CN104169014A - Descaling system - Google Patents
Descaling system Download PDFInfo
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- CN104169014A CN104169014A CN201380013987.4A CN201380013987A CN104169014A CN 104169014 A CN104169014 A CN 104169014A CN 201380013987 A CN201380013987 A CN 201380013987A CN 104169014 A CN104169014 A CN 104169014A
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- water
- dissolved oxygen
- oxygen concentration
- descales
- descaling
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B45/04—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for de-scaling, e.g. by brushing
- B21B45/08—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for de-scaling, e.g. by brushing hydraulically
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
- Degasification And Air Bubble Elimination (AREA)
Abstract
Provided is a descaling system capable of removing scale more efficiently. The descaling devices (40, 50, 60) in the descaling system (1) have descaling nozzles (41, 51, 61) for spraying water on the surface of a steel plate (K) thereby removing scale formed on said surface. The descaling nozzles (41, 51, 61) are connected to pumps (70) that pressurize water from a water supply source (100) and spray water pressurized in the pumps (70) onto the surface of the steel plate (K). The entry side of the pumps (70) is provided with a de-aerating device (90) that reduces the dissolved oxygen concentration in the water to be delivered to the pumps (70) below the dissolved oxygen concentration in the raw water from the water supply source (100).
Description
Technical field
The present invention relates to for removing the system that descales of the oxide skin of surface of steel plate.
Background technology
On the rolling line of steel, steel are packed in the heating furnace of oxidizing atmosphere, and carry out hot rolling heat a few hours in the temperature province of common 1100～1300 ℃ after.When hot rolling, be created in once oxidation skin that when heating generate and at the secondary oxidation skin of generation from heating furnace is extracted out.If do not remove such oxide skin with regard to rolled steel, oxide skin is invaded the surface as the steel plate of product, forms scale defects and residual.This scale defects is damaged the surface texture of steel plate significantly, and when bending machining, becomes the starting point that crackle produces, and therefore product quality is had to great impact.
Therefore, as the method addressing this problem, proposition has following scheme: (1) is at steel surface coating anti-oxidation materials (for example, with reference to patent documentation 1), (2) heating-up temperature of steel is made as to the fusing point (about 1170 ℃) following (for example, with reference to patent documentation 2) of fayalite, (3) with complete non-oxidation state, be rolled (for example, with reference to patent documentation 3), (4) temperature in the temperature before rolling, rolling is made as to high temperature (about more than 1000 ℃), (5) remove the oxide skin of generation (for example, with reference to patent documentation 4) completely.
But the method for (1) has not only increased numerous and diverse coating operation, also the expense due to cost inorganic agent has improved manufacturing cost.In addition, the method for (2) is due to low-temperature heat steel, thus the burden of milling train increase, and due to the difference of steel type, from the specification of guaranteeing that the viewpoint existence of material behavior cannot be applicable.In addition, the method for (3) is because equipment cost is very large and unrealistic.In addition, the method for (4) is owing to extracting out from heating furnace with high temperature, so the former unit price of fuel increases, scale loss increases.
Therefore,, as ensuing solution, (5) remove this so-called countermeasure descaling completely by the oxide skin of generation is effective.The system that descales descaling is conventionally to the water of the jet surface high pressure of steel plate, and the impulsive force of the water by this injection is peeled off the oxide skin of steel plate remove.The system that descales that represents conventional example in Fig. 3.
The system that descales 101 shown in Fig. 3 possesses on the hot rolling line of steel plate: the first de-scaling device 140 that is called scale removal machine that goes out side (HSB) that is arranged at heating furnace 110; Be arranged at second de-scaling device 150 that enters side (RSB) of roughing mill 120; Be arranged at the 3rd de-scaling device 160 that enters side (FSB) of finishing mill 130.
The first de-scaling device 140 possesses a pair of descaling nozzle 141, and it is to the surface and the back spraying jetting that are rolled material (steel plate) K that take out from roughing mill 110, thus, and for removing the oxide skin forming at this surface and the back side.In addition, the second de-scaling device 150 possesses a pair of descaling nozzle 151, and it has been to having passed through the surface that is rolled material K and the back spraying jetting of the first de-scaling device 140, thus, and for removing the oxide skin forming at this surface and the back side.In addition, the 3rd de-scaling device 160 possesses a pair of descaling nozzle 161, and it has been to having passed through the surface that is rolled material K and the back spraying jetting of roughing mill 120, thus, and for removing the oxide skin forming at this surface and the back side.
