CN110129507A - The method of smelting and smelting apparatus of iron-based polymetallic ore material - Google Patents
The method of smelting and smelting apparatus of iron-based polymetallic ore material Download PDFInfo
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- CN110129507A CN110129507A CN201910517189.4A CN201910517189A CN110129507A CN 110129507 A CN110129507 A CN 110129507A CN 201910517189 A CN201910517189 A CN 201910517189A CN 110129507 A CN110129507 A CN 110129507A
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct processes
- C21B13/0006—Making spongy iron or liquid steel, by direct processes obtaining iron or steel in a molten state
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct processes
- C21B13/006—Starting from ores containing non ferrous metallic oxides
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct processes
- C21B13/14—Multi-stage processes processes carried out in different vessels or furnaces
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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
- Y02P10/143—Reduction of greenhouse gas [GHG] emissions of methane [CH4]
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Abstract
The present invention provides the method for smelting and smelting apparatus of a kind of iron-based polymetallic ore material.The smelting system that above-mentioned method of smelting uses includes the bath smelting device and electrothermal reduction device being connected, bath smelting device is provided with the first feed opening and the second feed opening, and first feed opening the top of bath smelting device is set, second feed opening is arranged on the side wall of bath smelting device, electrothermal reduction device is provided with slag-drip opening and metal discharge mouth, method of smelting includes: that iron-based polymetallic ore material, fuel, flux and oxygen-enriched air are delivered in bath smelting device to carry out melting and partial reduction, obtains molten liquid；Molten liquid and reducing agent are delivered to electrothermal reduction device and carry out reduction melting, obtains molten iron and slag.The technique combined using efficient bath smelting with electrothermal reduction can effectively improve the rate of recovery of vanadium, while also having reduction comprehensive energy consumption, promoting the advantages such as environment discharge index.
Description
Technical field
The present invention relates to metal smelt fields, method of smelting in particular to a kind of iron-based polymetallic ore material and molten
Refine device.
Background technique
Vanadium titano-magnetite is a kind of ore of more difficult smelting.The v-bearing titanomagnetite smelting technique of mature application is main at present
There are two types of: first is that blast furnace process, mainly first vanadium titano-magnetite is added in blast furnace after oversintering or pelletizing, recycling iron with
Vanadium.The steel mill, Nizhni Tagil etc. for climbing steel and hold steel, Russia for mainly having China smelted at present using the technique.Second is that
Rotary kiln-electric furnace process.It mainly uses rotary kiln prereduction vanadium titano-magnetite iron ore concentrate, obtains calcining；Then calcining is added
Enter and carry out reduction melting in electric furnace, to recycle iron and vanadium.At present using the technique smelted mainly have New Zealand's steel and
South Africa Granville etc..And other v-bearing titanomagnetite smelting techniques, mostly in research or industrial test stage, and it is not implemented
The industrial production of scale.
Blast furnace process is method of the earliest exploitation for handling vanadium titano-magnetite iron ore concentrate, can recycle about 90% iron,
About 50% vanadium, but titanium elements fail to recycle.The major advantage of blast furnace process processing vanadium titano-magnetite is high production efficiency, production
Scale is big, the disadvantage is that comprehensive energy consumption is high, long flow path, slag iron difficulty are divided, dry slag and desulphurizing ability are low.Furthermore blast furnace process is to TiO in slag2
Content requirement it is higher, generally will be lower than 25%.
The characteristics of rotary kiln-electric furnace process is the vanadium titano-magnetite concentrate that obtained through ore dressing can be directly used in smelting, process
It is short, iron, vanadium the rate of recovery be above blast furnace process, but also fail to recycle titanium slag at present.The prior art (CN107858502A)
A kind of vanadium titano-magnetite processing method is provided, the processing method is first rough to vanadium titano-magnetite successively to carry out mine choosing, rotary kiln
It prereduction, electric furnace reduction melting and bessemerizes, obtains vanadium slag and half steel.Compared to blast furnace process, rotary kiln-electric furnace process synthesis
Low energy consumption, and without coking, sintering, environmental emission index is more excellent.Rotary kiln-electric furnace process the disadvantage is that comprehensive energy consumption is still higher,
And it is strong to the dependence of electric power energy, it is difficult to promote in the area that electric power resource is deficient or power cost is high.
