CN106167845A - A kind of winding-up CO2or the method for carbon in limestone removing vanadium-bearing hot metal - Google Patents
A kind of winding-up CO2or the method for carbon in limestone removing vanadium-bearing hot metal Download PDFInfo
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- CN106167845A CN106167845A CN201610851634.7A CN201610851634A CN106167845A CN 106167845 A CN106167845 A CN 106167845A CN 201610851634 A CN201610851634 A CN 201610851634A CN 106167845 A CN106167845 A CN 106167845A
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- 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
- C21C7/068—Decarburising
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- 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
- C21C7/0037—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00 by injecting powdered material
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/10—Reduction of greenhouse gas [GHG] emissions
- Y02P10/122—Reduction of greenhouse gas [GHG] emissions by capturing or storing CO2
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Abstract
A kind of winding-up CO of the present invention2Or the method for carbon in limestone removing vanadium-bearing hot metal, concretely comprise the following steps: vanadium-bearing hot metal is imported in induction furnace by (1), it is ensured that vanadium-bearing hot metal temperature >=1450 DEG C；(2) vanadium-bearing hot metal is stirred, forms vortex；(3) by CO2Or limestone powder is blown in whirlpool, in molar ratio, CO2Or limestone powder winding-up amount is C element 1.2～1.5 times in vanadium-bearing hot metal, jet the time 30～60min, and persistently carry out eccentric stirring, obtain vanadium-bearing hot metal and slag after decarburization, generate CO and unreacted CO2It is collected；(4) CO is through post processing, generates CO2, CO2Re-use；Vanadium-bearing hot metal, slag separate.This invention is by winding-up CO2Or limestone, carrying out decarburization, and do not react with the V in vanadium-bearing hot metal, reach carbon drop and protect vanadium purpose, the vanadium-bearing hot metal after decarburization can directly smelt vanadium steel, is greatly shortened the smelting vanadium steel production cycle, improves vanadium utilization rate, has good economy and social benefit.
Description
Technical field:
The invention belongs to metallurgical technology field, be specifically related to a kind of winding-up CO2Or carbon in limestone removing vanadium-bearing hot metal
Method.
Background technology:
But vanadium is content the most scattered more metallic element in nature, often deposits in the way of tramp material in dispersed
Being in mineral, clearly, Independent Mineral is rare in association, and the mineral with commercial mining value are also few, therefore vanadium falls within
Yttrium.World's vanadium resource enriches, but the rich ore being individually available for exploitation is little, generally with low-grade association other
In Ore, and integrated distribution is in states such as China, South Africa, Russia.Vanadium magnetic iron ore by the emperor himself is the essential mineral resource of vanadium, China Sichuan
Flos Bombacis Malabarici and area, Chengde are contained has abundant vanadium to admire magnetic iron ore, is one of maximum vanadium resource concentration zones, the whole world.
The vanadium that there are about 80% in the world is used in steel industry.In iron and steel produces, vanadium is mainly used in smelting micro-conjunction
Aurification steel and other vanadium steel.Traditional smelting vanadium steel technique needs that barium oxide is first smelted into vanadium iron and closes
Gold, then adds vanadium iron in electric furnace or converter ladle and carries out alloying.
Vanadium many employings blast furnace ironmaking-converter duplex process for extracting vanadium in China's vanadium titano-magnetite extracts at present.Will Ore
Being smelted into the pig iron, vanadium enrichment, in molten iron, reoxidizes blowing and obtains the slag containing vanadium.Produce the vanadium slag obtained and use wet-leaching
Pentavalent vanadium is leached in solution by mode, and purified precipitation calcination processing obtains vanadic anhydride.By V2O5As raw material, add
Reducing agent, Calx, ferrosilicon etc. are smelted, and obtain vanadium iron.Smelt in vanadium iron is added ladle again, obtain vanadium alloy.
This technique production procedure is long, and the smelting process of vanadium iron is sufficiently complex, energy consumption is high, environmental pollution is big, therefore, finds a kind of new
Succinct production vanadium steel method is the most necessary.
The patent of Application No. CN201410029170.2 proposes the smelting process of a kind of vanadium-bearing hot metal vanadium extraction steel-making, its
Being smelted through pneumatic steelmaking operation, refining procedure and continuous casting working procedure by vanadium-bearing hot metal, described pneumatic steelmaking operation is: vanadium extraction,
Reclaim vanadium slag, steel-making.The method easily causes the loss of vanadium during still needing to smelting ferrovanadium, and recovery vanadium slag.
