CN101934283B - Dust suppression device and dust suppression method during molten iron open-air transportation - Google Patents
Dust suppression device and dust suppression method during molten iron open-air transportation Download PDFInfo
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- CN101934283B CN101934283B CN2010102864363A CN201010286436A CN101934283B CN 101934283 B CN101934283 B CN 101934283B CN 2010102864363 A CN2010102864363 A CN 2010102864363A CN 201010286436 A CN201010286436 A CN 201010286436A CN 101934283 B CN101934283 B CN 101934283B
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Abstract
The invention discloses dust suppression device and dust suppression method during molten iron open-air transportation. The dust suppression device comprises an inert gas nozzle and a gas supply device, wherein the gas supply device is used for supplying pressure inert gas for the inert gas nozzle, and the inert gas nozzle is distributed at the upper part of a molten iron transportation port over against is a molten iron open-air flowing region; the inert gas nozzle structure is adopted by the invention, the air in the molten iron transportation region is isolated or blown away by the inert gas, so that the open-air molten iron in the molten iron transportation region can not be oxidized by the oxygen in the air, and the generation of iron oxide grains is reduced and even eliminated, thereby reducing the generation of smoke and dust and having better dust suppression effect; because of the reduction of the smoke and the dust, the power consumption and the maintenance and repair cost of a dust collecting system are lowered; meanwhile, because the generation of the iron oxide grains is reduced and even eliminated, the metal yield of the molten iron is improved, and the production cost is lowered; the device of the invention has the advantages of simple structure and low manufacturing and installation cost; and because the inert gas is easily obtained for an iron and steel enterprise, the operating cost is relatively lower.
Description
Technical field
The present invention relates to a kind of molten iron transhipment environmental protecting device, particularly a kind of apparatus and method that the flue dust that produces in the molten iron transport process is suppressed.
Background technology
In the smelting iron and steel technology, need carry out the transhipment of tank switching formula to molten iron, such as blast furnace discharge yard, molten iron flows into torpedo tank car from blast furnace through iron runner; The converter hot metal charging, molten iron flows into converter from ladle; Similarly process also has processes such as mixed iron blast hot metal charging, molten iron tank switching.High temperature liquid iron directly contacts with air in these processes, and airborne oxygen and molten iron generation chemical reaction produce the flue dust that is rich in ferric oxide particles in a large number, have both polluted the production operation environment in iron and steel workshop, have reduced recovery rate of iron again.
In the prior art, the iron and steel workshop mainly is through fume trap cover dusty gas to be collected for the dust treatment measure of transporting generation owing to molten iron in the open, through discharging to atmospheric environment behind filter or the smoke and dust purifier, to satisfy environmental requirement.Though above-mentioned measure can the sucking-off flue dust, these dust pelletizing system initial outlaies are higher, account for 4% of gross investment like the dust pelletizing system of blast furnace; And the operation of dust pelletizing system needs higher operating cost, comprises power, maintenance and repair cost or the like; Particularly, this dedusting method can reduce the recovery rate of iron of molten iron relatively, causes the increase of production cost.
Therefore; Need a kind of technology that the flue dust that produces in the open-air transport process of molten iron is suppressed, simple in structure, small investment; And effectively stop airborne oxygen that the molten iron in the transport process is carried out oxidation; Reduce the generation of ferric oxide particles, the flue dust from mechanism inhibition molten iron transshipment area is beneficial to environmental protection; Simultaneously, reduce the investment of dust pelletizing system greatly, improve the recovery rate of iron of molten iron, reduce production costs.
Summary of the invention
In view of this; The purpose of this invention is to provide a kind of molten iron and transport dust-arrest device and dust-suppression method in the open, apparatus structure is simple, small investment; Can effectively stop airborne oxygen that the molten iron in the transport process is carried out oxidation in the use; Thereby reduce the generation of ferric oxide particles as far as possible, thereby reduce the flue dust of molten iron transshipment area, be beneficial to environmental protection; Simultaneously, improve the recovery rate of iron of molten iron, reduce production costs.
Molten iron of the present invention is transported dust-arrest device in the open, comprises inert gas nozzle and for inert gas nozzle provides the feeder of pressure inert gas, said inert gas nozzle is flowed through area distribution in the open in a molten iron transhipment mouthful top over against molten iron.
Further, also comprise outer the flow through dust excluding hood on regional top of molten iron that covers in the open, said inert gas nozzle is fixedly set in dust excluding hood;
Further, said inert gas nozzle is distributed in the dust excluding hood upper opening portion side by side and extends the dust excluding hood that opening forms the air curtain structure;
Further, said dust excluding hood setting is communicated in the suction port of smoke dust collector;
Further, the said molten iron zone of flowing through in the open is meant that blast furnace discharge yard, converter hot metal charging, molten iron flow into the molten iron open-air area that converter, mixed iron blast hot metal charging or molten iron tank switching produce from ladle.
