CN101967532A - Powder spraying device and method for efficient vanadium extracting process of converter - Google Patents
Powder spraying device and method for efficient vanadium extracting process of converter Download PDFInfo
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- CN101967532A CN101967532A CN 201010541453 CN201010541453A CN101967532A CN 101967532 A CN101967532 A CN 101967532A CN 201010541453 CN201010541453 CN 201010541453 CN 201010541453 A CN201010541453 A CN 201010541453A CN 101967532 A CN101967532 A CN 101967532A
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Abstract
The invention discloses a powder spraying device and a powder spraying method for an efficient vanadium extracting process of a converter, belongs to the technical field of metallurgy, and aims to solve the technical problems of poor dynamical condition, low oxidation conversion rate of vanadium and the like in the vanadium extracting process of the converter. The device comprises a powder spraying tank system, a PLC (programmable logic controller) control system, a gas adjusting valve set and a powder spraying gun. The powder spraying rate is accurately and continuously controlled by adjusting the frequency of a rotary feeding tray motor, the powder spraying gun has a double-sleeve structure, carrier gas powder spraying is adopted in a central pipe, meanwhile, auxiliary blowing gas ensures continuous operation of the powder spraying process, and circular seam blowing protective gas protects the powder spraying gun. The powder spraying gun is arranged on the side or the bottom of the vanadium extracting converter, and protective sleeve bricks are embedded around the powder spraying gun. The device is suitable for the vanadium extracting converter of 10 to 200 tons, can spray 50 to 200kg/min iron concentrate powder in the vanadium extracting process of the converter, improve the dynamical and thermodynamic conditions of vanadium extraction of the converter, reduce the content of half steel vanadium to be less than 0.03 percent and improve the content of vanadium slag (V2O5) by 2 to 5 percent, meanwhile, is favorable for shortening the vanadium extracting smelting period of the converter, and realizes efficient vanadium extraction of the converter.
Description
Technical field
The present invention relates to a kind of powder-spraying metallurgical device and method, adopt a cover powder spraying system specifically, the smart powder of vanadium iron is sprayed into the vanadium extraction device and method that dusts that converter extracting vanadium carries out efficient vanadium extraction as refrigerant, belong to metallurgical technology field.
Background technology
At present, process for extracting vanadium is based on vanadium extraction by converter blowing both at home and abroad, the vanadium conversion rate of oxidation that vanadium extraction by converter blowing will be realized ideal, obtain the surplus carbon of high as far as possible half steel and superheating temperature, make targets such as vanadium slag quality is effectively controlled, the vanadium extraction by converter blowing blowing cycle is the shortest simultaneously, key is to get hold of the temperature control of vanadium extraction process converter molten pool and good molten bath stirring capacity is provided, for good kinetics and thermodynamic condition are created in efficient vanadium extraction.But the vanadium extraction by converter blowing process is because temperature is low, reaction between carbon and oxygen is suppressed, v element content only is 0.3%～0.4% in the molten iron simultaneously, therefore the speed of response and the degree of v element limited by mass transfer velocity in the vanadium extraction process, both prolonged duration of blast, reduce the rate of recovery of vanadium again, the melt tank reaction dynamic conditions is poor, causes TFe content height in surplus vanadium of half steel and the slag; Simultaneously, the vanadium extraction process requires very strict to bath temperature, present stage is mainly carried out temperature control by adding block refrigerants such as pig iron containing vanadium piece, iron ore and ferric oxide ball, but block refrigerant can't Sustainable Control vanadium extraction by converter blowing process temperature, make the part, molten bath be easy to generate extremely cold very hot phenomenon, be unfavorable for that the vanadium extraction successful reaction carries out.Therefore, if can improve the thermodynamics and kinetics condition of melt tank reaction, will the key technical indexes of vanadium extraction by converter blowing be optimized.
Summary of the invention
The objective of the invention is to utilize a cover powder spraying system, adopt carrier gas that the smart powder of vanadium iron is sprayed in the vanadium extraction molten iron by powder monitor, effectively control vanadium extraction by converter blowing process bath temperature, strengthen the molten bath stirring capacity, for good thermodynamics and kinetics condition is created in the vanadium extraction by converter blowing reaction, improve the conversion rate of oxidation and the v slag grade of vanadium, shorten the vanadium extraction by converter blowing smelting cycle simultaneously.
