CN107227385A - A kind of quick reduction reaction system and method for the circulating miberal powder that can carry hydrogen - Google Patents
A kind of quick reduction reaction system and method for the circulating miberal powder that can carry hydrogen Download PDFInfo
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- CN107227385A CN107227385A CN201710613578.8A CN201710613578A CN107227385A CN 107227385 A CN107227385 A CN 107227385A CN 201710613578 A CN201710613578 A CN 201710613578A CN 107227385 A CN107227385 A CN 107227385A
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- miberal powder
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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
- C21B13/0073—Selection or treatment of the reducing gases
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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
- C21B13/02—Making spongy iron or liquid steel, by direct processes in shaft furnaces
Abstract
The invention belongs to metallurgical technology field, and in particular to a kind of quick reduction reaction system and method for the circulating miberal powder that can carry hydrogen, wherein, the circulating quick reduction reaction system of miberal powder includes：Feed system, reactor, also heating system, Primordial Qi system and discharge system, the reactor are connected with feed system, also Primordial Qi system and discharge system respectively, and the also Primordial Qi system includes：Also Primordial Qi gas handling system includes with exhaust treatment system, the also Primordial Qi gas handling system is reduced：Gas storage tank is reduced, Primordial Qi intake valve is gone back, carries hydrogen production device, heater, blower fan and air distribution plate etc., the system can directly use miberal powder as raw material, agglomeration process is saved, and the system operatio is easy, temperature control is accurate and process is easily-controllable.
Description
Technical field
The invention belongs to metallurgical technology field, and in particular to a kind of quick reduction reaction system of the circulating miberal powder that can carry hydrogen
System and method.
Background technology
Current direct reduction processes of Iron ores is the cutting edge technology of development of iron ＆ steel industry, is that development of iron ＆ steel industry breaks away from coking coal money
The yoke in source, reduction energy consumption, reduction CO2Discharge, the important development side for improving steel products structure, improving steel products quality
To.DRI is the substitute of high-quality steel scrap, is the source of iron raw material that can not be short for producing high-quality clean steel, is converter
The high-quality cooling agent of steel-making.Commercial production levels are reached now or are still broadly divided into two in the direct reduction process for continuing to test
Class：Direct-reduction process using gaseous reducing agent and the direct-reduction process using solid reductant.Wherein, using gaseous reducing agent
Direct-reduction process divide by process equipment and can be divided into three classes, including shaft furnace process, retort process making sponge iron and fluidized bed process.
Shaft furnace process refers to furnace charge and coal gas reverse movement in stove, and the furnace charge of decline is progressively by heated by gas and the side of reduction
Method.The method, using Midrex methods as representative, is most fast, the most widely used direct reduction iron making of current development.It is used as the oxygen of raw material
Pellet ore deposit is added after shaft furnace from furnace roof, sequentially passes through preheating, reduction and cooling three phases.Sponge iron obtained by reduction, it is cold
But to discharging out of the furnace after 50 DEG C, to prevent reoxidizing.Reducing gas is manufactured with a part of coal gas of natural gas and shaft furnace in itself, is first added
Heat is passed through to 760~900 DEG C in reduction shaft furnace pars infrasegmentalis.Stock gas is respectively used to coal gas regeneration, conversion stove heat after reclaiming
With shaft furnace cooling.The heat and mass efficiency high of this method, product energy consumption per ton can be low up to 2.56 × 106Kilocalorie, good product quality, gold
Belong to rate up to 92%.The HyL methods of Mexico are unique industrialization retort processes making sponge iron.Furnace charge is fixed in retort, is passed through heat
Reducing gas is preheated, reduced and cooled down successively, is finally periodically stopped the supple of gas or steam, outside furnace charge drain tank.In order to overcome fixed bed also
Rough gas utilizes bad shortcoming, and HyL methods employ 4 retort serial operations, and reducing gas is manufactured with natural gas, is first changing
Insufficient conversion in hot type reburner.Be dehydrated after the reaction of each retort, secondary conversion and temperature raising, coal gas exists
Reduced at a high temperature of 1100 DEG C.In the case where stopping ventilation, HyL methods force discharge using discharge bar, therefore are not afraid of charging binding,
Operation temperature is higher, though being interruption operation, productivity ratio is not low.Have the disadvantage that coal gas is utilized poor, heat consumption is big, product quality is uneven.
Fluidized bed process is the method that gas reduction Iron Ore Powder is used in fluid bed.In fluidized bed process reduction, coal gas, which is removed, is used as reducing agent
And outside heat carrier, also serve as the fluidizing agent of bulk cargo layer.Air flow press moldingization that the smitham bed of material is through and be heated successively,
Reduction and cooling.Briquetting after product cooling is reduced to preserve.Fluidized reduction has the advantages that directly to use miberal powder to save agglomeration, and
Because ore grain size is small and can Accelerating reduction.Have the disadvantage that particulate miberal powder is very easily bonded, typically in 600~700 DEG C of not high temperature
Lower operation, not only reduction rate is little, and easily facilitates CO analysis carbon to react；Carbon precipitating is excessive, then hinders normal operating.
The content of the invention
The present invention is in view of the shortcomings of the prior art, it is proposed that a kind of quick reduction reaction system of the circulating miberal powder that can carry hydrogen
System and method, the system can directly use miberal powder as raw material, save agglomeration process, and the system operatio is easy, temperature control essence
Really and process is easily-controllable.
