CN107227388A - Reduction reaction device for granular material - Google Patents
Reduction reaction device for granular material Download PDFInfo
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- CN107227388A CN107227388A CN201710613084.XA CN201710613084A CN107227388A CN 107227388 A CN107227388 A CN 107227388A CN 201710613084 A CN201710613084 A CN 201710613084A CN 107227388 A CN107227388 A CN 107227388A
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- Prior art keywords
- air
- blanking
- reduction
- outlet
- channel
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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
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct processes
- C21B13/04—Making spongy iron or liquid steel, by direct processes in retorts
Abstract
The invention discloses a kind of reduction reaction device for granular material, the reduction reaction device for granular material includes：Reaction chamber is limited in reacting furnace-e/or, the reacting furnace-e/or, reacting furnace-e/or is provided with the charging aperture for connecting and being spaced with the reaction chamber, also discharging opening, Primordial Qi import and reduction offgas outlet；Heater, heater is in the reaction chamber and is located between charging aperture and the discharging opening to provide heat to the reduction reaction of material；At least one feed nozzle, the feed nozzle is at the charging aperture, and feed nozzle is configured to enter material injection in the reaction chamber and so that the material entered in the reaction chamber scatter on the cross section of reaction chamber.According to the reduction reaction device of the present invention, feed smooth and material and be distributed on the cross section of reduction reaction device more uniformly, quickly can fully be reacted between material and reducing gas, greatly improve reduction reaction efficiency.
Description
Technical field
The present invention relates to metallurgical technology field, more particularly, to a kind of reduction reaction device for granular material.
Background technology
In correlation technique, the reduction reaction device for granular material, which exists, to be fed uneven, charging rate slowly and enters
The problems such as material mouth sealing is poor, so that cause the reduction reaction efficiency of material low, and reduction reaction is not thorough enough.
The content of the invention
It is contemplated that at least solving one of technical problem in correlation technique to a certain extent.Therefore, the present invention is carried
Go out a kind of reduction reaction device for granular material, the reduction reaction device feeds smooth and material in reduction reaction device
Cross section on be distributed more uniform, quickly can fully be reacted between material and reducing gas, greatly improve reduction reaction effect
Rate.
Reduction reaction device for granular material according to embodiments of the present invention, including：Reacting furnace-e/or, the reacting furnace
Body includes the feed zone, reduction section and the cooling section that communicate with each other, the reduction section be located at the lower section of the feed zone and with it is described
Feed zone is connected, and the cooling section is connected below the reduction section and with the reduction section, is set at the top of the feed zone
Have a charging aperture, the bottom of the cooling section is provided with discharging opening, the lower section of the feed zone provided with reduction offgas outlet, it is described go out
Provided with also Primordial Qi import on material mouth, the charging aperture is connected with the feed zone, the reduction offgas outlet, the also Primordial Qi
Import and the discharging opening are connected with the reduction section；Heater, the heater is wrapped in the reduction section
Multiple heat accumulation type radiant tubes are included, the two ends of the heat accumulation type radiant tube are respectively equipped with burner；At least one feed nozzle, it is described
Feed nozzle limits vertically extending blanking channel and air channel at the charging aperture in the feed nozzle,
The feed nozzle is configured to material injection be entered in the reaction chamber and caused the material entered in the reaction chamber
It is scatter on the cross section of reaction chamber.
Reduction reaction device for granular material according to embodiments of the present invention, by setting charging spray at charging aperture
Mouth, material is entered in reaction chamber by feed nozzle, causes material can be with smooth, quick by the ejector action of feed nozzle
Ground enters in reaction chamber, it is to avoid charging aperture is blocked；In addition, feed nozzle can be by material in the cross section of reaction chamber
On scatter, can not only avoid the problem of material occurs to bond, and material and reducing gas can be sufficiently mixed, material by
Heat is more uniform, reacts more fully and quick between material and reducing gas, thus greatly improves the reduction reaction effect of material
Rate.
In addition, the reduction reaction device for granular material according to embodiments of the present invention, can also have following additional
Technical characteristic：
According to one embodiment of present invention, limited in the feed nozzle it is vertically extending and from inside to outside according to
Air inlet and blanking are respectively equipped with the top of secondary nested blanking channel and air channel, the top in the air channel and the blanking channel
The bottom of import, the bottom in the air channel and the blanking channel be respectively equipped with the air outlet that is connected with the reaction chamber and under
Material outlet, the blanking outlet guiding discharging straight down, air outlet guiding air-out downwards on the direction of ecto-entad.
Alternatively, the air channel has in interior foreign side relative inner and outer wall upwards, the inwall and the outer wall
One of them is provided with that can descend mobile tune wind to bore, and another in the inwall and the outer wall is between the tune wind cone
Limit the air outlet of variable area.
According to one embodiment of present invention, limited in the feed nozzle it is vertically extending and from inside to outside according to
Secondary the first nested air channel, blanking channel and the second air channel, top, the top of the blanking channel and the institute in first air channel
State and the first air inlet, blanking import and the second air inlet are respectively equipped with the top of the second air channel, the bottom in first air channel, institute
The bottom of the bottom and second air channel of stating blanking channel be respectively equipped with connected with the reaction chamber the first air outlet, under
Material outlet and the second air outlet, the blanking outlet guiding discharging straight down, first air outlet is in side from inside to outside
Guiding air-out upwards, second air outlet guides air-out or derived downwards on the direction of ecto-entad straight down
Wind.
