CN106048136B - One kind steel-making tapping process dusts method of deoxidation and system online - Google Patents
One kind steel-making tapping process dusts method of deoxidation and system online Download PDFInfo
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- CN106048136B CN106048136B CN201610602812.2A CN201610602812A CN106048136B CN 106048136 B CN106048136 B CN 106048136B CN 201610602812 A CN201610602812 A CN 201610602812A CN 106048136 B CN106048136 B CN 106048136B
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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
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/04—Removing impurities by adding a treating agent
- C21C7/06—Deoxidising, e.g. killing
-
- 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
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/0037—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00 by injecting powdered material
- C21C7/0043—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00 by injecting powdered material into the falling stream of molten metal
-
- 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
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/0068—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00 by introducing material into a current of streaming metal
Abstract
The present invention principally falls into steelmaking technical field, and in particular to one kind steel-making tapping process dusts method of deoxidation and system online.In the steel-making tapping process of smelting, according to smelting endpoint molten steel parameter, with reference to the refining pre- period parameters of link target molten steel, the constituent and each component quality of required deoxidation pulvis are calculated and complete to match online, determine the deoxidization technique parameter of dusting of tapping process, using spray gun directly to tapping steel stream injection carrier gas deoxidation pulvis high speed powder air-flow, realize that steel-making tapping process dusts deoxidation online, be precisely controlled tapping molten steel component.The method of the invention and system can improve deoxidier utilization ratio, stable to refine link smelting process rhythm, improve product quality.
Description
Technical field
The present invention principally falls into steelmaking technical field, and in particular to one kind steel-making tapping process dust online method of deoxidation and
System.
Background technology
Modern times steel-making, including converter and electric-arc furnace steelmaking, widely used enhanced oxygen blowing technology are smelted.Enhanced oxygen blowing smelting
For refining technology while accelerating to make steel rhythm, the problems such as also bringing smelting endpoint difficulty, terminal molten steel peroxidating problem is universal
In the presence of serious.
Convertor steelmaking process oxygen supply intensity is big, because its Terminal Process Control model has certain error, often occurs
Terminal molten steel peroxidating phenomenon, particularly in the middle and later periods in furnace life, because bottom blowing spray nozzle clogging and melting pool shape irregularly change, melt
Pond metallurgical reaction dynamic conditions is deteriorated, and terminal molten steel peroxidating phenomenon further deteriorates.Electric-arc furnace steelmaking is special due to its
Furnace type structure, stirring intensity of molten pool is weak, and dynamic conditions is poor, and to shorten the heat, reducing power consumption, widely used strengthen supplies
Oxygen technology, but the terminal manual sampling detection of electric-arc furnace steelmaking generally use and experience decision method control electric arc furnace smelting terminal,
The limitation that this method is judged due to offline inspection and experience, electric-arc furnace steelmaking terminal molten steel oxygen content is inclined in actual production process
It is high；Simultaneously as electric arc furnace smelting operating mode is complicated, electric-arc furnace steelmaking static models, dynamic model and the electricity of flue gas analysis are relied on
Arc stove steel-making end-point control method reliability is not high, also tends to smelting endpoint molten steel peroxidating phenomenon occur.
In actual production process, it is de- often to put into block Antaciron, silicomangan etc. into tapping ladle using directly
The method of oxygen agent carries out molten steel pre-deoxidation.Molten steel pre-deoxidation effect is most important to the control of subsequent smelting process steel inclusion,
But in the method, deoxidier addition is difficult to control, block deoxidier utilization ratio is relatively low, and consumption is higher, and after pre-deoxidation
Molten steel component etc. is not easy stability contorting.Therefore, how to be precisely controlled molten steel oxygen content after tapping, reduce deoxidier consumption, simultaneously
Steady production rhythm, be it is current ensure pneumatic steelmaking and Electric Arc Furnace Steelmaking Flow it is efficient smelt and product quality it is crucial and prominent
Go wrong.
The content of the invention
Method of deoxidation and system in view of the above-mentioned problems, a kind of steel-making tapping process of present invention proposition dusts online are stable to turn
Molten steel component after stove and arc furnace tapping, deoxidier usage amount is reduced, high-quality molten steel is provided for follow-up refining link.The present invention
Methods described in smelting process according to relevant parameters such as terminal molten steel component, temperature and molten steel weight, with reference to needed for refining link
Target molten steel component and temperature requirement, required deoxidation pulvis composition is calculated online and completes to match, dynamic adjusts deoxidation
Pulvis and carrier gas injection parameter, using spray gun directly to tapping steel stream injection carrier gas-deoxidation pulvis high speed powder air-flow, realize steel-making
Tapping process is dusted deoxidation online, is precisely controlled tapping molten steel component, improves deoxidier utilization ratio, and the stable link that refines is smelted
Technique rhythm, improve product quality.
The present invention is achieved by the following technical solutions：
A kind of tapping process of making steel dusts the method for deoxidation online, in the steel-making tapping process of smelting, according to smelting eventually
Point molten steel parameter, with reference to the refining pre- period parameters of link target molten steel, to the constituent and each component quality of required deoxidation pulvis
Calculated and complete to match online, determine the deoxidization technique parameter of dusting of tapping process, using spray gun directly to tapping steel stream
Spray carrier gas-deoxidation pulvis high speed powder air-flow, realize that steel-making tapping process dusts deoxidation online, be precisely controlled tapping molten steel into
Point.
