CN109735686A - A kind of the top gun oxygen blast structure and its control method of novel evacuated purifier - Google Patents
A kind of the top gun oxygen blast structure and its control method of novel evacuated purifier Download PDFInfo
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- CN109735686A CN109735686A CN201910192382.5A CN201910192382A CN109735686A CN 109735686 A CN109735686 A CN 109735686A CN 201910192382 A CN201910192382 A CN 201910192382A CN 109735686 A CN109735686 A CN 109735686A
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- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 title claims abstract description 104
- 229910052760 oxygen Inorganic materials 0.000 title claims abstract description 104
- 239000001301 oxygen Substances 0.000 title claims abstract description 104
- 238000000034 method Methods 0.000 title claims abstract description 29
- 229910000831 Steel Inorganic materials 0.000 claims description 52
- 239000010959 steel Substances 0.000 claims description 52
- 238000002347 injection Methods 0.000 claims description 32
- 239000007924 injection Substances 0.000 claims description 32
- 230000001105 regulatory effect Effects 0.000 claims description 32
- 238000007670 refining Methods 0.000 claims description 27
- 239000007789 gas Substances 0.000 claims description 22
- 230000008569 process Effects 0.000 claims description 15
- 238000006213 oxygenation reaction Methods 0.000 claims description 10
- 241001125929 Trisopterus luscus Species 0.000 claims description 6
- 238000007664 blowing Methods 0.000 claims description 6
- 239000007788 liquid Substances 0.000 claims description 4
- 238000012545 processing Methods 0.000 claims description 4
- 230000005611 electricity Effects 0.000 claims 1
- 238000011084 recovery Methods 0.000 description 14
- 238000003723 Smelting Methods 0.000 description 9
- 238000009628 steelmaking Methods 0.000 description 6
- 230000008859 change Effects 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 229910052799 carbon Inorganic materials 0.000 description 4
- 230000006641 stabilisation Effects 0.000 description 4
- 238000011105 stabilization Methods 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 238000005261 decarburization Methods 0.000 description 3
- 210000000867 larynx Anatomy 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000036284 oxygen consumption Effects 0.000 description 2
- 206010021143 Hypoxia Diseases 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 208000018875 hypoxemia Diseases 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 238000007634 remodeling Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Abstract
The invention discloses a kind of top gun oxygen blast structure of novel evacuated purifier and its control methods, component is adjusted including vacuum degree, top gun moving assembly, vacuum chamber and control unit, wherein vacuum degree adjusts component and control unit is set to outside vacuum chamber, wherein top gun moving assembly is set to internal vacuum chamber top, the vacuum degree adjusts component, top gun moving assembly is separately connected control unit, wherein vacuum degree adjusts component and vacuum chamber, the top gun moving assembly includes top gun and fixing bolt, wherein top gun one end is connect with fixing bolt, wherein fixing bolt is rotatably fixed on vacuum chamber top, the top gun outer wall is equipped with screw thread, wherein the screw thread of top gun outer wall can be such that top gun moves up and down with the screw-internal thread fit of fixing bolt, the fixing bolt connects servo motor, wherein servo motor connects control unit.
Description
Technical field
The invention belongs to molten steel furnace outer refining technology field more particularly to a kind of top gun oxygen blast of novel evacuated purifier
Structure and its control method.
Background technique
According to steel grade and the needs of metallurgical technology, the outer equipment for vacuum refining of furnace often configures more function with oxygen decarburization function
Energy top gun, but multifunctional top-gun is generally fixed to certain position, can not move, oxygen blown purpose is molten steel decarburization,
Cardinal principle is as follows:
C+O=CO；CO+O=CO2
CO, CO2 gas that reaction between carbon and oxygen generates are precipitated from molten steel, and molten steel is finally discharged, to reach the carbon content reduced in molten steel,
Such mode is mainly used for the smelting of low-carbon or Ultra-low carbon kind steel grade.
It is analyzed from the data of the oxygen decarburization of domestic main steel mill external refining RH application of vacuum, it is oxygen blown at present to receive
Rate is not high, and substantially 40 ~ 60%, recovery rate refers to the percentage of the free oxygen amount and blowing oxygen quantity of fusing into molten steel, oxygen blast recovery rate
The waste of more hypoxemia is bigger, causes smelting cost to increase indirectly.How oxygen blown recovery rate is improved, and that improves oxygen utilizes effect
Rate, optimizes smelting process, and control smelting cost is the project for needing to solve.
Summary of the invention
It is an object of the invention to overcome above-mentioned the deficiencies in the prior art, a kind of top gun of novel evacuated purifier is provided
Oxygen blast structure and its control method, overcome in the prior art 1: top gun is generally fixed to certain position, can not move；2: blowing
The recovery rate of oxygen is not high；3: the problems such as smelting cost increases.
In order to solve technical problem, the technical scheme is that a kind of top gun oxygen blast knot of novel evacuated purifier
Structure, including vacuum degree adjust component, top gun moving assembly, vacuum chamber and control unit, and wherein vacuum degree adjusts component and control
Unit is set to outside vacuum chamber, and wherein top gun moving assembly is set to internal vacuum chamber top, the vacuum degree adjust component,
Top gun moving assembly is separately connected control unit, and wherein vacuum degree adjusts component and vacuum chamber, the top gun moving assembly
Including top gun and fixing bolt, wherein top gun one end is connect with fixing bolt, and wherein fixing bolt is rotatably fixed on vacuum chamber
Top, the top gun outer wall are equipped with screw thread, and wherein the screw thread of top gun outer wall can make in top gun with the screw-internal thread fit of fixing bolt
Lower movement, the fixing bolt connect servo motor, and wherein servo motor connects control unit.