Alternatively, first air channel includes the first paragraph and second segment connected along the vertical direction, and the first paragraph is formed
For vertically extending column structure, the cross-sectional area of the second segment gradually increases on the direction from top to bottom, institute
At least a portion for stating second segment is stretched into the reaction chamber and under blanking outlet and second air outlet
Side, first air inlet is on the roof of the first paragraph, and first air outlet is on the side wall of the second segment.
Alternatively, first air outlet includes multiple and circumferentially spaced on the side wall of the second segment.
Alternatively, the scope of the angle α between the center line and vertical direction of first air outlet is 2 °~10 °.
Alternatively, second air channel has in interior foreign side relative inner and outer wall upwards, the inwall and described outer
One of them of wall is provided with that can descend mobile tune wind to bore, and another in the inwall and the outer wall is bored with the tune wind
Between limit second air outlet of variable area.
According to one embodiment of present invention, the reduction offgas outlet is on the side wall of the feed zone.
Alternatively, the cooling section includes air-cooled region and connected below the air-cooled region and with the air-cooled region
Logical water cooling region, the also Primordial Qi import is on the side wall in the air-cooled region.
The additional aspect and advantage of the present invention will be set forth in part in the description, and will partly become from the following description
Obtain substantially, or recognized by the practice of the present invention.
Brief description of the drawings
The above-mentioned and/or additional aspect and advantage of the present invention will become from description of the accompanying drawings below to embodiment is combined
Substantially and be readily appreciated that, wherein：
Fig. 1 is the structural representation of the reduction reaction device for granular material according to embodiments of the present invention；
Fig. 2 is the structural representation of feed nozzle according to an embodiment of the invention；
Fig. 3 is the structural representation of feed nozzle in accordance with another embodiment of the present invention.
Reference：
Reduction reaction device 100；
Reacting furnace-e/or 1；Feed zone 11；Charging aperture 111；Reduce offgas outlet 112；
Reduction section 12；
Cooling section 13；Air-cooled region 131；Also Primordial Qi import 1311；Air distribution plate 1312；
Water cooling region 132；Discharging opening 1321；Water-cooling wall 1322；
Heater 2；Heat accumulation type radiant tube 21；Fuel gas inlet 211；Air intake 212；Exhanst gas outlet 213；
Feed nozzle 3；Blanking channel 31；Blanking import 311；Blanking outlet 312；
Air channel 32；Air inlet 321；Air outlet 322；Inwall 323；Outer wall 324；Adjust wind cone 325；
Blanking channel 301；Blanking import 3011；Blanking outlet 3012；
First air channel 302；First air inlet 3021；First air outlet 3022；First paragraph 3023；Second segment 3024；
Second air channel 303；Second air inlet 3031；Second air outlet 3032；Inwall 3033；Outer wall 3034；Adjust wind cone
3035。
Embodiment
Embodiments of the invention are described below in detail, the example of the embodiment is shown in the drawings, wherein from beginning to end
Same or similar label represents same or similar element or the element with same or like function.Below with reference to attached
The embodiment of figure description is exemplary, is only used for explaining the present invention, and is not considered as limiting the invention.
In the description of the invention, it is to be understood that term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width ",
" thickness ", " on ", " under ", "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom " " interior ", " outer ", " up time
The orientation or position relationship of the instruction such as pin ", " counterclockwise ", " axial direction ", " radial direction ", " circumference " be based on orientation shown in the drawings or
Position relationship, is for only for ease of the description present invention and simplifies description, rather than indicate or imply that the device or element of meaning must
There must be specific orientation, with specific azimuth configuration and operation, therefore be not considered as limiting the invention.In addition, art
Language " first ", " second " are only used for describing purpose, and it is not intended that indicating or implying relative importance or implicit indicate institute
The quantity of the technical characteristic of instruction.Thus, " first " is defined, one can be expressed or be implicitly included to the feature of " second "
Or more this feature.In the description of the invention, " multiple " are meant that two or more, unless otherwise clearly having
The restriction of body.
In the description of the invention, it is necessary to illustrate, unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected, or be integrally connected；Can
To be mechanical connection or electrical connection；Can be joined directly together, can also be indirectly connected to by intermediary, Ke Yishi
The connection of two element internals or the interaction relationship of two elements.For the ordinary skill in the art, can be with
The concrete meaning of above-mentioned term in the present invention is understood as the case may be.
In the present invention, unless otherwise clearly defined and limited, fisrt feature second feature it " on " or it " under "
Can directly it be contacted including the first and second features, it is not direct contact but by it that can also include the first and second features
Between other characterisation contact.Moreover, fisrt feature second feature " on ", " top " and " above " to include first special
Levy directly over second feature and oblique upper, or be merely representative of fisrt feature level height higher than second feature.Fisrt feature exists
Second feature " under ", " lower section " and " following " fisrt feature that includes are immediately below second feature and obliquely downward, or be merely representative of
Fisrt feature level height is less than second feature.
The reduction reaction device 100 for granular material according to embodiments of the present invention is described below with reference to Fig. 1-Fig. 3, is needed
It is noted that granular material can be miberal powder for powder ore, such as can be as Iron Ore Powder, copper ore powder.
As shown in Figure 1-Figure 3, the reduction reaction device 100 for granular material according to embodiments of the present invention includes：Instead
Answer body of heater 1, heater 2 and at least one feed nozzle 3.
