Steel slag smothering device and slag smothering method

Abstract

The present invention relates to the technical field of hot stuffing of steel slag, and in particular to a steel slag stuffing device and a slag stuffing method, comprising a slag stuffing platform, a slag stuffing cover arranged on the slag stuffing platform, a slag flushing trough arranged in the slag stuffing platform, a slag basin arranged in the slag stuffing platform, a sedimentation tank connected to the slag flushing trough and a spraying device arranged on the slag stuffing platform, wherein the spraying device is connected to the sedimentation tank via a pipeline, and an openable cover is provided on the upper end of the slag stuffing cover, which directly stuffs the slag in the slag basin, thereby reducing smoke and dust during the dumping process of the slag basin, and simultaneously reducing dust during the slag stuffing and slag grabbing process in a conventional slag pool.

Description

Technical Field

[0001] The invention relates to the technical field of steel slag hot stuffing, and in particular to a steel slag stuffing device and a steel slag stuffing method. Background Art

[0002] Steel slag hot stuffing treatment technology is an advanced technology to improve the economic benefits of steel mills. The processing and recycling of steel slag is increasingly valued by major steel mills. However, while recycling resources, the steel slag processing production line also produces dust pollution.

[0003] The steel slag treatment technologies in the metallurgical industry include simple slag slag, slag pit slag slag, and pressed slag slag. The main process flow of these slag slag technologies is: dumping into the slag basin from the converter - transporting the slag basin to the slag yard by trailer - unloading the slag from the slag yard - slag slag - digging the slag - magnetic separation and transportation.

[0004] During the slag unloading process, the temperature of steel slag is around 1000℃, which causes a large amount of dust and fine powder to be emitted during the unloading, dumping and slag storage process, causing serious pollution to the environment. Summary of the Invention

[0005] In order to solve the above problems, the present invention provides a steel slag smothering device, which directly smothers the slag in the slag basin, reducing the smoke and dust during the slag basin dumping process, and also reducing the dust during the conventional slag pool smothering and slag grabbing process.

[0006] The technical solution adopted by the present invention is to provide a steel slag slag stifling device, including a slag stifling platform, a slag stifling cover arranged on the slag stifling platform, a slag flushing trough arranged in the slag stifling platform, a slag basin arranged in the slag stifling platform, a sedimentation tank connected to the slag flushing trough and a spraying device arranged on the slag stifling platform, the spraying device is connected to the sedimentation tank by means of a pipeline, and an openable cover is provided on the upper end of the slag stifling cover.

[0007] The invention also comprises a whitening tower, the slag cover is provided with an air outlet, and the whitening tower is connected with the inner cavity of the slag cover by means of a pipeline.

[0008] The desulfurization tower comprises a desulfurization and denitrification module, a heat exchange module and a dehumidification module.

[0009] The spray device includes a water pump, a spray pipe and a nozzle. The input end of the water pump is connected to the sedimentation tank, and the output end of the water pump extends to the inner cavity of the slag hood through the spray pipe. The nozzle is arranged on the spray pipe inside the slag hood.

[0010] The slag suffocation method of the steel slag suffocation device comprises the following steps:

[0011] Step A: The converter pours the slag into a slag basin, and the slag basin filled with the slag is transported to one side of the slag suffocating device;

[0012] Step B: Use a crane to lift the cover of the slag blocking device and place it aside, use a crane to lift the slag basin and place it into the slag blocking cover on the slag blocking table, use a crane to lift the cover onto the slag blocking cover, and seal the slag blocking cover;

[0013] Step C, spraying the steel slag in the slag basin with a spraying device;

[0014] In step D, the smoke generated by the steel slag spraying is discharged outward from the air outlet on the slag hood, and the wastewater generated by the spraying flows into the sedimentation tank through the slag flushing trough, and is precipitated and purified in the sedimentation tank for recycling.

[0015] The slag hood device also includes a whitening tower. The slag hood is provided with an air outlet. The whitening tower is connected to the inner cavity of the slag hood by means of a pipeline. On this basis, the step D also includes step E: the air outlet of the slag hood is connected to the whitening tower by means of a pipeline, and the flue gas is purified before being discharged. The whitening tower includes a desulfurization and denitrification module, a heat exchange module and a dehumidification module, which perform triple purification on the flue gas.

[0016] The method also includes step F, in which after the slag is smothered, the cover is lifted by a crane and placed to one side, and the slag basin is lifted out of the smothering cover, and the slag in the slag basin is transported to the next process by a conveying machine.

