CN106811595A - The system and method for processing vanadium titano-magnetite - Google Patents
The system and method for processing vanadium titano-magnetite Download PDFInfo
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- CN106811595A CN106811595A CN201710184727.3A CN201710184727A CN106811595A CN 106811595 A CN106811595 A CN 106811595A CN 201710184727 A CN201710184727 A CN 201710184727A CN 106811595 A CN106811595 A CN 106811595A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/02—Roasting processes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C1/00—Magnetic separation
- B03C1/005—Pretreatment specially adapted for magnetic separation
- B03C1/015—Pretreatment specially adapted for magnetic separation by chemical treatment imparting magnetic properties to the material to be separated, e.g. roasting, reduction, oxidation
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B34/00—Obtaining refractory metals
- C22B34/20—Obtaining niobium, tantalum or vanadium
- C22B34/22—Obtaining vanadium
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Abstract
The system and method that the present invention proposes treatment vanadium titano-magnetite, the system includes：Breaker, with feed coal entrance and feed coal particle outlet；Fine grinding device, with vanadium titano-magnetite entrance and vanadium titano-magnetite particle outlet；Rapid pyrolysis apparatus, with feed coal particle entrance, vanadium titano-magnetite particle entrance, offgas outlet and contain semicoke and vanadium titanium sponge iron mixed material outlet, feed coal particle entrance is connected with feed coal particle outlet, and vanadium titano-magnetite particle entrance is connected with vanadium titano-magnetite particle outlet；Concentration equipment, with mixed material entrance, the outlet of vanadium titanium sponge iron and semicoke outlet, mixed material entrance is connected with containing semicoke and the outlet of vanadium titanium sponge iron mixed material.The system organically combines Coal Chemical Industry and metallurgical production, both the high efficiente callback of vanadium iron titanium resource can have been realized, production cost can have also been significantly reduced so that is more than production cost 26 yuan/ton of sponge iron of reduction, production equipment input reduces by more than 25%, energy consumption reduction by more than 10%.
Description
Technical field
The invention belongs to field of chemical metallurgical technology, specifically, the present invention relates to process vanadium titano-magnetite system and
Method.
Background technology
How schreyerite, with high comprehensive utilization value, makes good use of schreyerite as a kind of complex iron ore resource, plays
The sharpest edges of resource, it is always that metallurgical boundary's researcher makes great efforts target that ferrovanadium titanium is reclaimed comprehensively.
Schreyerite is smelted using the non-blast furnace coal-based direct reduction flow of traditional blast furnace process and foreign countries, is only reclaimed
Iron and vanadium, titanium enter blast furnace slag, and the too low temporarily recovery value without economical rationality of titanium grade therein causes a large amount of streams of titanium resource
Lose.Meanwhile, coke must be used using blast furnace, but whole world coking coal resource is nervous, and process of coking can produce a large amount of dust
And pernicious gas, severe contamination environment；And on the one hand reduction atmospheric pressure is higher to use non-blast furnace process, to the bearing capacity of equipment
It is required that high, another aspect whole flow process high energy consumption, technological process are long, and economy is not obvious.
Therefore the technology of existing treatment vanadium titano-magnetite is further improved.
The content of the invention
It is contemplated that at least solving one of technical problem in correlation technique to a certain extent.Therefore, of the invention
One purpose is to propose a kind of system and method for processing vanadium titano-magnetite.The system is by Coal Chemical Industry and the organic knot of metallurgical production
Close, can both realize the high efficiente callback of vanadium iron titanium resource, can also significantly reduce production cost so that 26 yuan of production cost reduction/
More than ton sponge iron, production equipment input reduces by more than 25%, energy consumption reduction by more than 10%.
In one aspect of the invention, the present invention proposes a kind of system for processing vanadium titano-magnetite, of the invention
Embodiment, the system includes：
Breaker, the breaker has feed coal entrance and feed coal particle outlet；
Fine grinding device, the fine grinding device has vanadium titano-magnetite entrance and vanadium titano-magnetite particle outlet；
Rapid pyrolysis apparatus, the rapid pyrolysis apparatus have feed coal particle entrance, vanadium titano-magnetite particle entrance, tail
Gas exports and contains semicoke and the outlet of vanadium titanium sponge iron mixed material, the feed coal particle entrance and the raw material coal particle
Outlet is connected, and the vanadium titano-magnetite particle entrance is connected with the vanadium titano-magnetite particle outlet；
There is concentration equipment, the concentration equipment mixed material entrance, the outlet of vanadium titanium sponge iron and semicoke to export, described mixed
Material inlet is closed to be connected containing semicoke and the outlet of vanadium titanium sponge iron mixed material with described.
