CN208087660U - A kind of fixed converter tapping hole dual-nozzle configuration - Google Patents
A kind of fixed converter tapping hole dual-nozzle configuration Download PDFInfo
- Publication number
- CN208087660U CN208087660U CN201820510769.1U CN201820510769U CN208087660U CN 208087660 U CN208087660 U CN 208087660U CN 201820510769 U CN201820510769 U CN 201820510769U CN 208087660 U CN208087660 U CN 208087660U
- Authority
- CN
- China
- Prior art keywords
- tapping hole
- nozzle
- converter
- powder
- tapping
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Abstract
The utility model provides a kind of fixed converter tapping hole dual-nozzle configuration, belongs to converter steeling technology field.The structure include two tapping hole nozzles, tapping hole nozzle connection outside powder supply air flow system, powder supply air flow system includes powder feeder unit, powder air-flow conveying rotary joint and powder air-flow distributor, each part mentioned above is connected by furnace body pulverized coal feed pipe, and tapping hole nozzle chamber structure is divided into stable section, expansion segment and diversion section.Tapping hole nozzle is fixed on the furnace body of converter taphole both sides, and two tapping hole nozzles are symmetrical with tapping hole axis, and tapping hole nozzle keeps one with converter, it is not necessary that with converter angle dynamic adjustment nozzle angle, for the pulvis of ejection always towards steel stream, use is more convenient；The special construction of tapping hole nozzle can control powder air-flow and be projected in the form of the powder curtain around steel stream, and package steel stream is well mixed with steel stream, avoid tapping process molten steel secondary oxidation and inhale nitrogen, promote deoxidation effect, reduce nitrogen content, improve steel product quality.
Description
Technical field
The utility model belongs to converter steeling technology field, more particularly to a kind of fixed converter tapping hole twin-jet nozzle knot
Structure.
Background technology
Converter current makes steel the smelting process of generally use top blast supersonic jet and bottom blowing inert gas, but in stove
Stirring is still weaker, especially uses as a servant the later stage in stove, and bottom-blowing of converter hole blocks substantially, only relies on top blowing oxygen, and stirring state is worse in stove,
Cause smelting endpoint molten steel oxygen content higher.
Scrap ratio increased so that converter terminal temperature is inadequate in recent years, and serious after-blow heats up, and leads to molten steel peroxidating
Seriously, terminal molten steel oxygen content is higher, causes the consumption of deoxygenated alloy to increase, inclusion content in melting steel quantity increases, and field trash
Removing is difficult, both increases smelting cost, also endangers steel grade quality.
Currently, will not increase steel inclusion by the method for deoxidation of deoxidier of carbon dust, and it is of low cost, but it is traditional
Method that packed carbon dust direct plunges into ladle easily to the knot molten steel caused by phenomenon and moment reaction that sticks together occurs and turns over packet accident, and carbon
Content is not easy to control, and operation difficulty is larger.
Disclose within 2016 patent " a kind of steel-making tapping process dust online method of deoxidation and system " (patent No.：
ZL201610602812.2), main contents are：In the tapping process of smelting, according to smelting endpoint molten steel parameter, in conjunction with refining
The pre- period parameters of link target molten steel calculate the constituent and each component quality of required deoxidation pulvis and complete to match online
Than determining that tapping process dusts deoxidization technique parameter, directly spraying carrier gas-deoxidation pulvis high speed powder to tapping steel stream using spray gun
Air-flow realizes that tapping process dusts deoxidation online.Method of deoxidation described in it can be applied to converter tapping process, but its institute
The injection apparatus stated uses the defective place of process in converter, so special nozzle arrangements are needed in converter tapping process, it is former
Because as follows：
(1) spray gun described in " a kind of steel-making tapping process dust online method of deoxidation and system " patent and movement clamping machine
Structure is installed under stove, and since converter procedure is complex, slag-screening board is equipped in the space for collecting ashes in a stove both walls below converter, to empty under stove
Between limit very big, can not arrange motion holding mechanism；And converter is the mechanism of 360 degree rotation, easily breaks spray gun device；Furthermore
Tapping process converter body and petticoat pipe easily fall bulk clinker and smash equipment, so not being suitable for converter.