Further, methods described is applied to the steel-making tapping process of 80-350t converters or 30-250t electric arc furnaces.
Further, the spray gun uses single tube or circumferential weld sleeve pipe；
Wherein, the circumferential weld sleeve pipe includes the central tube for being blown carrier gas-deoxidation pulvis and protects gas for being blown
Circumferential weld pipe, the inner diameter of centerpipe size are 8 ~ 30mm, 1.5 ~ 8mm of wall thickness, the circumferential weld gap of central tube and circumferential weld pipe for 1 ~
10mm；
The lance outlet uses straight pipe type nozzle or Laval nozzle, and lance outlet horizontal sextant angle is 0 ~ 60 °, spray gun
Apart from tapping hole 100-1500mm.
Further, carrier gas is any one in nitrogen, argon gas and carbon dioxide or any two or more mixing
Gas；The protective gas of the circumferential weld pipe injection is any one in nitrogen, argon gas, carbon dioxide and air or any two kinds
Mixed gas above.
Further, the deoxidation pulvis is carbon dust, coal dust, ferrosilicon powder, silicomanganese powder, aluminium manganese powder and calcium-silicon compound deoxident
In any one or any two or more mixture；The particle diameter of the deoxidation pulvis is 15 μm ~ 3.0mm.
Further, the deoxidization technique state modulator that dusts of tapping process is：Carrier gas flux is 50 ~ 1000Nm3/ h, deoxidation
Pulvis injection rate is 0 ~ 200kg/min, and the flow for being blown protective gas is 10 ~ 500Nm3/ h, lance outlet distance tapping steel
Flow 50-600mm.
Further, methods described specifically includes following steps：
（1）Refine the setting of the pre- period parameters of link target molten steel：Target molten steel parameter database is set according to steel grade is smelted
The pre- period parameters of target molten steel of link are refined, the pre- period parameters of target molten steel include target molten steel oxygen content, target molten steel carbon
Content, target molten steel silicone content, target molten steel temperature；
（2）The collection of smelting endpoint molten steel parameter：Molten steel component and temperature data acquisition module obtain smelting endpoint molten steel
Parameter, the smelting endpoint molten steel parameter include terminal molten steel oxygen content, terminal molten steel carbon content, terminal molten steel silicone content, end
Point molten steel temperature, terminal molten steel weight；
（3）Tapping process dusts the determination of deoxidization technique parameter：According to step（1）With（2）The refining link mesh of middle acquisition
The pre- period parameters of mark molten steel and smelting endpoint molten steel parameter, deoxidation pulvis calculation module are based on material balance and energy balance
Constituent needed for deoxidation pulvis and each composition quality are calculated；
Blowing process, which is formulated module and calculated, to be obtained tapping process and dusts deoxidization technique parameter, the deoxidation work of dusting of tapping process
Skill state modulator is：Carrier gas flux is 50 ~ 1000Nm3/ h, deoxidation pulvis injection rate are 0 ~ 200kg/min, and circumferential weld pipe is blown
The flow of protective gas is 10 ~ 500Nm3/ h, lance outlet distance tapping steel stream 50-600mm；
（4) the online proportioning of deoxidation pulvis component：The online matching system of deoxidation pulvis is according to step（3）Middle deoxidation pulvis group
The result of calculation of computing module is divided to complete the on-line weighing and mixing match of deoxidation pulvis each component, by deoxidation powder after the completion of proportioning
Agent is placed in powder spraying pot storage；
（5）The regulation and control of spray gun initial position：Spray gun clamping device motion-control module is by controlling spray gun clamping device
Motion, initial, set position is moved to by spray gun；
（6）Tapping process dusts deoxidation online：Start to tap, after tapping steel stream is stable, blowing process is formulated module and started
Powder spraying system and air supply system, dusted deoxidization technique parameter according to tapping process, control spray gun directly carries to tapping steel stream injection
Gas-deoxidation pulvis high speed powder air-flow, carry out the online deoxidation of dusting of tapping process；
（7）Burners Positions dynamic adjusts：During the injection of deoxidation pulvis, according to tilting furnace position and angle, spray gun folder
Mechanism kinematic control module is held by controlling the motion of spray gun clamping device, dynamic adjusts Burners Positions；
（8）Terminate online deoxidation of dusting：Powder spraying system and air supply system stop spray in the case where blowing process formulates module effect
Stripping oxygen pulvis, tapping process dust end, and spray gun resets, and wait next stove to tap.
