CN109868341A - A kind of device and method of full bottom-blown ladle refining liquid steel - Google Patents

A kind of device and method of full bottom-blown ladle refining liquid steel Download PDF

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Publication number
CN109868341A
CN109868341A CN201910177263.2A CN201910177263A CN109868341A CN 109868341 A CN109868341 A CN 109868341A CN 201910177263 A CN201910177263 A CN 201910177263A CN 109868341 A CN109868341 A CN 109868341A
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China
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ladle
steel
full bottom
full
blown
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CN201910177263.2A
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CN109868341B (en
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娄文涛
刘壮
王贺
朱苗勇
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Northeastern University China
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Northeastern University China
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Abstract

The invention belongs to steel refining technical field more particularly to a kind of device and methods of full bottom-blown ladle refining liquid steel.The device includes the ladle for liquid steel refining, the ladle includes steel ladle and bottom of steel ladle, the ladle side wall includes that refractory material is laid bricks, the bottom of steel ladle is located at the lower section of molten steel, and a full bottom blowing ventilated element is embedded in bottom of steel ladle, the outside of the full bottom blowing ventilated element is enclosed with steel bushing.When using the device, argon gas enters ladle by full bottom blowing ventilated element from ladle bottom, relative to traditional gas permeable brick, Argon Bubble Dispersed precipitate, to carry out uniform stirring to molten steel, promotes the homogenization of molten steel component and temperature inside entire ladle in full bottom-blown ladle refining process, accelerate slag gold interfacial reaction, and field trash in molten steel can be efficiently captured, achieve the purpose that refining liquid steel, and not will cause the secondary pollution of molten steel.