Preferably, it includes vacuum degree regulating valve, vacuum degree stop valve, vacuum degree adjusting pipeline that the vacuum degree, which adjusts component,
With the first booster pump, wherein vacuum degree adjusts the exhaust pipe of pipeline one end connection equipment for vacuum refining, wherein vacuum refining
The gas outlet of the exhaust pipe connection vacuum chamber of device, the vacuum degree adjust the pipeline other end and connect vacuum degree stop valve,
The vacuum degree stop valve other end connects vacuum degree regulating valve, and wherein the vacuum degree regulating valve other end connects the first booster pump,
The air inlet of the other end connection vacuum chamber of first booster pump, the vacuum degree regulating valve, vacuum degree stop valve and first
Booster pump is separately connected control unit.
Preferably, first booster pump also connects the second booster pump by pipeline, wherein the second booster pump can be from atmosphere
It is introduced directly into air, second booster pump connects control unit.
Preferably, the top gun lower end is equipped with aditus laryngis, and wherein aditus laryngis inner top side is equipped with first pressure sensor, wherein larynx
Mouth inside lower end is equipped with second pressure sensor, and lower end is equipped with height sensor, the first pressure sensing on the outside of the aditus laryngis
Device, second pressure sensor and height sensor are separately connected control unit.
Preferably, described control unit is calculated by the following formula the oxygen injection rate of distance and top gun of the top gun away from molten steel:
In above formula:
V: the oxygen injection rate of top gun；
N: constant；
D: top gun throat diameter；
Pin: aditus laryngis inlet pressure；
Pout: the indoor vacuum degree of aditus laryngis outlet pressure, as vacuum；
K: constant；
Ma: aditus laryngis exit Mach number；
Ho: distance of the top gun away from molten steel；
: pit depth.
Preferably, a kind of top gun oxygen blast control method of novel evacuated purifier as described above, comprising the following steps:
Step 1) enters the vacuum processing stage when molten steel, needs oxygenation amount to control unit input, control unit calculate blowing oxygen quantity,
The oxygen injection rate of top gun, top gun throat diameter, aditus laryngis inlet pressure, aditus laryngis outlet pressure, aditus laryngis exit Mach number, top gun are away from steel
The distance and pit depth of liquid；
Vacuum degree is adjusted the exhaust pipe of pipeline one end connection equipment for vacuum refining by step 2, and other end connection vacuum degree is cut
Disconnected valve, then control unit control vacuum degree stop valve is opened, using vacuum degree regulating valve according to the vacuum values of setting into
Row automatic adjustment inputs exhaust gas in vacuum chamber followed by after the pressurization of the first booster pump, to reach pressure balance；
Top gun is moved to distance of the top gun away from molten steel of calculating by step 3) control unit control top gun moving assembly, utilizes first
Pressure sensor detects aditus laryngis inlet pressure, detects aditus laryngis outlet pressure using second pressure sensor, utilizes height sensor
Distance of the top gun away from molten steel is detected, top, which takes a position, to be set rear aditus laryngis oxygen blast and start；
Step 4) reaches when needing oxygenation amount of setting when oxygen blast, and oxygen blast terminates, and control unit controls top gun moving assembly for top gun
Upper limit position is risen to, oxygen blast process is completed.
Preferably, the first booster pump in the step 2 also connects the second booster pump by pipeline, is used for vacuum degree tune
The gas of section can be introduced directly into from atmosphere.
Preferably, the vacuum values set in the step 2 is 80 ~ 120mbar.
Compared with the existing technology, the present invention has the advantages that
(1) present invention is that the oxygen injection rate of top gun and top gun are reached optimal oxygen blast recovery rate away from combining at a distance from molten steel,
Improve smelting process efficiency, save steel-making cost, oxygen blast recovery rate height can reduce oxygen consumption, saved refining steel-making at
This, can adjust the process matching relationship between steel making working procedure, optimize smelting process process, improve efficiency；
(2) control unit of the present invention calculates the oxygen injection rate of distance and top gun of the top gun away from molten steel by formula, in top gun
In the case that throat diameter determines, distance of the top gun away from molten steel is associated with the oxygen injection rate Auto-matching of top gun, oxygen blast recovery rate
It can achieve 68 ~ 80%, be the highest recovery rate of known public data；
(3) vacuum degree of the present invention adjusts the stabilization that component effectively controls vacuum degree in vacuum chamber, such aditus laryngis outlet pressure
For definite value, calculating can be made to be simplified, data are more reliable, effective, effectively increase oxygen blast recovery rate；
(4) top gun moving assembly of the present invention can be such that top gun quickly moves up and down, and reach distance of the top gun away from molten steel of requirement, and
Structure is simple, easy to operate.
Detailed description of the invention
Fig. 1, structural schematic diagram of the invention；
Fig. 2, vacuum degree of the present invention adjust the structural schematic diagram of component.
Description of symbols:
1- vacuum chamber, 2- top gun, 3- fixing bolt, 4- vacuum degree regulating valve, 5- vacuum degree stop valve, 6- vacuum degree regulation pipe
Road, the first booster pump of 7-, the second booster pump of 8-, 9- aditus laryngis, 10- first pressure sensor, 11- second pressure sensor, 12- high
Spend sensor.
Specific embodiment
The specific embodiment of the invention is described below with reference to embodiment:
It should be noted that structure, ratio, size etc. that this specification is illustrated, only to cooperate specification revealed
Content is not intended to limit the invention enforceable qualifications, Ren Hejie so that those skilled in the art understands and reads
The modification of structure, the change of proportionate relationship or the adjustment of size are not influencing the effect of present invention can be generated and can reach
Under purpose, should all still it fall in the range of disclosed technology contents can cover.