A kind of dusting device that is used for the efficient vanadium extraction process of converter is characterized in that comprising that storage bin, vibrator, last charging valve, following charging valve, powder jar, pressure unit, pressurizing valve, vent valve, LOAD CELLS, fluidisation valve, master blow valve, rotary feeding plate and motor, bleeder valve, help and blow valve, powder feed channel, auxilliary gassing pipe, circumferential weld feed channel and powder monitor.Be connected by upper and lower charging valve between storage bin and the powder jar, storage bin adopts overhead traveling crane or feed belt to feed in raw material, when the powder jar feeds in raw material, open vent valve, following charging valve successively, go up charging valve, vibrator, powder weight can be provided with bound according to the needs of powder tank volume size and converter winding-up in the powder jar.
Powder jar bottom adopts bleeder valve to connect powder can container and powder feed channel, and discharging speed adopts rotary feeding plate control, can accurately control the speed of dusting by regulating the delivery plate electric machine frequency, satisfies the needs that add refrigerant in the extraction smelting of vanadium process.
Dust when smelting, open pressurizing valve successively, help and blow valve, bleeder valve, main valve and the fluidisation valve of blowing, each pipeline gas flow all adopts pneumatic adjusting valve control, and the control of powder spraying system and adjusting adopt the Wincc program to realize the automatic control of operating process all by the PLC Controlling System.
The gas trap assembly is equipped with ups power, use in the time of can cutting off the power supply for the scene, guarantee the normal unlatching of circumferential weld gas, auxilliary air blowing and the carrier gas valve that dusts, preventing that outage suddenly from causing that closed electromagnetic valve interrupts air feed, manually opened then circumferential weld gas, auxilliary air blowing and carrier gas are at the bypass manually-operated gate at valve group place.The omnibus bar that pneumavalve and nitrogengas cylinder form is communicated with, in order to the unlatching use of dying suddenly or bleed pressure is crossed magnetic valve and variable valve when low.
It is two telescoping spray guns that the present invention adopts powder monitor, internal diameter 5～32mm, and the wide 0.5～3.0mm of circumferential weld, pipe core input powder air-flow, circumferential weld blows protection gas, and the powder monitor end is blown into the auxilliary protection spray gun of blowing.Powder monitor passes the positive center of gudgeon to the converter furnace wall, utilizes the swivel joint and the location of the gim peg on the furnace wall and fixing in the gudgeon outside.Powder monitor can be installed in 100～700mm place under the bath surface of furnace side, with the liquid level angle be 0～30 °, become 30 °～150 ° angular range with mounting points section, furnace wall; Also can be installed on the 0.4D～0.7D circumferential position of converter bottom, vertical with the furnace bottom plane.
The carrier gas of dusting can be selected oxygen, nitrogen, air, carbonic acid gas or argon gas for use, and auxilliary blowing protects gas identical with the carrier gas of dusting, and circumferential weld gas can be selected nitrogen, air, carbonic acid gas or argon gas for use.The flow that dusts is 50～200kg/min, and the time of dusting determines that according to the needs of vanadium extraction by converter blowing smelting process carrier gas flux is 100～500Nm
3/ h, pressure are 0.2～0.8MPa; Auxilliary air blowing flow is 80～500Nm
3/ h, pressure are 0.2～0.8MPa; The circumferential weld airshed is 100～400Nm
3/ h, pressure are 0.4～1.0MPa.
The powder requirement particle diameter that dusts is not more than 2mm, and moisture content is less than 0.5%, and the flow velocity of gas must be greater than the critical fluidization velocity of powder in the powder feed channel.
