CN107267703A - The dephosphorization of molten iron device and dephosphorization method of a kind of rotary blowing pulvis - Google Patents
The dephosphorization of molten iron device and dephosphorization method of a kind of rotary blowing pulvis Download PDFInfo
- Publication number
- CN107267703A CN107267703A CN201710269742.8A CN201710269742A CN107267703A CN 107267703 A CN107267703 A CN 107267703A CN 201710269742 A CN201710269742 A CN 201710269742A CN 107267703 A CN107267703 A CN 107267703A
- Authority
- CN
- China
- Prior art keywords
- dephosphorization
- molten iron
- podwer gun
- injection system
- lowering
- 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.)
- Pending
Links
Classifications
-
- 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
- C21C1/00—Refining of pig-iron; Cast iron
- C21C1/02—Dephosphorising or desulfurising
-
- 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
- C21C7/064—Dephosphorising; Desulfurising
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Abstract
The present invention discloses the dephosphorization of molten iron device and dephosphorization method of a kind of rotary blowing pulvis, pass through rotating injecting powder dephosphorization of molten iron device, it can realize that multiple spot Dephosphorization is handled using inverted T shaped podwer gun, improve the dynamic conditions of dephosphorisation reaction, effectively lift dephosphorization rate, accelerate dephosphorisation reaction speed, shorten the dephosphorization treatment time, invest small；Feeding system, injection system, which can be realized, to be automatically controlled and on-line control；Effectively prevent podwer gun from blocking, and podwer gun self-skimming can be realized.
Description
Technical field
The present invention relates to field of steel metallurgy, the dephosphorization of molten iron device of more particularly to a kind of rotary blowing pulvis and dephosphorization side
Method.
Background technology
Phosphorus is the harmful element in most steel grades, easily in cyrystal boundary segregation, causes the black brittleness and Temper brittleness of steel
Property.In recent years, with the rapid development of science and technology, requirement of the user to steel quality is improved constantly.For example, being used for low temperature
Steel, marine steel, anti-hydrogen induced cracking steel and part slab steel, in addition to the sulfur content for requiring extremely low, are also required that in steel
Phosphorus content<0.01% or 0.005%.
In addition, in order to reduce the production cost of oxygen coverter steel and carry out less-slag operation, also requiring that molten iron phosphorus content<
0.015%.Therefore, many metallargists are directed to studying the pretreatment dephosphorizing problem of molten iron since the eighties, develop each
Plant processing method.
The pre- dephosphorization treatment of molten iron can be divided into dephosphorization under oxidizing atmosphere and dephosphorization under reducing atmosphere, at present, and each steel mill generally uses dephosphorization under oxidizing atmosphere
Technique.Dephosphorization method is divided into SARP methods, hot-metal bottle method, ORP methods, converter process and NRP methods etc. according to Dephosphorising agent difference.Conventional two
Class：A kind of is to carry out dephosphorization in the ladle or torpedo car for containing molten iron；Another is to carry out dephosphorization of molten iron in converter in advance to locate
Reason.Both approaches are industrially applied.
Application number 201310508854.6 discloses a kind of entitled " a kind of dephosphorization method for molten iron " it is characterized in that the present invention
There is provided a kind of dephosphorization method for molten iron, mainly for mammoth conveter dephosphorization of molten iron.Carried out using following steps：1. by oxygen rifle from
Top supplies oxygen to molten iron surface, and oxygen supply intensity is in 0.8-1.1Nm3Change in the range of/t/min；2. by being set above converter
The hopper put adds based on the slag material of lime, light dolomite, ore into molten iron and carries out clinker two after slag making, slagging
First basicity (CaO/SiO2) it is 1.6-2.0；3. it is strong to stirring gas, supply is supplied inside molten steel by converter bottom gas supply system
Degree is in 0.25-0.40Nm3/t/min.The present invention is low using low alkalinity slag melting, and the low easy slagging of molten iron temperature passes through larger ore deposit
Stone consumption promotes slagging and oxygen supply, extends duration of blast using the blowing of low oxygen supply intensity, big bottom blowing intensity stirring realize slag,
Being sufficiently mixed between gold, realizes dephosphorization, and good with dephosphorization effect, lime consumption is few, and dephosphorization is few with supplementary product onsumption, and slag discharge is few
Advantage.But this method dephosphorization rate is low, while scrap build investment is huge.
