CN209636272U - A kind of converter tapping process improves the device of molten steel uniformity - Google Patents
A kind of converter tapping process improves the device of molten steel uniformity Download PDFInfo
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- CN209636272U CN209636272U CN201920321527.2U CN201920321527U CN209636272U CN 209636272 U CN209636272 U CN 209636272U CN 201920321527 U CN201920321527 U CN 201920321527U CN 209636272 U CN209636272 U CN 209636272U
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Abstract
The utility model discloses the devices that a kind of converter tapping process improves molten steel uniformity, including the tracheae for being detachably fixed connection with converter tapping wing furnace body and the gas source being connect with tracheae, the end of tracheae has spray head, and the setting angle of spray head is when meeting converter tapping, the gas of spray head is sprayed in predetermined angle to molten steel surface, and molten steel surface is made to generate transverse movement.Using the device, in converter tapping, the control switch of gas source is opened to intratracheal input gas, gas is acted on through spray head and is sprayed, and it sprays in predetermined angle to molten steel surface, the transverse movement for making molten steel surface generate vertical convection current and the generation of molten steel surface gas that transverse movement, the vertical flowing of ladle bottom blowing generation, and then bottom blown gas generate makes molten steel in turbulent motion.Molten steel motion mode becomes turbulent flow from convection current in ladle, improves molten steel uniformity, reduces postorder composition adjustment amount and sentences useless heat because ingredient is exceeded, reduces line feeding cost and sentences useless loss, can effectively reduce smelting cost.
Description
Technical field
The utility model relates to metallurgical technology fields, and it is equal to improve molten steel more specifically to a kind of converter tapping process
The device of even property.
Background technique
Pneumatic steelmaking (converter steelmaking) be using molten iron, steel scrap, ferroalloy as primary raw material, not by
External energy, chemical reaction generates heat and completes to make steel in converter between the physical thermal and iron liquid component of iron liquid itself
Journey.
Currently, since molten steel in tapping process of converter is moved in ladle in convection type there is movement dead angle in convective motion,
Cause molten steel uniformity poor, after postorder carries out molten steel composition adjustment, molten steel composition control precision and the slab degree that homogenizes are low,
It is affected to product quality and smelting cost.
Further, since molten steel uniformity is poor after tapping, it, can be inaccurate because of adjustment amount when later process carries out composition adjustment
Really, molten steel composition is not achieved control and requires, and whole furnace molten steel is caused to sentence useless quality accident.
It is current this field in conclusion how to efficiently solve the problems such as molten steel in tapping process of converter uniformity is poor
Technical staff's problem to be solved.
Utility model content
In view of this, the purpose of this utility model is to provide the dresses that a kind of converter tapping process improves molten steel uniformity
It sets, which can efficiently solve the poor problem of molten steel in tapping process of converter uniformity.
In order to achieve the above object, the utility model provides the following technical solutions:
A kind of converter tapping process improves the device of molten steel uniformity, including for detachably solid with converter tapping wing furnace body
Surely the tracheae connected and the gas source connecting with the tracheae, the end of the tracheae have spray head, and the established angle of the spray head
When degree meets the converter tapping, the gas that the spray head sprays is sprayed in predetermined angle to molten steel surface, produces molten steel surface
Raw transverse movement.
Preferably, above-mentioned converter tapping process improves in the device of molten steel uniformity, and the setting angle of the spray head meets
When the converter tapping, the orifice center line and molten steel surface horizontal line intersection range of the spray head are 25 ° -35 °.
Preferably, above-mentioned converter tapping process improves in the device of molten steel uniformity, and the setting angle of the spray head meets
When the converter tapping, the orifice center line and the molten steel surface horizontal line angle of cut of the spray head are 30 °.
Preferably, above-mentioned converter tapping process improves in the device of molten steel uniformity, and the spray orifice shape of the spray head is to draw
Wa Er type.
Preferably, above-mentioned converter tapping process improves in the device of molten steel uniformity, including described in multiple be set side by side
One end of tracheae, each tracheae is connected to the gas source, and the other end is respectively arranged with the spray head.