The system for the treatment of vanadium titano-magnetite according to embodiments of the present invention is supplied to fast speed heat by coal and vanadium titano-magnetite
In solution device, vanadium titano-magnetite is reduced using the also Primordial Qi in the pyrolysis gas that pyrolysis of coal is produced, can be not only prepared into
To the semicoke product of high-quality, and the high efficiente callback of vanadium ferrotianium resource can be realized.Thus, vanadium is both realized using the system
The high efficiente callback of vanadium ferrotianium resource, can also significantly reduce production cost in titanomagnetite so that 26 yuan/ton of seas of production cost reduction
More than continuous iron, production equipment input reduces more than 25%, and energy consumption reduction by more than 10% significantly improves the production competition of this technology
Power.
In addition, the system for the treatment of vanadium titano-magnetite according to the above embodiment of the present invention can also have following additional skill
Art feature：
In some embodiments of the invention, the rapid pyrolysis apparatus are pyrolysis oven, preferably radiant tube electricity or gas heating
Formula pyrolysis oven.Thus, it is possible to realize the high efficiente callback of vanadium ferrotianium resource in vanadium titano-magnetite.
In another aspect of the invention, the present invention proposes a kind of system using above-mentioned treatment vanadium titano-magnetite and processes
The method of vanadium titano-magnetite, embodiments in accordance with the present invention, the method includes：
(1) supplying to the breaker feed coal carries out break process, to obtain raw material coal particle；
(2) supplying to the fine grinding device vanadium titano-magnetite carries out fine grinding treatment, to obtain vanadium titano-magnetite particle；
(3) supplying the raw material coal particle carries out pyrolysis processing into the rapid pyrolysis apparatus, to be pyrolyzed
Gas and semicoke, then the vanadium titano-magnetite particle is supplied into the rapid pyrolysis apparatus occur with the pyrolysis gases contact
Reduction reaction, obtains tail gas and vanadium titanium sponge iron；
(4) mixed material containing semicoke and vanadium titanium sponge iron that step (3) is obtained is supplied into the concentration equipment
Magnetic separation separation is carried out, to obtain semicoke and vanadium titanium sponge iron.
The method for the treatment of vanadium titano-magnetite according to embodiments of the present invention is supplied to fast speed heat by coal and vanadium titano-magnetite
In solution device, vanadium titano-magnetite is reduced using the also Primordial Qi in the pyrolysis gas that pyrolysis of coal is produced, can be not only prepared into
To the semicoke product of high-quality, and the high efficiente callback of vanadium ferrotianium resource can be realized.Thus, vanadium is both realized using the method
The high efficiente callback of vanadium ferrotianium resource, can also significantly reduce production cost in titanomagnetite so that 26 yuan/ton of seas of production cost reduction
More than continuous iron, production equipment input reduces more than 25%, and energy consumption reduction by more than 10% significantly improves the production competition of this technology
Power.
In addition, the method for the treatment of vanadium titano-magnetite according to the above embodiment of the present invention can also have following additional skill
Art feature：
In some embodiments of the invention, in step (1), the particle diameter of the raw material coal particle is 0.5-4mm.By
This, is conducive to improving the pyrolysis efficiency of raw material coal particle.
In some embodiments of the invention, in step (1), the feed coal is selected from high-order coal, scala media coal and low
At least one of rank coal.Thus, be conducive to improving the scope of application of this technique.
In some embodiments of the invention, in step (2), the particle diameter of the vanadium titano-magnetite particle is that 10-150 is micro-
Rice accounting more than 80%.Thus, be conducive to improving the reduction efficiency of vanadium titano-magnetite particle.
In some embodiments of the invention, in step (3), the temperature of the pyrolysis processing is 700-900 degrees Celsius.
Thus, can further improve the reduction efficiency of vanadium titano-magnetite particle.
In some embodiments of the invention, in step (3), the raw material coal particle and the vanadium titano-magnetite particle
Addition speed ratio be (3~6)：1.Thus, can further improve the reduction efficiency of vanadium titano-magnetite particle.
In some embodiments of the invention, in step (3), when the pyrolysis gas are caused in the rapid pyrolysis apparatus
When pressure is 0.15~1Mpa, then the vanadium titano-magnetite particle is supplied to the rapid pyrolysis apparatus.Thus, can be further
Improve the reduction efficiency of vanadium titano-magnetite particle.
Additional aspect of the invention and advantage will be set forth in part in the description, and will partly become from the following description
Obtain substantially, or recognized by practice of the invention.