Reaction chamber is limited in reacting furnace-e/or 1, reacting furnace-e/or 1 is provided with entering for connecting and be spaced with reaction chamber
Material mouth 111, also discharging opening 1321, Primordial Qi import 1311 and reduction offgas outlet 112, heater 2 in the reaction chamber and
With to the reduction reaction of material offer heat between charging aperture 111 and discharging opening 1321.Specifically, material is by charging aperture
111 enter in reaction chamber, and reducing gas is entered in reaction chamber by also Primordial Qi import 1311, and material and reducing gas are in reaction
Mixing contact in chamber, heater 2 is heated to material and reducing gas, and miberal powder and reducing gas are heated into reaction
Reduction reaction occurs for required temperature, material and reducing gas, and reacts the reduzate produced and reduction tail gas respectively by going out
Material mouth 1321 and the reduction discharge reaction chamber of offgas outlet 112.
At least one feed nozzle 3, feed nozzle 3 can be provided only with one at charging aperture 111 at charging aperture 111
Individual feed nozzle 3 or provided with multiple feed nozzles 3 (such as can be provided with two or more feed nozzles 3), charging
Nozzle 3 is configured to enter material injection in reaction chamber and causes the material entered in reaction chamber in the transversal of reaction chamber
It is scatter on face.
Reduction reaction device 100 for granular material according to embodiments of the present invention, by being set at charging aperture 111
Feed nozzle 3, material is entered in reaction chamber by feed nozzle 3, make it that material can be with by the ejector action of feed nozzle 3
It is smooth, be rapidly introduced into reaction chamber, it is to avoid charging aperture 111 is blocked；In addition, feed nozzle 3 can be by material anti-
Answer and scatter on the cross section of chamber, can not only avoid the problem of material occurs to bond, and material and reducing gas can be with
It is sufficiently mixed, material is uniformly heated, reacts more fully and quick between material and reducing gas, thus greatly improve thing
The reduction reaction efficiency of material.
In one embodiment of the invention, as shown in Fig. 2 charging aperture 111 is located at the roof of reacting furnace-e/or 1, charging spray
Vertically extending and nested blanking channel 31 and air channel 32, i.e. blanking channel 31 successively from inside to outside is limited in mouth 3
It is embedded in air channel 32, is enclosed on the outside of blanking channel 31 outside air channel 32 in other words, blanking channel 31 and air channel 32 is spaced apart,
The top in air channel 32 and the top of blanking channel 31 are respectively equipped with air inlet 321 and blanking import 311, and the bottom in air channel 32 is with
The bottom of material passage 31 is respectively equipped with the air outlet 322 connected with reaction chamber and blanking outlet 312, i.e. the top in air channel 32 is set
There is air inlet 321, the top of blanking channel 31 is provided with blanking import 311, and the bottom in air channel 32 is provided with air outlet 322, and blanking is led to
The bottom in road 31 is connected provided with blanking outlet 312, wherein air outlet 322 and blanking outlet 312 with reaction chamber, blanking outlet
312 guiding dischargings straight down, the guiding air-out downwards on the direction of ecto-entad of air outlet 322.It should be noted that " interior "
The position of the neighbouring central axis of blanking channel 31 is referred to, " outer " refers to the position away from the central axis of blanking channel 31.
Specifically, material is entered in blanking channel 31 by blanking import 311, and discharges blanking by blanking outlet 312
It is suitable to the air-flow for being passed through specific flow velocity in passage 31, air channel 32, air-flow is entered in air channel 32 by air inlet 321, and by going out
Air channel 32 is discharged in air port 322, is discharged by making blanking export 312 guidings straight down, air outlet 322 is in the direction of ecto-entad
Upper guiding air-out downwards, the airflow injection that the material for so exporting 312 discharges by blanking will be discharged by air outlet 322 enters
In reaction chamber, charging is smooth, quick, and the guiding air-out, air-flow downwards on the direction of ecto-entad due to air outlet 322
Turbulent flow is formed at air outlet 322, in the presence of air-flow, material scatter on the cross section of reaction chamber, thus not only
The problem of material occurs cohesive in reaction chamber can be avoided, and material and reducing gas can be sufficiently mixed, and material is heated
It is more uniform, react more fully and quick between material and reducing gas, thus greatly improve the reduction reaction efficiency of material.
Alternatively, the air-flow being passed through in air channel 32 is the inert gas flows such as nitrogen stream, argon gas stream；Preferably, in air channel 32
The air-flow being passed through is reducing gas stream, for example, can be made up of for hydrogen stream, CO gas stream or hydrogen and carbon monoxide
Mixed gas stream, the air-flow of discharge can not only play a part of injection and dispersed material so in the air channel 32, and also
The reduction reaction of material can be directly participated in, material and reducing gas can be more sufficiently mixed, reduction reaction is more quick and fills
Point, furthermore it is also possible to save, also Primordial Qi import 1311 is set in addition on reacting furnace-e/or 1.
Preferably, as shown in Figure 2, blanking outlet 312 is higher than air outlet 322, and such air-flow will export 312 in blanking
Lower section is exported, and air-flow exports 312 turbulent flow formed below in blanking, and the material of 312 discharges is exported by air-flow point by blanking
Injection enters in reaction chamber again after dissipating, and material can be dispersed throughout, and thus avoid partial material from not being dispersed through and directly enter
Enter in reaction chamber.