Preferably, above-mentioned converter tapping process improves in the device of molten steel uniformity, and the gas source is the Bottom Blowing of ladle
Source.
The device that converter tapping process provided by the utility model improves molten steel uniformity includes tracheae and gas source.Wherein,
Tracheae can be detachably fixed with converter tapping wing furnace body and connect, and one end of tracheae is connect with gas source, and the other end has spray head,
When the setting angle of spray head meets converter tapping, the gas of spray head is sprayed in predetermined angle to molten steel surface, produces molten steel surface
Raw transverse movement, and then the vertical flowing generated with ladle bottom blowing interweaves, and tapping process molten steel motion mode is made to have convection current to become
Turbulent motion.
The device that molten steel uniformity is improved using converter tapping process provided by the utility model, in converter tapping, gas
The control switch in source is opened to intratracheal input gas, and gas is acted on through spray head and sprayed, and is sprayed in predetermined angle to molten steel
Surface makes molten steel surface generate transverse movement, and ladle bottom blowing generates vertical flowing, so the vertical convection current that generates of bottom blown gas with
The transverse movement that molten steel surface gas generates makes molten steel in turbulent motion.Molten steel motion mode becomes turbulent flow from convection current in ladle,
Molten steel uniformity is improved, postorder composition adjustment amount is reduced and sentences useless heat because ingredient is exceeded, reduce line feeding cost and sentences useless loss,
It can effectively reduce smelting cost.And can prevent because molten steel uniformity is poor, postorder composition adjustment amount causes greatly liquid steel temperature is low to draw
There are the accidents such as casting machine shutdown in hair casting machine nozzle clogging.Easy to operate, easy to use, controllability is strong.
Detailed description of the invention
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor
Under, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is the structure that the converter tapping process of one specific embodiment of the utility model improves the device of molten steel uniformity
Schematic diagram；
Fig. 2 is the partial enlargement diagram of tracheae in Fig. 1.
It is marked in attached drawing as follows:
1, tracheae, 2, molten steel surface, 3, converter, 4, bottom blowing gas source, 5, spray head.
Specific embodiment
The utility model embodiment discloses a kind of device of converter tapping process raising molten steel uniformity, to improve molten steel
Uniformity and product quality reduce smelting cost.
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
Every other embodiment obtained, fall within the protection scope of the utility model.
Fig. 1 is that the converter tapping process of one specific embodiment of the utility model improves molten steel uniformity referring to FIG. 1-2,
Device structural schematic diagram；Fig. 2 is the partial enlargement diagram of tracheae 1 in Fig. 1.
In a specific embodiment, converter tapping process provided by the utility model improves the device packet of molten steel uniformity
Include tracheae 1 and gas source.
Wherein, tracheae 1 can be detachably fixed with the tapping wing furnace body of converter 3 and connect, and one end of tracheae 1 and gas source connect
It connects, the other end has spray head 5.Namely tracheae 1 is individual components, and when use is mounted on converter 3 and taps on wing furnace body.It does not use
When, then it can be removed.
When the setting angle of spray head 5 meets the tapping of converter 3, the gas that spray head 5 sprays is sprayed in predetermined angle to molten steel table
Face 2 makes molten steel surface 2 generate transverse movement, and then the vertical flowing generated with ladle bottom blowing interweaves, and transports tapping process molten steel
Flowing mode has convection current to become turbulent motion.It should be noted that the setting angle of spray head 5 can both pass through the curved of tracheae 1 herein
Bent angle can also be controlled by spray head 5 relative to the angle of tracheae 1 with controlling, or the co- controlling with the two.Tool
The size of body predetermined angle can be accordingly arranged as needed, so that the gas that spray head 5 sprays makes molten steel surface 2 generate lateral fortune
It is dynamic, and the vertical flowing generated with ladle bottom blowing interweaves, and makes tapping process molten steel motion mode have convection current to become turbulent motion, mentions
High molten steel uniformity reduces postorder composition adjustment amount, improves slab and homogenizes degree and product quality.Preferably, the spray of spray head 5
Hole shape is Laval, to improve gas to the impact capacity of molten steel.
