CN208071732U - A kind of thermometric spray gun being installed on converter bottom - Google Patents
A kind of thermometric spray gun being installed on converter bottom Download PDFInfo
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- CN208071732U CN208071732U CN201820293407.1U CN201820293407U CN208071732U CN 208071732 U CN208071732 U CN 208071732U CN 201820293407 U CN201820293407 U CN 201820293407U CN 208071732 U CN208071732 U CN 208071732U
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Abstract
The utility model is related to converter steeling technology fields, provide a kind of continuous temperature measurement spray gun being installed on converter bottom；Thermometric spray gun is installed on converter bottom, including thermometric channel, anti-blocking channel, cooling duct and sensor install module, contains O by injection2Thermometric gas, temperature profile signal transmission passage is directly established between molten steel and temperature transducer, without arranging flue gas and slag blanket, can stablize in converter steelmaking process, accurately, continuously measure molten steel temperature；While gas composition and supply gas pressure by adjusting each channel of thermometric spray gun stage by stage, control the coverage area and cladding thickness of mushroom head and slag blanket, under the premise of maintaining thermometric channel to continue unobstructed, thermometric spray gun end and its periphery is made well to be covered, realizes the safety long-life of thermometric spray gun.The utility model is suitable for conventional top and bottom combined blown converter and pushes up BOTTOM OXYGEN converter, and within ranging from ± 15 DEG C of temperature measurement accuracy, the service life of thermometric spray gun is synchronous with furnace life.
Description
Technical field
The utility model is related to converter steeling technology field, more particularly to a kind of thermometric spray gun being installed on converter bottom.
Background technology
Currently, the requirement to steel and iron industry intelligence manufacture, green production is increasingly urgent to, converter " key steel-making " becomes main
Research and development direction.However, in order to realize converter " key steel-making ", need to carry out the key index of converter steelmaking process
It monitors in real time or predicts, such as molten steel temperature, molten steel component etc., wherein continuous monitoring molten steel temperature is to optimizing converter slag-making, taking off
Phosphorus and terminal point control all have significance.Current convertor steelmaking process still cannot achieve the continuous monitoring to molten steel temperature,
Molten steel temperature can only be measured by sublance smelting the later stage, or by the artificial thermometric of grate, instruct to smelt latter stage with this temperature
Blowing, this method increase production cost and labor intensity, due to being to survey, rather than continuously measure molten steel temperature, the party
Method also can not accurately instruct terminal point control, and the hit rate for often resulting in the double hits of molten steel temperature, carbon content is not high.
In recent years, developing into for infrared temperature-test technology realized that the continuous temperature measurement of convertor steelmaking process provided technical support.
Patent（ZL 201510958681.7）Disclose temp measuring system and the thermometric side of a kind of electric-arc furnace steelmaking on-line measurement molten steel temperature
Infrared temperature probe is integrated in electric arc furnaces wall lance by method, this method, and the supersonic airstream generated using oxygen rifle is blown open
Foam slag blanket sets up stable molten steel temperature characteristic signal transmission channel between molten steel and sensor, realizes electric arc furnaces refining
The continuously or discontinuously on-line measurement of steel process molten steel in the stove temperature.However, for converter, due to the type of furnace and offering oxygen way
Greatest differences do not have the condition of installation wall lance, and top blow oxygen lance length is more than 10 meters used in converter, and the spray of end
Hole is tilted with certain angle, can not also provide channel and the window of temperature signal transmission；Patent（ZL 201510958681.7）
Disclosed in wall lance be water-cooling structure, and water-cooling structure spray gun can be only installed at the position in molten steel face or more, can not install
In molten steel face furnace wall below or furnace bottom；Meanwhile the patent（ZL 201510958681.7）In disclose thermometric gas be N2、
CO2Or Ar, but N2、CO2Or Ar is blown to causing cooling effect to molten steel surface when molten steel surface so that temperature transducers
The temperature that device measures is less than molten steel actual temperature.Therefore, the patent（ZL 201510958681.7）Disclosed temp measuring system and survey
Warm method is not particularly suited for the continuous temperature measurement of convertor steelmaking process.