Meanwhile cited such as "upper" in this specification, "lower", "left", "right", " centre " and " one " term, also
Only being illustrated convenient for narration, rather than to limit the scope of the invention, relativeness is altered or modified, in nothing
Under essence change technology contents, when being also considered as the enforceable scope of the present invention.
The exhaust pipe of equipment for vacuum refining of the present invention is existing apparatus.
Embodiment 1
As shown in Figure 1 and 2, the invention discloses a kind of top gun oxygen blast structures of novel evacuated purifier, including vacuum degree to adjust
Component, top gun moving assembly, vacuum chamber 1 and control unit, wherein vacuum degree adjusts component and control unit is set to vacuum chamber 1
Outside, wherein top gun moving assembly is set to 1 inner tip of vacuum chamber, and the vacuum degree adjusts component, top gun moving assembly point
Not Lian Jie control unit, wherein vacuum degree adjusts component and be connected to vacuum chamber 1, and the top gun moving assembly includes top gun 2 and consolidate
Determine bolt 3, wherein 2 one end of top gun is connect with fixing bolt 3, and wherein fixing bolt 3 is rotatably fixed on 1 top of vacuum chamber, institute
2 outer wall of top gun is stated equipped with screw thread, wherein the screw thread of 2 outer wall of top gun can make to move down in top gun 2 with the screw-internal thread fit of fixing bolt 3
Dynamic, the fixing bolt 3 connects servo motor, and wherein servo motor connects control unit.
Embodiment 2
As shown in Figure 1 and 2, the invention discloses a kind of top gun oxygen blast structures of novel evacuated purifier, including vacuum degree to adjust
Component, top gun moving assembly, vacuum chamber 1 and control unit, wherein vacuum degree adjusts component and control unit is set to vacuum chamber 1
Outside, wherein top gun moving assembly is set to 1 inner tip of vacuum chamber, and the vacuum degree adjusts component, top gun moving assembly point
Not Lian Jie control unit, wherein vacuum degree adjusts component and be connected to vacuum chamber 1, and the top gun moving assembly includes top gun 2 and consolidate
Determine bolt 3, wherein 2 one end of top gun is connect with fixing bolt 3, and wherein fixing bolt 3 is rotatably fixed on 1 top of vacuum chamber, institute
2 outer wall of top gun is stated equipped with screw thread, wherein the screw thread of 2 outer wall of top gun can make to move down in top gun 2 with the screw-internal thread fit of fixing bolt 3
Dynamic, the fixing bolt 3 connects servo motor, and wherein servo motor connects control unit.
As shown in Figure 2, it is preferred that the vacuum degree adjust component include vacuum degree regulating valve 4, it is vacuum degree stop valve 5, true
Reciprocal of duty cycle adjusts pipeline 6 and the first booster pump 7, and wherein vacuum degree adjusts the exhaust gas discharge of 6 one end of pipeline connection equipment for vacuum refining
Pipe, wherein the gas outlet of the exhaust pipe connection vacuum chamber 1 of equipment for vacuum refining, the vacuum degree adjust 6 other end of pipeline
Vacuum degree stop valve 5 is connected, 5 other end of vacuum degree stop valve connects vacuum degree regulating valve 4, wherein vacuum degree regulating valve 4
The other end connects the first booster pump 7, the air inlet of the other end connection vacuum chamber 1 of first booster pump 7, the vacuum degree tune
Section valve 4, vacuum degree stop valve 5 and the first booster pump 7 are separately connected control unit.
Embodiment 3
As shown in Figure 1 and 2, the invention discloses a kind of top gun oxygen blast structures of novel evacuated purifier, including vacuum degree to adjust
Component, top gun moving assembly, vacuum chamber 1 and control unit, wherein vacuum degree adjusts component and control unit is set to vacuum chamber 1
Outside, wherein top gun moving assembly is set to 1 inner tip of vacuum chamber, and the vacuum degree adjusts component, top gun moving assembly point
Not Lian Jie control unit, wherein vacuum degree adjusts component and be connected to vacuum chamber 1, and the top gun moving assembly includes top gun 2 and consolidate
Determine bolt 3, wherein 2 one end of top gun is connect with fixing bolt 3, and wherein fixing bolt 3 is rotatably fixed on 1 top of vacuum chamber, institute
2 outer wall of top gun is stated equipped with screw thread, wherein the screw thread of 2 outer wall of top gun can make to move down in top gun 2 with the screw-internal thread fit of fixing bolt 3
Dynamic, the fixing bolt 3 connects servo motor, and wherein servo motor connects control unit.
As shown in Figure 2, it is preferred that the vacuum degree adjust component include vacuum degree regulating valve 4, it is vacuum degree stop valve 5, true
Reciprocal of duty cycle adjusts pipeline 6 and the first booster pump 7, and wherein vacuum degree adjusts the exhaust gas discharge of 6 one end of pipeline connection equipment for vacuum refining
Pipe, wherein the gas outlet of the exhaust pipe connection vacuum chamber 1 of equipment for vacuum refining, the vacuum degree adjust 6 other end of pipeline
Vacuum degree stop valve 5 is connected, 5 other end of vacuum degree stop valve connects vacuum degree regulating valve 4, wherein vacuum degree regulating valve 4
The other end connects the first booster pump 7, the air inlet of the other end connection vacuum chamber 1 of first booster pump 7, the vacuum degree tune
Section valve 4, vacuum degree stop valve 5 and the first booster pump 7 are separately connected control unit.
