CN110153390B - Steel index control method for deepening steel passing amount of steel-making crystallizer - Google Patents
Steel index control method for deepening steel passing amount of steel-making crystallizer Download PDFInfo
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- CN110153390B CN110153390B CN201910495264.1A CN201910495264A CN110153390B CN 110153390 B CN110153390 B CN 110153390B CN 201910495264 A CN201910495264 A CN 201910495264A CN 110153390 B CN110153390 B CN 110153390B
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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
- B22D11/08—Accessories for starting the casting procedure
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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
- B22D11/16—Controlling or regulating processes or operations
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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
- B22D11/16—Controlling or regulating processes or operations
- B22D11/22—Controlling or regulating processes or operations for cooling cast stock or mould
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Abstract
The invention relates to the technical field of crystallizers, and discloses a steel index control method for deepening steel passing amount of a steel-making crystallizer, which comprises the following steps of: the control technology and equipment for the PH value index and the conductivity index of the cold water quality comprise a water tower and a monitoring terminal, wherein a water quality monitor is arranged in the water tower and is in direct contact with cold water in the water tower for real-time monitoring; the cold water quality PH value index control method is characterized in that a water quality monitor monitors the cold water quality PH value in real time. The steel index control method for deepening the steel passing amount of the steelmaking crystallizer has the advantages of ensuring the heat transfer efficiency, reducing abnormal abrasion of a copper pipe coating and the like, solves the problem that the steel passing amount of the continuous casting crystallizer determines the service life of a copper pipe, improves the steel passing amount of the copper pipe, can reduce the production cost, simultaneously reduces the replacement frequency of the crystallizer, increases the overhaul and maintenance time of ladle changing equipment, reduces the labor intensity of personnel, maximally improves the yield of a steel plant, stabilizes the steelmaking production organization, and still has the problem of space improvement.
Description
Technical Field
The invention relates to the technical field of crystallizers, in particular to a steel index control method for deepening steel passing amount of a steelmaking crystallizer.
Background
The continuous casting crystallizer is used as the heart of a continuous casting machine, is important equipment for ensuring the continuous casting production to be smooth and the quality of casting blanks to be stable, and along with the development and the progress of the technology, the service life of a copper pipe of the crystallizer is prolonged, and the consumption of the copper pipe can be effectively reduced, so that the improvement research on the steel passing amount of the copper pipe of the crystallizer has important significance for stable production and quality, cost reduction and yield improvement of a steel plant.
Chinese patent CN201310104332.X discloses an online operation judgment system for a continuous casting machine crystallizer, which is used for online judging whether the continuous casting machine crystallizer is in an optimal operation state or not so as to ensure the surface quality of a continuous casting billet, the steel passing amount of the current continuous casting crystallizer determines the service life of a copper pipe, the steel passing amount of the copper pipe is increased, the production cost is reduced, the replacement frequency of the crystallizer is reduced, the overhaul and maintenance time of ladle changing equipment is increased, the labor intensity of personnel is reduced, the yield of a steel plant is increased to the maximum extent, a steel production organization is stabilized, and an improvement space is still provided, so that the steel passing amount deepening steel index control method for the steel making crystallizer is provided.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a steel index control method for deepening the steel passing amount of a steel-making crystallizer, which has the advantages of ensuring the heat transfer efficiency, reducing the abnormal abrasion of a copper pipe coating and the like, solves the problem that the steel passing amount of a continuous casting crystallizer determines the service life of a copper pipe, improves the steel passing amount of the copper pipe, reduces the production cost, reduces the replacement frequency of the crystallizer, increases the overhaul and maintenance time of ladle changing equipment, reduces the labor intensity of personnel, improves the yield of a steel plant to the maximum, stabilizes the steel-making production organization and still has the problem of space improvement.