Presence in view of the above problems, it is necessary to which a kind of low energy consumption for iron-based polymetallic ore material and high-recovery are provided
Method of smelting.
Summary of the invention
The main purpose of the present invention is to provide the method for smelting and smelting apparatus of a kind of iron-based polymetallic ore material, to solve
The not strong problem of energy consumption height and adaptability to raw material existing for existing smelting technology.
To achieve the goals above, according to an aspect of the invention, there is provided a kind of melting of iron-based polymetallic ore material
Method, iron-based polymetallic ore material include ferro element, titanium elements and vanadium, and the smelting system that above-mentioned method of smelting uses includes phase
The bath smelting device and electrothermal reduction device of connection, bath smelting device are provided with the first feed opening and the second feed opening, and
The top of bath smelting device is arranged in first feed opening, and the second feed opening is arranged on the side wall of bath smelting device, electric heating
Reduction apparatus is provided with slag-drip opening and metal discharge mouth, and method of smelting includes: by iron-based polymetallic ore material, fuel, flux and richness
Oxygen air delivery carries out melting and partial reduction into bath smelting device, obtains molten liquid；Molten liquid and reducing agent are conveyed
Reduction melting is carried out to electrothermal reduction device, obtains molten iron and slag.
Further, bath smelting device is side-blown immersion bath smelting device, and melting step includes: will be iron-based mostly golden
Belong to the molten bath that bath smelting device is added in mineral aggregate and flux the first feed opening and/or the second feed opening through bath smelting device
In, and at least one first side-blown spray gun is immersed in molten bath, then use the first side-blown spray gun by fuel and oxygen-enriched air
Molten bath is sprayed into, to carry out melting and partial reduction process, obtains molten liquid；Preferably, melt step temperature be 1450~
1650 DEG C, preferably 1500~1600 DEG C；Preferably, fuel be selected from natural gas, coal gas and fine coal composition one of group or
It is a variety of；Preferably, oxygen-enriched air is that the volumetric concentration of oxygen is greater than 50% gas.
Further, the step of reduction melting further include: molten liquid is delivered in electrothermal reduction device, using second side
It blows and sprays rifle and/or top-blown spray gun sprays reductant into the ullage of electrothermal reduction device.
Further, the temperature of reduction melting step is 1450~1650 DEG C；Preferably, the temperature of reduction melting step is
1500~1600 DEG C.
Further, before carrying out melting and partial reduction step, method of smelting further include: to iron-based polymetallic ore
Material, fuel, flux and reducing agent are pre-processed respectively, equal with the granularity of iron-based polymetallic ore material, fuel, flux and reducing agent
≤ -50mm, water content≤15wt%；Preferably, bath smelting system further includes and the first feed opening and/or the second feed opening
The cylinder mixing device being connected, before carrying out in melting step, method of smelting further includes being carried out using cylinder mixing device
Mixing.
Further, smelting system further includes waste-heat recovery device, and method of smelting further includes the steps that waste heat recycles, waste heat
The step of recycling includes: the heat recycled in the flue gas generated in melting step and reduction melting step using waste-heat recovery device
Amount；Preferably, waste-heat recovery device is waste heat boiler.
Further, after waste heat recovery processing, the temperature of flue gas is down to 100~200 DEG C.
Further, smelting system further includes dust arrester installation, method of smelting further include: flue gas is carried out waste heat recovery processing
Afterwards, processing of gathering dust is carried out using dust arrester installation.
Further, to account for the weight of iron-based polymetallic ore material, the dosage of flux is 0~20%.
Further, iron-based polymetallic ore material is selected from vanadium titano-magnetite and/or sea sand mine.
The another aspect of the application additionally provides a kind of smelting apparatus for handling iron-based polymetallic ore material, iron-based polymetallic ore
Material includes ferro element, titanium elements and vanadium, and smelting apparatus includes bath smelting device and electrothermal reduction device, bath smelting dress
It installs and is equipped with the first feed opening and the second feed opening and molten liquid outlet, and the top of bath smelting device is arranged in the first feed opening
Portion, the second feed opening are arranged on the side wall of bath smelting device；And electrothermal reduction device is provided with slag-drip opening and metal discharge
Mouth and molten liquid entrance, molten liquid entrance are connected with molten liquid outlet.