The content of the invention
In order to overcome drawbacks described above, the present invention, which provides one kind, can realize that temperature drop is small, processing time is short；Dephosphorization rate is high, set
Standby transformation and the dephosphorization of molten iron device and dephosphorization method for investing small rotary blowing pulvis.
The present invention seeks to what is realized by following technical scheme：
A kind of dephosphorization of molten iron device of rotary blowing pulvis, it is characterised in that：Including lowering or hoisting gear, anti-splash device, confession
Material system, injection system, rotating device, podwer gun；Described podwer gun is inverted T-shaped hollow tube, and tube head two ends carry spray orifice, outside
Wrap up refractory material in portion；Described rotating device includes swivel joint and the internal motor for carrying hollow shaft, and swivel joint is overall
For three-port structure, internal bearings are connected with the hollow shaft upper end in motor, swivel joint horizontal direction respectively with pipeline communication, it is empty
Heart axle lower end is connected by flange with podwer gun upper end；The anti-splash device is up-small and down-big cylinder, and rotating device is located at
In anti-splash device, described pipeline respectively with feeding system and injection system is connected through anti-splash device and by metal hose
Logical, anti-splash device lower surface covers one layer of refractory material；Anti-splash device is connected with lowering or hoisting gear, anti-splash device, rotation
Device, podwer gun can be moved with lowering or hoisting gear oscilaltion；Described lowering or hoisting gear includes support, lift and support arm,
Support is connected with anti-splash device, and support is connected by support arm with lift；In flux and injection system in feeding system
Carrier gas podwer gun is blown into by rotating device, realize rotating injecting powder.
The 110~130% of a diameter of tank mouth external diameter of anti-splash device lower surface.
The horizontal diameter of steel tube of the podwer gun is the 2/3~4/5 of longitudinal diameter of steel tube；Refractory material outside length is to dust
The 1/2~2/3 of rifle total length.
A kind of dephosphorization method for molten iron of the rotary blowing pulvis of rotary blowing pulvis, it is characterised in that comprise the following steps：
1) dephosphorization of molten iron processing will be carried out after blast furnace casting；
2) start injection system, be that more than 99.9%, 0.4~0.6MPa of pressure nitrogen or inert gas pass through by purity
Podwer gun is blown into molten iron, drops to podwer gun away from molten iron 400~500mm of pot bottom while opening lowering or hoisting gear, works as podwer gun
Rotating device is opened when reaching working position, rotary speed is 10~30 revs/min, while starting feeding system will need what is added
Dephosphorising agent total amount is blown into molten iron by podwer gun, and its alloy particle diameter is 0.09~0.125mm, adjusts injection system by pressure
0.8~0.9MP of operating pressure is adjusted to until dephosphorization is completed；
3) after the completion of dephosphorization of molten iron, close feeding system and start lowering or hoisting gear by podwer gun be promoted to molten iron level with
On, adjustment injection system adjusts pressure to 0.9~1.1MP, and rotary speed is adjusted to 30~50 revs/min by adjustment rotating device
Clock, 1~2min slagging-off and anti-blocking processing are carried out to podwer gun；
4) molten iron drossing processing and subsequent operations are carried out.
The mass ratio of waste material containing iron oxide and lime is 40~60 in described Dephosphorising agent:60~40, wherein containing oxidation
Calcium oxide mass percentage content >=90% in iron waste material iron oxide mass percentage content >=85%, lime.