Brief description of the drawings
Of the invention above-mentioned and/or additional aspect and advantage will become from description of the accompanying drawings below to embodiment is combined
Substantially and be readily appreciated that, wherein：
Fig. 1 is the system structure diagram for the treatment of vanadium titano-magnetite according to an embodiment of the invention；
Fig. 2 is the method flow schematic diagram for the treatment of vanadium titano-magnetite according to an embodiment of the invention.
Specific embodiment
Embodiments of the invention are described below in detail, the example of the embodiment is shown in the drawings, wherein from start to finish
Same or similar label represents same or similar element or the element with same or like function.Below with reference to attached
It is exemplary to scheme the embodiment of description, it is intended to for explaining the present invention, and be not considered as limiting the invention.
In the present invention, unless otherwise clearly defined and limited, term " installation ", " connected ", " connection ", " fixation " etc.
Term should be interpreted broadly, for example, it may be fixedly connected, or be detachably connected, or integrally；Can be that machinery connects
Connect, or electrically connect；Can be joined directly together, it is also possible to be indirectly connected to by intermediary, can be in two elements
The connection in portion or two interaction relationships of element, unless otherwise clearly restriction.For one of ordinary skill in the art
For, can as the case may be understand above-mentioned term concrete meaning in the present invention.
In one aspect of the invention, the present invention proposes a kind of system for processing vanadium titano-magnetite, of the invention
Embodiment, with reference to Fig. 1, the system includes：Breaker 100, fine grinding device 200, rapid pyrolysis apparatus 300 and concentration equipment
400。
Embodiments in accordance with the present invention, breaker 100 has feed coal entrance 101 and feed coal particle outlet 102, and
It is suitable to for feed coal to carry out break process, to obtain raw material coal particle.Specifically, being carried out during feed coal is delivered into breaker
Break process, is then dried to remove the moisture in raw material coal particle.Inventor has found, is broken by by feed coal
It is broken, the specific surface area of raw material coal particle is remarkably improved, thus, be conducive to improving raw material coal particle in follow-up rapid pyrolysis apparatus
In pyrolysis efficiency, carry out drying and processing by raw material coal particle, the moisture in raw material coal particle can be removed, thus can improve
Vanadium titano-magnetite particle goes back in the reproducibility of pyrolysis gas obtained by feed coal particle pyrolysis, and then the follow-up rapid pyrolysis apparatus of raising
Former efficiency.
According to one embodiment of present invention, the particle diameter of raw material coal particle is not particularly restricted, those skilled in the art
Member can be selected according to actual needs, a specific embodiment of the invention, and the particle diameter of raw material coal particle can be
0.5-4mm.Inventor has found, if raw material coal particle is meticulous so that follow-up products obtained therefrom semicoke and vanadium titanium sponge iron are difficult to point, and
If raw material coal particle is excessively thick, cause heat transfer rate slow, pyrolysis rate is low, reduces pyrolysis gas yield.Thus, using the application scope
Raw material coal particle can not only significantly improve pyrolysis gas yield, and the yield of follow-up gained vanadium ferrotianium can be significantly improved.
According to still a further embodiment, the particular type of feed coal is not particularly restricted, the technology of this area
Personnel can be selected according to actual needs, a specific embodiment of the invention, and feed coal can be selected from high-order
At least one of coal, scala media coal and low-order coal.Specifically, high-order coal can be lignite, scala media coal can be bituminous coal, low-order coal
It can be anthracite.Thus, it is remarkably improved the economic adaptability of this technique.
There is embodiments in accordance with the present invention, fine grinding device 200 vanadium titano-magnetite entrance 201 and vanadium titano-magnetite particle to go out
Mouth 202, and be suitable to for vanadium titano-magnetite to carry out fine grinding treatment, to obtain vanadium titano-magnetite particle.Inventor has found, by inciting somebody to action
Vanadium titano-magnetite carries out fine grinding treatment, is remarkably improved the specific surface area of vanadium titano-magnetite particle, is thus remarkably improved vanadium titanium
The reduction efficiency of magnetite ore particles.
According to one embodiment of present invention, the particle diameter of vanadium titano-magnetite particle is not particularly restricted, the skill of this area
Art personnel can be selected according to actual needs, a specific embodiment of the invention, the grain of vanadium titano-magnetite particle
Footpath can be 10-150 microns of accounting more than 80%.Inventor has found that, if vanadium titano-magnetite particle is meticulous, pyrolysis gas of coming out of the stove are taken out of
Vanadium titano-magnetite and vanadium titanium DRI Dust Capacities are big, cause iron ore deposit to waste；And particle is excessively thick, vanadium titano-magnetite and pyrolysis in stove
Gas and coal contact area is small, heat transfer rate slow, reduction rate reduction, reduction effect is poor.Thus, using the application particle size range
Vanadium titano-magnetite particle can realize the high efficiente callback of follow-up vanadium iron titanium resource.
