CN103014240A - Refining method of eccentric argon bottom blowing by inserting impregnation cylinder into ladle - Google Patents
Refining method of eccentric argon bottom blowing by inserting impregnation cylinder into ladle Download PDFInfo
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- CN103014240A CN103014240A CN2012105396294A CN201210539629A CN103014240A CN 103014240 A CN103014240 A CN 103014240A CN 2012105396294 A CN2012105396294 A CN 2012105396294A CN 201210539629 A CN201210539629 A CN 201210539629A CN 103014240 A CN103014240 A CN 103014240A
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- ladle
- bottom blowing
- refining
- molten steel
- argon
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Abstract
The invention discloses a refining method of eccentric argon bottom blowing by inserting an impregnation cylinder into a ladle, which aims to improve the stirring effect of molten steel. The invention is characterized in that an impregnation cylinder, which has the same center of circle as the bottom blowing gas hole, is inserted into a ladle, wherein the insertion depth of the impregnation cylinder is 150-1000mm away from the molten steel surface, the bottom blowing gas hole is in the position 1/2R away from the center of the ladle, R is the radius of the lower opening of the ladle, and the argon blowing flow rate is 1-300Nm<3>/h; and the argon blowing refining time is 10-60 minutes. The invention can greatly increase the bottom blowing gas amount to enhance the uniform mixing efficiency; the invention weakens the flow of the molten steel at the ladle wall, thereby lowering the corrosion degree of the refractory material; and the bottom blowing gas amount is adjusted within a wide range, thereby enhancing the refining efficiency and shortening the refining time.
Description
Technical field
The invention belongs to metallurgical steel-making furnace outer refining technology field, relate to a kind of method of refining that inserts the ladle eccentric bottom blown argon of dipping cylinder.
Background technology
Along with the raising of user to the steel product quality requirement, furnace outer refining technology comes into one's own, and wherein the steel ladle bottom argon blowing technology is widely used in steel mill, and this technique is accelerated mass transfer and the heat transfer of molten steel on the one hand, evenly liquid steel temperature and composition are accelerated the desulfating and deoxidation reaction; The polymerization and the come-up that are conducive on the other hand fine foreign matter have been removed nonmetal inclusion and the obnoxious flavour in the steel, reach pure molten steel, reduce Oxygen Content in Liquid Steel, thereby reach the purpose of refining liquid steel.Argon gas is after ladle bottom is blown into the molten steel, be scattered in the molten steel and come-up with bubble form, and molten steel on every side is subjected to the driving of buoyancy, above gas permeable brick, form to the upper reaches thigh, reach the molten steel top, turn to horizontal direction, then backflow downwards along the steel ladle place, molten steel is flowed at the ladle internal recycle.Molten steel this circulates the blending efficiency that is conducive on the one hand to improve molten steel and reaches the purpose of liquid steel refining, but makes again on the other hand molten steel turn over the secondary oxidation of slag and excessive steel and molten steel, causes the vibration of ladle, corrodes ladle lining fireproof material.
The method of refining of present steel ladle bottom argon blowing for improving all mixed efficient of molten steel, can increase BOTTOM ARGON BLOWING tolerance, but when BOTTOM ARGON BLOWING tolerance was larger, it is serious that molten steel turns over slag, so that molten steel is exposed in the air, cause secondary oxidation, limited increase BOTTOM ARGON BLOWING tolerance, and affect the mixing effect of molten steel.
Summary of the invention
The invention provides a kind of method of refining that inserts the ladle eccentric bottom blown argon of dipping cylinder, improve the mixing effect of molten steel.
The feature of the method for refining of the ladle eccentric bottom blown argon of insertion dipping cylinder provided by the invention is:
In ladle, insert a dipping cylinder, dipping cylinder and bottom blowing pore concentric, dipping cylinder depth of penetration is distance steel liquid level 150～1000mm, and the bottom blowing pore is positioned at apart from ladle width between centers 1/2R position, and R is port radius under the ladle, argon blowing rate 1～300Nm
3/ h; The ar blowing refining time is 10～60min.