As shown in Figure 2, air outlet 322 is formed as loop configuration, and it is disorderly that the air-flow so discharged by air outlet 322 is formed
The turbulence factor of stream is bigger, more preferable to the dispersion effect of material, and material is distributed more equal on the cross section of reaction chamber
It is even.Preferably, as shown in Figure 2, the outward flange of air outlet 322 is connected with the edge of the charging aperture 111 of reacting furnace-e/or 1, air-out
It can be weldingly connected or be integrally formed between the outward flange of mouth 322 and the edge of the charging aperture 111 of reacting furnace-e/or 1, so that
The better tightness of reacting furnace-e/or 1.
It should be understood that the flow velocity for the air-flow being passed through in air channel 32 can be according to the type and the input amount of material of material
To be set, such as when the input amount of material is larger, the air-flow of larger flow velocity can be passed through, when the input amount of material is smaller
When, the air-flow of smaller flow velocity can be passed through, to ensure that material is disperseed in the presence of air-flow on the cross section of reaction chamber
Open, the reduction reaction speed of material is faster and reaction is more abundant.
In the preferred exemplary of the present invention, air channel 32 has in interior foreign side upward relative inwall 323 and outer wall
324, one of them of inwall 323 and outer wall 324 are provided with mobile tune wind can be descended to bore in 325, inwall 323 and outer wall 324
Another limit the air outlet 322 of variable area between wind cone 325 adjusting.Specifically, in some examples of the present invention,
As shown in Figure 2, the inwall 323 in air channel 32 is provided with tune wind cone 325 moving up and down, adjusts the outer of wind cone 325 and air channel 32
The air outlet 322 of variable area is limited between wall 324；In other examples of the present invention, set on the outer wall 324 in air channel 32
There is tune wind cone 325 moving up and down, the air outlet of variable area is limited between the inwall 323 and tune wind cone 325 in air channel 32
322.Wind cone 325 is being adjusted by mobile in the vertical direction, the air-out area of air outlet 322 is being can control, it is possible thereby to adjust
The flow velocity of air-flow at air outlet 322, in the case that the throughput that is passed through within the unit interval in air channel 32 is constant, works as air outlet
During 322 area increase, the air-flow velocity at air outlet 322 will reduce, when the area of air outlet 322 reduces, air outlet 322
The air-flow velocity at place will increase, i.e., be the air-flow velocity at adjustable air outlet 322 by adjusting the position of wind cone 325,
Step-less adjustment of the air-flow velocity in the range of 60~120m/s at air outlet 322 can be for example realized, to match reaction chamber
Interior different inventory.
In a preferred embodiment of the invention, wind is adjusted to bore 325 for a ring, on the outer wall for being enclosed on blanking channel 31, Gu
It is detachable to determine mode, for example, fixed by nut.When needing to adjust the position of wind cone 325, loosen nut, make tune wind
Cone 325 is when moving up and down to correct position, then makes tune wind bore 325 by tightening up nut to fix.According to inlet amount number and work
Skill requirement can adjust wind direction situation in air channel by adjusting the position that wind is bored.
In one embodiment of the invention, as shown in figure 3, charging aperture 111 is located at the roof of reacting furnace-e/or 1, charging spray
Vertically extending and nested the first air channel 302, the wind of blanking channel 301 and second successively from inside to outside are limited in mouth 3
Road 303, the top at the top in the first air channel 302, the top of blanking channel 301 and the second air channel 303 is respectively equipped with the first air intake
Mouth 3021, the air inlet 3031 of blanking import 3011 and second, bottom, the bottom of blanking channel 301 and second in the first air channel 302
The bottom in air channel 303 is respectively equipped with the first air outlet 3022 connected with reaction chamber, blanking outlet 3012 and the second air outlet
3032, the guiding discharging straight down of blanking outlet 3012, the first air outlet 3022 is derived upwards on direction from inside to outside
Wind, the second air outlet 3032 guides air-out or the guiding air-out downwards on the direction of ecto-entad straight down.Need explanation
It is that " interior " refers to the position of neighbouring first air channel 302 central axis, " outer " is referred to away from the central axis of the first air channel 302
Position.
Specifically, material is entered in blanking channel 301 by blanking import 3011, and by under the discharge of blanking outlet 3012
The air-flow of specific flow velocity is each led into material passage 301, the first air channel 302 and the second air channel 303, the first air-flow enters by first
Air port 3021 enters in the first air channel 302 and discharged by the first air outlet 3022, and the second air-flow passes through the second air inlet 3031
Discharged in into the second air channel 303 and by the second air outlet 3032, material enters blanking channel 301 by blanking import 3011
It is interior and pass through blanking outlet 3012 discharge blanking channels 301.By making blanking export 3012 guiding dischargings straight down, first goes out
The guiding air-out upwards on direction from inside to outside of air port 3022, the second air outlet 3032 guides air-out or by outer straight down
Guiding air-out downwards in inward direction so that the first air-flow for being flowed out by the first air outlet 3022 and by the second air outlet 3032
Turbulent flow is formed between second air-flow of outflow, in the presence of air-flow, material scatter on the cross section of reaction chamber, thus
The problem of material occurs cohesive in reaction chamber can be not only avoided, and material and reducing gas can be sufficiently mixed, material
It is uniformly heated, reacts more fully and quick between material and reducing gas, thus greatly improve the reduction reaction of material
Efficiency.