Beneficial effects of the present invention：1. the present invention is dusted dephosphorization of molten iron device by using Special rotary, inverted T shaped spray is utilized
Powder rifle can realize that multiple spot Dephosphorization is handled, and improve the dynamic conditions of dephosphorisation reaction, effectively lift dephosphorization rate.2. the present invention
Dephosphorization of molten iron is carried out using the method for rotary blowing Dephosphorising agent, dephosphorisation reaction speed can be accelerated, shorten the dephosphorization treatment time.3.
Invention can be achieved in original desulfurizing iron station progress part transformation, so its scrap build and investment are small.4. the present invention
Its feeding system, injection system, which can be realized, to be automatically controlled and on-line control.5. the present invention effectively can prevent podwer gun from blocking, and
Podwer gun self-skimming can be realized.
Brief description of the drawings
Fig. 1 is the dephosphorization of molten iron apparatus structure schematic diagram of rotary blowing pulvis；
Fig. 2 for Fig. 1 A to enlarged drawing；
Wherein, 1- supports；2- anti-splash devices；3- feeding systems；4- rotating devices；5- hot-metal bottles；6- hot-metal ladle and carriages；7-
Podwer gun；8- injection systems；9- lifts；10- support arms；11- swivel joints；12- motors；13- hollow shafts；14- flanges.
Embodiment
Illustrated with reference to specific embodiment：
A kind of dephosphorization of molten iron device of rotary blowing pulvis, carries out dephosphorization of molten iron processing unit, including lowering or hoisting gear, blowout prevention
Splash device 2, feeding system 3, injection system 8, rotating device 4, podwer gun 7；Lowering or hoisting gear includes support 1, lift 9 and support
Arm 10, support 1 is connected with anti-splash device 2, and support 1 is connected by support arm 10 with lift 9, and lift 9 uses hydraulic pressure system
System is used as driving force；Described podwer gun 7 is inverted T-shaped hollow tube, and tube head two ends carry spray orifice, outer wrap refractory material；Institute
The rotating device 4 stated includes swivel joint 11 and the internal motor 12 for carrying hollow shaft 13, the generally threeway knot of swivel joint 11
Structure, internal bearings are connected with the upper end of hollow shaft 13 in motor 12, swivel joint horizontal direction respectively with pipeline communication, hollow shaft
13 lower ends are connected by flange 14 with the upper end of podwer gun 7；The anti-splash device 2 is up-small and down-big cylinder, rotating device 4
In in anti-splash device 2, described pipeline through anti-splash device 2 and by metal hose respectively with feeding system 3 and injection
System 8 is connected, and the lower surface of anti-splash device 2 covers one layer of refractory material；Anti-splash device 2 is connected with lowering or hoisting gear, antispray
Device 2, rotating device 4, podwer gun 7 can be moved with lowering or hoisting gear oscilaltion；Flux and injection system in feeding system 3
Carrier gas in 8 is blown into podwer gun 7 by rotating device 4, realizes rotating injecting powder.
Power of motor and size, are determined according to the specific size of podwer gun 7 and weight；
The 110~130% of a diameter of tank mouth external diameter of hot-metal bottle 5 of the lower surface of anti-splash device 2；
The inside of podwer gun 7 is made using wear-resisting seamless steel pipe of welding means, and T-shaped shower nozzle transverse direction diameter of steel tube is
The 2/3~4/5 of longitudinal diameter of steel tube；Refractory material outside length is the 1/2~2/3 of podwer gun total length.
The hot-metal ladle and carriage 6 that hot-metal bottle 5 is loaded with after blast furnace casting is opened to processing position, using rotary blowing pulvis iron of the present invention
Water dephosphorization apparatus, carries out dephosphorization of molten iron processing.
