CN107208977A - Sintered ore manufacturing equipment and manufacture method - Google Patents

Sintered ore manufacturing equipment and manufacture method Download PDF

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Publication number
CN107208977A
CN107208977A CN201580074900.3A CN201580074900A CN107208977A CN 107208977 A CN107208977 A CN 107208977A CN 201580074900 A CN201580074900 A CN 201580074900A CN 107208977 A CN107208977 A CN 107208977A
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CN
China
Prior art keywords
pallet
microwave
mixed material
ore
sintered ore
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201580074900.3A
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Chinese (zh)
Inventor
朴锺力
梁永哲
郭城大
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Posco Holdings Inc
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Posco Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Posco Co Ltd filed Critical Posco Co Ltd
Publication of CN107208977A publication Critical patent/CN107208977A/en
Pending legal-status Critical Current

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27FURNACES; KILNS; OVENS; RETORTS
    • F27BFURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B21/00Open or uncovered sintering apparatus; Other heat-treatment apparatus of like construction
    • F27B21/06Endless-strand sintering machines
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27FURNACES; KILNS; OVENS; RETORTS
    • F27DDETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D11/00Arrangement of elements for electric heating in or on furnaces
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27FURNACES; KILNS; OVENS; RETORTS
    • F27DDETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D15/00Handling or treating discharged material; Supports or receiving chambers therefor
    • F27D15/02Cooling
    • F27D15/0206Cooling with means to convey the charge
    • F27D15/0273Cooling with means to convey the charge on a rotary hearth

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Furnace Details (AREA)

Abstract

According to the sintered ore manufacturing equipment of one embodiment of the invention by the way that many pallets are performed into sintering process with caterpillar band type connection, and sintered ore manufacturing equipment includes:Material feeding portion, the material feeding portion includes supplying top ore and the top ore hopper and surge hopper of mixing material to pallet respectively;Ignition furnace, direction of advance of the ignition furnace along pallet is arranged in the rear end of material supply part, to light the top layer for the mixed material being loaded in pallet, and microwave oven, the microwave oven is arranged in the rear end of ignition furnace, to launch microwave to the surface part for the mixing material being loaded in pallet.