Description

A kind of device and method of full bottom-blown ladle refining liquid steel
Technical field
The invention belongs to the devices and side of steel refining technical field more particularly to a kind of full bottom-blown ladle refining liquid steel Method.
Background technique
With the development of society, higher and higher for the quality requirement of steel in the market, especially mould steel, big machinery With steel, midium-carbon steel and steels for pressure vessel use etc..The characteristics of these industries steel is that the degree of purity requirement to molten steel is stringent.This is just So that steel refining becomes essential link, wherein steel ladle bottom argon blowing refining is commonly used in steel refining.
During refinement outside-furnace, it is the inclusion floating in uniform molten steel chemical component and temperature, promotion steel, leads to Frequently with ladle bottom blowing argon gas, but conventional argon bottom-blowing will cause the formation of slag blister in the case where high flow capacity, and molten steel is caused to be inhaled Oxygen, nitrogen in receipts air, to cause the secondary pollution of molten steel, while cannot stir well in the case where low discharge Molten steel is excessively concentrated additionally, due to bubble distribution in traditional bottom-blown ladle, can not efficiently be captured so that BOTTOM ARGON BLOWING efficiency is reduced Except the field trash in molten steel.
Summary of the invention
(1) technical problems to be solved
For existing technical problem, the present invention provides a kind of device and method of full bottom-blown ladle refining liquid steel, Argon gas enters ladle by full bottom blowing ventilated element from ladle bottom, and Argon Bubble Dispersed precipitate is inside entire ladle, thus right Molten steel carries out uniform stirring, promotes the homogenization of molten steel component and temperature, accelerates slag gold interfacial reaction, and can efficiently capture steel Field trash in liquid achievees the purpose that refining liquid steel, and not will cause the secondary pollution of molten steel.
(2) technical solution
The present invention provides a kind of device of full bottom-blown ladle refining liquid steel, including the ladle for liquid steel refining, the steel Packet includes steel ladle and bottom of steel ladle, and the steel ladle includes that refractory material is laid bricks, and the bottom of steel ladle is located at the lower section of molten steel, And a full bottom blowing ventilated element is embedded in bottom of steel ladle, the outside of the full bottom blowing ventilated element is enclosed with steel bushing;
The full bottom blowing ventilated element includes component body and multiple supporting legs, and the component body is cylindrical or rotary table Shape, the multiple supporting leg are uniformly arranged in the bottom of component body, are formed between the full bottom blowing ventilated element and bottom of steel ladle Thin gas chamber.
Further, the refractory material is laid bricks between full bottom blowing ventilated element filled with tamping material.
Further, the height of the supporting leg is 1-50mm, and the thin gas chamber is identical as the height of supporting leg.
Further, it is embedded with slide gate nozzle unit on the full bottom blowing ventilated element, the slide gate nozzle unit includes Slide gate nozzle brick cup and slide gate nozzle.
Further, at least one is provided on the full bottom blowing ventilated element through the narrow of the full bottom blowing ventilated element Seam.
Further, the width of the slit is 0.05-0.5mm.
Further, the bottom of the thin gas chamber is connect with argon gas pipeline, and the argon gas pipeline is equipped with Non-return air valve, gas It flows through after Non-return air valve enters thin gas chamber and is uniformly distributed in thin gas chamber.
The present invention also provides a kind of method of the device of full bottom-blown ladle refining liquid steel using any of the above-described technical solution, Argon gas for blowing is sequentially entered inside full bottom blowing ventilated element and ladle by argon gas pipeline, to stir molten steel It mixes.
(3) beneficial effect
The device of the full bottom-blown ladle refining liquid steel of offer of the invention, argon gas pass through the ventilative member of full bottom blowing from ladle bottom Part enters ladle, to be stirred to molten steel, promotes the homogenization of molten steel component and temperature, reaches the mesh of refining liquid steel 's.It is small to overcome traditional BOTTOM ARGON BLOWING ladle air-blowing quantity under the conditions of soft blow, it is uneven to agitation of molten steel;Traditional BOTTOM ARGON BLOWING ladle exists Under the conditions of blowing by force, bubble forms bubble column in molten steel, and the top slag for pushing molten steel upper layer open forms slag blister, so that molten steel be caused to contact The problem of air is secondarily contaminated.
Full bottom blowing accomplishes while increasing tolerance so that molten steel liquid fluctuating is smaller, will not cause splash, improve peace Quan Xing alleviates the labor intensity of worker, and slag blister area is greatly reduced, and reduces the oxygen uptake of molten steel, inhales nitrogen, equal by disperse Even tiny bubble can effectively remove field trash, improve the quality and yield of alloy of molten steel.Meanwhile full bottom-blown ladle makes Dead zone is not present in molten steel in ladle, keeps agitation of molten steel abundant, improves quality of molten steel, accelerates refining rhythm, accelerate enterprise Production efficiency improves yield, improves the cleanliness of molten steel, improves steel product quality.Simultaneously in the feelings of identical air-blowing quantity Under condition, the full bottom-blown ladle duration of heat is shorter, reduces scattering and disappearing in refining process heat, has saved electric energy, reduced electricity Pole loss, reduces ton steel cost.
Detailed description of the invention
Fig. 1 is the schematic diagram of full bottom-blown ladle refining liquid steel device in embodiment 1;
Fig. 2 is the schematic diagram of bottom of steel ladle in embodiment 1;
Fig. 3 is the slit distribution map of full bottom blowing ventilated element in embodiment 1;
Fig. 4 is the slit distribution map of full bottom blowing ventilated element in embodiment 2;