As shown in Figure 2, it is preferred that first booster pump 7 also connects the second booster pump 8 by pipeline, wherein second increases
Press pump 8 can be introduced directly into air from atmosphere, and second booster pump 8 connects control unit.
Embodiment 4
As shown in Figure 1 and 2, the invention discloses a kind of top gun oxygen blast structures of novel evacuated purifier, including vacuum degree to adjust
Component, top gun moving assembly, vacuum chamber 1 and control unit, wherein vacuum degree adjusts component and control unit is set to vacuum chamber 1
Outside, wherein top gun moving assembly is set to 1 inner tip of vacuum chamber, and the vacuum degree adjusts component, top gun moving assembly point
Not Lian Jie control unit, wherein vacuum degree adjusts component and be connected to vacuum chamber 1, and the top gun moving assembly includes top gun 2 and consolidate
Determine bolt 3, wherein 2 one end of top gun is connect with fixing bolt 3, and wherein fixing bolt 3 is rotatably fixed on 1 top of vacuum chamber, institute
2 outer wall of top gun is stated equipped with screw thread, wherein the screw thread of 2 outer wall of top gun can make to move down in top gun 2 with the screw-internal thread fit of fixing bolt 3
Dynamic, the fixing bolt 3 connects servo motor, and wherein servo motor connects control unit.
As shown in Figure 2, it is preferred that the vacuum degree adjust component include vacuum degree regulating valve 4, it is vacuum degree stop valve 5, true
Reciprocal of duty cycle adjusts pipeline 6 and the first booster pump 7, and wherein vacuum degree adjusts the exhaust gas discharge of 6 one end of pipeline connection equipment for vacuum refining
Pipe, wherein the gas outlet of the exhaust pipe connection vacuum chamber 1 of equipment for vacuum refining, the vacuum degree adjust 6 other end of pipeline
Vacuum degree stop valve 5 is connected, 5 other end of vacuum degree stop valve connects vacuum degree regulating valve 4, wherein vacuum degree regulating valve 4
The other end connects the first booster pump 7, the air inlet of the other end connection vacuum chamber 1 of first booster pump 7, the vacuum degree tune
Section valve 4, vacuum degree stop valve 5 and the first booster pump 7 are separately connected control unit.
The vacuum chamber 1 can be to be multiple, and multiple vacuum chambers 1 can connect to improve vacuum degree.
As shown in Figure 2, it is preferred that first booster pump 7 also connects the second booster pump 8 by pipeline, wherein second increases
Press pump 8 can be introduced directly into air from atmosphere, and second booster pump 8 connects control unit.
As shown in Figure 2, it is preferred that 2 lower end of top gun is equipped with aditus laryngis 9, and wherein 9 inner top side of aditus laryngis is equipped with first pressure
Sensor 10, wherein 9 inside lower end of aditus laryngis is equipped with second pressure sensor 11, and the 9 outside lower end of aditus laryngis is equipped with highly sensing
Device 12, the first pressure sensor 10, second pressure sensor 11 and height sensor 12 are separately connected control unit.
Embodiment 5
As shown in Figure 1 and 2, the invention discloses a kind of top gun oxygen blast structures of novel evacuated purifier, including vacuum degree to adjust
Component, top gun moving assembly, vacuum chamber 1 and control unit, wherein vacuum degree adjusts component and control unit is set to vacuum chamber 1
Outside, wherein top gun moving assembly is set to 1 inner tip of vacuum chamber, and the vacuum degree adjusts component, top gun moving assembly point
Not Lian Jie control unit, wherein vacuum degree adjusts component and be connected to vacuum chamber 1, and the top gun moving assembly includes top gun 2 and consolidate
Determine bolt 3, wherein 2 one end of top gun is connect with fixing bolt 3, and wherein fixing bolt 3 is rotatably fixed on 1 top of vacuum chamber, institute
2 outer wall of top gun is stated equipped with screw thread, wherein the screw thread of 2 outer wall of top gun can make to move down in top gun 2 with the screw-internal thread fit of fixing bolt 3
Dynamic, the fixing bolt 3 connects servo motor, and wherein servo motor connects control unit.
As shown in Figure 2, it is preferred that the vacuum degree adjust component include vacuum degree regulating valve 4, it is vacuum degree stop valve 5, true
Reciprocal of duty cycle adjusts pipeline 6 and the first booster pump 7, and wherein vacuum degree adjusts the exhaust gas discharge of 6 one end of pipeline connection equipment for vacuum refining
Pipe, wherein the gas outlet of the exhaust pipe connection vacuum chamber 1 of equipment for vacuum refining, the vacuum degree adjust 6 other end of pipeline
Vacuum degree stop valve 5 is connected, 5 other end of vacuum degree stop valve connects vacuum degree regulating valve 4, wherein vacuum degree regulating valve 4
The other end connects the first booster pump 7, the air inlet of the other end connection vacuum chamber 1 of first booster pump 7, the vacuum degree tune
Section valve 4, vacuum degree stop valve 5 and the first booster pump 7 are separately connected control unit.
As shown in Figure 2, it is preferred that first booster pump 7 also connects the second booster pump 8 by pipeline, wherein second increases
Press pump 8 can be introduced directly into air from atmosphere, and second booster pump 8 connects control unit.
As shown in Figure 2, it is preferred that 2 lower end of top gun is equipped with aditus laryngis 9, and wherein 9 inner top side of aditus laryngis is equipped with first pressure
Sensor 10, wherein 9 inside lower end of aditus laryngis is equipped with second pressure sensor 11, and the 9 outside lower end of aditus laryngis is equipped with highly sensing
Device 12, the first pressure sensor 10, second pressure sensor 11 and height sensor 12 are separately connected control unit.
