Blast furnace slag-water separation system

Abstract

The utility model relates to a blast furnace slag-water separation system which structurally comprises a separation platform, a trolley set moving in the preset direction is arranged on the separation platform, the trolley set comprises a plurality of slag filtering trolleys connected in sequence, each slag filtering trolley comprises a trolley body and a filtering frame, and each filtering frame is hinged to one side of the corresponding trolley body. A blast furnace water slag outlet and a discharging device are arranged above the separation platform in the moving direction of the trolley set, a transfer platform used for containing a transfer trolley is arranged on one side of the separation platform, the position of the transfer platform corresponds to that of the discharging device, the height of the transfer platform is lower than that of the separation platform, and a drainage ditch is formed in the separation platform. A blowing device is arranged on the separation platform, the position of the blowing device corresponds to the position of the discharging device, and the blowing device is located on one side of the advancing direction of the trolley set. According to the slag-water separation device, the slag-water separation capacity cannot be influenced by foamed slag and slag cotton, the blast furnace slag flushing water treatment efficiency can be effectively guaranteed, and stable, continuous and instant slag-water separation is achieved.

Description

Technical Field

[0001] The utility model relates to a slag-water separation technology, in particular to a blast furnace slag-water separation system. Background Art

[0002] Slag flushing with water, i.e., pre-furnace slag flushing, is a method of producing blast furnace slag. Due to its convenient operation, low investment, and uniform granulation of slag, it can provide cheap raw materials for the cement industry, so this method has been widely used in large, medium and small blast furnaces of steel enterprises. In a high-temperature molten state, blast furnace slag is rapidly cooled with water to become granulated foam-shaped slag, which is milky white, light, crisp, porous, and easy to grind into fine powder. It is a soft material for foamed silicate building products, slag sound-absorbing bricks, and insulation layers and water-absorbing layers. The slag needs to be separated by slag-water separation technology.

[0003] At present, common slag-water separation technologies can be divided into:

[0004] (1) Drum dehydration method: After water quenching or mechanical granulation, the slag flows to the drum dehydrator for dehydration. The former is the INBA method (Inba method) and the latter is the TYNA method (Tula method). The Tula method has obtained a national invention patent in my country, with the publication number CN1199778A. The patent name is Metallurgical Slag Granulation Device, and the patent owner is Baotou Iron and Steel Design and Research Institute of MCC Group.

[0005] (2) Slag pool filtration method: The slag-water mixture flows into the sedimentation tank, and the slag is caught by a grab crane. The water in the slag pool is drained through the filter layer at the bottom or side of the slag pool. Bottom filtration plus backwashing device is generally called OCP method (bottom filtration method).

[0006] (3) Dewatering tank method: The slurry after water quenching is transported to the dewatering tank by a slurry pump for dehydration. This method is commonly known as the RA-SA method (Lhasa method).

[0007] (4) Lifting dehydration method: The slag flow of blast furnace molten slag is first mechanically crushed, quenched with water, and then separated from the slag and water by lifting dehydration in the pool. The lifting dehydrator can be a screw conveyor or a bucket elevator. The former is called the cage method or the Minter method, and the latter is called the "HK" method.

[0008] Common problems in the operation of traditional slag-water separation processes include: if the water temperature is high, a large amount of foam slag, slag cotton and a large amount of steam will be generated during slag flushing, which is not conducive to water-slag transportation, slag sedimentation and slag filter tank operation; the slag flushing water pressure is high, and slag cotton is easily generated during slag flushing. The slag cotton is not easy to precipitate and remove, and it is easy to clog the filter layer after entering the slag filter tank, affecting the capacity of the filter tank; the slag-water separation process using the filter tank method or the sedimentation tank method cannot be disposed of due to the huge tank area and the operation of slag grabbing facilities, causing environmental pollution.

[0009] Therefore, a new blast furnace slag water separation system is urgently needed to effectively overcome the adverse effects of foamy slag and slag wool on slag water separation, improve the blast furnace slag water treatment efficiency, and achieve smooth, continuous and instant slag water separation. Utility Model Content

[0010] The utility model aims to provide a blast furnace slag water separation system to solve the problem of difficulty and low efficiency in blast furnace slag water treatment due to the generation of a large amount of foam slag and slag wool in the existing traditional slag water separation process.

[0011] The utility model is implemented as follows: a blast furnace slag water separation system comprises a separation platform, a trolley group moving along a predetermined direction is arranged on the separation platform, the trolley group comprises a plurality of filter slag trolleys connected in sequence, the filter slag trolley comprises a vehicle body and a filter frame, the filter frame is hinged to one side of the vehicle body, a blast furnace slag outlet and a discharge device are arranged above the separation platform along the moving direction of the trolley group, a transfer platform for accommodating a transfer vehicle is arranged on one side of the separation platform, the position of the transfer platform corresponds to the discharge device, the height of the transfer platform is lower than that of the separation platform, and a drainage ditch is arranged on the separation platform.