Traditional oxygen decarburization method, can make the V in vanadium-bearing hot metal prior to, in C oxidized entrance slag, causing the smelting of vanadium steel
Sweetening process is complicated.Smelt long flow path for traditional vanadium steel, the deficiencies such as complicated, energy consumption is high, environmental pollution is big smelted by vanadium iron.
Summary of the invention:
For the deficiencies in the prior art, the present invention proposes a kind of winding-up CO2Or carbon in limestone removing vanadium-bearing hot metal
Method.The method is by vanadium-bearing hot metal, without oxygen blast vanadium extraction, but is directly blown into CO to it2Gas, CO2Gas or spray into Calx
Stone powder, the C in oxidation vanadium-bearing hot metal, and do not react with the V in vanadium-bearing hot metal, reach carbon drop and protect the purpose of vanadium, obtain
Decarburization after vanadium-bearing hot metal can directly smelt vanadium steel.This invention is greatly shortened the production cycle smelting vanadium steel, improves vanadium
Utilization rate, has good economic benefit and social benefit.
For achieving the above object, the present invention is by the following technical solutions:
A kind of winding-up CO2Or the method for carbon in limestone removing vanadium-bearing hot metal, comprise the following steps:
(1) vanadium-bearing hot metal is imported in induction furnace, it is ensured that temperature >=1450 DEG C of vanadium-bearing hot metal；
(2) vanadium-bearing hot metal is stirred, forms the vortex that ratio of height to diameter is 0.5～2.5；
(3) by CO2Or limestone powder is blown in whirlpool, during winding-up, persistently carry out the stirring of step (2), obtain
Vanadium-bearing hot metal and slag after decarburization, gas is collected, and gas is the CO and unreacted CO generated2；Wherein, in molar ratio,
CO2Or the limestone powder amount of being blown into: the C element in vanadium-bearing hot metal=(1.2～1.5): 1, CO2Or the limestone powder winding-up time
It is 30～60min；
(4) CO is through post processing, generates CO2, CO2Return in induction furnace, re-use；Vanadium-bearing hot metal, slag are carried out point
From.
In described step (1), vanadium-bearing hot metal temperature is 1450～1650 DEG C, blast furnace ironmaking the slag obtained, reduction
Obtain.
In described step (1), in vanadium-bearing hot metal, carbon mass percent is 2.0～6.0%.
In described step (1), containing vanadium mass fraction in vanadium-bearing hot metal is 0.48～0.53%.
In described step (1), induction furnace includes slag-drip opening, row's molten iron mouth and winding-up mouth；Described winding-up mouth is bottom blowing
Mouth or the one of side-blown mouth；The bottom of the side of described induction furnace is provided with row's molten iron mouth, in opposite side upper of induction furnace
Portion is provided with slag-drip opening, and bottom blowing mouth is arranged on the bottom of induction furnace, and side-blown mouth is arranged on the bottom of induction furnace side；
Described induction furnace is provided with stirring paddle, fan housing and flue gas purification system；Described stirring paddle mounting means is:
Induction furnace top is eccentrically mounted；Described fan housing is arranged on the top of induction furnace, and the entrance of described flue gas purification system passes through
Pipeline is connected with fan housing, and the outlet of flue gas purification system is connected with the winding-up mouth of induction furnace by pipeline.
In described step (1), it is ensured that the method for temperature >=1450 DEG C of vanadium-bearing hot metal is, induction furnace conducting self-heating.
In described step (2), alr mode is, adjusts stirring paddle and is inserted into the 1/3～1/2 of vanadium-bearing hot metal liquid level
Place, carries out eccentric stirring, and wherein, eccentric mixing speed is 50-200r/min, and the degree of eccentricity is 0.1～0.8.
In described step (3), CO2Or the mode that is blown into of limestone powder is to be blown into or from sense from induction furnace bottom mouth
Furnace side mouthpiece is answered to be blown into.
In described step (3), carbon containing mass percent≤0.20% in the vanadium-bearing hot metal after decarburization.
In described step (3), containing vanadium mass percent in the vanadium-bearing hot metal after decarburization is 0.48～0.53%.