The invention also discloses a kind of dust-suppression method that utilizes molten iron to transport dust-arrest device in the open, may further comprise the steps:
A. before implementing the open-air transhipment of molten iron, open inert gas nozzle, molten iron is transported the zone of flowing through purged at least one minute, inert gas pressure is 0.2MPa～0.4 MPa, flow 10000～50000 Nm
3/ h is used to reduce molten iron and transports flow through zone and near zone oxygen concentration thereof;
B. begin to carry out molten iron and transport in the open, inert gas pressure is 0.2MPa～0.4 MPa, flow 10000～50000 Nm
3/ h transports end in the open until molten iron, closes inert gas nozzle.
Further, among the step a, adopt the dust excluding hood of the air curtain structure that forms jointly by inert gas nozzle and dust excluding hood to cover in molten iron outward and transport the zone of flowing through;
Further, among step a and the step b, the inert gas spouting velocity of inert gas nozzle is 10～40 m/s.
The invention has the beneficial effects as follows: molten iron of the present invention is transported dust-arrest device and dust-suppression method in the open; Adopt the inert gas nozzle structure, isolate the air that perhaps blows away the molten iron transshipment area, reduce the oxygen concentration on open-air molten iron surface through inert gas; The open-air molten iron that makes the molten iron transshipment area is not by the oxidation of airborne oxygen institute; Reduce even eliminate the generation of ferric oxide particles, thereby reduce the generation of flue dust, have anti-dust effect preferably; Since the minimizing of flue dust, initial outlay, power consumption and the maintenance and repair cost of reduction dust collecting system; Simultaneously,, improve the recovery rate of iron of molten iron, reduce production costs owing to reduce even eliminate the generation of ferric oxide particles; Apparatus structure of the present invention is simple, and manufacturing and installation cost are low, because inert gas is easy to acquisition for iron and steel enterprise, thereby operating cost is relatively low.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the present invention is further described.
Fig. 1 is a structural representation of the present invention.
The specific embodiment
Fig. 1 is a structural representation of the present invention; As shown in the figure: the molten iron of present embodiment is transported dust-arrest device in the open; Comprise inert gas nozzle 1 and for inert gas nozzle 1 provides the feeder of pressure inert gas, said inert gas nozzle is distributed in a molten iron transhipment mouthful top over against the molten iron zone 5 of flowing through in the open.
In the present embodiment, also comprise outer the flow through dust excluding hood 2 on regional 5 tops of molten iron that covers in the open, said inert gas nozzle 1 is fixedly set in dust excluding hood 2; Adopt dust excluding hood 2 structures, make molten iron regional 5 relative closures of flowing through in the open, can obviously reduce the inert gas consumption, and be beneficial to and in cover, produce enough malleations, avoid outside air to get into, the raising anti-dust effect.
In the present embodiment, said inert gas nozzle 1 is distributed in dust excluding hood 2 upper opening portions side by side and extends the dust excluding hood that opening forms the air curtain structure; Adopt inert gas air curtain structure, further make the space that forms inert gas seal in the cover, prevent that ambient atmos from getting into, and avoids molten iron oxidized.
In the present embodiment, said dust excluding hood 2 is provided with the suction port 3 that is communicated in smoke dust collector, siphons away other flue dust of generation, keeps the cleaning of Production Regional.
The molten iron of the present invention zone 5 of flowing through in the open is meant that blast furnace discharge yard, converter hot metal charging, molten iron flow into the molten iron open-air area that converter, mixed iron blast hot metal charging or molten iron tank switching produce from ladle; Be meant the molten iron open-air area that produces in the mixed iron blast hot metal charging process in the present embodiment; Present embodiment is that molten iron flows through regional 5 in the open from the ladle inflow molten iron that converter produced.
The molten iron that utilizes of present embodiment is transported the dust-suppression method of dust-arrest device in the open, may further comprise the steps:
A. before implementing the open-air transhipment of molten iron, open inert gas nozzle 1, molten iron is transported the zone 5 of flowing through purged at least one minute, inert gas pressure is 0.2MPa～0.4 MPa, flow 10000～50000 Nm
3/ h adjusts according to demand, is used to reduce molten iron and transports flow through zone 5 and near zone oxygen concentration thereof;
B. begin to carry out molten iron and transport in the open, inert gas pressure is 0.2MPa～0.4 MPa, flow 10000～50000 Nm
3/ h transports end in the open until molten iron, closes inert gas nozzle 1.
In the present embodiment, among the step a, adopt the dust excluding hood of the air curtain structures that form jointly by inert gas nozzle 1 and dust excluding hood 2 to cover in the molten iron transhipment outward and flow through regional 5.
In the present embodiment; Among step a and the step b, the inert gas spouting velocity of inert gas nozzle 1 is 10～40 m/s, adjusts according to actual needs to guarantee to blow away and air-isolation and molten iron; Prevent low excessively respective action, the perhaps too high generation suck-back of the flow velocity effect of not having of flow velocity.
