Liquid high-temperature slag quenching device

Abstract

The utility model belongs to the technical field of blast furnace ironmaking slag treatment, and particularly discloses a liquid high-temperature slag quenching device which comprises a steel pipe and a wedge-shaped body, a spray head is fixedly connected to the steel pipe, a baffle is fixedly connected to the spray head, a plurality of through holes are formed in the baffle, the spray head is located above a slag flushing trough, and the steel pipe is placed on the wedge-shaped body. The spray head is located on the opposite side of the slag outlet, and a water supply assembly for injecting water into the steel pipe is arranged on the steel pipe. An existing slag quenching device cannot timely quench molten slag into water slag, so that slag is accumulated in a slag sluice. The baffle is additionally arranged at the water outlet of an original full-open slag quenching device, the baffle is provided with the through hole, the outlet water pressure is increased by reducing the area of the outlet, meanwhile, the slag quenching device is placed on the wedge-shaped body with a certain inclination angle, the water outlet of the slag quenching device inclines downwards compared with the tail end of the slag quenching device, and the slag quenching effect is improved. And finally, the water flow is sprayed out in an arc shape, the water flow speed is increased, the slag is scattered through high-speed water flow while the water flow makes contact with the slag for slag quenching, and slag accumulation in the slag flushing trough is prevented.

Description

Technical Field

[0001] This utility model relates to the field of blast furnace slag treatment technology, specifically to a liquid high-temperature slag quenching device. Background Technology

[0002] Blast furnace ironmaking is an industrial process that reduces iron ore to iron. In this process, iron ore, fuel, and flux melt at high temperatures, forming molten iron and slag. Gangue from the iron ore and ash from the fuel fuse with the flux to form liquid slag, simply called "molten slag." This molten slag needs to be water-quenched during production, meaning the slag is rapidly cooled with water or wastewater, causing it to solidify into water-quenched slag. This water-quenched slag has a rough, porous surface and is lightweight and brittle, easily broken into granules. The purpose of transforming molten slag into water-quenched slag is to improve the utilization value of the slag, reduce environmental pollution, and improve the slag's properties.

[0003] A slag quenching device is a device that uses continuous water outlet to contact the molten slag discharged from the blast furnace, rapidly cooling the slag and solidifying it to form water-quenched slag. The common slag water quenching treatment method under the existing technology is horizontal flow water quenching, which uses continuous water outlet to contact the molten slag discharged from the blast furnace and flow into the slag flushing ditch, rapidly cooling and dispersing the slag, and finally quenching the slag into granular water slag. The water flow carries the quenched slag into the water slag pool.

[0004] However, during normal slag and iron discharge from the blast furnace, the taphole initially has a diameter of φ45mm. In the later stages of slag loading, the taphole diameter expands to 50mm-60mm due to the scouring effect of slag and iron. At this point, the slag-iron flow velocity increases, especially the molten slag discharge, which increases with the extension of tapping time, sometimes reaching an instantaneous velocity of 8t / min. This increase in molten slag discharge and velocity means that maintaining normal slag quenching requires a simultaneous increase in the water output per unit time of the slag quenching device, i.e., increasing water pressure and flow rate. Because the outlet of the slag quenching device used in horizontal flow water quenching is fully open, the horizontal flow water quenching will exhibit insufficient water pressure and flow rate, failing to cool the molten slag into water-slag particles in time. This easily leads to slag accumulation and sedimentation at the bottom of the slag flushing ditch, causing blockage due to lack of airflow. Stopping the water supply at this point will result in a series of abnormal problems such as slag overflow in the slag flushing ditch and displacement of the ditch cover, seriously affecting the normal production of the blast furnace and posing significant safety risks. Utility Model Content

[0005] The purpose of this invention is to provide a liquid high-temperature slag quenching device to solve the problem that existing quenching devices cannot quench molten slag into water slag in time, resulting in slag accumulation in the slag flushing channel.

[0006] To achieve the above objectives, the basic solution provided by this utility model is as follows: a liquid high-temperature slag quenching device, comprising a steel pipe and a wedge-shaped body, a nozzle fixedly connected to one end of the steel pipe, a baffle fixedly connected to the end of the nozzle away from the steel pipe, a plurality of through holes provided on the baffle, the nozzle being located above the slag flushing ditch, the steel pipe being placed on the wedge-shaped body, the nozzle being located on the opposite side of the slag outlet, and a water supply component for injecting water into the steel pipe being provided at the other end of the steel pipe.

[0007] The principle and beneficial effects of this utility model are as follows: By modifying the original slag quenching device with a fully open outlet, a baffle is added to the outlet. The baffle has a through hole. When the slag quenching device needs to use water to quench the molten slag coming out of the slag outlet, the water flows to the outlet and is blocked by the baffle and exits through the through hole. By reducing the outlet area, the water pressure increases instantaneously. At the same time, the slag quenching device is placed on a wedge with a certain inclination angle, so that the outlet of the slag quenching device is tilted downward relative to the tail end of the slag quenching device. Finally, the water flows out in an arc shape, and the water flow speed increases. This achieves slag quenching by contacting the molten slag and using high-speed water flow to disperse the molten slag, so as to prevent slag accumulation in the slag flushing groove.

[0008] Option 2, a preferred option of the basic scheme, includes a water supply assembly comprising pipe 1 connected to a steel pipe, with a water pump connected to the other end of pipe 1. Pipe 2 is connected to the water pump, with a water tank connected to the other end of pipe 2. This water supply assembly facilitates the supply of water to the slag quenching device.

[0009] Option 3, a preferred option of the basic scheme, features elliptical through-holes. By making the through-holes elliptical, the radiation range of the ejected water flow can be increased.

