CN107695479A - Clear method for cleaning is leaked at the clear plate blank chamfering of elimination machine - Google Patents
Clear method for cleaning is leaked at the clear plate blank chamfering of elimination machine Download PDFInfo
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- CN107695479A CN107695479A CN201710797669.1A CN201710797669A CN107695479A CN 107695479 A CN107695479 A CN 107695479A CN 201710797669 A CN201710797669 A CN 201710797669A CN 107695479 A CN107695479 A CN 107695479A
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- Prior art keywords
- burner
- clear
- slab
- chamfering
- cleaning
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K7/00—Cutting, scarfing, or desurfacing by applying flames
- B23K7/06—Machines, apparatus, or equipment specially designed for scarfing or desurfacing
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K7/00—Cutting, scarfing, or desurfacing by applying flames
- B23K7/10—Auxiliary devices, e.g. for guiding or supporting the torch
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Metal Rolling (AREA)
Abstract
The invention discloses clear method for cleaning is leaked at a kind of clear plate blank chamfering of elimination machine, it is cleared up slab with after chamfer crystallizer chamfering using hot scarfing machine, and the side burner of the hot scarfing machine is fixed on to be adapted at height with slab thickness；The oxygen pressure of burner is at the plate blank chamfering：OSB 2.4MPa, OST 2.4MPa, 2.45~2.55MPa of OSBE, 2.45~2.55MPa of OSTE, 2.45~2.55MPa of OSBFX, 2.45~2.55MPa of OSTFX, 2.45~2.55MPa of OSBFL, 2.45~2.55MPa of OSTFL.This method fixing side burner height, change burner closed manners, ensure side burner closure in place, ensure that the flame that side burner sprays meets the requirements with slab angle, make preheating open condition good, optimize the pressure medium of slab leptoprosopy burner simultaneously, ensure not leak it is clear in the case of can also be as big as possible raising recovery rate of iron.This method technique is simple, and the leakage that can effectively remove at plate blank chamfering is clear, avoids manual cleaning, so as to improve operating environment, save the operating time, ensure that rhythm of production.
Description
Technical field
The present invention relates to a kind of method for cleaning of slab, clear cleaning side is leaked at especially a kind of clear plate blank chamfering of elimination machine
Method.
Background technology
Handan treasured steel plant continuous casting workshop hot scarfing machine put into serial production use October 26 in 2012, mainly to car panel
The steel grade that the Surface Qualities such as steel, pipe line steel, tank material, silicon steel require higher is cleared up, and also base end to end, abnormal base etc. can be held
The slab for being also easy to produce quality problems is cleared up, and eliminates surface defect of bloom, is improved product quality, is reduced production cost, improves
The harsh work situation of manual cleaning, strand primes qualification rate is improved, improve corporate income.With variety steel proportion of production
Increase, micro alloyed steel production capacity is constantly increasing.A kind of slab quality defect that Cracks In Continuous Cast Billets are most common and quantity is most,
According to statistics, more than the 50% of all kinds of defects is accounted for.Among these based on strand transverse corner crack line, and conventional way is manually to enter
Row trimming, trimming processing causes enormous impact to rhythm of production and logistics, to ensure the perfectly safe of slab quality, Handan Iron and Steel Co in
July 6 day two in 2013, the stream of casting machine four was all reached the standard grade using chamfer crystallizer.The chamfering slab of chamfer crystallizer production is therewith
The slab of preceding right angle crystallizer production has very big difference in outward appearance in shape, and the slab leptoprosopy of right angle crystallizer production is four
Individual right angle, and chamfering base has 8 obtuse angles, slab corner shape is become the chamfering for turning to 30 × 40mm by right angle.Clear up chamfering continuous casting
Base still belongs to the first time for the CM-90-8-1 type hot scarfing machines of L-TEC companies.The current hot scarfing machine model of L-TEC companies
It is to be directed to right angle slab designing, therefore can occurs leaking clear situation always in fillet surface during the cleaning of chamfering base, how solves chamfering
Clear problem is leaked in base corner, turns into a new technical barrier, L-TEC and domestic other unit are before also without the technology of maturation
Solution can be used for reference.
