WO2020119204A1 - Dispositif de refroidissement par pulvérisation apte à perfectionner la planéité d'une bande - Google Patents

Dispositif de refroidissement par pulvérisation apte à perfectionner la planéité d'une bande Download PDF

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Publication number
WO2020119204A1
WO2020119204A1 PCT/CN2019/106447 CN2019106447W WO2020119204A1 WO 2020119204 A1 WO2020119204 A1 WO 2020119204A1 CN 2019106447 W CN2019106447 W CN 2019106447W WO 2020119204 A1 WO2020119204 A1 WO 2020119204A1
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WO
WIPO (PCT)
Prior art keywords
strip
spray
nozzle
nozzles
cooling device
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Application number
PCT/CN2019/106447
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English (en)
Chinese (zh)
Inventor
黎浩
卢禹龙
田莺
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中冶南方工程技术有限公司
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Publication of WO2020119204A1 publication Critical patent/WO2020119204A1/fr

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    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
    • C21D9/54—Furnaces for treating strips or wire
    • C21D9/56—Continuous furnaces for strip or wire
    • C21D9/573—Continuous furnaces for strip or wire with cooling
    • C21D9/5735—Details
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/26—Methods of annealing
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/0062—Heat-treating apparatus with a cooling or quenching zone

Definitions

  • the invention belongs to the technical field of metallurgy, in particular to the technical field of metal strip annealing, in particular to a spray cooling device capable of improving the strip shape.
  • the outlet of the annealing furnace is usually equipped with a water spray cooler.
  • the water spray cooler is equipped with different numbers of nozzles. The pressurized cooling water passes through the nozzles on the nozzles to produce an atomized jet of a certain shape to cool the metal strip to a temperature that meets the process requirements.
  • the shape of the metal strip deteriorates after a series of annealing processes in the annealing furnace, and the most common of these is the edge wave of the strip.
  • the undulation degree of the side waves is usually quantified by the degree of emergency, such as 0.8%, 1.2%, etc., and it is divided into 1/4 waves and 1/8 waves according to the location of the waves.
  • it is often necessary to adjust the heating method of the annealing furnace and the cooling method of the protective gas circulation jet cooling section. Due to the cumbersome process of adjusting the heating and cooling methods of the annealing furnace, it will reduce production efficiency and increase energy consumption to a certain extent.
  • the embodiment of the invention relates to a spray cooling device capable of improving the strip plate shape, and can at least solve some defects of the prior art.
  • An embodiment of the present invention relates to a spray cooling device capable of improving the strip shape of a strip, including a plurality of lateral nozzles arranged in sequence along the strip running direction, and the axial direction of each lateral nozzle is perpendicular to the strip running direction ,
  • Each of the lateral nozzles has a plurality of central nozzles arranged along its own axis, and further includes two sets of longitudinal nozzles, and the two groups of the longitudinal nozzles are arranged in the lateral nozzles along the axial direction of the lateral nozzles
  • the longitudinal nozzle is axially parallel to the running direction of the strip, and a plurality of side nozzles are arranged on the longitudinal nozzle along its own axis.
  • each of the transverse nozzles includes a plurality of narrow-width nozzles for normal spraying and a plurality of wide-width nozzles for improving 1/4 side waves of the strip, and the width
  • the web nozzles are alternately arranged with the narrow web nozzles.
  • the number of middle nozzles on the wide nozzle is two more than the number of middle nozzles on the narrow nozzle, and the arrangement distance of the nozzles on the wide nozzle is different from that of the narrow nozzle
  • the nozzles on the nozzle are arranged at the same pitch.
  • the longitudinal nozzle is rotatably installed and the axis of the rotating shaft is parallel to the running direction of the strip.
  • the spray cooling device capable of improving the strip plate shape further includes a spray tank having a strip inlet and a strip outlet and at the strip inlet and the strip outlet A strip running channel is formed between them, and each of the transverse nozzles and each of the longitudinal nozzles are installed in the spray tank.
  • a return port is provided at the bottom of the spray tank and a filter structure is provided at the return port.
