CN104928440B - Hot metal desulphurization device capable of saving desulfurizing agents and application thereof - Google Patents
Hot metal desulphurization device capable of saving desulfurizing agents and application thereof Download PDFInfo
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- CN104928440B CN104928440B CN201510427173.6A CN201510427173A CN104928440B CN 104928440 B CN104928440 B CN 104928440B CN 201510427173 A CN201510427173 A CN 201510427173A CN 104928440 B CN104928440 B CN 104928440B
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- desulfurizing agent
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Abstract
The invention relates to a hot metal desulphurization device capable of saving desulfurizing agents and application thereof. The hot metal desulphurization device is located above a hot metal ladle containing hot metal and comprises a desulfurizing agent articulated chute composed of a fixed pipe and a movable pipe. The movable pipe is internally provided with a spiral flow component. The device further comprises a desulfurizing agent stock bin communicated with the fixed pipe and an air feeder connected with the fixed pipe through an air feeding pipe. The air feeder feeds clean air or non oxidative gas into the desulfurizing agent articulated chute, the desulfurizing agent stock bin conveys the desulfurizing agents to the desulfurizing agent articulated chute, the gas is mixed with the desulfurizing agents to form low-speed gas-solid two-phase flow rotating fluid through the spiral flow component, and the gas-solid two-phase flow rotating fluid makes full contact with the hot metal in the rotating state, so that the desulfurizing agents are effectively absorbed by the hot metal.
Description
Technical field
The present invention relates to field of iron and steel smelting, Desulfuring Device of Hot Metal more particularly, to a kind of saving desulfurizing agent and its should
With.
Background technology
It is one of common method of desulfurizing iron that agitator rotates stirring desulphurization method, the method have desulphurizing ability it is strong, can
The advantages of effectively skimming, the content of Sulfur Content in Hot Iron can be down to very low level.The process of desulfurizing iron is carried out using the method
It is：Desulfurizing agent --- quick lime falls into the molten iron surface being stirred by elephant trunk, and molten iron of the quick lime in whipping process fills
Divide and merge and remove the harmful substance in molten iron --- floating to molten iron upper surface in the form of slag after sulphur, then by device for removing slag
The slag that melts above molten iron is clawed.
About 1300 DEG C of high temperature liquid iron temperature in ladle, molten iron be stirred during with molten iron air above
Strong heat exchange is produced, in the air after being heated a large amount of dust is contained, the dusty gas of rising is by being arranged on ladle
The enclosure of side drains into dust arrester process, the dusty gas speed about 3m/s of rising.Due to quick lime granularity it is less, wherein
The quick lime of granularity≤100 μm occupies most of ratio, therefore during quick lime falls into ladle, has what is be partly raised to contain
Dust and gas body is swept along to dust arrester, has both increased the consumption of quick lime, and the burden of dust arrester is increased again.Regular situation
Under, molten iron per ton needs the quick lime desulfurizing agent of about 9kg, but rotates stirring desulphurization method using agitator, and actual molten iron per ton disappears
The quick lime desulfurizing agent of about 11kg is consumed, has continuously been produced by steelmaking converter of the nominal capacity for 180t, it is about every year to consume raw stone more
Grey 2800t, is worth about 2,000,000 yuan；To also increase the electricity charge, deduster deashing energy consumption because dust arrester load increases in addition and remove
The processing cost of dirt ash.