Description

Sintered ore manufacturing equipment and manufacture method
Technical field
The present invention relates to the apparatus and method for manufacturing sintered ore, more particularly, to for by sintering platform It is as few as possible that what the top irradiation microwave and making of car was produced on the upside of pallet return mine (return fines), so as to increase The particle size of big sintered ore, and increase the rate of recovery of sintered ore, and then propose large-duty sintered ore manufacture and set Standby and method.
Background technology
About the 80% of primary raw material is accounted for generally, as the sintered ore that raw material is used in blast furnace, and is sintered Ore by mixed material and top ore by loading to agglomerating plant and roasting mixed material and top ore at high temperature Burn to manufacture.
Fig. 1 is the signal for showing the sintering process using general downward drawing-in type sintering machine (Dwight Lloyd) Figure.Fig. 2 is the view of the rate of recovery for the position for showing the pallet according to conventional general Dwight Lloyd sintering machines.
As shown in Figures 1 and 2, in the sintering process using general Dwight Lloyd sintering machines, by thin iron Ore, supplement raw material and after coke is stored in ore bin 10, these materials are discharged with scheduled volume, will addition moisture and with Material mixing in drum mixer 11, mixing material is stored in surge hopper (surge hopper) 12.
Thereafter, when pallet 15 (top ore is loaded to the pallet 15 by top ore hopper 14) is mobile When, mixed material is given by the way that moisture is added to by the surge hopper 12 positioned at the rear of top ore hopper 14, via drum-type The raw material that material machine 13 is discharged is provided, and above-mentioned offer mixed material along for causing classification phenomenon (classifying Phenomenon deflecting plates 16) is loaded to the top of pallet 15.
By this way, the pallet 15 of mixed material is mounted with completely in ignition furnace 17 by high temperature (about 1200 DEG C) Spark lights the top layer of mixed material, and main air blower 18 runs to produce suction.
The suction is transferred to bellows 20 by room 19.Sintered ore is by using the suction strength for being transferred to bellows 20 Aspirate the bottom of pallet 15, the mixed material top biography so as to allow the air in environment from loading to pallet 15 in ground The densification of powder iron ore is manufactured to bottom and simultaneously by high-temperature roasting.
Meanwhile, a kind of method for manufacturing sintered ore is employed, wherein, sintered ore good quality, fuel consumption Minimize, and the rate of recovery and productivity ratio are maximized.In above-mentioned Dwight Lloyd sintering machines, because burning gases are by from burning Knot chassis 15 bottom persistently aspirate, cold air to upper strata (be formed as from mixed material plane to pallet 15 whole depth 1/3 depth of degree) rapid cooling.Therefore, because (it occupies manufactured sintering to the sintered ore positioned at the upper strata of pallet 15 The three of ore/enough heats needed for sintering mono-) can not be received, so that a large amount of diameters returning mine less than 5mm is generated, And thus reduce the rate of recovery of sintered ore.
The technical examples solved the above problems using microwave include a kind of " method (a for being used to manufacture sintered ore Method for manufacturing sintered ores) (Korean Patent Application Publication 10-1995-0018555 Number) ", it is " a kind of to be used to manufacture method (a method for manufacturing sintered ores) (day of sintered ore Present patent application discloses No. 1996-014763) ", " it is a kind of be used to remove in the mixed material of sintered ore the method for moisture and Equipment (an apparatus and method for removing moisture of mixed raw materials of Sintered ores) (Korean Patent Application Publication 10-2010-0026457) " etc..
However, all prior arts both correspond to following methods:Wherein, load to pallet in raw material and Before top layer is ignited, raw material is heated to dry moisture using microwave, particle (pseudo- is intended to improve Particle intensity), or raw material is preheated to reduce energy expenditure.Conventionally, as pallet Upper strata be rapidly cooled, due to the sintered ore particle on upper strata size reduce and obtain it is substantial amounts of return mine so that The problem of rate of recovery of sintered ore reduces does not solve.
The content of the invention
Technical problem
The design present invention is used to manufacture sintering deposit to solve the above problems it is an aspect of the invention to provide a kind of The apparatus and method of stone, wherein, when mixed material is loaded to pallet and passes through ignition furnace, pass through what is be ignited to top layer The flat surfaces irradiation microwave of mixed material, is made by un-sintered ore by supplying the heat lacked to the upper strata of pallet The caused generation returned mine is minimized, so as to improve the quality and the rate of recovery of sintered ore.
Technical scheme
A kind of equipment for manufacturing sintered ore, wherein, it is connected to each other in multiple pallets on unlimited track In the case of perform sintering process, according to embodiment of the present invention, the equipment may include:Raw material feed unit, it includes difference Top ore and the top ore hopper and surge hopper of mixed material are supplied to pallet;Ignition furnace, ignition furnace is along burning The direction of advance of knot chassis is arranged in the rear end of raw material feed unit, is loaded with lighting to the table of the mixed material of pallet Layer;And microwave oven, microwave oven is arranged in the rear end of ignition furnace, with the mixed material to loading to pallet Top layer irradiates microwave.
Microwave oven can irradiate the microwave that frequency is 800MHz to 3GHz.
Microwave oven could be arranged to tunnel-shaped, and two end is open in the direction of advance of pallet, with When pallet passes through microwave oven to the surface irradiation microwave for the mixed material being contained in pallet.
Can according to the method that a kind of use Dwight Lloyd sintering machines of embodiment of the present invention manufacture sintered ore With including:To the pallet supply top ore and the raw material supplying step of mixed material moved on unlimited track;Light Load to the top layer of the mixed material of pallet and light step;And pass through the plane for the mixed material being ignited to top layer The heating stepses for irradiating microwave and being heated to the upper strata of mixed material.