The mode of current converter generally use top bottom blowing, i.e. the top high-strength oxygen into stove by oxygen rifle,
Bottom installation bottom blowing element agitation molten pool can keep bottom blowing element by rational furnace bottom maintenance service and slag splashing
Full stove labour is unobstructed.In conjunction with converter profile, injection method and smelting requirements, in converter bottom, installation thermometric spray gun is feasible, nothing
Flue gas and slag blanket need to be arranged, temperature signal transmission channel can be directly established between molten steel and temperature transducer, but there are following
Problem：（1）Installation site can not use water-cooling structure, how ensure that thermometric spray gun is not burnt by high-temperature molten steel below molten steel face
Damage；（2）If simply cooling gas is used to carry out cooling protection to thermometric spray gun, mushroom head can be formed in lance outlet, by
Gradually block thermometric channel；（3）Due to N2、CO2Or Ar has cooling effect to molten steel, how to select suitable thermometric gas, measures standard
True molten steel temperature.（4）Since thermometric spray gun is mounted on converter bottom, there is high-temperature molten steel covering in top, once gas supply interrupts, steel
Liquid will pour in down a chimney to spray gun, block even scaling loss thermometric spray gun.
Utility model content
The purpose of this utility model is exactly to have overcome the deficiencies of the prior art and provide a kind of thermometric being installed on converter bottom
Spray gun solves to cause furnace bottom to corrode, because bottom blowing forms mushroom because of bottom blown gas on the basis of providing temperature signal transmission channel
Head causes thermometric channel blockage and N2、CO2Or the critical issue that Ar causes thermometric inaccurate as thermometric gas.
The utility model thermometric spray gun contains O by injection2Thermometric gas, between molten steel and temperature transducer directly
Temperature profile signal transmission passage is established, without arranging flue gas and slag blanket, by the gas for adjusting each channel of thermometric spray gun stage by stage
Body forms and supply gas pressure, controls the coverage area and cladding thickness of mushroom head and slag blanket, unobstructed maintaining thermometric channel to continue
Under the premise of, realize the safety long-life of thermometric spray gun, by the way that contingency gas sources are arranged, cooperation grate operation is avoided because gas supply is unstable
And molten steel is caused to pour in down a chimney to spray gun.
The specific technical solution of the utility model is as follows：
A kind of thermometric spray gun being installed on converter bottom, including thermometric channel, anti-blocking channel, cooling duct and sensor peace
Die-filling piece；The side wall of the thermometric spray gun is equipped with thermometric gas access, anti-blocking gas access and cooling gas inlet；The sensing
Device installation module is arranged in the lower end in the thermometric channel, and the sensor installation module passes through resistance to height with the thermometric channel
Warm translucent element sealing isolation.
Further, the sensor is installed and is provided with infrared temperature probe in module, in the infrared temperature probe
Heart line and the center line in the thermometric channel are coaxial.
Further, the sensor installation module is process by refractory metal material, inside filling bradyseism material,
High-temperaure coating is smeared in outer surface, avoids probe-shift or damage caused by furnace body fascinates with high temperature under stove.
Further, the thermometric channel, anti-blocking channel and cooling duct of the thermometric spray gun are coaxially arranged, the survey
Warm channel, anti-blocking channel, the outlet end of cooling duct are concordant with furnace bottom.
Further, the air supply system of the thermometric spray gun includes air supply system and air regulating device, the air source system
System includes conventional air source and contingency gas sources, and the pressure of the contingency gas sources is maintained at 1.5MPa or more, and the contingency gas sources can be solely
It is vertical to meet thermometric spray gun gas supply 3min or more.
Further, in order to which under the premise of providing stabilization signal transmission channel, the gas flow of reduction thermometric spray gun subtracts
Gently to the erosion of furnace bottom, the latus rectum in the thermometric channel is 10 ~ 30mm.
Further, since converter bottom dust is big, temperature is high, and converter needs to realize 360 ° of rotations, temperature transducer
It can not be communicated with host computer by cable and optical fiber, therefore the temperature transducer of sensor installation module is using wireless transmission
Mode and host computer communicate.
Further, top and bottom combined blown converter and top BOTTOM OXYGEN converter of the thermometric spray gun suitable for 50 ~ 350 tons.
