Device for preventing overflow of slag flushing water of blast furnace

Abstract

The utility model relates to a device for preventing overflow of blast furnace slag flushing water, and relates to the technical field of iron slag recovery. The system comprises a granulation tower and further comprises a first slag flushing pool and a second slag flushing pool which are arranged adjacently, the granulation tower is communicated with a three-way pipe, the three-way pipe comprises an input end and two output ends, the input end of the three-way pipe is communicated with the granulation tower, one output end of the three-way pipe is communicated with the first slag flushing pool, and the other output end of the three-way pipe is communicated with the second slag flushing pool. And gate valves are arranged at the two output ends. The device has the effects that the iron slag recovery efficiency is improved, the cleaning frequency of the granulation tower is reduced, and the use safety of related equipment in the iron slag recovery process is guaranteed.

Description

Technical Field

[0001] The present application relates to the technical field of iron slag recycling, and particularly to a device for preventing overflow of blast furnace slag water. Background Art

[0002] Blast furnace ironmaking is a process in which coke reacts with oxygen in the air at high temperature to generate reducing gases such as carbon monoxide and hydrogen, and then the reducing gases react with oxides in iron ore to reduce iron from its oxides to form liquid iron. Since the cost of blast furnace ironmaking is relatively high, recycling the by-product iron slag generated by blast furnace ironmaking is an important way to save costs. In actual production, the high-temperature iron slag generated by blast furnace ironmaking flows into the iron slag ditch through a slag skimmer and enters the granulation tower for flushing and cooling with water, forming water slag that is flushed into the slag pond. The water is recovered through sedimentation and recycled, and the cooled iron slag is grabbed by a grab and transported onto a conveyor belt. However, since the granulation tower is only equipped with one slag pond, during the process of grabbing the iron slag with a grab, the granulation tower needs to stop operating, which affects the overall efficiency of iron slag recycling. Moreover, during this process, the high-temperature iron slag will remain in the granulation tower and cannot be flushed out in time, making it difficult to clean. Workers need to enter the granulation tower for cleaning, which poses a safety hazard and thus needs to be improved. Summary of the Utility Model

[0003] In order to improve the efficiency of iron slag recycling, reduce the cleaning frequency of the granulation tower, and ensure the safe use of related equipment in the iron slag recycling process, the present application provides a device for preventing overflow of blast furnace slag water.

[0004] The device for preventing overflow of blast furnace slag water provided by the present application adopts the following technical solution:

[0005] A device for preventing overflow of blast furnace slag water includes a granulation tower, and also includes a first slag pond and a second slag pond arranged adjacent to each other. The granulation tower is communicated with a three-way pipe. The three-way pipe includes one input end and two output ends. The input end of the three-way pipe is communicated with the granulation tower. One of the output ends is communicated with the first slag pond, and the other output end is communicated with the second slag pond. Plug valves are arranged at both output ends.

[0006] By adopting the above technical solution, during the process of iron slag recovery, the iron slag enters the three-way pipe from the granulation tower. First, the sluice valve corresponding to the first slag flushing pool is opened, and the water slag will enter the first slag flushing pool. After the first slag flushing pool is filled with water slag, the sluice valve corresponding to the first slag flushing pool is closed, and the sluice valve corresponding to the second slag flushing pool is opened, thereby discharging slag into the second slag flushing pool. During the process of discharging slag into the second slag flushing pool, the first slag flushing pool can be slagged by the grab bucket. The first slag flushing pool and the second slag flushing pool are used alternately, so that it is not necessary to close the outlet of the granulation tower, enabling the high-temperature iron slag to be continuously discharged, not easily deposited in the granulation tower, reducing the cleaning difficulty of the granulation tower, and improving the operation safety and the iron slag recovery efficiency.

[0007] Optionally, the three-way pipe is located between the first slag flushing pool and the second slag flushing pool, and the two output ends are symmetrically arranged with respect to the center line of the input end.

[0008] By adopting the above technical solution, the three-way pipe is arranged between the first slag flushing pool and the second slag flushing pool, enabling the water slag to stably enter the first slag flushing pool or the second slag flushing pool, avoiding the problem that the water slag is likely to enter another slag flushing pool or splash on the surfaces of the two slag flushing pools when discharged through the output end due to inaccurate setting of the position of the three-way pipe, effectively improving the accuracy of water slag discharge, reducing the waste of circulating water, and improving the iron slag recovery efficiency.

