CN105728680A - Gas-water balance dynamical control method for continuous-casting machine - Google Patents
Gas-water balance dynamical control method for continuous-casting machine Download PDFInfo
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- CN105728680A CN105728680A CN201610287622.6A CN201610287622A CN105728680A CN 105728680 A CN105728680 A CN 105728680A CN 201610287622 A CN201610287622 A CN 201610287622A CN 105728680 A CN105728680 A CN 105728680A
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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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
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- Continuous Casting (AREA)
Abstract
The invention aims to provide a gas-water balance dynamical control method for a continuous-casting machine, and aims to realize real-time response to secondary cooling water pressure change due to various causes of height difference adjustment, dynamic water amount adjustment and the like through dynamical adjustment of the pressure of secondary cooling compressed air and keep gas water balance at an optimal atomizing effect required value. According to a technological means, the method comprises the following steps: determining a gas water balance state of a nozzle required for achieving an optimal atomizing cooling effect through cold-hot state experiment data of the nozzle during model selection of the nozzle so as to set a set curve for air pressure-water amount in each cooling segment; then, arranging a pressure adjusting valve and a pressure transmitter in a compressed air inlet pipeline of each cooling branch; dynamically controlling the secondary cooling compressed air inlet pressure of each branch by adopting a PID (Proportion, Integral and differential) adjusting way and taking a current water amount of each branch as an independent variable according to the determined set curve of the air pressure-water amount of the nozzle so as to always keep the gas water balance in an optimal state.
Description
Technical field
The present invention relates to a kind of isorrheic control method of metallurgical continuous casting gas, particularly relate to a kind of conticaster air water balance dynamic control method.
Background technology
In the secondary cooling process of modern conticaster, in order to keep, cooling is uniform, improve cc billet surface quality, mostly use dynamic gas water cooling, due in cooling procedure, the air water nozzle used carrys out atomization cooling water by being passed through compressed air, although atomization can be realized in a range of gas-water ratio by the optimization of nozzle design, but for reaching optimal atomizing effect in actual production process, it is still necessary to optimize air water by Field adjustment and balance；
On the other hand, owing to conticaster itself is highly general at tens meters, the difference of 0.1-0.2MPa will be there is due to difference in height in the front end cooling section of conticaster with the hydraulic pressure of rear portion cooling section, at present after installation of conticaster, generally by installing orifice plate in waterway pipe, to balance the water pressure of before and after's section poor, and its method is complicated and regulation is difficult；
During continuous casting is carried out, owing to dynamic water allocation requires that cooling water inflow dynamically changes with pulling rate.The regulation of cooling water inflow can cause the dynamic change of nozzle-end hydraulic pressure, traditional air water regulation can only adapt to certain static hydraulic pressure, the most easily affect atomizing effect when the water yield is excessive or the water yield is too small；
Current Static Gas water balance mode is owing to needing the atomizing effect during compressed air pressure guarantee maximum amount of water used, and the air pressure generally used is higher, will cause two cold compression air excess releases when cooling water inflow is less, and cause huge waste.
Summary of the invention
It is an object of the invention to provide a kind of conticaster air water balance dynamic control method, it is capable of the pressure by dynamically regulating two cold compression air, the secondary cooling water pressure change realizing causing a variety of causes such as difference in height, dynamic runoff investigation carries out real time reaction, makes air water balance be maintained at optimal atomizing effect required value.
It is an object of the invention to realize with following technological means: first carry out design for continuous casting machine calculating, and select nozzle according to the result of two cold water distributions calculating, when nozzle type selecting by the cold and hot experimental data of nozzle, determine that nozzle realizes the air water poised state required for optimal atomization cooling effect, thus set the setting curve of air pressure-water yield in each cooling section, then by arranging pressure-regulating valve and pressure transmitter in the compressed air inlet pipe road of each cooling branch road, use P I D(ratio, integration, differential) regulative mode, the air pressure of nozzle determined by according to-water yield setting curve, with the current water yield of this branch road as independent variable, dynamically control two cold compression air inlet pressure of each branch road, air water balance is made to remain at optimum state.
The conticaster air water balance dynamic control method of the present invention provides the benefit that: by pressure-regulating valve and pressure transmitter, according to the water yield-air pressure setting curve of nozzle, two cold compression air are dynamically regulated, can be dynamic, stably the air water of vapor-water cooling is balanced and be maintained at theoretical optimum state, method is simple, regulate easy, cooling effect is stable, simultaneously, owing to taking the most dynamically regulation of air pressure-water yield, greatly reduce the consumption of two cold compression air under little water yield state, decrease a ton steel compressed air consumption, as a example by shown in Fig. 3, under certain model nozzle characteristic, under identical cooling water inflow, the dynamic gas water balance control method of the present invention is compared with Static Gas water balance control method, its compressed air consumption reduces about 50%.