  • each of the lateral nozzles includes a nozzle body for installing a corresponding nozzle and a nozzle sleeve installed on the shower tank, and the nozzle body is detachably mounted on the In the nozzle sleeve, an overflow channel is provided in the nozzle sleeve to allow the corresponding nozzle jet to pass through.
  • a movable flange is provided on the nozzle body and a fixed flange is provided at the corresponding end of the nozzle sleeve, the movable flange is located outside the fixed flange and passes The bolt is connected with the fixed flange, and the fixed flange is fixedly connected with the spray groove.
  • the bolt holes on the movable flange are arc-shaped holes, and the circle where each arc-shaped hole is located is coaxial with the nozzle body.
  • each of the spray pipe sleeves can be detachably installed on the spray tank.
  • the spray cooling device provided by the present invention can obtain different spray cooling coverage widths by setting longitudinal spray pipes and cooperating with the horizontal spray pipes, so that the corresponding spray width can be selected according to production conditions, at least, appearing in the strip When the 1/8 edge wave is turned on, the longitudinal nozzle is opened for auxiliary spraying.
  • the different cooling rates on the strip will produce different deformation rates under the action of large tension, so that the edge wave on the strip can be finally reduced or eliminated Therefore, the strip shape can be improved.
  • Embodiment 1 is a schematic structural view of a spray cooling device according to Embodiment 1 of the present invention from a perspective;
  • Embodiment 1 of the present invention is a schematic structural view of the spray cooling device provided in Embodiment 1 of the present invention from another perspective;
  • FIG. 3 is a schematic diagram of a narrow-spray spray cooling working mode of a spray cooling device according to Embodiment 1 of the present invention.
  • FIG. 4 is a schematic diagram of a wide spray cooling working mode of a spray cooling device according to Embodiment 1 of the present invention.
  • FIG. 5 is a schematic diagram of a full-scale spray cooling working mode of the spray cooling device provided in Embodiment 1 of the present invention.
  • FIG. 6 is a schematic diagram of an arrangement structure of an injection pipe provided by Embodiment 2 of the present invention.
  • FIG. 7 is a side view of the movable flange provided by Embodiment 2 of the present invention.
  • an embodiment of the present invention provides a spray cooling device capable of improving the strip shape, which includes a plurality of lateral nozzles 2 arranged in sequence along the strip running direction, each of the lateral nozzles 2
  • the axial direction is perpendicular to the running direction of the strip, and each of the transverse nozzles 2 has a plurality of central nozzles arranged along its own axial direction.
  • the axial direction of the transverse nozzle 2 is horizontal, which is perpendicular to the strip running direction, that is, parallel to the width direction of the strip; generally, the above transverse nozzle 2 is provided above and below the strip running channel To spray the upper and lower surfaces of the strip.
  • the spray cooling device further includes two sets of longitudinal nozzles 3, and the two sets of the longitudinal nozzles 3 are arranged in the lateral nozzles 2 along the axial direction of the lateral nozzles 2
  • the longitudinal nozzle 3 is axially parallel to the strip running direction, and a plurality of side nozzles are arranged on the longitudinal nozzle 3 along its own axis.
  • the axial direction of the longitudinal nozzle 3 is horizontal, which is parallel to the running direction of the strip, that is, parallel to the length direction of the strip.
  • each group of longitudinal nozzles 3 includes an upper longitudinal nozzle 3 and a lower longitudinal nozzle 3, which are used to respectively perform the upper and lower surfaces of the strip edges Spraying; generally, the two sides of the horizontal nozzle 2 are the operating side and the transmission side, respectively, a vertical nozzle 3 is arranged above and below the operating side, and a longitudinal nozzle 3 is arranged above and below the transmission side, respectively.
  • the spray cooling device provided in this embodiment can obtain different spray cooling coverage widths by setting the longitudinal spray pipe 3 and cooperating with the horizontal spray pipe 2, so that the corresponding spray width can be selected according to the production situation, at least, in When the 1/8 edge wave occurs on the strip, the longitudinal nozzle 3 is turned on for auxiliary spraying.