Embodiments in accordance with the present invention, rapid pyrolysis apparatus 300 have feed coal particle entrance 301, vanadium titano-magnetite
Grain entrance 302, offgas outlet 303 and contain semicoke and vanadium titanium sponge iron mixed material outlet 304, feed coal particle entrance
301 are connected with feed coal particle outlet 102, and vanadium titano-magnetite particle entrance 302 is connected with vanadium titano-magnetite particle outlet 202,
And be suitable to for raw material coal particle to carry out pyrolysis processing, pyrolysis gas and semicoke are obtained, then vanadium titano-magnetite particle connects with pyrolysis gas
The raw reduction reaction of triggering, obtains tail gas and vanadium titanium sponge iron, and the semicoke for obtaining and vanadium titanium sponge iron are gone out in the form of mixed material
Material.Specifically, raw material coal particle passes through feed auger continuous charging, feed coal from the top feed bin of rapid pyrolysis apparatus first
Grain stops 3-6s in rapid pyrolysis apparatus, and the pyrolysis of raw material coal particle heated fast is pyrolyzed generation solid half during descending
Burnt and pyrolysis gas, the main component of pyrolysis gas is the reducibility gas such as hydrogen, carbon monoxide and methane, when in rapid pyrolysis apparatus
During full of fast pyrogenation gas, i.e., when the pressure in rapid pyrolysis apparatus reaches 0.15~1MPa, from vanadium titano-magnetite particle feed bin
Continuous-feeding, vanadium titano-magnetite particle stops 6-15s in stove, and the ferriferous oxide in vanadium titano-magnetite particle is quickly reduced to
Metallic iron, while the methane cracking that the vanadium titanium sponge iron of gained can be catalyzed in pyrolysis gas is hydrogen and carbon monoxide again, so may be used
Further improve the reduction efficiency of vanadium titano-magnetite particle.Vanadium titano-magnetite particle is reduced to the primary chemical of vanadium titanium sponge iron
Reaction equation is：
H2+Fe2O3=2FeO+H2O (1)
H2+ FeO=Fe+H2O (2)
CO+Fe2O3=2FeO+CO2 (3)
CO+FeO=Fe+CO2 (4)
According to one embodiment of present invention, rapid pyrolysis apparatus are not particularly restricted, and those skilled in the art can
To be selected according to actual needs, a specific embodiment of the invention, rapid pyrolysis apparatus can be pyrolysis oven, excellent
Select radiant tube electricity or gas heated type pyrolysis oven.Thus, it is remarkably improved the pyrolysis efficiency of raw material coal particle in rapid pyrolysis apparatus
With the reduction efficiency of vanadium titano-magnetite particle.
According to still a further embodiment, the temperature of pyrolysis processing is not particularly restricted, those skilled in the art
Member can be selected according to actual needs, a specific embodiment of the invention, and the temperature of pyrolysis processing can be
700-900 degrees Celsius.Inventor has found, if temperature is too high, can dramatically increase energy consumption, and reduction and pyrolytic reaction are anti-heat absorptions
Should, temperature is too low, and thermodynamic condition is poor, pyrolysis tolerance reduction, and reduction effect is deteriorated, and inventor has found the application temperature model
Enclose and be substantially better than the reduction effect that other temperature conditionss significantly improve schreyerite.
According to still another embodiment of the invention, raw material coal particle is not received with the addition speed ratio of vanadium titano-magnetite particle
Especially limitation, those skilled in the art can be selected according to actual needs, a specific embodiment of the invention,
Raw material coal particle can be (3~6) with the addition speed ratio of vanadium titano-magnetite particle：1.Inventor has found, if coal particle is added
Excessive velocities, coal addition excess, heat consumption increases；And coal particle adds speed too low, reduction tolerance is few, and reduction effect is poor.By
This, the reduction effect of schreyerite can be significantly improved using the charging rate of the application scope.