The diameter of spray head 5 can be accordingly arranged according to ladle size and 3 molten steel amount of converter, be not especially limited herein.Spray head 5
Mounting height can be accordingly arranged according to the distance on edge on 3 furnace body to ladle of converter when tapping so that the gas energy that spray head 5 sprays
Molten steel surface 2 is enough set to generate transverse movement.The gas pressure that spray head 5 sprays specifically can be set to 0.45mpa.The gas of ejection
Flow can be accordingly arranged according to molten steel amount.
The control switch that can be specifically carried by gas source controls 5 jet of spray head or stopping as needed can also be independent
Gas source control switch is set to control 5 jet of spray head or stopping.Preferably, the control system connecting with control switch is separately provided
System, is opened or closed with automatically controlling it.Control system can be placed in tapping steel room.
The device that molten steel uniformity is improved using converter tapping process provided by the utility model, when converter 3 is tapped, gas
The control switch in source is opened and inputs gas into tracheae 1, and gas is acted on through spray head 5 and sprayed, and sprays in predetermined angle to steel
Water surface 2 makes molten steel surface 2 generate transverse movement, and ladle bottom blowing generates vertical flowing, and then bottom blown gas generation is vertical right
The transverse movement that stream is generated with 2 gas of molten steel surface makes molten steel in turbulent motion.Molten steel motion mode is become from convection current in ladle
Turbulent flow improves molten steel uniformity, reduces postorder composition adjustment amount and sentences useless heat because ingredient is exceeded, reduces line feeding cost and sentences useless
Loss, can effectively reduce smelting cost.And can prevent because molten steel uniformity is poor, postorder composition adjustment amount leads to greatly liquid steel temperature
There are the accidents such as casting machine shutdown in low initiation casting machine nozzle clogging.Easy to operate, easy to use, controllability is strong.
Specifically, when the setting angle of spray head 5 meets the tapping of converter 3, the orifice center line and 2 water of molten steel surface of spray head 5
Horizontal line intersection range is 25 ° -35 °.Namely pass through the setting of 5 installation direction of spray head, the spray of spray head 5 when control converter 3 is tapped
Centerline hole and 2 horizontal line intersection range of molten steel surface are 25 ° -35 °, so that gas is sprayed with corresponding angle in molten steel surface 2,
Preferably make molten steel turbulent with bottom blown gas mating reaction.Preferably, the orifice center line and molten steel of spray head 5 when converter 3 is tapped
The 2 horizontal line angle of cut of surface is 30 °.
On the basis of the various embodiments described above, including multiple tracheaes 1 being set side by side, one end of each tracheae 1 connects with gas source
Logical, the other end is respectively arranged with spray head 5.It should be noted that herein multiple include two and more than two.Multiple spray heads 5
Collective effect molten steel surface 2 into ladle sprays gas.Specifically, multiple spray heads 5 can be with co- controlling, it can also be individually
Control.
In the above embodiments, gas source is the bottom blowing gas source 4 of ladle.Namely utilize the bottom blowing gas source 4 of ladle to spray
Mouth gas supply, it is not necessary that gas source is separately provided, overall structure is more simple, has saved cost.Certainly, it can also individually set as needed
Gas source is set as nozzle gas supply.
For the ease of controlling gas pressure, tracheae 1 can connect pressure control and regulating system, specific pressure control and tune
Refer to the prior art for structure and working principle of section system etc., and details are not described herein again.
The device of molten steel uniformity is improved in tapping using the converter tapping process, comprising the following steps:
S1: converter 3 is shaken to tapping side；
Converter 3 is shaken to tapping side first, prepares tapping.Specifically can be after each control parameter of 3 terminal of converter be up to standard, it will
Converter 3 is shaken to tapping side.The setting of each control parameter and corresponding standard can refer to the tapping work of converter 3 conventional in the prior art
Skill is controlled, and is not especially limited herein.
S2: it opens ladle bottom blowing gas source 4 and switchs；
It opens ladle bottom blowing gas source 4 before tapping to switch, in order to which bottom blown gas enters ladle in tapping process.