Embodiment 1：
Dephosphorization of molten iron experiment is carried out using the present invention, the maximum gauge of anti-splash device 2 is the tank mouth external diameter of hot-metal bottle 5
110%, its refractory material length of the outer wrap refractory material of podwer gun 7 is the 1/2 of podwer gun total length；Start injection system 8
It is that more than 99.9%, pressure 0.4MPa nitrogen or inert gas are blown into molten iron by podwer gun 7 by purity, is risen while opening
Drop machine 9 drops to outer wrap refractory material podwer gun 7 away from the bottom 400mm of hot-metal bottle 5, when podwer gun 7 reaches working position
Rotating device 4 is opened, rotary speed is 10 revs/min, passes through the Dephosphorising agent total amount for needing to add while starting feeding system 3
Podwer gun 7 is blown in molten iron；The ratio of its Dephosphorising agent waste material containing iron oxide and lime is 1:1, iron oxide waste material iron oxide contains
Measure as 85%, calcium oxide content 90% in lime, Dephosphorising agent particle diameter is 0.09mm；Pressure is adjusted to work by adjustment injection system 8
Pressure 0.8MP is until dephosphorization of molten iron is completed.After the completion of dephosphorization of molten iron, close feeding system 3 and start lift 9 by podwer gun 7
It is promoted to more than molten iron level, adjustment injection system 8 adjusts pressure to 0.9MP, and rotary speed is adjusted to by adjustment rotating device 4
30 revs/min, carry out 1min slagging-off, anti-blocking processing.Carry out taking off Slag treatment after the completion of dephosphorization of molten iron.Complete after above-mentioned processing, press
More solito carries out subsequent operations.Following technical indicator can be realized using above-mentioned process and device：Hot metal temperature drop is 62 DEG C, place
The reason time is 35min；Dephosphorization rate is 90%
Embodiment 2：
Dephosphorization of molten iron experiment is carried out using the present invention, the maximum gauge of anti-splash device 2 is the tank mouth external diameter of hot-metal bottle 5
120%, its refractory material length of the outer wrap refractory material of podwer gun 7 is the 2/3 of podwer gun total length；Start injection system 8
It is that more than 99.9%, pressure 0.5MPa nitrogen or inert gas are blown into molten iron by podwer gun 7 by purity, is risen while opening
Drop machine 9 drops to outer wrap refractory material podwer gun 7 away from the bottom 450mm of hot-metal bottle 5, when podwer gun 7 reaches working position
Rotating device 4 is opened, rotary speed is 20 revs/min, passes through the Dephosphorising agent total amount for needing to add while starting feeding system 3
Podwer gun 7 is blown in molten iron；The ratio of its Dephosphorising agent waste material containing iron oxide and lime is 1:1, iron oxide waste material iron oxide contains
Measure as 90%, calcium oxide content 94% in lime, Dephosphorising agent particle diameter is 0.106mm；Pressure is adjusted to work by adjustment injection system 8
Pressure 0.9MP is until dephosphorization of molten iron is completed.After the completion of dephosphorization of molten iron, close feeding system 3 and start lift 9 by podwer gun 7
It is promoted to more than molten iron level, adjustment injection system 8 adjusts pressure to 1.0MP, and rotary speed is adjusted to by adjustment rotating device 4
40 revs/min, carry out 2min slagging-off, anti-blocking processing.Carry out taking off Slag treatment after the completion of dephosphorization of molten iron.Complete after above-mentioned processing, press
More solito carries out subsequent operations.Following technical indicator can be realized using above-mentioned process and device：Hot metal temperature drop is 60 DEG C, place
The reason time is 30min；Dephosphorization rate is 95%
Embodiment 3：
Dephosphorization of molten iron experiment is carried out using the present invention, the maximum gauge of anti-splash device 2 is the tank mouth external diameter of hot-metal bottle 5
130%, its refractory material length of the outer wrap refractory material of podwer gun 7 is the 2/3 of podwer gun total length；Start injection system 8
It is that more than 99.9%, pressure 0.6MPa nitrogen or inert gas are blown into molten iron by podwer gun 7 by purity, is risen while opening
Drop machine 9 drops to outer wrap refractory material podwer gun 7 away from the bottom 500mm of hot-metal bottle 5, when podwer gun 7 reaches working position