There is embodiments in accordance with the present invention, concentration equipment 400 mixed material entrance 401, vanadium titanium sponge iron to export 402 and
Semicoke outlet 403, mixed material entrance 401 with export 304 containing semicoke and vanadium titanium sponge iron mixed material and be connected, and be suitable to by
Mixed material containing semicoke and vanadium titanium sponge iron carries out magnetic separation separation, to obtain semicoke and vanadium titanium sponge iron.Invention human hair
Existing, in the mixed material containing semicoke and vanadium titanium sponge iron, semicoke is different with the physical property of vanadium titanium sponge iron, vanadium titanium sponge iron tool
It is magnetic, and semicoke does not have, in this way, can separate semicoke and vanadium titanium sponge iron by magnetic separation, respectively obtains value high
Vanadium titanium sponge iron and semicoke.
The system for the treatment of vanadium titano-magnetite according to embodiments of the present invention is supplied to fast speed heat by coal and vanadium titano-magnetite
In solution device, vanadium titano-magnetite is reduced using the also Primordial Qi in the pyrolysis gas that pyrolysis of coal is produced, can be not only prepared into
To the semicoke product of high-quality, and the high efficiente callback of vanadium ferrotianium resource can be realized.Thus, vanadium is both realized using the system
The high efficiente callback of vanadium ferrotianium resource, can also significantly reduce production cost in titanomagnetite so that 26 yuan/ton of seas of production cost reduction
More than continuous iron, production equipment input reduces more than 25%, and energy consumption reduction by more than 10% significantly improves the production competition of this technology
Power.
In another aspect of the invention, the present invention proposes a kind of system using above-mentioned treatment vanadium titano-magnetite and processes
The method of vanadium titano-magnetite, embodiments in accordance with the present invention, with reference to Fig. 2, the method includes：
S100：Feed coal is supplied to breaker carries out break process
In the step, feed coal is supplied to breaker carries out break process, to obtain raw material coal particle.Specifically
, break process is carried out during feed coal is delivered into breaker, then dried to remove the moisture in raw material coal particle.Hair
Person of good sense's discovery, is crushed by by feed coal, is remarkably improved the specific surface area of raw material coal particle, thus, is conducive to improving
Pyrolysis efficiency of the raw material coal particle in follow-up rapid pyrolysis apparatus, drying and processing is carried out by raw material coal particle, can be removed
Moisture in raw material coal particle, thus can improve the reproducibility of feed coal particle pyrolysis gained pyrolysis gas, and then improve follow-up fast
The reduction efficiency of vanadium titano-magnetite particle in fast pyrolysis installation.
According to one embodiment of present invention, the particle diameter of raw material coal particle is not particularly restricted, those skilled in the art
Member can be selected according to actual needs, a specific embodiment of the invention, and the particle diameter of raw material coal particle can be
0.5-4mm.Inventor has found, if raw material coal particle is meticulous so that follow-up products obtained therefrom semicoke and vanadium titanium sponge iron are difficult to point, and
If raw material coal particle is excessively thick, cause heat transfer rate slow, pyrolysis rate is low, reduces pyrolysis gas yield.Thus, using the application scope
Raw material coal particle can not only significantly improve pyrolysis gas yield, and the yield of follow-up gained vanadium ferrotianium can be significantly improved.
According to still a further embodiment, the particular type of feed coal is not particularly restricted, the technology of this area
Personnel can be selected according to actual needs, a specific embodiment of the invention, and feed coal can be selected from high-order
At least one of coal, scala media coal and low-order coal.Specifically, high-order coal can be lignite, scala media coal can be bituminous coal, low-order coal
It can be anthracite.Thus, it is remarkably improved the economic adaptability of this technique.
S200：Vanadium titano-magnetite is supplied to fine grinding device carries out fine grinding treatment
In the step, vanadium titano-magnetite is supplied to fine grinding device carries out fine grinding treatment, to obtain vanadium titano-magnetite
Grain.Inventor's discovery, fine grinding treatment is carried out by by vanadium titano-magnetite, is remarkably improved the specific surface of vanadium titano-magnetite particle
Product, is thus remarkably improved the reduction efficiency of vanadium titano-magnetite particle.
According to one embodiment of present invention, the particle diameter of vanadium titano-magnetite particle is not particularly restricted, the skill of this area
Art personnel can be selected according to actual needs, a specific embodiment of the invention, the grain of vanadium titano-magnetite particle
Footpath can be 10-150 microns of accounting more than 80%.Inventor has found that, if vanadium titano-magnetite particle is meticulous, pyrolysis gas of coming out of the stove are taken out of
Vanadium titano-magnetite and vanadium titanium DRI Dust Capacities are big, cause iron ore deposit to waste；And particle is excessively thick, vanadium titano-magnetite and pyrolysis in stove
Gas and coal contact area is small, heat transfer rate slow, reduction rate reduction, reduction effect is poor.Thus, using the application particle size range
Vanadium titano-magnetite particle can realize the high efficiente callback of follow-up vanadium iron titanium resource.