(2) straight pipe type podwer gun outlet described in " a kind of steel-making tapping process dust online method of deoxidation and system " patent
The circular hole outlet of formula is reduced for caliber, the pulvis sprayed directly impacts steel stream, steel stream dispersion phenomenon easily occurs, leads to molten steel two
It is secondary oxidation and suction nitrogen phenomenon it is serious, reduce steel quality in addition nitrogen content it is exceeded cause steel grade drop sentence accident.
(3) spray gun must be according to furnace body described in " a kind of steel-making tapping process dust online method of deoxidation and system " patent
Angle is adjusted by motion holding mechanism into Mobile state, and converter degree is constantly in dynamically to go out from 70 degree to 92 in tapping process
Steel, field condition bring prodigious difficulty to the adjustment of motion holding mechanism, and adjustment lag, the pulvis that nozzle sprays easily occurs
It steel stream cannot be sprayed to, pulvis four is caused under stove to dissipate, influences work sight of tapping, final terminal point determining of tapping is inaccurate or can not tap
Accident.
Utility model content
The utility model is that the current space of solution is limited, equipment is fragile, steel quality caused by nozzle arrangements is low, dynamic
The problems such as can not tapping caused by adjustment lag, provide a kind of fixed converter tapping hole dual-nozzle configuration.
The structure includes two tapping hole nozzles, and tapping hole nozzle end, which is fixed with tapping hole axis with 10-30 degree angle, pacifies
Mounted in the train of dress lower part of converter body, tapping process furnace body shakes, and the pulvis of ejection is always towards steel stream, without coordinating converter dynamic
State adjusts nozzle angle, and use is efficient and convenient, and under the protection of train of dress, tapping hole dusting device is not easy to pound damage by clinker；Tapping
Keep opposing stationary between mouth nozzle and converter body, two tapping hole nozzles are symmetrical with tapping hole axis；Tapping hole nozzle
Switch through the powder supply air flow system of furnace exterior by furnace body pulverized coal feed pipe, powder supply air flow system includes powder feeder unit, the conveying of powder air-flow
Rotary joint and powder air-flow distributor, powder feeder unit provide the mixed uniformly powder air-flow of carrier gas-pulvis；The conveying rotation of powder air-flow connects
Head is by mixed uniformly powder air-flow by being delivered to the furnace body pulverized coal feed pipe being laid on converter body other than converter body；Tapping hole
Nozzle interior is tapping hole nozzle chamber, and tapping hole nozzle chamber is that pipe extends 0-40 degree, tapping hole nozzle chamber obliquely
Outlet end is to surround steel stream and the half arc shaped slits structure towards steel flow center axis, two of the formation of two tapping hole nozzle chambers
Half arc shaped slits structure end and tapping hole outer are concentric circles, each tapping hole nozzle chamber by arrival end to outlet end successively
For stable section, expansion segment and diversion section.
Wherein, stable section is circular straighttube, so that the air velocity that furnace body pulverized coal feed pipe exports is uniformly distributed again herein, surely
The arrival end for determining section is quick-release connector, and quick-release connector is connected with furnace body pulverized coal feed pipe, and the outlet end of stable section connects expansion segment.
Expansion segment is symmetrical with central shaft by pipe, is extended to both sides, and thickness uniformly reduces, spread angle alpha 0-
40 degree, termination thickness 2-5mm, while extension, smooth curved, expands section termination and diversion section is seamless right pipe obliquely
It connects.
Diversion section by two parallel lines around the tapping hole axis two and half arc parallel surfaces that are formed of rotation 5-30 degree with
The deflector composition being vertically fixed between parallel surfaces, two parallel lines distances are the gap thickness that two parallel surfaces are formed
D, D=2-5mm；The length L of two parallel lines is 10-100mm, and straight line is towards tapping hole central axis, deflector and tapping
Mouth central axis angle γ is 10-30 degree, and towards steel flow center, baffle quantity is 2-20 in the direction of deflector,
It is closed by deflector at the both ends of diversion section.
The entrance of tapping hole nozzle is powder air flow inlet, and powder air-flow is generated by powder supply air flow system, powder supply air flow system
The furnace body pulverized coal feed pipes of the entrance and two outlets of powder air-flow distributor and connection powder air-flow distributor are both secured to converter
On furnace body, is rotated together with revolving furnace body, keep opposing stationary between converter body.
The exterior protection structure of tapping hole nozzle is bent fan structure, and exterior protection structure material is abrasion-proof stainless steel.
