CN1048930C - Continuous casting process of subminiature section casting blank - Google Patents
Continuous casting process of subminiature section casting blank Download PDFInfo
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- CN1048930C CN1048930C CN93109709A CN93109709A CN1048930C CN 1048930 C CN1048930 C CN 1048930C CN 93109709 A CN93109709 A CN 93109709A CN 93109709 A CN93109709 A CN 93109709A CN 1048930 C CN1048930 C CN 1048930C
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Abstract
The present invention belongs to the field of the continuous casting of metal. The present invention is mainly suitable for the continuous casting of a subminiature section casting blank. The present invention is characterized in that the present invention uses a compound crystallizer which is composed of a hot top crystallizer and a lower crystallizer. The inner wall of the hot top crystallizer is the upright face or the bevel, a heating element is arranged in the hot top crystallizer, and the bottom is the flat bottom face or the conical face. The lower crystallizer is a water-cooling crystallization copper bush, and an inner cavity of the lower crystallizer forms a straight barrel type. When the casting blank is cast, an immersed type water inlet is inserted into the hot top crystallizer, and the immersed type water inlet can not be used. Continuous casting protective slag is not required, and molten steel does not form a solidified shell in the hot top crystallizer. A dummy bar starts to pull the blank by vibrating the crystallizers, and a blank pulling machine and a pulling and correcting machine finish the blank pulling process.
Description
The present invention relates to the continuous casting of metal device, mainly be applicable to light section strands such as casting 30 * (30-65) * 65mm square billet, φ 30-φ 65mm circle base, (10-40) * (100-600) mm sheet billet.
In the continuous casting of metal slabs, its key problem in technology is a continuous cast mold.
In the existing vertical slab continuous cast method, the slab thickness of casting is that the crystallizer of 40-50mm is divided into two classes: the one, and the funnel type crystallizer is as CN85101082A; The 2nd, composed mold is as CN92206782.2, CN92103257.9.Their common feature is: the funnel type zone of a up big and down small even variation is all arranged at (1) crystallizer top, is convenient to submersed nozzle and inserts; (2) device or the parts that sidewall all has certain capacity of heat transmission are made up on crystallizer top, make molten steel contact crystallizer wall on top, promptly form nascent solidified shell.Initial solidification shell becomes the straight square-section of matching with the crystallizer bottom through stress deformation and solidification shrinkage.But still there is following common drawback in above-mentioned patent:
(1) just green compact are in crystallizer upper funnel type zone, and temperature is higher, though yielding, intensity is extremely low, and local stress concentration will cause the drawing crack of base shell, and the bleed-out accident takes place therefrom.
(2) initial solidification shell by funnel-form in the process of vertical rectangle shape transition because distortion, easily the solidification front at molten steel cracks, and influences the internal soundness of steel.
(3) in order to make submersed nozzle insert the crystallizer lumen; the crystallizer upper dimension must guarantee up big and down small gradually changing; this generation to the covering slag film is played inhibition with mobile, is unfavorable for the uniform covering slag film forming stable between solidified shell and the not cold copper wall.
(4) processed complex, difficulty is repaired in impaired back.
(5) when the thin strand of casting, especially the strand width hour, the funnel type crystallizer can't be realized by the back transition distortion of curved surface to the plane.
U.S. Pat 5,232,046 provides a kind of casting apparatus.The crystallizer of this device is the composed mold that hot top crystallizer and following crystallizer are formed, and hot top crystallizer is connected by insert with following crystallizer, and this insert is pressed on the copper coin of crystallizer, and the resistance wire of heating outlet is housed in the insert.The cross dimensions of insert molten steel channel mouth equates with the cross dimensions of following crystallizer internal cavity.The purpose of insert heating is that nascent solidified shell must be formed below the boundary line of insert and following crystallizer, promptly can not form nascent solidified shell at the inwall of insert.In fact this requirement is difficult to realize that because insert is in heated condition, following crystallizer is the water-cooled state, therefore, be etched easily, in case be etched at both seam crossings, then nascent solidified shell is suspended on seam crossing, causes nascent solidified shell to be difficult to move downward, and forms and breaks or the bleed-out accident.
The object of the present invention is to provide a kind of square billet of casting be of a size of 30 * (30-65) * 65mm square billet, circle base be of a size of φ 30-φ 65mm, slab is of a size of the subminiature section casting blank casting apparatus of (10-40) * (100-600) mm.