[0010] Option 4, a preferred option of Option 3, features a crisscross arrangement of through-holes. Since molten slag is a fluid with varying amounts, an increase in slag volume leads to an increase in the cross-sectional area of ​​the slag flow. The crisscross arrangement of through-holes helps adapt to the increased slag volume, thus maintaining effective slag flushing and preventing slag accumulation.

[0011] Option 5, the preferred option of the basic scheme, uses a duckbill nozzle. By setting the nozzle to a duckbill type, it is easier to further enhance water pressure and flow rate by reducing the outlet diameter.

[0012] Option 6, an optimal choice from the basic option, features a zinc coating on the inner walls of both the steel pipes and the nozzles. Since the slag flushing device uses steel pipes and nozzles that are frequently in contact with water, they are prone to rust. The zinc coating helps prevent rusting to some extent, thus reducing the frequency of replacement of the slag flushing device.

[0013] Option 7, a preferred option of the basic scheme, has a baffle size that is half the size of the nozzle opening. By setting the baffle size to half the size of the nozzle opening, it is easier to maintain sufficient water flow while meeting the requirements of high-speed water quenching slag flushing, so as to better quench the molten slag into water slag particles. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of a liquid high-temperature slag quenching device;

[0015] Figure 2 This is a top view of a liquid high-temperature slag quenching device;

[0016] Figure 3 This is a schematic diagram of the baffle and through holes of a liquid high-temperature slag quenching device. Detailed Implementation

[0017] The present invention will be further described in detail below through specific embodiments:

[0018] The reference numerals in the accompanying drawings of the instruction manual include: steel pipe 1, wedge-shaped body 2, nozzle 3, baffle 4, through hole 5, slag flushing ditch 6, slag outlet 7, pipe one 8, water pump 9, pipe two 10, and water tank 11.

[0019] Example

[0020] like Figures 1 to 3 As shown: A liquid high-temperature slag quenching device includes a steel pipe 1 and a wedge-shaped body 2. A nozzle 3 is welded to one end of the steel pipe 1. The nozzle 3 is a duckbill type nozzle. The inner walls of both the steel pipe 1 and the nozzle 3 are provided with a zinc layer. A baffle 4 is welded to the end of the nozzle 3 away from the steel pipe 1. The size of the baffle 4 is half the size of the nozzle 3 opening. The baffle 4 is provided with several through holes 5. Each through hole 5 is elliptical and the through holes 5 are arranged in a crisscross pattern. The nozzle 3 is located above the slag flushing groove 6. The steel pipe 1 is placed on the wedge-shaped body 2, and the nozzle 3 is located on the opposite side of the slag outlet 7.

[0021] The other end of the steel pipe 1 is provided with a water supply assembly for injecting water into the steel pipe 1. The water supply assembly includes a first pipe 8, which is connected to the steel pipe 1. The other end of the first pipe 8 is connected to a water pump 9, and the second pipe 10 is connected to the water pump 9. The other end of the second pipe 10 is connected to a water tank 11.

[0022] The implementation method of this embodiment is as follows:

[0023] When it is necessary to quench the molten slag into water slag particles and flush them away, first turn on the water pump 9. Use the water pump 9 to inject the water in the water tank 11 into the steel pipe 1 through the second pipe 10 and the first pipe 8. Then the water flows through the nozzle 3. A part of the water is sprayed out of the nozzle 3 through the through hole 5 to form a high-speed water flow. The rest of the water flows out from the opening below the baffle 4. At the same time, the slag outlet 7 continuously discharges the molten slag. The molten slag comes into contact with the high-speed water flow in the air and is quenched into water slag particles. The water slag particles then exist in the slag flushing ditch 6. Finally, the water slag particles are flushed into the water slag pool by the water flow.

[0024] The above descriptions are merely embodiments of this utility model, and common knowledge regarding specific structures and characteristics is not elaborated upon here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the structure of this utility model, and these should also be considered within the scope of protection of this utility model. These modifications will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application shall be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A liquid high temperature slag granulation apparatus, characterized by, The utility model relates to a water injection device for steel pipe, including steel pipe (1) and wedge (2), one end of steel pipe (1) is fixed with shower nozzle (3), the shower nozzle (3) is fixed with baffle (4) away from the one end of steel pipe (1), be equipped with a plurality of through -hole (5) on baffle (4), the shower nozzle (3) is located above the slag flushing ditch (6), steel pipe (1) is placed on wedge (2), the shower nozzle (3) is located at the opposite side of the slag outlet (7), the other end of steel pipe (1) is equipped with the water supply assembly for the water injection of steel pipe (1).

2. A liquid high temperature slag granulation device as claimed in claim 1, wherein, The water supply assembly includes a pipeline (8) that is in communication with the steel pipe (1), the other end of the pipeline (8) is in communication with a water pump (9), the water pump (9) is in communication with a pipeline (10), the other end of the pipeline (10) is in communication with a water tank (11).

3. A liquid high temperature slag granulation device as claimed in claim 1, wherein, Each of the through holes (5) is elliptical.

4. A liquid high temperature slag granulation device as claimed in claim 3, wherein, The through holes (5) are arranged in a longitudinal and horizontal staggered manner.

5. A liquid high temperature slag granulation device as claimed in claim 1, wherein, The shower nozzle (3) is a duckbill type shower nozzle.

6. A liquid high temperature slag granulation device as claimed in claim 1, wherein, The inner walls of the steel pipe (1) and the shower nozzle (3) are each provided with a zinc layer.

7. A liquid high temperature slag granulation device as claimed in claim 1, wherein, The size of the baffle (4) is half the size of the mouth of the shower nozzle (3).

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