One kind steel-making tapping process dusts deoxygenation system online, and a kind of to make steel tapping process online using described for the system
Dust the method for deoxidation, the online deoxygenation system that dusts includes control system, the online matching system of deoxidation pulvis, dusting is
System, air supply system, source of the gas, spray gun clamping device, spray gun；The control system includes molten steel component and temperature data acquisition mould
Block, target molten steel parameter database, deoxidation pulvis calculation module, blowing process formulate module, the motion of spray gun clamping device
Control module；
The smelting endpoint molten steel parameter and the target gathered according to the molten steel component and temperature data acquisition module
The pre- period parameters of refining link target molten steel of molten steel parameter database setting, the deoxidation pulvis calculation module are based on physics
Balance and principle of energy balance are in the constituent of deoxidation pulvis needed for line computation and each component quality；
The blowing process, which formulates module and is used to calculate, determines that tapping process dusts deoxidization technique parameter, the deoxidation of dusting
Technological parameter includes deoxidation pulvis injection rate, carrier gas injection flow, circumferential weld protection gas blowout wind drift amount, lance outlet and tapping steel
The distance of stream；And the blowing process formulates module by controlling powder spraying system and air supply system to complete carrier gas-deoxidation pulvis
The dynamic injection of high speed powder air-flow；
The online matching system of deoxidation pulvis is complete for the result of calculation according to the deoxidation pulvis calculation module
Into the online proportioning of deoxidation pulvis.
Further, the online deoxygenation system that dusts also includes being used for the spray gun clamping device for adjusting Burners Positions；Institute
Stating control system also includes spray gun clamping device motion-control module, and the spray gun clamping device motion-control module is used to control
The motion of the spray gun clamping device, the spray gun clamping device motion-control module can be according to tilting furnace position and angle
Degree, dynamic adjust Burners Positions.
Further, molten steel component and the temperature data acquisition module is used to gather smelting endpoint molten steel parameter, described
Smelting endpoint molten steel parameter includes terminal molten steel oxygen content, terminal molten steel carbon content, terminal molten steel silicone content, terminal molten steel temperature
Degree, terminal molten steel weight；
The target molten steel parameter database is used to be expected according to the species setting refining link target molten steel for smelting steel grade
Parameter, the target molten steel parameter include target molten steel oxygen content, target molten steel carbon content, target molten steel silicone content, target steel
Liquid temperature degree.
The advantageous effects of the present invention：
The method of the invention can realize that steel-making tapping process dusts deoxidation online, be precisely controlled tapping molten steel component,
Deoxidier utilization ratio is improved, deoxidier can be significantly improved by molten steel oxygen content deviation stability contorting after tapping ± 0.002%
Utilization ratio, the consumption of smelting process alloy material reduce by more than 10%, stable refining link smelting process rhythm, improve product quality.
Brief description of the drawings
Fig. 1 is that converter of the present invention and electric-arc furnace steelmaking tapping process dust deoxygenation system connection figure online；
Fig. 2 is spray gun of the present invention and tapping steel stream relative position schematic diagram；
Fig. 3 dusts method of deoxidation and the control logic block diagram of system online for present invention steel-making tapping process；
Reference：1. control system, 2. circumferential weld air supply systems, 3. powder spraying systems, 4. carrier gas air supply systems, 5. spray guns press from both sides
Hold mechanism kinematic control module, 6. converters or electric arc furnaces, 7. tapping holes, 8. powder spraying pots, 9. pulvis flow control systems, 10. loads
Source of the gas, 11. carrier gas flux control modules, 12. spray gun circumferential weld sources of the gas, 13. spray gun circumferential weld throughput control modules, 14. powder air-flows
Conveyance conduit, 15. spray gun circumferential weld letter shoot roads, 16. spray gun clamping devices, 17. powder air-flow distributors, 18. spray guns, 19. go out
Steel steel stream, 20. deoxidation pulvis line matching systems, 21-24 are all kinds of deoxidation pulvis hold-up tanks.
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, it is right below in conjunction with drawings and Examples
The present invention is explained in further detail.It should be appreciated that specific embodiment described herein is used only for explaining the present invention, and
It is not used in the restriction present invention.
On the contrary, the present invention covers any replacement done in the spirit and scope of the present invention being defined by the claims, repaiied
Change, equivalent method and scheme.Further, in order that the public has a better understanding to the present invention, below to the thin of the present invention
It is detailed to describe some specific detail sections in section description.Part without these details for a person skilled in the art
Description can also understand the present invention completely.
Embodiment 1
One kind steel-making tapping process dusts method of deoxidation online, in the steel-making tapping process of smelting, according to smelting endpoint
Molten steel parameter, with reference to the refining pre- period parameters of link target molten steel, the constituent and each component quality of required deoxidation pulvis are entered
Row calculates and completes to match online, determines the deoxidization technique parameter of dusting of tapping process, using spray gun directly to tapping steel stream spray
Penetrate carrier gas-deoxidation pulvis high speed powder air-flow, realize that steel-making tapping process dusts deoxidation online, is precisely controlled tapping molten steel component,
It can be impacted using high speed powder air-flow, deoxidation pulvis molten steel of deeply tapping fully is contacted with molten steel, deoxidation pulvis and oxygen in molten steel
The violent metallurgical reaction of generation, hence it is evident that improve metallurgical reaction intensity in deoxidation pulvis utilization ratio and molten steel.