[0012] As a further improvement of the blast furnace slag water separation system of the utility model, a purging device is arranged on the separation platform, the position of the purging device corresponds to the position of the unloading device, and the purging device is located on one side of the forward direction of the trolley group.

[0013] As a further improvement of the blast furnace slag water separation system of the utility model, a collecting cover is arranged above the separation platform, and the collecting cover is located above the blast furnace slag water outlet.

[0014] As a further improvement of the blast furnace slag water separation system of the utility model, the drainage ditch is connected to a slag flushing water pool, the collecting hood is connected to the slag flushing water pool through a recovery pipeline, and an induced draft fan and a condenser are arranged on the recovery pipeline.

[0015] As a further improvement of the blast furnace slag water separation system of the utility model, the unloading device is an electric unloading hoist.

[0016] As a further improvement of the blast furnace slag water separation system of the utility model, a track is arranged on the separation platform, the trolley group moves along the track, and a traction trolley is arranged in front of the trolley group.

[0017] As a further improvement of the blast furnace slag water separation system of the utility model, the purge device includes a Roots blower and a purge pipe.

[0018] As a further improvement of the blast furnace slag water separation system of the utility model, the distance between the water slag outlet and the unloading device is a multiple of the total length of the slag filter trolley.

[0019] The utility model proposes a brand-new slag-water separation system, which is moved along a predetermined direction by a trolley group. The trolley group includes several slag filter trolleys. After the blast furnace is discharged from the slag, the slag flushing water is flushed to the blast furnace slag outlet through the slag ditch. When the slag filter trolley passes the blast furnace slag outlet, the blast furnace slag outlet discharges the slag flushing water into the filter frame of the slag filter trolley, and the water is filtered out while the granular slag is trapped in the filter frame. After a slag filter trolley is filled with slag, the trolley group moves forward so that the next slag filter trolley is located below the blast furnace slag outlet to receive the slag flushing water. The slag filter trolleys filled with slag particles and drained of most of the water pass through the unloading device in turn, and dump the slag particles in the filter frame into the carriage of the transfer vehicle located on the transfer platform, thereby completing the slag-water separation.

[0020] When unloading, use a purge device to purge the dumped filter frame on one side to completely remove the fine slag particles trapped on the filter frame.

[0021] The utility model adopts a collecting hood to process the white smoke plume generated in the slag-water separation process, thereby achieving white smoke elimination treatment.

[0022] The utility model adopts a filtering trolley to form a trolley group. The bottom surface and four walls of the filtering frame of the filtering trolley are filtering surfaces. The dehydration area far exceeds the filtering area of ​​the filter tank. The dehydration capacity is much greater than the capacity of the slag filter tank, and the filtering capacity will not be affected by foam slag and slag cotton. It can effectively ensure the treatment efficiency of blast furnace slag water and realize smooth, continuous and instant slag water separation. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural diagram of the utility model.

[0024] Figure 2 yes Figure 1 AA view.

[0025] In the figure: 1. separation platform; 2. transfer platform; 3. track; 4. traction trolley; 5. slag filter trolley; 6. blast furnace slag outlet; 7. collecting hood; 8. unloading device; 9. purge device; 10. induced draft fan; 11. recovery pipeline; 12. condenser; 13. slag flushing pool; 14. drainage ditch; 15. transfer vehicle; 5-1. vehicle body; 5-2. filter frame; 9-1. Roots blower; 9-2. purge pipe. DETAILED DESCRIPTION

[0026] The utility model will be further described below in conjunction with the accompanying drawings.

[0027] like Figure 1 , Figure 2As shown, the utility model is a blast furnace slag water separation system, including a separation platform 1 and a transfer platform 2, a trolley group moving in a predetermined direction is arranged on the separation platform 1, the trolley group includes a plurality of filter slag trolleys 5 connected in sequence, the filter slag trolley 5 includes a car body 5-1 and a filter frame 5-2, the filter frame 5-2 is hinged to one side of the car body 5-1, a blast furnace water slag outlet 6 and a discharge device 8 are arranged above the separation platform 1, and with the forward direction of the trolley group as a reference, the discharge device 8 is located in front of the blast furnace water slag outlet 6, that is, the filter slag trolley 5 of the trolley group passes through the blast furnace water slag outlet 6 and then passes through the discharge device 8 when moving forward. The transfer platform 2 is located on one side of the separation platform 1, and the position of the transfer platform 2 corresponds to the discharge device 8, and the height of the transfer platform 2 is lower than the separation platform 1, so that when the discharge device 8 drives the filter frame 5-2 to flip to one side, the material in the filter frame 5-2 just falls into the carriage of the transfer vehicle 15 on the transfer platform 2.

