CN104928440A - 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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- CN104928440A CN104928440A CN201510427173.6A CN201510427173A CN104928440A CN 104928440 A CN104928440 A CN 104928440A CN 201510427173 A CN201510427173 A CN 201510427173A CN 104928440 A CN104928440 A CN 104928440A
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- sweetening 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, especially relate to a kind of Desulfuring Device of Hot Metal and application thereof of saving sweetening agent.
Background technology
It is one of common method of desulfurizing iron that agitator rotates stirring desulphurization method, the method have sweetening power strong, effectively can skim, the content of Sulfur Content in Hot Iron can be down to the advantages such as very low level.The process adopting the method to carry out desulfurizing iron is: sweetening agent---unslaked lime falls into the molten iron surface be stirred by elephant trunk, unslaked lime is fully merging with the molten iron in whipping process and is removing the objectionable impurities in molten iron---after sulphur with the form of slag floating to molten iron upper surface, then by device for removing slag, the slag that melts above molten iron is clawed.
Be in the high temperature liquid iron temperature about 1300 DEG C in hot metal ladle, in the process that molten iron is stirred with molten iron above air produce strong heat exchange, by in the air after heating containing a large amount of dust, the dusty gas risen drains into cleaning apparatus process by the extraction hood being arranged on hot metal ladle side, and the dusty gas speed of rising is about 3m/s.Because unslaked lime granularity is less, wherein the unslaked lime of granularity≤100 μm occupies most of ratio, therefore unslaked lime falls into the process of hot metal ladle, has part to be swept along to cleaning apparatus by the dusty gas risen, both increase the consumption of unslaked lime, turn increase the burden of cleaning apparatus.Under regular situation, molten iron per ton needs the unslaked lime sweetening agent of about 9kg, but adopt agitator to rotate stirring desulphurization method, the actual molten steel consumption per ton unslaked lime sweetening agent of about 11kg, by the steel-making converter continuous seepage that nominal capacity is 180t, annual about many consumption unslaked lime 2800t, are worth about 2,000,000 yuan; Also will increase the processing costs of the electricity charge, fly-ash separator deashing energy consumption and dedusting ash because cleaning apparatus load increases in addition.
From above situation, agitator rotates stirring desulphurization method and carries out desulfurizing iron, although the good and desulfuration efficiency of sweetening effectiveness is stablized, its desulphurization cost is higher.The Chinese patent that application number is 201080029394.3, patent name is " sulfur method of molten iron " discloses a kind of method reducing sorbent consumption, its main technical schemes adopts the mode of winding-up Dual-Phrase Distribution of Gas olid directly to be blown to molten iron surface, thus drastically reduce the area and to be swept along by high-temperature flue gas and to bring to the sweetening agent of cleaning apparatus, its delivering gas is high pressure nitrogen or other non-oxidizing gas.The main drawback of this technology is: the first, injection tube cross section is generally no more than Φ 100, less, air-flow is direct current and speed is fast, thus causes Dual-Phrase Distribution of Gas olid at the little and sweetening agent of the plane of action on molten iron surface easily at molten iron surface aggregation, and the speed of molten iron Absorption Desulfurization agent is slower; The second, high to the granularity requirements of sweetening agent, the optimum size of sweetening agent is 30 ~ 400 μm, and the sweetening agent exceeding this scope is all easy to be agglomerating at molten iron surface aggregation, and desulfuration efficiency reduces; Three, sweetening agent can not effectively be disperseed in delivering gas moving process, also easily causes sweetening agent at molten iron surface aggregation and slack-off by molten iron absorption rate; Four, because gas velocity is fast, portion gas will go deep in molten iron, therefore can only adopt non-oxidizable delivering gas, otherwise affect molten steel quality, also therefore add the cost of desulfurization.
Summary of the invention
Object of the present invention is exactly provide a kind of consumption reducing sweetening agent, the Desulfuring Device of Hot Metal of the saving sweetening agent that sweetening agent is absorbed by molten iron sooner and application thereof to overcome defect that above-mentioned prior art exists.
Object of the present invention can be achieved through the following technical solutions:
Save a Desulfuring Device of Hot Metal for sweetening agent, be positioned at be loaded with molten iron hot metal ladle above, comprising:
The sweetening agent elephant trunk combined by fixed tube and movable pipe, is provided with eddy flow assembly in described movable pipe.
The sweetening agent feed bin be communicated with fixed tube.
By the fan that blast tube is connected with fixed tube.
Described eddy flow assembly is positioned at movable pipe near its exit.