  • the different cooling rates on the strip will produce different deformation rates under the action of large tension, so that the side wave on the strip can be finalized. Reduced or eliminated, so the strip shape can be improved.
  • the above-mentioned spray cooling device capable of improving the strip plate shape further includes a spray tank 1 having a strip inlet and a strip outlet, and between the strip inlet and the strip outlet A strip running channel is formed between each, and each of the lateral nozzles 2 and each of the longitudinal nozzles 3 are installed in the spray tank 1. Further, a backflow port 11 is provided at the bottom of the spray tank 1 and a filter structure 12 is provided at the backflow port 11, the filter structure 12 may use a filter net or the like; the bottom of the spray tank 1 is preferably provided as a cone Bucket shape, easy to collect spray liquid.
  • each of the transverse nozzles 2 includes a plurality of narrow-width nozzles 21 for normal spraying and a plurality of wide-width nozzles for improving 1/4 side waves of the strip Nozzle 22, and the wide nozzle 22 and the narrow nozzle 21 are alternately arranged, that is, there is a narrow nozzle 21 between every two adjacent wide nozzles 22, and every two adjacent narrow nozzles There is a wide nozzle 22 between the nozzles 21.
  • the working mode of the shower cooling device can effectively reduce or eliminate the side waves and other defects on the strip. specifically:
  • each wide-width nozzle 22 is turned on, and each narrow-width nozzle 21 is closed.
  • the spray cooling device works in the wide-spray cooling mode
  • the spray cooling device works in full-spray cooling mode.
  • different strip cooling rates can also be obtained, which can be applied to the annealing production of steel types required for different cooling rates/annealing rates.
  • a certain number of wide-spray nozzles 22 can be opened correspondingly according to process adjustment or fluctuation to achieve the desired spray cooling speed.
  • the middle nozzle arrangement on the wide nozzle 22 and the middle nozzle arrangement on the narrow nozzle 21 are easily determined by those skilled in the art.
  • each side of the centerline of the unit The strip width is D
  • the coordinate of the strip edge on the drive side is -D
  • the coordinate on the strip edge of the operation side is D
  • the spray coverage of the wide nozzle 22 From -3/4D to 3/4D, the spray coverage of the narrow nozzle 21 is selected within the spray coverage of the wide nozzle 22 according to actual operating conditions, for example, -3/5D to 3/5D.
  • the arrangement position of the middle nozzle on the wide nozzle 22 is the same as the arrangement position of the middle nozzle on the narrow nozzle 21, and the nozzle arrangement interval on the wide nozzle 22 is narrow and narrow.
  • the arrangement intervals of the nozzles on the web nozzle 21 are the same, but the number of central nozzles on the wide nozzle 22 is two more than the number of central nozzles on the narrow nozzle 21, which can meet the existing production requirements.
  • the spray coverage of each of the above-mentioned transverse nozzles 2 is the same, and the longitudinal nozzle 3 is rotatably installed and the axis of the rotating shaft is parallel to the strip running direction.
  • the spray width can simultaneously cover the 1/8 edge wave appearance position and the 1/4 edge wave appearance position of the strip.
  • the structure is simple and easy to operate, which can reduce equipment investment and maintenance costs.
  • the rotation of the longitudinal nozzle 3 can be realized by a conventional rotation driving device such as a motor+reducer, or can be manually driven.
  • the longitudinal nozzle 3 is fixed on the spray tank 1 by means of flange connection, and the screw holes on the flange are arc-shaped holes, and the arc-shaped
  • the nozzle 3 is coaxial, that is, the circular arc-shaped holes are arranged annularly with respect to the axis of the longitudinal nozzle 3, based on this structure, the flange of the longitudinal nozzle 3 can be allowed to rotate a certain angle relative to the spray tank 1, that is, the longitudinal direction is allowed
  • the spray pipe 3 rotates at a certain angle relative to the spray tank 1 to realize the change of the spray position of the longitudinal spray pipe 3.
  • Each spray pipe extends out of the spray tank 1 and is connected to the liquid inlet pipe 5 (which can be connected by a quick-change joint 4).
  • Each liquid inlet pipe 5 is provided with a control valve 6 and is connected to the liquid collecting main pipe 7.
  • the control valve 6 may be a manual valve or an automatic control valve such as a solenoid valve.
  • This embodiment provides an on-line replaceable spray pipe, which can be used in the above-mentioned first embodiment as a horizontal spray pipe, and of course, can also be used as a vertical spray pipe.