[0009] Optionally, a sump is arranged on one side of the first slag flushing pool and the second slag flushing pool. The first slag flushing pool and the second slag flushing pool are both connected to an upper tower water pump, and the upper tower water pump is arranged in the sump.

[0010] By adopting the above technical solution, the sump is set and the upper tower water pump is arranged in the sump, facilitating the extraction of the water at the bottom of the first slag flushing pool and the second slag flushing pool, so that the water can be recycled, saving water resources and improving the iron slag recovery efficiency at the same time.

[0011] Optionally, an overflow trough is arranged between the two output ends. The overflow trough is connected to the three-way pipe. An outlet is opened on the side wall of the overflow trough far from the input end, and the outlet is connected to both the first slag flushing pool and the second slag flushing pool.

[0012] By adopting the above technical solution, when the sluice valve fails to open normally, the water slag will accumulate in the three-way pipe, and the water in the water slag will overflow from the top cover plate of the sluice valve and then flow into the sump along the sluice valve, causing the upper tower water pump and other equipment in the sump to be soaked by water and affecting the normal use of these equipment. By setting the overflow valve, the water slag can be discharged when the sluice valve fails to open, thereby protecting the safety of the upper tower water pump and other equipment and extending the service life.

[0013] Optionally, an overflow baffle is provided at the connection between the overflow trough and the tee pipe.

[0014] By adopting the above technical solution, under the restriction of the overflow baffle, when the height of the water slag in the tee pipe is relatively low, the water slag cannot enter the overflow trough, but is discharged along the two output ends, so that the flow direction of the water slag can be accurately controlled, and the iron slag recovery efficiency of the first slag flushing pool and the second slag flushing pool can be improved.

[0015] Optionally, a guiding surface is provided on the bottom wall of the water outlet, and the guiding surface is inclined towards the bottom of the first slag flushing pool and the second slag flushing pool.

[0016] By adopting the above technical solution, the opening of the guiding surface enables the water slag to flow towards the first slag flushing pool or the second slag flushing pool under the action of gravity, improving the problem that the water slag falls into the water outlet, the water flows, and the iron slag deposits in the water outlet, causing blockage of the overflow trough, and improving the safety and smoothness during the use of the device of the present application.

[0017] Optionally, a partition plate is provided in the water outlet, and the partition plate is located on the center line of the input end.

[0018] By adopting the above technical solution, the setting of the partition plate enables the water slag to stably enter the first slag flushing pool or the second slag flushing pool, improving the problem that the water slag directly flows out through the water outlet and splashes on the surface at the connection of the first slag flushing pool and the second slag flushing pool, thereby effectively improving the utilization rate of the circulating water and the recovery rate of the iron slag.

[0019] Optionally, a cover plate is hinged to the top end of the overflow trough.

[0020] By adopting the above technical solution, the cover plate is hinged to the top end of the overflow trough, which is convenient for the staff to open the cover plate to clean the inside of the overflow trough, so as to ensure the normal flow of the water slag in the overflow trough, reducing the cleaning difficulty of the overflow trough and improving the practicability and convenience of the device of the present application.

[0021] In summary, the present application includes at least one of the following beneficial technical effects:

[0022] 1. Open the plug valve corresponding to the first slag flushing pool, and the water slag will enter the first slag flushing pool. After the first slag flushing pool is filled with water slag, close the plug valve corresponding to the first slag flushing pool and open the plug valve corresponding to the second slag flushing pool, so as to discharge slag into the second slag flushing pool. During the process of discharging slag into the second slag flushing pool, the first slag flushing pool can be slagged by the grab bucket. The first slag flushing pool and the second slag flushing pool are used alternately, so that it is not necessary to close the outlet of the granulation tower, enabling the continuous discharge of high-temperature iron slag, which is not easy to deposit in the granulation tower, reducing the cleaning difficulty of the granulation tower, and improving the operation safety and the iron slag recovery efficiency;

[0023] 2. When the gate valve fails to open normally due to a fault, water slag will accumulate in the three-way pipe, and the moisture in the water slag will overflow through the top cover of the gate valve, and then flow into the pit along the gate valve, so that the upper tower water pump and other equipment in the pit are soaked in water, affecting the normal use of these equipment. By setting an overflow valve, the water slag can be discharged when the gate valve fails to open, thereby protecting the safety of equipment such as the upper tower water pump and extending its service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of a device for preventing blast furnace slag flushing water from overflowing in an embodiment of the present application.