In order to solve the above technical problems, the technical scheme that the present invention takes is：
The present invention proposes a kind of quick reduction reaction system of the circulating miberal powder that can carry hydrogen, including：Feed system, reaction
Device, also heating system, Primordial Qi system and discharge system, wherein, the inner chamber of the reactor be divided into from top to bottom feed zone,
Reduction section and taper cooling section, the reactor are connected with feed system, also Primordial Qi system and discharge system respectively, the reduction
Gas system includes：Also Primordial Qi gas handling system includes with exhaust treatment system, the also Primordial Qi gas handling system is reduced：Also Primordial Qi is stored up
Tank, also Primordial Qi intake valve, carry hydrogen production device, heater, blower fan and air distribution plate, wherein, it is described reduction gas storage tank through the reduction
Gas intake valve is connected with the entrance for carrying hydrogen production device, for being passed through also Primordial Qi in hydrogen production device to described carry；It is described to carry hydrogen production device
First outlet be connected with the entrance of the heater, the second outlet for carrying hydrogen production device is connected with the blower fan, is used for
It also Primordial Qi will carry out carrying hydrogen, and produce richness CO gases and hydrogen；The blower fan is connected with air distribution plate, and the air distribution plate is located at the cone
Shape cooling section, for the rich CO gases to be quickly passed through into the taper cooling section, with reduzate carry out reverse heat exchange and
Carburization reaction；The heater is connected with the multiple also Primordial Qi secondary air inlets set in the sidewall of reactor, for inciting somebody to action
From it is described carry hydrogen production device be passed through the hydrogen of the heater and through it is described reduction exhaust treatment system processing after obtain it is not anti-
After the also Primordial Qi Hybrid Heating answered, the reduction section of the reactor is passed through；The reduction exhaust treatment system respectively with it is described anti-
Answer the reduction offgas outlet of device to be connected with the heater, form also Primordial Qi circulation loop, for by reduction tail gas
After reason, it is passed through again in the reactor.
Further, the reactor includes：One or more layers goes back Primordial Qi secondary air inlet, and the multilayer also Primordial Qi is secondary
Air inlet is distributed on the side wall of the reactor and positioned at the bottom of the reduction section along the height for reactor direction
And it is circumferentially disposed along reactor；The also Primordial Qi secondary air inlet of each layer is provided with the different nozzle of multiple length, the nozzle
Along the side wall circle alternate ring cloth of the reactor, for controlling also distribution of the Primordial Qi in the reactor inner chamber radially.
Further, the heating system is located in the reduction section, including：Central gas conduit and along the reactor
The multilayer heat accumulation type radiant tube of short transverse arrangement, every layer of heat accumulation type radiant tube is located in same level provided with many
U-shaped heat accumulation type radiant tube, the U-shaped heat accumulation type radiant tube is along the central gas conduit circumferential ring cloth and and central gas conduit
It is connected, for accurately controlling the temperature field in reactor and thermograde, heat accumulation type radiant tube described in two layers is with relative up and down
The mode of the anglec of rotation is set so that the U-shaped heat accumulation type radiant tube of each layer be not overlapping, and the miberal powder caused to fall and break is evenly distributed.
Further, the relative rotation angle is 0 ° -180 °/n, and wherein n is the number of every layer of heat accumulation type radiant tube
Amount；The side wall of the reduction section is provided with the air intake and fuel gas inlet being connected with the heat accumulation type radiant tube, the air
Entrance and fuel gas inlet are respectively positioned on the bottom of the heat accumulation type radiant tube.
Further, the feed system includes：Raw material cabin, bucket carry and feed auger, wherein, it is described bucket carry respectively with original
Feed bin is connected with the feed auger positioned at the reactor top, the charging aperture for carrying material, the feed auger and reactor
It is connected.
Further, the also Primordial Qi gas handling system also includes：Nitrogen storage tank and nitrogen intake valve, wherein, the nitrogen
Storage tank is connected through nitrogen intake valve with the blower fan, for carrying out nitrogen to whole system before also Primordial Qi enters the reactor
Air-blowing is swept, to ensure that whole system is in nonoxidizing atmosphere；The reduction exhaust treatment system includes：Wash cooling device,
Compression set and decarbonization device, wherein, described wash cooling device one end with it is described reduction offgas outlet be connected, its other end according to
Secondary to be connected with compression set and decarbonization device, the decarbonization device is connected with the entrance of the heater, for that will go back protocercal tail
Gas is handled, and is obtained unreacted also Primordial Qi and is passed through again in the heater.
Further, the discharge system includes：Hot pressing block assembly, cooling device and product feed bin, wherein, the hot pressing
Block assembly one end is connected with the reduzate outlet of the reactor, is easy to for powdery reduzate to be processed as into block product
Transport, its other end is connected with cooling device and product feed bin successively.
Further, the reactor also includes：Offgas outlet, charging aperture, reduzate outlet and exhanst gas outlet are reduced,
It is described reduction offgas outlet be located at the reactor side wall on and the reduction section top, charging aperture be located at the reactor
Top, reduzate outlet is located at the upper portion side wall of reactor positioned at the bottom of the reactor, the exhanst gas outlet
It is upper to be connected with the central gas conduit.