S3: tapping, bottom blown gas enter ladle, and bottom blown gas kinetic energy makes molten steel generate vertical convective motion；
Bottom blown gas can specifically enter ladle by bottom-blown air brick, and molten steel generates vertical right under bottom blown gas kinetic energy
Stream movement.
S4: when the tapping of converter 3 is to 2/3, passes through the spray head 5 being mounted on 3 furnace body of converter molten steel surface 2 into ladle and spray
Gas, gas kinetic energy make molten steel generate transverse movement, the cross that the vertical convection current and 2 gas of molten steel surface that bottom blown gas generates generate
Make molten steel in turbulent motion to movement.
Specifically, into ladle, molten steel surface 2 sprays gas in above-mentioned steps S4, it may include: to use to be fixedly installed in
Spray head 5 on 3 furnace body of the converter molten steel surface 2 into ladle sprays gas, and the orifice center line of spray head 5 and 2 water of molten steel surface
Horizontal line intersection range is 25 ° -35 °.The setting for namely passing through 5 installation direction of spray head, controls the orifice center line and steel of spray head 5
2 horizontal line intersection range of water surface is 25 ° -35 °, so that gas is sprayed in molten steel surface 2, preferably and bottom blowing with corresponding angle
Gas interactions effect keeps molten steel turbulent.Preferably, the orifice center line of spray head 5 and the 2 horizontal line angle of cut of molten steel surface are 30 °.
Further, using the spray head 5 being fixedly installed on 3 furnace body of converter, into ladle, molten steel surface 2 sprays gas, tool
Body includes: that into ladle, molten steel surface 2 sprays gas using at least two spray heads 5 being fixedly installed on 3 furnace body of converter.Specifically
Each spray head 5 can be arranged with parallel side-by-side, with collective effect.When being provided with multiple spray heads 5, multiple spray heads 5 can be controlled jointly
System, can also individually control.
Individually below by taking converter tapping process improves a preferred embodiment of the device of molten steel uniformity as an example, and with
A pair of of ratio control explanation.
Embodiment 1
120 tons of tappings of oxygen top and bottom combined blown converter 3 and molten steel composition, temperature adjustment operation, comprising the following steps:
1) HRB400E-2 steel grade is smelted, 0.23% is limited in steel grade carbon content, 1.25% is limited in manganese ingredient, inlet temperature is wanted
Ask it is middle limit 1580 DEG C, out-station temperature require in limit 1560 DEG C, this heat converter 3 draw endpoint carbon content 0.10%, 1650 DEG C of temperature,
Other parameters are up to standard, and converter 3 is shaken to tapping side and is tapped；
2) it opens ladle bottom blowing gas source 4 before tapping to switch, tapping process gas enters ladle, gas by bottom-blown air brick
Flow is 0.01m3/t.min, and molten steel generates vertical convective motion under bottom blown gas kinetic energy；
3) when the tapping of converter 3 is to 2/3, into ladle, molten steel surface 2 sprays gas, and gas flow is set as 0.02m3/
T.min, by molten steel surface 2 in gas injection to ladle, molten steel generates transverse movement under gas kinetic energy；
4) silicomangan 2200kg, carburant 120kg is added in tapping process；
5) tapping, which finishes, closes 3 furnace body upper nozzle of converter, 5 gas switch, and buggy ladle is opened to refining position and carries out ingredient, temperature
Degree adjustment.
6) molten steel is 1582 DEG C to refining position liquid steel temperature, and sampling analysis carbon content of molten steel is 0.231%, and manganese content is
1.254%, ingredient is up to standard, and Argon is hung to casting machine and casts for 1560 DEG C of thermometric after five minutes, and slab analysis carbon content is
0.231%, manganese content 1.254%, continuous casting is smooth.
