CN220432859U - Slag flow control device for realizing continuous air quenching and granulating of steel slag in multiple furnaces - Google Patents
Slag flow control device for realizing continuous air quenching and granulating of steel slag in multiple furnaces Download PDFInfo
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- CN220432859U CN220432859U CN202321659658.4U CN202321659658U CN220432859U CN 220432859 U CN220432859 U CN 220432859U CN 202321659658 U CN202321659658 U CN 202321659658U CN 220432859 U CN220432859 U CN 220432859U
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- 239000002893 slag Substances 0.000 title claims abstract description 281
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 52
- 239000010959 steel Substances 0.000 title claims abstract description 52
- 238000010791 quenching Methods 0.000 title claims abstract description 38
- 230000000171 quenching effect Effects 0.000 title claims abstract description 38
- 239000007788 liquid Substances 0.000 claims abstract description 47
- 238000000034 method Methods 0.000 claims abstract description 23
- 230000008569 process Effects 0.000 claims abstract description 23
- 230000007246 mechanism Effects 0.000 claims abstract description 9
- 230000000903 blocking effect Effects 0.000 claims description 32
- 239000007787 solid Substances 0.000 claims description 10
- 238000005469 granulation Methods 0.000 claims description 8
- 230000003179 granulation Effects 0.000 claims description 8
- 238000004513 sizing Methods 0.000 claims description 8
- 238000007599 discharging Methods 0.000 claims description 5
- 238000011084 recovery Methods 0.000 abstract description 11
- 238000005516 engineering process Methods 0.000 description 8
- 230000008859 change Effects 0.000 description 7
- 239000002918 waste heat Substances 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 6
- 101100298225 Caenorhabditis elegans pot-2 gene Proteins 0.000 description 5
- 238000009628 steelmaking Methods 0.000 description 4
- 238000012827 research and development Methods 0.000 description 3
- 238000003723 Smelting Methods 0.000 description 2
- 239000006227 byproduct Substances 0.000 description 2
- 238000009749 continuous casting Methods 0.000 description 2
- 238000007731 hot pressing Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000001020 rhythmical effect Effects 0.000 description 1
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Abstract
The utility model discloses a process slag flow control device for realizing continuous air quenching and granulating of steel slag, which comprises a platform frame and slag tanks filled with molten steel slag, wherein the platform frame is provided with a combined double-tank slag tank tipping platform for alternately receiving the slag tanks, and the combined double-tank slag tank tipping platform is provided with a slag tank tipping mechanism for driving two slag tanks on double tank positions to tip alternately; a track is arranged below one side of the combined double-tank slag tank tipping table, a tundish car which walks on the track is arranged on the track, and two dam overflow type tundish for improving the flow condition of the tipped slag in the slag tank are arranged on the tundish car along the traveling direction of the tundish car; a swinging liquid slag diversion trench capable of swinging between the two slag tanks is obliquely arranged between the dam overflow type tundish and the slag tanks; an air quenching nozzle is arranged below the rail. The utility model can improve the comprehensive efficiency of the steel slag wind quenching granulating and heat recovery system.
Description
Technical Field
The utility model relates to the technical field of steel slag waste heat recovery and resource utilization, in particular to a slag flow control device for realizing continuous air quenching granulation of steel slag in multiple furnaces.
Background
The molten steel slag is a byproduct of the steelmaking production process, and is produced by smelting molten steel in one furnace to obtain steel slag accounting for about 10% of molten steel, and the molten steel and the liquid slag in each furnace are respectively poured into a ladle and a slag pot, so that the smelting process has the characteristic of obvious periodicity. The annual output of the molten steel slag is high, the temperature is high, and the high-quality waste heat resource which is not recycled at present is provided. In the research and development process of the steel slag waste heat recovery technology at home and abroad in the past, the steel slag has complex components and different physical properties, but almost encounters the same bottleneck problem that the comprehensive efficiency of a recovery system is lower, and the energy efficiency index directly restricts the industrialized application of the waste heat recovery technology.
