserted side by side from top to bottom. Under normal conditions, several cooling fins 12 are horizontally arranged to support the reducing slag, reduce the falling speed of the reducing slag, and increase the cooling time and cooling area with the cooling pipes. After cooling for a period of time, the cylinder drives the drive rod 9 to move. The drive rod 9 uses the rack 13 to drive the gear 14 and the cooling pipe to rotate, so that the cooling fins 12 are driven downward to the unloading state. The reducing slag can continue to fall downward to the next silo, which greatly improves the cooling efficiency of the reducing slag.

[0046] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model, and they should all be covered within the scope of the claims and specification of this utility model.

Claims

1. A two-stage cooling and unloading device for reducing slag, characterized in that: It includes a primary cooling silo (1), a secondary cooling silo (2), and a discharge silo (3) connected from top to bottom; the primary cooling silo (1) and the secondary cooling silo (2) are equipped with horizontally arranged cooling pipes arranged in parallel from top to bottom. Each row of cooling pipes has several cooling pipes arranged in parallel along the horizontal direction. Cooling fins (12) are fixed to the opposite peripheral wall of each cooling pipe. Several cooling pipes in the same row are synchronously driven to rotate through an adjustment structure. Under normal conditions, several cooling fins (12) are arranged horizontally. Under the discharge state, the cooling fins (12) are arranged vertically.

2. The secondary cooling and unloading device for reducing slag according to claim 1, characterized in that: A top gate valve (4) is connected between the primary cooling silo (1) and the secondary cooling silo (2).

3. The secondary cooling and unloading device for reducing slag according to claim 2, characterized in that: A bottom gate valve (5) is connected between the secondary cooling silo (2) and the unloading silo (3).

4. The secondary cooling and unloading device for reducing slag according to claim 3, characterized in that: The lower end of the unloading bin (3) is connected to an unloading valve.

5. The secondary cooling and unloading device for reducing slag according to claim 4, characterized in that: The two cooling fins (12) on the cooling pipe are in the same diameter direction.

6. The secondary cooling and unloading device for reducing slag according to claim 5, characterized in that: The primary cooling silo (1) and the secondary cooling silo (2) are each connected in parallel with an inlet pipe (6) and an outlet pipe (7) for each row of cooling pipes. The inlet pipe (6) and the outlet pipe (7) are located on both sides of the cooling pipe in each row. The inlet pipe (6), the cooling pipe and the outlet pipe (7) are connected in sequence through a connecting elbow (8).

7. The secondary cooling and unloading device for reducing slag according to claim 6, characterized in that: The two ends of the cooling pipe extend to the outside of the primary cooling silo (1) or the secondary cooling silo (2) and are rotatably inserted into the port of the connecting elbow (8).

8. The secondary cooling and unloading device for reducing slag according to claim 7, characterized in that: The adjustment structure includes a drive rod (9) that is horizontally reciprocating and sliding. A rack (13) is fixed to the upper surface of the drive rod (9). A gear (14) is fixed to a plurality of cooling pipes on the same row facing the same outer side wall. The gear (14) meshes with the rack (13).

9. The secondary cooling and unloading device for reducing slag according to claim 8, characterized in that: On the outer walls of the primary cooling silo (1) and the secondary cooling silo (2), two guide seats (10) are fixedly connected in parallel to each of the drive rods (9). The guide seats (10) are provided with guide holes that match the drive rods (9), and the drive rods (9) are slidably installed in the guide holes.

10. The secondary cooling and unloading device for reducing slag according to claim 9, characterized in that: On the outer walls of the primary cooling silo (1) and the secondary cooling silo (2), a telescopic cylinder (11) is horizontally fixed to each of the drive rods (9), and the telescopic end of the telescopic cylinder (11) is fixed to one end of the drive rod (9).

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