[0028] The blast furnace slag outlet 6 is connected to the slag ditch of the blast furnace. After the blast furnace slags out, the slag flushing water is flushed to the slag outlet through the slag ditch.

[0029] A track 3 is provided on the separation platform 1, and the trolley group moves along the track 3. A traction trolley 4 is provided in front of the trolley group, and each filter residue trolley 5 is pulled by the traction trolley 4 to move along the track 3. The filter frame 5-2 is a structure with an open top, and the surroundings and the bottom of the filter frame 5-2 are filter surfaces, and the diameter of the filter holes on the filter surface is smaller than the diameter of the slag particles.

[0030] A drainage ditch 14 is also provided on the separation platform 1. The drainage ditch 14 is generally located below the blast furnace slag outlet 6 and below the front of the blast furnace slag outlet 6, and the length of the drainage ditch 14 should be the length of multiple slag filter trolleys 5 (generally at least the length of three slag filter trolleys 5), so that when the blast furnace slag outlet 6 discharges the slag flushing water into the filter frame 5-2 of the slag filter trolley 5, the filtered water can flow into the drainage ditch 14, and in the process of the slag filter trolley 5 moving forward, water will still be filtered out, and the water in the slag particles is drained as much as possible, and the filtered water can flow into the drainage ditch 14 in time.

[0031] The unloading device 8 is an electric unloading hoist. When unloading, the electric unloading hoist is connected to one side of the filter frame 5-2 through a sling, and the filter frame 5-2 is turned around the hinge point through unilateral lifting to achieve tilted unloading.

[0032] A purge device 9 is also provided on the separation platform 1. The position of the purge device 9 corresponds to the position of the unloading device 8, and the purge device 9 is located on one side of the forward direction of the trolley group. Generally, the purge device 9 and the transfer platform 2 are located on both sides of the trolley group, and the filter frame 5-2 is flipped toward the transfer platform 2. In this way, after the filter frame 5-2 is flipped by the unloading device 8, the slag particles in the filter frame 5-2 that have been drained of water are dumped into the compartment of the transfer vehicle 15, and the purge device 9 is started to purge the filter frame 5-2 to remove the slag particles remaining on the filter frame 5-2.

[0033] The purging device 9 includes a Roots blower 9-1 and a purging pipe 9-2. The purging pipe 9-2 is provided with a plurality of purging holes, and the purging holes are directly facing the filter frame 5-2, so as to purge the filter frame 5-2.

[0034] A collecting hood 7 is also provided above the separation platform 1, and the collecting hood 7 is located above the blast furnace slag outlet 6 and above the front of the blast furnace slag outlet 6. The slag flushing water discharged from the blast furnace slag outlet 6 will generate white smoke plumes in the filter frame 5-2, and the generated white smoke plumes are collected by the collecting hood 7 for a certain period of time, thereby reducing the white smoke plumes from escaping into the environment and reducing the pollution to the environment.

[0035] The drainage ditch 14 is connected to the slag flushing water pool 13, and the collection hood 7 is connected to the slag flushing water pool 13 through the recovery pipeline 11, and the induced draft fan 10 and the condenser are arranged on the recovery pipeline 11. The water collected by the drainage ditch 14 is collected in the slag flushing water pool 13, and the collection hood 7 collects the white smoke plume through the induced draft fan 10, and the white smoke plume is cooled by the condenser 12 to form condensed water, which is connected to the slag flushing water pool 13 through the recovery pipeline 11. The water in the slag flushing water pool 13 can be subsequently treated and recycled.

[0036] Among them, the distance between the water slag outlet and the unloading device 8 is a multiple of the total length of the slag trolley 5, so that the rear blast furnace water slag outlet 6 discharges slag flushing water to the slag trolley 5 and the front unloading device 8 drives the filter frame 5-2 to unload to the transfer vehicle 15 at the same time, thereby improving the overall water slag separation efficiency.

[0037] The slag-water separation process of the utility model is as follows: a plurality of slag filter trolleys 5 are pulled forward along the track 3 by a traction trolley 4, and the first slag filter trolley 5 moves to the bottom of the blast furnace slag outlet 6 and brakes to a stop; after the blast furnace is discharged, the slag-washing water is flushed to the blast furnace slag outlet 6 through the slag ditch, and the blast furnace slag outlet 6 discharges the slag-washing water into the filter frame 5-2 of the slag filter trolley 5, and the water is filtered out while the granular slag is trapped in the filter frame 5-2, and the filtered water is collected through the drainage ditch 14 and flows into the underground slag-washing pool 13; after the first slag filter trolley 5 is filled with slag, The trolley group moves forward so that the second slag trolley 5 is located below the blast furnace slag outlet 6 to receive the slag flushing water for slag-water separation, and the process is carried out in this order; the slag trolley 5 filled with slag particles and drained of most of the water passes through the unloading device 8 in turn, and the slag particles in the filter frame 5-2 are dumped into the carriage of the transfer vehicle 15 located on the transfer platform 2, and the purge device 9 is turned on to purge the filter frame 5-2 for about 60 seconds to completely remove the fine slag particles trapped in the filter surface; the trolley group returns with the emptied filter frame 5-2 to prepare for the next cycle of slag flushing water treatment.