In the present embodiment, methods described is applied to 100t electric-arc furnace steelmakings, is provided with arc furnace tapping steel stream both sides
Two spray guns, spray gun internal diameter 14mm, circumferential weld gap 3mm, using stainless steel.Lance outlet is designed using straight pipe type nozzle,
30 ° of lance outlet and horizontal plane angle.Deoxidation pulvis uses carbon dust, Antaciron, silicomangan and alumal, deoxidation pulvis
Particle diameter is 600 μm, and single rifle speed of dusting is 0 ~ 50kg/min.Carrier gas is carbon dioxide, single rifle carrier gas flux 50 ~
1000Nm3/h.Circumferential weld gas is nitrogen, and single rifle flow is 10 ~ 500Nm3/h.Methods described is specially：
（1）Refine the setting of the pre- period parameters of link target molten steel：Target molten steel parameter database is set according to steel grade is smelted
The pre- period parameters of target molten steel of link are refined, the pre- period parameters of target molten steel include target molten steel oxygen content 0.028%（Quality
Percentage）, target molten steel carbon content 0.10%（Mass percent）, target molten steel silicone content 0.10%（Mass percent）, target
1630 DEG C of molten steel temperature；
（2）The collection of smelting endpoint molten steel parameter：It is whole that molten steel component and temperature data acquisition module obtain electric arc furnace smelting
Point molten steel parameter, the smelting endpoint molten steel parameter include terminal molten steel oxygen content 0.054%（Mass percent）, terminal molten steel
Carbon content 0.096%（Mass percent）, terminal molten steel silicone content 0.060%（Mass percent）, 1670 DEG C of terminal molten steel temperature,
Terminal molten steel weight 100t；
（3）Tapping process dusts the determination of deoxidization technique parameter：According to step（1）With（2）The refining link mesh of middle acquisition
The pre- period parameters of mark molten steel and smelting endpoint molten steel parameter, deoxidation pulvis calculation module are based on physical equilibrium and energy balance
Principle is calculated constituent needed for deoxidation pulvis and each composition quality, and result of calculation is：Carbon dust 30kg, Antaciron
15kg, silicomangan 5kg, alumal 10kg；
Blowing process, which is formulated module and calculated, to be obtained tapping process and dusts deoxidization technique parameter：Specially utilize terminal molten steel matter
Amount and tapping hole producing steel velocity calculate the tapping time；Single rifle is calculated using deoxidation pulvis quality, spray gun number and tapping time to take off
Oxygen pulvis injection rate；Carrier gas flux is calculated using pulvis injection rate, powder to air ratio and powder airflow pipeline parameter；Utilize list
Rifle pulvis injection rate and carrier gas flux determine lance outlet to steel stream distance and the circumferential weld gas blowout wind drift amount of tapping.It is described to tap
Journey deoxidization technique parameter of dusting is specially：The tapping time is 120s, single rifle deoxidation pulvis injection rate is 20kg/min, carrier gas stream
Measure as 300Nm3/ h, the flow of circumferential weld pipe injection protection gas are 100Nm3/ h, lance outlet to steel stream distance of tapping are 400mm；
（4）The online proportioning of deoxidation pulvis component：The online matching system of deoxidation pulvis is according to step（3）Middle deoxidation pulvis
The result of calculation of calculation module completes the on-line weighing and mixing match of deoxidation pulvis each component, and specific proportioning is：Deoxidation
Pulvis component carbon dust 30kg, Antaciron 15kg, silicomangan 5kg, alumal 10kg；Deoxidation pulvis after the completion of proportioning is put
Stored in powder spraying pot；
（5）The regulation and control of spray gun initial position：Spray gun clamping device motion-control module is by controlling spray gun clamping device
Motion, spray gun is moved to distance tapping steel stream 400mm（Initial, set position）；
（6）Tapping process dusts deoxidation online：Electric arc furnaces starts to tap, and steel stream of being tapped after 10s is stable, and blowing process is formulated
Module starts powder spraying system and air supply system, is dusted deoxidization technique parameter according to tapping process, control spray gun is directly to tapping steel
Stream injection carrier gas-deoxidation pulvis high speed powder air-flow, carry out the online deoxidation of dusting of tapping process；Single rifle speed of dusting is controlled to be
20kg/min, carrier gas flux are 300 Nm3/ h, circumferential weld gas flow are 100Nm3/h；
（7）Burners Positions dynamic adjusts：During the injection of deoxidation pulvis, according to tilting furnace position and angle, spray gun folder
Mechanism kinematic control module is held by controlling the motion of spray gun clamping device, dynamic adjusts Burners Positions；
（8）Terminate online deoxidation of dusting：Dust after 90s, powder spraying system and air supply system are formulated module in blowing process and made
Stop being blown deoxidation pulvis with lower, tapping process dusts ends, and spray gun resets, and waits next stove tapping.
After the method for the invention, molten steel ladle oxygen content stabilization exists after 100t electric-arc furnace steelmakings tapping
0.0028% ± 0.001%, the consumption of smelting process alloy material reduces by 15 ~ 20%, hence it is evident that improves quality of molten steel, stabilizes subsequent fine
Refining and continuous casting link technique and rhythm of production.
Embodiment 2
One kind steel-making tapping process dusts method of deoxidation online, in the steel-making tapping process of smelting, according to smelting endpoint
Molten steel parameter, with reference to the refining pre- period parameters of link target molten steel, the constituent and each component quality of required deoxidation pulvis are entered
Row calculates and completes to match online, determines the deoxidization technique parameter of dusting of tapping process, using spray gun directly to tapping steel stream spray
Penetrate carrier gas-deoxidation pulvis high speed powder air-flow, realize that steel-making tapping process dusts deoxidation online, is precisely controlled tapping molten steel component,
It can be impacted using high speed powder air-flow, deoxidation pulvis molten steel of deeply tapping fully is contacted with molten steel, deoxidation pulvis and oxygen in molten steel
The violent metallurgical reaction of generation, hence it is evident that improve metallurgical reaction intensity in deoxidation pulvis utilization ratio and molten steel.