Preferably, described control unit is calculated by the following formula the oxygen injection rate of distance and top gun of the top gun away from molten steel:
In above formula:
V: the oxygen injection rate of top gun；
N: constant；
D: top gun throat diameter；
Pin: aditus laryngis inlet pressure；
Pout: the indoor vacuum degree of aditus laryngis outlet pressure, as vacuum；
K: constant；
Ma: aditus laryngis exit Mach number；
Ho: distance of the top gun away from molten steel；
: pit depth.
Embodiment 6
As shown in Figure 1 and 2, the invention discloses a kind of top gun oxygen blast structures of novel evacuated purifier, including vacuum degree to adjust
Component, top gun moving assembly, vacuum chamber 1 and control unit, wherein vacuum degree adjusts component, top gun moving assembly is separately connected control
Unit processed, the top gun moving assembly are set to 1 top of vacuum chamber, and wherein vacuum degree adjusts component and is connected to vacuum chamber 1, described
Top gun moving assembly includes top gun 2 and fixing bolt 3, and wherein 2 one end of top gun is connect with fixing bolt 3, and wherein fixing bolt 3 can
1 top of vacuum chamber is fixed in rotation, and 2 outer wall of top gun is equipped with screw thread, and wherein the screw thread of 2 outer wall of top gun can be with fixing bolt 3
Screw-internal thread fit move up and down top gun 2, the fixing bolt 3 connects servo motor, and wherein servo motor connection control is single
Member.
As shown in Figure 2, it is preferred that the vacuum degree adjust component include vacuum degree regulating valve 4, it is vacuum degree stop valve 5, true
Reciprocal of duty cycle adjusts pipeline 6 and the first booster pump 7, and wherein vacuum degree adjusts the exhaust gas discharge of 6 one end of pipeline connection equipment for vacuum refining
Pipe, vacuum degree adjust 6 other end of pipeline and connect vacuum degree stop valve 5, and 5 other end of vacuum degree stop valve connects vacuum degree tune
Valve 4 is saved, wherein 4 other end of vacuum degree regulating valve connects the first booster pump 7, and the other end of first booster pump 7 connects vacuum
Room 1, the vacuum degree regulating valve 4, vacuum degree stop valve 5 and the first booster pump 7 are separately connected control unit.
As shown in Figure 2, it is preferred that first booster pump 7 also connects the second booster pump 8 by pipeline, wherein second increases
Press pump 8 can be introduced directly into air from atmosphere, and second booster pump 8 connects control unit.
As shown in Figure 2, it is preferred that 2 lower end of top gun is equipped with aditus laryngis 9, and wherein 9 inner top side of aditus laryngis is equipped with first pressure
Sensor 10, wherein 9 inside lower end of aditus laryngis is equipped with second pressure sensor 11, and the 9 outside lower end of aditus laryngis is equipped with highly sensing
Device 12, the first pressure sensor 10, second pressure sensor 11 and height sensor 12 are separately connected control unit.
Preferably, described control unit is calculated by the following formula the oxygen injection rate of distance and top gun of the top gun away from molten steel:
In above formula:
V: the oxygen injection rate of top gun；
N: constant；
D: top gun throat diameter；
Pin: aditus laryngis inlet pressure；
Pout: the indoor vacuum degree of aditus laryngis outlet pressure, as vacuum；
K: constant；
Ma: aditus laryngis exit Mach number；
Ho: distance of the top gun away from molten steel；
: pit depth.
Preferably, a kind of top gun oxygen blast control method of novel evacuated purifier as described above, comprising the following steps:
Step 1) enters the vacuum processing stage when molten steel, needs oxygenation amount to control unit input, control unit calculate blowing oxygen quantity,
The oxygen injection rate of top gun, top gun throat diameter, aditus laryngis inlet pressure, aditus laryngis outlet pressure, aditus laryngis exit Mach number, top gun are away from steel
The distance and pit depth of liquid；
Vacuum degree is adjusted the exhaust pipe of 6 one end of pipeline connection equipment for vacuum refining by step 2, and the other end connects vacuum degree
Stop valve 5, then control unit control vacuum degree stop valve 5 is opened, using vacuum degree regulating valve 4 according to the vacuum degree of setting
Value automatically adjusts, and inputs exhaust gas in vacuum chamber followed by after the pressurization of the first booster pump 7, to reach pressure balance；
Top gun 2 is moved to distance of the top gun away from molten steel of calculating by step 3) control unit control top gun moving assembly, utilizes the
One pressure sensor 10 detects aditus laryngis inlet pressure, detects aditus laryngis outlet pressure using second pressure sensor 11, utilizes height
Sensor 12 detects distance of the top gun away from molten steel, and top, which robs 2 positions and sets rear 9 oxygen blast of aditus laryngis, to be started；
Step 4) reaches when needing oxygenation amount of setting when oxygen blast, and oxygen blast terminates, and control unit controls top gun moving assembly for top gun 2
Upper limit position is risen to, oxygen blast process is completed.
Embodiment 7
As shown in Figure 1 and 2, the invention discloses a kind of top gun oxygen blast structures of novel evacuated purifier, including vacuum degree to adjust
Component, top gun moving assembly, vacuum chamber 1 and control unit, wherein vacuum degree adjusts component, top gun moving assembly is separately connected control
Unit processed, the top gun moving assembly are set to 1 top of vacuum chamber, and wherein vacuum degree adjusts component and is connected to vacuum chamber 1, described
Top gun moving assembly includes top gun 2 and fixing bolt 3, and wherein 2 one end of top gun is connect with fixing bolt 3, and wherein fixing bolt 3 can
1 top of vacuum chamber is fixed in rotation, and 2 outer wall of top gun is equipped with screw thread, and wherein the screw thread of 2 outer wall of top gun can be with fixing bolt 3
Screw-internal thread fit move up and down top gun 2, the fixing bolt 3 connects servo motor, and wherein servo motor connection control is single
Member.