Rotating device 4 is opened, rotary speed is 30 revs/min, passes through the Dephosphorising agent total amount for needing to add while starting feeding system 3
Podwer gun 7 is blown in molten iron；The ratio of its Dephosphorising agent waste material containing iron oxide and lime is 1:1, iron oxide waste material iron oxide contains
Measure as 95%, calcium oxide content 98% in lime, Dephosphorising agent particle diameter is 0.129mm；Pressure is adjusted to work by adjustment injection system 8
Pressure 0.9MP is until dephosphorization of molten iron is completed.After the completion of dephosphorization of molten iron, close feeding system 3 and start lift 9 by podwer gun 7
It is promoted to more than molten iron level, adjustment injection system 8 adjusts pressure to 1.1MP, and rotary speed is adjusted to by adjustment rotating device 4
50 revs/min, carry out 2min slagging-off, anti-blocking processing.Carry out taking off Slag treatment after the completion of dephosphorization of molten iron.Complete after above-mentioned processing, press
More solito carries out subsequent operations.Following technical indicator can be realized using above-mentioned process and device：Hot metal temperature drop is 64 DEG C, place
The reason time is 33 DEG C；Dephosphorization rate is 98%
Implementation result：
In certain iron and steel enterprise's steel mill, using the dephosphorization method for molten iron and device of rotary blowing pulvis, to molten iron tankage size
260t molten iron, carries out dephosphorization of molten iron experiment, and obtains good effect, specific as follows：
Molten steel dephosphorization of molten iron experiment is carried out using the present invention, its dephosphorization rate is 90~98%, average 94.33%, molten iron temperature
It is reduced to 60~64 DEG C, averagely 62 DEG C；Dephosphorization of molten iron processing time is 30~35min, average 32.67min；Dephosphorization of molten iron items skill
Art norm controlling is stable, and its dephosphorization rate improves 10~15%, temperature drop and reduces by more than 30 DEG C, iron compared with conventional dephosphorization of molten iron technique
The water dephosphorization treatment time averagely shortens more than 60min.In a word, using the dephosphorization method for molten iron of brand-new rotary blowing pulvis than normal
Rule dephosphorization method for molten iron is greatly improved in the technical indicators such as dephosphorization rate, temperature drop, dephosphorization of molten iron processing time, the present invention
Succeed in developing will be dephosphorization of molten iron technique a big innovation.
Claims (4)
1. a kind of dephosphorization of molten iron device of rotary blowing pulvis, it is characterised in that：Including lowering or hoisting gear, anti-splash device, feed
System, injection system, rotating device, podwer gun；Described podwer gun is inverted T-shaped hollow tube, and tube head two ends carry spray orifice, outside
Wrap up refractory material；Described rotating device includes swivel joint and the internal motor for carrying hollow shaft, and swivel joint is generally
Three-port structure, internal bearings are connected with the hollow shaft upper end in motor, swivel joint horizontal direction respectively with pipeline communication, it is hollow
Axle lower end is connected by flange with podwer gun upper end；The anti-splash device is up-small and down-big cylinder, and rotating device is located at anti-
In spraying and splashing facility, described pipeline respectively with feeding system and injection system is connected through anti-splash device and by metal hose
Logical, anti-splash device lower surface covers one layer of refractory material；Anti-splash device is connected with lowering or hoisting gear, anti-splash device, rotation
Device, podwer gun can be moved with lowering or hoisting gear oscilaltion；Described lowering or hoisting gear includes support, lift and support arm,
Support is connected with anti-splash device, and support is connected by support arm with lift；In flux and injection system in feeding system
Carrier gas podwer gun is blown into by rotating device, realize rotating injecting powder.
2. a kind of dephosphorization of molten iron device of rotary blowing pulvis according to claim 1, it is characterised in that：The antispray
The 110~130% of a diameter of tank mouth external diameter of device lower surface.
