Slag flushing groove structure for blast furnace

Abstract

The utility model discloses a slag flushing groove structure for a blast furnace, relates to the technical field of blast furnace equipment, and solves the technical problems that the slag flushing groove for the blast furnace in the prior art is generally of a simple U-shaped structure and is poorer in heat dissipation capability, so that slag with higher temperature is easy to damage the slag flushing groove and is broken, and the service life is influenced. Comprising a slag flushing tank body, a cold water inlet pipe is jointly and fixedly connected to a plurality of multi-point water injection pipelines, a plurality of external heat dissipation fins are evenly and fixedly installed on the outer side of the slag flushing tank body, and a plurality of heat absorption plates communicated with a cold water heat absorption cavity are jointly installed on the upper surfaces of the external heat dissipation fins. Cold water is injected into the cold water heat absorption cavity through the cold water inlet pipe and the multi-point water injection pipeline, due to the fact that the multi-point water injection mode is adopted, the injection and circulation speed of the cold water can be increased, the heat absorption capacity can be enhanced through the external heat dissipation fins and the heat absorption plate, and the heat dissipation effect is improved.

Description

Technical Field

[0001] This utility model relates to the field of blast furnace equipment technology, and in particular to a slag flushing trough structure for blast furnaces. Background Technology

[0002] During blast furnace production, iron ore, coke, and flux (limestone) for slag formation are charged from the top. Preheated air is blown in through tuyeres located at the bottom of the furnace along its perimeter. At high temperatures, the carbon in the coke (and sometimes auxiliary fuels such as pulverized coal, heavy oil, or natural gas) burns with the oxygen in the blown air to produce carbon monoxide and hydrogen. As these gases rise within the furnace, they remove oxygen from the iron ore, thus reducing it to iron. The molten iron is then discharged from the taphole. Unreduced impurities in the iron ore combine with the flux, such as limestone, to form slag, which is discharged from the slag outlet. The generated gas is discharged from the top of the furnace, and after dust removal, it is used as fuel for hot blast stoves, heating furnaces, coke ovens, boilers, etc. The main product of blast furnace smelting is pig iron, with blast furnace slag and blast furnace gas as byproducts. Currently, the main process for treating blast furnace slag is water quenching. This involves the 1400℃-1500℃ high-temperature slag in the blast furnace flowing out of the slag outlet and then entering the slag flushing chute through the slag channel. A certain amount of water, water pressure, and chute slope are used to make the water and molten slag flow at a certain angle, impacting and quenching them into water slag.

[0003] Currently, existing slag flushing channels for blast furnaces are typically simple U-shaped structures with poor heat dissipation. This makes them susceptible to damage from the high-temperature molten slag, leading to cracking and reduced service life. Therefore, it is necessary to provide a slag flushing channel structure for blast furnaces to address these technical problems. Utility Model Content

[0004] The purpose of this invention is to provide a slag flushing trough structure for blast furnaces, in order to solve the problem that the existing slag flushing troughs have poor heat dissipation capacity, which makes them prone to damage and breakage caused by high-temperature molten slag, thus affecting their service life.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A slag flushing trough structure for a blast furnace includes a slag flushing trough body. Multiple multi-point water injection pipes are evenly arranged across the top of the slag flushing trough body. A cold water inlet pipe is connected to the middle of the multi-point water injection pipes. A cold water heat absorption cavity is opened through the inner side of the outer wall of the slag flushing trough body. Multiple external heat dissipation fins are evenly distributed on the outer side of the slag flushing trough body. Multiple heat absorption plates are evenly distributed on the contact surface between the external heat dissipation fins and the bottom side of the slag flushing trough body, and the heat absorption plates all extend into the inner side of the cold water heat absorption cavity.

[0007] Furthermore, the top of the slag flushing tank body is evenly provided with multiple installation through holes, and the multi-point water injection pipe is connected to the cold water heat absorption cavity through the installation through holes.

[0008] Furthermore, a support frame is evenly arranged inside the cold water heat absorption cavity.

[0009] Furthermore, a fixing groove is provided on one side of the outer wall of the slag flushing tank body, and a threaded groove is provided inside the fixing groove. A fixing block matching the fixing groove is fixed on the other side of the slag flushing tank body, and the fixing groove and the fixing block are detachably connected by fastening bolts.

[0010] Furthermore, a docking groove is provided on one side of the bottom of the outer wall of the slag flushing trough body, and a docking plate that matches and is fitted onto the docking groove is fixed on the other side of the slag flushing trough body.

[0011] The beneficial effects of this utility model are:

[0012] This invention provides a slag flushing trough structure for blast furnaces. Cold water is injected into the cold water heat absorption cavity through a cold water inlet pipe and multi-point water injection pipes. The multi-point water injection method increases the injection and flow rate of cold water. Furthermore, the use of external heat dissipation fins and heat absorption plates enhances heat absorption and improves heat dissipation. This solves the technical problem that existing blast furnace slag flushing troughs typically have a simple U-shaped structure with poor heat dissipation, leading to damage and cracking from high-temperature molten slag, thus affecting service life. Adjacent slag flushing trough bodies are joined using a butt joint plate and butt joint groove. A fixing block is inserted into the fixing groove and secured with bolts and threaded grooves, thus pre-fixing the adjacent slag flushing trough bodies and facilitating subsequent sealing treatment at the joint. Attached Figure Description

[0013] Figure 1 This is a front view schematic diagram of the present utility model;

[0014] Figure 2 This is a partially enlarged schematic diagram of part A of this utility model;

[0015] Figure 3 This is a rear view schematic diagram of the present invention;

[0016] Figure 4 This is a partially enlarged schematic diagram of part B of this utility model;

[0017] Figure 5 This is a cross-sectional schematic diagram of the present invention.