  • the spray pipe includes a nozzle body 201, and the nozzle body 201 is provided with a plurality of nozzles.
  • the nozzles are arranged in sequence along the axial direction of the nozzle body 201, and each nozzle The injection direction is the same, such as all upward or downward injection.
  • One end of the nozzle body 201 is a liquid inlet end for connecting to the liquid inlet pipe 5, the other end is a non-liquid inlet end and is generally in a closed state, and the liquid entering the pipe is ejected from each nozzle.
  • the spray pipe further includes a spray pipe sleeve 202 for mounting on the above-mentioned spray tank, the spray pipe body 201 is detachably installed in the spray pipe sleeve 202, and is mounted on the spray pipe sleeve 202
  • the upper opening is provided with an overflow channel that can allow jets of each nozzle to pass through.
  • the spray pipe provided in this embodiment is provided with a spray pipe sleeve 202, when the spray pipe needs to be cleaned and maintained, after the liquid supply is suspended, the spray pipe body 201 can be removed from the spray pipe sleeve 202, and the cleaning is completed. After that, install the nozzle body 201 into the nozzle sleeve 202.
  • the nozzle sleeve 202 can prevent the nozzle body 201 from contacting the strip during the maintenance process. The entire maintenance process does not affect normal production, so it can be achieved without Shutdown online to maintain the spray tube, effectively improve production efficiency, can avoid the nozzle and strip scraping, thereby improving the yield rate and extending the service life of the spray tube.
  • connection methods such as screw connection, wedge connection, snap connection, etc. may be used, and the specific structure is not shown here.
  • a movable flange 203 is provided on the nozzle body 201 and a fixed flange 204 is provided on the corresponding end of the nozzle sleeve 202.
  • the movable flange 203 is located outside the fixed flange 204 and is connected to the fixed flange 204 by bolts; the detachable connection structure between the movable flange 203 and the fixed flange 204 realizes the nozzle body 201 and
  • the detachable connection structure between the nozzle sleeves 202 is simple in structure, stable and reliable in connection structure, easy to manufacture and realize, and can be used for the modification of the existing nozzle.
  • the movable flange 203 may be provided at the liquid inlet end of the nozzle body 201, or may be provided between the liquid inlet end of the nozzle body 201 and the nozzle, and the liquid inlet end is located outside the movable flange 203 to facilitate the connection with the liquid inlet pipe 5.
  • the outer side of the fixed flange 204 is the side away from the lumen of the nozzle sleeve 202, and the nozzle body 201 passes through the central through hole of the fixed flange 204 and enters the nozzle sleeve 202,
  • the movable flange 203 on the nozzle body 201 is blocked by the fixing flange 204 and fits with the fixing flange 204, and the two can be connected by bolts.
  • the diameter of the central through hole of the fixing flange 204 may be set to be greater than the sum of the outer diameter of the nozzle body 201 and the exposed length of the nozzle.
  • the diameter of the central through hole of the fixed flange 204 is approximately the same as the outer diameter of the nozzle body 201, which can improve the structural stability of the nozzle body 201 during the injection process, and the tube body vibrates/sloshing Smaller, and in order to facilitate the passage of the nozzle, an escape groove corresponding to the central through hole is correspondingly formed on the fixed flange 204, the escape groove extends radially along the fixed flange 204 and the extension length and groove width can fully allow the nozzle to pass through can.
  • the bolt holes on the movable flange 203 are arc-shaped holes, and the circle where each arc-shaped hole is located is coaxial with the nozzle body 201, that is, each arc-shaped
  • the holes are arranged annularly with respect to the axis of the nozzle body 201.
  • the movable flange 203 can be allowed to rotate a certain angle relative to the fixed flange 204, that is, the nozzle body 201 can be allowed to rotate a certain angle relative to the nozzle sleeve 202. Therefore, the spray angle of the nozzle can be adjusted according to the spraying needs, and the application range of the process can be widened.
  • the circular arc-shaped hole is preferably a waist-shaped hole.
  • the above-mentioned flow channel can be a continuous large opening, and the opening area should be able to cover the injection range of each nozzle at the nozzle sleeve 202;
  • a plurality of flow holes are formed in the nozzle sleeve 202.
