CN111014597B - Cooling method and cooling device for high-pulling-speed continuous casting machine - Google Patents
Cooling method and cooling device for high-pulling-speed continuous casting machine Download PDFInfo
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- CN111014597B CN111014597B CN201911293354.9A CN201911293354A CN111014597B CN 111014597 B CN111014597 B CN 111014597B CN 201911293354 A CN201911293354 A CN 201911293354A CN 111014597 B CN111014597 B CN 111014597B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/04—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds
- B22D11/055—Cooling the moulds
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/12—Accessories for subsequent treating or working cast stock in situ
- B22D11/124—Accessories for subsequent treating or working cast stock in situ for cooling
Abstract
The invention discloses a cooling method and a cooling device of a high-pulling-speed continuous casting machine, which comprises a primary cooling process and a secondary cooling process, wherein high-pressure water is introduced into a crystallizer cooling module for cooling through the primary cooling process; introducing high-pressure water into the continuous casting roller way for cooling through a secondary cooling process; hot water flowing out of the cooling water outlet pipes of the primary cooling process and the secondary cooling process is condensed by the condenser and then enters the water supply tank through the condensed water recycling pipe to be used as circulating water for recycling; according to the invention, 3-600 MPa high-pressure water is introduced into the crystallizer cooling module and the interior of each part of the continuous casting roller way for cooling, and the roller way and the surface temperature of the billet can be quickly taken away due to high water pressure and high water flow velocity block, so that the cooling effect is good, the roller way system is less influenced by high temperature, and the quality of the billet is stable; the cooling water recycling treatment process greatly reduces the amount of water required for cooling and reduces the waste of water resources.
Description
Technical Field
The invention belongs to the technical field of metallurgy, and relates to a cooling method and a cooling device for a high-pulling-speed continuous casting machine.
Background
Continuous casting is an intermediate link for connecting steelmaking and steel rolling and is a transition link for converting materials from liquid state to solid state in the process of processing steel products, molten steel is poured into a steel ladle after being smelted by a converter and refining equipment, the steel ladle is placed on a ladle turret, the ladle turret operates in double stations, the continuity of production is ensured, the molten steel in the steel ladle is poured into a tundish through a sliding water gap mechanism, the molten steel is optimized through slow cooling in the tundish and then guided into a slab continuous casting crystallizer through a water gap mechanism, the molten steel is primarily solidified into a billet shell with certain thickness in the crystallizer by utilizing the strong cooling effect in the crystallizer and the uninterrupted regular vibration of the vibrating table, the casting blank is gradually pulled out of the crystallizer at certain speed along with the continuity of pouring and the pulling and straightening of a pulling and straightening machine, enters a secondary cooling area, is continuously cooled and is continuously straightened, until the segment is drawn out to form a casting blank with regular shape.
According to the process, the molten steel forms a uniform blank shell with certain shape and thickness in the crystallizer, the formation and the growth of the blank shell are realized by forcibly cooling the molten steel in the crystallizer, and the cooling condition of the crystallizer directly influences the continuous casting process, the quality of a casting blank and other aspects; the cooling of the crystallizer to the molten steel is realized by continuously feeding cold water into a cooling layer of the crystallizer, but the cooling water supply system of the crystallizer used at present has the following defects: cooling water cannot be recycled, so that waste of water resources is caused; the cooling water has a low flow rate, low cooling efficiency and poor cooling effect in the cooling process, so that the subsequent continuous casting process and the quality of a casting blank are influenced; in addition, after the casting blank is pulled out of the crystallizer at a certain speed, the casting blank enters a secondary cooling area, and the structure of the casting blank is still in an unstable state, so that the quality of the running of a roller way directly influences the internal and external quality of the casting blank, a series of adverse changes of a roller way system are caused by a high-temperature working environment, a series of defects of the casting blank are induced, the quality of the casting blank is finally damaged, the rejection rate is increased, the steel tapping rate is reduced, and the normal production of a continuous casting machine is seriously hindered.
The patent ZL96241376.3 utility model discloses a double-water internal cooling continuous casting roller way, which is drawn out from a water station by cooling water (common circulating water) with the pressure of 0.1-0.15 MPa of gauge pressure, is driven into a hollow beam frame, and is injected into a hollow bearing seat by the beam frame, and is injected into a roller inner cavity through a nozzle on the bearing seat, the roller inner cavity keeps about 5kg of water liquid all the time in the rotating process, and the redundant water liquid overflows from the roller inner cavity and drips on the outer surface of the roller, so that a thin layer of water curtain cooling water is formed on the surface of the roller and is recycled by a water returning pool after being filtered and returned to the water station, so that the continuous casting roller way system continuously cools the roller way in the working process, the method can cool the roller way system to a certain degree, but because the casting blank temperature of the section is still very high, the cooling water is heated to a higher temperature quickly in the moving process, even vaporized, the cooling effect on the roller way is not, the waste of water resources is caused, meanwhile, impurities in the air easily enter a water return pool along with recovered water to cause corrosion and scaling, and a large amount of chemical agents such as scale inhibitors, corrosion inhibitors, bactericides and the like need to be added, so that the method is not economical and is easy to generate secondary pollution.
Disclosure of Invention
The invention is realized by the following technical scheme.
A method of cooling a high-haul-rate continuous caster, comprising: a primary cooling procedure, wherein high-pressure water is introduced into the crystallizer cooling module through a primary high-pressure water supply module for cooling;
a secondary cooling process, wherein high-pressure water is introduced into the continuous casting roller way through a secondary high-pressure water supply module for cooling;
further, the primary cooling process comprises: and opening a primary cooling water inlet valve, introducing tap water into a water supply tank through a primary cooling water inlet pipe, opening a primary cooling high-pressure pump, pressurizing water in the water supply tank to a certain pressure, and then introducing the pressurized water into the crystallizer cooling module and the foot roller area cooling module through a primary cooling high-pressure water inlet pipe, wherein the high-pressure water sequentially enters a water cooling cavity and a spray pipe to cool the crystallizer cooling module and the foot roller area cooling module respectively.
