CN103240276A - Method for protecting edge heaters during hot rolling of stainless steel - Google Patents
Method for protecting edge heaters during hot rolling of stainless steel Download PDFInfo
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- CN103240276A CN103240276A CN2013101872027A CN201310187202A CN103240276A CN 103240276 A CN103240276 A CN 103240276A CN 2013101872027 A CN2013101872027 A CN 2013101872027A CN 201310187202 A CN201310187202 A CN 201310187202A CN 103240276 A CN103240276 A CN 103240276A
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- edge heater
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Abstract
The invention belongs to the field of automatic control of hot continuous rolling strip steel rolling lines and particularly relates to a method for protecting edge heaters during hot rolling of stainless steel. A first metal detector, a second metal detector and a third metal detector are installed on a roller way from a roughing mill to a connecting point of the roughing mill and a finishing mill, edge heaters are installed on two sides of the roller way behind the connecting point of the roughing mill and the finishing mill, during hot rolling of the stainless steel, strip steels move from the roughing mill to the finishing mill along the roller way, first-stage speed reduction is conducted when heads of strip steels move to the first metal detector, second-stage speed reduction is conducted when heads of strip steels move to the second metal detector, and when heads of strip steels move to the third metal detector, if edge heaters detect abnormalities, strip steels moving on the roller way are subjected to wandering control till strip steels return to normal conditions. By the aid of the method, the safety usage of edge heaters during rolling of the stainless steel is guaranteed.
Description
Technical field
The invention belongs to the automation field of hot-continuous-rolling strip steel rolling line, be specifically related to a kind of guard method of stainless steel hot-rolling process strip edge heater.
Background technology
In the stainless steel hot continuous rolling process, when hot-strip arrives, if strip edge heater breaks down and in time do not open, then can enter the strip edge heater zone by the fast and not timely band steel that stops because of the rolling line strip speed, cause the band steel to break strip edge heater.
Summary of the invention
Technical problem to be solved by this invention is: how to solve in rolling stainless steel, the device security of strip edge heater uses during with strip edge heater.
The technical solution adopted in the present invention is: the method for stainless steel hot-rolling process strip edge heater protection; to the roller-way of the interface point of roughing mill and finishing mill first metal detector is installed at roughing mill; second metal detector; the 3rd metal detector; roller-way both sides behind the interface point of roughing mill and finishing mill are equipped with strip edge heater; stainless steel is in course of hot rolling; the band steel moves to finishing mill along roller-way from roughing mill; one-level is slowed down when band steel toe portion moves to first metal detector; double reduction when band steel toe portion moves to second detector; when band steel toe portion moves to the 3rd detector; if strip edge heater detects unusually, then the band steel that operates on the roller-way is gone around control up to recovering normal.
As a kind of optimal way: first metal detector is installed in preceding 19 meters positions of the interface point of roughing mill and finishing mill, second metal detector is installed in preceding 15 meters positions of the interface point of roughing mill and finishing mill, the 3rd metal detector is installed in preceding 4 meters positions of the interface point of roughing mill and finishing mill, and strip edge heater is installed in back 1 meter position of the interface point of roughing mill and finishing mill.
As a kind of optimal way: the one-level back strip speed that slows down drops to 2m/s by 4.7m/s, and strip speed drops to 1.5m/s by 2m/s behind the double reduction.
As a kind of optimal way: to operate in band steel on the roller-way go around control refer to strip speed according to+/-the 0.5m/s running.
The invention has the beneficial effects as follows: guaranteed that strip edge heater normally controls and guaranteed the device security of strip edge heater.When coming into operation strip edge heater, solved the control of roughing, finish rolling interface point, avoided simultaneously because the rolling line steel scrap that the strip edge heater fault causes.Realize before the hot-rolling finishing mill band steel function of going around, reduced the cancel closedown time.Solve the relation of strip edge heater control with roll line control, improved product quality.
The specific embodiment
Shanxi Taigang Stainless Steel Co., Ltd's rougher of hot strip mill, finish rolling two districts roller table speed control interface point are in the preceding 10 meters position of finish rolling flying shear, and band steel handing-over speed is 2m/s, and the position of strip edge heater is in the preceding 9 meters position of finish rolling flying shear.Because the existence of the inertia of band steel and tracking control deviation, if the band steel with the speed of 2m/s in roughing, when finish rolling control interface point passes through, request roughing outlet roller-way is gone around in case strip edge heater equipment breaks down, the band steel will be rushed in the strip edge heater zone and break strip edge heater equipment, therefore guaranteeing under the normal rolling prerequisite, redesign roller-way deceleration point is controlled in advance and is reduced to be with steel interface point speed, is with steel can not break strip edge heater so that roughing exports when roller-way is gone around.When band steel toe portion arrives hot first metal detector (one-level deceleration point, preceding 29 meters of flying shear), realize that one-level is slowed down to export roller table speed and drop to 2m/s by 4.7m/s; When band steel toe portion arrives second metal detector (double reduction point, preceding 25 meters of flying shear), realize that double reduction will export roller table speed and drop to 1.5m/s by 2m/s, guaranteed the speed control of band steel before strip edge heater effectively.