This method is made steel applied to 150t pneumatic steelmakings in the present embodiment, is installed respectively in arc furnace tapping steel stream both sides
There are 2 spray guns, spray gun internal diameter 8mm, circumferential weld gap 2mm, using stainless steel.Lance outlet is set using Laval nozzle
45 ° of meter, lance outlet and horizontal plane angle.Deoxidation pulvis uses carbon dust, calcium-silicon compound deoxident and alumal, deoxidation pulvis
Particle diameter is 300 μm, and single rifle speed of dusting is 0 ~ 30kg/min, and carrier gas is argon gas, 50 ~ 500Nm of single rifle carrier gas flux3/h。
Circumferential weld gas is carbon dioxide, and single rifle flow is 10 ~ 500Nm3/h.Methods described is specially：
（1）Refine the setting of the pre- period parameters of link target molten steel：Target molten steel parameter database is set according to steel grade is smelted
The pre- period parameters of target molten steel of link are refined, the pre- period parameters of target molten steel include target molten steel oxygen content 0.024%（Quality
Percentage）, target molten steel carbon content be 0.10%（Mass percent）, target molten steel silicone content 0.16%（Mass percent）, mesh
Mark 1620 DEG C of molten steel temperature；
（2）The collection of smelting endpoint molten steel parameter：It is whole that molten steel component and temperature data acquisition module obtain electric arc furnace smelting
Point molten steel parameter, the smelting endpoint molten steel parameter include terminal molten steel oxygen content 0.046%（Mass percent）, terminal molten steel
Carbon content 0.08%（Mass percent）, terminal molten steel silicone content 0.060%（Mass percent）, 1670 DEG C of terminal molten steel temperature,
Terminal molten steel weight 150t；
（3）Tapping process dusts the determination of deoxidization technique parameter：According to step（1）With（2）The refining link mesh of middle acquisition
The pre- period parameters of mark molten steel and smelting endpoint molten steel parameter, deoxidation pulvis calculation module are based on material balance and energy balance
Constituent needed for deoxidation pulvis and each composition quality are calculated, result of calculation is：Carbon dust 80kg, calcium-silicon compound deoxident
65kg, alumal 35kg；
Blowing process, which is formulated module and calculated, to be obtained tapping process and dusts deoxidization technique parameter：Specially utilize terminal molten steel matter
Amount and tapping hole producing steel velocity calculate the tapping time；Single rifle is calculated using deoxidation pulvis quality, spray gun number and tapping time to take off
Oxygen pulvis injection rate；Carrier gas flux is calculated using pulvis injection rate, powder to air ratio and powder airflow pipeline parameter；Utilize list
Rifle pulvis injection rate and carrier gas flux determine lance outlet to steel stream distance and the circumferential weld gas blowout wind drift amount of tapping.In the present embodiment
It is middle control tapping the time be 180s, single rifle deoxidation pulvis injection rate is 15kg/min, carrier gas flux 200Nm3/ h, circumferential weld pipe
The flow of injection protection gas is 100Nm3/ h, lance outlet to steel stream distance of tapping is 250mm；
（4）The online proportioning of deoxidation pulvis component：The online matching system of deoxidation pulvis is according to step（3）Middle deoxidation pulvis group
The result of calculation of computing module is divided to complete the on-line weighing and mixing match of deoxidation pulvis each component, specific proportioning is：Carbon dust
80kg, calcium-silicon compound deoxident 65kg, alumal 35kg；Deoxidation pulvis after the completion of proportioning is placed in powder spraying pot storage；
（5）The regulation and control of spray gun initial position：Spray gun clamping device motion-control module is by controlling spray gun clamping device
Motion, spray gun is moved to distance tapping steel stream 250mm（Initial, set position）；
（6）Tapping process dusts deoxidation online：Electric arc furnaces starts to tap, and steel stream of being tapped after 10s is stable, and blowing process is formulated
Module starts powder spraying system and air supply system, is dusted deoxidization technique parameter according to tapping process, control spray gun is directly to tapping steel
Stream injection carrier gas-deoxidation pulvis high speed powder air-flow, carry out the online deoxidation of dusting of tapping process；Single rifle speed of dusting is controlled to be
15kg/min, carrier gas flux are 200 Nm3/ h, circumferential weld gas flow are 100Nm3/h；
（7）Burners Positions dynamic adjusts：During the injection of deoxidation pulvis, according to tilting furnace position and angle, spray gun folder
Mechanism kinematic control module is held by controlling the motion of spray gun clamping device, dynamic adjusts Burners Positions；
（8）Terminate online deoxidation of dusting：Dust after 180s, powder spraying system and air supply system are formulated module in blowing process and made
Stop being blown deoxidation pulvis with lower, tapping process dusts ends, and spray gun resets, and waits next stove tapping.
After the method for the invention, molten steel ladle oxygen content stabilization exists after 150t electric-arc furnace steelmakings tapping
0.0024% ± 0.001%, the consumption of smelting process alloy material reduces by 10 ~ 12%, hence it is evident that improves quality of molten steel, stabilizes subsequent fine
Refining and continuous casting link technique and rhythm of production.
