CN106167844A - A kind of bottom blowing pattern autocontrol method of combined blown converter - Google Patents
A kind of bottom blowing pattern autocontrol method of combined blown converter Download PDFInfo
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- CN106167844A CN106167844A CN201610741393.0A CN201610741393A CN106167844A CN 106167844 A CN106167844 A CN 106167844A CN 201610741393 A CN201610741393 A CN 201610741393A CN 106167844 A CN106167844 A CN 106167844A
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
- C21C5/30—Regulating or controlling the blowing
- C21C5/35—Blowing from above and through the bath
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Abstract
The invention discloses the bottom blowing mode control method of a kind of combined blown converter, control method is for the iron making stage in combined blown converter, the blowing stage, the deslagging stage, point blows the stage, thermometric sample phase, loitering phase, tapping stage and spatter the botton blowing operation in slag stage and be controlled, for different steel types and endpoint carbon content scope, to the Bottom Blowing source category in each stage botton blowing operation, air supply intensity, gassing time is adjusted, obtain corresponding bottom blowing pattern, and the control knob of corresponding different bottom blowing pattern is set on control system operation interface, bottom blowing pattern is selected by clicking on control knob.The present invention is by increasing converting process each stage, the supply gas pressure pattern the Automation Design of each reaction phase and application, the effective dynamic conditions improving existing converter molten pool, improve uniformity and the stability of temperature of converter terminal molten bath composition, blown converter number after minimizing, reduce blow loss, and decrease the magnesia material addition of furnace retaining, save the cost of resistance to material.
Description
Technical field
The present invention relates to converter steeling technology field, the bottom blowing pattern autocontrol method of a kind of combined blown converter.
Background technology
Converter is currently used most common steelmaking equipment, and pneumatic steelmaking is with molten iron, steel scrap, ferroalloy for the most former
Material, not by external energy, complete in converter by chemical reaction generation heat between the physical thermal of ferrum liquid itself and ferrum liquid component
Become steelmaking process.Mainly there are oxygen top-blown converter, top and bottom combined blown converter etc..
For top and bottom combined blown converter, application the most generally top blowing oxygen, the technique of bottom blowing noble gas at present.Right
In this technique, along with converting process is carried out, inside Converter, can occur that silicomanganese reacts phase, phase in reaction between carbon and oxygen beginning, carbon oxygen successively
React in the different reaction phases such as violent phase, reaction between carbon and oxygen latter stage, the converter of differential responses phase due to oxygen top blown and formed
Dynamic conditions be different.The air demand of existing bottom-blowing of converter control model is single, causes the power in differential responses period
Conditional fluctuation is big, to such an extent as to occurs silicomanganese reaction phase dynamic conditions not enough, initial stage slag making, slagging phenomenon slowly occurs,
And too big due to dynamic conditions in the reaction between carbon and oxygen violent phase, there will be again the steel-slag blanket carrying scope beyond design heat size ratio
Phenomenon, be greatly increased that slag is excessive and the probability of metallicity splash.Simultaneously as the dynamic conditions of converter terminal not enough and
Causing endpoint molten steel oxidisability uneven, molten steel carbon component is uneven.For mild steel, in the case of furnace bottom rising, do not have
There is good blowing later stage dynamic conditions so that the fluctuation of finished product carbon content is big, causes after-blow heat to increase, and iron loss increases, and adds
Expenses of labour raises.
Accordingly, it would be desirable to the bottom blowing pattern of combined blown converter is adjusted, to adapt to different smelting conditions and process requirements.
Summary of the invention
The technical issues that need to address of the present invention are to provide the bottom blowing pattern autocontrol method of a kind of combined blown converter, pass through
Set each stage, each bottom blowing gas pressure pattern reacting the phase targetedly, and carry out the Automation Design and application, it is achieved turn
The stable operation of stove, it is ensured that rhythm of production is smooth and easy, reduces the labor intensity safeguarding working of a furnace cost and personnel.
For solving above-mentioned technical problem, the technical solution adopted in the present invention is:
A kind of bottom blowing mode control method of combined blown converter, described control method for the iron making stage in combined blown converter,
Blowing stage, deslagging stage, point blow stage, thermometric sample phase, loitering phase, tapping stage and spatter the bottom blowing work in slag stage
Industry is controlled, for different steel types and endpoint carbon content scope, to the Bottom Blowing source category in each stage botton blowing operation,
Air supply intensity, gassing time are adjusted, and obtain corresponding bottom blowing pattern, and arrange correspondence not on control system operation interface
With the control knob of bottom blowing pattern, select bottom blowing pattern by clicking on control knob.
Further improvement is that of technical solution of the present invention: described bottom blowing source of the gas is nitrogen or argon, the quantity of bottom blowing gun
It it is 3～6.
Further improvement is that of technical solution of the present invention: described bottom blowing gas intensity is 0.02m3/ (t min)～
0.1m3/(t·min)。
Further improvement is that of technical solution of the present invention: described endpoint carbon content scope be divided into carbon content ＜ 0.10%,
0.10%≤carbon content≤0.20%, 0.20% 3 scope of carbon content ＞.