Powder air-flow distributor powder air-flow will be evenly distributed to two tapping hole nozzles all the way, and tapping hole nozzle generates circulating type
Powder air-flow wraps up steel stream in tapping process, circulating type powder air-flow is made uniformly to be mixed with steel stream.
There are annular groove in tapping hole nozzle and the junction of converter shell steel plate, which is welded on furnace shell steel plate, goes out
Steel mouth nozzle is fixedly mounted in annular groove.
Two tapping hole nozzles are symmetrical with tapping hole axis, and the pulvis of ejection symmetrically rushes at steel stream, prevent steel stream because outer
Power unevenness causes to scatter or change trend.
The tapping hole nozzle of the dual-nozzle configuration is suitable for 30~350 tons of converter.
The tapping hole dusting device of the structure is arbitrary carbon dust, pulverized limestone, agstone and Fluorspar Powder suitable for being blown
One or any two or more mixture, powder granularity are 200 μm~2.0mm, and carrier gas is argon gas or nitrogen.
In converter steelmaking process, which is only blown argon gas as protection gas, in converter tapping process, according to terminal
Molten steel composition and target molten steel composition, the device are blown the pulvis using the carrier gas.
The structure is made of wear-resistant materials such as nitriding stainless steel, quenching stainless steel, abrasion-proof stainless steels.
The above-mentioned technical proposal of the utility model has the beneficial effect that：
In said program, tapping hole nozzle and auxiliary device are fixedly installed in below converter train of dress, are solved below converter
The limited problem in space for collecting ashes in a stove space；Under the protection of train of dress, dusting device is avoided to be fallen by the clinker on furnace body and be smashed；It is fixed
The tapping hole nozzle of angle is adjusted the angle without dynamic, the pulvis of ejection always towards steel stream, avoid nozzle dynamic adjust it is stagnant
After cause powder air-flow cannot with steel stream in conjunction with and cause pulvis four to dissipate and the occurrence of can not tap；Tapping hole nozzle it is special
Structure generates circulating type powder air-flow, and steel stream is wrapped up in tapping process, so that powder air-flow is uniformly mixed with steel stream, prevents tapping
Process molten steel secondary oxidation and suction nitrogen, are applied to converter tapping process, oxygen content in steel reduces 200~600ppm, and nitrogen contains
Amount when normal tapping than reducing 10~30ppm.
Description of the drawings
Fig. 1 is the fixed converter tapping hole dual-nozzle configuration overall schematic of the utility model；
Fig. 2 is the cross section view at the converter tapping process tapping hole of the utility model；
Fig. 3 is the 3-D view of the utility model tapping hole nozzle chamber structure；
Fig. 4 is the two-dimensional top-down view of the utility model tapping hole nozzle chamber structure；
Fig. 5 is the two-dimentional front view of the tapping hole nozzle chamber structure of the utility model.
Wherein：1- powder feeder units；2- powder air-flows convey rotary joint；3- furnace body pulverized coal feed pipes；4- powder air-flow distributors；5-
Tapping hole nozzle；6- tapping holes；7- converters；8- steel streams；9- circulating type powder air-flows；10- tapping hole nozzle chambers；101- stablizes
Section；102- expansion segments；103- diversion sections；11- deflectors；α-extended corner；β-angle of throat；γ-deflector and tapping hole central shaft
Angle；E- straight lines one；F- straight lines two；The gaps D- thickness；L- straight lengths.
Specific implementation mode
In order to make the technical problems, technical solutions and advantages to be solved by the utility model clearer, below in conjunction with attached drawing
And specific embodiment is described in detail.
The utility model provides a kind of fixed converter tapping hole dual-nozzle configuration.
As depicted in figs. 1 and 2, which includes two tapping hole nozzles 5,5 end of tapping hole nozzle and tapping hole axis
It is fixedly mounted on the train of dress lower part of 7 furnace body of converter with 10-30 degree angle, keeps relatively quiet between 7 furnace body of tapping hole nozzle 5 and converter
Only, two tapping hole nozzles 5 are symmetrical with 6 axis of tapping hole；Tapping hole nozzle 5 is connected by furnace body pulverized coal feed pipe 3 outside converter 7
The powder supply air flow system in portion, powder supply air flow system include powder feeder unit 1, powder air-flow conveying rotary joint 2 and powder air-flow distributor
4, as shown in Fig. 3, Fig. 4 and Fig. 5,5 inside of tapping hole nozzle is tapping hole nozzle chamber 10, and tapping hole nozzle chamber 10 is pipe
Extend 0-40 degree obliquely, 10 outlet end of tapping hole nozzle chamber be circular steel stream 8 and towards half arc-shaped slit of 8 central shaft of steel stream
Gap structure, the two and half arc shaped slits structure ends that two tapping hole nozzle chambers 10 are formed are concentric circles with 6 outer of tapping hole,
Each tapping hole nozzle chamber 10 is followed successively by stable section 101, expansion segment 102 and diversion section 103 by arrival end to outlet end.