S300：Raw material coal particle is supplied into rapid pyrolysis apparatus carries out pyrolysis processing, then by vanadium titano-magnetite
There is reduction reaction with pyrolysis gases contact in grain supply to rapid pyrolysis apparatus
In the step, raw material coal particle is supplied into rapid pyrolysis apparatus carries out pyrolysis processing, obtains pyrolysis gas and half
Jiao, then vanadium titano-magnetite particle supply into rapid pyrolysis apparatus with pyrolysis gases contact occur reduction reaction, obtain tail gas and
Vanadium titanium sponge iron, the semicoke for obtaining and vanadium titanium sponge iron are discharged in the form of mixed material.Specifically, first raw material coal particle from
The top feed bin of rapid pyrolysis apparatus stops 3- by feed auger continuous charging, raw material coal particle in rapid pyrolysis apparatus
6s, raw material coal particle heated fast pyrolysis, during descending be pyrolyzed generation solid semicoke and pyrolysis gas, pyrolysis gas it is main into
It is divided into the reducibility gas such as hydrogen, carbon monoxide and methane, when fast pyrogenation gas is full of in rapid pyrolysis apparatus, i.e., fast speed heat
When pressure in solution device reaches 0.15~1MPa, from vanadium titano-magnetite particle feed bin continuous-feeding, vanadium titano-magnetite particle exists
6-15s is stopped in stove, the ferriferous oxide in vanadium titano-magnetite particle is quickly reduced to metallic iron, while the vanadium titanium sponge of gained
The methane cracking that iron can be catalyzed in pyrolysis gas again is hydrogen and carbon monoxide, so can further improve vanadium titano-magnetite particle
Reduction efficiency.The main chemical reactions formula that vanadium titano-magnetite particle is reduced to vanadium titanium sponge iron is：
H2+Fe2O3=2FeO+H2O (1)
H2+ FeO=Fe+H2O (2)
CO+Fe2O3=2FeO+CO2 (3)
CO+FeO=Fe+CO2 (4)
According to one embodiment of present invention, the temperature of pyrolysis processing is not particularly restricted, those skilled in the art
Can be selected according to actual needs, a specific embodiment of the invention, the temperature of pyrolysis processing can be 700-
900 degrees Celsius.Inventor has found, if temperature is too high, can dramatically increase energy consumption, and reduction and pyrolytic reaction are the endothermic reactions, temperature
Spend low, thermodynamic condition is poor, pyrolysis tolerance reduction, reduction effect is deteriorated, and inventor has found that the application temperature range is bright
The aobvious reduction effect that schreyerite is significantly improved better than other temperature conditionss.
According to still a further embodiment, raw material coal particle is not received with the addition speed ratio of vanadium titano-magnetite particle
Especially limitation, those skilled in the art can be selected according to actual needs, a specific embodiment of the invention,
Raw material coal particle can be (3~6) with the addition speed ratio of vanadium titano-magnetite particle：1.Inventor has found, if coal particle is added
Excessive velocities, coal addition excess, heat consumption increases；And coal particle adds speed too low, reduction tolerance is few, and reduction effect is poor.By
This, the reduction effect of schreyerite can be significantly improved using the charging rate of the application scope.
S400：Mixed material containing semicoke and vanadium titanium sponge iron is supplied into concentration equipment carries out magnetic separation separation
In the step, the mixed material containing semicoke and vanadium titanium sponge iron is supplied into concentration equipment carries out magnetic separation point
From to obtain semicoke and vanadium titanium sponge iron.Inventor has found, in the mixed material containing semicoke and vanadium titanium sponge iron, half
Burnt different with the physical property of vanadium titanium sponge iron, vanadium titanium sponge iron has magnetic, and semicoke does not have, in this way, can be by magnetic separation by semicoke
Separated with vanadium titanium sponge iron, respectively obtain the vanadium titanium sponge iron and semicoke of value high.
The method for the treatment of vanadium titano-magnetite according to embodiments of the present invention is supplied to fast speed heat by coal and vanadium titano-magnetite
In solution device, vanadium titano-magnetite is reduced using the also Primordial Qi in the pyrolysis gas that pyrolysis of coal is produced, can be not only prepared into
To the semicoke product of high-quality, and the high efficiente callback of vanadium ferrotianium resource can be realized.Thus, vanadium is both realized using the method
The high efficiente callback of vanadium ferrotianium resource, can also significantly reduce production cost in titanomagnetite so that 26 yuan/ton of seas of production cost reduction
More than continuous iron, production equipment input reduces more than 25%, and energy consumption reduction by more than 10% significantly improves the production competition of this technology
Power.