In the actual application of the existing steel slag byproduct treatment process, technical specifications of steel slag treatment process (GB/T29514-2018) and steel slag treatment and comprehensive utilization technical standards (GB/T51387-2019) are technical recommendations of feasible treatment processes and technical specifications of related professions, wherein the molten steel slag pot type hot-pressing technology is difficult to utilize because the steel slag and water exchange heat, although vapor with certain temperature and pressure is produced, the water is directly contacted with the steel slag, so that the vapor carries dust with unstable content and is extremely easy to cause hardening on the surface of equipment, and the temperature and pressure of the vapor are extremely unstable due to the vapor sources collected by a plurality of hot-pressing tanks, so that the existing production enterprises are basically free of air.
The dry air quenching granulating process of the molten steel slag is considered as a necessary process way for realizing waste heat recovery, the steel slag is firstly required to be granulated into particles as fine and uniform as possible, then a proper heat exchange medium is adopted to carry out full heat exchange with the steel slag, and the maximum recovery of the sensible heat of the steel slag can be realized through a plurality of heat exchange means of radiation, convection and conduction.
Meanwhile, due to the periodical and rhythmic production characteristics of steelmaking, the process flow of the system also needs to consider the contradiction between the intermittent deslagging and the continuity of heat utilization. For the treatment process of single-tank steel slag, when each tank is produced, the system equipment needs to be started and stopped, the heat source is intermittently supplied, the system equipment is alternately cold and hot, and steel slag loss is generated in each tank, so that the operation rate of the system equipment and the steel slag wind quenching rate are reduced, and the improvement of the comprehensive efficiency of the system is greatly limited. In the field of metallurgical manufacturing, a multi-furnace continuous casting technology of molten steel, namely a continuous casting technology, has been very mature through research and development for many years, and economic and technical indexes of a steelmaking process are remarkably improved, but multi-furnace continuous treatment technology research on steelmaking steel slag is not found yet, and particularly a multi-furnace continuous production technology aiming at steel slag air quenching granulation and waste heat recovery technology is not found. In order to realize the industrial utilization of the waste heat resources of the steel slag as soon as possible, the research and development of a continuous air quenching granulating system for the multi-furnace steel slag is urgent.
Disclosure of Invention
The utility model aims to solve the technical problem of providing a slag flow control device for realizing continuous air quenching and granulating of steel slag in multiple furnaces so as to improve the comprehensive efficiency of a steel slag air quenching and granulating and heat recovery system.
In order to solve the technical problems, the technical scheme adopted by the utility model is as follows.
The slag flow control device for realizing continuous air quenching and granulating of the steel slag comprises a platform frame and slag tanks filled with molten steel slag, wherein a combined double-tank slag tank tilting table for alternately receiving the slag tanks is arranged on the platform frame, and a slag tank tilting mechanism for driving two slag tanks on the double-tank position to tilt alternately is arranged on the combined double-tank slag tank tilting table; a track parallel to the combined double-tank slag tank tipping table is arranged below one side of the combined double-tank slag tank tipping table, a tundish car which walks on the track is arranged on the track, and two dam overflow type tundish which is used for improving the flow condition of the slag liquid tipped out of the slag tank are arranged on the tundish car along the traveling direction of the tundish car; a swinging liquid slag guide groove which can swing between the two slag tanks and is used for guiding slag liquid poured out of the slag tanks into the dam overflow type tundish is obliquely arranged between the dam overflow type tundish and the slag tanks; and an air quenching nozzle used for air quenching and granulating slag liquid discharged by the dam overflow type tundish is arranged below the rail.
Preferably, the inclination angle of the swing type liquid slag diversion trench is larger than 30 degrees.
Preferably, an accident slag pot for receiving slag liquid splashing in the slag pot tipping process and slag flow overflow in the dam overflow type tundish is arranged below the swing type liquid slag diversion trench.