In another aspect of this invention, it is proposed that a kind of to carry out ore deposit using the quick reduction reaction system of foregoing miberal powder
The method of the quick reduction reaction of powder, comprises the following steps：
A. the nitrogen intake valve and blower fan are opened, nitrogen rapidly enters progress air displacement in reactor, and then to whole system
System carries out nitrogen purging, whole system is in nonoxidizing atmosphere；
B. after nitrogen purging is finished, the temperature of heat accumulation type radiant tube in the reactor is set, the storage is passed through by adjustment
The gas flow and air mass flow of hot type radiant tube, realize accurate temperature control；
C. after reactor inner chamber temperature reaches preset value and stabilization, nitrogen air intake valve is closed, also Primordial Qi air inlet is opened
Valve, reducing gas enters reactor reduction section, is carried again by bucket afterwards the miberal powder in raw material cabin being promoted to the feed auger
In again through the charging aperture enter reactor in：When opening the also Primordial Qi intake valve, reduction is passed through in hydrogen production device to described carry
Gas carries out carrying hydrogen, produces richness CO gases and hydrogen, the rich CO gases pass sequentially through blower fan and air distribution plate enters taper cooling section,
Carry out reverse heat exchange and carburization reaction with reduzate, the hydrogen be passed through in the heater with from the reduction tail gas
The unreacted also Primordial Qi Hybrid Heating that processing system is obtained after handling is hot also Primordial Qi, and hot also Primordial Qi is gone back through the multiple
Primordial Qi secondary air inlet is passed through the reduction section and carries out reduction reaction with miberal powder；
D. the reduzate for reacting generation is discharged from the bottom of the reactor, and forms block production through the hot pressing block assembly
Thing, then product feed bin is sent into after being cooled down through cooling device；
E. the reduction tail gas after reduction reaction is participated in discharge from the reduction offgas outlet, and scrubbed cooling device, pressure successively
Unreacted also Primordial Qi, which is obtained, after compression apparatus progress cooling and dedusting corresponding with decarbonization device, compression, decarburization is passed through the heating again
In device.
Further, in the step c, the stable preset value of reactor inner chamber temperature is 900-1200 DEG C；Institute
It is 800-1000 DEG C to state the hot reduction temperature degree heated in heater.
The present invention at least includes following beneficial effect：
1）The cross section of reactor of the present invention is circle, compared to square reactor, is uniformly distributed in miberal powder, has in terms of device pressurization
Clear superiority, is made up of the multiple U-shaped radiant tubes for being connected to central gas conduit using multilayer radiant tube, every layer of radiant tube, adopted
Coordinate circular cross section reactor with the radiant tube of this kind of form, reactor temperature distribution can be made more uniform, it is to avoid side
Situation of the shape cross section reactor in 4 edge temperature distributing disproportionations；
2）The system can directly use miberal powder as raw material, save agglomeration process, and the system operatio is easy, passes through radiant tube
Arrangement temperature control it is accurate and process is easily-controllable, while can be controlled also by the set-up mode of multilayer also Primordial Qi secondary air inlet
Distribution of the Primordial Qi in the reactor inner chamber radially；
3）Also Primordial Qi gas handling system of the present invention is divided into the cooling section and reduction section that two strands of reduction gas respectively enter reactor, its
In one also first passed through before Primordial Qi enters cooling section and propose hydrogen processing, obtain hydrogen and rich CO gas, obtained richness one
Carbon oxide gas are carried out after reverse heat exchange and carburization reaction upwards by rapidly entering the cooling section of reactor with reduzate
Into reduction section and carry out reduction reaction；Carry after the also Primordial Qi mixing of the obtained hydrogen after hydrogen and another stock, into heater
It is 800-1000 DEG C of hot also Primordial Qi to become temperature, the reduction section of quick reduction reactor is directly entered, supplemented with reactor
Inside reduction tolerance, while also make it that the distribution of inside reactor gas is more uniform.In addition, into the hot reduction of reactor
Gas, directly can continue occur reduction reaction with not yet reacting complete miberal powder, be conducive to improving the metallization in reduzate
Rate, strengthens reduction effect；
4）The present invention obtains not anti-using reduction circulation of tail gas Application way, reduction tail gas after cooling and dedusting, compression, decarburization
The also Primordial Qi answered, is then heated with carrying after the hydrogen obtained after hydrogen is mixed, subsequently into being recycled in reactor,
High financial profit, it is cost-effective.
Brief description of the drawings
Fig. 1 is the structural representation of the circulating quick reduction reaction system of miberal powder of the invention.
Fig. 2 is that heat accumulation type radiant tube of the present invention arranges schematic diagram.
Fig. 3 goes back the side view of Primordial Qi secondary air inlet for the present invention.
Fig. 4 goes back the top view of Primordial Qi secondary air inlet for the present invention.
Wherein, raw material cabin 1, bucket propose 2, feed auger 3, reactor 4, also Primordial Qi secondary air inlet 401, nozzle 402, accumulation of heat
Formula radiant tube 5, central gas conduit 501, air distribution plate 6, also blower fan 7, Primordial Qi intake valve 8, nitrogen intake valve 9, reduction gas storage tank
10th, nitrogen storage tank 11, wash cooling device 12, compression set 13, decarbonization device 14, hot pressing block assembly 15, cooling device 16, production
Product feed bin 17, fuel gas inlet 18, air intake 19, exhanst gas outlet 20, charging aperture 21, reduction offgas outlet 22, heater 23,
Propose hydrogen production device 24, reduzate outlet 25.
Embodiment
In order that those skilled in the art more fully understand technical scheme, with reference to specific embodiment to this
Invention is described in further detail.The embodiments described below is exemplary, is only used for explaining the present invention, without being understood that
For limitation of the present invention.Unreceipted particular technique or condition in embodiment, according to the skill described by document in the art
Art or condition are carried out according to product description.