Embodiment 3
As Figure 1-3, a kind of steel-making tapping process dusts deoxygenation system online, the system Application Example 1 or real
Apply the methods described of example 2；The steel-making tapping process that the system is applied to converter or electric arc furnaces 6 is smelted, the online deoxidation of dusting
System includes control system 1, the online matching system 20 of deoxidation pulvis, powder spraying system 3, air supply system（Including circumferential weld air supply system 2
With carrier gas air supply system 4）, source of the gas（Including carrier gas source 10 and spray gun circumferential weld source of the gas 12）, spray gun clamping device 16, spray gun 18；Institute
State control system and include molten steel component and temperature data acquisition module, target molten steel parameter database, deoxidation pulvis calculation
Module, blowing process formulate module, spray gun clamping device motion-control module；
The smelting endpoint molten steel parameter and the target gathered according to the molten steel component and temperature data acquisition module
The pre- period parameters of refining link target molten steel of molten steel parameter database setting, the deoxidation pulvis calculation module is in line computation
The constituent and each component quality of required deoxidation pulvis；
The blowing process, which is formulated module and calculated, determines that tapping process dusts deoxidization technique parameter, and the tapping process dusts
Deoxidization technique parameter includes the injection parameter of tapping process time, deoxidation pulvis, carrier gas and protective gas, specially utilizes terminal
Quality of molten steel and tapping hole producing steel velocity calculate the tapping time；Calculated using deoxidation pulvis quality, spray gun number and tapping time
Single rifle deoxidation pulvis injection rate；Carrier gas flux is calculated using pulvis injection rate, powder to air ratio and powder airflow pipeline parameter；
Determine lance outlet to steel stream distance and the circumferential weld gas blowout wind drift amount of tapping using single rifle pulvis injection rate and carrier gas flux.And
The blowing process formulates module by controlling powder spraying system and air supply system to complete the dynamic of carrier gas-deoxidation pulvis high speed powder air-flow
State is blown；
The spray gun 18 uses single-tube or circumferential weld sleeve design, and inner diameter of centerpipe size is 8 ~ 30mm, and wall thickness 0.5 ~
8mm, 1 ~ 10mm of circumferential weld gap.The outlet of spray gun 18 is designed using straight pipe type nozzle or Laval nozzle, the horizontal folder of lance outlet
0 ~ 60 ° of angle（Angle A in Fig. 2）, lance outlet distance tapping steel stream 50-600mm（Distance D in Fig. 2）, spray gun 18 is apart from tapping hole 7
Distance 200-1500mm（Distance L in Fig. 2）.The spray gun central tube is blown carrier gas-deoxidation pulvis high speed powder air-flow, the spray of circumferential weld pipe
Protective gas is blown to ensure high speed powder gas shock kinetic energy.The carrier gas is any one in nitrogen, argon gas and carbon dioxide
Kind or any two or more mixed gas.The deoxidation pulvis is carbon dust, coal dust, Antaciron, silicomangan, alumal
With any one or any two or more mixtures in calcium-silicon compound deoxident, a diameter of 15 μm of deoxidation powder particles ~
3.0mm.Circumferential weld protective gas is any one or any two or more mixing in nitrogen, argon gas, carbon dioxide and air
Gas.The carrier gas flux for carrier gas-deoxidation pulvis high speed powder air-flow that the spray gun central tube sprays and dust speed and circumferential weld
The flow dynamics of pipe injection circumferential weld protective gas are adjustable.
System described in the present embodiment is applied to 80-350t pneumatic steelmakings or 30-250t electric-arc furnace steelmakings tapping process sprays
Powder deoxidation.Different according to the type of furnace and heat size, 1 ~ 8 spray gun of installation carries out supply and dusted smelting, and spray gun number is according to smelter
Skill requirement and execute-in-place condition determine.The high speed powder air-flow distributor powder air stream outlet number is consistent with spray gun number.
Supplied by control system 1, spray gun clamping device 16, the circumferential weld gas air supply system 2 of spray gun, powder spraying system 3, carrier gas
System 4 can realize that Burners Positions and injection parameter dynamic are adjustable.The present invention can dynamically adjust according to operating mode and technological requirement is smelted
Deoxidation pulvis, carrier gas and circumferential weld Gas injection parameter, realize that steel-making tapping process dusts deoxidation online.It is 50 to control carrier gas flux
~1000Nm3/ h, deoxidation pulvis injection rate are 0 ~ 200kg/min, and circumferential weld pipe blowing gas flow is 10 ~ 500Nm3/h。
The online matching system of deoxidation pulvis is complete for the result of calculation according to the deoxidation pulvis calculation module
Into the online proportioning of deoxidation pulvis, different deoxidation pulvis is stored in 21-24 in all kinds of deoxidation pulvis hold-up tanks respectively before proportioning,
Deoxidation pulvis is placed in powder spraying pot 8 and stored after the completion of proportioning, then controls deoxidation pulvis to flow into powder via pulvis flow control system 9
Flow in airflow pipeline 14, into powder airflow pipeline 14 deoxidation pulvis via powder air-flow distributor 17 from spray gun
18 central tubes spray；
Carrier gas air supply system 4 includes carrier gas source 10 and carrier gas flux control module 11, and carrier gas source 10 is via carrier gas flux control
After molding block 11 controls flow, powder airflow pipeline 14 is flowed into, carrier gas provides power by deoxidation pulvis from the center of spray gun 18
Pipe sprays；
Circumferential weld air supply system 2 includes spray gun circumferential weld source of the gas (storage protection gas) 12 and spray gun circumferential weld throughput control module
13, after spray gun circumferential weld source of the gas 12 controls flow via spray gun circumferential weld throughput control module 13, flow into spray gun circumferential weld letter shoot
Road 15, circumferential weld letter shoot road 15 are connected with spray gun 18, and spray gun circumferential weld source of the gas sprays from the circumferential weld of spray gun 18.
