CN214349473U - Superspeed billet continuous casting device - Google Patents
Superspeed billet continuous casting device Download PDFInfo
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- CN214349473U CN214349473U CN202022830525.1U CN202022830525U CN214349473U CN 214349473 U CN214349473 U CN 214349473U CN 202022830525 U CN202022830525 U CN 202022830525U CN 214349473 U CN214349473 U CN 214349473U
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Abstract
The utility model belongs to the technical field of metallurgical continuous casting, a hypervelocity billet continuous casting device is proposed, it is weak to aim at solving casting blank drum tripe deformation, cooling strength among the prior art, and the long technical problem of down time is changed on line to uneven and the equipment of casting blank temperature and stress distribution. The device comprises a crystallizer, a crystallizer vibration device and a secondary cooling device which are sequentially arranged from top to bottom along the casting direction. The production method comprises the following steps: cooling the molten steel entering the crystallizer for the first time to solidify and shrink the molten steel to form a thin-wall casting blank with a thin shell on the surface layer and liquid molten steel filled inside; then filling casting powder into a gap between the thin-wall casting blank and the crystallizer copper pipe through a crystallizer vibration device; and carrying out secondary cooling on the thin-wall casting blank by using a secondary cooling device, so that the molten steel inside is solidified and completely converted from a liquid state to a solid state to form a solid casting blank. The utility model discloses a casting blank temperature and stress distribution under the hypervelocity condition are even, and the casting blank can not bulge tripe and warp.
Description
Technical Field
The utility model belongs to the technical field of metallurgical continuous casting, concretely relates to hypervelocity billet continuous casting device.
Background
In the field of metallurgy, a billet continuous casting machine is the most traditional conventional continuous casting machine, the pulling speed of the billet continuous casting machine is generally not high at present, aiming at the condition that the pulling speed of the conventional billet continuous casting with the size of 150mm multiplied by 150mm is mostly between 2.0 and 3.5m/min, the flow number of a single billet is large, the production and operation cost of steel per ton is high, the pulling speed of the billet continuous casting machine is improved, the flow number of the continuous casting machine can be reduced, the construction investment and the production and operation cost are reduced at the same time, and the important premise of realizing the endless rolling of the billet is realized, so the development of an ultrahigh-speed billet continuous casting device is significant to steel enterprises.
The defects existing in the casting process of the conventional billet at present are as follows: (1) the temperature and stress distribution of a new blank shell is not uniform in the circumferential direction due to two-dimensional shrinkage of the casting blank corner, so that the quality defect of the corner or the deflection part is caused, and the improvement of the pulling speed is limited; (2) the lubrication between the crystallizer copper pipe and the casting blank shell is easy to cause slag entrapment due to large liquid level fluctuation; (3) the water passing area of cooling water of the crystallizer is large, the contact circumference of the cooling water and a copper pipe is short, and the heat transfer of the copper pipe is insufficient, so that the cooling strength is insufficient; (4) in the high-speed blank drawing process, the time required for replacing the secondary cold guide section is long, so that the downtime is long. Therefore, the conventional billet casting machine cannot meet the requirement of producing ultra-high-speed billets.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model aims at providing an hypervelocity billet continuous casting device aims at solving casting blank drum tripe among the prior art and warp, cooling strength weak, and casting blank temperature and stress distribution are uneven and the long technical problem of down time is changed to equipment on line.
The utility model discloses a realize through following technical scheme:
the utility model also provides an ultra-high speed billet continuous casting device, which comprises a crystallizer, a crystallizer vibration device and a secondary cooling device which are sequentially arranged from top to bottom along the casting direction; the crystallizer comprises a crystallizer copper pipe penetrating through the crystallizer vibration device and a water cooling structure arranged on the crystallizer copper pipe; the crystallizer vibration device comprises a vibration body, a driving unit arranged in the vibration body and a quick-change unit which is connected to the vibration body and used for horizontally sliding the vibration body; the secondary cooling device comprises a plurality of secondary cooling areas which are sequentially divided along the casting direction, at most four secondary cooling areas which are close to the crystallizer vibration device are super-strong cooling areas, and the subsequent secondary cooling areas are gradual temperature return areas.