The present invention proposes a kind of quick reduction reaction system of the circulating miberal powder that can carry hydrogen, including：It is feed system, anti-
Device 4, also heating system, Primordial Qi system and discharge system are answered, wherein, the inner chamber of the reactor is divided into charging from top to bottom
Section, reduction section and taper cooling section, taper is set to by cooling section, is easy to granular material to slide to reduzate outlet 25, is kept away
Exempt from product local accumulation, result in blockage；The reactor is connected with feed system, also Primordial Qi system and discharge system respectively.
Embodiments in accordance with the present invention, also Primordial Qi system of the present invention includes：Also Primordial Qi gas handling system and reduction tail gas
Processing system, Fig. 1 is the structural representation of the circulating quick reduction reaction system of miberal powder of the invention, shown in reference picture 1, described to go back
Primordial Qi gas handling system includes：Gas storage tank 10 is reduced, Primordial Qi intake valve 8 is gone back, carries hydrogen production device 24, heater 23, blower fan 7, cloth wind
Plate 6, nitrogen storage tank 11 and nitrogen intake valve 9, wherein, the nitrogen storage tank is connected through nitrogen intake valve with the blower fan, also
Primordial Qi needs to carry out nitrogen purging to whole system before entering reactor, to ensure that whole system is in nonoxidizing atmosphere,
When nitrogen is purged, also Primordial Qi intake valve 8 is closed, nitrogen intake valve is opened, then opens blower fan, enter the nitrogen in nitrogen storage tank
Enter in reactor；Nitrogen purging is finished, and closes nitrogen intake valve, is opened also Primordial Qi intake valve, is then opened blower fan, reduced
Reaction.
Embodiments in accordance with the present invention, shown in reference picture 1, the reduction gas storage tank through the also Primordial Qi intake valve with it is described
Carry hydrogen production device 24 entrance be connected, for it is described carry be passed through in hydrogen production device also Primordial Qi carry out carry hydrogen processing；It is described to carry hydrogen production device
First outlet be connected with the entrance of the heater, the second outlet for carrying hydrogen production device is connected with the blower fan, will also
Primordial Qi carries out carrying hydrogen, produces richness CO gases and hydrogen；The blower fan is connected with air distribution plate, and it is cold that the air distribution plate is located at the taper
But section, for the rich CO gases to be quickly passed through into the taper cooling section, reverse heat exchange is carried out with reduzate（The two is transported
It is dynamic in opposite direction）And carburization reaction, systematic heat utilization rate is effectively improved, while reducing the oxidized risk of reduzate；It is described
Heater is connected with the multiple also Primordial Qi secondary air inlets 401 set in the sidewall of reactor, for that will carry hydrogen from described
Device is passed through the hydrogen of the heater and the unreacted also Primordial Qi obtained after the reduction exhaust treatment system processing
It is 800 ~ 1000 DEG C of hot also Primordial Qi to become temperature after Hybrid Heating, is passed directly into the reduction section of the reactor so that anti-
Answer the distribution of device internal gas more uniform, while being also more beneficial for reduction reaction supplemented with the reduction tolerance moved upwards.Separately
Outside, into the hot also Primordial Qi of reactor, it directly can continue occur reduction reaction with not yet reacting complete miberal powder, be conducive to
The degree of metalization in reduzate is improved, strengthens reduction effect.
Embodiments in accordance with the present invention, shown in reference picture 1, the reduction exhaust treatment system includes：Wash cooling device
12nd, compression set 13 and decarbonization device 14, wherein, described wash cooling device one end and the reduction offgas outlet of the reactor
It is connected, its other end is connected with compression set and decarbonization device successively, the entrance phase of the decarbonization device and the heater
Even, formation also Primordial Qi circulation loop, for reduction tail gas to be handled, obtains unreacted also Primordial Qi and is passed through described add again
In thermal, Resource Recycling Utilization is cost-effective, with good economic benefit.
Embodiments in accordance with the present invention, Fig. 2 is that heat accumulation type radiant tube of the present invention arranges schematic diagram, described shown in reference picture 2
Heating system is located in the reduction section, including：Central gas conduit 501 and the multilayer arranged along the height for reactor direction
Heat accumulation type radiant tube, every layer of heat accumulation type radiant tube is provided with many U-shaped heat accumulation type radiant tubes being located in same level, institute
U-shaped heat accumulation type radiant tube 5 is stated along the central gas conduit circumferential ring cloth and is connected with central gas conduit.
According to some embodiments of the present invention, the side wall of the reduction section is provided with what is be connected with the heat accumulation type radiant tube
Air intake 19 and fuel gas inlet 18, the air intake and fuel gas inlet are respectively positioned on the bottom of the heat accumulation type radiant tube；This
The number of stories m for inventing the heat accumulation type radiant tube is preferably m >=5, and the heat accumulation type radiant tube can be gas heat-accumulated type radiant tube,
Combustion reaction occurs for the combustion gas and air entered through the fuel gas inlet and air intake in heat accumulation type radiant tube, thus produces
Heat miberal powder and reducibility gas in reactor are mainly transferred heat in the way of radiation, bring it about reduction reaction and obtain
Reduzate is obtained, the flue gas produced after burning is discharged from exhanst gas outlet 20.Fuel gas flow system in heat accumulation type radiant tube with it is anti-
Answer the reduction flow of air system in device isolated from one another, do not interfere with the reduction process in reactor.Heat accumulating type is passed through by regulation
The gas flow of radiant tube can accurately control the temperature field in reactor, it is possible thereby to control reactor temperature number with
And thermograde, realize the accurate temperature controlling to reduction process in reactor.Shown in reference picture 2, heat accumulating type radiation of the present invention
Pipe takes unique set-up mode, heat accumulation type radiant tube described in two layers will be made up and down with 0 ° -180 °/n relative rotation angle setting
Each U-shaped heat accumulation type radiant tube of layer be not overlapping, wherein n is the quantity of described every layer U-shaped heat accumulation type radiant tube, the miberal powder caused to fall and break
It is evenly distributed.