A kind of application method of above-mentioned thermometric spray gun, the thermometric spray gun thermometric channel, anti-blocking channel, cooling duct
Gas forms and supply gas pressure uses control by stages, is as follows：
In the stage of bessemerizing：Thermometric channel is blown thermometric gas, and the thermometric gas is O2-CO2Gaseous mixture or O2-N2-
Ar gaseous mixtures, supply gas pressure are 0.3 ~ 0.8MPa, the O2-CO2O in gaseous mixture2Ratio is 30% ~ 50%, the O2-N2- Ar is mixed
Close O in gas2Ratio is 20% ~ 40%, utilizes O2The exothermic effects reacted with molten steel offset N2、CO2, Ar makees the cooling of molten steel
With so that the practical molten steel temperature in the molten steel temperature and molten bath right over thermometric channel is consistent, molten steel temperature feature letter
Translucent element number continually by thermometric channel transfer, and across thermometric channel and sensor installation module, into survey
Temperature probe, obtains molten steel temperature, realizes continuous, accurate molten steel thermometric；Anti-blocking channel is blown O2, supply gas pressure be 0.4 ~
1.0MPa utilizes O2The exothermic effects reacted with molten steel avoid thermometric channel end from generating mushroom head, and thermometric channel is caused to reduce
Even block；Cooling duct is blown CH4、N2, Ar or its mixed air, supply gas pressure is 0.5 ~ 1.2MPa, passes through splitting for cooling gas
Heat of desorption or physics heat absorption form mushroom head covering in cooling duct end and its outside, inhibit high-temperature molten steel to furnace bottom and survey
Warm spray gun washes away erosion and scaling loss；
In the splashing slag in converter stage：Thermometric channel blows air, supply gas pressure are 0.5 ~ 1.0MPa (containing few in air
The oxygen of amount), using high-voltage high-speed air draught, avoids clinker from entering thermometric channel or be covered in thermometric channel end；It is anti-blocking
Channel blows air, supply gas pressure are 0.5 ~ 1.0MPa (in air contain a small amount of oxygen), using high-voltage high-speed air draught,
It avoids clinker from entering anti-blocking channel or is covered in anti-blocking channel end；Cooling duct is blown N2, supply gas pressure is 0.6 ~ 1.2MPa,
Slag blanket covering is formed on the basis of cooling duct end and its outside mushroom head cover, and protects thermometric spray gun, meanwhile, pass through height
High-speed flow is pressed, avoids the coating of cooling duct end is too thick cooling duct is caused to block；
In other stages of converter smelting：Both without liquid slag in stove, also without molten steel, therefore it is thermometric channel, anti-blocking
Channel and cooling duct are blown N2, the supply gas pressure in thermometric channel and anti-blocking channel is 0.3 ~ 0.5MPa, cooling duct due to
End is covered by mushroom head and slag blanket, and supply gas pressure is 0.4 ~ 0.8MPa.
Further, the air supply system of the thermometric spray gun includes air supply system and air regulating device, the air source system
System includes conventional air source and contingency gas sources, and the pressure of the contingency gas sources is maintained at 1.5MPa or more, and the contingency gas sources can be solely
It is vertical to meet thermometric spray gun gas supply 3min or more；When the pressure of the conventional air source is less than 1.2MPa, control system provides report
Alert signal is immediately switched to contingency gas sources gas supply, top blow oxygen lance is proposed converter, and tilting converter is exposed to thermometric spray gun, prevents
Only molten steel is caused to pour in down a chimney to thermometric channel because of bleed pressure deficiency.
The beneficial effects of the utility model are：
（1）Using a kind of continuous temperature measurement spray gun being installed on converter bottom and its application method of the utility model, solve
The problem of continuous molten steel thermometric can not be realized caused by being limited by converter profile, offering oxygen way in steel ullage；
（2）Using a kind of continuous temperature measurement spray gun being installed on converter bottom and its application method of the utility model, converter
Bottom can directly establish temperature profile signal by bottom blowing thermometric gas without liquid slag between molten steel and temperature transducer
Transmission channel, without the interference of flue gas and clinker, can get more stable and more accurate thermometric without arranging flue gas and clinker
Data；
（3）Using a kind of continuous temperature measurement spray gun being installed on converter bottom and its application method of the utility model, pass through
Thermometric spray gun injection gas temperature signal transmission channel can be provided, also can agitation molten pool, improve the dynamic conditions of converter；
（4）The utility model has obtained the composition of thermometric gas by a large amount of creative Experimental Researchs, offsets CO2、N2、
Cooling effects of the Ar to molten steel obtains more accurate molten steel temperature measurement result；Within ranging from ± 15 DEG C of temperature measurement accuracy；
（5）Using a kind of continuous temperature measurement spray gun being installed on converter bottom and its application method of the utility model, pass through
In each stage of converter smelting, the gas in dynamic regulation thermometric channel, anti-blocking channel and cooling duct forms, control mushroom head and
The coverage area and cladding thickness of slag blanket, under the premise of thermometric channel is uncovered so that cooling duct end and its periphery
It is well covered, that realizes thermometric channel continues unobstructed and thermometric spray gun safety long-life.