In described step (3), slag is mainly composed of CaO.
In described step (4), in induction furnace, upper strata is slag, and lower floor is vanadium-bearing hot metal, by slag from induction furnace deslagging
Mouth is discharged, and vanadium-bearing hot metal is poured out from sensing fire grate molten iron mouth.
In described step (4), the CO and unreacted CO of generation2Go to flue gas purification system via fan housing, will process
After gas and O2Return to after mixed combustion utilize.
Decarburization principle:
CO2+ [C]=2CO (g)
Beneficial effects of the present invention:
(1) the method reduce in traditional handicraft and blow vanadium-vanadium slag-wet method vanadium extraction-barium oxide-vanadium iron flow process, it is possible to by
After blast furnace vanadium-bearing hot metal decarburization, directly smelt vanadium steel.Greatly reduce operation, shorten smelting cycle, effectively reduce energy consumption and carry
The comprehensive utilization ratio of high vanadium.
(2) the method is at winding-up CO2Or during limestone powder, carry out eccentric stirring, the bubble being sparged into or Calx simultaneously
Stone decomposes the CO produced2Gas is crushed for minute bubbles granule, by bubble miniaturization, considerably increases gas liquid interfacial area, adds
Fast response speed, improves CO simultaneously2Utilization rate.
(3)CO2Gas can be recycled, the CO of generation2Itself has uniform temperature, it is not necessary to preheating, with [C] in melt
React and reach decarburization effect.
(4) the method is spraying into CO2Or during limestone powder, use bottom blowing or side-blown mode to be blown in vanadium-bearing hot metal,
Can effectively reduce carbon content in alloy, reduce phosphorus, silicone content to a certain extent, meet steely iron water demand.
(5) vanadium-bearing hot metal is while decarburization, the vanadium in molten iron can be protected not oxidized, can be prevented effectively from the burning of vanadium
Damaging, flow process is simple and convenient, has the most excellent effect when processing the molten iron containing valuable metal element.
Accompanying drawing illustrates:
Fig. 1 is the induction furnace system structure schematic diagram using the inventive method；Wherein, 1-slag-drip opening；2-arranges molten iron mouth；3-
Bottom blowing mouth；5-fan housing；6-flue gas purification system；7-stirring paddle.
Fig. 2 is the induction furnace system structure schematic diagram using the inventive method；Wherein, 1-slag-drip opening；2-arranges molten iron mouth；4-
Side-blown mouth；5-fan housing；6-flue gas purification system；7-stirring paddle.
Detailed description of the invention:
Below in conjunction with embodiment, the present invention is described in further detail.
Embodiment 1
Blast furnace vanadium-bearing hot metal in the embodiment of the present invention, concrete composition is as shown in table 1.
The each element component content of table 1 blast furnace vanadium-bearing hot metal (mass fraction, %)
Fig. 1 is shown in by the induction furnace system structure schematic diagram that the present embodiment uses.
A kind of winding-up CO2Or the method for carbon in limestone removing vanadium-bearing hot metal, comprise the following steps:
(1) by the slag obtained by blast furnace ironmaking that temperature is 1450 DEG C, the vanadium-bearing hot metal that reduction obtains imports to sensing
In stove, it is ensured that the temperature of vanadium-bearing hot metal is 1450 DEG C, wherein, in vanadium-bearing hot metal, carbon containing mass percent is 2.0%, containing vanadium quality
Mark is 0.48%；
(2) adjust stirring paddle 7 and be inserted at the 1/3 of vanadium-bearing hot metal liquid level, vanadium-bearing hot metal is carried out eccentric stirring, partially
Heart degree is 0.1, and mixing speed is 50r/min, forms the vortex that ratio of height to diameter is 0.5；
(3) by bottom blowing mouth 3, by CO2It is blown in whirlpool, and continues bias stirring, in molar ratio, CO2The amount of being blown into: containing vanadium iron
C element=1.2 in water: 1, CO2Blowing time is 30min, forms vanadium-bearing hot metal and slag after decarburization；
(4) in induction furnace, lower floor is molten iron, and upper strata is slag, and lower floor's molten iron is discharged by arranging molten iron mouth 2, upper strata slag by
Slag-drip opening 1 is discharged, and wherein, containing C mass percent in the vanadium-bearing hot metal after decarburization is 0.08%, containing V mass percent is
0.48%, it is 0.01% containing P mass fraction, is 0.196% containing Si mass fraction；
(5) CO generated and unreacted CO2Go to flue gas purification system 6 via fan housing 5, by CO process after gas with
O2CO is generated after mixed combustion2, return to utilize.