Preferably, the platform frame comprises three working space areas of a slag pot tipping operation platform, a slag flow emergency treatment channel and a tundish quick replacement operation platform which are arranged in a step form; the combined type double-tank slag tank tipping platform is arranged on a slag tank tipping operation platform, an accident slag tank is arranged on a slag flow emergency treatment channel, a track and a swing type liquid slag diversion trench are both arranged on a tundish quick replacement operation platform, and an air quenching nozzle is arranged at the lower part of the tundish quick replacement operation platform.
Preferably, an upper slag blocking wall and a lower slag blocking wall for changing the slag flow direction and blocking solid slag clusters in slag flow are arranged in the dam overflow type tundish in a staggered manner along the flow direction of slag flow inertia, an overflow port for discharging the solid slag clusters to fall into an accident slag pot is arranged above the rear wall of the dam overflow type tundish, and a sizing flow nozzle for discharging slag liquid is arranged below the front wall of the dam overflow type tundish.
Preferably, the horizontal distance between the upper slag blocking wall and the lower slag blocking wall is 150-200 cm, and the height of the overflow port is 150-200 cm higher than the wall top of the lower slag blocking wall.
By adopting the technical scheme, the utility model has the following technical progress.
According to the utility model, through the combined double-tank slag tank tipping table, the swing type liquid slag diversion trench, the dam overflow type tundish, the tundish car, the track and the accident slag tank, the slag flow control in the continuous air quenching and granulating process of the steel slag can be realized, so that the comprehensive efficiency of the steel slag air quenching and granulating and heat recovery system is improved; the device is divided into three operation space areas of a slag pot tilting operation platform, a tundish quick replacement operation platform and a slag flow emergency treatment channel according to the operation and maintenance characteristics of the device, and meanwhile, the platform frame for arranging and installing the air quenching nozzles is considered, so that safe production can be ensured to the greatest extent, mutual interference of different operations is reduced, and high-efficiency continuous operation is realized.
Drawings
FIG. 1 is a top view of the present utility model;
fig. 2 is a side view of the present utility model.
Wherein: 1. the slag ladle comprises a platform frame, a slag ladle tipping operation platform, a tundish quick-change operation platform, a slag flow emergency treatment channel, a slag ladle, a combined double-tank slag ladle tipping platform, a swing type liquid slag diversion groove, a dam overflow type tundish, an upper slag blocking wall, a lower slag blocking wall, an overflow port, a sizing flow nozzle, a tundish car, a track, an accident slag ladle and an air quenching nozzle.
Detailed Description
The utility model will be described in further detail with reference to the drawings and the detailed description.
The utility model provides a process slag flow control device for realizing continuous air quenching granulation of steel slag, which is shown in combination with fig. 1 to 2, and comprises a platform frame 1, a combined double-tank slag ladle tipping platform 3, a swinging type liquid slag diversion trench 4, a dam overflow type tundish 5, a tundish car 6, a track 7 and an accident slag ladle 8, wherein main devices of the combined double-tank slag ladle tipping platform 3, the swinging type liquid slag diversion trench 4, the dam overflow type tundish 5, the tundish car 6, the track 7 and the accident slag ladle 8 are arranged in a step mode through the platform frame 1, so that the liquid slag flow can realize rapid flow depending on the height fall of the device position.
The platform frame 1 comprises three working space areas of a slag ladle tipping operation platform 11, a tundish quick change operation platform 12 and a slag flow emergency treatment channel 13, wherein the three working space areas are arranged in a stepped form, the specific slag ladle tipping operation platform 11 is higher than the tundish quick change operation platform 12, and the slag flow emergency treatment channel 13 is positioned between the slag ladle tipping operation platform 11 and the tundish quick change operation platform 12 and lower than the tundish quick change operation platform 12.