Wherein, stable section 101 is circular straighttube, and the air velocity that furnace body pulverized coal feed pipe 3 exports is made uniformly to divide again herein
The arrival end of cloth, stable section 101 is quick-release connector, and quick-release connector is connected with furnace body pulverized coal feed pipe 3, the outlet of stable section 101
End connection expansion segment 102.
Expansion segment 102 is symmetrical with central shaft by pipe, is extended to both sides, and thickness uniformly reduces, spread angle alpha is
0-40 degree, termination thickness 2-5mm, 102 pipe of expansion segment is while extension, smooth curved obliquely, 102 terminal of expansion segment
With 103 slitless connection of diversion section.
Diversion section 103 (is received by two parallel lines (two f of one e of straight line and straight line) around tapping hole axis rotation 5-30 degree
Contracting angle beta) the two and half arc parallel surfaces that are formed and the deflector 11 that is vertically fixed between parallel surfaces form, two straight parallels
Linear distance is the gap thickness D, D=2-5mm that two parallel surfaces are formed；Two parallel lines length L are 10-100mm, straight line
Towards 6 central axis of tapping hole, deflector is 10-30 degree, the direction of deflector 11 with tapping hole central axis angle γ
Towards steel flow center, 11 quantity of deflector is 2-20, and the both ends of diversion section are closed by deflector 11.
Converter tapping process dusts whole process as shown in Figure 1, powder feeder unit 1 is uniform by carrier gas argon gas and deoxidation pulvis carbon dust
Mixing, and powder air-flow is exported, rotary joint 2, the conveying rotation of powder air-flow are conveyed by abrasion-proof stainless steel pulverized coal feed pipe powder feeding air-flow
The outlet end of adapter 2 is connected with the stainless steel pipes being fixed on furnace body, the other end of pipeline and entering for powder air-flow distributor 4
Mouthful it is connected, powder air-flow distributor 4, which distributes the pressure such as the flows such as the air-flow of powder all the way from pulverized coal feed pipe to two tapping holes, to be sprayed
Mouth 5, final powder air-flow are sprayed from tapping hole nozzle 5.
Two tapping hole nozzles 5, end are symmetrically and fixedly mounted to converter taphole two with tapping hole axis with 10-30 degree angle
Side, tapping hole nozzle rotate together with revolving furnace body, keep opposing stationary between converter body, are rotated with converter, were tapped
Cheng Wuxu adjusts nozzle angle position, and powder air-flow symmetrically rushes at molten steel stream stock, convenient and efficient.
Tapping hole nozzle 5 includes two nozzles, and two nozzles are symmetrical with tapping hole central axis.The inner cavity of tapping hole nozzle
Structure makes powder air-flow after the entrance of stable section 101, starts extension and angled with steel stream downwards in expansion segment 102, logical
Diversion section 103 is crossed, diversion section selects 10 pieces of deflectors 11, makes the powder airflow direction of extension towards steel stream, towards the center of steel stream 8
It sprays, in a manner of around steel stream, gives birth to deoxygenation with steel flow stock hybrid concurrency, while steel stream being blocked to be connect with surrounding air
It touches, it is suppressed that secondary oxidation of steel and suction nitrogen；
Tapping hole powder spraying system described in the present embodiment is applied to 120 tons of converters, controls each tapping hole nozzle injection carbon
The flow of powder is 24kg/min, and injection argon flow amount is 300Nm3/ min, powder air stream outlet pressure is 2MPa, in converter tapping
After 10s, dusting operation is proceeded by, the time of dusting is 2.5min.