Below with reference to specific embodiment, present invention is described, it is necessary to explanation, these embodiments are only description
Property, and the present invention is limited never in any form.
Embodiment 1
Feed coal is crushed to 0.5~3mm, it is stand-by to be transported to fast pyrogenation furnace roof portion feed bin after drying, by v-ti magnetite
Ore deposit is finely ground to 10-45 microns and accounts for more than 80%, and it is stand-by to be transported to fast pyrogenation furnace roof portion feed bin, the main component of vanadium titano-magnetite
And content is shown in Table 1, fast pyrogenation stove uses radiant tube electrical heating, and pyrolysis reaction temperature is 900 degrees Celsius.
First by raw material coal particle from pyrolysis oven top by feed auger continuous charging, raw material coal particle is stopped in stove
Time is 4s, and raw material coal particle is pyrolyzed during descending, generates the composition point of solid semicoke and pyrolysis gas, pyrolysis gas and semicoke
2 and table 3 are not shown in Table；When fast pyrogenation gas is full of in stove, i.e., when furnace pressure reaches 0.2MPa, from vanadium titano-magnetite particle feed bin
Continuous-feeding, raw material coal particle is 4 with the addition speed ratio of vanadium titano-magnetite particle：1, vanadium titano-magnetite particle is stopped in stove
Time is 10s, to ensure that pyrolysis gas is sufficiently mixed with vanadium titano-magnetite particle concurrently gives birth to reduction reaction, the vanadium of gained after reduction
The main component of titanium sponge iron is shown in Table 4, and pyrolysis furnace bottom sets concentration equipment, and the physical property according to semicoke and vanadium titanium sponge iron is not
Hot semicoke and vanadium titanium sponge iron are collected with sorting.Whole technique productions cost 26 yuan/ton of vanadium titanium sponge iron of reduction, energy consumption reduction
0.22Gcal/t vanadium titanium sponge iron.
The main component and content (wt%) of the vanadium titano-magnetite of table 1
| Composition | TFe | FeO | |||
| Content | 54.12 | 23.09 | 51.08 | 0.65 | 15.77 |
The main component and content (vt%) of the pyrolysis gas of table 2
| CO | ||||||||
| 20.30 | 48.02 | 21.51 | 7.69 | 0.18 | 1.02 | 0.0070 | 0.040 | 0.65 |
The main component and content (wt%) of the semicoke of table 3
| Composition | C | Vad | Aad | Mad |
| Content | 62.8 | 7.55 | 28.76 | 0.89 |
The main component and content (wt%) of the vanadium titanium sponge iron of table 4
| Composition | TFe | FeO | MFe | ||
| Content | 65.05 | 7.66 | 59.09 | 0.78 | 18.95 |
Embodiment 2
Feed coal is crushed to 1.5~4mm, it is stand-by to be transported to fast pyrogenation furnace roof portion feed bin after drying, by v-ti magnetite
Ore deposit is finely ground to 10-45 microns and accounts for more than 80%, and it is stand-by to be transported to fast pyrogenation furnace roof portion feed bin, the main component of vanadium titano-magnetite
And content is shown in Table 1, fast pyrogenation stove uses radiant tube electrical heating, and pyrolysis reaction temperature is 750 degrees Celsius.
First by raw material coal particle from pyrolysis oven top by feed auger continuous charging, raw material coal particle is stopped in stove
Time is 6s, and raw material coal particle is pyrolyzed during descending, generates the composition point of solid semicoke and pyrolysis gas, pyrolysis gas and semicoke
5 and table 6 are not shown in Table；When fast pyrogenation gas is full of in stove, i.e., when furnace pressure reaches 0.9MPa, from vanadium titano-magnetite particle feed bin
Continuous-feeding, raw material coal particle is 6 with the addition speed ratio of vanadium titano-magnetite particle：1, vanadium titano-magnetite particle is stopped in stove
Time is 15s, to ensure that pyrolysis gas is sufficiently mixed with vanadium titano-magnetite particle concurrently gives birth to reduction reaction, the vanadium of gained after reduction
The main component of titanium sponge iron is shown in Table 7, and pyrolysis furnace bottom sets concentration equipment, and the physical property according to semicoke and vanadium titanium sponge iron is not
Hot semicoke and vanadium titanium sponge iron are collected with sorting.Whole technique productions cost 28 yuan/ton of vanadium titanium sponge iron of reduction, energy consumption reduction
0.25Gcal/t vanadium titanium sponge iron.