Further improvement is that of technical solution of the present invention: described control method is concrete for stage each in combined blown converter
Control is,
1) the iron making stage, select Bottom Blowing source category, regulate air supply intensity, carry out this stage according to the gassing time set
Botton blowing operation；
2) the blowing stage, after the iron making stage completes, with oxygen supply by lance as switching node, Bottom Blowing source category, regulation are selected
Air supply intensity, carries out the botton blowing operation in this stage according to the gassing time set；
3) the deslagging stage, after the blowing stage completes, play rifle as switching node with oxygen rifle, select Bottom Blowing source category, regulation
Air supply intensity, carries out the botton blowing operation in this stage according to the gassing time set；
4) blow the stage, after the deslagging stage completes, with oxygen rifle secondary oxygen supply as switching node, select Bottom Blowing source category,
Regulation air supply intensity, carries out the botton blowing operation in this stage according to the gassing time set；
5) thermometric sample phase, point is after the stage of blowing completes, and to start sublance as switching node, selects Bottom Blowing source category,
Regulation air supply intensity, carries out the botton blowing operation in this stage according to the gassing time set；
6) loitering phase, after thermometric sample phase completes, plays rifle as switching node with sublance, selects Bottom Blowing source category,
Regulation air supply intensity, carries out the botton blowing operation in this stage according to the gassing time set；
7) tapping the stage, after loitering phase completes, fascinate backward with converter 55 degree as switching node, select bottom blowing source of the gas kind
Class, regulates air supply intensity, carries out the botton blowing operation in this stage according to the gassing time set；
8) spatter the slag stage, after the tapping stage completes, reset to vertical state as switching node with converter, select bottom blowing source of the gas
Kind, regulates air supply intensity, carries out spattering slag operation, spatters after slag operation completes, and converter enters next round bottom blowing and controls process.
Further improvement is that of technical solution of the present invention: described step 2) the blowing stage comprise some height and controlled
Journey, described sub-control process divides with gassing time for node and controls.
Further improvement is that of technical solution of the present invention: described deslagging stage and point blow and arrange follow-up blowing between the stage
And/or thermometric sample phase, the process conditions of described follow-up blowing are identical with the process conditions of blowing.
Further improvement is that of technical solution of the present invention: described control method stirs operator scheme and in operation after also including
Stir button after correspondence is set on interface, described after to stir the air supply intensity of operation be 0.09m3/ (t min), described after stir operation
It is arranged on the latter stage a little blowing the stage.
Owing to have employed technique scheme, the technological progress that the present invention obtains is:
The present invention by increasing converting process each stage, the supply gas pressure pattern the Automation Design of each reaction phase and application,
The effective dynamic conditions improving existing converter molten pool, improves the uniformity of converter terminal molten bath composition and stablizing of temperature
Property, blown converter number after minimizing, reduces blow loss, and decreases the magnesia material addition of furnace retaining, save the cost of resistance to material.Reduce in year and blow
Damage and save the about potentiation 1,000,000 yuan of magnesia material.The present invention also achieves docks with the perfect of former bottom blowing equipment (containing gas piping).
The present invention is directed in converter silicomanganese reaction phase, phase in reaction between carbon and oxygen beginning, reaction between carbon and oxygen violent phase, reaction between carbon and oxygen latter stage
Each stage, set segmentation supply transformation automatic control system, can improve production operation efficiency, reduce blow loss, reduce into
The magnesia material of stove, control cost, promotion converter terminal stability, it is ensured that rhythm of production is smooth and easy, reduces and safeguards working of a furnace cost and personnel
Labor intensity.
The present invention is applicable to prestressing force steel, carbon steel, cord class, bearing class, the bottom blowing pattern of special cold-heading class steel
Controlling, by setting automatic mode programme-control, worker selects " pattern " to complete correspondence the most simply, accurately by computer
The model selection of steel grade, eliminates valve conversion, valve opening regulation, all too many levels of gas pressure confirmation, reduces worker
Labor intensity, decrease the labor intensity of maintenance time and maintainer, improve upkeep operation efficiency more than 3 times, steel-making
Operation steel technology significantly declines, and enters furnace charge and reduces, has greatly saved cost.
Detailed description of the invention
The bottom blowing mode control method of a kind of combined blown converter disclosed by the invention, control method is for converting in combined blown converter
Ferrum stage, blowing stage, deslagging stage, point blow stage, thermometric sample phase, loitering phase, tapping stage and spatter the slag stage
Botton blowing operation be controlled, for different steel types and endpoint carbon content scope, to the bottom blowing in each stage botton blowing operation
Source of the gas kind, air supply intensity, gassing time are adjusted, and obtain corresponding bottom blowing pattern, and on control system operation interface
The control knob of corresponding different bottom blowing pattern is set, selects bottom blowing pattern by clicking on control knob.
The bottom blowing source of the gas that the present invention uses is nitrogen or argon, and the quantity of bottom blowing gun is 3～6.Concrete feelings can also be regarded
Condition selects other kinds of gas.Bottom blowing gas intensity is 0.02m3/ (t min)～0.1m3/(t·min)。
The endpoint carbon content scope that the present invention is directed to be divided into carbon content ＜ 0.10%, 0.10%≤carbon content≤0.20%,
0.20% 3 scope of carbon content ＞.
