CN102441664A - Method for protectively pouring ladle in vacuum pouring process - Google Patents
Method for protectively pouring ladle in vacuum pouring process Download PDFInfo
- Publication number
- CN102441664A CN102441664A CN201110412908XA CN201110412908A CN102441664A CN 102441664 A CN102441664 A CN 102441664A CN 201110412908X A CN201110412908X A CN 201110412908XA CN 201110412908 A CN201110412908 A CN 201110412908A CN 102441664 A CN102441664 A CN 102441664A
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- China
- Prior art keywords
- ladle
- protective casing
- pouring
- molten steel
- tundish
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Abstract
The invention provides a method for protectively pouring a ladle in the vacuum pouring process. The method is implemented by the following steps of: arranging a ladle down nozzle (1) at the bottom of the ladle; arranging a protective casing (4) at the lower end of the ladle down nozzle (1); and inserting the other end of the protective casing (4) into molten steel of a tundish for hermetically and protectively pouring, wherein the lower end of the ladle down nozzle (1) is provided with an external thread (2); and the upper end of the protective casing (4) is provided with an internal thread (3). Due to the adoption of the method, the phenomena of secondary oxidation and splashing occurring when the molten steel is inserted into the tundish are avoided, and the problems of reduction in the molten steel quality, unstable liquid level of the tundish and influence on pouring and ingot casting quality caused by secondary oxidation and splashing are solved. Due to the adoption of the matched threads on the ladle down nozzle (1) and the protective casing (4), the protective casing (4) is easier and more convenient to install.
Description
Technical field
The invention belongs to vacuum pouring and use fire resisting material field, relate generally to a kind of method that is used for vacuum pouring process ladle protection cast.
Background technology
Vacuum-casting is claimed in vacuum pouring again, is ingot mould is inserted in the vacuum chamber, and molten steel injects the molten steel application of vacuum technology that ingot mould is cast steel ingot through placing the tundish on the vacuum chamber lid.Vacuum-casting is a kind of drip vacuum processing method, and the molten steel that descends with a fluid stream shape in the pans gets in the vacuum chamber, because pressure sharply descends; A fluid stream is expanded; And be launched into very big angle with the landing of drip shape, and degassing surface area is increased, help the gas effusion and promote surface reaction.
Before the vacuum pouring, chassis, ingot mould, hot top be assembled in vacuum chamber in advance, covers vacuum room cover, when smelting closes to an end, begins to install mozzle and lays tundish, begins then to vacuumize.When about 2/3 height and pouring temperature reach technological requirement in the molten steel in the ladle injects tundish, open the tundish stopper rod, molten steel flows out through the mouth of a river, and the aluminium basin on the fusing cast gate gets into vacuum chamber and injects in the ingot mould.The ingot steel casting destruction vacuum that finishes is opened the vacuum chamber lid, adds heat preserving agent, and steel ingot leaves standstill in mould and solidifies the back demoulding fully and send the hydraulic press workshop.
Before vacuum pouring begins, be heated into liquid molten steel and at first be contained in the ladle,, and molten steel directly injected tundish by overhead traveling crane roping to tundish top.This molten steel is directly injected the method for tundish, be prone to make molten steel that oxidation takes place in injection process and splash, thereby reduce the molten steel quality, cause the tundish liquid level unstable, influence casting quality.
Summary of the invention
The object of the invention just is to propose a kind of method that is used for vacuum pouring process ladle protection cast; Make it be applicable to vacuum pouring; With solve directly with molten steel inject molten steel oxidation that tundish brought and splash, the tundish liquid level is unstable, thereby influence the problem of product quality.
Its technical scheme is: when molten steel by ladle when tundish injects; For fear of oxidation with splash; Be provided with the mouth of a river under the ladle (1) at ladle bottom, protective casing (4) is installed in the lower end of the mouth of a river under ladle (1), and carries out the seal protection cast in the molten steel of insertion tundish.Wherein, the lower end of the mouth of a river under the ladle (1) is provided with outer silk screw thread (2), and the upper end of protective casing (4) is provided with internal thread screw thread (3).During use, can be directly the mouth of a river (1) under protective casing (4) and the ladle be connected use through screw thread.
The mouth of a river (1) and protective casing (4) under the ladle that the present invention makes; A series of problems that molten steel directly causes from ladle injection tundish in the time of can solving the traditional vacuum cast fully; Avoid molten steel generation secondary oxidation and splash; Realized molten steel protection cast, solved owing to the problem that the secondary oxidation and the molten steel quality that causes of splashing reduce, the tundish liquid level is unstable, influence casting quality.In this method, the mouth of a river under the ladle (1) and protective casing (4) are respectively equipped with outer silk screw thread (2) and internal thread screw thread (3), are convenient to install, and have improved production efficiency.