Fig. 5 is the slit distribution map of full bottom blowing ventilated element in embodiment 3;
Fig. 6 is the slit distribution map of full bottom blowing ventilated element in embodiment 4.
[description of symbols]
1: ladle;2: refractory material is laid bricks;3: full bottom blowing ventilated element;4: tamping material;5: thin gas chamber;6: argon gas pipeline; 7: Non-return air valve;8: supporting leg;9: slit;10: slide gate nozzle brick cup;11: slide gate nozzle.
Specific embodiment
In order to preferably explain the present invention, in order to understand, with reference to the accompanying drawing, by specific embodiment, to this hair It is bright to be described in detail.
Embodiment 1
As shown in Figure 1, 2, the present embodiment provides a kind of devices of full bottom-blown ladle refining liquid steel, including are used for liquid steel refining Ladle 1, ladle 1 includes steel ladle and bottom of steel ladle, and steel ladle is laid bricks by refractory material 2 to be piled up, and bottom of steel ladle is located at The lower section of molten steel, and a full bottom blowing ventilated element 3 is embedded in bottom of steel ladle, full bottom blowing ventilated element 3 and bottom of steel ladle are big It is small equal, and the outside of full bottom blowing ventilated element 3 is enclosed with steel bushing.Refractory material is laid bricks and is filled out between 2 and full bottom blowing ventilated element 3 Filled with tamping material 4, the room of smashing material 4 is fixed position of the full bottom blowing ventilated element 3 in ladle 1 more, will not move.
Full bottom blowing ventilated element 3 includes that 8,16 supporting legs 8 of component body and supporting leg of truncated cone-shaped are evenly provided on element The bottom of ontology, it is sintering integrated with component body, thin gas chamber 5 is formed between full bottom blowing ventilated element 3 and bottom of steel ladle.Thin gas chamber 5 height depends on the height of supporting leg 8, and the height of supporting leg 8 is 50mm.Preferably, complete 3 material of bottom blowing ventilated element is fire proofed wood Material.
Slide gate nozzle unit is embedded on the full bottom blowing ventilated element, the slide gate nozzle unit includes slide gate nozzle seat Brick and slide gate nozzle.
As shown in figure 3, being provided with multiple slits 9 through full bottom blowing ventilated element 3, slit 9 in full bottom blowing ventilated element 3 Run through full bottom blowing ventilated element 3 with the mode setting of breaking joint, the width of slit 9 is 0.5mm.
It is also embedded with slide gate nozzle brick cup 10 on full bottom blowing ventilated element 3, the bottom of slide gate nozzle brick cup 10 is connected with cunning The dynamic mouth of a river 11, slide gate nozzle 11 is located at the outside of bottom of steel ladle, for accurately adjusting the water flow from ladle 1 to continuous casting production Amount, makes the molten steel flowed in and out reach balance, so that continuous casting operation be made to be easier to control.
The bottom of thin gas chamber 5 is connect with argon gas pipeline 6, and argon gas pipeline 6 is equipped with Non-return air valve 7.Argon gas passes through tunger tube Road 6 enters thin gas chamber 5, evenly distributes in thin gas chamber 5, subsequently into full bottom blowing ventilated element 3.It is equipped in argon gas pipeline 6 Non-return air valve 7 can control the entrance of argon gas by Non-return air valve 7 and keep the pressure in thin gas chamber 5.
When being refined using the purifier of the present embodiment, when ladle enters refining station, operator opens tunger tube The Non-return air valve being arranged on road is passed through argon gas, and argon gas enters thin gas chamber by Non-return air valve, forms linker, thin gas chamber internal pressure Power and overpressure are equal, and argon gas is distributed in thin gas chamber enters molten steel by the slit in full bottom blowing ventilated element, on bubble It rises and molten steel is stirred, since the dimension of slit distribution is very big, so distribution of the bubble in molten steel is very uniform, and then increase Ventilative tolerance, strengthens the stirring to molten bath, accelerates the efficiency being mingled in removal molten steel.
Embodiment 2
The present embodiment carries out liquid steel refining using device as shown in Figure 1, is embedded in one in bottom of steel ladle in the present embodiment Component body is cylindrical full bottom blowing ventilated element 3, and full bottom blowing ventilated element 3 is arranged in centered on the center of circle of bottom of steel ladle Radius be 81% region in.
As shown in figure 4, the slit 9 on full bottom blowing ventilated element 3 runs through full bottom blowing ventilated element with the mode setting of circumferential weld 3, the width of slit 9 is 0.05mm.
Embodiment 3
The present embodiment carries out liquid steel refining using device as shown in Figure 1, and the height of supporting leg 8 is 1mm in the present embodiment, entirely Bottom blowing ventilated element 3 is arranged in the region that the radius centered on the center of circle of bottom of steel ladle is 25%.
As shown in figure 5, the slit 9 on full bottom blowing ventilated element 3 runs through full bottom blowing ventilated element with the mode setting of vertical masonry joint 3, the width of slit 9 is 0.1mm.
Embodiment 4
The present embodiment carries out liquid steel refining using device as shown in Figure 1, is embedded in one in bottom of steel ladle in the present embodiment Full bottom blowing ventilated element 3, the region that the radius centered on the center of circle of bottom of steel ladle is 64% is arranged in full bottom blowing ventilated element 3 It is interior.
As shown in fig. 6, slit 9 be diameter 0.2mm duct, duct be evenly provided on full bottom blowing ventilated element 3 and Through full bottom blowing ventilated element 3.
The technical principle of the invention is described above in combination with a specific embodiment, these descriptions are intended merely to explain of the invention Principle shall not be construed in any way as a limitation of the scope of protection of the invention.Based on explaining herein, those skilled in the art It can associate with other specific embodiments of the invention without creative labor, these modes fall within this hair Within bright protection scope.