Further, the primary cooling water recycling treatment process comprises the following steps: cooling water of the crystallizer cooling module enters a reuse water tank from a cooling water outlet pipe, and the pressure inside the reuse water tank is controlled by setting a safety pressure threshold through a pressure relief valve; meanwhile, a reuse water inlet valve is opened, and water in the reuse water tank is condensed by a condenser and then is conveyed to a water supply tank through a reuse water pipe for recycling.
Further, the secondary cooling process comprises: high-pressure water is introduced into the water inlet upper supporting pipe and the water inlet lower supporting pipe through the main water inlet pipe, sequentially enters the upper roller way left bearing seat and the lower roller way left bearing seat, and is cooled through the annular channels of the upper roller way left bearing seat and the lower roller way left bearing seat; cooling water in the annular channel sequentially enters the inner cavities of the upper roller way and the lower roller way through the upper rotating shaft water inlet channel and the lower rotating shaft water inlet channel to cool the upper roller way, the lower roller way and the steel billet; and cooling water in the inner cavities of the upper roller way and the lower roller way respectively enters the upper roller way right bearing seat and the lower roller way right bearing seat from the upper rotating shaft water outlet channel and the lower rotating shaft water outlet channel, and cools the upper roller way right bearing seat and the lower roller way right bearing seat through the annular channels of the upper roller way right bearing seat and the lower roller way right bearing seat.
Further, the secondary cooling water recycling treatment process comprises the following steps: and cooling water in the upper roller way right bearing seat and the lower roller way right bearing seat respectively flows out of the water outlet upper support pipe and the water outlet lower support pipe into the main water outlet pipe and then enters the reuse water tank through the main water outlet pipe.
Further, the cooling device of the high-pulling-speed continuous casting machine applying the method comprises a primary cooling module and a secondary cooling module, wherein the primary cooling module comprises a crystallizer cooling module and a continuous casting roller way cooling module arranged below the crystallizer module; the primary cooling module comprises a crystallizer cooling module and a foot roller area cooling module, and the foot roller area cooling module is arranged below the crystallizer cooling module through a supporting plate.
Further, the crystallizer cooling module comprises: the inner sleeve is arranged in the outer sleeve and is coaxial with the outer sleeve, the upper connecting flange is fixedly connected with the upper ends of the inner sleeve and the outer sleeve, and the lower connecting flange is fixedly connected with the lower ends of the inner sleeve and the outer sleeve; the upper end of the upper connecting flange connected with the inner sleeve and the outer sleeve is provided with a molten steel inlet, and the lower end of the lower connecting flange connected with the inner sleeve and the outer sleeve is provided with a molten steel outlet;
a cavity formed by the inner wall of the outer sleeve and the outer wall of the inner sleeve is a water cooling cavity, a cooling water inlet is formed in one side below the outer wall of the outer sleeve, a cooling water outlet is formed in the other side above the outer wall of the outer sleeve, the cooling water inlet and the cooling water outlet are communicated with the water cooling cavity, the cooling water inlet is connected with a primary cooling high-pressure water inlet pipe, and the cooling water outlet is connected with a cooling water outlet pipe;
the foot roller area cooling module comprises a foot roller device, spray pipes and nozzles, the nozzles are uniformly distributed on one side, close to the foot roller device, of the spray pipes from top to bottom, and the nozzles in the uppermost row of the spray pipes spray cooling water to a molten steel outlet of the crystallizer cooling module at a certain angle; the foot roll area cooling module comprises two rows of nozzles which are respectively arranged between a molten steel outlet and the foot roll device, and meanwhile, the annular spraying is adopted to ensure uniform cooling, and the spraying water of the nozzles and the cooling water of the crystallizer cooling module share the same water tank; cooling water of the crystallizer cooling module and the foot roller area cooling module is supplied by a primary cooling high-pressure water inlet pipe at the same time, the foot roller area cooling module sprays in an annular spraying mode, a spraying pipe is arranged on each of the front, the back, the left and the right of the foot roller device, each spraying pipe is communicated with the foot roller cooling pipe, the foot roller cooling pipe is an annular water pipe formed by connecting four water pipes end to end, and a spraying water inlet pipe connected with a water supply tank is arranged on one side of the annular water pipe;
the crystallizer cooling module also comprises a primary cooling high-pressure cooling water supply module and a primary cooling reuse water treatment module, the primary cooling high-pressure cooling water supply module is connected with a primary cooling high-pressure water inlet pipe, and the reuse water treatment module is connected with a cooling water outlet pipe; the high-pressure cooling water supply module includes: the system comprises a water supply tank, a primary cooling water inlet pipe, a primary cooling water inlet valve, a primary cooling high-pressure pump and a primary cooling pressure gauge; the primary cooling water inlet pipe is connected with a water supply tank through a primary cooling water inlet valve, the water supply tank is connected with a primary cooling high-pressure water inlet pipe through a primary cooling high-pressure pump, and a primary cooling pressure gauge is further arranged on the primary cooling high-pressure water inlet pipe; the reuse water treatment module comprises: the recycling water tank, the pressure release valve, the condenser, the recycling water pipe and the recycling water inlet valve; the cooling water outlet pipe is connected with the reuse water tank, the reuse water tank is further provided with a pressure release valve, the reuse water tank is further connected with a condenser through a pipeline, the condenser is connected with a water supply tank through a reuse water pipe, and the reuse water pipe is provided with a reuse water inlet valve.