The utility model discloses a theory of operation is: firstly, cooling molten steel for the first time in a crystallizer to solidify and contract the molten steel to form a thin-wall casting blank which is filled with the molten steel and has a thin blank shell on the surface; and then, in the casting process, continuously filling protective slag into a gap between the thin-wall casting blank and the crystallizer copper pipe through a crystallizer vibration device to ensure that the thin-wall casting blank and the crystallizer copper pipe are fully lubricated, then, the thin-wall casting blank enters a secondary cooling device for secondary cooling, so that the internal molten steel is solidified and completely changed from a liquid state to a solid state to form a solid casting blank, and if the section specification of the casting blank is 100-250 mm multiplied by 100-250 mm, the normal blank drawing speed range can be controlled within 4-7 m/min.
Furthermore, the water cooling structure is a longitudinal water hole arranged in the wall thickness of the crystallizer copper pipe, the longitudinal water hole is circular, square or special-shaped, the number of the longitudinal water holes on any one side of the crystallizer copper pipe is 6-15, the diameter of a single longitudinal water hole is 8-12 mm, and the distance between the center of the circle and the working surface of the crystallizer copper pipe is 10-16 mm.
Further, the water cooling structure is longitudinal water channels which are arranged on the back of the crystallizer copper pipe at intervals, the concave surfaces of the longitudinal water channels are cambered surfaces or planes, the number of the longitudinal water channels on any one side of the crystallizer copper pipe is 6-15, the depth of each longitudinal water channel is 25% -50% of the wall thickness of the crystallizer copper pipe, and the width of each longitudinal water channel is 3% -8% of the side length of a casting blank.
Furthermore, the driving unit adopts an electro-hydraulic direct-drive servo vibration structure, and the quick-change unit adopts a large-stroke horizontal oil cylinder.
Further, a plurality of small-roller-diameter close-arranged roller structures are adopted in the super-strong cooling area, and the arrangement length is 1-4 m; the gradual temperature return area adopts big clearance single roll bearing structure, and arranges that length is 3 ~ 10m, and the homogeneous phase has arranged a plurality of nozzles relatively on the both sides of every secondary cooling district, and the nozzle arrangement density in superstrong cooling district is greater than the nozzle arrangement density in gradual temperature return area, and the nozzle adopts water nozzle or air water nozzle.
Furthermore, the inner cavity of the crystallizer copper pipe is gradually reduced from one end departing from the secondary cooling device to one end close to the secondary cooling device and is changed in a power function manner.
The utility model has the advantages that:
1) the utility model discloses the cavity type of continuous casting device to crystallizer copper pipe adopts power function tapering curve, makes it more accord with the solidification shrink law of casting blank on vertical, and guarantees in week that casting blank temperature and stress distribution are even, provides the assurance for stable hypervelocity continuous casting.
2) The utility model discloses continuous casting device's crystallizer is through setting up water-cooling structure, can reduce the water-passing area of crystallizer cooling water, increases the girth of cooling water and copper pipe contact to strengthen the copper pipe and conduct heat.
3) The utility model discloses the horizontal oil cylinder of continuous casting device through adopting the big stroke carries out horizontal migration to crystallizer vibrating device for the online change of secondary cooling device of hypervelocity billet continuous casting device is fast, has reduced the required dead time of change equipment.
4) The utility model discloses continuous casting device's secondary cooling device adopts little roller footpath close packing roller structure, supports and leads to casting blank inner arc, outer arc, the side of controlling, can effectively reduce the drum tripe deformation of casting blank.
5) The utility model discloses intensive nozzle that has set up on each secondary cooling district both sides face of continuous casting device's secondary cooling device, its mouth is arranged the interval less, and superstrong cooling zone can adopt different nozzles with progressively returning warm district, promotes the cooling effect.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention may be realized and attained by the means of the instrumentalities and/or combinations particularly pointed out in the appended claims.
Drawings
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail with reference to the accompanying drawings, in which:
FIG. 1 is a schematic longitudinal sectional view of an ultra-high-speed billet continuous casting apparatus according to the present invention.