Embodiment 2
Blast furnace vanadium-bearing hot metal in the embodiment of the present invention, concrete composition is as shown in table 2.
The each element component content of table 2 blast furnace vanadium-bearing hot metal (mass fraction, %)
Fig. 1 is shown in by the induction furnace system structure schematic diagram that the present embodiment uses.
A kind of winding-up CO2Or the method for carbon in limestone removing vanadium-bearing hot metal, comprise the following steps:
(1) by the slag obtained by blast furnace ironmaking that temperature is 1500 DEG C, the vanadium-bearing hot metal that reduction obtains imports to sensing
In stove, it is ensured that the temperature of vanadium-bearing hot metal is 1550 DEG C, wherein, in vanadium-bearing hot metal, carbon containing mass percent is 3.4%, containing vanadium quality
Mark is 0.51%；
(2) adjust stirring paddle 7 and be inserted at the 1/3 of vanadium-bearing hot metal liquid level, vanadium-bearing hot metal is carried out eccentric stirring, partially
Heart degree is 0.3, and mixing speed is 100r/min, forms the vortex that ratio of height to diameter is 1.0；
(3) by side-blown mouth 4, by CO2It is blown in whirlpool, and continues bias stirring, in molar ratio, CO2The amount of being blown into: containing vanadium iron
C element=1.5:1 in water, CO2Blowing time is 40min, forms vanadium-bearing hot metal and slag after decarburization；
(4) in induction furnace, lower floor is molten iron, and upper strata is slag, and lower floor's molten iron is discharged by arranging molten iron mouth 2, upper strata slag by
Slag-drip opening 1 is discharged, and wherein, containing C mass percent in the vanadium-bearing hot metal after decarburization is 0.10%, containing V mass percent is
0.51%, it is 0.073% containing P mass fraction, is 0.082% containing Si mass fraction；
(5) CO generated and unreacted CO2Go to flue gas purification system 6 via fan housing 5, by CO process after gas with
O2CO is generated after mixed combustion2, return to utilize.
Embodiment 3
Blast furnace vanadium-bearing hot metal in the embodiment of the present invention, concrete composition is as shown in table 1.
The each element component content of table 3 blast furnace vanadium-bearing hot metal (mass fraction, %)
Fig. 1 is shown in by the induction furnace system structure schematic diagram that the present embodiment uses.
A kind of winding-up CO2Or the method for carbon in limestone removing vanadium-bearing hot metal, comprise the following steps:
(1) by the slag obtained by blast furnace ironmaking that temperature is 1650 DEG C, the vanadium-bearing hot metal that reduction obtains imports to sensing
In stove, it is ensured that the temperature of vanadium-bearing hot metal is 1700 DEG C, wherein, in vanadium-bearing hot metal, carbon containing mass percent is 4.8%, containing vanadium quality
Mark is 0.49%；
(2) adjust stirring paddle 7 and be inserted at the 1/2 of vanadium-bearing hot metal liquid level, vanadium-bearing hot metal is carried out eccentric stirring, partially
Heart degree is 0.8, and mixing speed is 200r/min, forms the vortex that ratio of height to diameter is 2.5；
(3) by bottom blowing mouth 3, by CO2It is blown in whirlpool, and continues bias stirring, in molar ratio, CO2The amount of being blown into: containing vanadium iron
C element=1.5 in water: 1, CO2Blowing time is 60min, forms vanadium-bearing hot metal and slag after decarburization；
(4) in induction furnace, lower floor is molten iron, and upper strata is slag, and lower floor's molten iron is discharged by arranging molten iron mouth 2, upper strata slag by
Slag-drip opening 1 is discharged, and wherein, containing C mass percent in the vanadium-bearing hot metal after decarburization is 0.11%, containing V mass percent is
0.49%, it is 0.081% containing P mass fraction, is 0.103% containing Si mass fraction；
(5) CO generated and unreacted CO2Go to flue gas purification system 6 via fan housing 5, by CO process after gas with
O2CO is generated after mixed combustion2, return to utilize.