Accompanying drawing explanation
Fig. 1 is the control flow chart of the conticaster air water balance dynamic control method of the present invention.
Fig. 2 is air pressure-water yield setting curve.
Fig. 3 is that compressed air consumption compares.
Detailed description of the invention
nullSee Fig. 1、Fig. 2，Certain conticaster air water balance kinetic-control system，First calculate according to design for continuous casting machine and carry out two cold water distributions calculating，Thus carry out nozzle model specification selection，By the cold and hot experimental data of nozzle，Determine that nozzle realizes the air water poised state required for optimal atomization cooling effect，Thus set the setting curve of air pressure-water yield in N number of cooling section，Then by arranging pressure-regulating valve and pressure transmitter in the compressed air inlet pipe road of each cooling branch road，Use P I D regulative mode，The air pressure of nozzle determined by according to-water yield setting curve，Give the water yield current with this branch road as independent variable with two cold dynamic water allocation systems，Dynamically control two cold compression air inlet pressure of each branch road，And with as use P I D regulative mode to control this branch road actual amount of water form optimal atomization cooling water and spray，So that air water balance remains at optimum state.
Claims (2)
1. a conticaster air water balance dynamic control method, it is characterized in that: first determine that nozzle realizes the air water poised state required for optimal atomization cooling effect, thus set the setting curve of air pressure-water yield in each cooling section, then by arranging pressure-regulating valve and pressure transmitter in the compressed air inlet pipe road of each cooling branch road, use P I D(ratio, integration, differential) regulative mode, the air pressure of nozzle determined by according to-water yield setting curve, with the current water yield of this branch road as independent variable, dynamically control two cold compression air inlet pressure of each branch road, air water balance is made to remain at optimum state.
A kind of conticaster air water balance dynamic control method the most according to claim 1, it is characterised in that: described air pressure-water yield setting curve is to be determined by the cold and hot experimental data of nozzle when nozzle type selecting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610287622.6A CN105728680B (en) | 2016-05-04 | 2016-05-04 | Conticaster air water balances dynamic control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201610287622.6A CN105728680B (en) | 2016-05-04 | 2016-05-04 | Conticaster air water balances dynamic control method |
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| CN105728680A true CN105728680A (en) | 2016-07-06 |
| CN105728680B CN105728680B (en) | 2017-09-22 |
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| CN201610287622.6A Active CN105728680B (en) | 2016-05-04 | 2016-05-04 | Conticaster air water balances dynamic control method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107671252A (en) * | 2017-09-29 | 2018-02-09 | 四川德胜集团钒钛有限公司 | A kind of Continuous Casting Secondary Cooling system |
| CN110625080A (en) * | 2019-09-23 | 2019-12-31 | 中冶南方连铸技术工程有限责任公司 | Intelligent detection and control method for online working state of continuous casting secondary cooling system |
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| JPS58184047A (en) * | 1982-04-20 | 1983-10-27 | Nippon Steel Corp | Secondary cooling method of ingot in continuous casting installation |
| JPS59185557A (en) * | 1983-04-05 | 1984-10-22 | Sumitomo Metal Ind Ltd | Device for spraying cooling water to continuous casting billet |
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| CN103008579A (en) * | 2012-12-28 | 2013-04-03 | 哈尔滨工业大学 | Continuous casting and directional solidification method of titanium aluminum alloy suspended cold crucible |
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| CN104884189A (en) * | 2012-12-21 | 2015-09-02 | 株式会社Posco | Hybrid cooling nozzle apparatus, and method for controlling cooling nozzle of continuous casting equipment using same |
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2016
- 2016-05-04 CN CN201610287622.6A patent/CN105728680B/en active Active
Patent Citations (8)
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| JPS58184047A (en) * | 1982-04-20 | 1983-10-27 | Nippon Steel Corp | Secondary cooling method of ingot in continuous casting installation |
| JPS59185557A (en) * | 1983-04-05 | 1984-10-22 | Sumitomo Metal Ind Ltd | Device for spraying cooling water to continuous casting billet |
| JP2006326625A (en) * | 2005-05-25 | 2006-12-07 | Kogi Corp | Cast iron bar having deformed cross section, and continuous casting method and apparatus therefor |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107671252A (en) * | 2017-09-29 | 2018-02-09 | 四川德胜集团钒钛有限公司 | A kind of Continuous Casting Secondary Cooling system |
| CN110625080A (en) * | 2019-09-23 | 2019-12-31 | 中冶南方连铸技术工程有限责任公司 | Intelligent detection and control method for online working state of continuous casting secondary cooling system |
| CN110625080B (en) * | 2019-09-23 | 2022-04-26 | 中冶南方连铸技术工程有限责任公司 | Intelligent detection and control method for online working state of continuous casting secondary cooling system |
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| CN105728680B (en) | 2017-09-22 |
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