As shown in Figure 2, it is preferred that the vacuum degree adjust component include vacuum degree regulating valve 4, it is vacuum degree stop valve 5, true
Reciprocal of duty cycle adjusts pipeline 6 and the first booster pump 7, and wherein vacuum degree adjusts the exhaust gas discharge of 6 one end of pipeline connection equipment for vacuum refining
Pipe, vacuum degree adjust 6 other end of pipeline and connect vacuum degree stop valve 5, and 5 other end of vacuum degree stop valve connects vacuum degree tune
Valve 4 is saved, wherein 4 other end of vacuum degree regulating valve connects the first booster pump 7, and the other end of first booster pump 7 connects vacuum
Room 1, the vacuum degree regulating valve 4, vacuum degree stop valve 5 and the first booster pump 7 are separately connected control unit.
As shown in Figure 2, it is preferred that first booster pump 7 also connects the second booster pump 8 by pipeline, wherein second increases
Press pump 8 can be introduced directly into air from atmosphere, and second booster pump 8 connects control unit.
As shown in Figure 2, it is preferred that 2 lower end of top gun is equipped with aditus laryngis 9, and wherein 9 inner top side of aditus laryngis is equipped with first pressure
Sensor 10, wherein 9 inside lower end of aditus laryngis is equipped with second pressure sensor 11, and the 9 outside lower end of aditus laryngis is equipped with highly sensing
Device 12, the first pressure sensor 10, second pressure sensor 11 and height sensor 12 are separately connected control unit.
Preferably, described control unit is calculated by the following formula the oxygen injection rate of distance and top gun of the top gun away from molten steel:
In above formula:
V: the oxygen injection rate of top gun；
N: constant；
D: top gun throat diameter；
Pin: aditus laryngis inlet pressure；
Pout: the indoor vacuum degree of aditus laryngis outlet pressure, as vacuum；
K: constant；
Ma: aditus laryngis exit Mach number；
Ho: distance of the top gun away from molten steel；
: pit depth.
Preferably, a kind of top gun oxygen blast control method of novel evacuated purifier as described above, comprising the following steps:
Step 1) enters the vacuum processing stage when molten steel, needs oxygenation amount to control unit input, control unit calculate blowing oxygen quantity,
The oxygen injection rate of top gun, top gun throat diameter, aditus laryngis inlet pressure, aditus laryngis outlet pressure, aditus laryngis exit Mach number, top gun are away from steel
The distance and pit depth of liquid；
Vacuum degree is adjusted the exhaust pipe of 6 one end of pipeline connection equipment for vacuum refining by step 2, and the other end connects vacuum degree
Stop valve 5, then control unit control vacuum degree stop valve 5 is opened, using vacuum degree regulating valve 4 according to the vacuum degree of setting
Value automatically adjusts, and inputs exhaust gas in vacuum chamber followed by after the pressurization of the first booster pump 7, to reach pressure balance；
Top gun 2 is moved to distance of the top gun away from molten steel of calculating by step 3) control unit control top gun moving assembly, utilizes the
One pressure sensor 10 detects aditus laryngis inlet pressure, detects aditus laryngis outlet pressure using second pressure sensor 11, utilizes height
Sensor 12 detects distance of the top gun away from molten steel, and top, which robs 2 positions and sets rear 9 oxygen blast of aditus laryngis, to be started；
Step 4) reaches when needing oxygenation amount of setting when oxygen blast, and oxygen blast terminates, and control unit controls top gun moving assembly for top gun 2
Upper limit position is risen to, oxygen blast process is completed.
Embodiment 8
Described control unit is calculated by the following formula the oxygen injection rate of distance and top gun of the top gun away from molten steel:
In above formula:
V: the oxygen injection rate of top gun；
N: constant；
D: top gun throat diameter；
Pin: aditus laryngis inlet pressure；
Pout: the indoor vacuum degree of aditus laryngis outlet pressure, as vacuum；
K: constant；
Ma: aditus laryngis exit Mach number；
Ho: distance of the top gun away from molten steel；
: pit depth.
Wherein top gun gun bit H=Ho+。
The selection of top gun throat diameter d can be carried out according to above formula, as shown in table 1:
1 top gun throat diameter d of table selection calculates
It is unequivocally demonstrated that in table 1, gives the oxygen injection rate v of the different top guns of oxygen, a different set of top gun larynx can be obtained
Mouth diameter d, with the variation of Mach number, top gun gun bit H and aditus laryngis inlet pressure PinAlso change therewith.
Aditus laryngis outlet pressure P in table 1outFor fixed value, under vacuum conditions, aditus laryngis outlet pressure PoutI.e. vacuum is indoor
Vacuum degree, aditus laryngis inlet pressure Pin corresponding change with the variation of oxygen injection rate v, and aditus laryngis outlet pressure PoutCorresponding vacuum
Indoor vacuum degree then can adjust component by vacuum degree and be able to effective stability contorting, effectively control the stabilization of vacuum degree, larynx
Mouth outlet pressure PoutIt can be definite value, top gun gun bit H robs aditus laryngis outlet side Mach number Ma by the attainable top of oxygen injection rate v institute
It determines, and Mach number Ma and aditus laryngis inlet pressure PinWith aditus laryngis outlet pressure PoutPressure difference it is related, top rob aditus laryngis outlet side horse
The stabilization of conspicuous several Ma, determines top gun gun bit H.
