CN104138911A - Method for rapid water-cooling temperature control on intermediate blank of medium thick plate - Google Patents
Method for rapid water-cooling temperature control on intermediate blank of medium thick plate Download PDFInfo
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- CN104138911A CN104138911A CN201410229619.XA CN201410229619A CN104138911A CN 104138911 A CN104138911 A CN 104138911A CN 201410229619 A CN201410229619 A CN 201410229619A CN 104138911 A CN104138911 A CN 104138911A
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- 238000001816 cooling Methods 0.000 title claims abstract description 73
- 238000000034 method Methods 0.000 title claims abstract description 34
- 238000005096 rolling process Methods 0.000 claims abstract description 31
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 3
- 229910000831 Steel Inorganic materials 0.000 claims description 17
- 238000003801 milling Methods 0.000 claims description 17
- 239000010959 steel Substances 0.000 claims description 17
- 230000011218 segmentation Effects 0.000 claims description 16
- 238000013499 data model Methods 0.000 claims description 9
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- 230000007547 defect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
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Abstract
The invention discloses a method for rapid water-cooling temperature control on an intermediate blank of a medium thick plate. A device involved in the method comprises a controlled rolling and controlled cooling system of a rolling mill. The method is characterized in that in a controlled rolling and controlled cooling process, after first-time rolling is finished, the intermediate blank enters a laminar cooling layer for cooling control; after water cooling is finished, the intermediate blank is conveyed from the laminar cooling layer to a holding area to wait; when the surface temperature and the core temperature of the intermediate blank are restored to be uniform, the intermediate blank enters a second phase for rolling. Compared with an air-cooling temperature control process, a water-cooling temperature control process has the advantages that the holding time can be substantially shortened, according to experiments, water-cooling temperature control takes only 2-3 minutes, air-cooling temperature control takes 7-8 minutes, and the cooling time can exceed 10 minutes when thicker plates are cooled. By the aid of the method, the production efficiency is greatly improved, and the method has the very high social and economic benefit.
Description
Technical field
The present invention relates to the application of Mathematical Modeling on rolling mill for hot rolled planks and strips process control computer, especially relate to the method for the quick water-cooled temperature control of a kind of cut deal intermediate blank.
Background technology
In order to adapt to the keen competition in market, exploitation new product, improving the quality of products is the necessary ways that numerous Heavy Plate Production enterprise improves the competitiveness, and the cooling controlling and rolling controlling process in its production control technique is its crucial technique, and it directly affects production cost, efficiency and quality.Technological difficulties in cooling controlling and rolling controlling process are control refrigeration techniques.Existing Medium Steel Plate Controlled roll process mainly adopts the mode of air cooling to carry out cooling in the cold stage of control, when intermediate blank is thicker, air cooling time is oversize, general cool time is at 7-8 minute, can reach more than 10 minute thicker cool time, and the serious impact of so long temperature control time rhythm of production and output.The cold stage of existing control all adopts Finite Element Method model to control, and it is cooling after being mainly used in controlling and pricking, and refrigerating mode is that laminar flow is cooling, but this model can not be for the control of intermediate blank.And the steel plate of the market demand more than 80% needs to carry out controlled rolling, therefore must take the different types of cooling and controlled cooling method to reduce the temperature control time, how to the quick temperature control of intermediate blank, be combined with controlled rolling process, the temperature difference that rear steel plate is rolled in the minimizing of trying one's best is that one of difficult problem solving is being sought always by numerous steel mills.
Summary of the invention
Defect in view of above-mentioned prior art exists, the object of the invention is to propose a kind of method that makes the quick water-cooled temperature control of intermediate blank that cooling effectiveness is fast, efficiency is high.
For addressing the above problem, the technical solution used in the present invention is the method for the quick water-cooled temperature control of a kind of cut deal intermediate blank, the device that the method relates to includes the controlled rolling and controlled cooling system of milling train, it is characterized in that in cooling controlling and rolling controlling process, after rolling finishes for the first time, intermediate blank enters laminar flow cooling zone and carries out cooling control; After water-cooled finishes, intermediate blank is sent to from laminar flow cooling zone and treats warm area wait; When intermediate blank surface temperature and heart portion temperature recover evenly to enter second stage rolling.
The further technical scheme that the present invention adopts is:
Further, the controlled rolling and controlled cooling system of described milling train includes milling train first class control system, milling train second control system, and described milling train second control system model comprises intermediate blank data model, laminar flow cooling jig; Described intermediate blank data model is intermediate blank to be realized to segmentation detect, and while finally stinging steel together in the controlled rolling plate first stage, the whole cold target control temperature of the observed temperature at each segmentation control point of intermediate blank, thickness, speed and intermediate blank is sent to laminar flow cooling jig; Simultaneously described laminar flow cooling jig receives the intermediate blank related data that intermediate blank data model sends, and intermediate blank is carried out to segmentation tracking, and each section is calculated respectively to setting data, triggers laminar flow cooling jig and calculates laminar flow collector setting data.