In order to achieve the above object, technical measures of the present invention are: at first adopt the composed mold of being made up of hot top crystallizer and following crystallizer; Hot top crystallizer also is a tundish; The inwall of hot top crystallizer is vertical surface or inclined-plane, and the bottom is the planar base surface or the conical surface, and it is the molten bath that the fixing MULTILAYER COMPOSITE refractory lining of steel body material is formed, and imbeds heating element heater in the refractory material; Following crystallizer is the fixing water mold copper sheathing of steel body material, and its inner chamber is a straight barrel type.Hot top crystallizer adopts double-decker to link to each other with following crystallizer, and the upper strata is a upper nozzle brick, and by any is made in high alumina matter, aluminium carbonaceous or the zirconia material, its molten steel channel mouth cross dimensions is greater than or less than down the crystallizer internal cavity cross dimensions; Lower floor is any connector of making in boron nitride, silicon nitride or the high-strength graphite, and its molten steel channel mouth cross dimensions is less than or equal to crystallizer internal cavity cross dimensions down.Following crystallizer water cooling copper sleeve can be combined by single copper pipe or polylith copper coin, the fixed body that make for steel the copper sheathing outside.
Now the invention will be further described in conjunction with the accompanying drawings.
Accompanying drawing 1 is the structural representation of the composed mold of subminiature section casting blank casting apparatus of the present invention.
Accompanying drawing 2 is the structural representation of subminiature section casting blank casting apparatus of the present invention.
Find out that by attached Fig. 1 and 2 subminiature section casting blank casting apparatus of the present invention is made up of hot top crystallizer, following crystallizer, upper nozzle brick 4, connector 5, strand backing roll 13, throwing roller 14, dummy bar 15 and straightening roller 16.Hot top crystallizer is made up of insulating refractory layer 3, refractory material permanent layer 6 and fixed jacket 7.Heating element heater 2 is embedded in the insulating refractory layer 3.Following crystallizer is made up of external cover 8 of steel and water cooling copper sleeve 9.Hot top crystallizer is connected with following crystallizer with connector 5 by upper nozzle brick 4, and connector 5 is embedded in down in the crystallizer, and upper nozzle brick 4 is pressed on the connector 5.
The technical process of strand casting apparatus of the present invention is as follows:
At first on the suitable height of following crystallizer that inner chamber is stifled tight with dummy head, molten steel injects hot top crystallizer immediately, and is available, also can be without submersed nozzle.Owing to be embedded with heating element heater in the refractory material of hot top crystallizer sidewall, adding does not have the heat conduction, and therefore, molten steel can not solidify in the crystallizer of hot top, in the fever type coverture protection of the upper surface in molten bath, prevents molten steel heat radiation and secondary oxidation.When molten steel by molten steel channel mouth contact down during the water cooling copper sleeve of crystallizer, the beginning vibrating crystallizer, molten steel begins to solidify, and forming uniform initial solidification shell on the crystallizer cavity upper inside wall down, simultaneously, spurs dummy bar downwards, carries out process of billet withdrawal.Along with the carrying out of process of billet withdrawal, the base shell moves down, and progressive additive, finishes at last and solidifies, and promptly begins throwing by dummy bar head and dummy bar, finishes process of billet withdrawal by Blank drawing machine and straightening machine, and continuous casting is constantly carried out.During casting, adopt the sealing casting.
Compared with prior art, the present invention has following advantage:
(1) owing to the present invention molten bath (Hot-Top mould) is connected with water mold (lower crystallizer) Be integral, enter to solidify the problem in chamber with regard to fundamentally having solved the steel conductance, the casting blank shape of casting and chi Very littlely no longer be restricted, especially when casting light section strand, more superior.
(2) because the inwall of Hot-Top mould is vertical surface or inclined-plane, and the bottom is planar base surface or the conical surface, lower Crystallization water copper sheathing inner chamber is straight barrel type, so processing is simple, repairs easily, and cost is low.
(3) because molten steel does not form solidified shell at hot top crystallizer, have only when the crystallizer water cooling copper sleeve is descended in the molten steel contact, just begin to solidify, inwall forms initial solidification shell at an upper portion thereof.This initial solidification shell is even, does not have distortion, is favourable to the strand internal soundness.
(4) because the molten steel channel mouth cross dimensions of connector of the present invention is less than or equal to crystallizer internal cavity cross dimensions down, at the metal freezing initial stage, nascent solidified shell is subjected to the cooling of connector from last and upper and lower crystallizer ecto-entad both direction, form up big and down small scull, favourable formation continuous solidification shell guarantees that continuous casting normally carries out.