After top gun throat diameter d is determined, it can be deduced that the associated data of one group of oxygen injection rate v and top gun gun bit H, setting
Oxygen injection rate v necessarily corresponds to corresponding top gun gun bit H；Change oxygen injection rate v, top gun gun bit H is also changed correspondingly, is specifically shown in Table
2:
The relationship of table 2 oxygen injection rate and top gun gun bit
According to 2 data of table, oxygen injection rate v, existing corresponding top gun gun bit H is selected to calculate distance Ho of the top gun away from molten steel, connect
Control unit control top gun moving assembly top gun 2 is moved to distance of the top gun away from molten steel of calculating, passed using first pressure
Sensor 10 detects aditus laryngis inlet pressure, detects aditus laryngis outlet pressure using second pressure sensor 11, utilizes height sensor 12
Distance of the top gun away from molten steel is detected, top, which robs 2 positions and sets rear 9 oxygen blast of aditus laryngis, to be started, while adjusting component control using vacuum degree
Vacuum chamber vacuum values (i.e. aditus laryngis outlet pressure P processedout), when oxygen blast reaches when needing oxygenation amount of setting, oxygen blast terminates, and control is single
Top gun 2 is risen to upper limit position by member control top gun moving assembly, and oxygen blast process is completed.
The multiple vacuum chamber can be sequentially connected in series, and the gas outlet connection equipment for vacuum refining of the last one vacuum chamber gives up
Gas delivery pipe, wherein the outlet side connection vacuum degree of the exhaust pipe of equipment for vacuum refining adjusts pipeline.
The working principle of fracturing string of the present invention is as follows:
The present invention calculates the relationship of the oxygen injection rate of distance and top gun of the top gun away from molten steel first with control unit, then sets
Oxygen injection rate v, existing corresponding top gun gun bit H calculate distance Ho of the top gun away from molten steel, and then control unit control top gun is moved
The fixing bolt 3 of dynamic component rotates distance Ho of the top gun away from molten steel that top gun 2 is moved to calculating, utilizes first pressure sensor
10 detection aditus laryngis inlet pressures, are detected aditus laryngis outlet pressure using second pressure sensor 11, are detected using height sensor 12
Distance of the top gun away from molten steel, top, which robs 2 positions and sets rear 9 oxygen blast of aditus laryngis, to be started；Vacuum degree is adjusted into the connection of 6 one end of pipeline simultaneously
The exhaust pipe of equipment for vacuum refining, the other end connect vacuum degree stop valve 5, and then control unit controls vacuum degree stop valve
5 open, and are automatically adjusted using vacuum degree regulating valve 4 according to the vacuum values of setting, increase followed by the first booster pump 7
Exhaust gas is inputted in vacuum chamber after pressure, to reach pressure balance；When oxygen blast reaches when needing oxygenation amount of setting, oxygen blast terminates, control
Top gun 2 is risen to upper limit position by unit control top gun moving assembly processed, and oxygen blast process is completed.
The present invention is that the oxygen injection rate of top gun and top gun are reached optimal oxygen blast recovery rate away from combining at a distance from molten steel,
Improve smelting process efficiency, save steel-making cost, oxygen blast recovery rate height can reduce oxygen consumption, saved refining steel-making at
This, can adjust the process matching relationship between steel making working procedure, optimize smelting process process, improve efficiency.
Control unit of the present invention calculates the oxygen injection rate of distance and top gun of the top gun away from molten steel by formula, in top gun
In the case that throat diameter determines, distance of the top gun away from molten steel is associated with the oxygen injection rate Auto-matching of top gun, oxygen blast recovery rate
It can achieve 68 ~ 80%, be the highest recovery rate of known public data.
Vacuum degree of the present invention adjusts the stabilization that component effectively controls vacuum degree in vacuum chamber, such aditus laryngis outlet pressure
For definite value, calculating can be made to be simplified, data are more reliable, effective, effectively increase oxygen blast recovery rate.
Top gun moving assembly of the present invention can be such that top gun quickly moves up and down, and reach distance of the top gun away from molten steel of requirement, and
And structure is simple, it is easy to operate.
The preferred embodiment for the present invention is explained in detail above, but the present invention is not limited to the above embodiments,
Those of ordinary skill in the art within the scope of knowledge, can also make various without departing from the purpose of the present invention
Variation.
Many other changes and remodeling can be made by not departing from the spirit and scope of the present invention.It should be appreciated that the present invention is not
It is limited to specific embodiment, the scope of the present invention is defined by the following claims.The component that the present embodiment does not describe in detail
With the well-known components and common structure or conventional means of the structure category industry, do not describe one by one here.
Claims (8)
1. a kind of top gun oxygen blast structure of novel evacuated purifier, it is characterised in that: adjust component including vacuum degree, top gun is moved
Dynamic component, vacuum chamber and control unit, wherein vacuum degree adjusts component and control unit is set to outside vacuum chamber, wherein top gun
Moving assembly is set to internal vacuum chamber top, and the vacuum degree adjusts component, top gun moving assembly is separately connected control unit,
Wherein vacuum degree adjusts component and vacuum chamber, and the top gun moving assembly includes top gun and fixing bolt, wherein top gun one
End is connect with fixing bolt, and wherein fixing bolt is rotatably fixed on vacuum chamber top, and the top gun outer wall is equipped with screw thread, wherein
The screw thread of top gun outer wall can be such that top gun moves up and down with the screw-internal thread fit of fixing bolt, the fixing bolt connection servo electricity
Machine, wherein servo motor connects control unit.