Further, described workpiece thickness data for dividing seven layers to carry out finite difference calculating setting on thickness direction.
Further, it is the laminar flow cooling jig collector group number that calculates water-cooled and need to open to target temperature, mode and the water-cooled rear surface thermal recovery time of opening collector that described triggering laminar flow cooling jig calculates laminar flow collector setting data, by laminar flow cooling jig, automatically calculate reserved 1-2 minute simultaneously, intermediate blank surface temperature is returned to heart portion temperature close, temperature difference is no more than 20 ℃.
Further, describedly recover evenly for the intermediate blank surface temperature of surveying no longer raises when intermediate blank surface temperature and heart portion temperature.
Further, the spacing between described intermediate blank segmentation control point is 1 to 2 meter.
Further, the spacing between described intermediate blank segmentation control point is 1.5 meters.
The invention has the beneficial effects as follows: water-cooled temperature control technique is compared and can be reduced significantly time of staying temperature with air cooling temperature control, according to experiment, learn, adopt the water-cooled temperature control time to only have 2-3 minute, air cooling reaches 7-8 minute, and can reach more than 10 minute thicker cool time.This technology is greatly enhanced productivity, and has high economic results in society.
Accompanying drawing explanation
Fig. 1 is that intermediate blank is at machine front roller-way schematic diagram;
Fig. 2 is that intermediate blank enters laminar region schematic diagram.
The specific embodiment
The method of the quick water-cooled temperature control of a kind of cut deal intermediate blank of the present embodiment: the device that the method relates to includes the controlled rolling and controlled cooling system of milling train, controlled rolling and controlled cooling system includes milling train first class control system, milling train second control system, milling train second control system model comprises intermediate blank data model, laminar flow cooling jig; Intermediate blank data model is intermediate blank to be realized to segmentation detect, and while finally stinging steel together in the controlled rolling plate first stage, the whole cold target control temperature of the observed temperature at each segmentation control point of intermediate blank, thickness, speed and intermediate blank is sent to laminar flow cooling jig; Workpiece thickness data for dividing seven layers to carry out finite difference calculating setting on thickness direction.Laminar flow cooling jig receives the intermediate blank related data that intermediate blank data model sends simultaneously, and intermediate blank is carried out to segmentation tracking, and the spacing between intermediate blank segmentation control point is 1.5 meters.Each section is calculated respectively to setting data, trigger laminar flow cooling jig and calculate laminar flow collector setting data.Laminar flow collector setting data is the laminar flow cooling jig collector group number that calculates water-cooled and need to open to target temperature, mode and the water-cooled rear surface thermal recovery time of opening collector, by laminar flow cooling jig, automatically calculate reserved 1-2 minute simultaneously, intermediate blank surface temperature is returned to heart portion temperature close, temperature difference is no more than 20 ℃.
Revise one-level and control software, make intermediate blank after rolling finishes for the first time, enter laminar flow cooling zone and carry out cooling control; After water-cooled finishes, intermediate blank is sent to from laminar flow cooling zone and treats warm area wait; When intermediate blank surface temperature and heart portion temperature recover evenly to enter second stage rolling.
The X65 pipe line steel of producing 15mm of take is below example, as shown in Fig. 1 to 2: by the steel billet after heating furnace 1, dephosphorizing machine 2, temperature is 1200 ℃, sends into milling train 3 by roller-way, is rolled down to 4 times of target thickness, i.e. and the thick end roughing of 60mm.In roughing, first roll while finally stinging steel together, milling train secondary sends to laminar flow cooling jig by parameters such as the temperature of intermediate blank, thickness, speed, steel grade, rolling mode, intermediate blank target final cooling temperatures, laminar flow cooling jig will calculate intermediate blank water-cooled target temperature automatically according to different parameters such as steel grade, rolling mode, thickness, be generally than the high 30-80 degree of intermediate blank target final cooling temperature.
Trigger model calculates laminar flow cooling zone 4 collector unlatching group number and opening ways simultaneously.When laminar flow entrance pyrometer detects steel plate head, cooling jig will start segmentation following function, and every section of segment length is 1.5 meters, to entering each section of steel plate of laminar flow cooling zone 4, adopt real time data to calculate respectively collector opening ways and group number.And each section of steel plate of laminar flow cooling zone carried out to real-time tracking.After water-cooled finishes, it is cooling that steel plate has roller-way to deliver to the swing of machine front roller-way, when surface temperature goes back up to a little more than 930 degree, temperature starts to top out, then start to decline, when surface temperature drops to after 930 degree, roller-way delivers to by intermediate blank the rolling that milling train starts the finish rolling stage, until be rolled down to target thickness 15mm.
By the change of software, model having been realized to feedforward, the feedback closed loop of model, control, realize simultaneously the segmentation of steel plate intermediate blank is followed the tracks of, every 1.5 meters is one section along its length, and each section is calculated respectively to setting data.To steel billet temperature, on thickness direction, divide seven layers and carry out finite difference calculating, thus the precision of assurance temperature computation.
In addition to the implementation, the present invention can also have other embodiments.All employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop on the protection domain of requirement of the present invention.