(II) technical scheme
In order to achieve the purposes of ensuring the heat transfer efficiency and reducing abnormal abrasion of the copper pipe coating, the invention provides the following technical scheme: the steel index control method for deepening the steel passing amount of the steel-making crystallizer comprises the following steps of:
1) the control technology and equipment for the PH value index and the conductivity index of the cold water quality comprise a water tower and a monitoring terminal, wherein a water quality monitor is arranged in the water tower and is in direct contact with cold water in the water tower for real-time monitoring;
2) the cold water quality PH value index control method is characterized in that a water quality monitor monitors the PH value of cold water in real time, an input pipe extending to the cold water is arranged in a water tower, and the PH value is adjusted by adding a proper amount of corrosion inhibitor into the input pipe;
3) the method for controlling the conductivity index of the cold water quality comprises the steps that a conductivity controller is arranged inside a water tower, a water quality monitor monitors the conductivity of the cold water quality in real time, the water quality monitor transmits cold water information to a monitoring terminal, the conductivity controller is controlled through the monitoring terminal, and the conductivity of the cold water is adjusted;
4) the moving track of the dummy bar is controlled, a bearing is movably arranged on the outer side of the dummy bar, a limiting ring in contact with the bearing is sleeved on the outer side of the dummy bar and moves horizontally along with the braking device of the dummy bar, and the dummy bar is limited by the limiting ring in the moving process of the dummy bar depending on a motor, so that the moving deviation of the dummy bar can be reduced;
5) the copper pipe plating layer and the taper of the crystallizer are optimized, the copper pipe lining plating layer is added, the copper pipe parameters are optimized, and the copper pipe blank drawing resistance is controlled on the premise of increasing the wear resistance of the copper pipe.
Preferably, the water tower in the step 1 is a closed cooling tower for a crystallizer, and the monitoring terminal is controlled and supervised by a worker.
Preferably, the application range of the corrosion inhibitor in the step 2 is wide; the pH value range of chromate is 6.5-9.0, the pH value range of polyphosphate is 6.0-7.0, the pH value range of chromate-zinc salt is 6.5-7.5, the pH value range of molybdate is 7.5-10.0, the pH value range of silicate is 7.5-10.0, and the pH value range of cold water quality index is 7.0-9.0.
Preferably, the conductivity controller in step 3 adopts a singlechip to digitally calculate temperature compensation, has the functions of high and low limit control relay output and switching temperature display, and is suitable for pure water manufacturing and cooling water towers.
Preferably, the dummy bar in the step 4 rolls between the bearing and the limiting ring in the moving process, so that the friction between the limiting ring and the dummy bar is reduced, the abrasion of the dummy bar is reduced, the deviation caused by the change of the size of the dummy bar due to the abrasion is prevented, and the moving error of the dummy bar is ensured to be within 5 mm.
(III) advantageous effects
Compared with the prior art, the invention provides a steel index control method for deepening steel passing amount of a steel-making crystallizer, which has the following beneficial effects:
1. the steel-making crystallizer steel-passing quantity deepening steel index control method comprises a water tower and a monitoring terminal, wherein a water quality monitor is arranged inside the water tower and is in direct contact with cold water in the water tower and monitors the cold water in real time, a cold water quality pH index control method is adopted, the water quality monitor monitors the cold water pH value in real time, an input pipe extending to cold water is arranged in the water tower, the pH value is adjusted by adding a proper amount of corrosion inhibitor into the input pipe, a conductivity index control method of cold water quality is adopted, a conductivity controller is arranged inside the water tower, the water quality monitor monitors the conductivity of the cold water quality in real time, the water quality monitor transmits cold water information to the monitoring terminal, the control terminal controls the conductivity controller to adjust the conductivity of the cold water, the application range of the corrosion inhibitor; the pH value of chromate is 6.5-9.0, the pH value of polyphosphate is 6.0-7.0, the pH value of chromate-zinc salt is 6.5-7.5, the pH value of molybdate is 7.5-10.0, the pH value of silicate is 7.5-10.0, the cold water quality index pH value is controlled within the range of 7.0-9.0, water with pH value of 7 is neutral at 25 ℃, so that the water with pH value of 7-9.2 is in a neutral or slightly alkaline range, generally speaking, the corrosiveness of cooling water is reduced along with the increase of the pH value in the above pH range, and the pH value of the cooling water is gradually increased to the natural equilibrium pH value if no sulfuric acid is added during the operation of the circulating cooling water, so that if the cooling water is operated under the condition lower than the natural equilibrium pH value, the pH value of the circulating cooling water system needs to be controlled by adding acid to ensure the heat transfer efficiency, the corrosivity of cooling water is reduced, and the normal operation of the crystallizer is ensured, so that the aim of ensuring the heat transfer efficiency is fulfilled.