Below in conjunction with embodiment, the present invention is described in further details:
Embodiment 1
The present embodiment, for common ER class steel, endpoint carbon content ＜ 0.10%, is designated as Mode A.
Each stage of control process particularly as follows:
1) the iron making stage, selecting nitrogen is 0.05m as bottom blowing source of the gas, regulation air supply intensity3/ (t min), control into
The botton blowing operation in this stage of row, the gassing time in this stage is 5min；This stage normally starts from after spattering the slag stage, specifically
After starting from spattering slag stopping bottom blowing.
2) the blowing stage, after the iron making stage completes, with oxygen supply by lance as switching node, do not switch source of the gas kind, continue choosing
Select nitrogen as bottom blowing source of the gas.
The blowing stage of the present embodiment comprises 3 sub-control processes, and the first subprocess regulation air supply intensity is 0.07m3/
(t min), the second subprocess regulation air supply intensity is 0.05m3/ (t min), the 3rd subprocess regulation air supply intensity is
0.07m3/ (t min), sub-control process divides with the time for node, the gassing time between subprocess be 5min and
6min, carries out the botton blowing operation in this stage successively.
3) the deslagging stage, after the blowing stage completes, play rifle as switching node with oxygen rifle, do not switch source of the gas kind, continue choosing
Select nitrogen as bottom blowing source of the gas.Regulation air supply intensity is 0.03m3/ (t min), carries out the botton blowing operation in this stage, this stage
Gassing time be 3min.
4) blow the stage, after the deslagging stage completes, with oxygen rifle secondary oxygen supply as switching node, do not switch source of the gas kind, continue
Continuous selection nitrogen is as bottom blowing source of the gas.Regulation air supply intensity is 0.07m3/ (t min), carries out the botton blowing operation in this stage, this
The gassing time in stage is 1min.
Blow latter stage in stage at point, stir button after click, after startup, stir operation, now air supply intensity be converted to into
0.09m3/ (t min) to improve the dynamic conditions of existing converter molten pool, follow-up tapping steel.
5) thermometric sample phase, point is after the stage of blowing completes, and to start sublance as switching node, does not switch source of the gas kind, continues
Continuous selection nitrogen is as bottom blowing source of the gas.Regulation air supply intensity is 0.03mm3/ (t min), carries out the botton blowing operation in this stage, this
The gassing time in stage is 3min.
6) loitering phase, after thermometric sample phase completes, plays rifle as switching node with sublance, does not switch source of the gas kind, continue
Continuous selection nitrogen is as bottom blowing source of the gas.Regulation air supply intensity is 0.03m3/ (t min), carries out the botton blowing operation in this stage, this
The gassing time in stage is 1min.
7) tapping the stage, after loitering phase completes, fascinate backward with converter 55 degree as switching node, do not switch source of the gas kind
Class, continues to select nitrogen as bottom blowing source of the gas.Regulation air supply intensity is 0.025m3/ (t min), the bottom blowing carrying out this stage is made
Industry, the gassing time in this stage is 5min.
8) spatter the slag stage, after the tapping stage completes, reset to vertical state as switching node with converter, do not switch source of the gas kind
Class, continues to select nitrogen as bottom blowing source of the gas.Regulation air supply intensity is 0.10m3/ (t min), carries out spattering slag operation, this stage
Gassing time be 3min.Spattering after slag operation completes, converter enters next round bottom blowing and controls process.
The present embodiment can blow in deslagging stage and point as required follow-up blowing was set between the stage, the work of follow-up blowing
Skill condition is identical with the process conditions of blowing.
Embodiment 2
The present embodiment, for specially offered ER class steel, endpoint carbon content ＜ 0.10%, is designated as Mode B.
Each stage of control process particularly as follows:
1) the iron making stage, selecting nitrogen is 0.05m as bottom blowing source of the gas, regulation air supply intensity3/ (t min), control into
The botton blowing operation in this stage of row, the gassing time in this stage is 5min；This stage normally starts from after spattering the slag stage, specifically
After starting from spattering slag stopping bottom blowing.
2) the blowing stage, after the iron making stage completes, with oxygen supply by lance as switching node.The blowing stage of the present embodiment comprises
3 sub-control processes, the first subprocess regulation air supply intensity is 0.07m3/ (t min), does not switch source of the gas kind, continues to select
Nitrogen is as bottom blowing source of the gas；Second subprocess regulation air supply intensity is 0.05m3/ (t min), switches source of the gas kind, selects argon
Gas is as bottom blowing source of the gas；3rd subprocess regulation air supply intensity is 0.07m3/ (t min), does not switch source of the gas kind, continues choosing
Select argon as bottom blowing source of the gas；Sub-control process divides with the time for node, and the gassing time between subprocess is 5min
And 6min, carry out the botton blowing operation in this stage successively.
3) the deslagging stage, after the blowing stage completes, play rifle as switching node with oxygen rifle, do not switch source of the gas kind, continue choosing
Select argon as bottom blowing source of the gas.Regulation air supply intensity is 0.03m3/ (t min), carries out the botton blowing operation in this stage, this stage
Gassing time be 3min.