Can be seen from the above, agitator rotates stirring desulphurization method and carries out desulfurizing iron, although desulfurized effect is good and de-
Sulphur efficiency is stablized, but its desulphurization cost is higher.Application No. 201080029394.3, patent name is " sulfur method of molten iron "
Chinese patent disclose a kind of method of reduction sorbent consumption, its main technical schemes be using by the way of being blown by gas-solid
Two phase flow is directly blown to molten iron surface, so as to drastically reduce the area the desulfurizing agent that simultaneously band to dust arrester is swept along by high-temperature flue gas,
Its conveying gas is high pressure nitrogen or other non-oxidizing gas.The major defect of the technology is：Firstth, it is blown tube section general
Less less than Φ 100, air-flow is that direct current and speed are fast, so as to causing acting surface of the Dual-Phrase Distribution of Gas olid on molten iron surface little and
Desulfurizing agent is easily in molten iron surface aggregation, and the speed of molten iron Absorption Desulfurization agent is slower；Secondth, it is high to the granularity requirements of desulfurizing agent, take off
The optimal granularity of sulphur agent is 30～400 μm, and the desulfurizing agent beyond this scope is agglomerating easily in molten iron surface aggregation, desulfuration efficiency drop
It is low；3rd, desulfurizing agent can not effectively be disperseed during conveying gas motion, also be easily caused desulfurizing agent in molten iron surface aggregation
And it is slack-off by molten iron infiltration rate；4th, because air velocity is fast, portion gas will go deep in molten iron, therefore can only adopt non-oxygen
The property changed conveying gas, otherwise affects molten steel quality, also therefore increased the cost of desulfurization.
The content of the invention
The purpose of the present invention provides a kind of reduction desulfurizing agent for the defect for overcoming above-mentioned prior art to exist
Consume, make desulfurizing agent faster by the Desulfuring Device of Hot Metal of the saving desulfurizing agent of molten iron absorption and its application.
The purpose of the present invention can be achieved through the following technical solutions：
It is a kind of save desulfurizing agent Desulfuring Device of Hot Metal, positioned at be loaded with molten iron ladle top, including：
The desulfurizing agent elephant trunk combined by fixing pipe and moving tube, is provided with eddy flow component in described moving tube.
The desulfurizing agent feed bin connected with fixing pipe.
The pressure fan being connected with fixing pipe by ajutage.
Described eddy flow component is located at moving tube near its exit.
Described eddy flow component is made up of core pipe with the outer equally distributed several swirl vanes of core pipe are connected to, swirl vane
45 °～75 ° of the established angle of 30 °～45 ° of the established angle in distorted shape, its inner side and core pipe, its outside and mobile inside pipe wall so as to
The swirling eddy speed of outlet is adapted on the basis of the thermal current for overcoming rising with the rotary speed in molten iron face.Using calculating
Air velocity distribution in machine fluid simulation technical modelling moving tube, understands the distribution feelings of the air velocity, pressure and temperature in flow field
Condition, on this basis the distortion radius and established angle and quantity of appropriate design swirl vane, makes eddy flow speed out in moving tube
Degree reaches 20m/s or so, so as to be adapted with the rotary speed of molten iron face about 15～25m/s.
Internal diameter >=the 250mm of described fixing pipe, the internal diameter >=350mm of moving tube.
The import of described pressure fan arranges control valve, according to desulfurizing iron regulating working conditions blast intensity.
Described pressure fan sends into cleaned air or non-oxidizing gas in desulfurizing agent elephant trunk.
The application of the Desulfuring Device of Hot Metal of desulfurizing agent is saved, pressure fan sends into cleaned air or non-oxygen in desulfurizing agent elephant trunk
The property changed gas, desulfurizing agent feed bin conveys desulfurizing agent in desulfurizing agent elephant trunk, and gas is with desulphurizer mixing and through eddy flow component shape
Into the Dual-Phrase Distribution of Gas olid rotating fluid of low speed, Dual-Phrase Distribution of Gas olid rotating fluid is fully contacted with the molten iron in rotation status, makes
Desulfurizing agent is effectively absorbed by molten iron.
Moving tube is extend on the liquid level of the molten iron contained in ladle at about 500mm.
Compared with prior art, the present invention has advantages below：
(1) substantially avoided the thermal current risen from molten iron surface to sweep along the desulfurizing agent for falling, and containing desulfurizing agent
Dual-Phrase Distribution of Gas olid eddy flow face it is bigger than the patent of above-mentioned Application No. 201080029394.3 more than 11 times, desulfurizing agent can be by molten iron
Absorb faster and more effectively, so as to greatly reduce the consumption of desulfurizing agent and the load of dust arrester.
(2) it is slow rotating fluid due to conveying gas, conveying gas will not go deep in molten iron, so as to avoid
Impact of the moisture to molten iron in conveying gas, therefore cleaned air rather than other non-oxidizing gas can be adopted as conveying gas,
Desulphurization cost is reduced.