2. The steel-making crystallizer steel-passing amount deepening steel index control method is characterized in that a bearing is movably mounted on the outer side of a dummy bar through the control of the running track of the dummy bar, a limiting ring in contact with the bearing is sleeved on the outer side of the dummy bar and moves horizontally along with the brake device of the dummy bar, the dummy bar is limited by the limiting ring in the moving process of the dummy bar depending on a motor, the moving deviation of the dummy bar can be reduced, the copper tube coating and the taper of a crystallizer are optimized, the copper tube lining coating is increased, the copper tube parameters are optimized, the copper tube blank drawing resistance is controlled on the premise that the wear resistance of a copper tube is increased, the friction between the limiting ring and the dummy bar is reduced, the wear of the dummy bar is reduced, the deviation caused by the change of the size of the dummy bar due to the wear is prevented, the moving error of the dummy bar is ensured to be within 5mm, and the purpose of reducing the abnormal wear of the copper tube coating is achieved.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious 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 given herein without making any creative effort, shall fall within the protection scope of the present invention.
The first embodiment is as follows: the steel index control method for deepening the steel passing amount of the steel-making crystallizer comprises the following steps of:
1) the control technology and equipment for the PH value index and the conductivity index of the cold water quality comprise a water tower and a monitoring terminal, wherein a water quality monitor is arranged in the water tower and is in direct contact with cold water in the water tower for real-time monitoring;
2) the cold water quality PH value index control method is characterized in that a water quality monitor monitors the PH value of cold water in real time, an input pipe extending to the cold water is arranged in a water tower, and the PH value is adjusted by adding a proper amount of corrosion inhibitor into the input pipe;
3) the method for controlling the conductivity index of the cold water quality comprises the steps that a conductivity controller is arranged inside a water tower, a water quality monitor monitors the conductivity of the cold water quality in real time, the water quality monitor transmits cold water information to a monitoring terminal, the conductivity controller is controlled through the monitoring terminal, and the conductivity of the cold water is adjusted;
4) the moving track of the dummy bar is controlled, a bearing is movably arranged on the outer side of the dummy bar, a limiting ring in contact with the bearing is sleeved on the outer side of the dummy bar and moves horizontally along with the braking device of the dummy bar, and the dummy bar is limited by the limiting ring in the moving process of the dummy bar depending on a motor, so that the moving deviation of the dummy bar can be reduced;
5) the copper pipe plating layer and the taper of the crystallizer are optimized, the copper pipe lining plating layer is added, the copper pipe parameters are optimized, and the copper pipe blank drawing resistance is controlled on the premise of increasing the wear resistance of the copper pipe.
The water tower in the step 1 is a closed cooling tower for a crystallizer, and a monitoring terminal is controlled and supervised by workers.
Step 2, the application range of the corrosion inhibitor is widened; the pH value range of chromate is 6.5-9.0, the pH value range of polyphosphate is 6.0-7.0, the pH value range of chromate-zinc salt is 6.5-7.5, the pH value range of molybdate is 7.5-10.0, the pH value range of silicate is 7.5-10.0, and the pH value range of cold water quality index is 7.0-9.0.
And 3, the conductivity controller adopts a singlechip to digitally calculate temperature compensation, has the functions of controlling relay output and switching temperature display by high and low limits, and is suitable for pure water manufacturing and cooling water towers.