Embodiment 4
Blast furnace vanadium-bearing hot metal in the embodiment of the present invention, concrete composition is as shown in table 3.
The each element component content of table 4 blast furnace vanadium-bearing hot metal (mass fraction, %)
Fig. 2 is shown in by the induction furnace system structure schematic diagram that the present embodiment uses.
A kind of winding-up CO2Or the method for carbon in limestone removing vanadium-bearing hot metal, comprise the following steps:
(1) by the slag obtained by blast furnace ironmaking that temperature is 1450 DEG C, the vanadium-bearing hot metal that reduction obtains imports to sensing
In stove, it is ensured that the temperature of vanadium-bearing hot metal is 1450 DEG C, wherein, in vanadium-bearing hot metal, carbon containing mass percent is 5.2%, containing vanadium quality
Mark is 0.52%；
(2) adjust stirring paddle 7 and be inserted at the 1/3 of vanadium-bearing hot metal liquid level, vanadium-bearing hot metal is carried out eccentric stirring, partially
Heart degree is 0.6, and mixing speed is 150r/min, forms the vortex that ratio of height to diameter is 0.5；
(3) by side-blown mouth 4, limestone powder is blown in whirlpool, and continues bias stirring, in molar ratio, agstone
The end amount of being blown into: C element=1.2 in vanadium-bearing hot metal: 1, limestone powder blowing time is 30min, contains vanadium iron after forming decarburization
Water and slag；
(4) in induction furnace, lower floor is molten iron, and upper strata is slag, and lower floor's molten iron is discharged by arranging molten iron mouth 2, upper strata slag by
Slag-drip opening 1 is discharged, and wherein, containing C mass percent in the vanadium-bearing hot metal after decarburization is 0.14%, containing V mass percent is
0.52%, it is 0.124% containing P mass fraction, is 0.133% containing Si mass fraction；
(5) CO generated and unreacted CO2Go to flue gas purification system 6 via fan housing 5, by CO process after gas with
O2CO is generated after mixed combustion2, return to utilize.
Embodiment 5
Blast furnace vanadium-bearing hot metal in the embodiment of the present invention, concrete composition is as shown in table 4.
The each element component content of table 5 blast furnace vanadium-bearing hot metal (mass fraction, %)
Fig. 2 is shown in by the induction furnace system structure schematic diagram that the present embodiment uses.
A kind of winding-up CO2Or the method for carbon in limestone removing vanadium-bearing hot metal, comprise the following steps:
(1) by the slag obtained by blast furnace ironmaking that temperature is 1650 DEG C, the vanadium-bearing hot metal that reduction obtains imports to sensing
In stove, it is ensured that the temperature of vanadium-bearing hot metal is 1650 DEG C, wherein, in vanadium-bearing hot metal, carbon containing mass percent is 6.0%, containing vanadium quality
Mark is 0.53%；
(2) adjust stirring paddle 7 and be inserted at the 1/2 of vanadium-bearing hot metal liquid level, vanadium-bearing hot metal is carried out eccentric stirring, partially
Heart degree is 0.8, and mixing speed is 200r/min, forms the vortex that ratio of height to diameter is 1.8；
(3) by bottom blowing mouth 3, limestone powder is blown in whirlpool, and continues bias stirring, in molar ratio, agstone
The end amount of being blown into: C element=1.4 in vanadium-bearing hot metal: 1, CO2Blowing time is 50min, and after forming decarburization, vanadium-bearing hot metal is with molten
Slag；
(4) in induction furnace, lower floor is molten iron, and upper strata is slag, and lower floor's molten iron is discharged by arranging molten iron mouth 2, upper strata slag by
Slag-drip opening 1 is discharged, and wherein, containing C mass percent in the vanadium-bearing hot metal after decarburization is 0.20%, containing V mass percent is
0.53%, it is 0.062% containing P mass fraction, is 0.039% containing Si mass fraction；
(5) CO generated and unreacted CO2Go to flue gas purification system 6 via fan housing 5, by CO process after gas with
O2CO is generated after mixed combustion2, return to utilize.
Embodiment 6
Blast furnace vanadium-bearing hot metal in the embodiment of the present invention, concrete composition is as shown in table 3.
The each element component content of table 6 blast furnace vanadium-bearing hot metal (mass fraction, %)
Fig. 2 is shown in by the induction furnace system structure schematic diagram that the present embodiment uses.