FIG. 2 is a schematic cross-sectional view of the water cooling structure of the crystallizer according to the present invention;
FIG. 3 is a schematic cross-sectional view of the longitudinal water channel of the crystallizer water cooling structure of the present invention;
FIG. 4 is a schematic flow chart of the production method of the ultra-high speed billet continuous casting of the present invention.
Reference numerals: 10-crystallizer, 11-copper tube, 12-water cooling structure; 20-a vibration device, 21-a quick change unit; 30-secondary cooling device, 31-secondary cooling first zone, 32-secondary cooling second zone, 33-secondary cooling third zone, 34-secondary cooling fourth zone, 35-secondary cooling fifth zone, 36-secondary cooling sixth zone, 37-small-roller-diameter close-packed roller structure, 38-large-gap single-roller supporting structure and 39-nozzle.
Detailed Description
The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will be readily apparent to those skilled in the art from the disclosure herein. The present invention can also be implemented or applied through other different specific embodiments, and various details in the present specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention, and the features in the following embodiments and examples may be combined with each other without conflict.
As shown in fig. 1, the ultra-high speed billet continuous casting apparatus according to the present embodiment includes a mold 10, a mold oscillating device 20, and a secondary cooling device 30, wherein: the crystallizer 10 is arranged above the crystallizer vibration device 20 and mainly comprises a crystallizer copper pipe 11 and a water cooling structure 12, wherein the crystallizer copper pipe 11 is arranged in the crystallizer vibration device 20 in a penetrating way, and the water cooling structure 12 is arranged on the crystallizer copper pipe 11; thus, the mold 10 cools the cast slab for the first time so that it can solidify and contract to form a thin cast slab having a thin shell on the surface and filled with molten steel. The crystallizer vibration device 20 mainly comprises a vibration body, a driving unit and a quick change unit 21, wherein the driving unit is arranged in the vibration body, the vibration body is positioned between the crystallizer and the secondary cooling device, the quick change unit acts on the vibration body, and the quick change unit 21 and the driving unit can be arranged on one side of the secondary cooling device 30; thus, in the casting process, the mold vibration device 20 is mainly used for filling casting powder between the thin-wall casting blank and the mold copper tube 11 so as to ensure sufficient lubrication between the thin-wall casting blank and the mold copper tube 11. The secondary cooling device 30 is arranged below the crystallizer 10 and is sequentially divided into six secondary cooling areas along the casting direction, such as a secondary cooling first area 31, a secondary cooling second area 32, a secondary cooling third area 33, a secondary cooling fourth area 34, a secondary cooling fifth area 35 and a secondary cooling sixth area 36, and the lengths of the respective secondary cooling areas can be reasonably configured according to the specifications of the produced casting blanks and the steel grades; in the early stage of the continuous casting process, because the casting blank shell is thin, in order to prevent the casting blank from bulging and deforming in the continuous casting process, a secondary cooling first area, a secondary cooling second area, a secondary cooling third area and a secondary cooling fourth area which are positioned at the front end can adopt a plurality of small-roller-diameter close-arranged roller structures 37 to support and guide the inner arc, the outer arc, the left side and the right side of the casting blank; in the later stage of the continuous casting process, because the shell of the casting blank is thick and is not easy to bulge and deform, the second-cooling five area and the second-cooling five area which are positioned in the later stage can adopt a large-gap single-roller supporting structure 38 to support the casting blank, and nozzles 39 are arranged on two side faces of the respective secondary cooling areas, and the directions of the nozzles 39 on the two side faces are opposite. By adopting the scheme, the ultra-high-speed billet continuous casting device solves the problems of uneven temperature and stress distribution of the casting blank, bulging deformation, weak cooling strength, long on-line replacement shutdown time of equipment and the like under the ultra-high speed condition.
The quick-change unit 21 in this embodiment employs a large-stroke horizontal cylinder for horizontally moving the crystallizer vibration device 20, so as to achieve quick change of the secondary cooling device 30 in the continuous casting process of small square billets, thereby reducing the downtime required for equipment replacement; because the crystallizer vibration device 20 has the characteristics of high frequency and large amplitude, the driving unit can adopt an electro-hydraulic direct-drive servo vibration structure.