And 4, the dummy bar rolls between the bearing and the limiting ring in the moving process, so that the friction between the limiting ring and the dummy bar is reduced, the abrasion of the dummy bar is reduced, the deviation caused by the change of the size of the dummy bar due to the abrasion is prevented, and the moving error of the dummy bar is ensured to be within 5 mm.
The control technology and equipment through the PH value index and the conductivity index of the cold water quality comprise a water tower and a monitoring terminal, wherein a water quality monitor is arranged inside the water tower, the water quality monitor is in direct contact with the cold water in the water tower and monitors the cold water in real time, a cold water quality PH value index control method is adopted, the water quality monitor monitors the pH value of the cold water in real time, an input pipe extending to the cold water is arranged in the water tower, the PH value is adjusted by adding a proper amount of corrosion inhibitor into the input pipe, a conductivity index control method of the cold water quality is adopted, a conductivity controller is arranged inside the water tower, the water quality monitor monitors the conductivity of the cold water in real time, the water quality monitor transmits cold water information to the monitoring terminal, the conductivity controller is controlled by the monitoring terminal, the conductivity of the cold water is adjusted, and the application range of the corrosion inhibitor is widened; the pH value of chromate is 6.5-9.0, the pH value of polyphosphate is 6.0-7.0, the pH value of chromate-zinc salt is 6.5-7.5, the pH value of molybdate is 7.5-10.0, the pH value of silicate is 7.5-10.0, the cold water quality index pH value is controlled within the range of 7.0-9.0, water with pH value of 7 is neutral at 25 ℃, so that the water with pH value of 7-9.2 is in a neutral or slightly alkaline range, generally speaking, the corrosiveness of cooling water is reduced along with the increase of the pH value in the above pH range, and the pH value of the cooling water is gradually increased to the natural equilibrium pH value if no sulfuric acid is added during the operation of the circulating cooling water, so that if the cooling water is operated under the condition lower than the natural equilibrium pH value, the pH value of the circulating cooling water system needs to be controlled by adding acid to ensure the heat transfer efficiency, the corrosivity of cooling water is reduced, and the normal operation of the crystallizer is ensured, so that the aim of ensuring the heat transfer efficiency is fulfilled.
Example two: the steel index control method for deepening the steel passing amount of the steel-making crystallizer comprises the following steps of:
1) the control technology and equipment for the PH value index and the conductivity index of the cold water quality comprise a water tower and a monitoring terminal, wherein a water quality monitor is arranged in the water tower and is in direct contact with cold water in the water tower for real-time monitoring;
2) the cold water quality PH value index control method is characterized in that a water quality monitor monitors the PH value of cold water in real time, an input pipe extending to the cold water is arranged in a water tower, and the PH value is adjusted by adding a proper amount of corrosion inhibitor into the input pipe;
3) the method for controlling the conductivity index of the cold water quality comprises the steps that a conductivity controller is arranged inside a water tower, a water quality monitor monitors the conductivity of the cold water quality in real time, the water quality monitor transmits cold water information to a monitoring terminal, the conductivity controller is controlled through the monitoring terminal, and the conductivity of the cold water is adjusted;
4) the moving track of the dummy bar is controlled, a bearing is movably arranged on the outer side of the dummy bar, a limiting ring in contact with the bearing is sleeved on the outer side of the dummy bar and moves horizontally along with the braking device of the dummy bar, and the dummy bar is limited by the limiting ring in the moving process of the dummy bar depending on a motor, so that the moving deviation of the dummy bar can be reduced;
5) the copper pipe plating layer and the taper of the crystallizer are optimized, the copper pipe lining plating layer is added, the copper pipe parameters are optimized, and the copper pipe blank drawing resistance is controlled on the premise of increasing the wear resistance of the copper pipe.
The water tower in the step 1 is a closed cooling tower for a crystallizer, and a monitoring terminal is controlled and supervised by workers.