Further, bath smelting device is side-blown immersion bath smelting device, and bath smelting device includes at least one
A first side-blown spray gun, the nozzle of the first side-blown spray gun are immersed in the liquid level in the molten bath in bath smelting device through the second feed opening
Hereinafter, to spray into fuel and oxygen-enriched air to molten bath.
Further, electrothermal reduction device include: at least one electrode, at least one second side-blown spray gun and at least one
Top-blown spray gun, the end of electrode are located at below the liquid phase material in electrothermal reduction device, are used for electrothermal reduction process heat supply；The
The nozzle of two side-blown spray guns and the nozzle of top-blown spray gun are respectively positioned on the ullage in electrothermal reduction device, for spraying reducing agent
Enter electrothermal reduction device；Preferably, each second side-blown spray gun is separately positioned on the opposite side wall of electrothermal reduction device.
Further, bath smelting device is additionally provided with the first flue, the molten bath phase of the first flue and bath smelting device
Connection.
Further, electrothermal reduction device is additionally provided with the second flue, the reduction chamber of the second flue and electrothermal reduction device
It is connected.
It applies the technical scheme of the present invention, for existing blast furnace, rotary kiln-furnace technology, there are energy consumption height, raw materials to adapt to
Property it is not strong the problems such as, the application use oxygen enriched molten bath smelting apparatus and electrothermal reduction device two combination oven technologies, will it is iron-based mostly gold
Belong to concentrate and fuel directly enters the short route of furnace, to save the pretreatment process such as smelting in rotary kiln or sintering.Using efficient
The technique that bath smelting is combined with electrothermal reduction can effectively improve the rate of recovery of vanadium, while also have the comprehensive energy of reduction
Consumption promotes the advantages such as environment discharge index.
Detailed description of the invention
The accompanying drawings constituting a part of this application is used to provide further understanding of the present invention, and of the invention shows
Examples and descriptions thereof are used to explain the present invention for meaning property, does not constitute improper limitations of the present invention.In the accompanying drawings:
Fig. 1 shows the method for smelting for the iron-based polymetallic ore material that a kind of typical embodiment according to the present invention provides
Process flow chart；
Fig. 2 shows a kind of method of smelting for the iron-based polymetallic ore material that typical embodiment provides according to the present invention
Involved in device figure；And
Fig. 3 shows the smelting apparatus for the iron-based polymetallic ore material that a kind of typical embodiment according to the present invention provides
Structural schematic diagram；
Fig. 4 shows structural schematic diagram of the bath smelting device shown in Fig. 3 on the direction A-A；
Fig. 5 shows structural schematic diagram of the electrothermal reduction device shown in Fig. 3 on the direction C-C.
Wherein, the above drawings include the following reference numerals:
10, bath smelting device；11, the first side-blown spray gun；12, the first flue；101, the first feed opening；102, second adds
Material mouth；
20, electrothermal reduction device；21, electrode；22, the second side-blown spray gun；23, top-blown spray gun；24, the second flue；201,
Slag-drip opening；202, metal discharge mouth；30, cylinder mixing device；40, waste-heat recovery device；50, dust arrester installation.
Specific embodiment
It should be noted that in the absence of conflict, the features in the embodiments and the embodiments of the present application can phase
Mutually combination.Below in conjunction with embodiment, the present invention will be described in detail.
As described in background technique, existing smelting technology has that energy consumption height and adaptability to raw material be not strong.
In order to solve the above-mentioned technical problem, as shown in Fig. 1 to 5, this application provides a kind of method of smelting of iron-based polymetallic ore material, iron
Quito metal mineral aggregate includes ferro element, titanium elements and vanadium, and the smelting system that method of smelting uses includes the molten bath being connected
Smelting apparatus 10 and electrothermal reduction device 20, bath smelting device 10 are provided with the first feed opening 101 and the second feed opening 102,
And first feed opening 101 top of bath smelting device 10 is set, bath smelting device 10 is arranged in the second feed opening 102
On side wall, electrothermal reduction device 20 is provided with slag-drip opening 201 and metal discharge mouth 202, and above-mentioned method of smelting includes: will be iron-based more
Metal mineral aggregate, fuel, flux and oxygen-enriched air, which are delivered in bath smelting device 10, carries out melting and partial reduction, is melted
Liquid；Molten liquid and reducing agent are delivered to electrothermal reduction device 20 and carry out reduction melting, obtains molten iron and slag.