Result of implementation shows：After 120 tons of converters are using the tapping hole dusting device of the utility model, do not influence normally to refine
Steel flow, dusting device is good and sound lossless, the powder air-flow of the ejection directive steel stream in the form of the powder curtain around steel stream always, and oxygen contains in steel
Amount reduce 350ppm, and nitrogen content ratio do not use the utility model when reduce 20ppm.
The above is preferred embodiments of the present invention, it is noted that for the ordinary skill of the art
For personnel, under the premise of not departing from principle described in the utility model, several improvements and modifications can also be made, these improvement
The scope of protection of the utility model is also should be regarded as with retouching.
Claims (9)
1. a kind of fixed converter tapping hole dual-nozzle configuration, it is characterised in that：Including two tapping hole nozzles (5), tapping hole
Nozzle (5) end is fixedly mounted on the train of dress lower part of converter (7) furnace body, tapping hole nozzle with tapping hole axis with 10-30 degree angle
(5) keep opposing stationary between converter (7) furnace body, two tapping hole nozzles (5) are symmetrical with tapping hole (6) axis；Tapping
Mouth nozzle (5) connects the external powder supply air flow system of converter (7) by furnace body pulverized coal feed pipe (3), and powder supply air flow system includes supplying
Powder device (1), powder air-flow conveying rotary joint (2) and powder air-flow distributor (4), internal tapping hole nozzle (5) is that tapping hole sprays
Mouth inner cavity (10), tapping hole nozzle chamber (10) are that pipe extends 0-40 degree, tapping hole nozzle chamber (10) outlet end obliquely
To surround steel stream (8) and towards the half arc shaped slits structure of steel stream (8) central shaft, what two tapping hole nozzle chambers (10) were formed
Two and half arc shaped slits structure ends are concentric circles with tapping hole (6) outer, and each tapping hole nozzle chamber (10) is by arrival end
It is followed successively by stable section (101), expansion segment (102) and diversion section (103) to outlet end.
2. fixed converter tapping hole dual-nozzle configuration according to claim 1, it is characterised in that：The stable section
(101) it is circular straighttube, the air velocity that furnace body pulverized coal feed pipe (3) exports is made to be uniformly distributed again herein, stable section (101)
Arrival end is quick-release connector, and quick-release connector is connected with furnace body pulverized coal feed pipe (3), the outlet end connection expansion of stable section (101)
Section (102).
3. fixed converter tapping hole dual-nozzle configuration according to claim 1, it is characterised in that：The expansion segment
(102) it is symmetrical with central shaft by pipe, is extended to both sides, and thickness uniformly reduces, spread angle alpha is 0-40 degree, terminal
Thickness is 2-5mm, and expansion segment (102) pipe is while extension, smooth curved obliquely, expansion segment (102) terminal and water conservancy diversion
Section (103) slitless connection.
4. fixed converter tapping hole dual-nozzle configuration according to claim 1, it is characterised in that：The diversion section
(103) by two parallel lines the two and half arc parallel surfaces and be vertically fixed on that 5-30 degree is formed are rotated around tapping hole axis
Deflector (11) composition between parallel surfaces, two parallel lines distances are the gap thickness D, D=that two parallel surfaces are formed
2-5mm；Two parallel lines length L are 10-100mm, and straight line is towards tapping hole (6) central axis, deflector (11) and tapping
Mouth central axis angle γ is 10-30 degree, and towards steel flow center, deflector (11) quantity is in the direction of deflector (11)
2-20, the both ends of diversion section are closed by deflector (11).
5. fixed converter tapping hole dual-nozzle configuration according to claim 1, it is characterised in that：The tapping hole nozzle
(5) entrance is powder air flow inlet, and powder air-flow is generated by powder supply air flow system, the powder air-flow distributor (4) of powder supply air flow system
It is both secured to converter (7) furnace body with the furnace body pulverized coal feed pipe (3) of an entrance of connection powder air-flow distributor (4) and two outlets
On, it is rotated together with converter (7) ontology, keeps opposing stationary between converter (7) furnace body.
6. fixed converter tapping hole dual-nozzle configuration according to claim 1, it is characterised in that：The tapping hole nozzle
(5) exterior protection structure is bent fan structure, and exterior protection structure material is abrasion-proof stainless steel.