The present invention is applicable to 10～200 tons of vanadium extraction by converter blowing smelting technologyes, utilizes carrier gas that the smart powder of iron is sprayed in the converter, has improved the kinetics and the thermodynamic condition of vanadium extraction by converter blowing, improves the conversion rate of oxidation of vanadium, the half steel content of vanadium is reduced to below 0.03%, vanadium slag (V
2O
5) content raising 2%～5%, reduce the vanadium resource waste, help shortening the vanadium extraction by converter blowing smelting cycle simultaneously, reduce the refrigerant add-on, reduce the vanadium extraction by converter blowing smelting cost, the raising vanadium resource utilizes the rate of recovery, has remarkable economic efficiency.
The present invention also is applicable to 30～300 tons of steel-making converter winding-up lime powders, can reduce a ton steel lime adding amount, and the smelting of high phosphorus hot metal and the production of ultra-low phosphoretic steel are had the reference reference value.
Description of drawings
Fig. 1 constitutes and the technology interface chart for dusting device of the present invention,
Fig. 2 is the powder monitor synoptic diagram,
Fig. 3 arranges synoptic diagram for powder monitor,
Fig. 4 is the A-A diagram of Fig. 3.
Among Fig. 1,1. storage bin, 2. vibrator is 3. gone up charging valve, 4. descend charging valve, 5. powder jar, 6. pressure unit, 7. pressurizing valve, 8. vent valve, 9. LOAD CELLS, 10. fluidisation valve, 11. the master blows valve, 12. rotary feeding plates and motor, 13. bleeder valves, blow valve 14. help, 15. powder feed channel, 16. auxilliary gassing pipes, 17. the circumferential weld feed channel, 18. powder monitors, 19. converter extracting vanadiums.
Embodiment
For 150 tons of converter extracting vanadiums, choose powder monitor inside diameter D 1 and be 25mm, the wide D2 of circumferential weld is 1.5mm.Powder monitor is installed in 300mm place under the liquid level, with liquid level angle α be 15 °, become 60 ° with the installation angle β in mounting points section, furnace wall, the smelting process of dusting adopts N
2As carrier gas and protection gas.
Dusting operation control process: 1. open pressurizing valve 7, increase tank pressure to 0.50～0.55MPa; 2. regulate carrier gas flux; 3. open bleeder valve 13; 4. opening fluidisation valve 10 adjusting fluidisation pressure is 0.50MPa.
Charge period: nitrogen blowing protection powder monitor during dress steel scrap hot metal charging, auxilliary air blowing flow 200～300Nm
3/ h, carrier gas flux are 100Nm
3/ h, the circumferential weld airshed is 150～200Nm
3/ h.
Smelt early stage: the preceding 30 seconds nitrogen blowing protection powder monitors that blow, flow is identical with charge period, helps the initial stage molten iron and heats up.Begin to dust after 30 seconds, the flow that dusts is 80～120kg/min, and carrier gas flux is 200～300Nm
3/ h, auxilliary air blowing flow is 80～100Nm
3/ h, the circumferential weld airshed is 150～200Nm
3/ h.
Smelt mid-term: the flow that dusts is adjusted into 80～150kg/min according to the converter extracting vanadium bath temperature, and carrier gas flux is 200～300Nm
3/ h, auxilliary air blowing flow is 80～100Nm
3/ h, the circumferential weld airshed is 150～200Nm
3/ h, the dust flow and dusting the time of adjustment according to bath temperature.
Smelt the later stage: content of vanadium has been reduced to lower level in the molten bath, should reduce the flow to 50 that dusts～60kg/min, and carrier gas flux is 150～200Nm
3/ h, auxilliary air blowing flow is 80～100Nm
3/ h, the circumferential weld airshed is 150～200Nm
3/ h.1min stops to dust before the finishing blowing, nitrogen blowing protection spray gun, and gas flow is identical with charge period; thereby TFe content in the reduction slag; improve v slag grade, improve the half steel superheating temperature simultaneously and help the separation of slag iron, determine the half steel time according to final content of vanadium and bath temperature.
Tapping: go out half steel process nitrogen blowing protection powder monitor, auxilliary air blowing flow 200～300Nm
3/ h, carrier gas flux are 100Nm
3/ h, the circumferential weld airshed is 150～200Nm
3/ h.