4) blow the stage, after the deslagging stage completes, with oxygen rifle secondary oxygen supply as switching node, do not switch source of the gas kind, continue
Continuous selection argon is as bottom blowing source of the gas.Regulation air supply intensity is 0.07m3/ (t min), carries out the botton blowing operation in this stage, this
The gassing time in stage is 1min.
5) thermometric sample phase, point is after the stage of blowing completes, and to start sublance as switching node, does not switch source of the gas kind, continues
Continuous selection argon is as bottom blowing source of the gas.Regulation air supply intensity is 0.03m3/ (t min), carries out the botton blowing operation in this stage, this
The gassing time in stage is 3min.
6) loitering phase, after thermometric sample phase completes, plays rifle as switching node with sublance, does not switch source of the gas kind, continue
Continuous selection argon is as bottom blowing source of the gas.Regulation air supply intensity is 0.03m3/ (t min), carries out the botton blowing operation in this stage, this
The gassing time in stage is 1min.
7) tapping the stage, after loitering phase completes, fascinate backward with converter 55 degree as switching node, do not switch source of the gas kind
Class, continues to select argon as bottom blowing source of the gas.Regulation air supply intensity is 0.025m3/ (t min), the bottom blowing carrying out this stage is made
Industry, the gassing time in this stage is 5min.
8) spatter the slag stage, after the tapping stage completes, reset to vertical state as switching node with converter, switch source of the gas kind
Class, selects nitrogen as bottom blowing source of the gas.Regulation air supply intensity is 0.10m3/ (t min), carries out spattering slag operation, blowing of this stage
The gas time is 3min.Spattering after slag operation completes, converter enters next round bottom blowing and controls process.
The present embodiment can blow in deslagging stage and point as required follow-up blowing was set between the stage, the work of follow-up blowing
Skill condition is identical with the process conditions of blowing.
It is noted that in operation in the operation of switching source of the gas kind, during gas conversion, it is desirable to subsequent gases valve opening 3
After Miao, could be closed by converted gas valve.
Embodiment 3
The present embodiment, for high-end low carbons steel, endpoint carbon content ＜ 0.10%, is designated as pattern C.
Each stage of control process particularly as follows:
1) the iron making stage, selecting nitrogen is 0.05m as bottom blowing source of the gas, regulation air supply intensity3/ (t min), control into
The botton blowing operation in this stage of row, the gassing time in this stage is 5min；This stage normally starts from after spattering the slag stage, specifically
After starting from spattering slag stopping bottom blowing.
2) the blowing stage, after the iron making stage completes, with oxygen supply by lance as switching node.The blowing stage of the present embodiment comprises
4 sub-control processes, the first subprocess regulation air supply intensity is 0.07m3/ (t min), does not switch source of the gas kind, continues to select
Nitrogen is as bottom blowing source of the gas；Second subprocess regulation air supply intensity is 0.05m3/ (t min), switches source of the gas kind, selects argon
Gas is as bottom blowing source of the gas；3rd subprocess regulation air supply intensity is 0.05m3/ (t min), does not switch source of the gas kind, continues choosing
Select argon as bottom blowing source of the gas；4th subprocess regulation air supply intensity is 0.07m3/ (t min), does not switch source of the gas kind, continues
Continuous selection argon is as bottom blowing source of the gas；Sub-control process divides with the time for node, the gassing time between subprocess
3min, 2min and 6min, carry out the botton blowing operation in this stage successively.
3) the deslagging stage, after the blowing stage completes, play rifle as switching node with oxygen rifle, do not switch source of the gas kind, continue choosing
Select argon as bottom blowing source of the gas.Regulation air supply intensity is 0.03m3/ (t min), carries out the botton blowing operation in this stage, this stage
Gassing time be 3min.
4) blow the stage, after the deslagging stage completes, with oxygen rifle secondary oxygen supply as switching node, do not switch source of the gas kind, continue
Continuous selection argon is as bottom blowing source of the gas.Regulation air supply intensity is 0.07m3/ (t min), carries out the botton blowing operation in this stage, this
The gassing time in stage is 1min.
5) thermometric sample phase, point is after the stage of blowing completes, and to start sublance as switching node, does not switch source of the gas kind, continues
Continuous selection argon is as bottom blowing source of the gas.Regulation air supply intensity is 0.03m3/ (t min), carries out the botton blowing operation in this stage, this
The gassing time in stage is 3min.
6) loitering phase, after thermometric sample phase completes, plays rifle as switching node with sublance, does not switch source of the gas kind, continue
Continuous selection argon is as bottom blowing source of the gas.Regulation air supply intensity is 0.03m3/ (t min), carries out the botton blowing operation in this stage, this
The gassing time in stage is 1min.
7) tapping the stage, after loitering phase completes, fascinate backward with converter 55 degree as switching node, do not switch source of the gas kind
Class, continues to select argon as bottom blowing source of the gas.Regulation air supply intensity is 0.025m3/ (t min), the bottom blowing carrying out this stage is made
Industry, the gassing time in this stage is 5min.