According to some embodiments of the present invention, the cross section of reactor of the present invention is preferably circular, anti-compared to square
Device is answered, is uniformly distributed in miberal powder, has a clear superiority in terms of device pressurization, while using multilayer radiant tube, every layer of radiant tube by even
Multiple U-shaped radiant tube compositions of central gas conduit are connected to, circular cross section reactor is coordinated using the radiant tube of this kind of form,
Reactor temperature distribution can be made more uniform, it is to avoid square cross section reactor is in 4 edge temperature distributing disproportionations
Situation.
Embodiments in accordance with the present invention, Fig. 3 is the side view of the present invention also Primordial Qi secondary air inlet, and Fig. 4 goes back for the present invention
The top view of Primordial Qi secondary air inlet, shown in reference picture 1, Fig. 3 and Fig. 4, the reactor includes：Reduce offgas outlet 22, enter
Material mouth 21, reduzate export 25, exhanst gas outlet 20 and one or more layers goes back Primordial Qi secondary air inlet 401, wherein, the reduction
Offgas outlet be located at the reactor side wall on and the reduction section top, charging aperture be located at the reactor top,
Reduzate outlet positioned at the bottom of the reactor, the exhanst gas outlet be located in the upper portion side wall of reactor with it is described
Central gas conduit is connected；The multilayer also Primordial Qi secondary air inlet is distributed in described along the height for reactor direction
Set on the side wall of reactor and positioned at the bottom of the reduction section and along reactor circumferencial direction, the also Primordial Qi two of each layer
Secondary air inlet is provided with the different nozzle of multiple length, for better controling over also Primordial Qi in the reactor inner chamber radially
Distribution, side wall circle alternate ring cloth of the nozzle along the reactor, for controlling also Primordial Qi in the reactor inner chamber
Distribution radially.According to some embodiments of the present invention, the number n of nozzle of the present invention is preferably n >=2.
Embodiments in accordance with the present invention, shown in reference picture 1, the feed system includes：Raw material cabin 1, bucket carry 2 and charging spiral shell
Rotation 3, wherein, the bucket is carried and is connected respectively with raw material cabin and positioned at the feed auger of the reactor top, for from raw material cabin
To reactor feeding, the feed auger is connected with the charging aperture of reactor；The discharge system includes：Hot pressing block assembly 15,
Cooling device 16 and product feed bin 17, wherein, described hot pressing block assembly one end is connected with the reduzate outlet of the reactor,
Be readily transported for powdery reduzate to be processed as into block product, its other end successively with cooling device and product feed bin phase
Even.Miberal powder in the raw material cabin is promoted to the feed auger positioned at reactor head by bucket, under its effect, miberal powder by
Charging aperture is rapidly entered in reactor, after quick reduction process in the reactor, the hot discharging of reduzate of generation,
And block product is become by powdery under hot pressing block assembly, it is possible thereby to reduce the contact area of reduzate and air, reduce
The oxidation of reduzate.In addition, block product is readily transported, block product is delivered to the product feed bin after apparatus for supercooling and entered
Row is preserved.
In another aspect of this invention, it is proposed that a kind of to carry out ore deposit using the quick reduction reaction system of foregoing miberal powder
The method of the quick reduction reaction of powder, embodiments in accordance with the present invention comprise the following steps：
A. present system needs to be checked and air-tight test before the test, confirms that whole system possesses normal production bar
Part, and ensure the sealing of whole pipeline, concrete operations are as follows：The nitrogen intake valve 9 and blower fan are opened, nitrogen is rapidly entered
Air displacement is carried out in reactor 4, and then nitrogen purging is carried out to whole system, whole system is in nonoxidizing atmosphere；
B. after nitrogen purging is finished, the temperature of heat accumulation type radiant tube in the reactor is set, the heat accumulating type is passed through by adjustment
The gas flow and air mass flow of radiant tube, realize accurate temperature control.
C. after reactor inner chamber temperature reaches 900-1200 DEG C of preset value and stabilization, logical also Primordial Qi is first carried out, then
Carry out feed operation.
Embodiments in accordance with the present invention, shown in reference picture 1, operation is specially：Nitrogen air intake valve is closed, also Primordial Qi is opened
Intake valve, reducing gas enters reactor reduction section, is carried again by bucket afterwards the miberal powder in raw material cabin being promoted to the charging
Enter again through the charging aperture in reactor in spiral：When opening the also Primordial Qi intake valve, it is passed through to described carry in hydrogen production device
Also Primordial Qi carries out carrying hydrogen, produces richness CO gases and hydrogen, it is cold into taper that the rich CO gases pass sequentially through blower fan and air distribution plate
But section, reverse heat exchange and carburization reaction are carried out with reduzate, and the hydrogen is passed through in the heater with being gone back from described
The unreacted also Primordial Qi Hybrid Heating obtained after the processing of protocercal tail gas processing system is the hot reduction that temperature is 800-1000 DEG C
Gas, hot also Primordial Qi is passed through the reduction section and miberal powder progress reduction reaction through the multiple also Primordial Qi secondary air inlet so that
The distribution of inside reactor gas is more uniform, while being also more beneficial for reduction reaction supplemented with the reduction tolerance moved upwards.Separately
Outside, into the hot also Primordial Qi of reactor, it directly can continue occur reduction reaction with not yet reacting complete miberal powder, be conducive to
The degree of metalization in reduzate is improved, strengthens reduction effect.