The combined double-tank slag tank tipping platform 3 is arranged on the slag tank tipping operation platform 11, and the combined double-tank slag tank tipping platform 3 is used for alternately receiving slag tanks 2 containing molten steel slag. The combined double-tank slag tank tilting table 3 is provided with a slag tank tilting mechanism which is used for driving the two slag tanks 2 on the double-tank position to tilt alternately. The slag pot tilting mechanism is in the prior art, and the specific structure thereof is not described herein.
The track 7 and the swing type liquid slag diversion trench 4 are both arranged on the tundish quick change operation platform 12.
The track 7 is arranged below one side of the combined double-tank slag tank tipping table 3 through a tundish quick-change operating platform 12, and the track 7 is arranged parallel to the combined double-tank slag tank tipping table 3. The tundish car 6 walks on the rail 7. The dam overflow type tundish 5 is arranged on the tundish car 6 in two and is arranged along the travelling direction of the tundish car 6.
The swinging type liquid slag diversion trench 4 is one, is obliquely arranged between the slag pot 2 and the dam overflow type tundish 5 and can swing between the two slag pots 2, and the inclination angle of the swinging type liquid slag diversion trench 4 is larger than 30 degrees so as to realize rapid flow of slag flow and solid slag clusters and reduce the bonding quantity of steel slag, thereby guiding the slag liquid which is tipped in the slag pot 2 into the dam overflow type tundish 5 positioned at the outlet of the swinging type liquid slag diversion trench 4. The specific structure of the swing type liquid slag diversion trench 4 is not limited herein, and can consist of a diversion trench and a driving mechanism, wherein the diversion trench is obliquely arranged between the slag pot 2 and the dam overflow type tundish 5; the driving mechanism is used for driving the diversion trench to swing and can be a telescopic cylinder, a motor and the like.
The two dam overflow type tundish 5 walk on the track 7 through the tundish car 6, so that the outlet of the swing type liquid slag diversion trench 4 is alternately positioned. The dam overflow tundish 5 is used to improve the flow conditions of the slag stream poured out of the slag pot 2.
The dam overflow tundish 5 comprises an upper slag blocking wall 51, a lower slag blocking wall 52, an overflow port 53 and a sizing flow nozzle 54.
The upper slag blocking wall 51 and the lower slag blocking wall 52 are respectively arranged above the inner part of the dam overflow type tundish 5, the top of the upper slag blocking wall 51 is vertically connected with the top wall of the dam overflow type tundish 5, and two ends of the upper slag blocking wall 51 are vertically connected with the side wall of the dam overflow type tundish 5; the lower slag blocking wall 52 is arranged below the inside of the dam overflow type tundish 5, the bottom of the lower slag blocking wall 52 is vertically connected with the bottom wall of the dam overflow type tundish 5, and two ends of the lower slag blocking wall 52 are vertically connected with the side wall of the dam overflow type tundish 5; the upper slag blocking wall 51 and the lower slag blocking wall 52 are staggered in the flow direction of slag flow inertia. The horizontal distance between the upper slag wall 51 and the lower slag wall 52 is 150-200 cm, and the lower edge of the upper slag wall 51 is basically the same height as the wall top of the lower slag wall 52. The upper slag blocking wall 51 and the lower slag blocking wall 52 change the slag flow direction in the form of a blocking dam to block solid slag clusters in the slag flow, and meanwhile, the slag liquid buffered by the blocking dam overflow type tundish 5 stabilizes the slag flow.
The overflow ports 53 are arranged above the rear wall of the dam overflow type tundish 5, the number of the overflow ports 53 is 1-2, the height of the overflow ports 53 is 150-200 cm higher than the wall top of the lower slag blocking wall 52, and the total width of the overflow ports 53 is about half of the width of the rear wall of the dam overflow type tundish 5. When the solid slag clusters blocked by the upper slag blocking wall 51 and the lower slag blocking wall 52 are gathered to a certain height in the dam overflow type tundish 5, the solid slag clusters are discharged through the overflow port 53 under the action of slag flow surge, so that the interference to the slag flow velocity field in the dam overflow type tundish 5 is reduced.