The main component and content (vt%) of the pyrolysis gas of table 5
| CO | ||||||||
| 22.69 | 46.72 | 21.51 | 6.69 | 0.18 | 1.02 | 0.019 | 0.36 | 0.77 |
The main component and content (wt%) of the semicoke of table 6
| Composition | C | Vad | Aad | Mad |
| Content | 64.3 | 8.55 | 26.11 | 0.88 |
The main component and content (wt%) of the vanadium titanium sponge iron of table 7
| Composition | TFe | FeO | MFe | ||
| Content | 65.54 | 4.34 | 62.17 | 0.79 | 19.09 |
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means to combine specific features, structure, material or spy that the embodiment or example are described
Point is contained at least one embodiment of the invention or example.In this manual, to the schematic representation of above-mentioned term not
Identical embodiment or example must be directed to.And, the specific features of description, structure, material or feature can be with office
Combined in an appropriate manner in one or more embodiments or example.Additionally, in the case of not conflicting, the skill of this area
Art personnel can be tied the feature of the different embodiments or example described in this specification and different embodiments or example
Close and combine.
Although embodiments of the invention have been shown and described above, it is to be understood that above-described embodiment is example
Property, it is impossible to limitation of the present invention is interpreted as, one of ordinary skill in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, changes, replacing and modification.
Claims (9)
1. it is a kind of process vanadium titano-magnetite system, it is characterised in that including：
Breaker, the breaker has feed coal entrance and feed coal particle outlet；
Fine grinding device, the fine grinding device has vanadium titano-magnetite entrance and vanadium titano-magnetite particle outlet；
There is rapid pyrolysis apparatus, the rapid pyrolysis apparatus feed coal particle entrance, vanadium titano-magnetite particle entrance, tail gas to go out
Mouthful and contain semicoke and the outlet of vanadium titanium sponge iron mixed material, the feed coal particle entrance and the feed coal particle outlet
It is connected, the vanadium titano-magnetite particle entrance is connected with the vanadium titano-magnetite particle outlet；
There is concentration equipment, the concentration equipment mixed material entrance, the outlet of vanadium titanium sponge iron and semicoke to export, the mixture
Material entrance is connected with described containing semicoke and the outlet of vanadium titanium sponge iron mixed material.
2. system according to claim 1, it is characterised in that the rapid pyrolysis apparatus are pyrolysis oven, preferably radiant tube
Electricity or gas heated type pyrolysis oven.
3. the method that the system described in a kind of use claim 1 or 2 processes vanadium titano-magnetite, it is characterised in that including：
(1) supplying to the breaker feed coal carries out break process, to obtain raw material coal particle；
(2) supplying to the fine grinding device vanadium titano-magnetite carries out fine grinding treatment, to obtain vanadium titano-magnetite particle；
(3) supplying the raw material coal particle carries out pyrolysis processing into the rapid pyrolysis apparatus, so as to obtain pyrolysis gas and
Semicoke, then the vanadium titano-magnetite particle is supplied reduced with the pyrolysis gases contact into the rapid pyrolysis apparatus
Reaction, obtains tail gas and vanadium titanium sponge iron；
(4) supply the mixed material containing semicoke and vanadium titanium sponge iron that step (3) is obtained is carried out into the concentration equipment
Magnetic separation is separated, to obtain semicoke and vanadium titanium sponge iron.
4. method according to claim 3, it is characterised in that in step (1), the particle diameter of the raw material coal particle is
0.5-4mm。
5. the method according to claim 3 or 4, it is characterised in that in step (1), the feed coal is selected from high-order
At least one of coal, scala media coal and low-order coal.
6. method according to claim 3, it is characterised in that in step (2), the particle diameter of the vanadium titano-magnetite particle
It is 10-150 microns of accounting more than 80%.
7. method according to claim 3, it is characterised in that in step (3), the temperature of the pyrolysis processing is 700-
900 degrees Celsius.
8. the method according to claim 3 or 7, it is characterised in that in step (3), the raw material coal particle with it is described
The addition speed ratio of vanadium titano-magnetite particle is (3~6)：1.
9. method according to claim 3, it is characterised in that in step (3), when the pyrolysis gas cause it is described quick
When pressure is 0.15~1Mpa in pyrolysis installation, then the vanadium titano-magnetite particle is supplied to the rapid pyrolysis apparatus.
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| CN108636522A (en) * | 2018-04-12 | 2018-10-12 | 会理县财通铁钛有限责任公司 | A kind of processing vanadium titano-magnetite device |
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