The online deoxygenation system that dusts also includes being used for the spray gun clamping device 16 for adjusting Burners Positions；The control system
System also includes spray gun clamping device motion-control module 5, and the spray gun clamping device motion-control module 5 is used to control the spray
The motion of rifle clamping device 16, the spray gun clamping device motion-control module can move according to tilting furnace position and angle
State adjusts Burners Positions.
Molten steel component and the temperature data acquisition module is used to gather smelting endpoint molten steel parameter, the smelting endpoint steel
Liquid parameter includes terminal molten steel oxygen content, terminal molten steel carbon content, terminal molten steel silicone content, terminal molten steel temperature, terminal molten steel
Weight；
The target molten steel parameter database is used to be expected according to the species setting refining link target molten steel for smelting steel grade
Parameter, the target molten steel parameter include target molten steel oxygen content, target molten steel carbon content, target molten steel silicone content, target steel
Liquid temperature degree.
Claims (9)
- A kind of method of deoxidation 1. steel-making tapping process dusts online, it is characterised in that in the steel-making tapping process of smelting, root According to smelting endpoint molten steel parameter, with reference to the refining pre- period parameters of link target molten steel, constituent to required deoxidation pulvis and each Constituent mass is calculated and completes to match online, determines the deoxidization technique parameter of dusting of tapping process, using spray gun directly to Tap steel stream injection carrier gas-deoxidation pulvis high speed powder air-flow, realize that steel-making tapping process dusts deoxidation online, is precisely controlled tapping Molten steel component；Methods described specifically includes following steps：(1) setting of the pre- period parameters of link target molten steel is refined：Target molten steel parameter database refines according to steel grade setting is smelted The pre- period parameters of target molten steel of link, the pre- period parameters of target molten steel include target molten steel oxygen content, target molten steel carbon content, Target molten steel silicone content, target molten steel temperature；(2) collection of smelting endpoint molten steel parameter：Molten steel component and temperature data acquisition module obtain smelting endpoint molten steel parameter, The smelting endpoint molten steel parameter includes terminal molten steel oxygen content, terminal molten steel carbon content, terminal molten steel silicone content, terminal molten steel Temperature, terminal molten steel weight；(3) tapping process dusts the determination of deoxidization technique parameter：According to the refining link target steel obtained in step (1) and (2) The pre- period parameters of liquid and smelting endpoint molten steel parameter, deoxidation pulvis calculation module are based on material balance and energy balance to de- Constituent needed for oxygen pulvis and each composition quality are calculated；Blowing process, which is formulated module and calculated, to be obtained tapping process and dusts deoxidization technique parameter, the deoxidization technique ginseng of dusting of tapping process Numerical control is made as：Carrier gas flux is 50~1000Nm3/ h, deoxidation pulvis injection rate are 0~200kg/min, and the injection of circumferential weld pipe is protected The flow for protecting gas is 10~500Nm3/ h, lance outlet distance tapping steel stream 50-600mm；(4) the online proportioning of deoxidation pulvis component：The online matching system of deoxidation pulvis is according to deoxidation pulvis component meter in step (3) The result of calculation for calculating module completes the on-line weighing and mixing match of deoxidation pulvis each component, and deoxidation pulvis after the completion of proportioning is put Stored in powder spraying pot；(5) regulation and control of spray gun initial position：Spray gun clamping device motion-control module by controlling the motion of spray gun clamping device, Spray gun is moved into initial, set position；(6) tapping process dusts deoxidation online：Start to tap, after tapping steel stream is stable, blowing process is formulated module startup and dusted System and air supply system, dusted deoxidization technique parameter according to tapping process, control spray gun is directly to tapping steel stream injection carrier gas-de- Oxygen pulvis high speed powder air-flow, carry out the online deoxidation of dusting of tapping process；(7) Burners Positions dynamic adjusts：During the injection of deoxidation pulvis, according to tilting furnace position and angle, spray gun clamping machine For structure motion-control module by controlling the motion of spray gun clamping device, dynamic adjusts Burners Positions；(8) online deoxidation of dusting is terminated：It is de- that powder spraying system and air supply system stop injection in the case where blowing process formulates module effect Oxygen pulvis, tapping process dust end, and spray gun resets, and wait next stove to tap.
- 2. a kind of tapping process of making steel dusts the method for deoxidation online according to claim 1, it is characterised in that methods described Suitable for 80-350t converters or the steel-making tapping process of 30-250t electric arc furnaces.