A sizing spout 54 is provided below the front wall of the dam overflow tundish 5, the sizing spout 54 being for discharging slag. The lower part of the tundish quick change operation platform 12 is provided with an air quenching nozzle 9, and the air quenching nozzle 9 is used for air quenching and granulating slag liquid discharged by the sizing flow nozzle 54.
In order to ensure the operation safety of the process slag flow control, the accident slag pot 8 is arranged on the slag flow emergency treatment channel 13 and is positioned below the swinging liquid slag diversion trench 4. The accident slag pot 8 is used for receiving slag liquid splashing during the tilting process of the slag pot 2, slag flow overflow in the dam overflow type tundish 5 and solid slag mass discharged from the overflow port 53. In order to facilitate the hoisting of the accident slag pot 8, the swing limit position of the swing type liquid slag diversion trench 4 can be far away from the upper area of the accident slag pot 8, and at the moment, the upper space of the slag flow emergency treatment channel 13 is beneficial to the hoisting operation of the accident slag pot 8.
The device also comprises a PLC controller, and the PLC controller is used for realizing the operation control of the device. The output end of the PLC is respectively connected with the slag pot tilting mechanism, the swing type liquid slag diversion trench 4 and the controlled end of the tundish car 6. The PLC controls the swing operation of the swing type liquid slag diversion trench 4 to be interlocked with the slag pot tilting mechanism through the controlled end of the swing type liquid slag diversion trench 4 so as to realize the automatic swing of the swing type liquid slag diversion trench 4; the PLC controller realizes the replacement of the dam overflow type tundish 5 at the outlet of the swing type liquid slag diversion trench 4 by driving the tundish car 6.
When the utility model is used, the combined double-tank slag tank tipping platform 3 alternately receives slag tanks 2 containing molten steel slag, the slag tanks 2 are tipped alternately to pour slag liquid into the swinging liquid slag diversion trenches 4, and slag flows fast and flows into the dam overflow type tundish 5 through the swinging liquid slag diversion trenches 4; slag liquid entering the dam overflow type tundish 5 is discharged from a sizing flow nozzle 54 at the front end of the slag liquid after being blocked and buffered by the dam in the dam overflow type tundish 5 and is quenched and granulated by air. In the above process, the solid slag clusters carried by the slag flow in the dam overflow type tundish 5 are discharged into the accident slag pot 8 arranged in the slag flow emergency treatment channel 13 area through the overflow port 53 of the dam overflow type tundish 5. The dam overflow type tundish 5 after the first multi-furnace continuous air quenching can be quickly replaced according to the deslagging effect of the dam overflow, and then the next multi-furnace continuous air quenching operation is circularly carried out.
According to the utility model, through the combined double-tank slag tank tipping table 3, the swinging type liquid slag diversion trench 4, the dam overflow type tundish 5, the tundish car 6, the track 7 and the accident slag tank 8, the slag flow control in the process of continuous air quenching and granulating of the steel slag can be realized, so that the comprehensive efficiency of a steel slag air quenching and granulating and heat recovery system is improved; the device is divided into three operation space areas of a slag pot tilting operation platform 11, a tundish quick replacement operation platform 12 and a slag flow emergency treatment channel 13 according to the operation and maintenance characteristics of the device, and meanwhile, the platform frame 1 installed by the arrangement of the air quenching nozzles 9 is considered, so that the safety production can be ensured to the greatest extent, the mutual interference of different operations is reduced, and the high-efficiency continuous operation is realized.