Each descaling nozzle 141,151,161 is connected with a plurality of pumps 170 and accumulator 180 via pipe arrangement, and a plurality of pumps 170 are connected with water supply source 190.Water from water supply source 190 is pressurizeed and is stably held in high pressure by a plurality of pumps 170 and accumulator 180 on one side, on one side from each descaling nozzle 141,151,161 to the surface and the back side injection that are rolled material K.Utilize a plurality of pumps 170 and accumulator 180 stably to guarantee the spray volume of injection water.
Prior art document
Patent documentation
Patent documentation 1:(Japan) Unexamined Patent 1-249214 communique
Patent documentation 2:(Japan) examined patent publication 58-1167 communique
Patent documentation 3:(Japan) examined patent publication 60-15684 communique
Patent documentation 4:(Japan) No. 4084295 communique of patent
Summary of the invention
Invent problem to be solved
But, solution about above-mentioned (5), the technology that patent documentation 4 is recorded restudies the internal structure of the descaling nozzle that de-scaling device uses, following nozzle is disclosed: form there is the aperture (squit hole) of spray nozzle front end portion, from this aperture with the structure of the connected large-diameter portion in the He Yugai tapering, tapering of 30～80 ° of extensions of cone angle, and the ratio (D1/D2) with respect to the minor axis D2 in aperture is made as more than 3 by the internal diameter of large-diameter portion.
Therefore but the technology that patent documentation 4 is recorded is by the technology after the internal structure optimization of descaling nozzle in the past, there is the limit increasing substantially aspect the ability of descaling.
The present invention researches and develops in view of the above problems, and its object is, provides a kind of and can remove more efficiently the system that descales of descale.
For solving the scheme of problem
The inventor etc. pay close attention to such problem, for being provided, the system that descales of the steel plate that can remove more efficiently descale after repeatedly studying, notices the cavitation erosion (with reference to Fig. 4) that becomes drop, produces in steel plate scale surface from the jet water stream of descaling nozzle ejection.And the inventor etc. finds following situation, as shown in Figure 5, according to condition, much larger this phenomenon of impulsive force producing when the pressure ratio producing during bubble collapse that existence produces by cavitating and this droplet collision, if consider, can to described jet water stream, give cavitation erosion energetically, can improve the ability of descaling.Therefore, in the various systems that descale (in Fig. 3, by label 101, represented) in, implement to test and carried out research with keen determination, found that, if reduce the dissolved oxygen concentration comprising from the injection water of descaling nozzle 141,151,161 injections, the gaseousness that hinders impact wave propagation cavitates, and (bubble is difficult to disappear, produce the less cavitation erosion of pressure) reduce, and steam cavitation erosion (repeat to generate and disappear, produce the larger cavitation erosion of pressure) increases.
Therefore, the inventor etc. will spray common injection water (former water, dissolved oxygen concentration 5 * 10
-3g/l) ability of descaling time is made as 1, and evaluates the variation of the ability that descales while having sprayed the injection water that makes dissolved oxygen concentration variation contained in injection water.In Fig. 6, represent evaluation result.As can be seen from Figure 6, in injection, make dissolved oxygen concentration contained in injection water change to 7 * 10
-3g/l～0.5 * 10
-3during the injection water of g/l, the ability of descaling when spraying former water is made as 1, and the ability that descales changes to 2.5 times of degree from 0.9 times of degree.That is,, if be injected in the injection water that dissolved oxygen concentration contained in injection water is lower than former water, the energy force rate that descales becomes large while making injection water be former water.
Therefore, the inventor etc. arrange degasser by the side that enters at pump 170, make the contained dissolved oxygen concentration of injection water lower than dissolved oxygen concentration contained in former water, and invented, improve the ability that descales and can remove more efficiently the system that descales of descale.
(1) a kind of the descaling in system the present invention relates to, on the hot rolling line of steel plate, possesses the side that goes out that is arranged at heating furnace, the de-scaling device that enters at least one position in side that enters side and finishing mill of roughing mill, this de-scaling device has descaling nozzle, this descaling nozzle is for removing the oxide skin forming on this surface by the jet surface water to described steel plate, the pump that this descaling nozzle pressurizes with water to from water supply source is connected, water after the jet surface of described steel plate is pressurizeed by this pump, the described system of descaling is characterised in that, the side that enters at described pump arranges degasser, this degasser makes to be sent to dissolved oxygen concentration in the water of this pump, and recently the dissolved oxygen concentration in the former water of described water supply source is low.