8) spatter the slag stage, after the tapping stage completes, reset to vertical state as switching node with converter, switch source of the gas kind
Class, selects nitrogen as bottom blowing source of the gas.Regulation air supply intensity is 0.10m3/ (t min), carries out spattering slag operation, blowing of this stage
The gas time is 3min.Spattering after slag operation completes, converter enters next round bottom blowing and controls process.
The present embodiment can blow in deslagging stage and point as required thermometric sample phase was set between the stage, select argon
As bottom blowing source of the gas.The gassing time in this stage is 3min.
It is noted that in operation in the operation of switching source of the gas kind, during gas conversion, it is desirable to subsequent gases valve opening 3
After Miao, could be closed by converted gas valve.
Embodiment 4
The present embodiment, for a number steel, rigid line class steel, endpoint carbon content ＞ 0.20%, is designated as pattern D.
Each stage of control process particularly as follows:
1) the iron making stage, selecting nitrogen is 0.05m as bottom blowing source of the gas, regulation air supply intensity3/ (t min), control into
The botton blowing operation in this stage of row, the gassing time in this stage is 5min；This stage normally starts from after spattering the slag stage, specifically
After starting from spattering slag stopping bottom blowing.
2) the blowing stage, after the iron making stage completes, with oxygen supply by lance as switching node.The blowing stage of the present embodiment comprises
4 sub-control processes, the first subprocess regulation air supply intensity is 0.07m3/ (t min), does not switch source of the gas kind, continues to select
Nitrogen is as bottom blowing source of the gas；Second subprocess regulation air supply intensity is 0.05m3/ (t min), does not switch source of the gas kind, continues
Select nitrogen as bottom blowing source of the gas；3rd subprocess regulation air supply intensity is 0.05m3/ (t min), switches source of the gas kind, choosing
Select argon as bottom blowing source of the gas；4th subprocess regulation air supply intensity is 0.06m3/ (t min), does not switch source of the gas kind, continues
Continuous selection argon is as bottom blowing source of the gas；Sub-control process divides with the time for node, the gassing time between subprocess
5min, 4min and 2min, carry out the botton blowing operation in this stage successively.
3) the deslagging stage, after the blowing stage completes, play rifle as switching node with oxygen rifle, switch source of the gas kind, select nitrogen
As bottom blowing source of the gas.Regulation air supply intensity is 0.025m3/ (t min), carries out the botton blowing operation in this stage, the air blowing in this stage
Time is 3min.
4) blow the stage, after the deslagging stage completes, with oxygen rifle secondary oxygen supply as switching node, switch source of the gas kind, select
Argon is as bottom blowing source of the gas.Regulation air supply intensity is 0.07m3/ (t min), carries out the botton blowing operation in this stage, this stage
Gassing time is 1min.
5) thermometric sample phase, point is after the stage of blowing completes, and to start sublance as switching node, does not switch source of the gas kind, continues
Continuous selection argon is as bottom blowing source of the gas.Regulation air supply intensity is 0.03m3/ (t min), carries out the botton blowing operation in this stage, this
The gassing time in stage is 3min.
6) loitering phase, after thermometric sample phase completes, plays rifle as switching node with sublance, does not switch source of the gas kind, continue
Continuous selection argon is as bottom blowing source of the gas.Regulation air supply intensity is 0.03m3/ (t min), carries out the botton blowing operation in this stage, this
The gassing time in stage is 1min.
7) tapping the stage, after loitering phase completes, fascinate backward with converter 55 degree as switching node, do not switch source of the gas kind
Class, continues to select argon as bottom blowing source of the gas.Regulation air supply intensity is 0.025m3/ (t min), the bottom blowing carrying out this stage is made
Industry, the gassing time in this stage is 5min.
8) spatter the slag stage, after the tapping stage completes, reset to vertical state as switching node with converter, switch source of the gas kind
Class, selects nitrogen as bottom blowing source of the gas.Regulation air supply intensity is 0.10m3/ (t min), carries out spattering slag operation, blowing of this stage
The gas time is 3min.Spattering after slag operation completes, converter enters next round bottom blowing and controls process.
The present embodiment can blow in deslagging stage and point as required thermometric sample phase was set between the stage, select argon
As bottom blowing source of the gas.The gassing time in this stage is 3min.
It is noted that in operation in the operation of switching source of the gas kind, during gas conversion, it is desirable to subsequent gases valve opening 3
After Miao, could be closed by converted gas valve.
Embodiment 5
The present embodiment, for DA class, 82B class, cold-forging steel class steel, terminal 0.10%≤carbon content≤0.20%, is designated as mould
Formula E.
Each stage of control process particularly as follows:
1) the iron making stage, selecting nitrogen is 0.05m as bottom blowing source of the gas, regulation air supply intensity3/ (t min), control into
The botton blowing operation in this stage of row, the gassing time in this stage is 5min；This stage normally starts from after spattering the slag stage, specifically
After starting from spattering slag stopping bottom blowing.