Further, the secondary cooling module includes: the device comprises a roller way, a secondary cooling high-pressure cooling water supply module and a secondary cooling reuse water treatment module, wherein the secondary cooling high-pressure cooling water supply module, the roller way and the secondary cooling reuse water treatment module are sequentially connected with the roller way, the roller way comprises an upper roller way and a lower roller way which are symmetrically arranged up and down, and steel billets pass through the space between the upper roller way and the lower roller way; the upper roller way is connected with the upper rotating shaft, and two ends of the upper rotating shaft are respectively connected with the upper roller way left bearing seat and the upper roller way right bearing seat through bearings; the lower roller way is connected with a lower rotating shaft, and two ends of the lower rotating shaft are respectively connected with a left bearing seat of the lower roller way and a right bearing seat of the lower roller way through bearings; the upper roller way left bearing seat and the lower roller way left bearing seat are connected through a left supporting frame, and the upper roller way right bearing seat and the lower roller way right bearing seat are connected through a right supporting frame; the upper roller way and the lower roller way are of hollow structures, and the upper rotating shaft and the lower rotating shaft respectively penetrate out of the inner cavities of the upper roller way and the lower roller way; an upper rotating shaft water inlet channel is arranged at the left end of the upper rotating shaft, an upper rotating shaft water outlet hole is formed in the bottom of the upper rotating shaft water inlet channel, and the upper rotating shaft water outlet hole is communicated with an inner cavity of the upper roller channel; the right-hand member of going up the pivot sets up pivot play water passageway, the bottom of going up pivot play water passageway is provided with the upper rotating shaft inlet opening, the upper rotating shaft inlet opening link up mutually with the inside cavity of last roll table.
A lower rotating shaft water inlet channel is arranged at the left end of the lower rotating shaft, a lower rotating shaft water outlet hole is arranged at the bottom of the lower rotating shaft water inlet channel, and the lower rotating shaft water outlet hole is communicated with an inner cavity of the lower roller channel; a lower rotating shaft water outlet channel is arranged at the right end of the lower rotating shaft, a lower rotating shaft water inlet hole is arranged at the bottom of the lower rotating shaft water outlet channel, and the lower rotating shaft water inlet hole is communicated with an inner cavity of the lower roller channel; annular channels are arranged in the upper roller way left bearing block, the upper roller way right bearing block, the lower roller way left bearing block and the lower roller way right bearing block; an annular channel in the left bearing seat of the upper roller way is communicated with an upper water inlet branch pipe and an upper rotating shaft water inlet channel; an annular channel in the right bearing seat of the upper roller way is communicated with the upper water outlet branch pipe and the upper rotating shaft water outlet channel; the annular channel in the left bearing seat of the lower roller way is communicated with the underwater inlet branch pipe and the lower rotating shaft water inlet channel, and the annular channel in the right bearing seat of the lower roller way is communicated with the underwater outlet branch pipe and the lower rotating shaft water outlet channel; the secondary cooling high-pressure cooling water supply module comprises: a secondary cooling water inlet pipe, a secondary cooling water inlet valve, a secondary cooling ultrahigh pressure pressurizer and a secondary cooling pressure gauge; the secondary cooling water inlet pipe is connected with a water supply tank through a secondary cooling water inlet valve, the water supply tank is connected with the main water inlet pipe through a secondary cooling ultrahigh pressure pressurizer, and the secondary cooling water inlet pipe is also provided with a secondary cooling water inlet valve and a secondary cooling pressure gauge; and a main water outlet pipe in the secondary cooling reuse water treatment module is connected with a reuse water tank in the primary cooling module.
Furthermore, high-pressure water pressure is introduced into the primary cooling process and the secondary cooling process and is 3-600 Mpa, a cooling water outlet pipe, a primary cooling high-pressure water inlet pipe and a spray pipe in the primary cooling process, and an upper water inlet branch pipe, an upper water outlet branch pipe, an underwater water inlet branch pipe, an underwater water outlet branch pipe, a main water inlet pipe and a main water outlet pipe in the secondary cooling process all adopt ultrahigh-pressure pipelines with the pressure bearing range within 600 Mpa.
Compared with the prior art, the invention has the beneficial effects that:
1. the primary cooling process is realized by continuously feeding cold water into the cooling layer of the crystallizer, high-pressure cooling water is provided for the cooling module of the crystallizer and the cooling module of the foot roll area through the high-pressure water inlet pipe, so that the water flows in the crystallizer quickly, and high-pressure water is sprayed by the nozzle of the cooling module of the foot roll area to cool a casting blank, so that the cooling efficiency and the cooling effect are improved.
2. According to the invention, hot water flowing out of the cooling water outlet pipe is condensed by the condenser and then enters the water supply tank through the condensate water recycling pipe to be used as circulating water for recycling, so that the amount of water required by cooling is greatly reduced, and the waste of water resources is reduced.
3. According to the invention, high-pressure water of 3-600 MPa is introduced into each part on the roller way for cooling, and because the water pressure is high and the water flow velocity is high, the temperature of the roller way and the surface of the billet can be taken away quickly, the cooling effect is good, the roller way system is less influenced by high temperature, and the quality of the billet is stable.
4. The cooling water provided by the invention has high pressure, the movement speed block of the cooling water quickly takes away heat in the movement process, the influence on the cooling effect of a roller way caused by heating the water to a higher temperature and even vaporization is avoided, the waste of water resources caused by the loss of the cooling water due to vaporization is avoided, and meanwhile, the cooling water circulates through a pipeline, so that the corrosion, scaling and secondary pollution caused by the fact that impurities in the air enter a water tank are avoided.
