Slag tapping system for smelting

Abstract

The utility model relates to the technical field of oxygen-enriched side-blown smelting production, and discloses a slag discharging system for smelting, which comprises a slag discharging pipe arranged obliquely downwards, the end part of the slag discharging pipe is provided with a slag flushing chute, the top ends of the slag discharging pipe and the slag flushing chute are opened, the end part of the slag discharging pipe is provided with a slag outlet, and the slag outlet is provided with a slag outlet. The slag outlet is communicated with the slag flushing chute, a water outlet nozzle is arranged at the end of the slag flushing chute, the slag outlet comprises a slag passing part, slag storage parts symmetrically arranged on the two sides of the slag passing part and an expansion part arranged between the slag storage parts and the slag passing part, and the expansion part is in outwards-expanded arc transition. The slag storage part is located above the slag passing part, and the inner side wall of the end of the slag flushing chute is arranged on the outer side wall of the slag discharging pipe in a wrapping mode.

Description

Technical Field

[0001] The utility model relates to the technical field of oxygen-enriched side-blowing smelting, in particular to a slag tapping system for smelting. Background Art

[0002] A smelting furnace refers to a furnace for melting iron ore. With the increasing number of smelting enterprises, the superiority of oxygen-enriched side-blowing smelting technology has continued to emerge. The slag chute is an important equipment used in the industrial smelting process, mainly used to guide and remove high-temperature slag. The slag produced during the smelting process has a high temperature and is discharged from the slag outlet. The slag chute is used for water quenching and slag removal of the smelting furnace. In the smelting process, the removal of slag is crucial to the smooth progress of production. Therefore, the design and use of the slag chute has a direct impact on improving production efficiency and ensuring operational safety. The existing slag outlet is 100. Figure 5 As shown, the current U-shaped slag outlet is used in the slag discharge process, but the slag outlet is bent or the barrel groove is low, which may splash during the flow, and the contact area with the air is relatively large, making it difficult to maintain the temperature. Utility Model Content

[0003] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a slag discharge system for smelting, which increases the flow rate of slag and is safer and more heat-insulating.

[0004] The technical solution of the present utility model is: a slag discharge system for smelting, comprising a slag discharge pipe arranged obliquely downward, a slag flushing chute being arranged at the end of the slag discharge pipe, the slag discharge pipe and the slag flushing chute are both arranged with top openings, a slag outlet is provided at the end of the slag discharge pipe, the slag outlet is connected with the slag flushing chute, a water outlet nozzle is provided at the end of the slag discharge chute, the slag outlet comprises a slag passing portion, a slag storage portion symmetrically arranged on both sides of the slag passing portion, and an expansion portion arranged between the slag storage portion and the slag passing portion, the expansion portion presents an outward-expanding arc transition, the slag storage portion is located above the slag passing portion, and the inner side wall of the end of the slag flushing chute is covered on the outer side wall of the slag discharge pipe.

[0005] It can be seen from the above scheme that the slag outlet is used for slag discharge, the slag flushing pipe discharges water through the water outlet nozzle, and the slag discharged from the slag outlet is cooled by water quenching. The expansion part expands outward in a circular arc transition, which is convenient for insulating the slag at the end. The end of the slag flushing chute is adapted to the slag outlet to prevent splashing when the water outlet nozzle sprays water and the slag reacts. The slag outlet of the utility model can not only increase the flow rate of slag, but is also safer and more heat-insulating than the traditional one to a certain extent, and the rate is also more stable, especially the slag outlet with a bend.

[0006] A smoke exhaust assembly is located above the water outlet nozzle. The assembly includes a negative pressure fan, a smoke hood, and a flue. The smoke hood is connected to the negative pressure fan via the flue. The smoke hood is located above the slag outlet. The negative pressure fan is connected to a dust removal device. As can be seen, the negative pressure fan is used to absorb the smoke generated during water quenching through negative pressure, reduce fog accumulation through exhaust, improve the indoor environment, and simultaneously transport the smoke to the dust removal device, reducing environmental pollution. It can also significantly reduce the workload of the slag chute and increase the service life of the equipment.

[0007] The cross-section of the slag chute is a flat-bottomed U-shaped arrangement, with the top opening wider than the bottom. This increases the bottom spraying area, making it easier for high-temperature liquid slag to be quenched by water and less likely to cause explosions, effectively eliminating safety hazards.

[0008] The smoke collecting hood is a movable smoke collecting hood. As can be seen, the smoke collecting hood is movable, which facilitates maintenance while reducing the size of the smoke collecting hood, thereby ensuring the smoke and dust collection effect of the smoke collecting hood.

[0009] The front end of the slag chute is provided with a raised section near the slag outlet, and the inner sidewall of the raised section is adapted to the outer sidewall of the slag outlet. As can be seen, the raised section is used to effectively prevent splashing of water-quenched slag at the connection between the slag chute and the slag outlet, making it safer to use.

[0010] The water outlet at the end of the water outlet nozzle is flat. As can be seen, the flat mouth of the water outlet nozzle increases the water flow and water pressure, can effectively quench the high-temperature liquid slag, and the slag liquid is easy to disperse and is not likely to cause explosions. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a partial structural diagram of the utility model;

[0012] Figure 2 It is a cross-sectional view of the slag outlet;

[0013] Figure 3 It is a structural diagram of the utility model;

[0014] Figure 4 It is a cross-sectional view of the connection between the slag outlet and the slag chute;

[0015] Figure 5 It is the existing slag outlet structure. DETAILED DESCRIPTION

[0016] The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention.