Step 2, the application range of the corrosion inhibitor is widened; the pH value range of chromate is 6.5-9.0, the pH value range of polyphosphate is 6.0-7.0, the pH value range of chromate-zinc salt is 6.5-7.5, the pH value range of molybdate is 7.5-10.0, the pH value range of silicate is 7.5-10.0, and the pH value range of cold water quality index is 7.0-9.0.
And 3, the conductivity controller adopts a singlechip to digitally calculate temperature compensation, has the functions of controlling relay output and switching temperature display by high and low limits, and is suitable for pure water manufacturing and cooling water towers.
And 4, the dummy bar rolls between the bearing and the limiting ring in the moving process, so that the friction between the limiting ring and the dummy bar is reduced, the abrasion of the dummy bar is reduced, the deviation caused by the change of the size of the dummy bar due to the abrasion is prevented, and the moving error of the dummy bar is ensured to be within 5 mm.
The copper tube blank drawing resistance is controlled, friction between the limiting ring and the dummy bar is reduced, abrasion of the dummy bar is reduced, the size of the dummy bar is prevented from changing due to abrasion to cause deviation, the movement error of the dummy bar is ensured to be within 5mm, and the aim of reducing abnormal abrasion of a copper tube coating is fulfilled.
The invention has the beneficial effects that: the control technology and equipment through the PH value index and the conductivity index of the cold water quality comprise a water tower and a monitoring terminal, wherein a water quality monitor is arranged inside the water tower, the water quality monitor is in direct contact with the cold water in the water tower and monitors the cold water in real time, a cold water quality PH value index control method is adopted, the water quality monitor monitors the pH value of the cold water in real time, an input pipe extending to the cold water is arranged in the water tower, the PH value is adjusted by adding a proper amount of corrosion inhibitor into the input pipe, a conductivity index control method of the cold water quality is adopted, a conductivity controller is arranged inside the water tower, the water quality monitor monitors the conductivity of the cold water in real time, the water quality monitor transmits cold water information to the monitoring terminal, the conductivity controller is controlled by the monitoring terminal, the conductivity of the cold water is adjusted, and the application range of the corrosion inhibitor is widened; the pH value of chromate is 6.5-9.0, the pH value of polyphosphate is 6.0-7.0, the pH value of chromate-zinc salt is 6.5-7.5, the pH value of molybdate is 7.5-10.0, the pH value of silicate is 7.5-10.0, the cold water quality index pH value is controlled within the range of 7.0-9.0, water with pH value of 7 is neutral at 25 ℃, so that the water with pH value of 7-9.2 is in a neutral or slightly alkaline range, generally speaking, the corrosiveness of cooling water is reduced along with the increase of the pH value in the above pH range, and the pH value of the cooling water is gradually increased to the natural equilibrium pH value if no sulfuric acid is added during the operation of the circulating cooling water, so that if the cooling water is operated under the condition lower than the natural equilibrium pH value, the pH value of the circulating cooling water system needs to be controlled by adding acid to ensure the heat transfer efficiency, the corrosion of cooling water is reduced, the normal operation of a crystallizer is ensured, and the purpose of ensuring the heat transfer efficiency is achieved, a bearing is movably arranged on the outer side of a dummy bar through the control of the operation track of the dummy bar, a limit ring in contact with the bearing is sleeved on the outer side of the dummy bar and moves horizontally along with the braking equipment of the dummy bar, the dummy bar is limited by the limit ring in the moving process of the dummy bar by a motor, the moving deviation of the dummy bar can be reduced, the coating and the taper of a copper tube of the crystallizer are optimized, the coating of a copper tube lining is increased, the parameters of the copper tube are optimized, the blank drawing resistance of the copper tube is controlled on the premise of increasing the abrasion resistance of the copper tube, the friction between the limit ring and the dummy bar is reduced, the abrasion of the dummy bar is reduced, the deviation caused by the change of the size of the dummy bar due to the abrasion is prevented, the moving error of the dummy bar is ensured to be within 5mm, and the purpose of reducing the abnormal abrasion of the coating of the copper tube is achieved, the problem of continuous casting crystallizer lead to the steel volume and has decided the life of copper pipe, promote copper pipe lead to the steel volume reduction in production cost, reduce the change frequency of crystallizer simultaneously, increase and trade a packet equipment overhaul maintenance time and reduce personnel intensity of labour, the biggest promotion steel mill's output, stabilize steelmaking production organization, still have the space of improving is solved.