  • the number of the flow holes and the nozzles are the same and are arranged one by one.
  • the area of the flow holes can ensure that the nozzle jet passes completely.
  • the above flow channel should be able to be covered accordingly without affecting the flow or velocity of the nozzle jet.
  • the structure of the arc slot can be used, the length corresponding It suffices to cover the rotation angle of the nozzle body 201.
  • the non-inlet end of the nozzle body 201 is preferably connected with the nozzle sleeve 202 as a whole, so that the vibration generated on the nozzle body 201 can be more stably transmitted to the nozzle sleeve 202, Improve the working stability of the jet of the injection tube; for example, the two can be a detachable structure such as screw connection and clamping connection.
  • the two can be a detachable structure such as screw connection and clamping connection.
  • the end of the nozzle sleeve 202 away from the inlet end of the nozzle body 201 (that is, the above-mentioned liquid inlet end) is provided with a positioning plug 206, and the nozzle body 201 is inserted in The positioning plug 206; wherein, the non-liquid inlet end of the nozzle body 201 may be a self-closing structure, that is, a nozzle plug 208 is provided, or it may be a through end and blocked by the positioning plug 206.
  • a positioning plug 207 is provided on the nozzle body 201, the positioning plug 207 is pluggable connected to the positioning plug 206, the positioning plug 207 is fixedly fixed on the nozzle body 201 The non-liquid inlet end is connected to the positioning plug 206 to improve the sealing performance.
  • the positioning plug 207 is a tapered plug
  • the inner wall of the positioning wire plug 206 corresponds to a different diameter hole and closely fits with the outer wall of the positioning plug 207
  • the different diameter hole is also a self-positioning wire
  • the opening end of the plug 206 is toward its inner side, and the diameter of the annular inner wall of the positioning plug 206 is sequentially reduced, and it is in the form of a truncated cone that tapers from the outside to the inside. It can closely contact with the positioning plug 207 of the conical plug type, effectively improving Sealing performance.
  • the above-mentioned reduced-diameter hole includes a tapered section and an equal-diameter section.
  • the equal-diameter section is used to cooperate with the nozzle plug 208
  • the tapered section is used to cooperate with the positioning plug 207.
  • the positioning plug 207 is a compressibly deformable plug body, and a limiting snap ring 205 is provided on the nozzle body 201, and the limiting snap ring 205 is located on the positioning plug 207.
  • the side close to the entrance end of the nozzle body 201 is in contact with the positioning plug 207.
  • the positioning plug 207 can be compressed and deformed to more closely contact the positioning plug 206.
  • the limiting snap ring 205 can limit the positioning plug 207, which is preferably welded on the nozzle body 201, and the positioning plug 207 is preferably sleeved on the nozzle body 201 and is connected with the limiting card
  • the ring 205 is fixedly connected, such as bonding.
  • Each nozzle body 201 preferably extends out of the nozzle sleeve 202 and is connected to the liquid inlet pipe 5 (which can be connected by a quick-change joint 4).
  • Each liquid inlet pipe 5 is provided with a control valve 6 and is connected to the liquid collecting header 7 connection.
  • each of the nozzle sleeves 202 can be detachably installed on the spray tank 1. During the shutdown of the unit, when the maintenance and repair of the spray tank 1 is required, close the control valves for safety 6. Pull out the nozzle casing 202 and the nozzle body 201 as a whole from the shower tank 1, so as to obtain enough space for maintenance.
  • the nozzle sleeve 202 is detachably threaded and fixed on one side wall of the spray tank 1, for example, screw connection, tenon joint and other detachable installation methods can also be adopted; for the above, the nozzle sleeve 202 is fixed
  • the structure of the flange 204 is preferably further detachably mounted on the groove wall of the spray tank 1 through the fixed flange 204, that is, in addition to the first bolt hole ring connected to the movable flange 203 on the fixed flange 204 There is also a second bolt hole ring connected to the groove wall of the spray tank 1.
  • the end of the sleeve of the nozzle sleeve 202 in the spray tank 1 is supported on the support member 13 on the inner wall of the other side of the spray tank 1, which ensures the stability of the overall installation structure, and can be more
  • the vibration of the nozzle body 201 is transmitted to the shower tank 1 well.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Nozzles (AREA)