2) the blowing stage, after the iron making stage completes, with oxygen supply by lance as switching node.The blowing stage of the present embodiment comprises
4 sub-control processes, the first subprocess regulation air supply intensity is 0.07m3/ (t min), does not switch source of the gas kind, continues to select
Nitrogen is as bottom blowing source of the gas；Second subprocess regulation air supply intensity is 0.05m3/ (t min), does not switch source of the gas kind, continues
Select nitrogen as bottom blowing source of the gas；3rd subprocess regulation air supply intensity is 0.05m3/ (t min), switches source of the gas kind, choosing
Select argon as bottom blowing source of the gas；4th subprocess regulation air supply intensity is 0.06m3/ (t min), does not switch source of the gas kind, continues
Continuous selection argon is as bottom blowing source of the gas；Sub-control process divides with the time for node, the gassing time between subprocess
5min, 4min and 2min, carry out the botton blowing operation in this stage successively.
3) the deslagging stage, after the blowing stage completes, play rifle as switching node with oxygen rifle, switch source of the gas kind, select nitrogen
As bottom blowing source of the gas.Regulation air supply intensity is 0.025m3/ (t min), carries out the botton blowing operation in this stage, the air blowing in this stage
Time is 3min.
4) blow the stage, after the deslagging stage completes, with oxygen rifle secondary oxygen supply as switching node, switch source of the gas kind, select
Argon is as bottom blowing source of the gas.Regulation air supply intensity is 0.07m3/ (t min), carries out the botton blowing operation in this stage, this stage
Gassing time is 1min.
5) thermometric sample phase, point is after the stage of blowing completes, and to start sublance as switching node, does not switch source of the gas kind, continues
Continuous selection argon is as bottom blowing source of the gas.Regulation air supply intensity is 0.03m3/ (t min), carries out the botton blowing operation in this stage, this
The gassing time in stage is 3min.
6) loitering phase, after thermometric sample phase completes, plays rifle as switching node with sublance, does not switch source of the gas kind, continue
Continuous selection argon is as bottom blowing source of the gas.Regulation air supply intensity is 0.03m3/ (t min), carries out the botton blowing operation in this stage, this
The gassing time in stage is 1min.
7) tapping the stage, after loitering phase completes, fascinate backward with converter 55 degree as switching node, do not switch source of the gas kind
Class, continues to select argon as bottom blowing source of the gas.Regulation air supply intensity is 0.025m3/ (t min), the bottom blowing carrying out this stage is made
Industry, the gassing time in this stage is 5min.
8) spatter the slag stage, after the tapping stage completes, reset to vertical state as switching node with converter, switch source of the gas kind
Class, selects nitrogen as bottom blowing source of the gas.Regulation air supply intensity is 0.10m3/ (t min), carries out spattering slag operation, blowing of this stage
The gas time is 3min.Spattering after slag operation completes, converter enters next round bottom blowing and controls process.
The present embodiment can blow in deslagging stage and point as required thermometric sample phase was set between the stage, select argon
As bottom blowing source of the gas.The gassing time in this stage is 3min.
It is noted that in operation in the operation of switching source of the gas kind, during gas conversion, it is desirable to subsequent gases valve opening 3
After Miao, could be closed by converted gas valve.
Embodiment 6
The present embodiment for cord class, bearing class, special cold-forging steel class steel, terminal 0.10%≤carbon content≤
0.20%, it is designated as model F.
Each stage of control process particularly as follows:
1) the iron making stage, selecting nitrogen is 0.05m as bottom blowing source of the gas, regulation air supply intensity3/ (t min), control into
The botton blowing operation in this stage of row, the gassing time in this stage is 5min；This stage normally starts from after spattering the slag stage, specifically
After starting from spattering slag stopping bottom blowing.
2) the blowing stage, after the iron making stage completes, with oxygen supply by lance as switching node.The blowing stage of the present embodiment comprises
4 sub-control processes, the first subprocess regulation air supply intensity is 0.07m3/ (t min), does not switch source of the gas kind, continues to select
Nitrogen is as bottom blowing source of the gas；Second subprocess regulation air supply intensity is 0.05m3/ (t min), switches source of the gas kind, selects argon
Gas is as bottom blowing source of the gas；3rd subprocess regulation air supply intensity is 0.05m3/ (t min), does not switch source of the gas kind, continues choosing
Select argon as bottom blowing source of the gas；4th subprocess regulation air supply intensity is 0.06m3/ (t min), does not switch source of the gas kind, continues
Continuous selection argon is as bottom blowing source of the gas；Sub-control process divides with the time for node, the gassing time between subprocess
3min, 2min and 6min, carry out the botton blowing operation in this stage successively.
3) the deslagging stage, after the blowing stage completes, play rifle as switching node with oxygen rifle, switch source of the gas kind, select nitrogen
As bottom blowing source of the gas.Regulation air supply intensity is 0.025m3/ (t min), carries out the botton blowing operation in this stage, the air blowing in this stage
Time is 3min.
4) blow the stage, after the deslagging stage completes, with oxygen rifle secondary oxygen supply as switching node, switch source of the gas kind, select
Argon is as bottom blowing source of the gas.Regulation air supply intensity is 0.07m3/ (t min), carries out the botton blowing operation in this stage, this stage
Gassing time is 1min.
5) thermometric sample phase, point is after the stage of blowing completes, and to start sublance as switching node, does not switch source of the gas kind, continues
Continuous selection argon is as bottom blowing source of the gas.Regulation air supply intensity is 0.03m3/ (t min), carries out the botton blowing operation in this stage, this
The gassing time in stage is 3min.