(3) the eddy flow component for adopting can also sufficiently be disperseed to the desulfurizing agent in gas, and to desulfurizing agent grain
Degree has no special requirements, it is to avoid conglomerate of the desulfurizing agent on molten iron surface, improves rate of sulphur expulsion.
Description of the drawings
Fig. 1 is the structural representation of the present invention；
Fig. 2 is the structural representation of eddy flow component.
In figure, 1- agitators, 2- ladle, 3- enclosures, 4- desulfurizing agent feed bins, 5- fixing pipes, 6- moving tubes, 7- air-supplies
Pipe, 8- pressure fan, 9- control valves, 10- eddy flow components.
Specific embodiment
Below in conjunction with the accompanying drawings the present invention is described in detail with specific embodiment.
Embodiment
A kind of Desulfuring Device of Hot Metal for saving desulfurizing agent, its structure is as shown in figure 1, positioned at the ladle 2 for being loaded with molten iron
Top, including the desulfurizing agent elephant trunk combined by fixing pipe 5 and moving tube 6, the internal diameter >=250mm of fixing pipe 5, moving tube 6
Internal diameter 400mm, mutually nested to define desulfurizing agent elephant trunk, moving tube 6 can be moved up and down.Additionally include and fixing pipe 5
The desulfurizing agent feed bin 4 of connection, the pressure fan 8 being connected with fixing pipe 5 by ajutage 7.The import of pressure fan 8 arranges control valve
9, according to desulfurizing iron regulating working conditions blast intensity, cleaned air or non-oxidizing gas are sent into in desulfurizing agent elephant trunk.
Eddy flow component 10 is provided near its exit in moving tube 6, its structure is as shown in Fig. 2 eddy flow component 10 is by core
Pipe and the several swirl vanes composition being connected to outside core pipe, swirl vane is in distorted shape, 30 ° of the established angle of its inner side and core pipe,
Its outside and 60 ° of the established angle of mobile inside pipe wall so as to which the swirling eddy speed of outlet is on the basis of the thermal current for overcoming rising
The rotary speed in upper and molten iron face is adapted.Using the air velocity distribution in computer fluid simulation technical modelling moving tube, understand
The distribution situation of air velocity, pressure and temperature in flow field, on this basis the distortion radius of appropriate design swirl vane and
Established angle and quantity, make the swirl velocity in moving tube out reach 20m/s or so, so as to molten iron face about 15～25m/s's
Rotary speed is adapted.
During desulfurizing iron, pressure fan 8 is opened, moving tube 6 is moved down and close molten iron surface, and desulfurizing agent feed bin 4 is stored
Desulfurizing agent be that quick lime enters quick lime elephant trunk fixed tube 5, subsequently into moving tube 6, gas is with desulphurizer mixing and through revolving
Stream component forms the Dual-Phrase Distribution of Gas olid rotating fluid of low speed, and the Dual-Phrase Distribution of Gas olid fluid from moving tube 6 out is with eddy flow state
To molten iron surface, the agitated device 1 of molten iron is stirred, and gas-liquid two-phase fluid and the molten iron of rotation of eddy flow state merge and remove molten iron
In harmful substance --- sulphur.Adjust the rotary speed of the adjustable Dual-Phrase Distribution of Gas olid of aperture of the valve 9 of the import of pressure fan 8.
The top of ladle 2 is additionally provided with the enclosure 3 for facilitating flue gas to discharge.
Said apparatus are tested on 180t steelmaking converter desulfurization stations, in air-supply 3000～6000m3/h of fan delivery
It is adjustable, 180t ladle liquid level radius 1750mm, mobile tube hub to ladle centre distance 1167mm, in moving tube out
Two phase flow outer ring rotary speed 20m/s, linear velocity 20m/s of the molten iron rotation on moving tube center molten iron surface.In this feelings
Under condition, the consumption of lime drops to 9.5kg by former molten iron 11kg per ton.