[0038] The utility model integrates the equipment operation functions into one according to the water quality and composition characteristics of blast furnace slag flushing, reduces the equipment volume, reduces the external moving parts, and reduces the equipment weight. A track 3 is set in the slag flushing site, and a group of trolleys are set according to the processing scale, which are connected in series in the shape of a train. Each trolley is equipped with a filter frame 5-2. The bottom surface and four walls of the filter frame 5-2 are filtering surfaces. The dehydration area far exceeds the filtering area of ​​the filter tank, and its dehydration capacity is far greater than the capacity of the slag filter tank, so the floor space is reduced accordingly. The slag-water mixture directly enters the filter frame 5-2 for separation and treatment, and does not need to be lifted to a high position by a pump for the second time, which reduces the wear of equipment and pipelines. After the filter frame 5-2 is unloaded, the Roots blower 9-1 is used for blowing, and there is no need to use a large amount of water for backwashing. The slag filter trolley 5 with the filter frame 5-2 is serially grouped, and the number of groups can be increased or decreased according to the scale of slag water treatment.

[0039] The water after slag-water separation in the utility model can be recycled as blast furnace slag flushing water. The slag-water separation effect directly affects the smooth operation of blast furnace production slag discharge. Since most of the water slag in the slag flushing water is removed, the pipeline will not be blocked, the equipment wear will be reduced, and the production efficiency will be improved. Through the new slag-water separation structure design and power source design, the automation level and equipment reliability are improved, the equipment failure shutdown is reduced, and the labor intensity of operators cleaning water slag is reduced. By optimizing the filter screen, the slag can achieve a good slag-water separation effect without strong vibration under the action of gravity. The traction trolley 4 is used to drive the slag that has been dried to achieve loading and transportation. The collection hood 7 is used to treat the white smoke plume generated during the slag-water separation process to achieve whitening treatment.

[0040] With the reduction of equipment weight and volume, the investment cost of the newly built slag-water separation system can be reduced, and there is no need to design high-strength mechanical equipment, and no large area of ​​land is occupied. Foreign matter can be cleaned up at any time during the production process, and the cleaning process does not generate dust, which is friendly to the environment and reduces the labor intensity of workers. The utility model does not use a large number of pumps and valves during operation, saving energy consumption, and the water is recycled after separation, and no substances harmful to the environment are generated.

Claims

1. A blast furnace slag water separation system, characterized in that: It includes a separation platform, on which a trolley group moving along a predetermined direction is arranged, the trolley group includes a number of filter slag trolleys connected in sequence, the filter slag trolley includes a car body and a filter frame, the filter frame is hinged to one side of the car body, a blast furnace slag outlet and a unloading device are arranged above the separation platform along the moving direction of the trolley group, a transfer platform for accommodating a transfer vehicle is provided on one side of the separation platform, the position of the transfer platform corresponds to the unloading device, the height of the transfer platform is lower than that of the separation platform, and a drainage ditch is arranged on the separation platform.

2. The blast furnace slag water separation system according to claim 1, characterized in that: A purge device is provided on the separation platform. The position of the purge device corresponds to the position of the unloading device, and the purge device is located on one side of the forward direction of the trolley group.

3. The blast furnace slag water separation system according to claim 1, characterized in that: A collecting hood is arranged above the separation platform, and the collecting hood is located above the blast furnace slag outlet.

4. The blast furnace slag water separation system according to claim 3, characterized in that: The drainage ditch is connected to a slag flushing water pool, and the collecting hood is connected to the slag flushing water pool through a recovery pipeline, and an induced draft fan and a condenser are arranged on the recovery pipeline.

5. The blast furnace slag water separation system according to claim 1, characterized in that: The unloading device is an electric unloading hoist.

6. The blast furnace slag water separation system according to claim 1, characterized in that: A track is arranged on the separation platform, the trolley group moves along the track, and a traction trolley is arranged in front of the trolley group.

7. The blast furnace slag water separation system according to claim 2, characterized in that: The purge device comprises a Roots blower and a purge pipe.

8. The blast furnace slag water separation system according to claim 1, characterized in that: The distance between the water residue outlet and the unloading device is a multiple of the total length of the filter residue trolley.

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