- 3. a kind of tapping process of making steel dusts the method for deoxidation online according to claim 1, it is characterised in that the spray gun Using single tube or circumferential weld sleeve pipe；Wherein, the circumferential weld sleeve pipe includes being used for the central tube for being blown carrier gas-deoxidation pulvis and the circumferential weld for being blown protection gas Pipe, the inner diameter of centerpipe size be 8~30mm, 1.5~8mm of wall thickness, the circumferential weld gap of central tube and circumferential weld pipe is 1~ 10mm；The lance outlet uses straight pipe type nozzle or Laval nozzle, and lance outlet horizontal sextant angle is 0~60 °, spray gun away from From tapping hole 100-1500mm.
- 4. a kind of tapping process of making steel dusts the method for deoxidation online according to claim 3, it is characterised in that carrier gas is nitrogen Any one in gas, argon gas and carbon dioxide or any two or more mixed gas；The protection of the circumferential weld pipe injection Gas is any one or any two or more mixed gas in nitrogen, argon gas, carbon dioxide and air.
- 5. a kind of tapping process of making steel dusts the method for deoxidation online according to claim 1, it is characterised in that the deoxidation Pulvis is any one in carbon dust, coal dust, ferrosilicon powder, silicomanganese powder, aluminium manganese powder and calcium-silicon compound deoxident or any two kinds Mixture above；The particle diameter of the deoxidation pulvis is 15 μm~3.0mm.
- 6. a kind of tapping process of making steel dusts the method for deoxidation online according to claim 1, it is characterised in that tapping process The deoxidization technique state modulator that dusts be：Carrier gas flux is 50~1000Nm3/ h, deoxidation pulvis injection rate are 0~200kg/ Min, the flow for being blown protective gas are 10~500Nm3/ h, lance outlet distance tapping steel stream 50-600mm.
- 7. a kind of tapping process of making steel dusts the method for deoxidation online according to claim 1, it is characterised in that methods described Dusted online deoxygenation system applied to one kind steel-making tapping process, the online deoxygenation system that dusts includes control system, deoxidation The online matching system of pulvis, powder spraying system, air supply system, source of the gas, spray gun clamping device, spray gun；The control system includes steel Liquid composition and temperature data acquisition module, target molten steel parameter database, deoxidation pulvis calculation module, blowing process are formulated Module, spray gun clamping device motion-control module；The smelting endpoint molten steel parameter gathered according to the molten steel component and temperature data acquisition module and the target molten steel The pre- period parameters of refining link target molten steel of parameter database setting, the deoxidation pulvis calculation module are based on material balance With principle of energy balance in the constituent of deoxidation pulvis needed for line computation and each component quality；The blowing process, which formulates module and is used to calculate, determines that tapping process dusts deoxidization technique parameter, the deoxidization technique that dusts Parameter includes deoxidation pulvis injection rate, carrier gas injection flow, circumferential weld protection gas blowout wind drift amount, lance outlet and tapping steel stream Distance；And the blowing process formulates module by controlling powder spraying system and air supply system to complete carrier gas-deoxidation pulvis at a high speed The dynamic injection of powder air-flow；The online matching system of deoxidation pulvis is used to complete to take off according to the result of calculation of the deoxidation pulvis calculation module The online proportioning of oxygen pulvis.
- 8. a kind of tapping process of making steel dusts the method for deoxidation online according to claim 7, it is characterised in that described online The deoxygenation system that dusts also includes being used for the spray gun clamping device for adjusting Burners Positions；The control system also includes spray gun clamping machine Structure motion-control module, the spray gun clamping device motion-control module are used for the motion for controlling the spray gun clamping device, institute Stating spray gun clamping device motion-control module can be according to tilting furnace position and angle, and dynamic adjusts Burners Positions.
- 9. a kind of tapping process of making steel dusts the method for deoxidation online according to claim 7, it is characterised in that goes out the steel Liquid composition and temperature data acquisition module are used to gather smelting endpoint molten steel parameter, and the smelting endpoint molten steel parameter includes terminal Molten steel oxygen content, terminal molten steel carbon content, terminal molten steel silicone content, terminal molten steel temperature, terminal molten steel weight；The target molten steel parameter database is used to be expected ginseng according to the species setting refining link target molten steel for smelting steel grade Number, the target molten steel parameter include target molten steel oxygen content, target molten steel carbon content, target molten steel silicone content, target molten steel Temperature.
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| CN108060288B (en) * | 2018-01-13 | 2023-02-28 | 山东钢铁股份有限公司 | Pre-deoxidation method and device for blowing carbon powder into converter steel tapping hole |
| CN108251596B (en) * | 2018-04-11 | 2023-08-25 | 北京科技大学 | Fixed converter tapping hole double-nozzle structure |
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| CN112226576B (en) * | 2020-09-27 | 2023-07-14 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Device and method for carbon spraying and deoxidizing by utilizing slag blocking system |
| CN113832286B (en) * | 2021-09-17 | 2023-01-17 | 东北大学 | Device and method for powder injection dephosphorization and slag blocking at converter steel tapping hole and composite dephosphorization agent |
| CN114561508A (en) * | 2022-03-23 | 2022-05-31 | 马鞍山乌力平冶金技术工作室 | Method and device for deoxidizing melt in converter in tapping process |
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