7. fixed converter tapping hole dual-nozzle configuration according to claim 1, it is characterised in that：The powder distribution of air flow
Device (4) powder air-flow will be evenly distributed to two tapping hole nozzles (5) all the way, and tapping hole nozzle (5) generates circulating type powder air-flow
(9), steel stream (8) is wrapped up in tapping process, and circulating type powder air-flow (9) is made uniformly to be mixed with steel stream (8).
8. fixed converter tapping hole dual-nozzle configuration according to claim 1, it is characterised in that：The tapping hole nozzle
(5) there is annular groove with the junction of converter (7) furnace shell steel plate, which is welded on furnace shell steel plate, and tapping hole nozzle (5) is solid
Dingan County is mounted in annular groove.
9. fixed converter tapping hole dual-nozzle configuration according to claim 1, it is characterised in that：The dual-nozzle configuration
Tapping hole nozzle is suitable for 30~350 tons of converter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820510769.1U CN208087660U (en) | 2018-04-11 | 2018-04-11 | A kind of fixed converter tapping hole dual-nozzle configuration |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820510769.1U CN208087660U (en) | 2018-04-11 | 2018-04-11 | A kind of fixed converter tapping hole dual-nozzle configuration |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208087660U true CN208087660U (en) | 2018-11-13 |
Family
ID=64055044
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820510769.1U Expired - Fee Related CN208087660U (en) | 2018-04-11 | 2018-04-11 | A kind of fixed converter tapping hole dual-nozzle configuration |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208087660U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108251596A (en) * | 2018-04-11 | 2018-07-06 | 北京科技大学 | A kind of fixed converter tapping hole dual-nozzle configuration |
| CN109576434A (en) * | 2019-01-28 | 2019-04-05 | 山东钢铁股份有限公司 | Powder-spraying metallurgical control method and equipment for converter tapping |
-
2018
- 2018-04-11 CN CN201820510769.1U patent/CN208087660U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108251596A (en) * | 2018-04-11 | 2018-07-06 | 北京科技大学 | A kind of fixed converter tapping hole dual-nozzle configuration |
| CN109576434A (en) * | 2019-01-28 | 2019-04-05 | 山东钢铁股份有限公司 | Powder-spraying metallurgical control method and equipment for converter tapping |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP2796569B1 (en) | Converter steelmaking method | |
| CN102575306B (en) | Top lance for refining and method for refining molten iron using same | |
| CN208087660U (en) | A kind of fixed converter tapping hole dual-nozzle configuration | |
| CN110760639A (en) | System and method for steelmaking by spraying limestone powder to bottom of converter | |
| CN108251596A (en) | A kind of fixed converter tapping hole dual-nozzle configuration | |
| CN104357615B (en) | A kind of converter winding-up dedusting ash dephosphorization method for molten iron | |
| CN101319787A (en) | Coal powder lance for blast furnace | |
| CA1211630A (en) | Lance structure and oxygen-blowing process for top- blown converters | |
| CN112226576B (en) | Device and method for carbon spraying and deoxidizing by utilizing slag blocking system | |
| JP2006348331A (en) | Top-blowing lance for refining molten metal, and blowing method for molten metal | |
| JP2006336033A (en) | Blowing method in converter and top-blown lance for blowing in converter | |
| JP5544807B2 (en) | Top blowing lance for refining and converter refining method | |
| CN105441624B (en) | Gun head structure and method for regulating converter top blown oxygen flow by double-path oxygen flow | |
| CN1101078A (en) | A method for operating a multimedia tuyere and the tuyere system | |
| CN201250239Y (en) | Blast furnace coal injection gun | |
| US9400138B2 (en) | Melting reduction assembly and method for operating a melting reduction assembly | |
| JP6721129B2 (en) | Top blowing lance for converter blowing and refining method of hot metal | |
| CN207699534U (en) | A kind of burner arrangement of the pre- anti-bias burning of uniform discharge | |
| CN112316621A (en) | Aerosol generating device | |
| CN112680568A (en) | LF stove is concise blows slag face deoxidation device | |
| CN205313599U (en) | Rifle head structure of converter top blowing oxygen flow is adjusted to double - circuit oxygen flow | |
| CN212270150U (en) | Low thermal stress air-cooled desulfurization spray gun | |
| CN216378348U (en) | Thermal spraying equipment | |
| US3304173A (en) | Method of adding solids and oxygen to an open hearth furnace | |
| CN109694932A (en) | The pre- dephosphorization technology directly supplied oxygen in molten iron |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20181113 Termination date: 20210411 |