Drawings
FIG. 1 is a structural view of a primary cooling module in a cooling method of a high-casting-speed continuous casting machine according to the present invention;
FIG. 2 is a top view of FIG. 1;
FIG. 3 is a structural view of embodiment 1 of a secondary cooling module in the cooling method of a high-casting-speed continuous casting machine according to the present invention;
FIG. 4 is a structural diagram of a primary cooling water recycling treatment module and a secondary cooling water recycling treatment module in the cooling method of the high-casting-speed continuous casting machine according to the present invention;
FIG. 5 is a structural view of embodiment 2 of a secondary cooling module in the cooling method of a high-casting-speed continuous casting machine according to the present invention;
FIG. 6 is a process flow diagram of a cooling method for a high casting speed caster in accordance with the present invention;
in the figure: 1. a crystallizer cooling module; 101. an inner sleeve; 102. a jacket; 103. molten steel; 104. a molten steel inlet; 105. an upper connecting flange; 106. a cooling water inlet; 107. a cooling water outlet; 108. a molten steel outlet; 109. a lower connecting flange; 110. a cooling water outlet pipe; 111. cooling the high-pressure water inlet pipe for the first time; 112. a primary cooling water inlet pipe; 113. a primary cooling water inlet valve; 114. primary cooling of the high-pressure pump; 115. the pressure gauge is cooled for the first time; 116. a water supply tank; 117. a pressure relief valve; 118. a recycling water tank; 119. a condenser; 120. recycling the water pipe; 121. a recycled water inlet valve; 2. a foot roll zone cooling module; 201. a foot roller device; 202. a shower pipe; 203. a nozzle; 204. a foot roll cooling tube; 205. a spray water inlet pipe; 3. a support plate; 301. a fixing hole; 4. feeding the roller bed; 5. a roller way is arranged; 6. an upper rotating shaft; 601. an upper rotating shaft water inlet channel; 602. water outlet holes of the upper rotating shaft; 603. an upper rotating shaft water outlet channel; 604. an upper rotating shaft water inlet; 605. a lower rotating shaft water inlet channel; 606. a lower rotating shaft water outlet channel; 607. water outlet holes of the lower rotating shaft; 608. a lower rotating shaft water inlet hole; 7. a lower rotating shaft; 8. a bearing; 9. a left bearing seat of an upper roller way; 10. a right bearing seat of the upper roller way; 11. a left bearing seat of the lower roller bed; 12. a right bearing seat of the lower roller bed; 13. a left support frame; 14. a right support frame; 15. a steel billet; 16. an intake upper branch pipe; 17. an overwater branch pipe; 18. an underwater inlet branch pipe; 19. discharging the underwater branch pipe; 20. a main water inlet pipe; 21. a main water outlet pipe; 23. a secondary cooling water inlet pipe; 24. a secondary cooling water inlet valve; 25. secondary cooling of the ultrahigh pressure pressurizer; 26. cooling the pressure gauge for the second time; 27. a first high-pressure pipe joint; 28. a second high-pressure pipe joint; 34. a main water inlet; 35. a main water outlet; 36. a left support base cooling channel; 37. and a cooling channel of the right support seat.
Detailed Description
The technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is to be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without any inventive step, are within the scope of the present invention.
The present invention will be described in further detail below with reference to specific embodiments and with reference to the attached drawings.
Example 1
Referring to fig. 6, a cooling method of a high-drawing-speed continuous casting machine includes: a primary cooling procedure, wherein high-pressure water is introduced into the crystallizer cooling module through a primary high-pressure water supply module for cooling; a secondary cooling process, wherein high-pressure water is introduced into the continuous casting roller way through a secondary high-pressure water supply module for cooling; and treating the cooling water after primary cooling and the cooling water after secondary cooling to be used as reuse water.
Referring to fig. 1 and 4, the primary cooling process includes: the primary cooling water inlet valve 113 is opened, tap water is introduced into the water supply tank 116 through the primary cooling water inlet pipe 112, the primary cooling high-pressure pump 114 is opened, water in the water supply tank 116 is pressurized to a certain pressure and then is respectively introduced into the crystallizer cooling module 1 and the foot roll area cooling module 2 through the primary cooling high-pressure water inlet pipe 111, and high-pressure water sequentially enters the water cooling cavity and the spray pipe 202 to respectively cool the crystallizer cooling module 1 and the foot roll area cooling module 2.
Referring to fig. 4, the primary cooling water reuse treatment process includes: cooling water of the crystallizer cooling module enters the reuse water tank 118 from the cooling water outlet pipe 110, because the water pressure and the temperature of the water flowing out of the cooling water outlet pipe 110 are high, in order to avoid overlarge pressure intensity inside the reuse water tank 118, a pressure relief valve 117 is arranged on the reuse water tank 118, and the pressure inside the reuse water tank 118 is controlled by setting a safety pressure threshold value through the pressure relief valve 117; meanwhile, a reuse water inlet valve 121 is opened, and water in the reuse water tank 118 is condensed by a condenser 119 and then is conveyed to the water supply tank 116 through a reuse water pipe 120 for recycling.
Referring to fig. 3, the secondary cooling process includes: high-pressure water is introduced into the water inlet upper support pipe 16 and the water inlet lower support pipe 18 through the main water inlet pipe 20, the high-pressure water sequentially enters the upper roller way left bearing seat 9 and the lower roller way left bearing seat 11, and the upper roller way left bearing seat 9 and the lower roller way left bearing seat 11 are cooled through annular channels of the upper roller way left bearing seat 9 and the lower roller way left bearing seat 11; cooling water in the annular channel sequentially enters the inner cavities of the upper roller way 4 and the lower roller way 5 through the upper rotating shaft water inlet channel 601 and the lower rotating shaft water inlet channel 605 to cool the upper roller way 4, the lower roller way 5 and the steel billet 15; and cooling water in the inner cavities of the upper roller way 4 and the lower roller way 5 respectively enters the upper roller way right bearing seat 10 and the lower roller way right bearing seat 12 from the upper rotating shaft water outlet channel 603 and the lower rotating shaft water outlet channel 606, and cools the upper roller way right bearing seat 10 and the lower roller way right bearing seat 12 through the annular channels of the upper roller way right bearing seat 10 and the lower roller way right bearing seat 12.