The positioning of the burner of CM-90-8-1 type hot scarfing machines in itself is controlled by cylinder system, the design of burner
It is right-angle design, chamfering base is after burner positioning, just at hollow out area at chamfering, is burnt under the conditions of same pressure medium
The flame that mouth sprays is difficult to reach at chamfering inclined-plane, and easily leakage is clear.Artificial treatment is also carried out after leakage is clear, manual cleaning is time-consuming
Arduously, and ejection is limited to across the restriction of the factors such as overhead traveling crane, panel turnover machine, influence rhythm of production.If will be from burner as point of penetration
If being transformed, first, costly, second, technical requirements are high and risky presence, the processing of copper spare part is again extremely difficult,
Feasibility is relatively low.
The content of the invention
Simply eliminated the technical problem to be solved in the present invention is to provide a kind of technique and clearly clear is leaked at the clear plate blank chamfering of machine
Reason method.
In order to solve the above technical problems, the technical solution used in the present invention is：It is by slab chamfer crystallizer chamfering
Cleared up afterwards using hot scarfing machine, the side burner of the hot scarfing machine is fixed on is adapted height with slab thickness
Place；The oxygen pressure of burner is at the plate blank chamfering：OSB 2.4MPa, OST 2.4MPa, 2.45~2.55MPa of OSBE, OSTE
2.45~2.55MPa, 2.45~2.55MPa of OSBFX, 2.45~2.55MPa of OSTFX, 2.45~2.55MPa of OSBFL,
2.45~2.55MPa of OSTFL.
The side burner of hot scarfing machine of the present invention is fixed on 241mm and highly located.
The oxygen pressure of burner is at plate blank chamfering of the present invention：OSB 2.4MPa、OST 2.4MPa、OSBE 2.5MPa、
OSTE 2.5MPa、OSBFX 2.5MPa、OSTFX 2.5MPa、OSBFL 2.5MPa、OSTFL 2.5MPa。
It is using beneficial effect caused by above-mentioned technical proposal：Fixing side burner height of the present invention, changes burner
Closed manners, ensure side burner closure in place, ensure that the flame that side burner sprays meets the requirements with slab angle, make preheating
Open condition is good, while optimizes the pressure medium of slab leptoprosopy burner, can also be as big as possible in the case where ensureing not leaking clearly
Raising recovery rate of iron.Present invention process is simple, and the leakage that can effectively remove at plate blank chamfering is clear, avoids manual cleaning,
So as to improve operating environment, save the operating time, ensure that rhythm of production.
Brief description of the drawings
The present invention is further detailed explanation with reference to the accompanying drawings and detailed description.
Fig. 1-6 is hot scarfing machine common process process schematic；
Fig. 7-13 is hot scarfing machine present invention process process schematic；
Figure 14 is the correspondence position figure of each pressure code and burner.
In figure：The upper and lower burners of 1-；2- sides burner；3- slabs.
Embodiment
Clear method for cleaning is leaked at the clear plate blank chamfering of this elimination machine and uses following techniques：
1st, fixing side burner height, change burner closed manners, ensure closure in place, ensure side burner spray flame with
Slab angle meets cleaning and required.
During fiery clear cleaning cycle, the positioning of slab needs and closure is engaged.What Fig. 1-6 was recorded is that former design is clear
Manage the cycle whole process slab closing order related to burner：Shown in Fig. 1, under fiery clear holding state, the burner framework at four sides
Under pneumatic control effect, in recovery open mode；In the first step that cleaning cycle starts, it is upper and lower to carry out shown in Fig. 2
Burner 1 closes, and upper row's burner, lower row's burner, which decline and risen respectively under pneumatic control, presses close to slab 3, then upper and lower burner 1
Respectively retract 12.5mm；Second step two side burners 2 as shown in Figure 3 carry out horizontal closed；Then shown in Fig. 4, two sides are burnt
Mouth 2 is retracted, and regulation up and down carries out side calibration；Shown in Fig. 5, locked after burner calibration, now the burner in four faces starts
Pre-heating technique；After pre-heating technique terminates, upper and lower burner 1 and side burner 2 close again, locking of floating, you can it is clear to carry out flame
Reason；As shown in fig. 6, after the cleaning of slab 3 terminates, burner framework recovery in four sides is opened, and whole cleaning cycle terminates.