D. the reduzate for reacting generation is discharged from the bottom of the reactor, and forms bulk through the hot pressing block assembly
Product, then product feed bin is sent into after being cooled down through cooling device.
E. the reduction tail gas after reduction reaction is participated in from the reduction offgas outlet discharge, and scrubbed cooling dress successively
Put, compression set it is corresponding with decarbonization device carry out cooling and dedusting, compression, obtain after decarburization unreacted also Primordial Qi be passed through again it is described
In heater, abundant Resource Recycling Utilization, with it is good in economic efficiency the characteristics of.
According to some embodiments of the present invention, the specific species of miberal powder of the present invention is unrestricted, can be magnesium, iron ore
Deng of the invention that the original system progress quick reduction reaction of miberal powder is quickly gone back to circulating miberal powder of the present invention with fine iron breeze
Method is further illustrated.
Embodiment 1：The method that the circulating fine iron breeze of the present embodiment is quickly reduced, comprises the following steps：
1）Whole system is purged using nitrogen, whole system is in nonoxidizing atmosphere；
2）Carry out being heated to after 950 DEG C and stabilization using heat accumulation type radiant tube, first carry out being passed through also Primordial Qi, then fed；
3）Fine iron breeze is added from reactor head, successively through feed zone, reduction section and taper cooling section；Wherein, the iron
Concentrate Iron grade is 65%, and the ratio that mineral powder granular particle diameter is less than 0.074mm is no less than 80%；
4）Open the also Primordial Qi intake valve to be passed through also Primordial Qi in hydrogen production device to described carry and carry out carrying hydrogen, producing volume fraction is
90% rich CO gases and volume fraction is 5% hydrogen, and it is cold into taper that the rich CO gases pass sequentially through blower fan and air distribution plate
But section, reverse heat exchange and carburization reaction are carried out with reduzate；The hydrogen is passed through in the heater to be mixed with also Primordial Qi
The hot also Primordial Qi for being heated to be that temperature is 950 DEG C is closed, hot also Primordial Qi is logical through the multilayer also Primordial Qi secondary air inlet and nozzle
Enter the reduction section and carry out reduction reaction with miberal powder, wherein, CO volume fractions are 35%, H in the hot also Primordial Qi2Volume integral
Number is 55%；
5）The unreacted also Primordial Qi that the reduction tail gas produced is cooled down by dedusting, pressurizeed, obtaining after decarburization, feeding are reacted and Primordial Qi
Mixed, be passed through again in the reactor with brand-new also Primordial Qi in storage tank；
6）The reacted device bottom discharge of the metallization powder produced is reacted, the degree of metalization of the metallization powder iron is 93%.
Embodiment 2：The method that the circulating fine iron breeze of the present embodiment is quickly reduced, comprises the following steps：
1）Whole system is purged using nitrogen, whole system is in nonoxidizing atmosphere；
2）It is heated to using heat accumulation type radiant tube：Radiant tube is set to 920 DEG C, bottom three in the altitude range of top 1/3rd
Radiant tube temperature is set to after 950 DEG C and stabilization in/bis- altitude ranges, first carries out being passed through also Primordial Qi, then fed；
3）Fine iron breeze is added from reactor head, successively through feed zone, reduction section and taper cooling section；Wherein, the iron
Concentrate Iron grade is 65%, and the ratio that mineral powder granular particle diameter is less than 1mm is no less than 80%；
4）Open the also Primordial Qi intake valve to be passed through also Primordial Qi in hydrogen production device to described carry and carry out carrying hydrogen, producing volume fraction is
90% rich CO gases and volume fraction is 5% hydrogen, and it is cold into taper that the rich CO gases pass sequentially through blower fan and air distribution plate
But section, reverse heat exchange and carburization reaction are carried out with reduzate；The hydrogen is passed through in the heater to be mixed with also Primordial Qi
The hot also Primordial Qi for being heated to be that temperature is 950 DEG C is closed, hot also Primordial Qi is logical through the multilayer also Primordial Qi secondary air inlet and nozzle
Enter the reduction section and carry out reduction reaction with miberal powder, wherein, CO volume fractions are 35%, H in the hot also Primordial Qi2Volume integral
Number is 55%；
5）The unreacted also Primordial Qi that the reduction tail gas produced is cooled down by dedusting, pressurizeed, obtaining after decarburization, feeding are reacted and Primordial Qi
Mixed, be passed through again in the reactor with brand-new also Primordial Qi in storage tank；
6）The reacted device bottom discharge of the metallization powder produced is reacted, the degree of metalization of the metallization powder iron is 91%.