Described eddy flow assembly is by core pipe and be connected to the outer equally distributed several swirl vane of core pipe and form, swirl vane is distorted shape, with the installation angle 30 ° ~ 45 ° of core pipe inside it, with the installation angle 45 ° ~ 75 ° of movable pipe inwall outside it, the swirling eddy speed making it export adapts with the speed of rotation in molten iron face on the basis of hot gas flow overcoming rising.Adopt the air velocity distribution in computer fluid simulation technical modelling movable pipe, understand the distribution situation of gas velocity, pressure and the temperature in flow field, the distortion radius of appropriate design swirl vane and installation angle and quantity on this basis, to make in movable pipe swirl velocity out reach about 20m/s, thus adapt with the speed of rotation of molten iron face about 15 ~ 25m/s.
Internal diameter >=the 250mm of described fixed tube, the internal diameter >=350mm of movable pipe.
The import of described fan arranges regulated valve, according to desulfurizing iron regulating working conditions blast intensity.
Described fan sends into cleaned air or non-oxidizing gas in sweetening agent elephant trunk.
Save the application of the Desulfuring Device of Hot Metal of sweetening agent, fan sends into cleaned air or non-oxidizing gas in sweetening agent elephant trunk, sweetening agent feed bin carries sweetening agent in sweetening agent elephant trunk, gas and desulphurizer mixing also form the Dual-Phrase Distribution of Gas olid rotating fluid of low speed through eddy flow assembly, Dual-Phrase Distribution of Gas olid rotating fluid fully contacts with the molten iron being in rotating state, and sweetening agent is effectively absorbed by molten iron.
About 500mm place on the liquid level that movable pipe extend into the molten iron of splendid attire in hot metal ladle.
Compared with prior art, the present invention has the following advantages:
(1) substantially avoided hot gas flow the sweeping along the sweetening agent fallen of rising from molten iron surface, and the Dual-Phrase Distribution of Gas olid eddy flow face containing sweetening agent is large more than 11 times of the patent of 201080029394.3 than above-mentioned application number, sweetening agent by molten iron sooner and more effectively absorb, thus can greatly reduce the consumption of sweetening agent and the load of cleaning apparatus.
(2) because delivering gas is slow rotating fluid, delivering gas can not go deep in molten iron, thus to avoid in delivering gas moisture to iron water mitigation, therefore can cleaned air be adopted but not other non-oxidizing gas as delivering gas, desulphurization cost reduces.
(3) the eddy flow assembly adopted also can disperse the sweetening agent in gas fully, and has no special requirements to sweetening agent granularity, avoids the conglomerate of sweetening agent on molten iron surface, improves desulfurization rate.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is the structural representation of eddy flow assembly.
In figure, 1-agitator, 2-hot metal ladle, 3-extraction hood, 4-sweetening agent feed bin, 5-fixed tube, 6-movable pipe, 7-blast tube, 8-fan, 9-regulated valve, 10-eddy flow assembly.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
Embodiment
A kind of Desulfuring Device of Hot Metal saving sweetening agent, its structure as shown in Figure 1, be positioned at be loaded with molten iron hot metal ladle 2 above, comprise the sweetening agent elephant trunk combined by fixed tube 5 and movable pipe 6, internal diameter >=the 250mm of fixed tube 5, the internal diameter 400mm of movable pipe 6, mutually nestedly defines sweetening agent elephant trunk, and movable pipe 6 can move up and down.Also comprise the sweetening agent feed bin 4 be communicated with fixed tube 5 in addition, the fan 8 be connected with fixed tube 5 by blast tube 7.The import of fan 8 arranges regulated valve 9, according to desulfurizing iron regulating working conditions blast intensity, in sweetening agent elephant trunk, sends into cleaned air or non-oxidizing gas.
Eddy flow assembly 10 is provided with near its exit in movable pipe 6, its structure as shown in Figure 2, eddy flow assembly 10 is made up of core pipe and the several swirl vanes be connected to outside core pipe, swirl vane is distorted shape, with the installation angle 30 ° of core pipe inside it, with the installation angle 60 ° of movable pipe inwall outside it, the swirling eddy speed making it export adapts with the speed of rotation in molten iron face on the basis of hot gas flow overcoming rising.Adopt the air velocity distribution in computer fluid simulation technical modelling movable pipe, understand the distribution situation of gas velocity, pressure and the temperature in flow field, the distortion radius of appropriate design swirl vane and installation angle and quantity on this basis, to make in movable pipe swirl velocity out reach about 20m/s, thus adapt with the speed of rotation of molten iron face about 15 ~ 25m/s.