(2) in addition, the system that descales of the present invention is on the basis of the system that descales of (1), it is characterized in that, described degasser makes to be sent to dissolved oxygen concentration in the water of the described pump dissolved oxygen concentration from the former water from described water supply source and is reduced to larger than 0g/l and is 1 * 10
-3below g/l.
(3) in addition, the system that descales of the present invention, on the basis of the system that descales of (1) or (2), is characterized in that, described degasser reduces the dissolved oxygen concentration in the water that is sent to described pump in vacuum outgas mode.
(4) in addition, the system that descales of the present invention, on the basis of the system that descales of (1) or (2), is characterized in that, described degasser reduces the dissolved oxygen concentration in the water that is sent to described pump in heat de-airing mode.
(5) in addition, the system that descales of the present invention, on the basis of the system that descales of (1) or (2), is characterized in that, described degasser reduces the dissolved oxygen concentration in the water that is sent to described pump in nitrogen blowing mode.
Invention effect
According to the system that descales of (1), in the side that enters of pump, degasser is set, this degasser make to be sent to dissolved oxygen concentration in the water of pump recently the dissolved oxygen concentration in the former water of water supply source reduce.Thus, can reduce the dissolved oxygen concentration the injection water of the jet surface from descaling nozzle to steel plate, can improve the ability of descaling, and can remove more efficiently descale.
In addition, according to the system that descales of (2), on the basis of the system that descales of recording in first aspect, described degasser makes to be sent to dissolved oxygen concentration in the water of the described pump dissolved oxygen concentration from the former water from described water supply source and is reduced to larger than 0g/l and is 1 * 10
-3below g/l.Thus, can make the dissolved oxygen concentration the injection water of the jet surface from descaling nozzle to steel plate be reduced to proper range, and can increase substantially the ability of descaling, and can remove more efficiently descale.Technical to be difficult to make this dissolved oxygen concentration be 0g/l, and therefore, this dissolved oxygen concentration is preferably large than 0g/l.On the other hand, when this dissolved oxygen concentration is than 1 * 10
-3when g/l is high, the raising degree of the ability that descales diminishes, and therefore, preferably this dissolved oxygen concentration is made as to 1 * 10
-3below g/l.
In addition, according to the system that descales of (3), (4) and (5), on the basis of the system that descales of (1), described degasser can reduce the dissolved oxygen concentration in the water that is sent to pump with vacuum outgas mode, heat de-airing mode, nitrogen blowing mode respectively.
Accompanying drawing explanation
Fig. 1 is the summary construction diagram that an example of the system that descales of the present invention is represented together with hot rolling line;
Fig. 2 means that the water droplet of the oxide skin of being undertaken by injection water in removing is to the key diagram of the collision model of steel plate;
Fig. 3 is the summary construction diagram that the system that descales of conventional example is represented together with hot rolling line;
Fig. 4 means the schematic diagram of the image of the situation that produces cavitation erosion when the jet water stream of descaling nozzle ejection becomes drop and collides with steel plate scale surface;
Fig. 5 be while being illustrated in the lump the bubble collapse that the cavitation erosion by shown in Fig. 4 produces, produce pressure situation image and near bubble radius and bubble, produce the figure of the relation between pressure while disappearing during bubble radius/generation;
Fig. 6 means the common injection water of injection (former water, dissolved oxygen concentration 5 * 10
-3g/l) ability of descaling time is made as 1 and evaluate to spray the curve map of result of the variation of the ability that descales while making injection water that dissolved oxygen concentration contained in injection water changes.
The specific embodiment
Below, with reference to accompanying drawing, embodiments of the present invention are described.Fig. 1 is the summary construction diagram that an example of the system that descales of the present invention is represented together with hot rolling line.
The system that descales 1 shown in Fig. 1 is arranged on the hot rolling line of steel plate.In hot rolling line, from upstream side downstream side possess: heating is rolled the heating furnace 10 of material (steel plate) K; To the roughing mill 20 that material K carries out roughing that is rolled taking out from heating furnace 10; And to the finishing mill 30 that material K carries out finish rolling that is rolled after roughing.