Inventor has found, according to the circulating quick reduction reaction system and method for miberal powder of the present invention, first this hair
The cross section of bright reactor is circle, compared to square reactor, is uniformly distributed in miberal powder, has a clear superiority in terms of device pressurization,
It is made up of using multilayer radiant tube, every layer of radiant tube the multiple U-shaped radiant tubes for being connected to central gas conduit, using this kind of form
Radiant tube coordinate circular cross section reactor, reactor temperature distribution can be made more uniform, it is to avoid square cross section is anti-
Device is answered in the situation of 4 edge temperature distributing disproportionations；And the system can directly use miberal powder as raw material, save agglomeration
Process, and the system operatio is easy, it is accurate and process is easily-controllable by the arrangement temperature control of radiant tube, while being reduced by multilayer
The set-up mode of gas secondary air inlet can control also distribution of the Primordial Qi in the reactor inner chamber radially；It is simultaneously of the invention
The also Primordial Qi gas handling system is divided into the cooling section and reduction section that two strands of reduction gas respectively enter reactor, and wherein one goes back Primordial Qi
First passed through before into cooling section and propose hydrogen processing, obtain hydrogen and rich CO gas, obtained rich CO gas leads to
The cooling section for rapidly entering reactor is crossed, reduction section is upwardly into simultaneously after carrying out reverse heat exchange and carburization reaction with reduzate
Carry out reduction reaction；Carry after the also Primordial Qi mixing of the obtained hydrogen after hydrogen and another stock, becoming temperature into heater is
800-1000 DEG C of hot also Primordial Qi, is directly entered the reduction section of quick reduction reactor, supplemented with inside reactor also Primordial Qi
Amount, while also make it that the distribution of inside reactor gas is more uniform.In addition, into the hot also Primordial Qi of reactor, can be direct
Continue occur reduction reaction with not yet reacting complete miberal powder, be conducive to improving the degree of metalization in reduzate, enhancing reduction
Effect；In addition, the present invention is using reduction circulation of tail gas Application way, reduction tail gas is obtained after cooling and dedusting, compression, decarburization
Unreacted also Primordial Qi, is then heated with carrying after the hydrogen obtained after hydrogen is mixed, is circulated subsequently into reactor
Utilize, high financial profit is cost-effective.
In the present invention, unless otherwise clearly defined and limited, the term such as term " connected ", " connection " should do broad sense reason
Solution, for example, it may be fixedly connected or be detachably connected, or integrally；Can be mechanical connection or electricity
Connection；Can be joined directly together, can also be indirectly connected to by intermediary, can be two element internals connection or two
The interaction relationship of element.For the ordinary skill in the art, above-mentioned term can be understood as the case may be
Concrete meaning in the present invention.
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 the spy that the embodiment or example are described
Point is contained at least one embodiment of the present invention or example.In this manual, to the schematic representation of above-mentioned term not
Identical embodiment or example must be directed to.Moreover, specific features, structure, material or the feature of description can be any
Combined in an appropriate manner in individual or multiple embodiments or example.In addition, in the case of not conflicting, the technology of this area
Not be the same as Example or the feature of example and non-be the same as Example or example described in this specification can be combined by personnel
And combination.
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, changed, replacing and modification, simultaneously for those of ordinary skill in the art, the think of according to the application
Think, will change in specific embodiments and applications.
Claims (10)
1. a kind of quick reduction reaction system of the circulating miberal powder that can carry hydrogen, including：Feed system, reactor, heating system,
Also Primordial Qi system and discharge system, wherein, the inner chamber of the reactor is divided into feed zone, reduction section and taper from top to bottom
Cooling section, the reactor is connected with feed system, also Primordial Qi system and discharge system respectively, it is characterised in that
The also Primordial Qi system includes：Also Primordial Qi gas handling system and reduction exhaust treatment system, described to go back Primordial Qi gas handling system bag
Include：Gas storage tank is reduced, Primordial Qi intake valve is gone back, carries hydrogen production device, heater, blower fan and air distribution plate, wherein, the reduction gas storage tank
It is connected through the also Primordial Qi intake valve with the entrance for carrying hydrogen production device, for being passed through also Primordial Qi in hydrogen production device to described carry；Institute
State and put forward the first outlet of hydrogen production device and be connected with the entrance of the heater, the second outlet for carrying hydrogen production device and the blower fan
It is connected, for that also Primordial Qi will carry out carrying hydrogen, produces richness CO gases and hydrogen；The blower fan is connected with air distribution plate, the air distribution plate
Positioned at the taper cooling section, for the rich CO gases to be quickly passed through into the taper cooling section, carried out with reduzate inverse
To heat exchange and carburization reaction；The heater and the multiple also Primordial Qi secondary air inlet phases set in the sidewall of reactor
Even, for the hydrogen of the heater will to be passed through with being obtained after the reduction exhaust treatment system processing from the hydrogen production device that carries
After the unreacted also Primordial Qi Hybrid Heating arrived, the reduction section of the reactor is passed through；
The reduction exhaust treatment system is connected with the reduction offgas outlet and the heater of the reactor respectively, is formed
Also Primordial Qi circulation loop, after reduction tail gas is handled, is passed through in the reactor again.
2. the quick reduction reaction system of miberal powder according to claim 1, it is characterised in that the reactor includes：One layer
Or multilayer also Primordial Qi secondary air inlet, the multilayer also Primordial Qi secondary air inlet is distributed in along the height for reactor direction
On the side wall of the reactor and positioned at the bottom of the reduction section and circumferentially disposed along reactor；The also Primordial Qi two of each layer
Secondary air inlet is provided with the different nozzle of multiple length, side wall circle alternate ring cloth of the nozzle along the reactor, for controlling
System also distribution of the Primordial Qi in the reactor inner chamber radially.
