WO2017061664A1 - 소결광 제조장치 및 제조방법 - Google Patents
소결광 제조장치 및 제조방법 Download PDFInfo
- Publication number
- WO2017061664A1 WO2017061664A1 PCT/KR2015/014119 KR2015014119W WO2017061664A1 WO 2017061664 A1 WO2017061664 A1 WO 2017061664A1 KR 2015014119 W KR2015014119 W KR 2015014119W WO 2017061664 A1 WO2017061664 A1 WO 2017061664A1
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- WO
- WIPO (PCT)
- Prior art keywords
- sintered
- raw material
- sintering
- sintered ore
- blended
- 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.)
- Ceased
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B21/00—Open or uncovered sintering apparatus; Other heat-treatment apparatus of like construction
- F27B21/06—Endless-strand sintering machines
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D11/00—Arrangement of elements for electric heating in or on furnaces
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D15/00—Handling or treating discharged material; Supports or receiving chambers therefor
- F27D15/02—Cooling
- F27D15/0206—Cooling with means to convey the charge
- F27D15/0273—Cooling with means to convey the charge on a rotary hearth
Definitions
- the present invention relates to a sintered ore manufacturing apparatus and a manufacturing method, and more particularly, by minimizing the half-light generation of the upper layer of the sintered trolley by irradiating microwaves on the top of the sintered bogie, to improve the particle size of the sintered ore and increase the sintered ore recovery productivity It relates to a sintered ore manufacturing apparatus and a manufacturing method that can be improved.
- the sintered ore used as a raw material in the blast furnace accounts for about 80% of the main raw material, the sintered ore is prepared by charging the raw material and the top light in the sintering apparatus and firing at high temperature.
- FIG. 1 is a schematic view showing a sintering process using a general down suction sintering apparatus
- FIG. 2 is a view showing a recovery rate by sintering cart position of a conventional general down suction sintering apparatus.
- the sintering process using a downward suction sintering apparatus is stored in the ore bin (ORE BIN) 10, and the iron ore, secondary raw materials, coke (Coke), and then cut out a certain amount of the drum mixer ( Water is added and mixed in the DRUM MIXER; 11) and stored in the SURGE HOPPER 12.
- a compounding raw material is prepared by adding, and the compounding raw material prepared as described above is charged to the upper portion of the sintering cart 15 along the inclined plate (Deflector Plate) 16 to induce a classification phenomenon.
- bogie 15 in which the compounding material loading was completed ignites the compounding material superficial layer part with the flame
- the suction force is transmitted to the windbox 20 through the chamber 19, and the suction force transmitted to the windbox 20 strongly sucks the lower portion of the sintering cart 15 so that air in the air is charged into the sintering cart 15. Passing from the upper part to the lower part of the blended raw material, the iron ore is agglomerated by high temperature firing to produce a sintered ore.
- the sintered ore manufacturing process adopts a method of maximizing the quality of the sintered ore and maximizing recovery and productivity while minimizing fuel consumption.
- the downward suction type sintering apparatus continuously burns the combustion gas under the sintering cart 15. As the air is sucked, the cool air rapidly cools the upper layer formed from the plane of the blended material to one third depth with respect to the entire depth of the sintered bogie 15, so that the upper tier of the sintered bogie 15 occupies about one third of the manufactured sintered ore.
- the sintered ore does not receive enough heat for sintering, a large amount of semi-glossy particles having a diameter of less than 5 mm is generated, which has a problem in that the recovery rate of the sintered ore is lowered.
- the present invention has been made to solve the above problems, it is charged into the sinter bogie and passed through the ignition furnace while irradiating microwaves to the plane of the compounding material complexed with the surface layer is supplied by supplying a heat source insufficient in the upper sinter bogie sintered condensation
- a sintered ore manufacturing apparatus and a manufacturing method that can improve the quality and recovery of the sintered ore by minimizing the generation of semi-glow.
- the sintered ore manufacturing apparatus in the sintered ore manufacturing apparatus that proceeds the sintering process by connecting a plurality of sintered trolley in an endless track, an upper light hopper for supplying the upper light and the blended raw materials to the sintered trolley respectively Raw material supply including a surge hopper; An ignition furnace disposed at a rear end of the raw material supply part in the advancing direction of the sintered bogie to complex the surface layer portion of the blended raw material charged into the sintered bogie; And a microwave heating furnace disposed at a rear end of the ignition furnace and irradiating microwaves to the surface layer portion of the blended raw material charged into the sintering cart.
- the microwave heating furnace may be characterized in that for irradiating the microwave with a frequency of 800MHz ⁇ 3kHz.
- the microwave heating furnace is preferably formed in a tunnel shape in which both ends are opened in the advancing direction of the sintering bogie so that the microwaves can be irradiated onto the surface of the blended material accommodated therein while the sintering bogie passes.