At this, the system that descales 1 possesses on the hot rolling line of steel plate: the first de-scaling device 40 that is called scale removal machine that goes out side (HSB) that is arranged at heating furnace 10; Be arranged at second de-scaling device 50 that enters side (RSB) of roughing mill 20; Be arranged at the 3rd de-scaling device 60 that enters side (FSB) of finishing mill 30.
The first de-scaling device 40 possesses a pair of descaling nozzle 41, and this pair of descaling nozzle 41 is removed the oxide skin in this surface and back side formation for the surface that is rolled material K by taking out from heating furnace 10 and back spraying jetting.In addition, the second de-scaling device 50 possesses a pair of descaling nozzle 51, and this pair of descaling nozzle 51 is for by removing to having passed through the surface that is rolled material K of the first de-scaling device 40 and back spraying jetting the oxide skin forming at this surface and the back side.In addition, the 3rd de-scaling device 60 possesses a pair of descaling nozzle 61, and this pair of descaling nozzle 61 is for by removing to having passed through the surface that is rolled material K of roughing mill 20 and back spraying jetting the oxide skin forming at this surface and the back side.
A plurality of pumps 70 and accumulator 80 that each descaling nozzle 41,51,61 pressurizes with water to from water supply source 100 via pipe arrangement are connected.Water from water supply source 100 is pressurizeed and is stably held in high pressure by a plurality of pumps 70 and accumulator 80 on one side, on one side from each descaling nozzle 41,51,61 to the surface and the back side injection that are rolled material K.Utilize a plurality of pumps 170 and accumulator 180 stably to guarantee the spray volume of injection water.
At this, in the side that enters of a plurality of pumps 70, be that the side that of water supply source 100 is provided with degasser 90, this degasser 90 make to send into dissolved oxygen concentration in the water of a plurality of pumps 70 recently the dissolved oxygen concentration in the former water of water supply source 100 reduce.As degasser 90, can use vacuum outgas mode, but also can reduce the dissolved oxygen concentration in the water of sending into a plurality of pumps 70 by heat de-airing mode, nitrogen blowing mode.The side that goes out at degasser 90 is provided with dissolved oxygen instrument 91.
Like this, the side that enters at a plurality of pumps 70 arranges the degasser 90 that reduces the dissolved oxygen concentration in the water that is sent to a plurality of pumps 70, therefore, the dissolved oxygen concentration that utilizes degasser 90 to reduce the former water transporting from water supply source 100, and reduce the dissolved oxygen concentration in the water that is sent to a plurality of pumps 70.Thus, can reduce from each pump 70 to each descaling nozzle 41,51,61, from each descaling nozzle 41,51,61 to the dissolved oxygen concentration being rolled the injection water of the surface of material K and the jet surface at the back side, therefore, the ability of descaling can be improved, and descale can be removed more efficiently.That is, reduce from each descaling nozzle 41,51,61 to the dissolved oxygen concentration being rolled the injection water of the surface of material K and the jet surface at the back side.Thus, the gaseousness that can reduce the propagation that hinders shock wave (with reference to Fig. 4) cavitates, and (bubble is difficult to disappear, produce the less cavitation erosion of pressure), increasing steam cavitation erosion (repeats to generate and disappear, produce the larger cavitation erosion of pressure), and increase the pressure producing when bubble collapse produces.Thus, can improve the ability of descaling.
How many for utilizing degasser 90 to make to be sent to dissolved oxygen concentration in the water of a plurality of pumps 70 to reduce, preferably make to send into dissolved oxygen concentration in the water of a plurality of pumps 70 dissolved oxygen concentration from the former water from water supply source 100 and (be generally 5 * 10
-3g/l degree) be reduced to larger than 0g/l and be 1 * 10
-3below g/l.When making this dissolved oxygen concentration be reduced to 1 * 10
-3during g/l, with respect to completely not degassed state, (be generally 5 * 10
-3g/l degree) the ability that descales, the ability of descaling becomes 2 times.Therefore, by making this dissolved oxygen concentration be reduced to above-mentioned scope, can make to the dissolved oxygen concentration being rolled the surface of material K and the injection water of back side injection, to be reduced to proper range from each descaling nozzle 41,51,61, and can increase substantially the ability of descaling, and can remove more efficiently descale.Technical to be difficult to make this dissolved oxygen concentration be 0g/l, and therefore, preferably this dissolved oxygen concentration is larger than 0g/l.On the other hand, when this dissolved oxygen concentration is than 1 * 10
-3when g/l is high, the raising degree of the ability that descales diminishes, and therefore, preferably this dissolved oxygen concentration is made as to 1 * 10
-3below g/l.