Because the position of finish rolling and roughing junction is exactly the strip edge heater zone.In order to protect the equipment of strip edge heater; by preceding 5 meters the 3rd metal detector HMD53 of strip edge heater; examine to such an extent that be with under the situation of steel toe portion in strip edge heater use and HMD53; if strip edge heater equipment is examined unusually; strip edge heater sends the request of going around to roughing control; the function control of going around of roughing outlet roller-way when realization comes into operation strip edge heater is exactly roughing outlet roller table speed according to+/-the 0.5m/s running, reset up to request.
By realizing the control of roughing outlet roller-way double reduction; when going around, strip edge heater unit exception request roughing outlet roller-way guarantee to be with steel toe portion can not arrive strip edge heater; effective edge protection portion heater device safety, this functional effect is obvious, has reduced rolling line steel scrap and device damage.
Claims (4)
1. the guard method of stainless steel hot-rolling process strip edge heater; it is characterized in that: to the roller-way of the interface point of roughing mill and finishing mill first metal detector is installed at roughing mill; second metal detector; the 3rd metal detector; roller-way both sides behind the interface point of roughing mill and finishing mill are equipped with strip edge heater; stainless steel is in course of hot rolling; the band steel moves to finishing mill along roller-way from roughing mill; one-level is slowed down when band steel toe portion moves to first metal detector; double reduction when band steel toe portion moves to second detector; when band steel toe portion moves to the 3rd detector; if strip edge heater detects unusually, then the band steel that operates on the roller-way is gone around control up to recovering normal.
2. the method for stainless steel hot-rolling process strip edge heater according to claim 1 protection; it is characterized in that: first metal detector is installed in preceding 19 meters positions of the interface point of roughing mill and finishing mill; second metal detector is installed in preceding 15 meters positions of the interface point of roughing mill and finishing mill; the 3rd metal detector is installed in preceding 4 meters positions of the interface point of roughing mill and finishing mill, and strip edge heater is installed in back 1 meter position of the interface point of roughing mill and finishing mill.
3. the method for stainless steel hot-rolling process strip edge heater according to claim 2 protection is characterized in that: the one-level back strip speed that slows down drops to 2m/s by 4.7m/s, and strip speed drops to 1.5m/s by 2m/s behind the double reduction.
4. stainless steel according to claim 3 uses strip edge heater protection control method, it is characterized in that: to operate in band steel on the roller-way go around control refer to strip speed according to+/-the 0.5m/s running.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013101872027A CN103240276A (en) | 2013-05-21 | 2013-05-21 | Method for protecting edge heaters during hot rolling of stainless steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013101872027A CN103240276A (en) | 2013-05-21 | 2013-05-21 | Method for protecting edge heaters during hot rolling of stainless steel |
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| CN103240276A true CN103240276A (en) | 2013-08-14 |
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| CN2013101872027A Pending CN103240276A (en) | 2013-05-21 | 2013-05-21 | Method for protecting edge heaters during hot rolling of stainless steel |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103952528A (en) * | 2014-04-17 | 2014-07-30 | 北京佰能电气技术有限公司 | Automatic steel charging locating system and method for heating furnace |
| CN105032943A (en) * | 2015-07-28 | 2015-11-11 | 攀钢集团攀枝花钢钒有限公司 | Roughly-rolled plate blank tracking control method |
| CN110193519A (en) * | 2019-04-25 | 2019-09-03 | 山西太钢不锈钢股份有限公司 | A kind of control method for protecting strip edge heater heating head |
| CN112024614A (en) * | 2020-07-03 | 2020-12-04 | 山西太钢不锈钢股份有限公司 | Hot rolling E roller way speed control method |
| CN114210740A (en) * | 2021-12-06 | 2022-03-22 | 山西太钢不锈钢股份有限公司 | Automatic control method for cooling water of hot continuous rolling strip steel rolling line |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103952528A (en) * | 2014-04-17 | 2014-07-30 | 北京佰能电气技术有限公司 | Automatic steel charging locating system and method for heating furnace |
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| CN105032943A (en) * | 2015-07-28 | 2015-11-11 | 攀钢集团攀枝花钢钒有限公司 | Roughly-rolled plate blank tracking control method |
| CN110193519A (en) * | 2019-04-25 | 2019-09-03 | 山西太钢不锈钢股份有限公司 | A kind of control method for protecting strip edge heater heating head |
| CN112024614A (en) * | 2020-07-03 | 2020-12-04 | 山西太钢不锈钢股份有限公司 | Hot rolling E roller way speed control method |
| CN114210740A (en) * | 2021-12-06 | 2022-03-22 | 山西太钢不锈钢股份有限公司 | Automatic control method for cooling water of hot continuous rolling strip steel rolling line |
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Application publication date: 20130814 |