For existing blast furnace, rotary kiln-furnace technology there are energy consumptions it is high, adaptability to raw material is not strong the problems such as, the application adopts
With two combination oven technologies of oxygen enriched molten bath smelting apparatus 10 and electrothermal reduction device 20, iron-based Complex concentrate and fuel are directly entered
The short route of furnace, to save the pretreatment process such as smelting in rotary kiln or sintering.Using efficient bath smelting and electrothermal reduction
The technique combined can effectively improve the rate of recovery of vanadium, while also there is reduction comprehensive energy consumption, promotion environmental emission to refer to
The advantages such as mark.
In a kind of preferred embodiment, bath smelting device 10 is side-blown immersion bath smelting device, melts step
It include: the first feed opening 101 and/or the second feed opening 102 by iron-based polymetallic ore material and flux through bath smelting device 10
It is added in the molten bath of bath smelting device 10, and at least one first side-blown spray gun 11 is immersed in molten bath, then using the
Fuel and oxygen-enriched air are sprayed into molten bath by one side-blown spray gun 11, to carry out melting and partial reduction process, obtain molten liquid.
Be conducive to further increase iron-based more metals as bath smelting device using side-blown immersion bath smelting device
The smelting efficiency of mineral aggregate.And use the first side-blown spray gun 11 by the liquid phase of fuel and oxygen-enriched air penetrating bath smelting device 10
Below material strong agitation can be formed to molten liquid therein, thus be conducive to improve mass-and heat-transfer efficiency, meanwhile, this also has
Conducive to the rate of recovery for improving subsequent vanadium etc..In order to further increase smelting efficiency, it is preferable that the temperature for melting step is
1450~1650 DEG C, preferably 1500~1600 DEG C.
In above-mentioned method of smelting, fuel can use type commonly used in the art.Preferably, fuel is selected from natural gas, coal
One of group of gas and fine coal composition is a variety of.Reduction process costs are also helped using above-mentioned fuel.Preferably, burning system
Number control is 0.4~0.65.Preferably, oxygen-enriched air is that the volumetric concentration of oxygen is greater than 50% gas.In order to make fuel more
Add sufficient burning, to improve the efficiency that fuel is converted into thermal energy, it is preferable that oxygen-enriched air is that the volumetric concentration of oxygen is greater than
50% gas.Be conducive to further increase the efficiency of melting step using above-mentioned oxygen-enriched air.
In a kind of preferred embodiment, the step of reduction melting further include: molten liquid is delivered to electrothermal reduction device
In 20, the ullage of electrothermal reduction device 20 is sprayed reductant into using the second side-blown spray gun 22 and/or top-blown spray gun 23.It adopts
The contact area that molten liquid and reducing agent can be improved is sprayed reductant into the second side-blown spray gun 22 and/or top-blown spray gun 23,
So that the two is sufficiently reacted, and then the reduction process of reinforced metal vanadium.By reducing agent electrothermal reduction device 20 ullage
It sprays into, is conducive to that the addition of raw material is inhibited to cause to stir to the liquid level of electrothermal reduction device 20, to reduce it to dilution process
The influence of the separative efficiency of middle vanadium-bearing hot metal and titanium slag.
In order to further increase the rate of recovery of vanadium, in a kind of preferred embodiment, the temperature of reduction melting is
1450~1650 DEG C；Preferably, the temperature of reduction melting step is 1500~1600 DEG C.
In a kind of preferred embodiment, before carrying out melting and partial reduction step, method of smelting further include: to iron
Quito metal mineral aggregate, fuel, flux and reducing agent are pre-processed respectively, with iron-based polymetallic ore material, fuel, flux and reduction
The granularity of agent≤- 50mm, water content≤15wt%.The granularity and water content of iron-based polymetallic ore material include but is not limited on
Range is stated, and is limited the melting efficiency for being conducive to improve iron-based more raw metals within the above range.
