Rapid cooling and crushing system for hot-state steel slag of converter

Abstract

The utility model discloses a converter hot-state steel slag rapid cooling and crushing system which comprises a tank body and a feed port arranged on one side of the top of the tank body, a material guide plate is obliquely arranged in the tank body below the feed port, a flow limiting plate is arranged on the top of the tank body above the material guide plate, and a transverse pipe is arranged below the lower end of the material guide plate. A supporting plate is obliquely arranged in the side, opposite to the exhaust port, of the tank body, an impact plate is connected to the supporting plate through an elastic piece, a material gathering cone is arranged below the impact plate, a plurality of annular pipes which are communicated with one another are concentrically arranged at the upper end of the material gathering cone, and the transverse pipe and the annular pipes are all communicated with a cold air pipe; the lower end of the material gathering cone is connected with a transverse cylinder, a rotating shaft is arranged in the transverse cylinder, a beating hammer is arranged on the rotating shaft, a material leaking hole is machined in the lower half portion of the transverse cylinder, and a discharging opening is formed in the bottom of the tank body. In conclusion, the crusher has the advantages of high treatment efficiency, high cooling speed and good crushing effect.

Description

Technical Field

[0001] This utility model relates to the field of converter steel slag treatment technology, specifically to a rapid cooling and crushing system for hot converter steel slag. Background Technology

[0002] There are many methods for treating hot steel slag from converters, including hot pouring, water quenching, drum quenching, shallow trough quenching, hot simmering, and pressurized waste heat treatment. However, each method has its own problems: hot pouring can treat various types of steel slag, but it cannot meet environmental protection requirements; water quenching cannot treat viscous slag and lumpy slag; drum quenching involves complex equipment and a large system; shallow trough quenching has many process steps and occupies a large area; and pressurized waste heat treatment has problems such as large equipment footprint, many operation steps, and difficulty in treating low-temperature slag.

[0003] In general, the above methods all suffer from complex processes and equipment, requiring significant equipment investment, lengthy slag processing times, and lower efficiency. Secondly, most suffer from slow cooling rates and poor cooling effects on hot steel slag, leaving the temperature of the crushed slag still relatively high, which is detrimental to subsequent processing and recycling, thus affecting the overall processing performance. Furthermore, the crushing effect is often inadequate, failing to meet the required standards. Therefore, developing a rapid cooling and crushing system for converter hot steel slag with high processing efficiency, fast cooling rate, and good crushing effect is objectively necessary. Utility Model Content

[0004] The purpose of this invention is to provide a rapid cooling and crushing system for hot converter steel slag that has high processing efficiency, fast cooling speed, and good crushing effect.

[0005] The purpose of this utility model is achieved as follows: It includes a tank body and a feed inlet located on one side of the top of the tank body. A guide plate is inclinedly arranged inside the tank body below the feed inlet. An exhaust port is located on the tank body above the higher end of the guide plate. A flow-limiting plate is located on the top of the tank body above the guide plate, and ventilation holes are machined on the flow-limiting plate. A material passage gap is left between the lower end of the flow-limiting plate and the guide plate. A horizontal pipe is located below the lower end of the guide plate, and rows of slag-blowing pipes are arranged inclined upwards on the horizontal pipe. A support plate is inclinedly arranged inside the tank body on the side opposite to the exhaust port. An impact plate is connected to the support plate via an elastic element. A material-gathering cone is located below the impact plate. Several interconnected annular pipes are concentrically arranged at the upper end of the material-gathering cone. An air jet pipe is machined at the top of each annular pipe. Both the horizontal pipe and the annular pipes are connected to a cold air pipe. A horizontal cylinder is connected to the lower end of the material-gathering cone. A rotating shaft is located inside the horizontal cylinder, and a striking hammer is installed on the rotating shaft. A material leakage hole is machined in the lower half of the horizontal cylinder. A discharge port is located at the bottom of the tank body.

[0006] Furthermore, a baffle plate is installed on the top of the tank between the flow restrictor and the impact plate.

[0007] Furthermore, a rotating roller is installed above the guide plate, and a stirring rod is installed on the rotating roller.

[0008] Furthermore, there are no fewer than two horizontal pipes, and the slag blowing pipes on adjacent horizontal pipes are arranged alternately.

[0009] Furthermore, an auger mechanism is installed at the bottom of the tank, and the discharge end of the auger mechanism is connected to the discharge port.

[0010] Furthermore, several protrusions are provided on the lower surface of the impact plate.

[0011] Furthermore, the slag blowing pipe is tapered, with the small end of the tapered pipe facing the direction of the impact plate.