Referring to fig. 3 and 4, the secondary cooling water reuse treatment process includes: and the cooling water in the upper roller way right bearing seat 10 and the lower roller way right bearing seat 12 respectively flows out of the water outlet upper support pipe 17 and the water outlet lower support pipe 19 to enter the main water outlet pipe 21, and then enters the reuse water tank 118 through the main water outlet pipe 21.
Referring to fig. 1, the cooling device of the high-casting-speed continuous casting machine applying the method comprises a primary cooling module and a secondary cooling module, wherein the secondary cooling module comprises a crystallizer cooling module and a continuous casting roller way cooling module arranged below the crystallizer module; the primary cooling module comprises a crystallizer cooling module 1 and a foot roller area cooling module 2, and the foot roller area cooling module 2 is arranged below the crystallizer cooling module 1 through a supporting plate 3.
With reference to fig. 1, the crystallizer cooling module 1 comprises: the connecting structure comprises an inner sleeve 101, an outer sleeve 102, an upper connecting flange 105 and a lower connecting flange 109, wherein the inner sleeve 101 is arranged in the outer sleeve 102 and is coaxial with the outer sleeve 102, the upper connecting flange 105 is fixedly connected with the upper ends of the inner sleeve 101 and the outer sleeve 102, and the lower connecting flange 109 is fixedly connected with the lower ends of the inner sleeve 101 and the outer sleeve 102; the upper end of the upper connecting flange 105 connected with the inner sleeve 101 and the outer sleeve 102 is provided with a molten steel inlet 104, and the lower end of the lower connecting flange 109 connected with the inner sleeve 101 and the outer sleeve 102 is provided with a molten steel outlet 108.
Referring to fig. 1, a cavity formed by the inner wall of the outer sleeve 102 and the outer wall of the inner sleeve 101 is a water cooling cavity, a cooling water inlet 106 is arranged on one side below the outer wall of the outer sleeve 102, a cooling water outlet 107 is arranged on the other side above the outer wall of the outer sleeve 102, the cooling water inlet 106 and the cooling water outlet 107 are communicated with the water cooling cavity, the cooling water inlet 106 is connected with a primary cooling high-pressure water inlet pipe 111, and the cooling water outlet 107 is connected with a cooling water outlet pipe 110.
Referring to fig. 1 and 2, the foot roll area cooling module 2 comprises a foot roll device 201, a spray pipe 202 and spray nozzles 203, wherein the spray nozzles 203 are uniformly distributed on the spray pipe 202 from top to bottom on one side close to the foot roll device 201, and the spray nozzles 203 on the uppermost row of the spray pipe 202 spray cooling water to a molten steel outlet 108 of the mold cooling module 1 at a certain angle; the foot roll area cooling module 2 comprises two rows of nozzles 203 which are respectively arranged between the molten steel outlet 108 and the foot roll device 201, and meanwhile, annular spraying is adopted to ensure uniform cooling, and spray water of the nozzles 203 and cooling water of the crystallizer cooling module 1 share the same water tank; the cooling water of the crystallizer cooling module 1 and the cooling water of the foot roll area cooling module 2 are provided by a primary cooling high-pressure water inlet pipe 111, the foot roll area cooling module 2 sprays by adopting an annular spraying mode, four spraying pipes 202 are respectively arranged on the front, the back, the left and the right of the foot roll device 201, each spraying pipe 202 is respectively communicated with a foot roll cooling pipe 204, the foot roll cooling pipe 204 is an annular water pipe formed by connecting four water pipes end to end, and a spraying water inlet pipe 205 connected with a water supply tank 116 is arranged on one side of the annular water pipe.
Referring to fig. 1 and 4, the crystallizer cooling module 1 further includes a primary cooling high-pressure cooling water supply module and a primary cooling reuse water treatment module, the primary cooling high-pressure cooling water supply module is connected to a primary cooling high-pressure water inlet pipe 111, and the reuse water treatment module is connected to a cooling water outlet pipe 110; the high-pressure cooling water supply module includes: a water supply tank 116, a primary cooling water inlet pipe 112, a primary cooling water inlet valve 113, a primary cooling high-pressure pump 114, and a primary cooling pressure gauge 115; the primary cooling water inlet pipe 112 is connected with a water supply tank 116 through a primary cooling water inlet valve 113, the water supply tank 116 is connected with a primary cooling high-pressure water inlet pipe 111 through a primary cooling high-pressure pump 114, and a primary cooling pressure gauge 115 is further arranged on the primary cooling high-pressure water inlet pipe 111; the reuse water treatment module comprises: a reuse water tank 118, a pressure relief valve 117, a condenser 119, a reuse water pipe 120, and a reuse water inlet valve 121; cooling water outlet pipe 110 is connected with retrieval and utilization water tank 118, still install relief valve 117 on the retrieval and utilization water tank 118, retrieval and utilization water tank 118 still is connected with condenser 119 through the pipeline, condenser 119 is connected with feed tank 116 through retrieval and utilization water pipe 120, be provided with reuse water inlet valve 121 on the retrieval and utilization water pipe 120.