3. a kind of dephosphorization of molten iron device of rotary blowing pulvis according to claim 1, it is characterised in that：The podwer gun
Horizontal diameter of steel tube is the 2/3~4/5 of longitudinal diameter of steel tube；Refractory material outside length is the 1/2~2/ of podwer gun total length
3。
4. the dephosphorization method of rotary blowing pulvis dephosphorization of molten iron device described in a kind of application claim 1, it is characterised in that including
Following steps：
1) dephosphorization of molten iron processing will be carried out after blast furnace casting；
2) start injection system, be more than 99.9%, 0.4~0.6MPa of pressure nitrogen or inert gas by dusting by purity
Rifle is blown into molten iron, drops to podwer gun away from molten iron 400~500mm of pot bottom while opening lowering or hoisting gear, when podwer gun reaches
Rotating device is opened during working position, rotary speed is 10~30 revs/min, while the dephosphorization of addition will be needed by starting feeding system
Agent total amount is blown into molten iron by podwer gun, and its alloy particle diameter is 0.09~0.125mm, and pressure is adjusted to by adjustment injection system
0.8~0.9MP of operating pressure is until dephosphorization is completed；
3) after the completion of dephosphorization of molten iron, close feeding system and start lowering or hoisting gear podwer gun is promoted to more than molten iron level, adjust
Whole injection system adjusts pressure to 0.9~1.1MP, and rotary speed is adjusted to 30~50 revs/min by adjustment rotating device, to spray
Powder rifle carries out 1~2min slagging-off and anti-blocking processing；
4) molten iron drossing processing and subsequent operations are carried out；
The mass ratio of waste material containing iron oxide and lime is 40~60 in described Dephosphorising agent:60~40, wherein useless containing iron oxide
Expect calcium oxide mass percentage content >=90% in iron oxide mass percentage content >=85%, lime.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710269742.8A CN107267703A (en) | 2017-04-24 | 2017-04-24 | The dephosphorization of molten iron device and dephosphorization method of a kind of rotary blowing pulvis |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710269742.8A CN107267703A (en) | 2017-04-24 | 2017-04-24 | The dephosphorization of molten iron device and dephosphorization method of a kind of rotary blowing pulvis |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107267703A true CN107267703A (en) | 2017-10-20 |
Family
ID=60073802
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710269742.8A Pending CN107267703A (en) | 2017-04-24 | 2017-04-24 | The dephosphorization of molten iron device and dephosphorization method of a kind of rotary blowing pulvis |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107267703A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107245544A (en) * | 2017-04-24 | 2017-10-13 | 鞍钢股份有限公司 | A kind of ladle slag modification rotating injecting powder device and method for modifying |
| CN107267711A (en) * | 2017-04-24 | 2017-10-20 | 鞍钢股份有限公司 | The molten steel alloying device and alloyage process of a kind of rotary blowing pulvis |
| CN107723416A (en) * | 2017-11-15 | 2018-02-23 | 钢铁研究总院 | A kind of ladle rotation spray gun dephosphorization apparatus |
| CN112458227A (en) * | 2020-10-27 | 2021-03-09 | 扬州一川镍业有限公司 | Dephosphorization equipment for producing nickel pig iron by using laterite-nickel ore and using method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101892352A (en) * | 2010-07-27 | 2010-11-24 | 辽宁天和矿产有限公司 | Arc furnace deep dephosphorization technology and deep dephosphorization agent thereof |
| CN203096107U (en) * | 2013-02-07 | 2013-07-31 | 武汉钢铁(集团)公司 | Blowing desulfurization spray gun for torpedo ladle |
| CN106086312A (en) * | 2016-07-07 | 2016-11-09 | 中冶南方工程技术有限公司 | A kind of Desulfuring Device of Hot Metal and method |
| CN107245544A (en) * | 2017-04-24 | 2017-10-13 | 鞍钢股份有限公司 | A kind of ladle slag modification rotating injecting powder device and method for modifying |