A kind of winding-up CO2Or the method for carbon in limestone removing vanadium-bearing hot metal, comprise the following steps:
(1) by the slag obtained by blast furnace ironmaking that temperature is 1550 DEG C, the vanadium-bearing hot metal that reduction obtains imports to sensing
In stove, it is ensured that the temperature of vanadium-bearing hot metal is 1550 DEG C, wherein, in vanadium-bearing hot metal, carbon containing mass percent is 5.5%, containing vanadium quality
Mark is 0.50%；
(2) adjust stirring paddle 7 and be inserted at the 1/2 of vanadium-bearing hot metal liquid level, vanadium-bearing hot metal is carried out eccentric stirring, partially
Heart degree is 0.6, and mixing speed is 150r/min, forms the vortex that ratio of height to diameter is 2.5；
(3) by side-blown mouth 4, limestone powder is blown in whirlpool, and continues bias stirring, in molar ratio, agstone
The end amount of being blown into: C element=1.5 in vanadium-bearing hot metal: 1, limestone powder blowing time is 60min, contains vanadium iron after forming decarburization
Water and slag；
(4) in induction furnace, lower floor is molten iron, and upper strata is slag, and lower floor's molten iron is discharged by arranging molten iron mouth 2, upper strata slag by
Slag-drip opening 1 is discharged, and wherein, containing C mass percent in the vanadium-bearing hot metal after decarburization is 0.18%, containing V mass percent is
0.50%, it is 0.105% containing P mass fraction, is 0.149% containing Si mass fraction；
(5) CO generated and unreacted CO2Go to flue gas purification system 6 via fan housing 5, by CO process after gas with
O2CO is generated after mixed combustion2, return to utilize.
Claims (8)
1. a winding-up CO2Or the method for carbon in limestone removing vanadium-bearing hot metal, it is characterised in that comprise the following steps:
(1) vanadium-bearing hot metal is imported in induction furnace, it is ensured that temperature >=1450 DEG C of vanadium-bearing hot metal；
(2) vanadium-bearing hot metal is stirred, forms the vortex that ratio of height to diameter is 0.5～2.5；
(3) by CO2Or limestone powder is blown in whirlpool, during winding-up, persistently carry out the stirring of step (2), after obtaining decarburization
Vanadium-bearing hot metal and slag, gas is collected, and gas is the CO and unreacted CO generated2；Wherein, in molar ratio, CO2Or stone
The lime stone powder amount of being blown into: the C element in vanadium-bearing hot metal=(1.2～1.5): 1, CO2Or limestone powder winding-up the time be 30～
60min；
(4) CO is through post processing, generates CO2, CO2Return in induction furnace, re-use；Vanadium-bearing hot metal, slag separate.
Winding-up CO the most according to claim 12Or the method for carbon in limestone removing vanadium-bearing hot metal, it is characterised in that described
Step (1) in, vanadium-bearing hot metal temperature is 1450～1650 DEG C, blast furnace ironmaking the slag obtained, and reduction obtains.
Winding-up CO the most according to claim 12Or the method for carbon in limestone removing vanadium-bearing hot metal, it is characterised in that described
Step (1) in, induction furnace include slag-drip opening, row molten iron mouth and winding-up mouth；Described winding-up mouth is bottom blowing mouth or side-blown mouth
A kind of；The bottom of the side of described induction furnace is provided with row's molten iron mouth, and the top of the opposite side of induction furnace is provided with deslagging
Mouthful, bottom blowing mouth is arranged on the bottom of induction furnace, and side-blown mouth is arranged on the bottom of induction furnace side；
Described induction furnace is provided with stirring paddle, fan housing and flue gas purification system；Described stirring paddle mounting means is: in sensing
Furnace roof portion is eccentrically mounted；Described fan housing is arranged on the top of induction furnace, and the entrance of described flue gas purification system passes through pipeline
Being connected with fan housing, the outlet of flue gas purification system is connected with the winding-up mouth of induction furnace by pipeline.
Winding-up CO the most according to claim 32Or the method for carbon in limestone removing vanadium-bearing hot metal, it is characterised in that described
Step (2) in, alr mode is, adjust stirring paddle be inserted at the 1/3～1/2 of vanadium-bearing hot metal liquid level, carry out bias
Stirring, wherein, eccentric mixing speed is 50～200r/min, and the degree of eccentricity is 0.1～0.8.