[0017] The spraying device includes a water pump, a spray pipe and a nozzle. The input end of the water pump is connected to the sedimentation tank, and the output end of the water pump extends to the inner cavity of the slag hood with the help of the spray pipe. The nozzle is arranged on the spray pipe inside the slag hood. On this basis, the specific process of step C is to start the water pump, transport water from the sedimentation tank to the slag hood with the help of the spray pipe, and spray the steel slag in the slag basin with the help of the nozzle.

[0018] The beneficial effect of the present invention is that it provides a steel slag stifling device, which stifles the slag directly in the slag basin, reduces the smoke and dust during the slag basin dumping process, and at the same time reduces the dust during the slag stifling and slag grabbing process in the conventional slag pool, greatly reducing the pollution to the environment. After the slag is discharged from the converter workshop, the slag basin is transported to the steel slag stifling device by a transport vehicle, and the slag basin is lifted by a crane and placed in the slag stifling cover on the slag stifling platform, and the cover is covered to seal and spray water to stifle the slag. The flue gas generated by the stifling slag is transported to the whitening tower through a pipeline for whitening and purification, further preventing the flue gas from polluting the environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the slag suffocating device of the present invention;

[0020] Figure 2 It is a schematic flow diagram of the slag suffocation method of the present invention.

[0021] In the attached figure, 1, slag stuffing table, 2, slag stuffing cover, 3, slag flushing trough, 4, slag basin, 5, sedimentation tank, 6, cover, 7, whitening tower, 8, water pump, 9, spray pipe, 10, nozzle. DETAILED DESCRIPTION

[0022] like Figure 1 As shown, the present invention provides a steel slag stagnation device, comprising a slag stagnation platform 1, a slag hood 2 arranged on the slag stagnation platform 1, a slag flushing trough 3 arranged in the slag stagnation platform 1, a slag basin 4 arranged in the slag stagnation platform 1, a sedimentation tank 5 connected to the slag flushing trough 3 and a spraying device arranged on the slag stagnation platform 1, the spraying device is connected to the sedimentation tank 5 by means of a pipeline, and an openable cover 6 is provided on the upper end of the slag hood 2.

[0023] After the slag is discharged from the converter workshop, the slag basin 4 is transported to the steel slag stuffing treatment room by a transport vehicle, the slag basin 4 is lifted by a crane and placed in the slag cover 2 of the slag stuffing platform 1, and is covered with a cover 6 to seal it. The spray device is controlled to spray water, and the waste heat of the steel slag is used to generate steam. The steam fully reacts with the free CaO and MgO in the steel slag to form stable compounds, and the slag is directly stuffed in the slag basin 4, which reduces the smoke and dust during the dumping process of the slag basin 4, and at the same time reduces the dust during the conventional slag pool slag stuffing and slag grabbing process. A lifting ring is provided on the cover 6 for easy lifting.

[0024] like Figure 1 As shown, a whitening tower 7 is also included. The slag cover 2 is provided with an air outlet. The whitening tower 7 is connected to the inner cavity of the slag cover 2 through a pipeline.

[0025] The smoke and dust generated by the slag are transported to the whitening tower 7 through a pipeline for whitening and purification, which reduces the emission of a large amount of dust and smoke during the slag stuffing process, further reduces the pollution of the smoke and dust to the environment during the slag stuffing, and is more environmentally friendly.

[0026] like Figure 1 As shown, the whitening tower 7 includes a desulfurization and denitrification module, a heat exchange module and a dehumidification module which are arranged in sequence.

[0027] The desulfurization and denitrification module desulfurizes and denitrifies the flue gas, the heat exchange module reduces the temperature of the flue gas, and the dehumidification module reduces the moisture content in the flue gas. The flue gas is discharged after multiple purification treatments, avoiding air pollution.

[0028] like Figure 1 As shown, the spraying device includes a water pump 8, a spray pipe 9 and a nozzle 10. The input end of the water pump 8 is connected to the sedimentation tank 5, and the output end of the water pump 8 extends to the inner cavity of the slag hood 2 by means of the spray pipe 9. The nozzle 10 is arranged on the spray pipe 9 inside the slag hood 2.

[0029] The water pump 8 extracts water from the sedimentation tank 5 and transports it to the slag cover 2 through the spray pipe 9. The water sprays the slag basin 4 through the nozzle 10. The crystal slag trough 3 after spraying flows to the sedimentation tank 5. The water settles in the sedimentation tank 5 and can be recycled.