Claims (6)
1. The slag flow control device for realizing continuous air quenching and granulating of the steel slag comprises a platform frame (1) and a slag pot (2) filled with molten steel slag, and is characterized in that: the combined double-tank slag tank tipping platform (3) for alternately receiving the slag tanks (2) is arranged on the platform frame (1), and a slag tank tipping mechanism for driving the two slag tanks (2) on the double-tank position to alternately tip is arranged on the combined double-tank slag tank tipping platform (3); a track (7) parallel to the combined double-tank slag tank tipping table (3) is arranged below one side of the combined double-tank slag tank tipping table (3), a tundish car (6) walking on the track (7) is arranged on the track (7), and two dam overflow type tundish (5) for improving the slag flow condition tipped out of the slag tank (2) are arranged on the tundish car (6) along the walking direction of the tundish car (6); a swinging liquid slag guide groove (4) which can swing between the two slag tanks (2) and is used for guiding slag liquid tipped out of the slag tanks (2) into the dam overflow type tundish (5) is obliquely arranged between the dam overflow type tundish (5) and the slag tanks (2); an air quenching nozzle (9) for air quenching and granulating slag liquid discharged by the dam overflow type tundish (5) is arranged below the track (7).
2. The process slag flow control device for realizing continuous air quenching granulation of steel slag in multiple furnaces according to claim 1, wherein the device is characterized in that: the inclination angle of the swing type liquid slag diversion trench (4) is larger than 30 degrees.
3. The process slag flow control device for realizing continuous air quenching granulation of steel slag in multiple furnaces according to claim 1, wherein the device is characterized in that: an accident slag pot (8) for receiving slag liquid splashing in the tilting process of the slag pot (2) and slag flow overflow in the dam overflow type tundish (5) is arranged below the swing type liquid slag diversion trench (4).
4. A process slag flow control device for realizing continuous air quenching granulation of steel slag in multiple furnaces according to claim 3, which is characterized in that: the platform frame (1) comprises three working space areas of a slag pot tilting operation platform (11), a slag flow emergency treatment channel (13) and a tundish quick replacement operation platform (12) which are arranged in a step mode; the combined type double-tank slag tank tipping platform (3) is arranged on a slag tank tipping operation platform (11), an accident slag tank (8) is arranged on a slag flow emergency treatment channel (13), a track (7) and a swinging type liquid slag diversion trench (4) are both arranged on a tundish quick replacement operation platform (12), and an air quenching nozzle (9) is arranged at the lower part of the tundish quick replacement operation platform (12).
5. A process slag flow control device for realizing continuous air quenching granulation of steel slag in multiple furnaces according to claim 3, which is characterized in that: the inside of the dam overflow type tundish (5) is provided with an upper slag blocking wall (51) and a lower slag blocking wall (52) which are used for changing the slag flow direction and blocking solid slag clusters in slag flow in a staggered manner along the flow direction of slag flow inertia, the upper part of the rear wall of the dam overflow type tundish (5) is provided with an overflow port (53) used for discharging the solid slag clusters to fall into an accident slag pot (8), and the lower part of the front wall of the dam overflow type tundish (5) is provided with a sizing flow nozzle (54) used for discharging slag liquid.
6. The process slag flow control device for realizing continuous air quenching granulation of steel slag in multiple furnaces according to claim 5, wherein the device is characterized in that: the horizontal distance between the upper slag blocking wall (51) and the lower slag blocking wall (52) is 150-200 cm, and the height of the overflow port (53) is 150-200 cm higher than the wall top of the lower slag blocking wall (52).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321659658.4U CN220432859U (en) | 2023-06-28 | 2023-06-28 | Slag flow control device for realizing continuous air quenching and granulating of steel slag in multiple furnaces |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321659658.4U CN220432859U (en) | 2023-06-28 | 2023-06-28 | Slag flow control device for realizing continuous air quenching and granulating of steel slag in multiple furnaces |
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| CN220432859U true CN220432859U (en) | 2024-02-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321659658.4U Active CN220432859U (en) | 2023-06-28 | 2023-06-28 | Slag flow control device for realizing continuous air quenching and granulating of steel slag in multiple furnaces |
Country Status (1)
| Country | Link |
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| CN (1) | CN220432859U (en) |
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2023
- 2023-06-28 CN CN202321659658.4U patent/CN220432859U/en active Active
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