2. a kind of top gun oxygen blast structure of novel evacuated purifier according to claim 1, it is characterised in that: described true
It includes that vacuum degree regulating valve, vacuum degree stop valve, vacuum degree adjust pipeline and the first booster pump that reciprocal of duty cycle, which adjusts component, wherein vacuum
Degree adjusts the exhaust pipe of pipeline one end connection equipment for vacuum refining, and wherein the exhaust pipe connection of equipment for vacuum refining is true
The gas outlet of empty room, the vacuum degree adjust the pipeline other end and connect vacuum degree stop valve, the vacuum degree stop valve other end
Vacuum degree regulating valve is connected, wherein the vacuum degree regulating valve other end connects the first booster pump, the other end of first booster pump
The air inlet of vacuum chamber is connected, the vacuum degree regulating valve, vacuum degree stop valve and the first booster pump are separately connected control unit.
3. a kind of top gun oxygen blast structure of novel evacuated purifier according to claim 2, it is characterised in that: described
One booster pump also connects the second booster pump by pipeline, wherein the second booster pump can be introduced directly into air from atmosphere, described second
Booster pump connects control unit.
4. a kind of top gun oxygen blast structure of novel evacuated purifier according to claim 1, it is characterised in that: the top
Rifle lower end is equipped with aditus laryngis, and wherein aditus laryngis inner top side is equipped with first pressure sensor, and wherein aditus laryngis inside lower end is equipped with the second pressure
Force snesor, lower end is equipped with height sensor, the first pressure sensor, second pressure sensor and height on the outside of the aditus laryngis
Degree sensor is separately connected control unit.
5. a kind of top gun oxygen blast structure of described in any item novel evacuated purifiers, feature exist according to claim 1 ~ 4
In: described control unit is calculated by the following formula the oxygen injection rate of distance and top gun of the top gun away from molten steel:
In above formula:
V: the oxygen injection rate of top gun；
N: constant；
D: top gun throat diameter；
Pin: aditus laryngis inlet pressure；
Pout: the indoor vacuum degree of aditus laryngis outlet pressure, as vacuum；
K: constant；
Ma: aditus laryngis exit Mach number；
Ho: distance of the top gun away from molten steel；
: pit depth.
6. a kind of top gun oxygen blast control method of novel evacuated purifier as claimed in claim 5, which is characterized in that including
Following steps:
Step 1) enters the vacuum processing stage when molten steel, needs oxygenation amount to control unit input, control unit calculate blowing oxygen quantity,
The oxygen injection rate of top gun, top gun throat diameter, aditus laryngis inlet pressure, aditus laryngis outlet pressure, aditus laryngis exit Mach number, top gun are away from steel
The distance and pit depth of liquid；
Vacuum degree is adjusted the exhaust pipe of pipeline one end connection equipment for vacuum refining by step 2, and other end connection vacuum degree is cut
Disconnected valve, then control unit control vacuum degree stop valve is opened, using vacuum degree regulating valve according to the vacuum values of setting into
Row automatic adjustment inputs exhaust gas in vacuum chamber followed by after the pressurization of the first booster pump, to reach pressure balance；
Top gun is moved to distance of the top gun away from molten steel of calculating by step 3) control unit control top gun moving assembly, utilizes first
Pressure sensor detects aditus laryngis inlet pressure, detects aditus laryngis outlet pressure using second pressure sensor, utilizes height sensor
Distance of the top gun away from molten steel is detected, top, which takes a position, to be set rear aditus laryngis oxygen blast and start；
Step 4) reaches when needing oxygenation amount of setting when oxygen blast, and oxygen blast terminates, and control unit controls top gun moving assembly for top gun
Upper limit position is risen to, oxygen blast process is completed.
7. a kind of top gun oxygen blast control method of novel evacuated purifier according to claim 6, it is characterised in that: institute
The first booster pump stated in step 2 also connects the second booster pump by pipeline, and the gas adjusted for vacuum degree can be straight from atmosphere
Connect introducing.
8. a kind of top gun oxygen blast control method of novel evacuated purifier according to claim 6, it is characterised in that: institute
The vacuum values set in step 2 are stated as 80 ~ 120mbar.
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| JPH07138633A (en) * | 1993-11-15 | 1995-05-30 | Kawasaki Steel Corp | Production of extra-low carbon steel by vacuum degassing |
| JPH09143545A (en) * | 1995-11-21 | 1997-06-03 | Nippon Steel Corp | Vacuum oxygen-blowing method of molten steel |
| CN101063523A (en) * | 2006-04-28 | 2007-10-31 | 袁林 | Multifunctional top-gun of together using channel for RH vacuum firing furnace |
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| CN103509912A (en) * | 2012-06-29 | 2014-01-15 | 宝山钢铁股份有限公司 | Method for controlling temperature rise in secondary combustion of vacuum refining exhaust gas |
| CN204509387U (en) * | 2014-12-26 | 2015-07-29 | 宝钢不锈钢有限公司 | Steelmaking oxygen blowing vacuum degree equilibrium control device |
| CN209873009U (en) * | 2019-03-14 | 2019-12-31 | 中国重型机械研究院股份公司 | Novel top lance oxygen blast structure of vacuum refining device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07138633A (en) * | 1993-11-15 | 1995-05-30 | Kawasaki Steel Corp | Production of extra-low carbon steel by vacuum degassing |
| JPH09143545A (en) * | 1995-11-21 | 1997-06-03 | Nippon Steel Corp | Vacuum oxygen-blowing method of molten steel |
| CN101063523A (en) * | 2006-04-28 | 2007-10-31 | 袁林 | Multifunctional top-gun of together using channel for RH vacuum firing furnace |
| CN102154535A (en) * | 2011-03-28 | 2011-08-17 | 中国重型机械研究院有限公司 | Vacuum degree gas saving regulation system |
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