- the microwave is preferably irradiated with a frequency of 800MHz ⁇ 3kHz.
- the heating step may be characterized in that for irradiating the microwave for 10 seconds to 3 minutes.
- the sintered ore quality and recovery rate can be improved It works.
- FIG. 1 is a schematic view showing a sintering process using a conventional double-low suction sintering apparatus
- Figure 2 is a view showing the recovery rate for each position of the sintered cart of the conventional general down suction sintering apparatus
- FIG. 3 is a schematic view showing a sintered ore manufacturing apparatus according to an embodiment of the present invention.
- FIG. 4 is a view for explaining a microwave heating furnace, according to an embodiment of the present invention.
- FIG. 5 is a flowchart showing a sintered ore manufacturing method according to an embodiment of the present invention
- FIG. 6 is a view showing a temperature distribution of a conventional general down suction sintering apparatus and a sintered ore manufacturing apparatus according to an embodiment of the present invention.
- FIG 3 is a schematic view showing a sintered ore manufacturing apparatus according to an embodiment of the present invention
- Figure 4 is a view for explaining a microwave heating furnace, according to an embodiment of the present invention.
- the sintered ore manufacturing apparatus is a raw material supply unit for supplying the raw material into the sintered trolley 15 is connected to a plurality of tracks in the orbit and each of the sintered trolley 15 And an ignition furnace 17 for igniting the surface layer portion of the raw material charged in the) and a microwave heating furnace 30 for irradiating the microwaves to the surface of the raw material charged in the sintering cart 15.
- the raw material supplied into each of the sintered trolleys 15 is composed of a compound raw material stacked on top of the upper light and the upper light, and the raw material supply part is an upper portion of one side of the path along which the sintered trolley 15 moves along the running rail formed in an endless track.
- positioned at the rear end of the upper light hopper 14 are comprised.
- the upper light hopper 14 charges the upper light having a particle size range of 10 to 15 mm in the sintering cart 15 to the sintering cart 15 with a thickness of about 50 mm, and the surge hopper 12 installed at the rear end has a predetermined amount of moisture.
- the added blending raw material is supplied to the sintering cart 15.
- the surge hopper 12 is rotated the drum feeder 13 installed in the lower portion of the blended raw material contained in the surge hopper 12 is discharged into the sintering cart 15 and blended according to the rotational speed of the drum feeder 13
- the discharge amount of the raw material is controlled, and a lower plate (Deflector Plate, 16) is installed at the lower part to induce the classification phenomenon of the mixed raw material is discharged from the surge hopper 12 along the inclined plate (16) It is charged into the sinter cart 15.
- the ignition furnace 17 is provided with a plurality of burners spaced apart at regular intervals in the width direction of the sintering bogie 15 so as to ignite the surface layer portion of the blended material charged into the sinter bogie 15, and continuously The surface layer portions of the blended raw materials charged into the sintered trolleys 15 to be passed are sequentially fired.
- the microwave heating furnace 30 is formed in a tunnel shape in which its bottom and both ends are open so that a plurality of sintering trolleys 15 can be continuously passed, and the raw material charged in the sintering trolley 15 passed below.
- Microwave oscillation means is installed on the ceiling to irradiate the microwaves to the surface layer.
- microwaves are a form of energy with a low frequency of electromagnetic energy and have a frequency range of 800 to 300,000 MHz, causing only the rotation of molecules within the electromagnetic field range and do not affect the molecular structure.
- the microwave is composed of an electric field and a magnetic field, of which the electric field serves to heat the material, propagates at the speed of light and the photon energy (0.037kcal / mole) is the energy (80 ⁇ 120kcal / It is lower than mole, so it only heats the material and does not affect the molecular structure.
- the microwave heating furnace 30 replaces the conventional inefficient conventional heating method by using energy conduction heat, which is slow in energy transfer rate and takes a long time until thermal equilibrium of materials, thereby uniformizing internal and external temperatures. Investigate microwaves that can be heated quickly.
- the frequency of the microwave used is preferably 800MHz ⁇ 3kHz, the reason is that when the frequency of the microwave exceeds 3kHz the cost is increased and the sintering temperature is excessively raised to improve the quality of the sintered ore produced If it is less than 800MHz, the depth penetrated into the blending material is increased, and the energy density decreases, so that the upper part of the blending material having semi-gloss with a particle size of less than 5 mm is not sufficiently heated, and heating takes a long time. to be.
- Table 1 is a table showing the temperature measured after 1 minute irradiation of microwave of 2 kW capacity, 2.4 kW for 1 minute with respect to the main components of the blended raw materials charged in the sintering cart.
- the microwave heating furnace 30 is preferably formed to a length that each sintering cart 15 can pass for 1 to 2 minutes.
- the length of the microwave heating furnace 30 is preferably formed such that the sintering cart 15 has a passage time of 1 to 2 minutes.