3. the quick reduction reaction system of miberal powder according to claim 1, it is characterised in that the heating system is located at described
In reduction section, including：Central gas conduit and the multilayer heat accumulation type radiant tube arranged along the height for reactor direction, every layer of institute
Heat accumulation type radiant tube is stated provided with many U-shaped heat accumulation type radiant tubes being located in same level, the U-shaped heat accumulation type radiant tube edge
The central gas conduit circumferential ring cloth and be connected with central gas conduit, for accurately control temperature field in reactor and
Thermograde, up and down heat accumulation type radiant tube described in two layers set in the way of relative rotation angle so that the U-shaped heat accumulating type spoke of each layer
Penetrate that pipe is not overlapping, the miberal powder caused to fall and break is evenly distributed.
4. the quick reduction reaction system of miberal powder according to claim 3, it is characterised in that the relative rotation angle is
0 ° -180 °/n, wherein n is the quantity of every layer of heat accumulation type radiant tube；The side wall of the reduction section is provided with and the accumulation of heat
The air intake and fuel gas inlet of formula radiant tube connection, the air intake and fuel gas inlet are respectively positioned on the heat accumulation type radiant tube
Bottom.
5. the quick reduction reaction system of miberal powder according to claim 1, it is characterised in that the feed system includes：It is former
Feed bin, bucket are carried and feed auger, wherein, the bucket is carried respectively with raw material cabin and positioned at the feed auger phase of the reactor top
Even, for carrying material, the feed auger is connected with the charging aperture of reactor.
6. the quick reduction reaction system of miberal powder according to claim 1, it is characterised in that the also Primordial Qi gas handling system is also
Including：Nitrogen storage tank and nitrogen intake valve, wherein, the nitrogen storage tank is connected through nitrogen intake valve with the blower fan, for
Also Primordial Qi carries out nitrogen purging before entering the reactor to whole system, to ensure that whole system is in nonoxidizing atmosphere
In；The reduction exhaust treatment system includes：Wash cooling device, compression set and decarbonization device, wherein, the wash cooling
Device one end is connected with the reduction offgas outlet, and its other end is connected with compression set and decarbonization device successively, the decarburization
Device is connected with the entrance of the heater, for reduction tail gas to be handled, obtains unreacted also Primordial Qi and leads to again
Enter in the heater.
7. the quick reduction reaction system of miberal powder according to claim 1, it is characterised in that the discharge system includes：Heat
Briquetting device, cooling device and product feed bin, wherein, described hot pressing block assembly one end and the reduzate of the reactor are exported
Be connected, be readily transported for powdery reduzate to be processed as into block product, its other end successively with cooling device and product material
Storehouse is connected.
8. the quick reduction reaction system of miberal powder according to claim 2, it is characterised in that the reactor also includes：Also
Former offgas outlet, charging aperture, reduzate outlet and exhanst gas outlet, the reduction offgas outlet are located at the side wall of the reactor
The top of upper and described reduction section, charging aperture is located at the top of the reactor, and the reduzate outlet is located at the reaction
The bottom of device, the exhanst gas outlet is located in the upper portion side wall of reactor and is connected with the central gas conduit.
9. a kind of quick reduction reaction system of miberal powder using any one of claim 1-8 carries out miberal powder, quickly reduction is anti-
The method answered, it is characterised in that comprise the following steps：
A. the nitrogen intake valve and blower fan are opened, nitrogen rapidly enters progress air displacement in reactor, and then to whole system
System carries out nitrogen purging, whole system is in nonoxidizing atmosphere；
B. after nitrogen purging is finished, the temperature of heat accumulation type radiant tube in the reactor is set, the storage is passed through by adjustment
The gas flow and air mass flow of hot type radiant tube, realize accurate temperature control；
C. after reactor inner chamber temperature reaches preset value and stabilization, nitrogen air intake valve is closed, also Primordial Qi air inlet is opened
Valve, reducing gas enters reactor reduction section, is carried again by bucket afterwards the miberal powder in raw material cabin being promoted to the feed auger
In again through the charging aperture enter reactor in：When opening the also Primordial Qi intake valve, reduction is passed through in hydrogen production device to described carry
Gas carries out carrying hydrogen, produces richness CO gases and hydrogen, the rich CO gases pass sequentially through blower fan and air distribution plate enters taper cooling section,
Carry out reverse heat exchange and carburization reaction with reduzate, the hydrogen be passed through in the heater with from the reduction tail gas
The unreacted also Primordial Qi Hybrid Heating that processing system is obtained after handling is hot also Primordial Qi, and hot also Primordial Qi is gone back through the multiple
Primordial Qi secondary air inlet is passed through the reduction section and carries out reduction reaction with miberal powder；
D. the reduzate for reacting generation is discharged from the bottom of the reactor, and forms block production through the hot pressing block assembly
Thing, then product feed bin is sent into after being cooled down through cooling device；
E. the reduction tail gas after reduction reaction is participated in discharge from the reduction offgas outlet, and scrubbed cooling device, pressure successively
Unreacted also Primordial Qi, which is obtained, after compression apparatus progress cooling and dedusting corresponding with decarbonization device, compression, decarburization is passed through the heating again
In device.
10. method according to claim 9, it is characterised in that in the step c, reactor inner chamber temperature
Stable preset value is 900-1200 DEG C；The hot reduction temperature degree heated in the heater is 800-1000 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710613578.8A CN107227385A (en) | 2017-07-25 | 2017-07-25 | A kind of quick reduction reaction system and method for the circulating miberal powder that can carry hydrogen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710613578.8A CN107227385A (en) | 2017-07-25 | 2017-07-25 | A kind of quick reduction reaction system and method for the circulating miberal powder that can carry hydrogen |
Publications (1)
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| Country | Link |
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