[0018] The meanings of the reference numerals in the attached figures are as follows:

[0019] 1. Slag flushing tank body; 2. Cold water inlet pipe; 3. Connecting groove; 4. Cold water heat absorption cavity; 5. External heat dissipation fins; 6. Multi-point water injection pipe; 7. Installation through hole; 8. Threaded groove; 9. Fixing groove; 10. Connecting plate; 11. Fixing block; 12. Fastening bolt; 13. Support frame; 14. Heat absorption plate. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings:

[0021] like Figure 1-5 As shown, the present invention discloses a slag flushing trough structure for a blast furnace, comprising a slag flushing trough body 1. The slag flushing trough body 1 is characterized by: a plurality of multi-point water injection pipes 6 evenly spanning the top of the slag flushing trough body 1; a cold water inlet pipe 2 connected to the middle of the multi-point water injection pipes 6; a cold water heat absorption cavity 4 penetrating the inner side of the outer wall of the slag flushing trough body 1; a plurality of external heat dissipation fins 5 evenly distributed on the outer side of the slag flushing trough body 1; and a plurality of heat absorption plates 14 evenly distributed on the contact surfaces between the external heat dissipation fins 5 and the bottom side of the slag flushing trough body 1, with the heat absorption plates 14 extending into the inner side of the cold water heat absorption cavity 4.

[0022] The top of the slag flushing tank body 1 is evenly provided with multiple installation through holes 7, and the multi-point water injection pipe 6 is connected to the cold water heat absorption cavity 4 through the installation through holes 7.

[0023] The supporting frame 13 is evenly arranged inside the cold water heat absorption cavity 4.

[0024] A fixing groove 9 is provided on one side of the outer wall of the slag flushing tank body 1. A threaded groove 8 is provided inside the fixing groove 9. A fixing block 11 matching the fixing groove 9 is fixed on the other side of the slag flushing tank body 1. The fixing groove 9 and the fixing block 11 are detachably connected by fastening bolts 12.

[0025] A docking groove 3 is provided on one side of the bottom of the outer wall of the slag flushing tank body 1, and a docking plate 10 matching and fitted with the docking groove 3 is fixed on the other side of the slag flushing tank body 1.

[0026] In use, two adjacent slag flushing tank bodies 1 are spliced ​​together using a butt joint plate 10, a butt joint groove 3, a fixing block 11, and a fixing groove 9. Then, using fastening bolts 12, the two adjacent slag flushing tank bodies 1 are connected and fixed through the threaded groove 8. A water pump is installed on the cold water inlet pipe 2, and one end of the cold water inlet pipe 2 is connected to a cold water tank. When the water pump is started, cold water is injected into multiple locations inside the cold water heat absorption cavity 4 through the cold water inlet pipe 2 and the multi-point water injection pipe 6. Due to the multi-point water injection method, the injection and flow rate of cold water can be increased. The cold water flowing through the cold water heat absorption cavity 4 can absorb the heat generated by the molten slag. At the same time, the heat is dissipated through the heat absorption plate 14 and the external heat dissipation fins 5 by heat conduction, which can enhance the heat absorption capacity and improve the heat dissipation effect. This solves the technical problem that the existing blast furnace slag flushing tanks are usually simple U-shaped structures with poor heat dissipation capacity, which makes the high-temperature molten slag easy to damage the slag flushing tank and cause it to crack, affecting its service life.

Claims

1. A slag flushing trough structure for a blast furnace, comprising a slag flushing trough body (1), characterized in that: The top of the slag flushing tank body (1) is uniformly provided with multiple multi-point water injection pipes (6), and the middle of the multi-point water injection pipes (6) is connected to a cold water inlet pipe (2). The inner side of the outer wall of the slag flushing tank body (1) is provided with a cold water heat absorption cavity (4). Multiple external heat dissipation fins (5) are evenly distributed on the outer side of the slag flushing tank body (1). Multiple heat absorption plates (14) are evenly distributed on the contact surface between the external heat dissipation fins (5) and the bottom side of the slag flushing tank body (1), and the heat absorption plates (14) all extend into the inner side of the cold water heat absorption cavity (4).

2. The slag flushing trough structure for a blast furnace according to claim 1, characterized in that: The slag flushing tank body (1) has multiple installation through holes (7) evenly opened on the top, and the multi-point water injection pipe (6) is connected to the cold water heat absorption cavity (4) through the installation through holes (7).

3. The slag flushing trough structure for a blast furnace according to claim 1, characterized in that: The supporting frame (13) is evenly arranged inside the cold water heat absorption cavity (4).

4. The slag flushing trough structure for a blast furnace according to claim 1, characterized in that: A fixing groove (9) is provided on one side of the outer wall of the slag flushing tank body (1), and a threaded groove (8) is provided inside the fixing groove (9). A fixing block (11) matching the fixing groove (9) is fixed on the other side of the slag flushing tank body (1), and the fixing groove (9) and the fixing block (11) are detachably connected by fastening bolts (12).

5. The slag flushing trough structure for a blast furnace according to claim 1, characterized in that: The bottom side of the outer wall of the slag flushing tank body (1) is provided with a docking groove (3), and the other side of the slag flushing tank body (1) is provided with a docking plate (10) that matches and is fitted with the docking groove (3).

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