[0012] In operation, the hot slag from the converter enters the tank through the feed inlet and falls onto the guide plate, flowing downwards along it. A flow-limiting plate restricts the height of the slag layer, ensuring even distribution. Cool air is introduced into the cooling pipe, divided into two parts: one part enters the horizontal pipe and then exits through the slag blowing pipe. The slag falling from the lower end of the guide plate is agitated by the high-speed cold air. The airflow cools the slag and simultaneously disperses it, propelling it towards the impact plate. Upon impact, the slag initially breaks and rebounds, falling back under its own weight. Simultaneously, another... A portion of the cold air is introduced into the ring pipe and then sprayed upwards from the jet pipe, making counter-current contact with the falling steel slag. This slows down the steel slag, increasing the contact time between the slag and the cold air, and further cools the slag to a suitable temperature. The two portions of cold air rise and flow laterally, pre-cooling the steel slag on the guide plate during the flow. Finally, the slag is discharged from the exhaust port, while the cooled steel slag falls into the horizontal cylinder. The rotating shaft drives the hammer to rotate, striking the steel slag during the rotation, further crushing it. Steel slag of suitable particle size falls from the discharge hole to the bottom of the tank, thus obtaining steel slag with the required volume and temperature. In this invention, the cooling and crushing of hot converter slag are integrated into a single tank for continuous processing, eliminating the need for additional equipment. This simplifies the process and equipment, shortens slag processing time, and improves processing efficiency. Secondly, the invention incorporates a slag-blowing pipe for initial cooling of the slag. After the slag is initially crushed upon impact with the impact plate and falls, a jet of cold air further cools it during its descent. The slag remains surrounded by flowing cold air throughout its flight, resulting in rapid and effective cooling. Simultaneously, the cold air flows laterally before exiting the exhaust port, further cooling the slag on the guide plate and enhancing cooling efficiency. Finally, propelled by the cold air, the slag flies towards the impact plate, undergoing initial crushing upon collision. It then enters the horizontal cylinder for further crushing, ultimately yielding slag of the required volume. In summary, this invention offers advantages such as high processing efficiency, rapid cooling, and excellent crushing effect. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0014] In the diagram: 1-Tank body, 2-Inlet, 3-Guide plate, 4-Exhaust port, 5-Flow limiting plate, 6-Horizontal pipe, 7-Slag blowing pipe, 8-Elastic component, 9-Impact plate, 10-Gathering cone, 11-Ring pipe, 12-Cold air pipe, 13-Horizontal cylinder, 14-Rotating shaft, 15-Impact hammer, 16-Baffle plate, 17-Rotating roller, 18-Slag stirring rod, 19-Auger mechanism, 20-Protrusion. Detailed Implementation

[0015] The present invention will be further described below with reference to the accompanying drawings, but this description is not intended to limit the present invention in any way. Any changes or improvements made based on the present invention shall fall within the protection scope of the present invention.

[0016] like Figure 1 As shown, this utility model includes a tank body 1 and a feed inlet 2 located on one side of the top of the tank body 1. A guide plate 3 is inclinedly arranged inside the tank body 1 below the feed inlet 2. An exhaust port 4 is located on the tank body 1 above the higher end of the guide plate 3. A flow restrictor plate 5 is located on the top of the tank body 1 above the guide plate 3, and vent holes are machined on the flow restrictor plate 5. A material passage gap is left between the lower end of the flow restrictor plate 5 and the guide plate 3. A horizontal pipe 6 is located below the lower end of the guide plate 3, and rows of slag blowing pipes 7 are arranged inclined upwards on the horizontal pipe 6. On the side of the tank body 1 opposite to the exhaust port 4... An inwardly inclined support plate is provided, and an impact plate 9 is connected to the support plate via an elastic element 8. Below the impact plate 9, a material-gathering cone 10 is provided. Several interconnected annular pipes 11 are concentrically arranged at the upper end of the material-gathering cone 10. Each annular pipe 11 has a jet pipe machined at its top. The horizontal pipe 6 and the annular pipes 11 are all connected to a cooling air pipe 12. The lower end of the material-gathering cone 10 is connected to a horizontal cylinder 13, inside which a rotating shaft 14 is provided. A striking hammer 15 is mounted on the rotating shaft 14. A material leakage hole is machined in the lower half of the horizontal cylinder 13, and a discharge port is provided at the bottom of the tank body 1. In actual installation, a drive mechanism can be installed on the tank body 1 to drive the rotating shaft 14 and the striking hammer 15 to rotate.