Preferably, bath smelting system further includes that the cylinder being connected with the first feed opening 101 and the second feed opening 102 mixes
Expect device 30, before carrying out in melting step, method of smelting further includes carrying out mixing using cylinder mixing device 30.
A certain amount of flue gas can be generated in above-mentioned fusion process, include higher heat in these usual flue gases.In order to drop
The loss of low energy, in a kind of preferred embodiment, smelting system further includes waste-heat recovery device 40, and method of smelting further includes
Waste heat recycle the step of, waste heat recycle the step of include: using waste-heat recovery device 40 recycle fusing and partial reduction step and
The heat in flue gas generated in reduction melting step.Preferably, above-mentioned waste-heat recovery device 40 is waste heat boiler.More preferably
Ground, after waste heat recovery processing, the temperature of flue gas is down to 100~200 DEG C
A certain amount of dust would generally be carried secretly in the flue gas that above-mentioned fusion process generates, in order to improve the environmental protection of entire technique
Property, in a kind of preferred embodiment, smelting system further includes dust arrester installation 50, method of smelting further include: more than carrying out flue gas
After recuperation of heat processing, processing of gathering dust is carried out using dust arrester installation 50.
In a kind of preferred embodiment, to account for the weight of iron-based polymetallic ore material, the dosage of flux is 0
~20%.Flux dosage is limited to the content for being conducive to control titanium elements in titanium slag within the above range, in order to subsequent to it
Further applied.
In a kind of preferred embodiment, iron-based polymetallic ore material is selected from vanadium titano-magnetite and/or sea sand mine.
The another aspect of the application additionally provides a kind of smelting apparatus for handling iron-based polymetallic ore material, such as the institute of Fig. 2 to 5
Show, iron-based polymetallic ore material includes ferro element, titanium elements and vanadium, and smelting apparatus includes: bath smelting device 10 and electric heating
Reduction apparatus 20, bath smelting device 10 is provided with the first feed opening 101 and the second feed opening 102 and molten liquid exports, and the
The top of bath smelting device 10 is arranged in one feed opening 101, and the side wall of bath smelting device 10 is arranged in the second feed opening 102
On；And electrothermal reduction device 20 is provided with slag-drip opening 201 and metal discharge mouth 202 and molten liquid entrance, molten liquid entrance and molten
Tap spout is connected.
For existing blast furnace or rotary kiln-electro-smelting device there are energy consumptions it is high, adaptability to raw material is not strong the problems such as, this Shen
The two combination oven technologies that please use oxygen enriched molten bath smelting apparatus 10 and electrothermal reduction device 20, take iron-based Complex concentrate and fuel
The abbreviated system for directly entering furnace, to eliminate the pretreatment process such as rotary kiln melting or sintering.It is molten using efficient molten bath
The smelting apparatus that refining device 10 is combined with electrothermal reduction device 20 can effectively improve the rate of recovery of vanadium, while also have
It reduces comprehensive energy consumption, promote the advantages such as environment discharge index.
In a kind of preferred embodiment, bath smelting device 10 is side-blown immersion bath smelting device, bath smelting
Device 10 includes at least one first side-blown spray gun 11, and the nozzle of the first side-blown spray gun 11 is immersed in molten through the second feed opening 102
The liquid level in the molten bath in pond smelting apparatus 10 is hereinafter, to spray into fuel and oxygen-enriched air to molten bath.Using the first side-blown spray gun 11
Fuel and oxygen-enriched air, which are sprayed into bath smelting device 10, to form strong agitation to molten liquid therein, to be conducive to mention
High mass-and heat-transfer efficiency, meanwhile, this is also beneficial to the rate of recovery for improving subsequent vanadium etc..