In heating stepses, the microwave that frequency is 800MHz to 3GHz can be irradiated.
In heating stepses, microwave can be irradiated and continue ten seconds to three minutes.
Advantageous effects
According to embodiment of the present invention, in the case of the flowing of burning gases is not influenceed, heated using microwave Stove supplies required heat energy on the upper strata of the mixed material to loading to pallet so that can improve the quality of sintered ore And the rate of recovery.
Brief description of the drawings
Fig. 1 is to show the sintering process schematic diagram using general Dwight Lloyd sintering machines;
Fig. 2 is the recovery of the position for the pallet for showing the general Dwight Lloyd sintering machines according to prior art The view of rate;
Fig. 3 is to show the schematic diagram for being used to manufacture the equipment of sintered ore according to one embodiment of the invention;
Fig. 4 is the schematic diagram for showing the microwave oven according to embodiment of the present invention;
Fig. 5 is to show the flow chart for being used to manufacture the method for sintered ore according to embodiment of the present invention;And
Fig. 6 A and 6B be show according to the Temperature Distributions of the general Dwight Lloyd sintering machines of correlation technique and according to The figure of the Temperature Distribution of the sintered ore manufacturing equipment of embodiment of the present invention.
Embodiment
Although below by reference to accompanying drawing to the present invention exemplary be described in detail, the present invention not by The restriction or limitation of embodiment.In this manual, for reference, identical reference substantially refers to identical respectively Element.Under such regulation, the content described in other accompanying drawings may be cited, and to those skilled in the art The content perhaps repeated in obvious can be omitted.
Fig. 3 is to show the schematic diagram for being used to manufacture the equipment of sintered ore according to one embodiment of the invention, And Fig. 4 is the figure for showing the microwave oven according to embodiment of the present invention.
As shown in Figures 3 and 4, according to the equipment bag for being used to manufacture sintered ore of one embodiment of the invention Include:Raw material feed unit, ignition furnace 17 and microwave oven 30, the raw material feed unit on unlimited track each other The inside base feed of multiple pallets 15 of connection, the ignition furnace 17, which is lighted, to be loaded to the raw material of each pallet 15 Top layer, the surface irradiation microwave of raw material of the microwave oven 30 to loading to pallet 15.
Supplying to the raw material of each pallet 15 includes top ore and the mixed material being deposited on the ore of top, former Material feed unit includes top ore hopper 14 and is arranged on the surge hopper 12 at the rear of top ore hopper 14, the top ore deposit Building stones bucket 14 be arranged on pallet 15 width on path side top (pallet 15 along the path, It is mobile along the traveling rail (driving rail) in unlimited orbital fashion).
Top ore hopper 14 fills the top ore of the particle size range with 10mm to 15mm with about 50mm thickness It is loaded onto pallet 15, and the surge hopper 12 installed in top ore hopper rear is supplied to pallet 15 and wherein added The mixed material of scheduled volume moisture.
Herein, when the rotation of drum feeder 13 installed in the bottom of surge hopper 12, surge hopper 12 will be received in Mixed material in surge hopper 12 is discharged to the inside of pallet 15, and according to the rotary speed of drum feeder 13 come The discharge rate of mixed material is adjusted, and the lower section of drum feeder 13 is provided with for causing dividing for discharged mixed material The deflecting plates 16 of class phenomenon so that the mixed material discharged by surge hopper 12 is loaded to pallet 15 along deflecting plates 16 Inside.
The top that multiple burners are arranged on ignition furnace 17 is pre- to be spaced apart from each other on the width of pallet 15 Fixed interval, so as to sequentially light the top layer of the mixed material for the multiple pallets 15 being loaded on the downside of by burner.
The basal surface of microwave oven 30 and opposite two ends have open tunnel-shaped so that multiple pallets 15 It can sequentially pass through, and microwave oscillation device is installed on the top plate of microwave oven 30, with to being loaded to by micro- The top layer irradiation microwave of the mixed material of the pallet 15 of the downside of Wave heating stove 30.
Usually, microwave corresponds to a kind of form of energy of low frequency in electromagnetic energy, with 800MHz to 300000MHz's Frequency range, only results in molecule and is rotated in the range of electromagnetic field without influenceing the structure of molecule.
In more detail, microwave is made up of electric field and magnetic field.Wherein, electric field is used as heating material and with light velocity propagation.In addition, The energy (80 to 120 kcal/mol) of molecular linkage can be disconnected because (0.037 kcal/mol) of the energy of photon is less than, because This electric field only heating material without influence molecule structure.
Therefore, internal temperature can rapidly and evenly be heated according to the irradiation of the microwave oven 30 of embodiment of the present invention The microwave of degree and external temperature, instead of conventional general heat protocol, and heat transfer is used in conventional general heat protocol And therefore energy transfer rate is low, material reaches that thermal balance spent time is long, and efficiency is low.
It is preferred here that the frequency range of used microwave is 800MHz to 3GHz.This is due to the frequency when microwave When rate is more than 3GHz, cost increase, sintering temperature exceedingly increases, and the quality decline of therefore manufactured sintered ore, And when the frequency of microwave is less than 800MHz, increase with the depth of microwave penetration mixed material, energy density reduction, and Therefore the upper strata that the generations particle size of mixed material is returned mine less than 5mm is not sufficiently heated, and thus extend heating Spent time.