Above, embodiments of the present invention have been described, but the present invention is not limited to this, can carries out various changes, improvement.
For example, for the dissolved oxygen concentration that makes to be sent in the water of a plurality of pumps 70, reduce how many, as long as make to be sent to dissolved oxygen concentration in the water of a plurality of pumps 70, with respect to the dissolved oxygen concentration of the state in the former water from water supply source 100, slightly reduce, the dissolved oxygen concentration that also can make to be sent to dissolved oxygen concentration in the water of a plurality of pumps 70 state from the former water from water supply source 100 (is generally 5 * 10
-3g/l degree) be reduced to larger than 0g/l and be 1 * 10
-3below g/l.
In addition, on the hot rolling line of steel plate, as long as de-scaling device is arranged at least one position in side that enters that enters side and finishing mill 30 that goes out side, roughing mill 20 of heating furnace 10, also can be arranged at all positions.
In addition, the number of units of pump 70 does not need for many, can be 1 yet.
In addition, dissolved oxygen instrument 91 also can not be arranged at the side that of degasser 90, in order to manage degassed front dissolved oxygen concentration, also can be arranged at the side that enters of degasser 90.
Embodiment
In order to verify effect of the present invention, by the system that descales 1 of the inventive example shown in Fig. 1 and the system that descales 101 of the comparative example shown in Fig. 3, to being rolled material K injection water, and the ability of descaling is now evaluated.
In the inventive example, degasser 90 uses the diaphragm type vacuum degasser of having applied gas separation membrane, in the side that goes out of this degasser 90, is provided with dissolved oxygen instrument (DO instrument) 91.And, utilize the dissolved oxygen concentration (5 * 10 of degasser 90 from former water
-3g/l) be reduced to 1 * 10
-3g/l.
On the other hand, in comparative example, degasser 90 is not set, therefore, will there is the dissolved oxygen concentration (5 * 10 of former water state
-3g/l) water is delivered in a plurality of pumps 70.
As the steel that are rolled material K, use following steel: on-gauge plate is wide is 1.2m, standard thickness of slab is that the side (HSB) that of heating furnace 10 is 220mm, and the side (RSB) that enters of roughing mill 20 is 220～70mm, and the side (FSB) that enters of finishing mill 30 is 60～40mm.
As evaluation method, use the previously presented merit rating model that descales (with reference to No. 3129967 communique of patent) to evaluate.That is the total impulsive force (F) and the unit impulsive force (S) that in the time of, can colliding by injection water and steel surface as the ability of descaling of evaluation result, produce are evaluated.Fig. 2 means that the water droplet of the oxide skin of being undertaken by injection water in removing is to the figure of the collision model of steel collision.In the figure, total impulsive force (F) and unit impulsive force (S) can represent by following formula.
F＝P0×a×C×(3/d)×α×t
S＝F/A
Wherein, F: total impulsive force [N] of the injected water on surface of steel plate, S: the unit impulsive force [Pa] of the injected water on surface of steel plate, P0: expulsion pressure [Pa], a: orifice area [m
2], C: velocity of sound [m/s], d: the particle diameter of water droplet [m], α: coefficient, t: the time that shock wave is propagated in drop [s].
In table 1, represent evaluation result.
[table 1]
As seen from Table 1, utilize degasser 90 from the dissolved oxygen concentration (5 * 10 of the state of former water
-3g/l) be reduced to 1 * 10
-3g/l, thus, is the situation of former water with respect to making injection water, and the ability of descaling is increased to 2 times, and with respect to comparative example, the generation rate of the bad quality that in the inventive example, the ability of descaling causes also can be reduced to and be less than 10%.
In addition, known when with reference to Fig. 6, as the first aspect of invention, when the dissolved oxygen concentration (5 * 10 that utilizes degasser 90 from the state of former water
-3while g/l) reducing dissolved oxygen concentration, descaling, can force rate to make injection water be that the situation of former water becomes large.
In addition, known when with reference to Fig. 6, as the second aspect of invention, the dissolved oxygen concentration (5 * 10 of the dissolved oxygen concentration in making injection water from former water
-3g/l) be reduced to larger than 0g/l and be 1 * 10
-3when g/l is following, with respect to making injection water, be the situation of former water, the ability of descaling becomes more than 2 times.