Alternatively, the air-flow being passed through in the first air channel 302 and the second air channel 303 is the inert gases such as nitrogen stream, argon gas stream
Stream；Preferably, the air-flow being passed through in the first air channel 302 and the second air channel 303 is reducing gas stream, for example can for hydrogen stream,
CO gas stream or the mixed gas stream being made up of hydrogen and carbon monoxide, so by the first air channel 302 and the second air channel
The air-flow of discharge can not only play a part of injection and dispersed material in 303, and can also directly participate in the reduction of material
Reaction, material and reducing gas can be more sufficiently mixed, and reduction reaction is more quick and abundant, furthermore it is also possible to save anti-
Answer and also Primordial Qi import 1311 is set in addition on body of heater 1.
Preferably, as shown in Figure 3, blanking outlet 3012 is higher than the first air outlet 3022 and the second air outlet 3032, this
The air-flow of sample first and the second air-flow export the lower section that 3012 are exported in blanking, and the first air-flow and the second air-flow are exported in blanking
3012 turbulent flow formed below, by the materials of the discharge of blanking outlet 3012, injection enters reaction chamber again after air-flow is scattered
Interior, material can be dispersed throughout, and thus avoid partial material from not being dispersed through and be directly entered in reaction chamber.
As shown in figure 3, the first air channel 302 includes the first paragraph 3023 and second segment 3024 connected along the vertical direction, first
Section 3023 is formed as vertically extending column structure, the cross-sectional area of second segment 3024 on direction from top to bottom by
Cumulative big, at least a portion of second segment 3024 is stretched into reaction chamber and positioned at blanking outlet 3012 and the second air outlet 3032
Lower section, the first air inlet 3021 located at first paragraph 3023 roof on, the first air outlet 3022 be located at second segment 3024 side
On wall.Further, the scope of the angle α between the center line and vertical direction of the first air outlet 3022 is 2 °~10 °, i.e., the
Angle α between the center line and vertical direction of one air outlet 3022 is more than or equal to 2 ° and less than or equal to 10 °, by by the
Angle α between the center line and vertical direction of one air outlet 3022 is controlled at 2 °~10 °, is derived by the first air outlet 3022
Air-flow can open material is fully dispersed, material is distributed more uniform on the cross section of reaction chamber.
Alternatively, the first air outlet 3022 include it is multiple and circumferentially spaced on the side wall of second segment 3024, first
Air outlet 3022 can be formed as circular hole of the aperture in the range of 10~20mm, and the number of the first air outlet 3022 is 5~20
It is individual, so that the dispersion effect of material is more preferable.
As shown in Figure 3, the second air outlet 3032 is all formed as loop configuration, is so discharged by the second air outlet 3032
The turbulence factor of the turbulent airflow of air-flow formation is bigger, more preferable to the dispersion effect of material, and material is in the cross section of reaction chamber
Upper distribution is more uniform.Preferably, as shown in Figure 3, the outward flange of the second air outlet 3032 and the charging aperture of reacting furnace-e/or 1
111 edge is connected, and can be welded between the edge of the outward flange of the second air outlet 3032 and the charging aperture 111 of reacting furnace-e/or 1
It is connected or is integrally formed, so that the better tightness of reacting furnace-e/or 1.
In the preferred exemplary of the present invention, the second air channel 303 has in the upward relative He of inwall 3033 of interior foreign side
One of them of outer wall 3034, inwall 3033 and outer wall 3034, which are provided with, can descend mobile tune wind to bore 3035, the He of inwall 3033
Another in outer wall 3034 bores the second air outlet 3032 that variable area is limited between 3035 tune wind.
Specifically, in some examples of the present invention, as shown in Figure 3, the inwall 3033 in the second air channel 303 is provided with can
The tune wind cone 3035 moved up and down, adjusts and limits the of variable area between wind cone 3035 and the outer wall 3034 in the second air channel 303
Two air outlets 3032；In other examples of the present invention, the outer wall 3034 in the second air channel 303 is adjusted provided with moving up and down
Wind cone 3035, limits the second air outlet 3032 of variable area between the inwall 3033 and tune wind cone 3035 in the second air channel 303.
Wind cone 3035 is being adjusted by mobile in the vertical direction, the air-out area of the second air outlet 3032 is being can control, it is possible thereby to adjust
The flow velocity of the air-flow at the second air outlet 3032 is saved, the constant feelings of the throughput being passed through within the unit interval in the second air channel 303
Under condition, when the area increase of the second air outlet 3032, the air-flow velocity at the second air outlet 3032 will reduce, when the second air-out
When the area of mouth 3032 reduces, the air-flow velocity at the second air outlet 3032 will increase, that is, pass through to adjust and adjust wind cone 3035
Position is the air-flow velocity at adjustable second air outlet 3032, for example, can realize the air-flow velocity at the second air outlet 3032
Step-less adjustment in the range of 60~120m/s, to match inventorys different in reaction chamber.
In actual production process, angle α between the center line and vertical direction of the first air outlet 3022 is set
After size and wind speed, feed nozzle control system can calculate the position for adjusting wind cone 3035 and divide according to different technological parameters
With air force, so as to ensure under different inventorys, material can be dispersed throughout out, it is ensured that charging is smooth, quick
With it is uniform.