Claims (3)
1. a dusting device that is used for the efficient vanadium extraction process of converter is characterized in that comprising that storage bin (1), vibrator (2), last charging valve (3), following charging valve (4), powder jar (5), pressure unit (6), pressurizing valve (7), vent valve (8), LOAD CELLS (9), fluidisation valve (10), master blow valve (11), rotary feeding plate and motor (12), bleeder valve (13), help and blow valve (14), powder feed channel (15), auxilliary gassing pipe (16), circumferential weld feed channel (17) and powder monitor (18); Storage bin (1) sidewall is equipped with vibrator (2), and storage bin is connected with powder jar (5) by last charging valve (3), following charging valve (4); Powder jar (5) top is provided with pressure unit (6), pressurizing valve (7) and vent valve (8), and powder jar (5) sidewall is equipped with LOAD CELLS (9), and the bottom is provided with fluidisation valve (10); Powder jar (5) bottom is connected with powder feed channel (15) by rotary feeding plate (12), bleeder valve (13), powder monitor (18) is provided with powder feed channel (15), auxilliary gassing pipe (16) and circumferential weld feed channel (17), and powder monitor (18) blows valve (14) and is connected with bleeder valve (13) with helping by powder feed channel (15).
2. a spraying powder method that is used for the efficient vanadium extraction process of converter is characterized in that adopting the described dusting device of claim 1, and the discharging process of dusting adopts rotary feeding plate (12) control, can accurately control the speed of dusting by regulating the delivery plate electric machine frequency; Powder monitor (18) adopts two telescoping spray guns, and pipe core input powder air-flow, powder monitor end blow the auxilliary protection powder monitor of blowing; Powder monitor inside diameter D 1 is 5～32mm, the powder monitor circumferential weld blows protection gas, and the wide D2 of circumferential weld is 0.5～3.0mm, and powder monitor (18) is installed in 100～700mm place under the bath surface of furnace side, with liquid level angle α be 0～30 °, become 30 °～150 ° installation angle β with mounting points section, furnace wall; Or be installed on the 0.4D～0.7D circumferential position of converter bottom, vertical with the furnace bottom plane.
3. according to the described a kind of spraying powder method that is used for the efficient vanadium extraction process of converter of claim 2, oxygen, nitrogen, air, carbonic acid gas or argon gas are selected in the carrier gas that it is characterized in that dusting for use, auxilliary air blowing is selected with a kind of gas with carrier gas, and circumferential weld gas is selected nitrogen, air, carbonic acid gas or argon gas for use; Whole winding-up process adopts the Wincc time variable control, and this method is applicable to 10～200 tons of converter extracting vanadiums, and the flow that dusts is 50～200kg/min, and carrier gas flux is 100～500Nm
3/ h, pressure are 0.2～0.8MPa; Auxilliary air blowing flow is 80～500Nm
3/ h, pressure are 0.2～0.8MPa; The circumferential weld airshed is 100～400Nm
3/ h, pressure are 0.4～1.0MPa.