（6）Using a kind of continuous temperature measurement spray gun being installed on converter bottom and its application method of the utility model, pass through
Contingency gas sources are set, cooperation grate operation, avoid because supply it is unstable due to cause molten steel to pour in down a chimney to spray gun, protection thermometric spray gun and
Temperature probe.
Description of the drawings
Fig. 1 show a kind of thermometric spray gun structure schematic diagram being installed on converter bottom of the utility model embodiment.
In figure：1, converter；2, molten steel；3, clinker；4, top blow oxygen lance；5, thermometric spray gun；5-1, thermometric channel；It is 5-2, anti-blocking
Channel；5-3, cooling duct；5-4, sensor install module；5-5, thermometric gas access；5-6, anti-blocking gas access；It is 5-7, cold
But gas access；5-8, translucent element；5-9, infrared temperature probe.
Specific implementation mode
The utility model specific embodiment is described in detail below in conjunction with specific attached drawing.It should be noted that following implementations
Example described in technical characteristic or technical characteristic combination be not construed as it is isolated, they can be combined with each other from
And reach superior technique effect.In the attached drawing of following embodiments, the identical label that each attached drawing occurs represents identical spy
Sign or component, can be applied in different embodiments.
As shown in Figure 1, a kind of thermometric spray gun being installed on converter bottom of the utility model embodiment, including thermometric channel 5-
1, anti-blocking channel 5-2, cooling duct 5-3 and sensor installation module 5-4；The side wall of the thermometric spray gun enters equipped with thermometric gas
Mouth 5-5, anti-blocking gas access 5-6 and cooling gas inlet 5-7；The sensor installation module 5-4 settings are logical in the thermometric
The lower end of road 5-1, the sensor installation module 5-4 and thermometric channel 5-1 are sealed by high temperature resistant translucent element 5-8
Isolation.It is provided with infrared temperature probe 5-9, the center line of the infrared temperature probe 5-9 in the sensor installation module 5-4
It is coaxial with the center line of the thermometric channel 5-1.Preferably, the sensor installation module 5-4 is added by refractory metal material
Work forms, and inside filling bradyseism material, outer surface smears high-temperaure coating, avoids popping one's head in caused by furnace body fascinates with high temperature under stove
Displacement or damage.Thermometric channel 5-1, anti-blocking channel 5-2 and the cooling duct 5-3 of the thermometric spray gun are from center coaxial cloth outward
It sets, the thermometric channel 5-1, anti-blocking channel 5-2, the outlet end of cooling duct 5-3 are concordant with furnace bottom.
Embodiment 1
The utility model embodiment is applied on 120 tons of top and bottom combined blown converters, and the furnace bottom of the converter installs 1 this practicality newly
The thermometric channel 5-1 latus rectums of the capillary type bottom blowing element of the thermometric spray gun of type and 4 routines, thermometric spray gun are 15mm, anti-blocking
The slit width of channel 5-2 is 2mm, and the slit width of cooling duct 5-3 is 1mm.
In the stage of bessemerizing, thermometric channel 5-1 is blown thermometric gas, and thermometric gas is O2-N2- Ar gaseous mixtures, in order to keep away
It is exceeded to exempt from terminal nitrogen content in liquid steel, it is O to bessemerize early period and mid-term2-N2Gaseous mixture, blowing later stage are O2- Ar gaseous mixtures supply
Atmospheric pressure is 0.3 ~ 0.5MPa, O in thermometric gas2Ratio is 30%；Anti-blocking channel 5-2 is blown O2, supply gas pressure be 0.4 ~
0.6MPa utilizes O2The very exothermic effect reacted with molten steel, avoids the thermometric channel ends 5-1 from generating mushroom head；Cooling duct
5-3 is blown CH4, supply gas pressure is 0.5 ~ 0.7MPa, passes through CH4Cracking heat absorption, in the cooling duct ends 5-3 and its outside shape
It is covered at mushroom head, high-temperature molten steel is inhibited to wash away erosion and scaling loss to furnace bottom and thermometric spray gun.