Winding-up CO the most according to claim 32Or the method for carbon in limestone removing vanadium-bearing hot metal, it is characterised in that described
Step (3) in, CO2The mode that is blown into be to be blown into from induction furnace bottom mouth or be blown into from the side-blown mouth of induction furnace.
Winding-up CO the most according to claim 12Or the method for carbon in limestone removing vanadium-bearing hot metal, it is characterised in that described
Step (3) in, carbon containing mass percent≤0.20% in the vanadium-bearing hot metal after decarburization.
Winding-up CO the most according to claim 32Or the method for carbon in limestone removing vanadium-bearing hot metal, it is characterised in that described
Step (4) in, in induction furnace, upper strata is slag, and lower floor is vanadium-bearing hot metal, by slag from induction furnace slag-drip opening discharge, containing vanadium
Molten iron is poured out from sensing fire grate molten iron mouth.
Winding-up CO the most according to claim 32Or the method for carbon in limestone removing vanadium-bearing hot metal, it is characterised in that described
Step (4) in, the CO and unreacted CO of generation2Flue gas purification system is gone to, the gas after processing and O via fan housing2Mixed
Return to after combination burning utilize.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610851634.7A CN106167845B (en) | 2016-09-27 | 2016-09-27 | A kind of blowing CO2Or the method that lime stone removes carbon in vanadium-bearing hot metal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610851634.7A CN106167845B (en) | 2016-09-27 | 2016-09-27 | A kind of blowing CO2Or the method that lime stone removes carbon in vanadium-bearing hot metal |
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| Publication Number | Publication Date |
|---|---|
| CN106167845A true CN106167845A (en) | 2016-11-30 |
| CN106167845B CN106167845B (en) | 2019-02-05 |
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| CN201610851634.7A Active CN106167845B (en) | 2016-09-27 | 2016-09-27 | A kind of blowing CO2Or the method that lime stone removes carbon in vanadium-bearing hot metal |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112226560A (en) * | 2020-10-14 | 2021-01-15 | 中国恩菲工程技术有限公司 | Method for reducing content of titanium nitride and/or titanium carbide in slag |
| CN112981045A (en) * | 2021-02-09 | 2021-06-18 | 东北大学 | Method for dephosphorizing and preserving vanadium of molten iron containing vanadium and phosphorus |
| CN115522114A (en) * | 2022-09-26 | 2022-12-27 | 中国科学院过程工程研究所 | Method for preparing high-purity medium-high carbon molten steel in short process |
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| CN104294002A (en) * | 2014-10-23 | 2015-01-21 | 北京科技大学 | Method for smelting medium- and low-carbon ferrochromium by introducing one-step method of carbon dioxide converter |
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| JP2006315926A (en) * | 2005-05-16 | 2006-11-24 | Nippon Steel Corp | Method of treating converter by-produced gas |
| CN101245404A (en) * | 2008-03-21 | 2008-08-20 | 东北大学 | Air bubble thining in process of hot metal sublimation and dispersion method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112226560A (en) * | 2020-10-14 | 2021-01-15 | 中国恩菲工程技术有限公司 | Method for reducing content of titanium nitride and/or titanium carbide in slag |
| CN112226560B (en) * | 2020-10-14 | 2022-05-20 | 中国恩菲工程技术有限公司 | Method for reducing content of titanium nitride and/or titanium carbide in slag |
| CN112981045A (en) * | 2021-02-09 | 2021-06-18 | 东北大学 | Method for dephosphorizing and preserving vanadium of molten iron containing vanadium and phosphorus |
| CN112981045B (en) * | 2021-02-09 | 2022-03-22 | 东北大学 | Method for dephosphorizing and preserving vanadium of molten iron containing vanadium and phosphorus |
| CN115522114A (en) * | 2022-09-26 | 2022-12-27 | 中国科学院过程工程研究所 | Method for preparing high-purity medium-high carbon molten steel in short process |
| CN115522114B (en) * | 2022-09-26 | 2023-09-12 | 中国科学院过程工程研究所 | Method for preparing high-cleanliness medium-high carbon steel liquid in short process |
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| CN106167845B (en) | 2019-02-05 |
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