6) loitering phase, after thermometric sample phase completes, plays rifle as switching node with sublance, does not switch source of the gas kind, continue
Continuous selection argon is as bottom blowing source of the gas.Regulation air supply intensity is 0.03m3/ (t min), carries out the botton blowing operation in this stage, this
The gassing time in stage is 1min.
7) tapping the stage, after loitering phase completes, fascinate backward with converter 55 degree as switching node, do not switch source of the gas kind
Class, continues to select argon as bottom blowing source of the gas.Regulation air supply intensity is 0.025m3/ (t min), the bottom blowing carrying out this stage is made
Industry, the gassing time in this stage is 5min.
8) spatter the slag stage, after the tapping stage completes, reset to vertical state as switching node with converter, switch source of the gas kind
Class, selects nitrogen as bottom blowing source of the gas.Regulation air supply intensity is 0.10m3/ (t min), carries out spattering slag operation, blowing of this stage
The gas time is 3min.Spattering after slag operation completes, converter enters next round bottom blowing and controls process.
The present embodiment can blow in deslagging stage and point as required thermometric sample phase was set between the stage, select argon
As bottom blowing source of the gas.The gassing time in this stage is 3min.
It is noted that in operation in the operation of switching source of the gas kind, during gas conversion, it is desirable to subsequent gases valve opening 3
After Miao, could be closed by converted gas valve.
Above-mentioned six kinds of patterns cover common ER class steel, specially offered ER class steel, high-end low carbons steel, number steel, rigid line
Class steel, DA class, 82B class, cold-forging steel class steel, cord class, bearing class, special cold-forging steel class steel etc., by above-mentioned A-F six kinds
Pattern carries out Automated condtrol by control methods such as PLC, only need to select corresponding pattern when operation, and need not specifically arrange
Parameter, drastically increases working performance and degree of accuracy.Achieve the technique effect of excellence.
Claims (8)
1. the bottom blowing mode control method of a combined blown converter, it is characterised in that: described control method is in combined blown converter
Iron making stage, blowing stage, deslagging stage, point blow stage, thermometric sample phase, loitering phase, tapping stage and spatter slag rank
The botton blowing operation of section is controlled, for different steel types and endpoint carbon content scope, to the end in each stage botton blowing operation
Air blowing source category, air supply intensity, gassing time are adjusted, and obtain corresponding bottom blowing pattern, and operate interface in control system
On the control knob of corresponding different bottom blowing pattern is set, select bottom blowing pattern by clicking on control knob.
The bottom blowing mode control method of a kind of combined blown converter the most according to claim 1, it is characterised in that: described Bottom Blowing
Source is nitrogen or argon, and the quantity of bottom blowing gun is 3～6.
The bottom blowing mode control method of a kind of combined blown converter the most according to claim 2, it is characterised in that: described bottom blowing supplies
Gas intensity is 0.02m3/ (t min)～0.10m3/(t·min)。
The bottom blowing mode control method of a kind of combined blown converter the most according to claim 1, it is characterised in that: described aim carbon
Content range is divided into carbon content ＜ 0.10%, 0.10%≤carbon content≤0.20%, 0.20% 3 scope of carbon content ＞.
5. according to the bottom blowing mode control method of a kind of combined blown converter described in any one of Claims 1 to 4, it is characterised in that:
Described control method for concrete control in stage each in combined blown converter is,
1) the iron making stage, select Bottom Blowing source category, regulate air supply intensity, carry out the end in this stage according to the gassing time set
Blow operation；
2) the blowing stage, after the iron making stage completes, with oxygen supply by lance as switching node, Bottom Blowing source category, regulation supply are selected
Intensity, carries out the botton blowing operation in this stage according to the gassing time set；
3) the deslagging stage, after the blowing stage completes, play rifle as switching node with oxygen rifle, select Bottom Blowing source category, regulation supply
Intensity, carries out the botton blowing operation in this stage according to the gassing time set；
4) blow the stage, after the deslagging stage completes, with oxygen rifle secondary oxygen supply as switching node, select Bottom Blowing source category, regulation
Air supply intensity, carries out the botton blowing operation in this stage according to the gassing time set；
5) thermometric sample phase, point is after the stage of blowing completes, and to start sublance as switching node, selects Bottom Blowing source category, regulation
Air supply intensity, carries out the botton blowing operation in this stage according to the gassing time set；
6) loitering phase, after thermometric sample phase completes, plays rifle as switching node with sublance, selects Bottom Blowing source category, regulation
Air supply intensity, carries out the botton blowing operation in this stage according to the gassing time set；
7) tapping the stage, after loitering phase completes, fascinate backward with converter 55 degree as switching node, select Bottom Blowing source category,
Regulation air supply intensity, carries out the botton blowing operation in this stage according to the gassing time set；
8) spatter the slag stage, after the tapping stage completes, reset to vertical state as switching node with converter, select bottom blowing source of the gas kind
Class, regulates air supply intensity, carries out spattering slag operation, spatters after slag operation completes, and converter enters next round bottom blowing and controls process.