| CN107267711A (en) * | 2017-04-24 | 2017-10-20 | 鞍钢股份有限公司 | The molten steel alloying device and alloyage process of a kind of rotary blowing pulvis |
-
2017
- 2017-04-24 CN CN201710269742.8A patent/CN107267703A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101892352A (en) * | 2010-07-27 | 2010-11-24 | 辽宁天和矿产有限公司 | Arc furnace deep dephosphorization technology and deep dephosphorization agent thereof |
| CN203096107U (en) * | 2013-02-07 | 2013-07-31 | 武汉钢铁(集团)公司 | Blowing desulfurization spray gun for torpedo ladle |
| CN106086312A (en) * | 2016-07-07 | 2016-11-09 | 中冶南方工程技术有限公司 | A kind of Desulfuring Device of Hot Metal and method |
| CN107245544A (en) * | 2017-04-24 | 2017-10-13 | 鞍钢股份有限公司 | A kind of ladle slag modification rotating injecting powder device and method for modifying |
| CN107267711A (en) * | 2017-04-24 | 2017-10-20 | 鞍钢股份有限公司 | The molten steel alloying device and alloyage process of a kind of rotary blowing pulvis |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107245544A (en) * | 2017-04-24 | 2017-10-13 | 鞍钢股份有限公司 | A kind of ladle slag modification rotating injecting powder device and method for modifying |
| CN107267711A (en) * | 2017-04-24 | 2017-10-20 | 鞍钢股份有限公司 | The molten steel alloying device and alloyage process of a kind of rotary blowing pulvis |
| CN107245544B (en) * | 2017-04-24 | 2020-09-29 | 鞍钢股份有限公司 | Rotary powder injection device for ladle slag modification and modification method |
| CN107723416A (en) * | 2017-11-15 | 2018-02-23 | 钢铁研究总院 | A kind of ladle rotation spray gun dephosphorization apparatus |
| CN112458227A (en) * | 2020-10-27 | 2021-03-09 | 扬州一川镍业有限公司 | Dephosphorization equipment for producing nickel pig iron by using laterite-nickel ore and using method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107267703A (en) | The dephosphorization of molten iron device and dephosphorization method of a kind of rotary blowing pulvis | |
| EP2796569B1 (en) | Converter steelmaking method | |
| CN107190122B (en) | Dephosphorization device and dephosphorization method for refining rotary blowing | |
| CN100354562C (en) | High alloy steel seamless steel pipe and production method thereof | |
| AU2012202044B2 (en) | Flexible minimum energy utilization electric arc furnace system and processes for making steel products | |
| CN110923394B (en) | Steelmaking apparatus and steelmaking method | |
| JPH10152714A (en) | Method for refining molten iron | |
| CN110616293B (en) | Method for adding rare earth into molten steel | |
| CN107267711A (en) | The molten steel alloying device and alloyage process of a kind of rotary blowing pulvis | |
| CN206828561U (en) | A kind of metallurgy uses rotating injecting powder device | |
| CN110283962A (en) | A kind of technique of non-orientation silicon steel aluminium deoxidation product denaturation | |
| CN116103466B (en) | Top powder spraying high-efficiency steelmaking method and system for large-scale electric arc furnace | |
| CN111194357A (en) | Improved production of low carbon steel | |
| CN102559999A (en) | Low-temperature molten iron injection dephosphorization pretreatment method | |
| JP5552846B2 (en) | Converter refractory protection method for converter | |
| US5298053A (en) | Consumable lance for oxygen injection and desulfurization and method | |
| CN107287375A (en) | A kind of method of molten iron pretreatment slag skimming | |
| JP5407186B2 (en) | Dust generation prevention method in remaining hot water return work | |
| CN107723416B (en) | Ladle rotation spray gun dephosphorization device | |
| JP2018035376A (en) | Hot metal dephosphorization method | |
| JP3835358B2 (en) | Method for refining molten metal | |
| CN112609042A (en) | Method for modifying slag in final casting stage of ladle with cover | |
| JP5358975B2 (en) | Hot metal refining method | |
| JP4779464B2 (en) | Method for producing low phosphorus hot metal | |
| JPH0741825A (en) | Top blowing lange device in vacuum degassing equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20171020 |
|
| RJ01 | Rejection of invention patent application after publication |