Claims (7)
1. it is a kind of save desulfurizing agent Desulfuring Device of Hot Metal, positioned at be loaded with molten iron ladle top, it is characterised in that the dress
Put including：
The desulfurizing agent elephant trunk combined by fixing pipe and moving tube, is provided with eddy flow component in described moving tube,
The desulfurizing agent feed bin connected with fixing pipe,
The pressure fan being connected with fixing pipe by ajutage,
Described eddy flow component is made up of core pipe and the several swirl vanes being connected to outside core pipe, and swirl vane is in distorted shape, its
Inner side and 30 °～45 ° of the established angle of core pipe, with 45 °～75 ° of the established angle of mobile inside pipe wall on the outside of it, make in moving tube out
The rotary speed in swirl velocity and molten iron face be adapted.
2. it is according to claim 1 it is a kind of save desulfurizing agent Desulfuring Device of Hot Metal, it is characterised in that described eddy flow group
Part is located at moving tube near its exit.
3. it is according to claim 1 it is a kind of save desulfurizing agent Desulfuring Device of Hot Metal, it is characterised in that described fixing pipe
Internal diameter >=250mm, the internal diameter >=350mm of moving tube.
4. it is according to claim 1 it is a kind of save desulfurizing agent Desulfuring Device of Hot Metal, it is characterised in that described pressure fan
Import arrange control valve, according to desulfurizing iron regulating working conditions blast intensity.
5. it is according to claim 1 it is a kind of save desulfurizing agent Desulfuring Device of Hot Metal, it is characterised in that described pressure fan
Cleaned air or non-oxidizing gas are sent into in desulfurizing agent elephant trunk.
6. the application of the Desulfuring Device of Hot Metal for saving desulfurizing agent as claimed in claim 1, it is characterised in that pressure fan is to desulfurization
Send into cleaned air or non-oxidizing gas in agent elephant trunk, desulfurizing agent feed bin conveys desulfurizing agent in desulfurizing agent elephant trunk, gas with
Desulphurizer mixing and through eddy flow component formed low speed Dual-Phrase Distribution of Gas olid rotating fluid, Dual-Phrase Distribution of Gas olid rotating fluid be in
The molten iron of rotation status is fully contacted, and desulfurizing agent is effectively absorbed by molten iron.
7. a kind of application of Desulfuring Device of Hot Metal for saving desulfurizing agent according to claim 6, it is characterised in that moving tube
It extend at liquid level above 500mm of the molten iron contained in ladle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510427173.6A CN104928440B (en) | 2015-07-20 | 2015-07-20 | Hot metal desulphurization device capable of saving desulfurizing agents and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510427173.6A CN104928440B (en) | 2015-07-20 | 2015-07-20 | Hot metal desulphurization device capable of saving desulfurizing agents and application thereof |
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| CN104928440A CN104928440A (en) | 2015-09-23 |
| CN104928440B true CN104928440B (en) | 2017-05-10 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108486307A (en) * | 2018-04-17 | 2018-09-04 | 中冶南方工程技术有限公司 | A kind of converter dust-removing gray iron recovery system and method based on KR desulfurization station |
| CN115386682A (en) * | 2022-08-30 | 2022-11-25 | 江苏沙钢集团有限公司 | Two-step deep iron desulphurization device and process method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2371196Y (en) * | 1999-05-27 | 2000-03-29 | 刘东业 | Equipment for desulfurating of molten iron by single blasting gasified granular magnesium |
| KR101053418B1 (en) * | 2008-12-12 | 2011-08-01 | 주식회사 포스코 | Melting Ladle |
| JP4844679B2 (en) * | 2009-03-11 | 2011-12-28 | Ｊｆｅスチール株式会社 | Hot metal desulfurization treatment method |
| CN201439047U (en) * | 2009-05-15 | 2010-04-21 | 武汉凯迪电力环保有限公司 | Recycling material fluidization conveying device of semi-dry desulphurization system |
| CN102471814B (en) * | 2009-06-30 | 2016-06-15 | 杰富意钢铁株式会社 | The sulfur method of molten iron |
| CN204848931U (en) * | 2015-07-20 | 2015-12-09 | 上海信孚环保技术工程有限公司 | Save molten iron desulphurization device of desulfurizer |
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