Preferably, the height of wind cone 3035 is adjusted to be higher than the height of the first air outlet 3022, so that the first air outlet
The air-flow at air-flow and the second air outlet 3032 at 3022 does not hinder each other, formed below in blanking outlet 3012
The turbulence factor of turbulent airflow is higher, and material is opened by uniform, fully dispersed, and material is distributed more on the cross section of reaction chamber
Uniformly.
In one embodiment of the invention, as shown in fig. 1, reaction chamber includes from top to bottom setting gradually and each other
Feed zone 11, reduction section 12 and the cooling section 13 of connection, charging aperture 111 are located at the top of feed zone 11, and discharging opening 1321 is located at
The bottom of cooling section 13, heater 2 is in reduction section 12, and reduction offgas outlet 112 is on the side wall of feed zone 11.Enter
One step, cooling section 13 includes air-cooled region 131 and the water cooling connected below air-cooled region 131 and with air-cooled region 131
Region 132, also Primordial Qi import 1311 is on the side wall in air-cooled region 131.
The type of heater 2 is not particularly limited, as long as stable reaction temperature can be provided for reduction reaction device 100
Degree, can be the either multiple high-temperature heating circle compositions of heat accumulating type heater 2 that multiple heat accumulation type radiant tubes 21 are constituted
Heater 2 etc..
Heater 2 can be made up of many heat accumulation type radiant tubes 21, be that the reduction reaction in reduction reaction device 100 is carried
Supplying heat source.Heat accumulation type radiant tube 21 is respectively arranged with burner (not shown) at body two ends, and burner combustion is produced at one end
Raw flame forms thermograde when spraying, i.e. gradually reduced from the outside temperature of burner.Similarly, fired in the other end
The flame that burner burning is produced also forms thermograde when spraying.When the burner at two ends alternately burns, formed
The superposition of two thermogrades so that the whole bulk temperature of heat accumulation type radiant tube 21 is uniform.For example, single heat accumulation type radiant tube 21
On temperature difference be not more than 30 DEG C.Inside reduction reaction device 100, many heat accumulation type radiant tubes 21, which are vertically spaced, to be divided
Cloth.So, it is ensured that each regional temperature is evenly distributed.The temperature in temperature field can be adjusted in several ways, for example, adjustment stores
Number of the hot type radiant tube 21 in the horizontal direction and/or on vertical direction, the number of plies of heat accumulation type radiant tube 21, heat accumulation type radiant tube
Spacing (vertical direction and/or horizontal direction) between 21 and each heat accumulation type radiant tube 21 temperature of itself etc..
For example shown in Fig. 1, heater 2 includes multiple heat accumulation type radiant tubes 21, and each heat accumulation type radiant tube 21 is along vertical
Direction is disposed side by side in reduction section 12, is conducive to uniformly heating material and reducing gas in reduction section 12, it is to avoid anti-
Answer and there is the problem of temperature distributing disproportionation is even in chamber, meanwhile, also help material and fallen using free gravity, it is unobstructed,
Ensure that material falls smooth.The side wall of reduction section 12 is provided with fuel gas inlet 211, the air being connected with heat accumulation type radiant tube 21
Entrance 212 and exhanst gas outlet 213, fuel gas inlet 211 are used to input combustion gas, and air intake 212 is combustion air inlet 212, is used
In input combustion air, exhanst gas outlet 213 is used to export flue gas so that combustion gas and air, which enter in heat accumulation type radiant tube 21, to be occurred
Combustion reaction, the high-temperature flue gas of generation is provided after heat for material reduction reaction and discharged by exhanst gas outlet 213.It is preferred that, combustion
The main material transferred heat in the way of radiation in reduction reaction device 100 of heat and go back that gas and air burning are produced
Raw-gas, brings it about the fuel gas flow system and reduction reaction in reduction reaction acquisition reduzate, heat accumulation type radiant tube 21
Reduction flow of air system in device 100 is isolated from one another, does not interfere with the reduction process in reduction reaction device 100.
Further, the gas flow that can be passed through heat accumulation type radiant tube 21 by regulation can accurately control reduction reaction
Temperature field in device 100, it is possible thereby to temperature field number and thermograde in reduction reaction device 100 are controlled, realization pair
The accurate temperature controlling of reduction process in reduction reaction device 100.Thus, the heater 2, is realized to material in reduction section 12
Uniformly heated with reducing gas, it is to avoid the problem of temperature distributing disproportionation is even present in reaction chamber, meanwhile, also help
Material is fallen using free gravity, unobstructed, it is ensured that material falls smooth.
Material is added in reduction reaction device 100 via the feed zone 11 at the top of reduction reaction device 100, anti-in reduction
The reduction section 12 at the middle part of device 100 is answered to carry out reduction treatment.Under the heat effect of heater 2, the internal furnace temperature of reduction section 12
Spend higher (preferably, the burner hearth of reduction section 12 is heated to 900-1200 DEG C by heater 2), provided for the progress of reduction reaction
Advantage.In reduction section 12 reduction reaction occurs for material and reducing gas, and the reaction mechanism of material and reducibility gas is：
MexOy+CO→Me+CO2, MexOy+H2→Me+H2O.Because material particular diameter is small, heat transfer condition and reacting dynamics condition between gas-solid
Substantially improve, reduction reaction can be completed within the several seconds, realize the quick production process of DRI.In addition, material is passed through
Reduction section 12 is freely fallen to by feed zone 11, reducing gas is preheated via cooling section 13, and (reducing gas is preheated to
300-600 DEG C) reduction section 12 is freely risen to afterwards, both occur impact by convection, fully contact, occur chemistry
Reaction, obtains reduzate and reduction tail gas.