Comparative example 1
120 tons of tappings of oxygen top and bottom combined blown converter 3 and the adjustment operation of molten steel composition temperature, comprising the following steps:
1) HRB400E-2 steel grade is smelted, 0.23% is limited in steel grade carbon content, 1.25% is limited in manganese ingredient, inlet temperature is wanted
Ask it is middle limit 1580 DEG C, out-station temperature require in limit 1560 DEG C, this heat converter 3 draw endpoint carbon content 0.10%, 1650 DEG C of temperature,
Other parameters are up to standard, and converter 3 is shaken to tapping side and is tapped；
2) it opens ladle bottom blowing gas source 4 before tapping to switch, tapping process gas enters ladle, gas by bottom-blown air brick
Flow is 0.01m3/t.min, and molten steel generates vertical convective motion under bottom blown gas kinetic energy；
3) silicomangan 2200kg, carburant 120kg is added in tapping process；
4) tapping, which finishes, opens buggy ladle to refining position, and liquid steel temperature is 1583 DEG C, and sampling analysis carbon content of molten steel is
0.217%, manganese content 1.214% carries out line feeding adjusting component because ingredient does not reach middle limit, and carbon line and manganese line amount are respectively
33kg, 112kg, Argon are hung to casting machine and cast for 1555 DEG C of thermometric after five minutes, and it is 0.248% that slab, which analyzes carbon content, and manganese contains
Amount is 1.284%, and continuous casting latter temperature is low, and molten steel melts down 6.8t.
Embodiment 1 is melted down cost with 1 composition adjustment of comparative example and molten steel to compare, the results are shown in Table 1.
Table 1 stays the quantity of slag, next heat outlet temperature control situation and deoxidier consumption comparison
| Carbon line cost, member | Manganese line cost, member | Molten steel cost is melted down, member | |
| Embodiment 1 | 0 | 0 | 0 |
| Comparative example 1 | 99 | 784 | 1360 |
Each embodiment in this specification is described in a progressive manner, the highlights of each of the examples are with other
The difference of embodiment, the same or similar parts in each embodiment may refer to each other.
The foregoing description of the disclosed embodiments can be realized professional and technical personnel in the field or using originally practical new
Type.Various modifications to these embodiments will be readily apparent to those skilled in the art, and determine herein
The General Principle of justice can be realized in other embodiments without departing from the spirit or scope of the present utility model.Cause
This, the present invention will not be limited to the embodiments shown herein, and is to fit to and principles disclosed herein
The widest scope consistent with features of novelty.
Claims (6)
1. the device that a kind of converter tapping process improves molten steel uniformity, which is characterized in that including being used for and converter tapping wing furnace
The gas source that body is detachably fixed the tracheae of connection and connect with the tracheae, the end of the tracheae have spray head, and the spray
When the setting angle of head meets the converter tapping, the gas that the spray head sprays is sprayed in predetermined angle to molten steel surface, is made
Molten steel surface generates transverse movement.
2. the device that converter tapping process according to claim 1 improves molten steel uniformity, which is characterized in that the spray head
Setting angle when meeting the converter tapping, orifice center line and the molten steel surface horizontal line intersection range of the spray head are
25°-35°。
3. the device that converter tapping process according to claim 1 improves molten steel uniformity, which is characterized in that the spray head
Setting angle when meeting the converter tapping, the orifice center line and the molten steel surface horizontal line angle of cut of the spray head are 30 °.
4. the device that converter tapping process according to claim 1-3 improves molten steel uniformity, which is characterized in that
The spray orifice shape of the spray head is Laval.
5. the device that converter tapping process according to claim 1-3 improves molten steel uniformity, which is characterized in that
Including multiple tracheaes being set side by side, one end of each tracheae is connected to the gas source, and the other end is respectively arranged with
The spray head.
6. the device that converter tapping process according to claim 1-3 improves molten steel uniformity, which is characterized in that
The gas source is the bottom blowing gas source of ladle.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109735681A (en) * | 2019-03-13 | 2019-05-10 | 山东钢铁股份有限公司 | A kind of method and apparatus that converter tapping process improves molten steel uniformity |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109735681A (en) * | 2019-03-13 | 2019-05-10 | 山东钢铁股份有限公司 | A kind of method and apparatus that converter tapping process improves molten steel uniformity |
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