The burner of design code and the angle of slab are 35 °.In cleaning cycle, Fig. 3 and Fig. 4 are side burner closure
The sequencing of positioning.Wherein, burner caused by frequently occurring closed orientation inaccuracy during Fig. 3 with slab angle not
Stabilization, as shown in figure 3, for right leptoprosopy, in order to be positioned according to width of plate slab, narrow side burner is above before positioning
Lower row's burner, when narrow side burner touches slab, pressure sensor has signal and transmitted to PLC, and air puck is persistently to perseverance
Constant-pressure, latched position, and then Fig. 4 action is carried out, level is kept out of the way, and narrow side burner rises, and all covers slab leptoprosopy.It is and right
For chamfering slab, in Fig. 3 release, because distance of the leptoprosopy burner higher than lower row's burner is less than chamfering height
To spend, leptoprosopy burner end is by chance in chamfering chamfered region at the end of horizontal closed, after the completion of when side, burner keeps out of the way 12.5mm,
Side burner top just reaches the corner of chamfered area, and burner can barely rise, but burner during rise with plate
Base friction is serious, damages burner, loosens burner, scratches slab, because distance changes between slab and burner, flame angle
It is impossible to ensure that at 35 ° or so, it is impossible to form effective melt region and cause leakage clear.This is ordinary circumstance.Severe patient, keep out of the way
Cheng Hou, side burner top is still within chamfering chamfered region, during Fig. 4 rise, it is impossible to execution, causes narrow
Face and chamfered area are all leaked please.
In summary situation, with reference to this actual conditions of our factory slab thickness 241mm specifications, studied by field exploring,
Final side burner of formulating is fixed on 241 this data according to slab thickness, makes the end of burner to the height of upper and lower horizontal burner
Spend for 241mm.Adjust retreating position up and down simultaneously side burner is being fixed with stainless steel tube, corresponding to air puck pressure
Pressure recovery returns to zero.
So fixed trailing flank burner makes it, and there is no rise, decline function, it means that vertically-acting completes trailing flank
Burner is just calibrated to finish, and direct horizontal closed, level are kept out of the way can and preheated, and have so both avoided side burner top
The situation that end is stuck in chamfered area occurs, and can guarantee side burner all region covering slab, and the angle of slab and burner also accords with
Close and require.The closing order of burner is also changed after this method is implemented, shown in order below figure 7-13：Shown in Fig. 7,
Under fiery clear holding state, the burner framework at four sides is under pneumatic control effect, in recovery open mode；Opened in cleaning cycle
The first step of beginning, carry out Fig. 8 shown in be that upper and lower burner 1 closes, upper row's burner, lower row's burner under pneumatic control respectively under
Slab 3 is pressed close in drop and rising；Burner 1 respectively retracts 12.5mm to second step up and down as shown in Figure 9, is locked；Then shown in Figure 10,
Two side burners 2 carry out horizontal balance and go to be bonded slab 3 respectively；Shown in Figure 11, two side burners 2 carry out rollback 12.5mm
Action, is locked, now the burner in four faces starts pre-heating technique；As shown in figure 12, after pre-heating technique terminates, upper and lower burning
Mouth 1 and side burner 2 close again, locking of floating, you can carry out scafing；As shown in figure 13, after the cleaning of slab 3 terminates,
Four sides burner framework recovery is opened, and whole cleaning cycle terminates.
2nd, using corner depth cleaning function.
The CM-90-8-1 type hot scarfing machines for using L-TEC companies of Handan treasured steel mill, rank is originated in scafing
Section, the oxygen and fuel gas sprayed from burner melt the fritter FX of slab one, and setting speed is pressed in this region immediately
It is oxidized and removes.It is required that the oxygen stream of continuous dried over anhydrous is sprayed on billet surface with acute angle, this mixture of oxygen stream removes slab table
Face is to set depth.
The major parameter for determining cleaning technology is cleaning depth（d）, it is influenced by factors.Clear up depth（d）By
Clear up oxygen pressure（[O2]）, steel billet temperature（T）, carbon equivalent（Ceq）, clear up speed（V）And status of equipment（δ）Deng influence.