The present invention compares with class methods with existing.Its significant beneficial effect is embodied in:
1. after in ladle, inserting the dipping cylinder, can be in that not produce the steel liquid fluctuating large, cause that molten steel turns over slag and overflows under the conditions such as secondary oxidation of steel and molten steel, significantly increase bottom blowing tolerance, to improve all mixed efficient.
2. circulating of inserting that molten steel forms behind the dipping cylinder in ladle mainly concentrated in the dipping cylinder and the dipping cylinder below, weakened molten steel the flowing of steel ladle place, thereby reduced the erosion degree of refractory materials.
3. in the higher value scope, adjust the Bottom Blowing flow, improved refining efficiency, shortened refining time.
Description of drawings
Fig. 1 is the ladle synoptic diagram that inserts the dipping cylinder.
Embodiment
The present invention is further detailed explanation below in conjunction with accompanying drawing and example.
A kind of method of refining that inserts the ladle eccentric bottom blown argon of dipping cylinder as shown in Figure 1, inserts a dipping cylinder 2, dipping cylinder 2 and bottom blowing pore 4 concentrics in ladle.Insert the ladleful 150t of dipping cylinder, ladle 3 back cut diameter 3154mm, ladle 3 lower port diameter 2781mm, ladle 3 interior high 3850mm, molten steel face 1 degree of depth 3130mm, bottom blowing pore 4 diameter 120mm, dipping cylinder 2 diameter dimensions are 500～1000mm, dipping cylinder 2 length 500～1200mm, wall thickness 5～20mm, dipping cylinder 2 depth of penetration are distance steel liquid level 200～700mm, bottom blowing pore 4 is positioned at apart from ladle 3 width between centers 1/2R positions, R refers to 3 times port radius of ladle, argon blowing rate scope 6～100Nm
3/ h; The ar blowing refining time range is 10～60min.
Claims (1)
1. method of refining of ladle eccentric bottom blown argon that inserts the dipping cylinder is characterized in that:
In ladle, insert a dipping cylinder, dipping cylinder and bottom blowing pore concentric, dipping cylinder depth of penetration is distance steel liquid level 150～1000mm, and the bottom blowing pore is positioned at apart from ladle width between centers 1/2R position, and R is port radius under the ladle, argon blowing rate 1～300Nm
3/ h; The ar blowing refining time is 10～60min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012105396294A CN103014240A (en) | 2012-12-12 | 2012-12-12 | Refining method of eccentric argon bottom blowing by inserting impregnation cylinder into ladle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012105396294A CN103014240A (en) | 2012-12-12 | 2012-12-12 | Refining method of eccentric argon bottom blowing by inserting impregnation cylinder into ladle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103014240A true CN103014240A (en) | 2013-04-03 |
Family
ID=47963351
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012105396294A Pending CN103014240A (en) | 2012-12-12 | 2012-12-12 | Refining method of eccentric argon bottom blowing by inserting impregnation cylinder into ladle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103014240A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6144118A (en) * | 1984-08-08 | 1986-03-03 | Nippon Steel Corp | Refining method of molten metal |
| JPH09170015A (en) * | 1995-12-20 | 1997-06-30 | Sumitomo Metal Ind Ltd | Refining furnace |
-
2012
- 2012-12-12 CN CN2012105396294A patent/CN103014240A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6144118A (en) * | 1984-08-08 | 1986-03-03 | Nippon Steel Corp | Refining method of molten metal |
| JPH09170015A (en) * | 1995-12-20 | 1997-06-30 | Sumitomo Metal Ind Ltd | Refining furnace |
Non-Patent Citations (1)
| Title |
|---|
| 金友林等: "CAS精炼钢包中气泡运动行为研究", 《钢铁》 * |
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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: 20130403 |