In the splashing slag in converter stage, thermometric channel 5-1 blows airs, supply gas pressure is 0.5 ~ 0.6MPa, is contained in air
There is a small amount of oxygen, using high-voltage high-speed air draught, avoids clinker from entering thermometric channel 5-1 or be covered in thermometric channel 5-1
End；Anti-blocking channel 5-2 blows airs, supply gas pressure are 0.5 ~ 0.6MPa, contain a small amount of oxygen in air, utilize high pressure height
Fast air draught avoids clinker from entering anti-blocking channel 5-2 or is covered in the ends anti-blocking channel 5-2；Cooling duct 5-3 is blown N2,
Supply gas pressure is 0.6 ~ 0.8MPa, and slag blanket covering is formed on the basis of the cooling duct ends 5-3 and its outside mushroom head cover,
Thermometric spray gun is protected, meanwhile, by high-voltage high-speed airflow, avoid the coating of the cooling duct ends 5-3 is too thick from leading to cooling lead to
Road 5-3 is blocked.
In other stages of converter smelting, both without liquid slag in stove, also without molten steel, therefore it is thermometric channel 5-1, anti-
The supply gas pressure that stifled channel 5-2 and cooling duct 5-3 is blown N2, thermometric channel 5-1 and anti-blocking channel 5-2 is 0.3 ~
Since end is by mushroom head and slag blanket covering, supply gas pressure is 0.5 ~ 0.6MPa by 0.4MPa, cooling duct 5-3.
After the converter is using the thermometric spray gun and method of the utility model, continuous survey of the smelting process to molten steel temperature is realized
The temperature measurement accuracy of amount, thermometric spray gun is ± 13 DEG C；Thermometric spray gun realizes that full stove labour is unimpeded, and furnace life is without significant change.
Embodiment 2
The utility model, which is applied, to be pushed up at 300 tons in BOTTOM OXYGEN converter, and the furnace bottom of the converter installs the survey of 1 the utility model
The thermometric channel latus rectum of warm spray gun and 7 Double-layer sleeve-type spray guns, thermometric spray gun is 25mm, and the slit width in anti-blocking channel is 2mm, cold
But the slit width in channel is 1mm, the central tube injecting oxygen and pulvis of Double-layer sleeve-type spray gun, circumferential weld injection cooling gas.
In the stage of bessemerizing, thermometric channel 5-1 is blown thermometric gas, and thermometric gas is O2-CO2Gaseous mixture, supply gas pressure
For 0.5 ~ 0.6MPa, O in thermometric gas2Ratio is 40%；Anti-blocking channel 5-2 is blown O2, supply gas pressure is 0.6 ~ 0.8MPa, is utilized
O2The very exothermic effect reacted with molten steel, avoids the thermometric channel ends 5-1 from generating mushroom head；Cooling duct 5-3 is blown CH4, supply
Atmospheric pressure is 0.7 ~ 1.0MPa, passes through CH4Cracking heat absorption, form mushroom head covering in the cooling duct ends 5-3 and its outside,
High-temperature molten steel is inhibited to wash away erosion and scaling loss to furnace bottom and thermometric spray gun.
In the splashing slag in converter stage, thermometric channel 5-1 blows airs, supply gas pressure is 0.5 ~ 0.6MPa, is contained in air
There is a small amount of oxygen, using high-voltage high-speed air draught, avoids clinker from entering thermometric channel 5-1 or be covered in thermometric channel 5-1
End；Anti-blocking channel 5-2 blows airs, supply gas pressure are 0.5 ~ 0.6MPa, contain a small amount of oxygen in air, utilize high pressure height
Fast air draught avoids clinker from entering anti-blocking channel 5-2 or is covered in the ends anti-blocking channel 5-2；Cooling duct 5-3 is blown N2,
Supply gas pressure is 0.7 ~ 1.0MPa, and slag blanket covering is formed on the basis of the cooling duct ends 5-3 and its outside mushroom head cover,
Thermometric spray gun is protected, meanwhile, by high-voltage high-speed airflow, avoid the coating of the cooling duct ends 5-3 is too thick from leading to cooling lead to
Road 5-3 is blocked.