Label declaration
1 system that descales
10 heating furnaces
20 roughing mills
30 finishing mills
40 first de-scaling devices
41 descaling nozzles
50 second de-scaling devices
51 descaling nozzles
60 the 3rd de-scaling devices
61 descaling nozzles
70 pumps
80 accumulators
90 degassers
100 water supply sources
K is rolled material (steel plate)
Claims (5)
1. the system that descales, on the hot rolling line of steel plate, possesses the de-scaling device that enters at least one position in side that enters side and finishing mill that goes out side, roughing mill that is arranged at heating furnace, this de-scaling device has descaling nozzle, this descaling nozzle is for removing the oxide skin forming on this surface by the jet surface water to described steel plate, the pump that this descaling nozzle pressurizes with water to from water supply source is connected, water after the jet surface of described steel plate is pressurizeed by this pump, the described system of descaling is characterised in that
The side that enters at described pump arranges degasser, and this degasser makes to be sent to dissolved oxygen concentration in the water of this pump, and recently the dissolved oxygen concentration in the former water of described water supply source is low.
2. the system that descales according to claim 1, is characterized in that, described degasser makes to be sent to dissolved oxygen concentration in the water of the described pump dissolved oxygen concentration from the former water from described water supply source and is reduced to larger than 0g/l and is 1 * 10
-3below g/l.
3. the system that descales according to claim 1 and 2, is characterized in that, described degasser reduces the dissolved oxygen concentration in the water that is sent to described pump in vacuum outgas mode.
4. the system that descales according to claim 1 and 2, is characterized in that, described degasser reduces the dissolved oxygen concentration in the water that is sent to described pump in heat de-airing mode.
5. the system that descales according to claim 1 and 2, is characterized in that, described degasser reduces the dissolved oxygen concentration in the water that is sent to described pump in nitrogen blowing mode.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2012-054632 | 2012-03-12 | ||
| JP2012054632A JP5739367B2 (en) | 2012-03-12 | 2012-03-12 | Descaling system |
| PCT/JP2013/001456 WO2013136734A1 (en) | 2012-03-12 | 2013-03-07 | Descaling system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104169014A true CN104169014A (en) | 2014-11-26 |
| CN104169014B CN104169014B (en) | 2016-03-23 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201380013987.4A Active CN104169014B (en) | 2012-03-12 | 2013-03-07 | Descale system |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JP5739367B2 (en) |
| KR (1) | KR101624448B1 (en) |
| CN (1) | CN104169014B (en) |
| IN (1) | IN2014KN01674A (en) |
| WO (1) | WO2013136734A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR3064279B1 (en) | 2017-03-22 | 2020-06-26 | Fives Stein | METHOD AND DEVICE FOR COOLING A STRIP OF STEEL THROUGHOUT A COOLING SECTION OF A CONTINUOUS LINE |
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| KR200436513Y1 (en) * | 2006-10-31 | 2007-08-31 | 한국전력공사 | A Compact Type High Efficient System for Dissolved Oxygen Removal |
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2012
- 2012-03-12 JP JP2012054632A patent/JP5739367B2/en active Active
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- 2013-03-07 IN IN1674KON2014 patent/IN2014KN01674A/en unknown
- 2013-03-07 WO PCT/JP2013/001456 patent/WO2013136734A1/en active Application Filing
- 2013-03-07 CN CN201380013987.4A patent/CN104169014B/en active Active
- 2013-03-07 KR KR1020147026443A patent/KR101624448B1/en active IP Right Grant
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| CN1775399A (en) * | 2005-12-09 | 2006-05-24 | 广东韶钢松山股份有限公司 | High-pressure water descaling system |
| JP2007260550A (en) * | 2006-03-28 | 2007-10-11 | Jfe Steel Kk | Combined nozzle and steel surface treatment methodl |
| CN101559439A (en) * | 2009-05-26 | 2009-10-21 | 广州金关节能科技发展有限公司 | Energy-saving control method for multi-section descaling and control device thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2013136734A1 (en) | 2013-09-19 |
| KR20140127349A (en) | 2014-11-03 |
| JP2013188756A (en) | 2013-09-26 |
| IN2014KN01674A (en) | 2015-10-23 |
| JP5739367B2 (en) | 2015-06-24 |
| KR101624448B1 (en) | 2016-05-25 |
| CN104169014B (en) | 2016-03-23 |
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