Amid all these factors, its functional relation is formula I：
d=f([O2],T,Ceq,V,δ……) Ⅰ
When (T, Ceq, δ ...) one timing, cleaning depth depends primarily on cleaning oxygen pressure and cleaning speed, and its relational expression is
Formula II：
D ∝ [O2], d ∝ 1/V II
（1）Clear up depth with cleaning oxygen pressure it is directly proportional, when oxygen pressure within the specific limits when, clear up oxygen pressure get over
Height, cleaning depth are deeper；It is conversely, then more shallow.
（2）Cleaning depth is inversely proportional with cleaning speed, and when clearing up speed within the specific limits, cleaning speed is faster, clearly
It is more shallow to manage depth；It is conversely, then deeper.
When being cleared up due to chamfering slab, the speed of travel in chamfered area and other regions of slab be it is unalterable, in order to
Reach and both can guarantee that and do not leak clear, and can makes recovery rate of iron purpose as high as possible, therefore can only optimize cleaning oxygen pressure.
Corner depth cleaning function, change can be allowed to make folding corner region pressure medium, and then change cleaning depth.Clear up depth
Difference be accomplished by different set of high pressure oxygen flowing pressure（FX, enclosed region, variable domain）, each pressure
The implication of code is shown in Table 1, and the correspondence position of each pressure code and burner is shown in Figure 14.
Table 1：The implication of each pressure code
In table 1, slab leptoprosopy is the side of slab.
Experiment initial stage, cleaning oxygen pressure corresponding to OSBE, OSTE, OSBFL, OSBFX, OSTFX, OSTFL six is entered
Row is stepped up, collection cleaning data, and surveys slab cleaning depth, and data are analyzed, seek optimum pressure and cleaning
Contrast on effect relation, finds equalization point and reaches and both can guarantee that and do not leak clear, and and can makes recovery rate of iron purpose as high as possible,
3 sets of experimental programs are formulated respectively and draw corresponding experimental result comparison diagram, as shown in table 2 below, the implementation data system of each scheme
Meter is shown in Table 3.
Table 2：Clear up oxygen pressure regime
Table 3：The implementation data statistics of each scheme
As can be seen from Table 3, the feasibility of scheme 2 and overall merit highest, the clear rate of leakage or higher, the depth of scheme 3 of scheme 1
Clear shallow clear depth difference is bigger than normal, forms groove sometimes, causes to be likely to form other defect in the follow-up operation of rolling.
3rd, after this method process implementing, corner cleaning situation is obviously improved, and no longer occurs leaking clearly at angle substantially.
（1）Except few loss is thined in chamfering leakage：Using after this method, chamfering leakage is clear within 2016 in Handan treasured steel plant continuous casting workshop
Slab 5%；And when using former technique within 2015, chamfering base leakage clear 85%.The clear clear cost of hand that carries out of leakage is 20 yuan per ton every time, is pressed
Calculated according to 20,000 tons of year steel transportation amount, then thining few loss because of chamfering leakage is：20000*（85%-5%）* 160=2,560,000 yuan.
（2）Burner consumes reduced loss：Two narrow 250 pieces of side burner service lifes bring up to 580 pieces, same steel transportation amount
In the case of burner replacement frequency substantially reduce, every 10,000 tons compared with former technique in 2015 when reduce 8.Often repairing a set of burner will
5.7 ten thousand yuan, calculated according to 20,000 tons of year steel transportation amount, reduce and change the cost of equipment of burner saving and be：2*8*5.7 ten thousand yuan=91.2 ten thousand
Member.
（3）Have it is above-mentioned understand, Handan treasured steel plant continuous casting workshop 2016 compared to 2015 using using former work after this method
During skill, it is 347.2 ten thousand yuan to add up to year economic benefit.
Claims (3)
1. leak clear method for cleaning at a kind of clear plate blank chamfering of elimination machine, it is by slab with using flame after chamfer crystallizer chamfering
Descaling machine is cleared up, it is characterised in that：The side burner of the hot scarfing machine is fixed on is adapted height with slab thickness
Place；The oxygen pressure of burner is at the plate blank chamfering：OSB 2.4MPa, OST 2.4MPa, 2.45~2.55MPa of OSBE, OSTE
2.45~2.55MPa, 2.45~2.55MPa of OSBFX, 2.45~2.55MPa of OSTFX, 2.45~2.55MPa of OSBFL,
2.45~2.55MPa of OSTFL.