In other stages of converter smelting, both without liquid slag in stove, also without molten steel, therefore it is thermometric channel 5-1, anti-
Stifled channel 5-2 and cooling duct 5-3 is blown N2, the supply gas pressure of thermometric channel 5-1 and anti-blocking channel 5-2 is 0.3 ~
Since end is by mushroom head and slag blanket covering, supply gas pressure is 0.5 ~ 0.6MPa by 0.4MPa, cooling duct 5-3.
After the converter is using the thermometric spray gun and method of the utility model, continuous survey of the smelting process to molten steel temperature is realized
The temperature measurement accuracy of amount, thermometric spray gun is ± 15 DEG C；Thermometric spray gun realizes that full stove labour is unimpeded, and furnace life is without significant change.
Although having been presented for several embodiments of the utility model herein, those skilled in the art should manage
Solution, in the case where not departing from the spirit of the present invention, can be changed the embodiments herein.Above-described embodiment only shows
Example property, it should not be using the embodiments herein as the restriction of the utility model interest field.
Claims (7)
1. a kind of thermometric spray gun being installed on converter bottom, which is characterized in that including thermometric channel, anti-blocking channel, cooling duct
Module is installed with sensor；The side wall of the thermometric spray gun enters equipped with thermometric gas access, anti-blocking gas access and cooling gas
Mouthful；The sensor installation module is arranged in the lower end in the thermometric channel, the sensor installation module and the thermometric
Channel is sealed by high temperature resistant translucent element to be completely cut off.
2. thermometric spray gun as described in claim 1, which is characterized in that be provided with infrared measurement of temperature in the sensor installation module
Probe, the center line of the infrared temperature probe and the center line in the thermometric channel are coaxial.
3. thermometric spray gun as described in claim 1, which is characterized in that the sensor installs module by refractory metal material
It is process, inside filling bradyseism material, high-temperaure coating is smeared in outer surface.
4. thermometric spray gun as described in claim 1, which is characterized in that the thermometric channel of the thermometric spray gun, anti-blocking channel and
Cooling duct is coaxially arranged, and the thermometric channel, anti-blocking channel, the outlet end of cooling duct are concordant with furnace bottom.
5. thermometric spray gun as described in claim 1, which is characterized in that the air supply system of the thermometric spray gun includes air supply system
And air regulating device, the air supply system include conventional air source and contingency gas sources.
6. thermometric spray gun as described in claim 1, which is characterized in that the latus rectum in the thermometric channel is 10~30mm.
7. thermometric spray gun as described in claim 1, which is characterized in that the temperature transducer of the sensor installation module uses
The mode of wireless transmission is communicated with host computer.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820293407.1U CN208071732U (en) | 2018-03-02 | 2018-03-02 | A kind of thermometric spray gun being installed on converter bottom |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820293407.1U CN208071732U (en) | 2018-03-02 | 2018-03-02 | A kind of thermometric spray gun being installed on converter bottom |
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| CN208071732U true CN208071732U (en) | 2018-11-09 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108165700A (en) * | 2018-03-02 | 2018-06-15 | 北京科技大学 | A kind of thermometric spray gun for being installed on converter bottom and application method |
| CN111593160A (en) * | 2020-05-25 | 2020-08-28 | 河钢乐亭钢铁有限公司 | Converter oxygen jet flow dynamic adjustment method |
-
2018
- 2018-03-02 CN CN201820293407.1U patent/CN208071732U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108165700A (en) * | 2018-03-02 | 2018-06-15 | 北京科技大学 | A kind of thermometric spray gun for being installed on converter bottom and application method |
| CN108165700B (en) * | 2018-03-02 | 2023-06-02 | 北京科技大学 | Temperature measuring spray gun installed at bottom of converter and application method |
| CN111593160A (en) * | 2020-05-25 | 2020-08-28 | 河钢乐亭钢铁有限公司 | Converter oxygen jet flow dynamic adjustment method |
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