In the practice, adjust as the case may be for the use of apparatus of the present invention, such as: for converter hot metal charging process, can not use dust excluding hood, directly blown inert gas carried out in the molten iron open-air area, reach anti-dust effect; And, use the common air curtain structure that forms of inert gas nozzle and dust excluding hood for mixed iron blast hot metal charging process, have better anti-dust effect.
Explanation is at last; Above embodiment is only unrestricted in order to technical scheme of the present invention to be described; Although with reference to preferred embodiment the present invention is specified, those of ordinary skill in the art should be appreciated that and can make amendment to technical scheme of the present invention or/and be equal to replacement; And not breaking away from the aim and the scope of technical scheme of the present invention, it all should be encompassed in the middle of the claim scope of the present invention.
Claims (7)
1. a molten iron is transported dust-arrest device in the open; It is characterized in that: comprise inert gas nozzle and the feeder of pressure inert gas is provided for inert gas nozzle; Said inert gas nozzle is flowed through area distribution in the open in molten iron transhipment mouthful top over against molten iron; Also comprise outer the flow through dust excluding hood on regional top of molten iron that covers in the open, said inert gas nozzle is fixedly set in dust excluding hood.
2. molten iron according to claim 1 is transported dust-arrest device in the open, it is characterized in that: said inert gas nozzle is distributed in the dust excluding hood upper opening portion side by side and extends the dust excluding hood that opening forms the air curtain structure.
3. molten iron according to claim 2 is transported dust-arrest device in the open, it is characterized in that: said dust excluding hood setting is communicated in the suction port of smoke dust collector.
4. molten iron according to claim 3 is transported dust-arrest device in the open, it is characterized in that: the said molten iron zone of flowing through in the open is meant that blast furnace discharge yard, converter hot metal charging, molten iron flow into the molten iron open-air area that converter, mixed iron blast hot metal charging or molten iron tank switching produce from ladle.
5. dust-suppression method that utilizes the described molten iron of claim 1 to transport dust-arrest device in the open is characterized in that: may further comprise the steps:
A. before implementing the open-air transhipment of molten iron, open inert gas nozzle, molten iron is transported the zone of flowing through purged at least one minute, inert gas pressure is 0.2MPa～0.4 MPa, flow 10000～50000 Nm
3/ h is used to reduce molten iron and transports flow through zone and near zone oxygen concentration thereof;
B. begin to carry out molten iron and transport in the open, inert gas pressure is 0.2MPa～0.4 MPa, flow 10000～50000 Nm
3/ h transports end in the open until molten iron, closes inert gas nozzle.
6. molten iron according to claim 5 is transported the dust-suppression method of dust-arrest device in the open, it is characterized in that: among the step a, adopt the dust excluding hood of the air curtain structure that is formed jointly by inert gas nozzle and dust excluding hood to cover in molten iron outward and transport the zone of flowing through.
7. molten iron according to claim 6 is transported the dust-suppression method of dust-arrest device in the open, it is characterized in that: among step a and the step b, the inert gas spouting velocity of inert gas nozzle is 10～40 m/s.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102864363A CN101934283B (en) | 2010-09-19 | 2010-09-19 | Dust suppression device and dust suppression method during molten iron open-air transportation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102864363A CN101934283B (en) | 2010-09-19 | 2010-09-19 | Dust suppression device and dust suppression method during molten iron open-air transportation |
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| Publication Number | Publication Date |
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| CN101934283A CN101934283A (en) | 2011-01-05 |
| CN101934283B true CN101934283B (en) | 2012-02-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2010102864363A Expired - Fee Related CN101934283B (en) | 2010-09-19 | 2010-09-19 | Dust suppression device and dust suppression method during molten iron open-air transportation |
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Families Citing this family (1)
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| CN112872344A (en) * | 2021-01-07 | 2021-06-01 | 联峰钢铁（张家港）有限公司 | Molten iron car is covered and is inhaled cigarette dust pelletizing system |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5973173A (en) * | 1982-10-19 | 1984-04-25 | Kawasaki Steel Corp | Method and device for raising of molten steel |
| DE3933894A1 (en) * | 1989-02-06 | 1991-04-18 | Kloeckner Stahl Gmbh | Appts. to prevent flue gas formation in metallurgical process |
| DE4033482C1 (en) * | 1990-10-20 | 1992-02-20 | Kloeckner Stahl Gmbh, 4100 Duisburg, De | |
| JPH06158139A (en) * | 1992-11-25 | 1994-06-07 | Nippon Steel Corp | Method for preventing fuming at the time of charging molten iron |
| CN2928313Y (en) * | 2006-07-21 | 2007-08-01 | 江苏兴利来特钢有限公司 | Continuous casting device for thin plate blank |
| CN100507016C (en) * | 2006-12-08 | 2009-07-01 | 邢台钢铁有限责任公司 | Air curtain skimming device for steel-making converter |
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