In a kind of preferred embodiment, electrothermal reduction device 20 includes: at least one electrode 21, at least one second side
Rifle 22 and at least one top-blown spray gun 23 are blowed and sprayed, the end of electrode 21 is located at below the liquid phase material in electrothermal reduction device 20,
For to electrothermal reduction process heat supply；The nozzle of second side-blown spray gun 22 and the nozzle of top-blown spray gun 23 are respectively positioned on electrothermal reduction dress
The ullage in 20 is set, for spraying reductant into electrothermal reduction device 20；Preferably, each second side-blown spray gun 22 is set respectively
It sets on the opposite side wall of electrothermal reduction device 20.Preferably, electrode 21 is graphite electrode.
It is sprayed reductant into using the second side-blown spray gun 22 and/or top-blown spray gun 23 and molten liquid and reducing agent can be improved
Contact area, so that the two is sufficiently reacted.The ullage by reducing agent in electrothermal reduction device 20 sprays into simultaneously, is conducive to press down
The addition of raw material processed causes to stir to the liquid level of electrothermal reduction device 20, to reduce it to vanadium-bearing hot metal during dilution and titanium
The influence of the separative efficiency of slag.
A certain amount of flue gas can be generated in above-mentioned fusion process, for the ease of the discharge of flue gas, it is preferable that bath smelting dress
It sets 10 and is additionally provided with the first flue 12, the first flue 12 is connected with the molten bath of bath smelting device 10.Preferably, electrothermal reduction
Device 20 is additionally provided with the second flue 24, and the second flue 24 is connected with the reduction chamber of electrothermal reduction device 20.
The application is described in further detail below in conjunction with specific embodiment, these embodiments should not be understood as limitation originally
Apply for range claimed.
The group of iron-based polymetallic ore material becomes 45~62wt% of Fe, TiO in embodiment 1 to 827~20wt%, V2O5
0.1~1.2wt%, remaining is impurity, and process flow is as shown in Figure 1.
Embodiment 1
As shown in Fig. 2 to 5, bath smelting device includes the bath smelting device 10 and electrothermal reduction device 20 being connected,
Bath smelting device 10 is provided with the first feed opening 101 and the second feed opening 102, and the setting of the first feed opening 101 is molten in molten bath
The top of device 10 is refined, the second feed opening 102 is arranged on the side wall of bath smelting device 10, and electrothermal reduction device 20 is provided with
Slag-drip opening 201 and metal discharge mouth 202.The nozzle of first side-blown spray gun 11 is immersed in bath smelting dress through the second feed opening 102
The liquid level in the molten bath in 10 is set hereinafter, to spray into fuel and oxygen-enriched air to molten bath.
Electrothermal reduction device 20 sets 3 electrodes 21 (self-baking electrode), using Alternating Current Power Supply.If second side-blown spray gun 22
With a top-blown spray gun 23.The end of each electrode 21 is located at below the liquid phase material of electrothermal reduction device 20, is used for electric heating also
Former process heat supply；The nozzle of second side-blown spray gun 22 is located at the ullage of electrothermal reduction device 20, for spraying reductant into
Electrothermal reduction device 20.Reduction melting temperature is 1600 DEG C in smelting process.
Through above-mentioned fusion process, the rate of recovery of vanadium is 95wt%, and the rate of recovery of ferro element is 87wt%.
Embodiment 2
With the difference of embodiment 1 are as follows:
Immersion side-blown spray gun is not used to spray into fuel in bath smelting device 10.
Through above-mentioned fusion process, the rate of recovery of vanadium is 93wt%, and the rate of recovery of ferro element is 88wt%, comprehensive energy consumption
Than example 1 high 7%.
Embodiment 3
With the difference of embodiment 1 are as follows: the temperature of reduction melting is 1550 DEG C.
Through above-mentioned fusion process, the rate of recovery of vanadium is 84wt%, and the rate of recovery of ferro element is 83wt%, comprehensive energy consumption
Than example 1 high 6%.
Embodiment 4
With the difference of embodiment 1 are as follows: enter furnace material and be added from the first feed opening 101, do not passed through from the second feed opening 102 lazy
Property gas spray into.
Through above-mentioned fusion process, the rate of recovery of vanadium is 92wt%, and the rate of recovery of ferro element is 85wt%, comprehensive energy consumption
Than example 1 high 5%.
Embodiment 5
With the difference of embodiment 1 are as follows: enter furnace material a part and be added from the first feed opening 101, another part is simultaneously from the
Two feed openings 102 spray into.