Cooling section 13 is located at the bottom of reduction reaction device 100, for carrying out cooling treatment to obtained reduzate.Institute
Air-cooled region 131 and water cooling region 132 that cooling section 13 includes setting gradually from top to bottom are stated, successively the reduzate to obtaining
Carry out cooling treatment.The also Primordial Qi import 1311 is provided with air distribution plate 1312, for introducing reducing gas to hot reduzate
Preliminary cooling treatment is carried out, in order to the normal temperature reducing gas that will be reacted the hot reduzate of generation and have just enter into reactor
Heat exchange processing is carried out, the reduzate tentatively cooled down (temperature is down to 600-900 DEG C) and pre-warmed reducing gas are (pre-
Heat is to 300-600 DEG C)；Wherein, the reduzate tentatively cooled down is constantly fallen due to self gravitation, into water cooling region
132 carry out secondary cooling processing；The pre-warmed reducing gas constantly freely rises, and enters reduction section 12 and miberal powder is carried out
Reduction treatment；Thus, the heat exchange processing in air-cooled region 131, had both realized the preliminary cooling to hot reduzate, had been conducive to again
Reducing gas after preheating, which enters after reduction section 12, to be rapidly heated and reacts, and takes full advantage of the heat of reduzate, reduces life
The energy expenditure of production process, reduces production cost.The water cooling region 132 is surrounded by water-cooling wall 1322, anti-for absorbing
Answer the heat of reduzate in device burner hearth；Wherein, water-cooling wall 1322 is the important component in water cooling region 132, is distributed in reactor
Bottom surrounding, inside is the water or steam of flowing, for the heat of reduzate in absorbing reaction body of heater 1, realizes reduzate
Reducing temperature twice.The shape of the cooling section 13 is not particularly limited, as long as reduzate can be made smoothly to fall.Enter one
Step, the cooling section 13 is tapered, is conducive to reduzate constantly to fall using self gravitation and carries out comprehensive cooling
Processing.
In addition, reduction offgas outlet 112 is on the side wall of feed zone 11, the reduction tail gas of high temperature and by feed nozzle 3
Impact occurs by convection for the material that injection enters feed zone 11, and the reduction tail gas of high temperature plays preheating to material and made
With, make full use of reduction tail gas heat, reduce production process energy expenditure.
Describe what two reduction reaction devices 100 for granular material using the embodiment of the present invention were reduced below
Specific example.
Embodiment one：The quick restoring method of the present embodiment material (Iron Ore Powder), comprises the following steps：
(1), iron ore concentrate is added in reaction chamber from the feed nozzle 3 of reduction reaction device 100；
(2), iron ore concentrate Iron grade is 65%, and the ratio that mineral powder granular particle diameter is less than 0.074mm is no less than 80%；
(3), the temperature of heat accumulation type radiant tube 21 of the reduction section 12 of reduction reaction device 100 is set to 950 DEG C；
(4), normal temperature also Primordial Qi is passed through in reaction chamber from the also Primordial Qi import 1311 in air-cooled region 131, with iron ore concentrate
Carry out reduction reaction；
(5), CO volume fractions are 80%, H also in Primordial Qi2Volume fraction is 15%；
(6), the effect that also Primordial Qi is heated in uphill process by heat accumulation type radiant tube 21 heats up, the Iron Ore Powder with whereabouts
Exchanged heat and occur reduction reaction, reduction offgas outlet 112 of the reduction tail gas through feed zone 11 discharges reduction reaction device
100；
(7), discharging opening 1321 discharge reduction reaction device of the metallization powder of reaction generation through reduction reaction device 100
100；
(8), the degree of metalization of metallization powder iron is 95%.
Embodiment two：The quick restoring method of the present embodiment material (Iron Ore Powder), comprises the following steps：
(1), iron ore concentrate is added in reaction chamber from the feed nozzle 3 of reduction reaction device 100；
(2), iron ore concentrate Iron grade is 65%, and the ratio that mineral powder granular particle diameter is less than 1mm is no less than 80%；
(3), the temperature of heat accumulation type radiant tube 21 of the reduction section 12 of reduction reaction device 100 is set to 950 DEG C；
(4), normal temperature also Primordial Qi is passed through in reaction chamber from the also Primordial Qi import 1311 in air-cooled region 131, with iron ore concentrate
Carry out reduction reaction；
(5), CO volume fractions are 60%, H also in Primordial Qi2Volume fraction is 30%；
(6), the effect that also Primordial Qi is heated in uphill process by heat accumulation type radiant tube 21 heats up, the Iron Ore Powder with whereabouts
Exchanged heat and occur reduction reaction, reduction offgas outlet 112 of the reduction tail gas through feed zone 11 discharges reduction reaction device
100；
(7), discharging opening 1321 discharge reduction reaction device of the metallization powder of reaction generation through reduction reaction device 100
100；
(8), the degree of metalization of metallization powder iron is 95%.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " illustrative examples ",
The description of " example ", " specific example " or " some examples " etc. means to combine specific features, the knot that the embodiment or example are described
Structure, material or feature are contained at least one embodiment of the present invention or example.In this manual, to above-mentioned term
Schematic representation is not necessarily referring to identical embodiment or example.Moreover, specific features, structure, material or the spy of description
Point can in an appropriate manner be combined in any one or more embodiments or example.