The bottom blowing mode control method of a kind of combined blown converter the most according to claim 5, it is characterised in that: described step 2)
The blowing stage comprise some height control process, described sub-control process divides with gassing time for node and controls.
The bottom blowing mode control method of a kind of combined blown converter the most according to claim 5, it is characterised in that: described deslagging rank
Section and point blow and arrange follow-up blowing and/or thermometric sample phase between the stage, the process conditions of described follow-up blowing and blowing
Process conditions are identical.
The bottom blowing mode control method of a kind of combined blown converter the most according to claim 5, it is characterised in that: described controlling party
Method stirs button after stirring operator scheme after also including and arranging correspondence on operation interface, described after stir the air supply intensity of operation and be
0.09m3/ (t min), described after stir operation setting and blow latter stage in stage at point.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20190218631A1 (en) * | 2018-01-17 | 2019-07-18 | Air Products And Chemicals, Inc. | Bottom stirring tuyere and method for a basic oxygen furnace |
| CN111041150A (en) * | 2018-10-12 | 2020-04-21 | 上海梅山钢铁股份有限公司 | Control method for automatic slag splashing of converter |
| CN112725557A (en) * | 2020-12-25 | 2021-04-30 | 济南工程职业技术学院 | Converter bottom blowing intelligent control method |
| CN112853033A (en) * | 2021-03-10 | 2021-05-28 | 柳州钢铁股份有限公司 | Efficient slag splashing intelligent control method and system based on furnace mouth image analysis |
| CN113005254A (en) * | 2021-02-23 | 2021-06-22 | 山东钢铁股份有限公司 | Unmanned intelligent steelmaking system and steelmaking method |
| CN113462845A (en) * | 2021-05-27 | 2021-10-01 | 石钢京诚装备技术有限公司 | Method for controlling converter bottom height by adjusting bottom blowing parameters |
| CN114107609A (en) * | 2021-11-24 | 2022-03-01 | 江苏沙钢集团有限公司 | Gas injection process model for ladle refining |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1924027A (en) * | 2006-09-26 | 2007-03-07 | 山西太钢不锈钢股份有限公司 | Switching method for feeding nitrogen and argon of reblowing converter bottom |
| CN102230052A (en) * | 2011-07-19 | 2011-11-02 | 莱芜钢铁股份有限公司 | Top-bottom combined blowing converter technology for high-carbon low-phosphor molten steel with single-slag process |
| CN104232834A (en) * | 2014-08-29 | 2014-12-24 | 武汉钢铁(集团)公司 | Mode-based converter steelmaking automatic control device and application method of automatic control device |
-
2016
- 2016-08-26 CN CN201610741393.0A patent/CN106167844B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1924027A (en) * | 2006-09-26 | 2007-03-07 | 山西太钢不锈钢股份有限公司 | Switching method for feeding nitrogen and argon of reblowing converter bottom |
| CN102230052A (en) * | 2011-07-19 | 2011-11-02 | 莱芜钢铁股份有限公司 | Top-bottom combined blowing converter technology for high-carbon low-phosphor molten steel with single-slag process |
| CN104232834A (en) * | 2014-08-29 | 2014-12-24 | 武汉钢铁(集团)公司 | Mode-based converter steelmaking automatic control device and application method of automatic control device |
Non-Patent Citations (3)
| Title |
|---|
| "《钢铁生产控制及管理系统》" * |
| 蒋慎言 等: "《炼钢生产自动化技术》", 30 November 2006 * |
| 钟良才 等: "《冶金过程控制基础及应用》", 30 September 2011 * |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20190218631A1 (en) * | 2018-01-17 | 2019-07-18 | Air Products And Chemicals, Inc. | Bottom stirring tuyere and method for a basic oxygen furnace |
| US10781499B2 (en) * | 2018-01-17 | 2020-09-22 | Air Products And Chemicals, Inc. | Bottom stirring tuyere and method for a basic oxygen furnace |
| CN111041150A (en) * | 2018-10-12 | 2020-04-21 | 上海梅山钢铁股份有限公司 | Control method for automatic slag splashing of converter |
| CN112725557A (en) * | 2020-12-25 | 2021-04-30 | 济南工程职业技术学院 | Converter bottom blowing intelligent control method |
| CN113005254A (en) * | 2021-02-23 | 2021-06-22 | 山东钢铁股份有限公司 | Unmanned intelligent steelmaking system and steelmaking method |
| CN112853033A (en) * | 2021-03-10 | 2021-05-28 | 柳州钢铁股份有限公司 | Efficient slag splashing intelligent control method and system based on furnace mouth image analysis |
| CN112853033B (en) * | 2021-03-10 | 2023-10-13 | 柳州钢铁股份有限公司 | Efficient slag splashing intelligent control method and system based on furnace mouth image analysis |
| CN113462845A (en) * | 2021-05-27 | 2021-10-01 | 石钢京诚装备技术有限公司 | Method for controlling converter bottom height by adjusting bottom blowing parameters |
| CN114107609A (en) * | 2021-11-24 | 2022-03-01 | 江苏沙钢集团有限公司 | Gas injection process model for ladle refining |
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