CN102994701A - Method for thinning size of argon gas bubbles during refining - Google Patents
Method for thinning size of argon gas bubbles during refining Download PDFInfo
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- CN102994701A CN102994701A CN2012104985959A CN201210498595A CN102994701A CN 102994701 A CN102994701 A CN 102994701A CN 2012104985959 A CN2012104985959 A CN 2012104985959A CN 201210498595 A CN201210498595 A CN 201210498595A CN 102994701 A CN102994701 A CN 102994701A
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- molten steel
- argon gas
- gas bubbles
- ultrasonic vibration
- argon
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Abstract
The invention provides a method for thinning the size of argon gas bubbles during refining. The method comprises the following steps of: controlling the temperature of molten steel to be between 1560 and 1620 DEG C during LF (ladle furnace) refining; controlling the flow of the argon gas passing through an air brick to be between 450 and 570 Nl/min to ensure that the pressure is between 0.3 and 0.4MPa; and applying ultrasonic vibration with the frequency of 25000-32000Hz to the molten steel near the air brick at the bottom of a large tank. When a weak sound wave signal is acted upon the molten steel, the molten steel generates certain negative pressure; while a strong sound wave signal is acted upon the molten steel, the molten steel generates certain positive pressure, so that the argon gas bubbles in the molten steel are broken by ultrasonic vibration to form fine and small argon gas bubbles which are distributed uniformly in the molten steel; and therefore, the floatation of impurities in the steel is facilitated, and the aim of stirring the molten liquid in a macro-energy mode can be fulfilled.
Description
Technical field
The invention belongs to the process for making field, particularly a kind of method for ladle refining furnace (LF stove) refining process refinement Argon Bubble size.
Background technology
Along with the kinds such as cord steel, spring steel to improving constantly that cleanliness factor requires, argon gas stirs as a kind of method that promotes the steel inclusion floating to discharge molten steel and has obtained using more widely.The Argon Bubble of tiny inclusion and similar sizes interacts in the steel, can promote the floating of steel inclusion.
In the common Argon stirring technique, argon flow amount is controlled at about 200 Nl/min, although can reach the effect that produces tiny Argon Bubble, not enough to the processing power of whole molten steel because the energy of its stirring is less, therefore effect and not obvious.For improving the cleanliness factor of molten steel, be badly in need of providing a kind of and can produce tiny bubble, can realize again molten steel is carried out the method that macro-energy (argon flow amount is more than 400 Nl/min) stirs.
Summary of the invention
Purpose of the present invention aims to provide a kind of simple, both can produce tiny bubble in molten steel, can realize again molten steel is carried out the method for the LF stove refining process refinement Argon Bubble size of macro-energy stirring.
For this reason, the present invention has taked following technical solution:
The method of a kind of refining process Argon Bubble size refinement, its concrete grammar is:
In the ladle refining furnace refining process, molten steel temperature is controlled at 1560-1620 ℃, argon flow amount by gas permeable brick is controlled at 450-570Nl/min, pressure is 0.3-0.4MPa, near large pot bottom gas permeable brick position, molten steel is applied ultrasonic vibration simultaneously, ultrasonic frequency is controlled at 25000-32000Hz, by ultrasonic vibration, the Argon Bubble in the molten steel is shatter, make the tiny Argon Bubble of formation in the molten steel.
Beneficial effect of the present invention is:
Because the present invention applies ultrasonic vibration to molten steel in LF stove refining process, when weak acoustic signals acts on molten steel, can produce certain negative pressure to molten steel; And when strong acoustic signals acts on molten steel, then can produce certain malleation to molten steel, therefore by ultrasonic vibration, can the Argon Bubble in the molten steel is shatter, thereby in molten steel, form the tiny Argon Bubble that is evenly distributed, be conducive to promote the floating of steel inclusion; Can realize again simultaneously molten steel is carried out the purpose that macro-energy stirs.
Embodiment
The present invention will be further described below in conjunction with embodiment.
Embodiment 1:
In the ladle refining furnace refining process, molten steel temperature is controlled at 1602 ℃, argon flow amount by gas permeable brick is controlled at 450Nl/min, pressure is 0.32MPa, near large pot bottom gas permeable brick position, molten steel is applied ultrasonic vibration simultaneously, ultrasonic frequency is controlled at 25000Hz, by ultrasonic vibration, the Argon Bubble in the molten steel is shatter, make the tiny Argon Bubble of formation in the molten steel.