Through above-mentioned fusion process, the rate of recovery of vanadium is that the rate of recovery of vanadium is 98wt%, the rate of recovery of ferro element
For 87wt%.
Embodiment 6
With the difference of embodiment 1 are as follows: the quantity of electrode 21 is 2.
Through above-mentioned fusion process, the rate of recovery of vanadium is that the rate of recovery of vanadium is 94wt%, the rate of recovery of ferro element
For 87wt%.
Embodiment 7
With the difference of embodiment 1 are as follows: the material of electrode 21 is graphite electrode.
Through above-mentioned fusion process, the rate of recovery of vanadium is that the rate of recovery of vanadium is 92wt%, the rate of recovery of ferro element
For 86wt%.
Embodiment 8
With the difference of embodiment 1 are as follows: reducing agent is added using top-blown spray gun 23.
Through above-mentioned fusion process, the rate of recovery of vanadium is 94wt%, and the rate of recovery of ferro element is 87wt%, comprehensive energy consumption
Than example 1 high 5%.
It can be seen from the above description that the above embodiments of the present invention realized the following chievements: compared to existing
Some smelting processes, the application can effectively improve vanadium using the technique that efficient bath smelting is combined with electrothermal reduction
The rate of recovery, while also having and reduce comprehensive energy consumption, promote the advantages such as environment discharge index.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (15)
1. a kind of method of smelting of iron-based polymetallic ore material, the iron-based polymetallic ore material includes ferro element, titanium elements and vanadium unit
Element, which is characterized in that the smelting system that the method for smelting uses include the bath smelting device (10) being connected and electric heating also
Original device (20), the bath smelting device (10) are provided with the first feed opening (101) and the second feed opening (102), and described
First feed opening (101) setting is arranged in the top of the bath smelting device (10), second feed opening (102) described
On the side wall of bath smelting device (10), the electrothermal reduction device (20) is provided with slag-drip opening (201) and metal discharge mouth
(202), the method for smelting includes:
The iron-based polymetallic ore material, fuel, flux and oxygen-enriched air are delivered in the bath smelting device (10) and carried out
Melting and partial reduction, obtain molten liquid；
The molten liquid and reducing agent are delivered to the electrothermal reduction device (20) and carry out reduction melting, obtain molten iron and is melted
Slag.
2. method of smelting according to claim 1, which is characterized in that the bath smelting device (10) is side-blown immersion
Bath smelting device, the melting step include: to fill the iron-based polymetallic ore material and the flux through the bath smelting
The molten bath of the bath smelting device (10) is added in the first feed opening (101) and/or second feed opening (102) of setting (10)
In, and at least one first side-blown spray gun (11) is immersed in the molten bath, then use first side-blown spray gun (11)
The fuel and the oxygen-enriched air are sprayed into the molten bath, to carry out the melting and partial reduction process, obtained described molten
Melt liquid；
Preferably, the temperature of the melting step is 1450~1650 DEG C, preferably 1500~1600 DEG C；
Preferably, the fuel is selected from one of group of natural gas, coal gas and fine coal composition or a variety of；
Preferably, the oxygen-enriched air is that the volumetric concentration of oxygen is greater than 50% gas.
3. method of smelting according to claim 1, which is characterized in that the step of the reduction melting further include: will be described
Molten liquid is delivered in the electrothermal reduction device (20), using the second side-blown spray gun (22) and/or top-blown spray gun (23) by institute
State the ullage that reducing agent sprays into the electrothermal reduction device (20).
4. method of smelting according to any one of claim 1 to 3, which is characterized in that the temperature of the reduction melting step
Degree is 1450~1650 DEG C；Preferably, the temperature of the reduction melting step is 1500~1600 DEG C.
5. method of smelting according to claim 2 or 3, which is characterized in that carrying out the melting and partial reduction step
Before, the method for smelting further include: to the iron-based polymetallic ore material, the fuel, the flux and the reducing agent point
Do not pre-processed, with the granularity of the iron-based polymetallic ore material, the fuel, the flux and the reducing agent≤-
50mm, water content≤15wt%；
Preferably, the bath smelting system further includes and first feed opening (101) and/or the second feed opening (102) phase
The cylinder mixing device (30) of connection, before carrying out in the melting step, the method for smelting further includes using the circle
Cylinder mixing device (30) carries out mixing.