During desulfurizing iron, open fan 8, movable pipe 6 move down and close to molten iron surface, the sweetening agent that sweetening agent feed bin 4 stores and unslaked lime enter unslaked lime elephant trunk fixed tube 5, then movable pipe 6 is entered, gas and desulphurizer mixing also form the Dual-Phrase Distribution of Gas olid rotating fluid of low speed through eddy flow assembly, from movable pipe 6 Dual-Phrase Distribution of Gas olid fluid out with eddy flow state to molten iron surface, molten iron stirs through agitator 1, and the gas-liquid two-phase fluid of eddy flow state and the molten iron of rotation merge and remove the objectionable impurities in molten iron---sulphur.Regulate the speed of rotation of the adjustable Dual-Phrase Distribution of Gas olid of aperture of the valve 9 of fan 8 import.The extraction hood 3 facilitating flue gas to discharge also is provided with above hot metal ladle 2.
Said apparatus is tested on 180t steel-making converter desulfurization station, adjustable in fan air quantity 3000 ~ 6000m3/h, 180t hot metal ladle liquid level radius 1750mm, movable pipe center is to hot metal ladle width between centers 1167mm, two phase flow outer ring speed of rotation 20m/s out in movable pipe, the linear velocity 20m/s that the molten iron on molten iron surface, movable pipe central position rotates.In the case, the consumption of lime drops to 9.5kg by former molten iron 11kg per ton.
Claims (8)
1. save a Desulfuring Device of Hot Metal for sweetening agent, be positioned at be loaded with molten iron hot metal ladle above, it is characterized in that, this device comprises:
The sweetening agent elephant trunk combined by fixed tube and movable pipe, is provided with eddy flow assembly in described movable pipe,
The sweetening agent feed bin be communicated with fixed tube,
By the fan that blast tube is connected with fixed tube.
2. a kind of Desulfuring Device of Hot Metal saving sweetening agent according to claim 1, is characterized in that, described eddy flow assembly is positioned at movable pipe near its exit.
3. a kind of Desulfuring Device of Hot Metal saving sweetening agent according to claim 1, it is characterized in that, described eddy flow assembly is made up of core pipe and the several swirl vanes be connected to outside core pipe, swirl vane is distorted shape, with the installation angle 30 ° ~ 45 ° of core pipe inside it, with the installation angle 45 ° ~ 75 ° of movable pipe inwall outside it, the speed of rotation in swirl velocity out and molten iron face is made in movable pipe to adapt.
4. a kind of Desulfuring Device of Hot Metal saving sweetening agent according to claim 1, is characterized in that, the internal diameter >=250mm of described fixed tube, the internal diameter >=350mm of movable pipe.
5. a kind of Desulfuring Device of Hot Metal saving sweetening agent according to claim 1, it is characterized in that, the import of described fan arranges regulated valve, according to desulfurizing iron regulating working conditions blast intensity.
6. a kind of Desulfuring Device of Hot Metal saving sweetening agent according to claim 1, is characterized in that, described fan sends into cleaned air or non-oxidizing gas in sweetening agent elephant trunk.
7. application of saving the Desulfuring Device of Hot Metal of sweetening agent as claimed in claim 1, it is characterized in that, fan sends into cleaned air or non-oxidizing gas in sweetening agent elephant trunk, sweetening agent feed bin carries sweetening agent in sweetening agent elephant trunk, gas and desulphurizer mixing also form the Dual-Phrase Distribution of Gas olid rotating fluid of low speed through eddy flow assembly, Dual-Phrase Distribution of Gas olid rotating fluid fully contacts with the molten iron being in rotating state, and sweetening agent is effectively absorbed by molten iron.
8. a kind of application of saving the Desulfuring Device of Hot Metal of sweetening agent according to claim 7, is characterized in that, movable pipe extend into the above 500mm place of liquid level of the molten iron of splendid attire in hot metal ladle.
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| Application Number | Priority Date | Filing Date | Title |
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| 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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| 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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| CN104928440B CN104928440B (en) | 2017-05-10 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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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| CN2371196Y (en) * | 1999-05-27 | 2000-03-29 | 刘东业 | Equipment for desulfurating of molten iron by single blasting gasified granular magnesium |
| 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 |
| JP2011042865A (en) * | 2009-03-11 | 2011-03-03 | Jfe Steel Corp | Method of desulfurizing molten iron |
| KR101053418B1 (en) * | 2008-12-12 | 2011-08-01 | 주식회사 포스코 | Melting Ladle |
| CN102471814A (en) * | 2009-06-30 | 2012-05-23 | 杰富意钢铁株式会社 | Method of desulfurization 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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2015
- 2015-07-20 CN CN201510427173.6A patent/CN104928440B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| JP2011042865A (en) * | 2009-03-11 | 2011-03-03 | Jfe Steel Corp | Method of desulfurizing molten iron |
| 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 |
| CN102471814A (en) * | 2009-06-30 | 2012-05-23 | 杰富意钢铁株式会社 | Method of desulfurization 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 |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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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| CN104928440B (en) | 2017-05-10 |
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