In the embodiment, the number of the secondary cooling zones provided with the small-roll-diameter close-packed roll structures 37 can be 0, 1, 2 or more, and the secondary cooling zones can be reasonably configured according to the specification of the produced casting blank and the steel grade; when the number of the secondary cooling areas provided with the small-roller-diameter close-packed roller structures 37 is 0, 2-3 pairs of foot rollers can be arranged in a secondary cooling area at the lower opening of the crystallizer 10, and the rest secondary cooling areas all adopt large-gap single-roller supporting structures 38.
As shown in fig. 2 to 3, the crystallizer copper tube 11 in this embodiment is a square tube, and the shape of the crystallizer copper tube may be rectangular or square, which is not limited in this embodiment. One end of the crystallizer copper tube 11 is a copper tube upper opening, the other end is a copper tube lower opening, and an inner cavity of the crystallizer copper tube 11 is gradually reduced from the copper tube upper opening to the copper tube lower opening and is changed in a power function manner. Specifically, the length of the inner cavity of the upper opening of the copper pipe is greater than that of the inner cavity of the lower opening of the copper pipe, and half of the length difference between the two is the face taperδ, half of the difference between the diagonal length of the inner cavity of the upper opening of the copper pipe and the diagonal length of the inner cavity of the lower opening of the copper pipe is the diagonal taper ω, the diagonal length here is the distance between the inner sides of a pair of oppositely arranged fillets, namely on the same cross section, the diagonal length is the sum of the connecting line distance of the centers of circles between two fillets and the radius of the two fillets; the vertical height from any position of the inner wall of the crystallizer copper pipe 11 to the upper opening of the copper pipe is h, and the following conditions are met:
(ii) a Wherein, a1＞0，m1＜0；
(ii) a Wherein, a2＞0， m2＜0；a1，m1，a2，m2Are all constants. Meanwhile, the size of a fillet of an inner cavity of the upper opening of the copper pipe is R1, and R1 is 3% -16% of the side length of the casting blank. The inner cavity of the crystallizer copper pipe 11 adopts a power function taper curve, which more accords with the solidification shrinkage rule of the casting blank in the longitudinal direction and ensures the uniform distribution of the temperature and the stress of the casting blank in the circumferential direction.
The water cooling structure 12 in this embodiment is in the form of longitudinal water holes (as shown in fig. 2) formed in the wall thickness of the mold copper tube 11 or longitudinal water grooves (as shown in fig. 3) formed in the back of the mold copper tube 11. When the water cooling structure 12 adopts a form of processing longitudinal water holes in the wall thickness of the crystallizer copper pipe 11, the shape of the longitudinal water holes can be circular, square or special-shaped, the number of the longitudinal water holes on any one side of the crystallizer copper pipe 11 is 6-15, the diameter of each longitudinal water hole is 8-12 mm, and the distance between the center of a circle and the working surface of the crystallizer copper pipe 11 is 10-16 mm. In this embodiment, the center of the longitudinal water holes on one side of the crystallizer copper tube 11 are connected, the number of the longitudinal water holes on two adjacent sides of the crystallizer copper tube 11 and the arrangement of the longitudinal water holes on the opposite side of the crystallizer copper tube 11 are not limited. When the water cooling structure 12 adopts a form of processing longitudinal water channels on the back of the crystallizer copper pipe 11, the longitudinal water channels are arranged at intervals, the concave surfaces of the longitudinal water channels can be cambered surfaces or planes, the number of the water channels on any side of the crystallizer copper pipe 11 is 6-15, the depth of each longitudinal water channel is 25% -50% of the wall thickness of the crystallizer copper pipe 11, the width of each longitudinal water channel is 3% -8% of the side length of a casting blank, and the residual effective wall thickness of the crystallizer copper pipe 11 is 6-10 mm. Similarly, the present embodiment does not limit the depth of each longitudinal water tank, the number of longitudinal water tanks on two adjacent sides of the crystallizer copper tube 11, and the arrangement of each longitudinal water tank on the opposite side of the crystallizer copper tube 11. Therefore, in the casting process, cooling water flows through a longitudinal water hole processed in the wall thickness of the crystallizer copper pipe or a longitudinal water tank processed on the back of the crystallizer copper pipe to cool a casting blank for the first time, and the water cooling structure adopts the two modes to reduce the water passing area of the cooling water and increase the contact perimeter of the cooling water and the crystallizer copper pipe, so that the heat transfer effect of the crystallizer copper pipe is enhanced.