6. method of smelting according to claim 1, which is characterized in that the smelting system further includes waste-heat recovery device
(40), the method for smelting further includes the steps that the step of waste heat recycles, and the waste heat recycles includes: to recycle using the waste heat
The heat in flue gas generated in device (40) the recycling melting step and the reduction melting step；
Preferably, the waste-heat recovery device (40) is waste heat boiler.
7. method of smelting according to claim 6, which is characterized in that after the waste heat recovery processing, the flue gas
Temperature is down to 100~200 DEG C.
8. method of smelting according to claim 6, which is characterized in that the smelting system further includes dust arrester installation (50),
The method of smelting further include: after the flue gas is carried out the waste heat recovery processing, carried out using the dust arrester installation (50)
It gathers dust processing.
9. method of smelting according to claim 1, which is characterized in that account for the weight percent of the iron-based polymetallic ore material
Content meter, the dosage of the flux are 0~20%.
10. method of smelting according to claim 1, which is characterized in that the iron-based polymetallic ore material is selected from v-ti magnetite
Mine and/or sea sand mine.
11. a kind of smelting apparatus for handling iron-based polymetallic ore material, the iron-based polymetallic ore material include ferro element, titanium elements and
Vanadium, which is characterized in that the smelting apparatus includes:
Bath smelting device (10), the bath smelting device (10) are provided with the first feed opening (101) and the second feed opening
(102) and molten liquid outlet, and first feed opening (101) setting is at the top of the bath smelting device (10), described
Second feed opening (102) is arranged on the side wall of the bath smelting device (10)；And
Electrothermal reduction device (20), the electrothermal reduction device (20) be provided with slag-drip opening (201) and metal discharge mouth (202) and
Molten liquid entrance, the molten liquid entrance are connected with molten liquid outlet.
12. smelting apparatus according to claim 11, which is characterized in that the bath smelting device (10) is side-blown submergence
Formula bath smelting device, the bath smelting device (10) include at least one first side-blown spray gun (11), and described first is side-blown
The nozzle of spray gun (11) be immersed in through second feed opening (102) liquid level in the molten bath in the bath smelting device (10) with
Under, to spray into fuel and oxygen-enriched air to the molten bath.
13. smelting apparatus according to claim 11 or 12, which is characterized in that the electrothermal reduction device (20) includes:
At least one electrode (21), the end of the electrode (21) are located under the liquid phase material in the electrothermal reduction device (20)
Side is used for the electrothermal reduction process heat supply；
At least one second side-blown spray gun (22) and at least one top-blown spray gun (23), the nozzle of second side-blown spray gun (22)
It is respectively positioned on the ullage in the electrothermal reduction device (20) with the nozzle of the top-blown spray gun (23), for spraying reducing agent
Enter the electrothermal reduction device (20)；Preferably, each second side-blown spray gun (22) is separately positioned on the electrothermal reduction dress
It sets on the opposite side wall of (20).
14. smelting apparatus according to claim 11 or 12, which is characterized in that the bath smelting device (10) also sets up
Have the first flue (12), first flue (12) is connected with the molten bath of the bath smelting device (10).
15. smelting apparatus according to claim 14, which is characterized in that the electrothermal reduction device (20) is additionally provided with
Two flues (24), second flue (24) are connected with the reduction chamber of the electrothermal reduction device (20).
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| CN111235389A (en) * | 2020-03-30 | 2020-06-05 | 中国恩菲工程技术有限公司 | Smelting method and device of vanadium titano-magnetite |
| CN111394588A (en) * | 2020-05-12 | 2020-07-10 | 中国恩菲工程技术有限公司 | Method and device for directly producing iron-vanadium-chromium alloy by treating vanadium extraction tailings |
| CN114990273A (en) * | 2022-04-22 | 2022-09-02 | 中国恩菲工程技术有限公司 | Oxygen-enriched side-blown jet smelting method and smelting device for high-phosphorus iron ore |
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