[0017] In operation, the hot slag from the converter enters the tank 1 through the feed inlet 2 and falls onto the guide plate 3, flowing downwards along it. The flow-limiting plate 5 restricts the height of the slag layer and ensures its uniform distribution on the guide plate 3. Cool air at a lower temperature is introduced into the cooling air pipe 12. This air is divided into two parts: one part enters the horizontal pipe 6 and then exits from the slag blowing pipe 7. The slag falling from the lower end of the guide plate 3 is agitated by the high-speed cold air. The airflow cools the slag and disperses it, carrying it towards the impact plate 9. Upon impact with the impact plate 9, the slag is initially broken and rebounds, falling back under its own weight. Another portion of the cold air is introduced into the ring pipe 11 and then sprayed upward from the jet pipe, making counter-current contact with the falling steel slag. On the one hand, it slows down the steel slag and increases the contact time between the steel slag and the cold air, and on the other hand, it cools the steel slag again, so that the steel slag is cooled to an appropriate temperature. After the two portions of cold air rise, they flow horizontally. During the flow, the steel slag on the guide plate 3 is pre-cooled and finally discharged from the exhaust port 4. The cooled steel slag falls into the horizontal cylinder 13. The rotating shaft 14 drives the hammer 15 to rotate and strike the steel slag during the rotation, further crushing the steel slag. Steel slag of suitable particle size falls from the leakage hole to the bottom of the tank 1, thus obtaining steel slag with the required volume and temperature. In this invention, the cooling and crushing of hot converter slag are integrated and carried out continuously within a single tank 1, eliminating the need for additional equipment. This simplifies the process and equipment, shortens slag processing time, and improves processing efficiency. Secondly, a slag-blowing pipe 7 is installed to provide the first cooling of the slag. After the slag is initially crushed upon impact with the impact plate 9 and falls, cold air is sprayed from the jet pipe to provide a second cooling during its descent. The slag is surrounded by flowing cold air throughout its flight, resulting in rapid and effective cooling. Simultaneously, the cold air flows laterally before exiting through the exhaust port 4, providing initial cooling to the slag on the guide plate 3 and further enhancing cooling efficiency. Finally, the slag, propelled by the cold air, flies towards the impact plate 9, colliding with it for the first crushing. It then enters the horizontal cylinder 13 for further crushing, ultimately yielding slag of the required volume.

[0018] A baffle plate 16 is provided on the top of the tank 1 between the flow limiting plate 5 and the impact plate 9. In this utility model, cold air is used to blow the steel slag and cause the steel slag to collide with the impact plate 9. After the steel slag is broken, it will splash in all directions. Some of the steel slag will fly above the guide plate 3 and may land on the guide plate 3 or block the vent on the flow limiting plate 5, thereby affecting the normal operation of the steel slag cooling and crushing. The baffle plate 16 can block the steel slag and prevent it from flying above the guide plate 3.

[0019] A rotating roller 17 is installed above the guide plate 3, and a stirring rod 18 is installed on the rotating roller 17. In actual use, it was found that hot steel slag first falls onto the guide plate 3 and then falls from the lower end of the guide plate 3. When the hot steel slag is conveyed on the guide plate 3, it is cooled by the cold air, and the upper layer of steel slag will cool and solidify, thus affecting the conveying of subsequent steel slag. After setting the rotating roller 17 and the stirring rod 18, the rotating roller 17 drives the stirring rod 18 to rotate. When the stirring rod 18 rotates, it can break up the cooled and solidified upper layer of steel slag, ensuring the smooth conveying of steel slag on the guide plate 3. On the other hand, it can also stir the steel slag, so that more steel slag can come into contact with the cold air above for heat exchange, thereby improving the cooling and crushing effect of the steel slag.

[0020] There are no fewer than two horizontal pipes 6. The slag blowing pipes 7 on the two adjacent horizontal pipes 6 are arranged in an alternating manner. In actual use, it has been found that due to the unavoidable gap between the two adjacent slag blowing pipes 7, the blown cold air cannot cover the entire plane. As a result, a small amount of steel slag falls directly without being blown out by the cold air, and thus cannot be cooled and crushed effectively. To solve this problem, multiple horizontal pipes 6 can be set up, and the slag blowing pipes 7 on the multiple horizontal pipes 6 can be arranged in an alternating manner. This can ensure that the cold air can cover the entire plane, thereby blowing away all the steel slag and improving the cooling and crushing effect of the steel slag.