Referring to fig. 3, the secondary cooling module includes: the device comprises a roller way, a secondary cooling high-pressure cooling water supply module and a secondary cooling reuse water treatment module, wherein the secondary cooling high-pressure cooling water supply module, the roller way and the secondary cooling reuse water treatment module are sequentially connected with the roller way, the roller way comprises an upper roller way 4 and a lower roller way 5 which are symmetrically arranged up and down, and a steel billet 15 passes through the space between the upper roller way 4 and the lower roller way 5; the upper roller table 4 is connected with an upper rotating shaft 6, and two ends of the upper rotating shaft 6 are respectively connected with an upper roller table left bearing seat 9 and an upper roller table right bearing seat 10 through bearings 8; the lower roller table 5 is connected with a lower rotating shaft 7, and two ends of the lower rotating shaft 7 are respectively connected with a lower roller table left bearing block 11 and a lower roller table right bearing block 12 through bearings 8; the upper roller way left bearing seat 9 and the lower roller way left bearing seat 11 are connected through a left support frame 13, and the upper roller way right bearing seat 10 and the lower roller way right bearing seat 12 are connected through a right support frame 14; the upper roller way 4 and the lower roller way 5 are of hollow structures, and the upper rotating shaft 6 and the lower rotating shaft 7 respectively penetrate out of the inner cavities of the upper roller way 4 and the lower roller way 5; an upper rotating shaft water inlet channel 601 is arranged at the left end of the upper rotating shaft 6, an upper rotating shaft water outlet hole 602 is arranged at the bottom of the upper rotating shaft water inlet channel 601, and the upper rotating shaft water outlet hole 602 is communicated with an inner cavity of the upper roller channel 4; an upper rotating shaft water outlet channel 603 is arranged at the right end of the upper rotating shaft 6, an upper rotating shaft water inlet hole 604 is arranged at the bottom of the upper rotating shaft water outlet channel 603, and the upper rotating shaft water inlet hole 604 is communicated with the inner cavity of the upper roller channel 4.
Meanwhile, the left end of the lower rotating shaft 7 is provided with a lower rotating shaft water inlet channel 605, the bottom of the lower rotating shaft water inlet channel 605 is provided with a lower rotating shaft water outlet 607, and the lower rotating shaft water outlet 607 is communicated with the inner cavity of the lower roller channel 5; a lower rotating shaft water outlet channel 606 is arranged at the right end of the lower rotating shaft 7, a lower rotating shaft water inlet hole 608 is arranged at the bottom of the lower rotating shaft water outlet channel 606, and the lower rotating shaft water inlet hole 608 is communicated with an inner cavity of the lower roller channel 5; annular channels are arranged inside the upper roller way left bearing block 9, the upper roller way right bearing block 10, the lower roller way left bearing block 11 and the lower roller way right bearing block 12; the annular channel in the left bearing seat 9 of the upper roller way is communicated with the water inlet upper support pipe 16 and the water inlet channel 601 of the upper rotating shaft; an annular channel in the upper roller way right bearing seat 10 is communicated with the water outlet upper support pipe 17 and the upper rotating shaft water outlet channel 603; the annular channel in the lower roller way left bearing seat 11 is communicated with a water inlet lower support pipe 18 and a lower rotating shaft water inlet channel 605, and the annular channel in the lower roller way right bearing seat 12 is communicated with a water outlet lower support pipe 19 and a lower rotating shaft water outlet channel 606; the secondary cooling high-pressure cooling water supply module comprises: a secondary cooling water inlet pipe 23, a secondary cooling water inlet valve 24, a secondary cooling ultrahigh pressure pressurizer 25 and a secondary cooling pressure gauge 26; the secondary cooling water inlet pipe 23 is connected with a water supply tank 116 through a secondary cooling water inlet valve 24, the water supply tank 116 is connected with a main water inlet pipe 20 through a secondary cooling ultrahigh pressure pressurizer 25, and the secondary cooling water inlet pipe 23 is also provided with a secondary cooling water inlet valve 24 and a secondary cooling pressure gauge 26; and a main water outlet pipe 21 in the secondary cooling reuse water treatment module is connected with a reuse water tank 118 in the primary cooling module.
Further, high-pressure water pressure is introduced into the primary cooling process and the secondary cooling process and is 3-600 Mpa, the cooling water outlet pipe 110, the primary cooling high-pressure water inlet pipe 111 and the spray pipe 202 in the primary cooling process, and the water inlet upper branch pipe 16, the water outlet upper branch pipe 17, the water inlet lower branch pipe 18, the water outlet lower branch pipe 19, the main water inlet pipe 20 and the main water outlet pipe 21 in the secondary cooling process all adopt ultrahigh-pressure pipelines with the pressure bearing range within 600 Mpa.
Example 2
As shown in fig. 5, the present embodiment is similar to the structure principle of embodiment 1, and differs from embodiment 1 in that the present embodiment has the main water inlet pipe 20, the main water outlet pipe 21, the upper water inlet pipe 16, the upper water outlet pipe 17, the lower water inlet pipe 18, and the lower water outlet pipe 19 removed, and has the main water inlet 34, the main water outlet 35, the left support seat cooling channel 36, and the right support seat cooling channel 37 added in the left support frame 13 and the right support frame 14; the main water inlet 34 and the main water outlet 35 are respectively communicated with the left support seat cooling channel 36 and the right support seat cooling channel 37; two ends of the left support seat cooling channel 36 are respectively communicated with annular water channels in the upper roller way left bearing seat 9 and the lower roller way left bearing seat 11, and two ends of the right support seat cooling channel 37 are respectively communicated with annular water channels in the upper roller way right bearing seat 10 and the lower roller way right bearing seat 12; high pressure water passes through main water inlet 34 entering roll table, and the water after the cooling flows out by main delivery port 35, because the supporting seat plays important supporting role at whole roll table, and it receives high temperature shadow also can influence the billet quality, has consequently newly increased left supporting seat cooling channel 36 and right supporting seat cooling channel 37 in this embodiment, can fully cool off two supporting seats, makes the cooling of whole roll table more abundant.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions deviate from the technical solutions of the embodiments of the present invention.