Claims (7)
1. a method for the cooling temperature control of cut deal intermediate blank rapid water, the device that the method relates to includes the controlled rolling and controlled cooling system of milling train, it is characterized in that in cooling controlling and rolling controlling process, and after rolling finishes for the first time, intermediate blank enters laminar flow cooling zone and carries out cooling control; After water-cooled finishes, intermediate blank is sent to from laminar flow cooling zone and treats warm area wait; When intermediate blank surface temperature and heart portion temperature recover evenly to enter second stage rolling.
2. the method for the quick water-cooled temperature control of a kind of cut deal intermediate blank according to claim 1, it is characterized in that: the controlled rolling and controlled cooling system of described milling train includes milling train first class control system, milling train second control system, described milling train second control system model comprises intermediate blank data model, laminar flow cooling jig; Described intermediate blank data model is intermediate blank to be realized to segmentation detect, and while finally stinging steel together in the controlled rolling plate first stage, the whole cold target control temperature of the observed temperature at each segmentation control point of intermediate blank, thickness, speed and intermediate blank is sent to laminar flow cooling jig; Simultaneously described laminar flow cooling jig receives the intermediate blank related data that intermediate blank data model sends, and intermediate blank is carried out to segmentation tracking, and each section is calculated respectively to setting data, triggers laminar flow cooling jig and calculates laminar flow collector setting data.
3. the method for the quick water-cooled temperature control of a kind of cut deal intermediate blank according to claim 2, is characterized in that: described workpiece thickness data for dividing seven layers to carry out finite difference calculating setting on thickness direction.
4. the method for the quick water-cooled temperature control of a kind of cut deal intermediate blank according to claim 3, it is characterized in that: it is the laminar flow cooling jig collector group number that calculates water-cooled and need to open to target temperature, mode and the water-cooled rear surface thermal recovery time of opening collector that described triggering laminar flow cooling jig calculates laminar flow collector setting data, by laminar flow cooling jig, automatically calculate reserved 1-2 minute simultaneously, intermediate blank surface temperature is returned to heart portion temperature close, temperature difference is no more than 20 ℃.
5. the method for the quick water-cooled temperature control of a kind of cut deal intermediate blank according to claim 2, is characterized in that: describedly recover evenly for the intermediate blank surface temperature of surveying no longer raises when intermediate blank surface temperature and heart portion temperature.
6. the method for the quick water-cooled temperature control of a kind of cut deal intermediate blank according to claim 2, is characterized in that: the spacing between described intermediate blank segmentation control point is 1 to 2 meter.
7. the method for the quick water-cooled temperature control of a kind of cut deal intermediate blank according to claim 2, is characterized in that: the spacing between described intermediate blank segmentation control point is 1.5 meters.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105834214A (en) * | 2015-01-16 | 2016-08-10 | 宝山钢铁股份有限公司 | Temperature-controlled rolling equipment for production of metal plate in coils |
| CN109112392A (en) * | 2018-07-17 | 2019-01-01 | 张家港宏昌钢板有限公司 | TMCP (thermal mechanical control processing) type high-strength-toughness high-fatigue-performance weather-resistant bridge steel plate and preparation method thereof |
| CN111069307A (en) * | 2019-12-09 | 2020-04-28 | 北京科技大学 | An intermediate cooling method for medium and thick plates suitable for multiple processes |
| CN115069785A (en) * | 2021-03-15 | 2022-09-20 | 宝山钢铁股份有限公司 | Control method for batch temperature waiting of intermediate blanks |
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| CN202779191U (en) * | 2012-08-29 | 2013-03-13 | 江苏博际喷雾系统有限公司 | Middle billet cooling system for steel billets |
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2014
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Patent Citations (6)
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| JPH0857520A (en) * | 1994-08-24 | 1996-03-05 | Nippon Steel Corp | Rolling method for hot steel plate |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105834214A (en) * | 2015-01-16 | 2016-08-10 | 宝山钢铁股份有限公司 | Temperature-controlled rolling equipment for production of metal plate in coils |
| CN109112392A (en) * | 2018-07-17 | 2019-01-01 | 张家港宏昌钢板有限公司 | TMCP (thermal mechanical control processing) type high-strength-toughness high-fatigue-performance weather-resistant bridge steel plate and preparation method thereof |
| CN111069307A (en) * | 2019-12-09 | 2020-04-28 | 北京科技大学 | An intermediate cooling method for medium and thick plates suitable for multiple processes |
| CN111069307B (en) * | 2019-12-09 | 2021-08-20 | 北京科技大学 | An intermediate cooling method for medium and thick plates suitable for multiple processes |
| CN115069785A (en) * | 2021-03-15 | 2022-09-20 | 宝山钢铁股份有限公司 | Control method for batch temperature waiting of intermediate blanks |
| CN115069785B (en) * | 2021-03-15 | 2024-07-12 | 宝山钢铁股份有限公司 | Control method for batch collection and waiting temperature of intermediate blanks |
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| CN104138911B (en) | 2016-06-29 |
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