Embodiment 2:
In the ladle refining furnace refining process, molten steel temperature is controlled at 1579 ℃, argon flow amount by gas permeable brick is controlled at 500Nl/min, pressure is 0.35MPa, near large pot bottom gas permeable brick position, molten steel is applied ultrasonic vibration simultaneously, ultrasonic frequency is controlled at 30000Hz, by ultrasonic vibration, the Argon Bubble in the molten steel is shatter, make the tiny Argon Bubble of formation in the molten steel.
Embodiment 3:
In the ladle refining furnace refining process, molten steel temperature is controlled at 1562 ℃, argon flow amount by gas permeable brick is controlled at 570Nl/min, pressure is 0.39MPa, near large pot bottom gas permeable brick position, molten steel is applied ultrasonic vibration simultaneously, ultrasonic frequency is controlled at 32000Hz, by ultrasonic vibration, the Argon Bubble in the molten steel is shatter, make the tiny Argon Bubble of formation in the molten steel.
Claims (1)
1. the method for refining process Argon Bubble size refinement is characterized in that:
In the ladle refining furnace refining process, molten steel temperature is controlled at 1560-1620 ℃, argon flow amount by gas permeable brick is controlled at 450-570Nl/min, pressure is 0.3-0.4MPa, near large pot bottom gas permeable brick position, molten steel is applied ultrasonic vibration simultaneously, ultrasonic frequency is controlled at 25000-32000Hz, by ultrasonic vibration, the Argon Bubble in the molten steel is shatter, make the tiny Argon Bubble of formation in the molten steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104985959A CN102994701A (en) | 2012-11-30 | 2012-11-30 | Method for thinning size of argon gas bubbles during refining |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104985959A CN102994701A (en) | 2012-11-30 | 2012-11-30 | Method for thinning size of argon gas bubbles during refining |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102994701A true CN102994701A (en) | 2013-03-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012104985959A Pending CN102994701A (en) | 2012-11-30 | 2012-11-30 | Method for thinning size of argon gas bubbles during refining |
Country Status (1)
| Country | Link |
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| CN (1) | CN102994701A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112048623A (en) * | 2020-09-07 | 2020-12-08 | 孔霄 | Aluminum alloy smelting and purifying equipment |
| CN114951571A (en) * | 2022-06-16 | 2022-08-30 | 武汉钢铁有限公司 | Method for expanding equiaxial crystal zone in cord steel continuous casting billet |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06220551A (en) * | 1993-01-29 | 1994-08-09 | Kawasaki Steel Corp | Method for removing nonmetallic inclusion in molten metal by ultrasonic wave |
| CN1730199A (en) * | 2005-08-18 | 2006-02-08 | 广东圣都模具股份有限公司 | Method for removing impurities in cast-steel smelt by supersonic wave and single-purpose device thereof |
| CN101307374A (en) * | 2007-05-15 | 2008-11-19 | 宝山钢铁股份有限公司 | Process for removing nonmetal inclusion in molten steel |
| CN102145380A (en) * | 2011-03-08 | 2011-08-10 | 武汉科技大学 | Method for continuously casting clean molten steel in tundish |
| CN102260769A (en) * | 2010-05-25 | 2011-11-30 | 辽宁科技大学 | Ladle refining method for improving dynamical conditions by using ultrasonic wave |
-
2012
- 2012-11-30 CN CN2012104985959A patent/CN102994701A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06220551A (en) * | 1993-01-29 | 1994-08-09 | Kawasaki Steel Corp | Method for removing nonmetallic inclusion in molten metal by ultrasonic wave |
| CN1730199A (en) * | 2005-08-18 | 2006-02-08 | 广东圣都模具股份有限公司 | Method for removing impurities in cast-steel smelt by supersonic wave and single-purpose device thereof |
| CN101307374A (en) * | 2007-05-15 | 2008-11-19 | 宝山钢铁股份有限公司 | Process for removing nonmetal inclusion in molten steel |
| CN102260769A (en) * | 2010-05-25 | 2011-11-30 | 辽宁科技大学 | Ladle refining method for improving dynamical conditions by using ultrasonic wave |
| CN102145380A (en) * | 2011-03-08 | 2011-08-10 | 武汉科技大学 | Method for continuously casting clean molten steel in tundish |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112048623A (en) * | 2020-09-07 | 2020-12-08 | 孔霄 | Aluminum alloy smelting and purifying equipment |
| CN114951571A (en) * | 2022-06-16 | 2022-08-30 | 武汉钢铁有限公司 | Method for expanding equiaxial crystal zone in cord steel continuous casting billet |
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Application publication date: 20130327 |