Claims (4)
1. A method of cooling a high-haul-rate continuous caster, comprising: a primary cooling procedure, wherein high-pressure water is introduced into the crystallizer cooling module through a primary high-pressure water supply module to cool the crystallizer;
a secondary cooling procedure, wherein high-pressure water is introduced into the continuous casting roller way through a secondary high-pressure water supply module to cool the continuous casting roller way;
the primary cooling process comprises the following steps: opening a primary cooling water inlet valve (113), introducing tap water into a water supply tank (116) through a primary cooling water inlet pipe (112), opening a primary cooling high-pressure pump (114), pressurizing water in the water supply tank (116) to a certain pressure, and then respectively introducing the pressurized water into a crystallizer cooling module (1) and a foot roll area cooling module (2) through a primary cooling high-pressure water inlet pipe (111), wherein high-pressure water sequentially enters a water cooling cavity and a spray pipe (202) to respectively cool the crystallizer cooling module (1) and the foot roll area cooling module (2);
the secondary cooling process comprises the following steps: high-pressure water is introduced into the water inlet upper branch pipe (16) and the water inlet lower branch pipe (18) through the main water inlet pipe (20), the high-pressure water sequentially enters the upper roller way left bearing seat (9) and the lower roller way left bearing seat (11), and the upper roller way left bearing seat (9) and the lower roller way left bearing seat (11) are cooled through annular channels of the upper roller way left bearing seat (9) and the lower roller way left bearing seat (11); cooling water in the annular channel sequentially passes through the upper rotating shaft water inlet channel (601) and the lower rotating shaft water inlet channel (605) and respectively enters the inner cavities of the upper roller way (4) and the lower roller way (5) to cool the upper roller way (4), the lower roller way (5) and the steel billet (15); cooling water in the inner cavities of the upper roller way (4) and the lower roller way (5) respectively enters the upper roller way right bearing seat (10) and the lower roller way right bearing seat (12) from the upper rotating shaft water outlet channel (603) and the lower rotating shaft water outlet channel (606), and the upper roller way right bearing seat (10) and the lower roller way right bearing seat (12) are cooled through the annular channels of the upper roller way right bearing seat (10) and the lower roller way right bearing seat (12);
the cooling device of the high-drawing-speed continuous casting machine applying the cooling method is characterized by comprising a primary cooling module and a secondary cooling module, wherein the secondary cooling module comprises a continuous casting roller way cooling module arranged below a crystallizer module; the primary cooling module comprises a crystallizer cooling module (1) and a foot roller area cooling module (2), and the foot roller area cooling module (2) is arranged below the crystallizer cooling module (1) through a supporting plate (3); the crystallizer cooling module (1) comprises: the connecting structure comprises an inner sleeve (101), an outer sleeve (102), an upper connecting flange (105) and a lower connecting flange (109), wherein the inner sleeve (101) is arranged in the outer sleeve (102) and is coaxial with the outer sleeve (102), the upper connecting flange (105) is fixedly connected with the upper ends of the inner sleeve (101) and the outer sleeve (102), and the lower connecting flange (109) is fixedly connected with the lower ends of the inner sleeve (101) and the outer sleeve (102); the upper end of the upper connecting flange (105) connected with the inner sleeve (101) and the outer sleeve (102) is provided with a molten steel inlet (104), and the lower end of the lower connecting flange (109) connected with the inner sleeve (101) and the outer sleeve (102) is provided with a molten steel outlet (108);
a cavity formed by the inner wall of the outer sleeve (102) and the outer wall of the inner sleeve (101) is a water cooling cavity, a cooling water inlet (106) is formed in one side below the outer wall of the outer sleeve (102), a cooling water outlet (107) is formed in the other side above the outer wall of the outer sleeve (102), the cooling water inlet (106) and the cooling water outlet (107) are communicated with the water cooling cavity, the cooling water inlet (106) is connected with a primary cooling high-pressure water inlet pipe (111), and the cooling water outlet (107) is connected with a cooling water outlet pipe (110);
the foot roller area cooling module (2) comprises a foot roller device (201), spray pipes (202) and nozzles (203), wherein the nozzles (203) are uniformly distributed on one side, close to the foot roller device (201), of the spray pipes (202) from top to bottom, and the nozzles (203) on the uppermost row of the spray pipes (202) spray cooling water to a molten steel outlet (108) of the crystallizer cooling module (1) at a certain angle; the foot roll area cooling module (2) comprises two rows of nozzles (203) which are respectively arranged between a molten steel outlet (108) and a foot roll device (201), meanwhile, annular spraying is adopted to ensure uniform cooling, and spray water of the nozzles (203) and cooling water of the crystallizer cooling module (1) share the same water tank; the cooling water of the crystallizer cooling module (1) and the cooling water of the foot roll area cooling module (2) are simultaneously provided by a primary cooling high-pressure water inlet pipe (111), the foot roll area cooling module (2) sprays in an annular spraying mode, a spraying pipe (202) is respectively arranged on the front, the back, the left and the right of the foot roll device (201), each spraying pipe (202) is respectively communicated with a foot roll cooling pipe (204), the foot roll cooling pipe (204) is an annular water pipe formed by connecting four water pipes end to end, and a spraying water inlet pipe (205) connected with a water supply tank (116) is arranged on one side of the annular water pipe.