In this embodiment, the two-cold first zone 31, the two-cold second zone 32, the two-cold third zone 33, and the two-cold fourth zone 34 located at the front section of the secondary cooling device 30 are all super-strong cooling zones, the arrangement length thereof is 1-4 m, water nozzles are respectively arranged on two side surfaces of the four secondary cooling zones, and the density of cooling water flow is 15-50L/(m)2S) cooling water pressure of 1.0-3.0 MPa; the secondary cooling five zone 35 and the secondary cooling six zone 36 are gradual temperature return zones, the arrangement length of the temperature return zones is 3-10 m, water nozzles or air water nozzles can be arranged on two side surfaces of the two secondary cooling zones, and the density of cooling water flow is less than 10L/(m)2S), the pressure of the cooling water is less than 1.2 MPa; the water nozzle may be a high pressure nozzle or a normal pressure nozzle. In order to better cool and solidify the casting blank at the front section of the secondary cooling device 30, the density of the nozzles arranged in the super-cooling area should be greater than that of the nozzles arranged in the gradual temperature return area. In the continuous casting process, the casting blank is cooled and solidified for the second time by spraying cooling water or gas water through nozzles 39 arranged on two side surfaces of each secondary cooling area, so that the molten steel in the casting blank is completely changed into a solid state from a liquid state, and a solid casting blank is formed.
The number of the secondary cooling zones included in the super-strong cooling zone and the gradual temperature return zone in this embodiment is not limited to the above, and may be 1, 2, 3 or more, and may be configured reasonably according to the specification of the produced casting blank and the steel grade.
In addition, the secondary cooling device 30 is provided with guide mechanisms on both sides in the width direction of the casting blank for centering and guiding the casting blank and controlling the included angle between the nozzle 39 and the normal direction of the spray surface, and the number of the guide mechanisms can be 0 group, 1 group, 2 groups or a plurality of groups. When casting blanks with different widths are produced, the position of the guide mechanism can be adjusted in a manual mode, an electric mode, a pneumatic mode or a hydraulic mode, and the guide mechanism can be reasonably configured according to actual production conditions. In addition, a solidification end electromagnetic stirrer is arranged in the secondary cooling area, the electromagnetic stirrer can be arranged or not arranged according to the actual production condition, and the type of the arranged battery stirrer can be selected according to the actual production condition.
As shown in fig. 4, the production method based on the above ultra-high-speed billet continuous casting apparatus includes the steps of:
step S1: cooling the molten steel for the first time in a crystallizer to solidify and contract the molten steel to form a thin-wall casting blank which is filled with the molten steel and has a thin blank shell on the surface;
step S2: filling casting powder into a gap between the thin-wall casting blank and the crystallizer copper pipe through a crystallizer vibration device;
step S3: and carrying out secondary cooling on the thin-wall casting blank in a secondary cooling device, so that molten steel in the casting blank is solidified and completely converted from a liquid state to a solid state to form a solid casting blank.
Through the steps, the section specification of the produced casting blank is 100-250 mm multiplied by 100-250 mm, and the normal blank drawing speed range can be 4-7 m/min.
The amount of cooling water for the crystallizer in step S1 is 100-300 m3The cooling water amount of the crystallizer is 150-200 m especially for the common casting blank section with the specification of 150-180 mm multiplied by 150-180 mm3/h。
In order to improve the lubricating effect between a crystallizer copper pipe and a casting blank shell and prevent slag entrapment caused by large liquid level fluctuation, covering slag is required to be continuously added in the casting blank casting process, and in order to meet the production requirement, the melting point of the covering slag is 1050-1200 ℃, and the turning point temperature is 1060-1210 ℃; the viscosity of the casting powder is 0.2-0.6 Pa.s at 1300 ℃ and the alkalinity is 0.8-1.2.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and it is obvious that those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (10)
1. An ultra-high-speed small square billet continuous casting device is characterized by comprising a crystallizer (10), a crystallizer vibration device (20) and a secondary cooling device (30) which are sequentially arranged from top to bottom along the casting direction; the crystallizer comprises a crystallizer copper pipe (11) penetrating through a crystallizer vibration device and a water cooling structure (12) arranged on the crystallizer copper pipe; the crystallizer vibration device comprises a vibration body, a driving unit arranged in the vibration body and a quick-change unit (21) which is connected to the vibration body and used for horizontally sliding the vibration body; the secondary cooling device comprises a plurality of secondary cooling areas which are sequentially divided along the casting direction, at most four secondary cooling areas which are close to the crystallizer vibration device are superstrong cooling areas, and the subsequent secondary cooling areas are gradual temperature return areas.