[0017] like Figures 1 to 5As shown, the utility model is a slag discharge system for smelting, comprising a slag discharge pipe 1 arranged obliquely downward, a slag chute 2 is provided at the end of the slag discharge pipe 1, the slag discharge pipe 1 and the slag chute 2 are both opened at the top, the cross-section of the slag chute 2 is a flat-bottomed U-shaped setting, the width of the top opening of the slag chute 2 is greater than the bottom width, the end of the slag discharge pipe 1 is provided with a slag outlet 3, the slag outlet 3 is connected to the slag chute 2, the end of the slag chute 2 is provided with a water outlet nozzle 4, the water outlet of the end of the water outlet nozzle 4 is flat, the slag outlet 3 includes a slag passing portion 11, a slag storage portion 12 symmetrically arranged on both sides of the slag passing portion 11 and an expansion portion 13 arranged between the slag storage portion 12 and the slag passing portion 11, the expansion portion 13 is an outward-expanding arc transition, the slag storage portion 12 is located above the slag passing portion 11, and the inner side wall of the end of the slag chute 2 is covered on the outer side wall of the slag discharge pipe 1. The slag flushing chute 2 is made of refractory material. In this embodiment, the slag flushing chute 2 is made of heat-resistant steel. One end of the slag flushing chute 2 is covered on the outer wall of the slag discharge pipe 1, and its inner end face is closed. A water outlet nozzle 4 is provided on the inner end face for water discharge. The slag flushing chute 2 is inclined on the ground, and the inclination angle of the slag discharge pipe 1 is greater than the inclination angle of the slag flushing chute 2.

[0018] A smoke exhaust component is correspondingly arranged above the water outlet nozzle 4, and the smoke exhaust component includes a negative pressure fan 51, a smoke collecting hood 52 and a flue 53. The smoke collecting hood 52 is connected to the negative pressure fan 51 through the flue 53. The smoke collecting hood 52 is correspondingly arranged above the slag outlet 3. The negative pressure fan 51 is connected to a dust removal device, and the smoke collecting hood 52 is a movable smoke collecting hood.

[0019] The front end of the slag chute 2 is provided with a raised section 20 near the slag outlet 3, and the inner wall of the raised section 20 is adapted to the outer wall of the slag outlet 3. In this embodiment, the curvature of the inner wall of the raised section is adapted to the curvature of the outer wall of the slag outlet.

[0020] The working process of the present invention is as follows: the slag flows out from the slag outlet 3 of the slag discharge pipe 1 and enters the slag flushing chute 2. The water outlet nozzle 4 flushes water outward, quenching the outflowing slag water and then flowing out from the slag discharge chute 2. In the slag treatment system, and because a large amount of mist is generated during the slag cooling process, which affects vision and operation, the negative pressure fan 51 is used to improve the exhaust efficiency, reduce the accumulation of mist, and improve the indoor environment. At the same time, through reasonable air volume and air pressure, the flue gas can be effectively transported to the dust removal equipment, reducing environmental pollution, and can also fully reduce the workload of the slag flushing chute 2, thereby increasing the service life of the equipment.

[0021] Finally, it should be emphasized that the above description is not intended to limit the present invention. For those skilled in the art, the present invention may have various changes and modifications. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A slag tapping system for smelting, comprising a slag tapping pipe (1) arranged obliquely downward, a slag flushing chute (2) being provided at the end of the slag tapping pipe (1), the slag tapping pipe (1) and the slag flushing chute (2) both being arranged with top openings, characterized in that: The end of the slag discharge pipe (1) is provided with a slag discharge port (3), the slag discharge port (3) is communicated with the slag flushing chute (2), the end of the slag flushing chute (2) is provided with a water outlet nozzle (4), the slag discharge port (3) includes a slag passing portion (11), a slag storage portion (12) symmetrically arranged on both sides of the slag passing portion (11), and an expansion portion (13) arranged between the slag storage portion (12) and the slag passing portion (11), the expansion portion (13) is in the form of an outwardly expanding arc transition, the slag storage portion (12) is located above the slag passing portion (11), and the inner side wall of the end of the slag flushing chute (2) is covered on the outer side wall of the slag discharge pipe (1).

2. A slag tapping system for smelting according to claim 1, characterized in that: A smoke exhaust component is correspondingly provided above the water outlet nozzle (4), and the smoke exhaust component comprises a negative pressure fan (51), a smoke collecting hood (52) and a flue (53). The smoke collecting hood (52) is connected to the negative pressure fan (51) through the flue (53). The smoke collecting hood (52) is correspondingly provided above the slag outlet (3), and the negative pressure fan (51) is connected to a dust removal device.

3. A slag tapping system for smelting according to claim 1, characterized in that: The cross-section of the slag flushing chute (2) is in a flat-bottomed U-shape, and the width of the top opening of the slag flushing chute (2) is greater than the width of the bottom.

4. A slag tapping system for smelting according to claim 2, characterized in that: The smoke collecting hood (52) is a movable smoke collecting hood.

5. The slag tapping system for smelting according to claim 1, characterized in that: A raised section (20) is provided at the front end of the slag flushing chute (2) near the slag outlet (3), and the inner side wall of the raised section (20) is adapted to the outer side wall of the slag outlet (3).

6. A slag tapping system for smelting according to claim 1, characterized in that: The water outlet at the end of the water outlet nozzle (4) is arranged in a flat shape.

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