[table 1]
Classification Chemical composition Temperature (DEG C)
Bloodstone Fe2O3 1000
Magnetic iron ore Fe3O4 700
Limonite mFe2·nH2O 150
Lime stone CaCO3 200
Silica SiO2 140
Table 1 is to represent to irradiate capacity 2kW, frequency to the general main component being usually loaded with to the mixed material of pallet The form of rate 2.4GHz microwave temperature measured after 1 minute.
As shown in table 1, when mixed material is heated using microwave, the main component of mixed material can in a short time by Heating.Therefore, when microwave irradiation is to when loading to the surface of the mixed material of pallet 15, from mixed material plane to sintering The entire depth of chassis 15 1/3 depth formation upper strata be heated so that compensate for due to burning gases from sintering platform The temperature that the downside of car 15 is constantly aspirated and cooled down by cold air, returning mine for making to produce on upper strata is minimized.
Meantime, it is preferable that being had according to the microwave oven 30 of embodiment of the present invention makes each pallet 15 The length for passing through microwave oven 30 for 1 minute to 2 minutes can be used.
This is due to when the length of microwave oven 30 is formed so that the transit time of pallet 15 is no more than 1 minute When, load to the upper strata of the mixed material of pallet 15 and be not sufficiently heated so that produced quantity of return mines increase.And When length is formed so that heating carries out 2 minutes or be longer, compared with the increase of manufacturing cost, produced quantity of return mines Reduction is small.It is preferred, therefore, that the length of microwave oven 30 is formed so that the transit time of pallet 15 is 1 minute to 2 minutes.
[table 2]
Microwave (2kW, 2.4GHz) exposure time Return mine generation ratio
- 33.2%
1 minute 25.8%
2 minutes 19.8%
Table 2 is related to table of the performance according to the generation ratio of returning mine of microwave radiation condition.In the present invention, 120kg mixing The surface of raw material is used after flame ignition, and upper strata is heated by irradiating microwave (2kW and 2.4GHz).Next, burning gases exist Suctioned out from below under 1600mmHq pressure, after burning is terminated completely, sample is crushed to 50mm or smaller size, The amount returned mine that produced size is less than 5mm is measured after being measured to drum strength.
As shown in table 2, compared with the conventional Dwight Lloyd sintering machines for not irradiating microwave, when irradiation microwave one minute When, produced quantity of return mines reduces about 7.4%, and when irradiating microwave two minutes, produced quantity of return mines is reduced 13.4%, thus may determine that, the quantity of return mines produced during sintering can be significantly decreased.
[table 3]
Microwave (5kW, 2.4GHz) exposure time Return mine generation ratio
- 33.2%
10 seconds 30.7%
30 seconds 24.4%
60 seconds 18.5%
Table 3 is represented when microwave power increases to 5kW according to the table of the generation ratio of returning mine of exposure time.It can determine , compared with the 2kW in table 2, generation ratio of returning mine reduces rapidly in a short time.
Therefore, from the measurement result in table 2 and table 3 it is ensured that when the power increase of microwave, the microwave time can To significantly reduce.
Below with reference to accompanying drawings to using the above-mentioned construction for being used to manufacture sintered ore according to embodiment of the present invention Equipment is described to manufacture the method for sintered ore.
Fig. 5 is the flow chart for being used to manufacture the method for sintered ore according to embodiment of the present invention.
As shown in Figure 5, included according to the method for the manufacture sintered ore of embodiment of the present invention:Raw material supply step Suddenly the heating stepses lighted step and microwave is irradiated to mixed material top layer on the surface of mixed material, are lighted.
It is using top ore hopper 14 and surge hopper 12 that top ore and mixed material is suitable in raw material supplying step Supply to sequence to the pallet 15 moved on unlimited track.
In the case where raw material is supplied to pallet 15 completely, ignition furnace 17 is passed through in the pallet 15 equipped with raw material When, light the top layer for the mixed material being contained in pallet 15.
Fig. 6 is the Temperature Distribution (a) and the reality according to the present invention for showing conventional general Dwight Lloyd sintering machines Apply the figure for being used to manufacture the Temperature Distribution (b) of the equipment of sintered ore of scheme.
As shown in Figure 6, it is used to manufacturing the method for sintered ore according to embodiment of the present invention, when top layer quilt When lighting completely, in heating stepses, by being to the top layer irradiation frequency loaded to the mixed material of pallet 15 800MHz to 3GHz microwave and the upper strata of mixed material is heated 1 minute to 2 minutes.
Therefore, thereafter, the temperature on the upper strata for the mixed material persistently aspirated and cooled down from below due to burning gases can To be compensated, thus required heat energy is supplied to the upper strata for the mixed material for being loaded into pallet 15 so that can improve burning Tie the quality and the rate of recovery of ore.
Further, since being heated using microwave, the flowing of burning gases is had no effect on so that manufactured sintered ore Greater homogeneity, and the productivity ratio of manufactured sintered ore can be improved.
As above, when the upper strata of mixed material is completely warmed, main air blower 18 operates to produce in the downside of pallet 15 Raw suction so that manufacture sintered ore when burning gases are sucked.
Although as described above, being described with reference to exemplary of the invention, those skilled in the art It is understood that without departing from the spirit and scope of the present invention, various modifications being carried out to the present invention and are changed Become, these modifications and changes are described in the following claims.
Description of reference numerals
10:Ore bin 11:Drum mixer
12:Surge hopper 13:Drum feeder
14:Top ore hopper 15:Pallet
16:Deflecting plates 17:Ignition furnace
18:Main air blower 19:Room
20:Bellows 30:Microwave oven