2. The ultra-high speed billet continuous casting apparatus according to claim 1, wherein the water-cooling structure is a longitudinal water hole provided in the wall thickness of the copper tube of the mold, and the shape of the longitudinal water hole is circular, square or irregular.
3. An ultra high speed billet continuous casting apparatus as claimed in claim 2, wherein the number of said longitudinal water holes on either side of the copper tube of the mold is 6 to 15, and the diameter of the single longitudinal water hole is 8 to 12mm and the distance of the center of the circle from the working surface of the copper tube of the mold is 10 to 16 mm.
4. The ultra-high speed billet continuous casting apparatus according to claim 1, wherein the water-cooling structure is a longitudinal water trough provided at the back of the copper tube of the crystallizer and arranged at intervals, and the concave surface of the longitudinal water trough is a cambered surface or a plane surface.
5. The ultra-high speed billet continuous casting apparatus according to claim 4, wherein the number of the longitudinal water grooves on either side of the crystallizer copper tube is 6-15, and the depth of a single longitudinal water groove is 25-50% of the wall thickness of the crystallizer copper tube and the width is 3-8% of the side length of the cast slab.
6. The ultra-high-speed billet continuous casting device according to claim 1, wherein the driving unit adopts an electro-hydraulic direct-drive servo vibration structure, and the quick-change unit adopts a large-stroke horizontal oil cylinder.
7. The ultra-high-speed billet continuous casting apparatus according to claim 1, wherein the ultra-strong cooling zone adopts a plurality of small-diameter closely-spaced roller structures (37) and the arrangement length is 1-4 m.
8. The ultra-high speed billet continuous casting apparatus according to claim 1, wherein the gradual temperature return region employs a large gap single roll supporting structure (38) and is arranged to have a length of 3 to 10 m.
9. The ultra-high-speed billet continuous casting apparatus according to claim 1, wherein a plurality of nozzles (39) are arranged oppositely on both sides of each secondary cooling zone, and the arrangement density of the nozzles of the super-strong cooling zone is greater than that of the stepwise tempering zone; the nozzle adopts a water nozzle or an air-water nozzle.
10. An ultra high speed billet casting apparatus as claimed in claim 1, wherein the inner cavity of said mold copper tube is tapered and changed in a power function from the end away from the secondary cooling means to the end close to the secondary cooling means.
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| CN202022830525.1U CN214349473U (en) | 2020-11-30 | 2020-11-30 | Superspeed billet continuous casting device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112355256A (en) * | 2020-11-30 | 2021-02-12 | 中冶赛迪工程技术股份有限公司 | Ultrahigh-speed billet continuous casting device and production method |
| CN113798452A (en) * | 2021-10-19 | 2021-12-17 | 重庆大学 | Square billet continuous casting crystallizer copper pipe and method for efficiently utilizing cooling water |
| CN112355256B (en) * | 2020-11-30 | 2024-07-09 | 中冶赛迪工程技术股份有限公司 | Ultra-high-speed billet continuous casting device and production method |
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2020
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112355256A (en) * | 2020-11-30 | 2021-02-12 | 中冶赛迪工程技术股份有限公司 | Ultrahigh-speed billet continuous casting device and production method |
| CN112355256B (en) * | 2020-11-30 | 2024-07-09 | 中冶赛迪工程技术股份有限公司 | Ultra-high-speed billet continuous casting device and production method |
| CN113798452A (en) * | 2021-10-19 | 2021-12-17 | 重庆大学 | Square billet continuous casting crystallizer copper pipe and method for efficiently utilizing cooling water |
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