[0030] like Figure 2 As shown, the present invention provides a slag suffocation method for a steel slag suffocation device, comprising the following steps:

[0031] Step A: The converter pours the slag into the slag basin 4, and the slag basin 4 filled with the slag is transported to one side of the slag suffocating device;

[0032] Step B: Use a crane to lift the cover 6 of the slag blocking device and place it aside, use a crane to lift the slag basin (4) and place it into the slag blocking cover 2 on the slag blocking table 1, use a crane to lift the cover 6 onto the slag blocking cover 2, and seal the slag blocking cover 2;

[0033] Step C: start the water pump 8, transport water from the sedimentation tank 5 to the slag cover 2 through the spray pipe 9, and spray the steel slag in the slag basin 4 through the nozzle 10;

[0034] In step D, the smoke generated by the slag spraying is discharged outward from the gas outlet on the slag hood 2, and the wastewater generated by the spraying flows into the sedimentation tank 5 through the slag flushing trough 3, and is precipitated and purified in the sedimentation tank 5 for recycling.

[0035] Step E: The gas outlet of the slag hood 2 is connected to the whitening tower 7 via a pipeline to purify the flue gas before discharging. The whitening tower 7 includes a desulfurization and denitrification module, a heat exchange module and a dehumidification module to perform triple purification on the flue gas.

[0036] In step F, after the slag is smothered, the cover 6 is lifted by a crane and placed aside, and the slag basin 4 is lifted out of the slag cover 2. The slag in the slag basin 4 is transported to the next process by a conveying machine.

[0037] During the slag unloading process, the temperature of steel slag is about 1000°C, and a large amount of dust and micropowder are discharged during the slag unloading, dumping and slag sealing, which pollutes the environment. The present invention seals the slag directly in the slag basin, reducing the smoke and steps in the slag basin dumping process, and at the same time reducing the dust in the slag sealing and slag grabbing process of the conventional slag pool, that is, reducing a large amount of dust in the slag sealing process. The smoke generated during the slag sealing is discharged after triple purification in the whitening tower, which effectively avoids pollution to the environment, shortens the slag sealing steps, reduces the safety hazards of workers, and greatly improves the work efficiency of the slag sealing.

Claims

1. A slag suffocation method for a steel slag suffocation device, characterized in that: The slag-smothering device comprises a slag-smothering platform (1), a slag-smothering cover (2) arranged on the slag-smothering platform (1), a slag-flushing trough (3) arranged in the slag-smothering platform (1), a slag basin (4) arranged in the slag-smothering platform (1), a sedimentation tank (5) connected to the slag-flushing trough (3), and a spraying device arranged on the slag-smothering platform (1), wherein the spraying device is connected to the sedimentation tank (5) via a pipeline, and an openable cover (6) is provided at the upper end of the slag-smothering cover (2); On this basis, the slag suffocation method comprises the following steps: Step A: The converter pours the slag into the slag basin (4), and the slag basin (4) filled with the slag is transported to one side of the slag-suppressing device; Step B, using a crane to lift the cover (6) of the slag blocking device and place it to one side, using a crane to lift the slag basin (4) and place it into the slag blocking cover (2) on the slag blocking table (1), using a crane to lift the cover (6) onto the slag blocking cover (2), and sealing the slag blocking cover (2); Step C, the spraying device sprays the steel slag in the slag basin (4); In step D, the smoke generated by the slag spraying is discharged outward from the gas outlet on the slag hood (2), and the wastewater generated by the spraying flows into the sedimentation tank (5) through the slag flushing trough (3), and is precipitated and purified in the sedimentation tank (5) and recycled.

2. The slag suffocation method according to claim 1, characterized in that: The slag hood (2) is provided with an air outlet, and the slag hood (2) is connected to the inner cavity of the slag hood (2) by means of a pipeline. On this basis, the step D is followed by a step E: the air outlet of the slag hood (2) is connected to the slag hood (7) by means of a pipeline, and the flue gas is purified before being discharged. The slag hood (7) comprises a desulfurization and denitrification module, a heat exchange module and a dehumidification module, and performs triple purification on the flue gas.

3. The slag suffocation method according to claim 2, characterized in that: The process also includes step F, wherein after the slag is smothered, the cover (6) is lifted by a crane and placed to one side, and the slag basin (4) is lifted out of the smothering cover (2), and the slag in the slag basin (4) is transported to the next process by a conveying machine.

4. The slag suffocation method according to claim 1, characterized in that: The spraying device includes a water pump (8), a spray pipe (9) and a nozzle (10), the input end of the water pump (8) is connected to the sedimentation tank (5), the output end of the water pump (8) extends to the inner cavity of the slag cover (2) with the help of the spray pipe (9), and the nozzle (10) is arranged on the spray pipe (9) in the slag cover (2). On this basis, the specific process of step C is to start the water pump (8), transport water from the sedimentation tank (5) to the slag cover (2) with the help of the spray pipe (9), and spray the steel slag in the slag basin (4) with the help of the nozzle (10).

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