Claims (8)

1. a kind of device of full bottom-blown ladle refining liquid steel, including the ladle for liquid steel refining, which is characterized in that the ladle Including steel ladle and bottom of steel ladle, the steel ladle includes that refractory material is laid bricks, and the bottom of steel ladle is located at the lower section of molten steel, and A full bottom blowing ventilated element is embedded in bottom of steel ladle, the outside of the full bottom blowing ventilated element is enclosed with steel bushing;
The full bottom blowing ventilated element includes component body and multiple supporting legs, and the component body is cylindrical or truncated cone-shaped, institute It states multiple supporting legs to be uniformly arranged in the bottom of component body, forms thin gas between the full bottom blowing ventilated element and bottom of steel ladle Room.
2. the device of full bottom-blown ladle refining liquid steel according to claim 1, which is characterized in that the refractory material is laid bricks Filled with tamping material between full bottom blowing ventilated element.
3. the device of full bottom-blown ladle refining liquid steel according to claim 1, which is characterized in that the height of the supporting leg is 1-50mm。
4. the device of full bottom-blown ladle refining liquid steel according to claim 1, which is characterized in that the ventilative member of the full bottom blowing Slide gate nozzle unit is embedded on part, the slide gate nozzle unit includes slide gate nozzle brick cup and slide gate nozzle.
5. the device of full bottom-blown ladle refining liquid steel according to claim 1, which is characterized in that the ventilative member of the full bottom blowing At least one slit for running through the full bottom blowing ventilated element is provided on part.
6. the device of full bottom-blown ladle refining liquid steel according to claim 5, which is characterized in that the width of the slit is 0.05-0.5mm。
7. the device of full bottom-blown ladle refining liquid steel according to claim 1, which is characterized in that the bottom of the thin gas chamber It is connect with argon gas pipeline, the argon gas pipeline is equipped with Non-return air valve.
8. a kind of method of the device using the full bottom-blown ladle refining liquid steel as described in any in claim 1-7, feature Be, the argon gas for blowing is sequentially entered inside full bottom blowing ventilated element and ladle by argon gas pipeline, thus to molten steel into Row stirring.
CN201910177263.2A 2019-03-08 2019-03-08 Device and method for refining molten steel by full-bottom blowing ladle Active CN109868341B (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111719034A (en) * 2019-03-21 2020-09-29 宝山钢铁股份有限公司 Air blowing opening structure suitable for converter bottom
CN112024860A (en) * 2020-09-01 2020-12-04 三鑫重工机械有限公司 Steel ladle for 4D printing of steel ingot and pouring system

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE20100976U1 (en) * 2001-01-19 2001-12-06 Beck & Kaltheuner Fa Flush for metallurgical vessels
CN2782703Y (en) * 2005-03-28 2006-05-24 蓝亭 Molten steel leakage proof device with permeation firebrick
CN101574730A (en) * 2009-06-16 2009-11-11 武汉科技大学 Continuous casting method of pouring box air curtain retaining wall clean molten steel
CN103555889A (en) * 2013-10-24 2014-02-05 钢铁研究总院 Device and method for quickly removing occluded foreign substances in molten steel
CN105087870A (en) * 2015-08-31 2015-11-25 濮阳濮耐高温材料(集团)股份有限公司 Blowing element, combined blowing brick and manufacturing method of combined blowing brick

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE20100976U1 (en) * 2001-01-19 2001-12-06 Beck & Kaltheuner Fa Flush for metallurgical vessels
CN2782703Y (en) * 2005-03-28 2006-05-24 蓝亭 Molten steel leakage proof device with permeation firebrick
CN101574730A (en) * 2009-06-16 2009-11-11 武汉科技大学 Continuous casting method of pouring box air curtain retaining wall clean molten steel
CN103555889A (en) * 2013-10-24 2014-02-05 钢铁研究总院 Device and method for quickly removing occluded foreign substances in molten steel
CN105087870A (en) * 2015-08-31 2015-11-25 濮阳濮耐高温材料(集团)股份有限公司 Blowing element, combined blowing brick and manufacturing method of combined blowing brick

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111719034A (en) * 2019-03-21 2020-09-29 宝山钢铁股份有限公司 Air blowing opening structure suitable for converter bottom
CN112024860A (en) * 2020-09-01 2020-12-04 三鑫重工机械有限公司 Steel ladle for 4D printing of steel ingot and pouring system

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