[0025] Figure 2 It is a schematic diagram of the structure of the overflow tank in the embodiment of the present application.

[0026] Figure 3 It is a cross-sectional view of the overflow trough in the embodiment of the present application.

[0027] Explanation of the reference numerals in the accompanying drawings: 1. Granulation tower; 2. No. 1 slag flushing tank; 3. No. 2 slag flushing tank; 4. Tee pipe; 41. Input end; 42. Output end; 5. Gate valve; 6. Pit; 7. Upper tower water pump; 8. Overflow trough; 81. Water outlet; 82. Overflow baffle; 83. Guide surface; 84. Partition plate; 85. Cover plate; 9. Slag ditch. DETAILED DESCRIPTION

[0028] The following is combined with Figures 1-3 This application is described in further detail.

[0029] The present application discloses a device for preventing blast furnace slag flushing water from overflowing. Figure 1 , including a granulation tower 1, a No. 1 slag flushing pool 2 and a No. 2 slag flushing pool 3. One end of the granulation tower 1 is connected with a slag groove 9 for introducing high-temperature slag into the granulation tower 1. The No. 1 slag flushing pool 2 and the No. 2 slag flushing pool 3 are adjacently arranged on the side of the granulation tower 1 away from the slag groove 9. A three-way pipe 4 is arranged between the granulation tower 1 and the No. 1 slag flushing pool 2 and the No. 2 slag flushing pool 3. The three-way pipe 4 is arranged between the No. 1 slag flushing pool 2 and the No. 2 slag flushing pool 3. The three-way pipe 4 includes an input end 41 and two output ends 42. The input end 41 is connected to the granulation tower 1 for discharging water slag. The two output ends 42 are symmetrically arranged about the center line of the input end 41, one of the output ends 42 is connected to the No. 1 slag flushing pool 2, and the other output end 42 is connected to the No. 2 slag flushing pool 3, so as to prevent slag from flowing toward the slag flushing pool. The openings of the two output ends 42 are both provided with gate valves 5 for controlling the opening and closing of the output ends 42.

[0030] Reference Figure 1, a pit 6 is provided on the ground on one side of the first slag flushing pool 2 and the second slag flushing pool 3. The side walls of the first slag flushing pool 2 and the second slag flushing pool 3 are both connected to an upper tower water pump 7. The upper tower water pump 7 is arranged in the pit 6 and is used to pump out the water at the bottom of the first slag flushing pool 2 and the second slag flushing pool 3 and input it into the granulation tower 1 for recycling.

[0031] Refer to Figure 1 , Figure 2 and Figure 3 , an overflow trough 8 is arranged between the two output ends 42 to discharge the water slag when the slide gate valve 5 fails to open normally. The overflow trough 8 is connected to the three-way pipe 4. An overflow baffle 82 is arranged at one end of the overflow trough 8 close to the three-way pipe 4. The overflow baffle 82 is arranged vertically to block the water slag from entering the overflow trough 8. When the slide gate valve 5 cannot be opened and the height of the water slag in the three-way pipe 4 exceeds the overflow baffle 82, the water slag will enter the overflow trough 8 through the overflow baffle 82; an outlet 81 is arranged on the side of the overflow trough 8 away from the three-way pipe 4. A guiding surface 83 is arranged on the bottom wall of the outlet 81 and is inclined towards the bottom of the first slag flushing pool 2 and the second slag flushing pool 3 to facilitate the flow of the water slag and reduce the probability of blockage of the overflow trough 8; a partition plate 84 is arranged in the outlet 81. The partition plate 84 is located between the first slag flushing pool 2 and the second slag flushing pool 3 to enable the water slag passing through the outlet 81 to enter the corresponding slag flushing pool, reduce the water slag from falling on the abutting surface of the first slag flushing pool 2 and the second slag flushing pool 3, and improve the utilization rate of the circulating water and the recovery rate of the iron slag; a cover plate 85 is hinged at the top of the overflow trough 8 for the staff to open regularly to clean the inside of the overflow trough 8.