2. clear method for cleaning is leaked at the clear plate blank chamfering of elimination machine according to claim 1, it is characterised in that：The flame
The side burner of descaling machine is fixed on 241mm and highly located.
3. clear method for cleaning is leaked at the clear plate blank chamfering of elimination machine according to claim 1 or 2, it is characterised in that：It is described
The oxygen pressure of burner is at plate blank chamfering：OSB 2.4MPa、OST 2.4MPa、OSBE 2.5MPa、OSTE 2.5MPa、OSBFX
2.5MPa、OSTFX 2.5MPa、OSBFL 2.5MPa、OSTFL 2.5MPa。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710797669.1A CN107695479A (en) | 2017-09-06 | 2017-09-06 | Clear method for cleaning is leaked at the clear plate blank chamfering of elimination machine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710797669.1A CN107695479A (en) | 2017-09-06 | 2017-09-06 | Clear method for cleaning is leaked at the clear plate blank chamfering of elimination machine |
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| Publication Number | Publication Date |
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| CN107695479A true CN107695479A (en) | 2018-02-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710797669.1A Withdrawn CN107695479A (en) | 2017-09-06 | 2017-09-06 | Clear method for cleaning is leaked at the clear plate blank chamfering of elimination machine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112974753A (en) * | 2021-02-10 | 2021-06-18 | 鞍钢股份有限公司 | Online measurement and adjustment method for casting blank scalping amount of flame cleaning machine |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005313180A (en) * | 2004-04-27 | 2005-11-10 | Nippon Steel Corp | Hot scarfing device and hot scarfing method for slab |
| CN201253726Y (en) * | 2008-08-25 | 2009-06-10 | 中冶宝钢技术服务有限公司 | Gun head apparatus of flame cutting machine |
| CN201644985U (en) * | 2010-02-25 | 2010-11-24 | 宝钢集团新疆八一钢铁有限公司 | Corner defect cleaning device for continuous casting billet |
| CN102271852A (en) * | 2009-01-13 | 2011-12-07 | 新日本制铁株式会社 | Hot sgafing apparatus and method of hot scafing steel slab |
| CN102791401A (en) * | 2010-02-08 | 2012-11-21 | Posco公司 | Slab processing method and slab processing system |
| CN105848807A (en) * | 2013-12-23 | 2016-08-10 | Posco公司 | Slab scarfing apparatus and method for controlling same |
| CN106312239A (en) * | 2015-06-30 | 2017-01-11 | Posco公司 | Scarfing apparatus |
-
2017
- 2017-09-06 CN CN201710797669.1A patent/CN107695479A/en not_active Withdrawn
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005313180A (en) * | 2004-04-27 | 2005-11-10 | Nippon Steel Corp | Hot scarfing device and hot scarfing method for slab |
| CN201253726Y (en) * | 2008-08-25 | 2009-06-10 | 中冶宝钢技术服务有限公司 | Gun head apparatus of flame cutting machine |
| CN102271852A (en) * | 2009-01-13 | 2011-12-07 | 新日本制铁株式会社 | Hot sgafing apparatus and method of hot scafing steel slab |
| CN102791401A (en) * | 2010-02-08 | 2012-11-21 | Posco公司 | Slab processing method and slab processing system |
| CN201644985U (en) * | 2010-02-25 | 2010-11-24 | 宝钢集团新疆八一钢铁有限公司 | Corner defect cleaning device for continuous casting billet |
| CN105848807A (en) * | 2013-12-23 | 2016-08-10 | Posco公司 | Slab scarfing apparatus and method for controlling same |
| CN106312239A (en) * | 2015-06-30 | 2017-01-11 | Posco公司 | Scarfing apparatus |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112974753A (en) * | 2021-02-10 | 2021-06-18 | 鞍钢股份有限公司 | Online measurement and adjustment method for casting blank scalping amount of flame cleaning machine |
| CN112974753B (en) * | 2021-02-10 | 2022-10-18 | 鞍钢股份有限公司 | Online measurement and adjustment method for casting blank scalping amount of flame cleaning machine |
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