Claims (6)

1. a kind of equipment for manufacturing sintered ore, wherein, in many pallets in the feelings being connected to each other on unlimited track Sintering process is performed under condition, the equipment includes:
Raw material feed unit, the raw material feed unit includes supplying top ore and mixed material to the pallet respectively Top ore hopper and surge hopper;
Ignition furnace, direction of advance of the ignition furnace along the pallet is arranged in the rear end of the raw material feed unit, with Light and load to the top layer of the mixed material of the pallet;And
Microwave oven, the microwave oven is arranged in the rear end of the ignition furnace, with to loading to the pallet The top layer irradiation microwave of the mixed material.
2. equipment according to claim 1, wherein, the microwave that the microwave oven irradiation frequency is 800MHz to 3GHz.
3. equipment according to claim 1, wherein, the microwave oven is set to tunnel-shaped, and two end is in institute State in the direction of advance of pallet it is open, with when the pallet passes through the microwave oven to being contained in the burning Tie the surface irradiation microwave of the mixed material in chassis.
4. a kind of method that use Dwight Lloyd sintering machines manufacture sintered ore, methods described includes:
To the pallet supply top ore and the raw material supplying step of mixed material moved on unlimited track;
Light to load to the top layer of the mixed material of the pallet and light step;And
The upper strata of the mixed material is carried out by irradiating microwave to the plane on the top layer being ignited of the mixed material The heating stepses of heating.
5. method according to claim 4, wherein in the heating stepses, irradiation frequency is micro- for 800MHz's to 3GHz Ripple.
6. method according to claim 5, wherein in the heating stepses, irradiating the microwave and continuing ten seconds to three points Clock.
CN201580074900.3A 2015-10-05 2015-12-22 Sintered ore manufacturing equipment and manufacture method Pending CN107208977A (en)

Applications Claiming Priority (3)

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KR1020150139586A KR20170040826A (en) 2015-10-05 2015-10-05 Apparatus and method for manufacturing sintered ore
KR10-2015-0139586 2015-10-05
PCT/KR2015/014119 WO2017061664A1 (en) 2015-10-05 2015-12-22 Sintered ore manufacturing apparatus and manufacturing method

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JP (1) JP2018505965A (en)
KR (1) KR20170040826A (en)
CN (1) CN107208977A (en)
AT (1) AT518585A2 (en)
DE (1) DE112015005874T5 (en)
WO (1) WO2017061664A1 (en)

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CN110699542A (en) * 2019-10-22 2020-01-17 安徽省东岷恒大冶金科技有限公司 Process method and device for upgrading and modifying sintered surface layer ore
CN112410544A (en) * 2020-01-19 2021-02-26 中冶长天国际工程有限责任公司 Double-layer sintering method and sintering device
CN113483554A (en) * 2021-05-14 2021-10-08 中冶长天国际工程有限责任公司 Drying device and drying method for lump ore for blast furnace concentrate
CN113503722A (en) * 2021-05-14 2021-10-15 中冶长天国际工程有限责任公司 Drying device and drying method for multi-heat-source coupled heating lump ore

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CN110273065B (en) * 2018-03-14 2021-05-14 宝山钢铁股份有限公司 Iron ore microwave sintering method

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CN110699542A (en) * 2019-10-22 2020-01-17 安徽省东岷恒大冶金科技有限公司 Process method and device for upgrading and modifying sintered surface layer ore
CN112410544A (en) * 2020-01-19 2021-02-26 中冶长天国际工程有限责任公司 Double-layer sintering method and sintering device
CN113483554A (en) * 2021-05-14 2021-10-08 中冶长天国际工程有限责任公司 Drying device and drying method for lump ore for blast furnace concentrate
CN113503722A (en) * 2021-05-14 2021-10-15 中冶长天国际工程有限责任公司 Drying device and drying method for multi-heat-source coupled heating lump ore
CN113483554B (en) * 2021-05-14 2022-06-07 中冶长天国际工程有限责任公司 Drying device and drying method for lump ore for blast furnace concentrate

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WO2017061664A1 (en) 2017-04-13
AT518585A2 (en) 2017-11-15
JP2018505965A (en) 2018-03-01
KR20170040826A (en) 2017-04-14

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