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. The steel index control method for deepening the steel passing amount of the steel-making crystallizer is characterized by comprising the following steps of:
1) the control technology and equipment for the PH value index and the conductivity index of the cold water quality comprise a water tower and a monitoring terminal, wherein a water quality monitor is arranged in the water tower and is in direct contact with cold water in the water tower for real-time monitoring;
2) the cold water quality PH value index control method is characterized in that a water quality monitor monitors the PH value of cold water in real time, an input pipe extending to the cold water is arranged in a water tower, and the PH value is adjusted by adding a proper amount of corrosion inhibitor into the input pipe;
3) the method for controlling the conductivity index of the cold water quality comprises the steps that a conductivity controller is arranged inside a water tower, a water quality monitor monitors the conductivity of the cold water quality in real time, the water quality monitor transmits cold water information to a monitoring terminal, the conductivity controller is controlled through the monitoring terminal, and the conductivity of the cold water is adjusted;
4) the moving track of the dummy bar is controlled, a bearing is movably arranged on the outer side of the dummy bar, a limiting ring in contact with the bearing is sleeved on the outer side of the dummy bar and moves horizontally along with the braking device of the dummy bar, and the dummy bar is limited by the limiting ring in the moving process of the dummy bar depending on a motor, so that the moving deviation of the dummy bar can be reduced;
5) the copper pipe plating layer and the taper of the crystallizer are optimized, the copper pipe lining plating layer is added, the copper pipe parameters are optimized, and the copper pipe blank drawing resistance is controlled on the premise of increasing the wear resistance of the copper pipe.
2. The method for controlling an index of a steel for deepening the amount of passing steel through a steel-making crystallizer according to claim 1, wherein the steel is heated in a heating furnace; step 1 the water tower is a closed cooling tower for a crystallizer, and a monitoring terminal is controlled and supervised by a worker.
3. The method for controlling an index of a steel for deepening the amount of passing steel through a steel-making crystallizer according to claim 1, wherein the steel is heated in a heating furnace; the application range of the corrosion inhibitor is shown in step 2; the pH value range of chromate is 6.5-9.0, the pH value range of polyphosphate is 6.0-7.0, the pH value range of chromate-zinc salt is 6.5-7.5, the pH value range of molybdate is 7.5-10.0, the pH value range of silicate is 7.5-10.0, and the pH value range of cold water quality index is 7.0-9.0.
4. The method for controlling an index of a steel for deepening the amount of passing steel through a steel-making crystallizer according to claim 1, wherein the steel is heated in a heating furnace; and 3, the conductivity controller adopts a singlechip to digitally calculate temperature compensation, has the functions of controlling relay output and switching temperature display for high and low limits, and is suitable for pure water manufacturing and cooling water towers.
5. The method for controlling an index of a steel for deepening the amount of passing steel through a steel-making crystallizer according to claim 1, wherein the steel is heated in a heating furnace; and 4, the dummy bar rolls between the bearing and the limiting ring in the moving process, so that the friction between the limiting ring and the dummy bar is reduced, the abrasion of the dummy bar is reduced, the deviation caused by the change of the size of the dummy bar due to the abrasion is prevented, and the moving error of the dummy bar is ensured to be within 5 mm.
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| 方坯连铸结晶器铜管长寿工艺技术;赵阳等;《炼钢》;20160430;第32卷(第2期);第18-24页 * |
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| CN110153390A (en) | 2019-08-23 |
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