[0021] A screw conveyor mechanism 19 is installed at the bottom of the tank body 1, and the discharge end of the screw conveyor mechanism 19 is connected to the discharge port. The screw conveyor mechanism 19 is existing technology and is used for material conveying. In this utility model, the crushed steel slag falls from the leakage hole on the horizontal cylinder 13 to the bottom of the tank body 1. At this time, the screw conveyor mechanism 19 is activated, and the steel slag can be automatically discharged, reducing the labor intensity of workers, improving the discharge efficiency of steel slag, and eliminating the safety hazards caused by workers cleaning slag.

[0022] Several protrusions 20 are provided on the lower surface of the impact plate 9. The cold air in the horizontal pipe 6 is sprayed out from the slag blowing pipe 7 to disperse the hot steel slag and blow it toward the impact plate 9, so that the steel slag collides and breaks with the impact plate 9. After the protrusions 20 are provided, the steel slag will hit the protrusions 20. Since the contact area between the steel slag and the protrusions 20 is small, the force at the point of impact can be increased, making it easier for the steel slag to break.

[0023] The slag blowing pipe 7 is conical, with the small end of the cone facing the impact plate 9. Cold air from the horizontal pipe 6 is ejected from the slag blowing pipe 7 to disperse the hot steel slag and direct it toward the impact plate 9. By setting the slag blowing pipe 7 in a conical shape, the cold airflow increases due to the reduced effective flow area, ensuring that the steel slag is blown away. This increases the impact force between the steel slag and the impact plate 9, improving the crushing efficiency of the steel slag. Overall, this enhances the cooling and crushing effects of the steel slag.

[0024] In this invention, steel slag is crushed inside the horizontal cylinder 13, but some stubborn slag pieces often cannot be crushed, which affects the overall crushing efficiency and effect of the steel slag. Therefore, the horizontal cylinder 13 can be set at an angle, and a slag discharge door can be set on the tank body 1 at the lower end of the horizontal cylinder 13. When necessary, the slag discharge door can be opened to discharge the stubborn steel slag from the slag discharge door, ensuring the crushing efficiency of the steel slag.

Claims

1. A rapid cooling and crushing system for hot steel slag from a converter, comprising a tank (1) and a feed inlet (2) disposed on one side of the top of the tank (1), characterized in that... A guide plate (3) is inclinedly arranged inside the tank (1) below the feed inlet (2). An exhaust port (4) is arranged on the tank (1) above the higher end of the guide plate (3). A flow restrictor (5) is arranged on the top of the tank (1) above the guide plate (3). A vent hole is machined on the flow restrictor (5). A material passage gap is left between the lower end of the flow restrictor (5) and the guide plate (3). A horizontal pipe (6) is arranged below the lower end of the guide plate (3). A row of slag blowing pipes (7) are arranged inclined upward on the horizontal pipe (6). A support plate is inclinedly arranged inside the tank (1) on the side opposite to the exhaust port (4). An impact plate (9) is connected to the elastic element (8). A material-gathering cone (10) is provided below the impact plate (9). Several interconnected ring pipes (11) are concentrically arranged at the upper end of the material-gathering cone (10). A jet pipe is machined at the top of each ring pipe (11). The horizontal pipe (6) and the ring pipe (11) are connected to the cold air pipe (12). A horizontal cylinder (13) is connected to the lower end of the material-gathering cone (10). A rotating shaft (14) is provided inside the horizontal cylinder (13). A hammer (15) is provided on the rotating shaft (14). A material leakage hole is machined in the lower half of the horizontal cylinder (13). A discharge port is provided at the bottom of the tank body (1).

2. The rapid cooling and crushing system for hot steel slag in a converter according to claim 1, characterized in that... A baffle plate (16) is provided on the top of the tank (1) between the flow limiting plate (5) and the impact plate (9).

3. The rapid cooling and crushing system for hot steel slag in a converter according to claim 1, characterized in that... A rotating roller (17) is provided above the guide plate (3), and a stirring rod (18) is provided on the rotating roller (17).

4. The rapid cooling and crushing system for hot steel slag in a converter according to claim 1, characterized in that... The number of the horizontal pipes (6) shall not be less than two, and the slag blowing pipes (7) on the two adjacent horizontal pipes (6) shall be arranged alternately.

5. A rapid cooling and crushing system for hot steel slag from a converter according to claim 1, characterized in that... The bottom of the tank (1) is provided with an auger mechanism (19), and the discharge end of the auger mechanism (19) is connected to the discharge port.

6. The rapid cooling and crushing system for hot steel slag in a converter according to claim 1, characterized in that... The lower surface of the impact plate (9) is provided with several protrusions (20).

7. A rapid cooling and crushing system for hot steel slag from a converter according to claim 1, characterized in that... The slag blowing pipe (7) is conical, with the small end of the cone facing the impact plate (9).

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