Although an embodiment of the present invention has been shown and described, it will be understood by those skilled in the art that：Not
In the case of departing from the principle and objective of the present invention a variety of change, modification, replacement and modification can be carried out to these embodiments, this
The scope of invention is limited by claim and its equivalent.
Claims (10)
1. a kind of reduction reaction device for granular material, it is characterised in that including：
Reacting furnace-e/or, the reacting furnace-e/or includes feed zone, reduction section and the cooling section communicated with each other, and the reduction section is located at institute
State the lower section of feed zone and connected with the feed zone, the cooling section connects below the reduction section and with the reduction section
Logical, the top of the feed zone is provided with charging aperture, and the bottom of the cooling section is provided with discharging opening, and the lower section of the feed zone is provided with
Offgas outlet is reduced, provided with also Primordial Qi import on the discharging opening, the charging aperture is connected with the feed zone, described to go back
Former offgas outlet, also Primordial Qi import and the discharging opening are connected with the reduction section；
Heater, the heater is located in the reduction section, and including multiple heat accumulation type radiant tubes, the heat accumulating type spoke
The two ends for penetrating pipe are respectively equipped with burner；
At least one feed nozzle, the feed nozzle is limited vertically at the charging aperture in the feed nozzle
The blanking channel of direction extension and air channel, the feed nozzle are configured to that material injection is entered in the reaction chamber and caused
It is scatter into the material in the reaction chamber on the cross section of reaction chamber.
2. the reduction reaction device according to claim 1 for granular material, it is characterised in that in the feed nozzle
Limit vertically extending and nested blanking channel and air channel successively from inside to outside, the top in the air channel and it is described under
Expect to be respectively equipped with air inlet and blanking import at the top of passage, the bottom of the bottom in the air channel and the blanking channel is set respectively
There are the air outlet connected with the reaction chamber and blanking outlet, the blanking outlet guiding discharging, the air-out straight down
Mouth guiding air-out downwards on the direction of ecto-entad.
3. the reduction reaction device according to claim 2 for granular material, it is characterised in that the air channel has
One of them of relative inner and outer wall in inward-outward direction, the inwall and the outer wall, which are provided with, can descend mobile tune wind
Cone, in the inwall and the outer wall another and described adjust the air outlet that variable area is limited between wind cone.
4. the reduction reaction device according to claim 1 for granular material, it is characterised in that in the feed nozzle
Limit vertically extending and nested the first air channel, blanking channel and the second air channel, described first successively from inside to outside
The first air inlet, blanking import are respectively equipped with the top of the top in air channel, the top of the blanking channel and second air channel
With the second air inlet, the bottom of the bottom in first air channel, the bottom of the blanking channel and second air channel is set respectively
There are the first air outlet connected with the reaction chamber, blanking outlet and the second air outlet, the blanking outlet is led straight down
Material is drawn, first air outlet guiding air-out upwards on direction from inside to outside, second air outlet is led straight down
Draw wind or the guiding air-out downwards on the direction of ecto-entad.
5. the reduction reaction device according to claim 4 for granular material, it is characterised in that the first air channel bag
The first paragraph and second segment connected along the vertical direction is included, the first paragraph is formed as vertically extending column structure, institute
State and gradually increase on direction of the cross-sectional area of second segment from top to bottom, at least a portion of the second segment stretches into described anti-
Answer in chamber and export the lower section with second air outlet positioned at the blanking, first air inlet is located at the first paragraph
Roof on, first air outlet located at the second segment side wall on.
6. the reduction reaction device according to claim 5 for granular material, it is characterised in that first air outlet
Including multiple and circumferentially spaced on the side wall of the second segment.
7. the reduction reaction device according to claim 4 for granular material, it is characterised in that first air outlet
Center line and vertical direction between angle α scope be 2 °~10 °.
8. the reduction reaction device for granular material according to any one of claim 4-7, it is characterised in that described
Second air channel has in interior foreign side relative inner and outer wall upwards, and be provided with can for one of them of the inwall and the outer wall
Another in lower mobile tune wind cone, the inwall and the outer wall limits variable area between the tune wind cone
Second air outlet.
9. the reduction reaction device according to claim 1 for granular material, it is characterised in that the reduction tail gas goes out
Mouth is on the side wall of the feed zone.
10. the reduction reaction device according to claim 9 for granular material, it is characterised in that the cooling section bag
Include air-cooled region and below the air-cooled region and with the water cooling region of the air-cooled regional connectivity, the also Primordial Qi import
On the side wall in the air-cooled region.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710613084.XA CN107227388A (en) | 2017-07-25 | 2017-07-25 | Reduction reaction device for granular material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710613084.XA CN107227388A (en) | 2017-07-25 | 2017-07-25 | Reduction reaction device for granular material |
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| Publication Number | Publication Date |
|---|---|
| CN107227388A true CN107227388A (en) | 2017-10-03 |
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ID=59957129
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115950244A (en) * | 2022-12-26 | 2023-04-11 | 广东微容电子科技有限公司 | Solid phase reaction device |
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2017
- 2017-07-25 CN CN201710613084.XA patent/CN107227388A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115950244A (en) * | 2022-12-26 | 2023-04-11 | 广东微容电子科技有限公司 | Solid phase reaction device |
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