Description of drawings
Accompanying drawing is used for the sketch map of the method for vacuum pouring process ladle protection cast for the present invention is a kind of.
Among the figure, 1, the mouth of a river under the ladle, 2, outer silk screw thread, 3, the internal thread screw thread, 4, protective casing.
The specific embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is made further detailed description.
The mouth of a river under the ladle (1) is installed in the lower end of ladle, and its lower end is provided with outer silk screw thread (2), and protective casing (4) upper end is provided with internal thread screw thread (3).During use, the screw thread at the mouth of a river (1) under protective casing (4) and the ladle is docked, so just can be below the mouth of a river under the ladle (1) installation protective casing (4).
During cast, protective casing (4) lower end is immersed in the tundish molten steel face, and molten steel can flow into tundish through the pipeline that the mouth of a river (1) under the ladle and protective casing (4) are formed, thereby has avoided the oxidation of molten steel and splash, and has realized that protection pours into a mould.
Claims (3)
1. method that is used for the protection cast of vacuum pouring process ladle is characterized in that: the mouth of a river (1) connects together with internal thread screw thread (3) through outer screw thread (2) under protective casing (4) and the ladle.
2. method according to claim 1 is characterized in that: the lower end of the mouth of a river under the ladle (1) is provided with outer silk screw thread (2).
3. according to claim 1 or the described method of claim 2, it is characterized in that: the upper end of protective casing (4) is provided with internal thread screw thread (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110412908XA CN102441664A (en) | 2011-12-13 | 2011-12-13 | Method for protectively pouring ladle in vacuum pouring process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110412908XA CN102441664A (en) | 2011-12-13 | 2011-12-13 | Method for protectively pouring ladle in vacuum pouring process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102441664A true CN102441664A (en) | 2012-05-09 |
Family
ID=46004875
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110412908XA Pending CN102441664A (en) | 2011-12-13 | 2011-12-13 | Method for protectively pouring ladle in vacuum pouring process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102441664A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102829839A (en) * | 2012-08-31 | 2012-12-19 | 燕山大学 | Device for detecting vacuum casting under-height of casting and forging steel |
| CN109834252A (en) * | 2019-04-01 | 2019-06-04 | 山东钢铁集团日照有限公司 | A method of improving ladle upper nozzle service life |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1995013890A1 (en) * | 1993-11-16 | 1995-05-26 | Ccpi Inc. | Turbulence inhibiting tundish and impact pad |
| CN2231585Y (en) * | 1995-05-21 | 1996-07-24 | 沁阳市耐火材料厂 | Composite upper runner for continuous casting ladle |
| WO1997023319A1 (en) * | 1995-12-22 | 1997-07-03 | Hoogovens Staal B.V. | Method and apparatus for the manufacture of formable steel |
| CN200970626Y (en) * | 2006-09-01 | 2007-11-07 | 上海大学 | Connection tube heater between horizontal continuous casting pouring ladle and crystallizer |
| CN201744649U (en) * | 2010-08-06 | 2011-02-16 | 青岛正望耐火材料有限公司 | Protective sleeve pipe provided with thread |
-
2011
- 2011-12-13 CN CN201110412908XA patent/CN102441664A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1995013890A1 (en) * | 1993-11-16 | 1995-05-26 | Ccpi Inc. | Turbulence inhibiting tundish and impact pad |
| CN2231585Y (en) * | 1995-05-21 | 1996-07-24 | 沁阳市耐火材料厂 | Composite upper runner for continuous casting ladle |
| WO1997023319A1 (en) * | 1995-12-22 | 1997-07-03 | Hoogovens Staal B.V. | Method and apparatus for the manufacture of formable steel |
| CN200970626Y (en) * | 2006-09-01 | 2007-11-07 | 上海大学 | Connection tube heater between horizontal continuous casting pouring ladle and crystallizer |
| CN201744649U (en) * | 2010-08-06 | 2011-02-16 | 青岛正望耐火材料有限公司 | Protective sleeve pipe provided with thread |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102829839A (en) * | 2012-08-31 | 2012-12-19 | 燕山大学 | Device for detecting vacuum casting under-height of casting and forging steel |
| CN102829839B (en) * | 2012-08-31 | 2014-04-16 | 燕山大学 | Device for detecting vacuum casting under-height of casting and forging steel |
| CN109834252A (en) * | 2019-04-01 | 2019-06-04 | 山东钢铁集团日照有限公司 | A method of improving ladle upper nozzle service life |
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Legal Events
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20120509 |