Abstract

La présente invention concerne un dispositif de refroidissement par pulvérisation apte à perfectionner la planéité d'une bande. Le dispositif de refroidissement par pulvérisation comprend une pluralité de tubes de pulvérisation latéraux disposés successivement le long d'une direction de déplacement d'une bande. La direction axiale de chaque tube de pulvérisation latéral est perpendiculaire à la direction de déplacement de la bande. Une pluralité de buses intermédiaires sont disposées sur chaque tube de pulvérisation latéral le long de leur direction axiale. Le dispositif de refroidissement par pulvérisation comprend en outre deux groupes de tubes de pulvérisation longitudinaux. Les deux groupes de tubes de pulvérisation longitudinaux sont disposés sur deux côtés des tubes de pulvérisation latéraux le long de la direction axiale des tubes de pulvérisation latéraux, et les tubes de pulvérisation longitudinaux sont axialement parallèles à la direction de déplacement de la bande. Une pluralité de buses latérales sont disposées sur les tubes de pulvérisation longitudinaux le long de leurs directions axiales. De par l'agencement des tubes de pulvérisation longitudinaux pour coopérer avec des tubes de pulvérisation latéraux, différentes largeurs d'application du refroidissement par pulvérisation peuvent être obtenues, de sorte qu'une largeur de pulvérisation correspondante puisse être sélectionnée en fonction d'une condition de production. Les tubes de pulvérisation longitudinaux sont au moins actionnés pour effectuer une pulvérisation auxiliaire lorsque la bande présente 1/8 d'ondes de surface. Différentes vitesses de refroidissement sur la bande provoquent des taux de déformation différents sous l'action d'une grande tension, de sorte que les ondes de surface sur la bande soient finalement réduites ou éliminées, et ainsi la planéité de la bande peut être perfectionnée.
PCT/CN2019/106447 2018-12-12 2019-09-18 Dispositif de refroidissement par pulvérisation apte à perfectionner la planéité d'une bande WO2020119204A1 (fr)

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CN201811517429.2A CN109439883A (zh) 2018-12-12 2018-12-12 能改善带材板形的喷淋冷却装置
CN201811517429.2 2018-12-12

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CN109439883A (zh) * 2018-12-12 2019-03-08 中冶南方工程技术有限公司 能改善带材板形的喷淋冷却装置
CN209333996U (zh) * 2018-12-12 2019-09-03 中冶南方工程技术有限公司 可在线更换的喷射管及带钢清洗装置
CN209338622U (zh) * 2018-12-12 2019-09-03 中冶南方工程技术有限公司 能改善带材板形的喷淋冷却装置

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112170493A (zh) * 2020-10-12 2021-01-05 山西陆业达冶金机械有限公司 一种轧制钢板卷取侧导梁喷淋装置

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