Priority Applications (1)
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|---|---|---|---|
| CN201010541453A CN101967532B (en) | 2010-11-11 | 2010-11-11 | Powder spraying device and method for efficient vanadium extracting process of converter |
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|---|---|---|---|
| CN201010541453A CN101967532B (en) | 2010-11-11 | 2010-11-11 | Powder spraying device and method for efficient vanadium extracting process of converter |
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| Publication Number | Publication Date |
|---|---|
| CN101967532A true CN101967532A (en) | 2011-02-09 |
| CN101967532B CN101967532B (en) | 2011-12-21 |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102660659A (en) * | 2012-04-20 | 2012-09-12 | 北京科技大学 | Converter vanadium extraction process adopting top blowing oxygen lance to blow cooling agents |
| CN104437923A (en) * | 2014-11-25 | 2015-03-25 | 钢铁研究总院 | Automatic powder spraying device |
| CN106048136A (en) * | 2016-07-27 | 2016-10-26 | 北京科技大学 | Online steelmaking tapping process powder injection deoxidizing method and system |
| CN109306392A (en) * | 2017-07-27 | 2019-02-05 | 佟萌 | A kind of use for refining molten steel air-flow dusts element with spray formula Ladle Bottom |
| CN109487035A (en) * | 2019-01-15 | 2019-03-19 | 山东钢铁股份有限公司 | A kind of blowing device |
| CN110157854A (en) * | 2019-06-04 | 2019-08-23 | 甘肃酒钢集团宏兴钢铁股份有限公司 | A method of the deoxidation of molten steel alloying in converter |
| CN110553510A (en) * | 2019-09-30 | 2019-12-10 | 龙森洁(厦门)环保科技有限公司 | Efficient powder sprayer and working method thereof |
| CN111363885A (en) * | 2020-04-09 | 2020-07-03 | 苏州大学 | Method for treating stainless steel dedusting ash by using electric arc furnace |
| CN111411231A (en) * | 2020-05-20 | 2020-07-14 | 攀钢集团北海特种铁合金有限公司 | Automatic blowing and spraying device for ferrovanadium refining |
| CN112410498A (en) * | 2020-11-19 | 2021-02-26 | 攀钢集团攀枝花钢铁研究院有限公司 | Production method for extracting vanadium by spraying powder at bottom of converter |
| CN112410497A (en) * | 2020-11-19 | 2021-02-26 | 攀钢集团攀枝花钢铁研究院有限公司 | Production method for extracting vanadium by composite powder injection at top and bottom of converter |
| CN115232915A (en) * | 2022-07-08 | 2022-10-25 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for extracting vanadium from vanadium-containing molten iron |
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| CN1032192A (en) * | 1987-02-16 | 1989-04-05 | 莫斯科钢合金院 | The preparation method of the iron carbon intermediate product of steel-making usefulness and implement the smelting furnace of this method |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102660659A (en) * | 2012-04-20 | 2012-09-12 | 北京科技大学 | Converter vanadium extraction process adopting top blowing oxygen lance to blow cooling agents |
| CN104437923A (en) * | 2014-11-25 | 2015-03-25 | 钢铁研究总院 | Automatic powder spraying device |
| CN106048136A (en) * | 2016-07-27 | 2016-10-26 | 北京科技大学 | Online steelmaking tapping process powder injection deoxidizing method and system |
| CN106048136B (en) * | 2016-07-27 | 2017-12-08 | 北京科技大学 | One kind steel-making tapping process dusts method of deoxidation and system online |
| CN109306392A (en) * | 2017-07-27 | 2019-02-05 | 佟萌 | A kind of use for refining molten steel air-flow dusts element with spray formula Ladle Bottom |
| CN109487035A (en) * | 2019-01-15 | 2019-03-19 | 山东钢铁股份有限公司 | A kind of blowing device |
| CN110157854A (en) * | 2019-06-04 | 2019-08-23 | 甘肃酒钢集团宏兴钢铁股份有限公司 | A method of the deoxidation of molten steel alloying in converter |
| CN110553510A (en) * | 2019-09-30 | 2019-12-10 | 龙森洁(厦门)环保科技有限公司 | Efficient powder sprayer and working method thereof |
| CN111363885A (en) * | 2020-04-09 | 2020-07-03 | 苏州大学 | Method for treating stainless steel dedusting ash by using electric arc furnace |
| CN111363885B (en) * | 2020-04-09 | 2021-09-28 | 苏州大学 | Method for treating stainless steel dedusting ash by using electric arc furnace |
| CN111411231A (en) * | 2020-05-20 | 2020-07-14 | 攀钢集团北海特种铁合金有限公司 | Automatic blowing and spraying device for ferrovanadium refining |
| CN112410498A (en) * | 2020-11-19 | 2021-02-26 | 攀钢集团攀枝花钢铁研究院有限公司 | Production method for extracting vanadium by spraying powder at bottom of converter |
| CN112410497A (en) * | 2020-11-19 | 2021-02-26 | 攀钢集团攀枝花钢铁研究院有限公司 | Production method for extracting vanadium by composite powder injection at top and bottom of converter |
| CN115232915A (en) * | 2022-07-08 | 2022-10-25 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for extracting vanadium from vanadium-containing molten iron |
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