Claims (2)
1, a kind of subminiature section casting blank casting apparatus comprises crystallizer, dummy bar head, strand backing roll, throwing roller, dummy bar, straightening roller; Crystallizer is the composed mold that hot top crystallizer and following crystallizer are formed, hot top crystallizer is the molten bath that the fixing MULTILAYER COMPOSITE refractory lining of steel body material is formed, imbed heating element heater in the crystallizer refractory lining of hot top, following crystallizer internal cavity is a straight barrel type, hot top crystallizer links to each other with molten steel channel with following crystallizer, it is characterized in that:
The inwall of hot top crystallizer is vertical surface or inclined-plane, and the bottom is the planar base surface or the conical surface; Following crystallizer is the fixing water mold copper sheathing of steel body material; Hot top crystallizer adopts double-decker to be connected with following crystallizer, and the upper strata is a upper nozzle brick, and lower floor is a connector, and connector is embedded in down in the crystallizer; The molten steel channel mouth cross dimensions of upper nozzle brick is greater than or less than the crystallizer internal cavity cross dimensions; Part molten steel channel mouth cross dimensions is less than or equal to crystallizer internal cavity cross dimensions down in succession; And connector is by any is made in boron nitride, silicon nitride or the high-strength graphite.
2, device according to claim 1 is characterized in that upper nozzle brick is by any is made in high alumina matter, aluminium carbonaceous or the zirconia material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN93109709A CN1048930C (en) | 1993-08-12 | 1993-08-12 | Continuous casting process of subminiature section casting blank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN93109709A CN1048930C (en) | 1993-08-12 | 1993-08-12 | Continuous casting process of subminiature section casting blank |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1084439A CN1084439A (en) | 1994-03-30 |
| CN1048930C true CN1048930C (en) | 2000-02-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN93109709A Expired - Fee Related CN1048930C (en) | 1993-08-12 | 1993-08-12 | Continuous casting process of subminiature section casting blank |
Country Status (1)
| Country | Link |
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| CN (1) | CN1048930C (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102672120A (en) * | 2012-04-25 | 2012-09-19 | 中国重型机械研究院有限公司 | Production device for continuous casting of vertical tube blanks |
| CN104138922B (en) * | 2014-06-25 | 2016-01-06 | 湖南大学 | A kind of production equipment and process of copper cover aluminum bimetallic composite wire rod |
| CN105215311B (en) * | 2015-11-19 | 2017-08-01 | 内蒙古包钢钢联股份有限公司 | A kind of billet continuous casting open casting operation method |
| CN107586965A (en) * | 2016-07-06 | 2018-01-16 | 宁波江丰电子材料股份有限公司 | Smelting equipment and method of smelting |
| CN115319036B (en) * | 2022-08-17 | 2023-10-24 | 巢湖云海镁业有限公司 | Hot top casting device for magnesium and magnesium alloy |
| CN115283631B (en) * | 2022-09-01 | 2023-08-01 | 一重集团大连工程技术有限公司 | Thermal insulation riser device and control method thereof |
| CN117300085B (en) * | 2023-10-11 | 2024-07-02 | 清远楚江高精铜带有限公司 | Forming die and drawing and casting forming equipment |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4901783A (en) * | 1985-01-04 | 1990-02-20 | Gus Sevastakis | Continuous casting apparatus |
| US4955428A (en) * | 1986-08-18 | 1990-09-11 | Mannesmann Ag | Device for continuous casting of slabs |
| US5058656A (en) * | 1987-04-13 | 1991-10-22 | Thyssen Stahl Ag | Installation for the production of a steel strip |
| US5232046A (en) * | 1990-01-22 | 1993-08-03 | Mesta International | Strand casting apparatus and method |
-
1993
- 1993-08-12 CN CN93109709A patent/CN1048930C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4901783A (en) * | 1985-01-04 | 1990-02-20 | Gus Sevastakis | Continuous casting apparatus |
| US4955428A (en) * | 1986-08-18 | 1990-09-11 | Mannesmann Ag | Device for continuous casting of slabs |
| US5058656A (en) * | 1987-04-13 | 1991-10-22 | Thyssen Stahl Ag | Installation for the production of a steel strip |
| US5232046A (en) * | 1990-01-22 | 1993-08-03 | Mesta International | Strand casting apparatus and method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1084439A (en) | 1994-03-30 |
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