2. The cooling method of the high-pulling-speed continuous casting machine according to claim 1, characterized in that the crystallizer cooling module (1) further comprises a primary cooling high-pressure cooling water supply module and a primary cooling reuse water treatment module, wherein the primary cooling high-pressure cooling water supply module is connected with a primary cooling high-pressure water inlet pipe (111), and the reuse water treatment module is connected with a cooling water outlet pipe (110); the high-pressure cooling water supply module includes: a water supply tank (116), a primary cooling water inlet pipe (112), a primary cooling water inlet valve (113), a primary cooling high-pressure pump (114) and a primary cooling pressure gauge (115); the primary cooling water inlet pipe (112) is connected with a water supply tank (116) through a primary cooling water inlet valve (113), the water supply tank (116) is connected with a primary cooling high-pressure water inlet pipe (111) through a primary cooling high-pressure pump (114), and a primary cooling pressure gauge (115) is further arranged on the primary cooling high-pressure water inlet pipe (111); the reuse water treatment module comprises: a reuse water tank (118), a pressure release valve (117), a condenser (119), a reuse water pipe (120) and a reuse water inlet valve (121); cooling water outlet pipe (110) is connected with retrieval and utilization water tank (118), still install relief valve (117) on retrieval and utilization water tank (118), retrieval and utilization water tank (118) are still connected through pipeline and condenser (119), condenser (119) are connected with supply tank (116) through retrieval and utilization water pipe (120), be provided with reuse water intaking valve (121) on retrieval and utilization water pipe (120).
3. The method of claim 2, wherein the secondary cooling module comprises: the device comprises a roller way, a secondary cooling high-pressure cooling water supply module and a secondary cooling reuse water treatment module, wherein the secondary cooling high-pressure cooling water supply module, the roller way and the secondary cooling reuse water treatment module are sequentially connected with the roller way, the roller way comprises an upper roller way (4) and a lower roller way (5) which are vertically and symmetrically arranged, and a steel billet (15) passes through the space between the upper roller way (4) and the lower roller way (5); the upper roller way (4) is connected with an upper rotating shaft (6), and two ends of the upper rotating shaft (6) are respectively connected with an upper roller way left bearing seat (9) and an upper roller way right bearing seat (10) through bearings (8); the lower roller way (5) is connected with a lower rotating shaft (7), and two ends of the lower rotating shaft (7) are respectively connected with a lower roller way left bearing block (11) and a lower roller way right bearing block (12) through bearings (8); the upper roller way left bearing seat (9) and the lower roller way left bearing seat (11) are connected through a left supporting frame (13), and the upper roller way right bearing seat (10) and the lower roller way right bearing seat (12) are connected through a right supporting frame (14); the upper roller way (4) and the lower roller way (5) are of hollow structures, and the upper rotating shaft (6) and the lower rotating shaft (7) respectively penetrate out of the inner cavities of the upper roller way (4) and the lower roller way (5); an upper rotating shaft water inlet channel (601) is arranged at the left end of the upper rotating shaft (6), an upper rotating shaft water outlet hole (602) is formed in the bottom of the upper rotating shaft water inlet channel (601), and the upper rotating shaft water outlet hole (602) is communicated with an inner cavity of the upper roller table (4); an upper rotating shaft water outlet channel (603) is arranged at the right end of the upper rotating shaft (6), an upper rotating shaft water inlet hole (604) is formed in the bottom of the upper rotating shaft water outlet channel (603), and the upper rotating shaft water inlet hole (604) is communicated with an inner cavity of the upper roller way (4); a lower rotating shaft water inlet channel (605) is arranged at the left end of the lower rotating shaft (7), a lower rotating shaft water outlet hole (607) is arranged at the bottom of the lower rotating shaft water inlet channel (605), and the lower rotating shaft water outlet hole (607) is communicated with an inner cavity of the lower roller way (5); the right end of the lower rotating shaft (7) is provided with a lower rotating shaft water outlet channel (606), the bottom of the lower rotating shaft water outlet channel (606) is provided with a lower rotating shaft water inlet hole (608), and the lower rotating shaft water inlet hole (608) is communicated with an inner cavity of the lower rotating shaft (5).
4. The cooling method of the high-pulling-speed continuous casting machine according to claim 3, characterized in that the inside of the upper roller way left bearing block (9), the upper roller way right bearing block (10), the lower roller way left bearing block (11) and the lower roller way right bearing block (12) are all provided with an annular channel; an annular channel in the left bearing seat (9) of the upper roller way is communicated with an upper water inlet branch pipe (16) and an upper rotating shaft water inlet channel (601); an annular channel in the right bearing seat (10) of the upper roller way is communicated with the water outlet upper support pipe (17) and the upper rotating shaft water outlet channel (603); an annular channel in the lower roller way left bearing seat (11) is communicated with an underwater branch pipe (18) and a lower rotating shaft water inlet channel (605), and an annular channel in the lower roller way right bearing seat (12) is communicated with an underwater branch pipe (19) and a lower rotating shaft water outlet channel (606); the secondary cooling high-pressure cooling water supply module comprises: a secondary cooling water inlet pipe (23), a secondary cooling water inlet valve (24), a secondary cooling ultrahigh pressure pressurizer (25) and a secondary cooling pressure gauge (26); the secondary cooling water inlet pipe (23) is connected with a water supply tank (116) through a secondary cooling water inlet valve (24), the water supply tank (116) is connected with the main water inlet pipe (20) through a secondary cooling ultrahigh pressure pressurizer (25), and the secondary cooling water inlet pipe (23) is also provided with a secondary cooling water inlet valve (24) and a secondary cooling pressure gauge (26); and a main water outlet pipe (21) in the secondary cooling reuse water treatment module is connected with a reuse water tank (118) in the primary cooling module.
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| CN115401179B (en) * | 2022-08-23 | 2023-12-26 | 北京首钢股份有限公司 | Control method of cooling water for short side of continuous casting billet crystallizer |
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| CN2124093U (en) * | 1992-05-25 | 1992-12-09 | 冶金工业部北京冶金设备研究所 | Spray cooling tube type continuous casting crystallizer |
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