[0032] The implementation principle of the overflow prevention device for blast furnace slag flushing water in the embodiment of the present application is as follows: during the process of iron slag recovery, the iron slag enters the three-way pipe 4 from the granulation tower 1. First, the slide gate valve 5 corresponding to the first slag flushing pool 2 is opened, and the water slag will enter the first slag flushing pool 2. After the first slag flushing pool 2 is filled with water slag, the slide gate valve 5 corresponding to the first slag flushing pool 2 is closed, and the slide gate valve 5 corresponding to the second slag flushing pool 3 is opened to discharge slag into the second slag flushing pool 3. During the process of discharging slag into the second slag flushing pool 3, the first slag flushing pool 2 can be slagged by the grab bucket. The first slag flushing pool 2 and the second slag flushing pool 3 are used alternately, so that the outlet of the granulation tower 1 does not need to be closed, and the high-temperature iron slag can be continuously discharged; when the slide gate valve 5 fails to open normally, when the water slag in the three-way pipe 4 reaches a certain height, it will enter the overflow trough 8 through the overflow baffle 82, and then enter the first slag flushing pool 2 or the second slag flushing pool 3 through the overflow trough 8, thus avoiding the problem that the water overflows from the top plate of the slide gate valve 5 and enters the pit 6, damaging other equipment such as the upper tower water pump 7, and improving the safety of the overall process equipment.

[0033] The above are all preferred embodiments of this application, and the protection scope of this application is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of this application shall be covered within the protection scope of this application.

Claims

1. A device for preventing blast furnace slag water from overflowing, comprising a granulating tower (1), characterized in that: It also comprises a No. 1 slag flushing pool (2) and a No. 2 slag flushing pool (3) which are arranged adjacent to each other. The granulating tower (1) is connected to a three-way pipe (4). The three-way pipe (4) comprises an input end (41) and two output ends (42). The input end (41) of the three-way pipe (4) is connected to the granulating tower (1), one of the output ends (42) is connected to the No. 1 slag flushing pool (2), and the other output end (42) is connected to the No. 2 slag flushing pool (3). Both output ends (42) are provided with a gate valve (5).

2. A device for preventing blast furnace slag flushing water from overflowing according to claim 1, characterized in that: The three-way pipe (4) is located between the first slag flushing pool (2) and the second slag flushing pool (3), and the two output ends (42) are symmetrically arranged with respect to the center line of the input end (41).

3. The device for preventing blast furnace slag flushing water from overflowing according to claim 1, characterized in that: A pit (6) is arranged on one side of the No. 1 slag flushing pool (2) and the No. 2 slag flushing pool (3); the No. 1 slag flushing pool (2) and the No. 2 slag flushing pool (3) are both connected to an upper tower water pump (7); and the upper tower water pump (7) is arranged in the pit (6).

4. The device for preventing blast furnace slag flushing water from overflowing according to claim 1, characterized in that: An overflow trough (8) is provided between the two output ends (42), the overflow trough (8) is connected to the three-way pipe (4), a water outlet (81) is provided on the side wall of the overflow trough (8) away from the input end (41), and the water outlet (81) is connected to both the No. 1 slag flushing pool (2) and the No. 2 slag flushing pool (3).

5. The device for preventing blast furnace slag flushing water from overflowing according to claim 4, characterized in that: An overflow baffle (82) is provided at the connection point between the overflow groove (8) and the three-way pipe (4).

6. The device for preventing blast furnace slag flushing water from overflowing according to claim 4, characterized in that: The bottom wall of the water outlet (81) is provided with a guide surface (83), and the guide surface (83) is arranged to be inclined toward the bottom of the No. 1 slag flushing pool (2) and the No. 2 slag flushing pool (3).

7. The device for preventing blast furnace slag flushing water from overflowing according to claim 4, characterized in that: A partition plate (84) is provided in the water outlet (81), and the partition plate (84) is located on the center line of the input end (41).

8. The device for preventing blast furnace slag flushing water from overflowing according to claim 4, characterized in that: A cover plate (85) is hingedly connected to the top of the overflow trough (8).

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