- Table 2 is a table showing the rate of semi-glow generation according to the microwave irradiation conditions, in the present invention, after the surface of the 120kg blended material is ignited using a flame and irradiated with microwaves (2kW, 2.4GHz) to heat the upper layer, The combustion gas was aspirated at a pressure of 1,600 mmHq from below, and after combustion was completed, the sample was crushed to 50 mm or less, and the drum strength was measured.
- Microwave (5kW, 2.4GHz) irradiation time Half light generation rate - 33.2% 10 sec 30.7% 30 seconds 24.4% 60 seconds 18.5%
- Table 3 is a table showing the half light generation ratio according to the irradiation time when the microwave power is increased to 5 kW, it can be seen that the half light generation ratio decreases rapidly in a short time compared to 2 kW of Table 2.
- FIG. 5 is a flowchart showing a sintered ore manufacturing method according to an embodiment of the present invention.
- the sintered ore manufacturing method includes a raw material supplying step, an ignition step of complexing the surface of the blended raw material, and a heating step of irradiating microwaves to the surface layer of the blended raw material.
- the upper light hopper 14 and the surge hopper 12 are sequentially supplied to the inside of the sintered trolley 15 which is moved on the track.
- the sintered trolley 15 loaded with the raw materials passes through the ignition furnace 17 to ignite the surface layer portion of the blended raw material contained therein.
- FIG. 6 is a view showing the temperature distribution (a) of the conventional general down suction sintering apparatus and the temperature distribution (b) of the sintered ore manufacturing apparatus according to an embodiment of the present invention.
- the microwave is 800MHz ⁇ 3 kHz at the surface layer portion of the blended raw material charged in the sintered cart 15 in the heating step Irradiate for 1 to 2 minutes to heat the upper layer of the blended raw material.
- the cooling temperature can be compensated by continuously inhaling the combustion gas from below to compensate for the cooling temperature of the upper part of the blended raw material, thereby supplying the heat energy necessary for the upper part of the blended raw material charged in the sintered bogie 15, thereby improving the sintered ore quality and recovery rate. There is an effect to improve.
- heating by using a microwave does not affect the flow of the combustion gas has the effect of making the quality of the sintered ore produced uniformly, improving the productivity.
- the main blower 18 is operated to generate a suction force under the sinter truck 15 to produce a sintered ore while sucking the combustion gas.
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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
Description
| 구분 | 화학조성 | 온도(℃) |
| 적철석(Hematite) | Fe2O3 | 1,000 |
| 자철석(Magnetite) | Fe3O4 | 700 |
| 갈철광(Limonite) | mFe2·nH2O | 150 |
| 석회암(Limestone) | CaCO3 | 200 |
| 실리카(Silica) | SiO2 | 140 |
| 마이크로웨이브(2kW, 2.4㎓) 조사시간 | 반광 발생비 |
| - | 33.2% |
| 1분 | 25.8% |
| 2분 | 19.8% |
| 마이크로웨이브(5kW, 2.4㎓) 조사시간 | 반광 발생비 |
| - | 33.2% |
| 10초 | 30.7% |
| 30초 | 24.4% |
| 60초 | 18.5% |
Claims (6)
- 무한궤도상으로 다수의 소결대차를 연결하여 소결공정을 진행하는 소결광 제조장치에 있어서,상기 소결대차에 상부광 및 배합원료를 각각 공급하는 상부광 호퍼와 써지 호퍼를 포함하는 원료 공급부;상기 소결대차의 진행방향으로 상기 원료 공급부 후단에 배치되어 상기 소결대차에 장입된 배합원료의 표층부를 착화시키는 점화로; 및상기 점화로의 후단에 배치되어 상기 소결대차에 장입된 배합원료의 표층부에 마이크로웨이브를 조사하는 마이크로웨이브 가열로;를 포함하는, 소결광 제조장치.
- 청구항 1에 있어서,상기 마이크로웨이브 가열로는,주파수가 800㎒ ~ 3㎓인 마이크로웨이브를 조사하는 것을 특징으로 하는, 소결광 제조장치.
- 청구항 1에 있어서,상기 마이크로웨이브 가열로는,상기 소결대차가 통과되면서 그 내부에 수용된 배합원료의 표면에 마이크로웨이브를 조사할 수 있도록, 상기 소결대차의 진행방향으로 양단이 개구된 터널형상으로 형성된 것을 특징으로 하는, 소결광 제조장치.
- 하방 흡입식(Dwight Loyd) 소결장치를 이용한 소결광 제조방법에 있어서,무한궤도상에서 이동되는 소결대차에 상부광 및 배합원료를 공급하는 원료공급 단계;상기 소결대차에 장입된 배합원료의 표층부를 착화시키는 점화 단계; 및표층부가 점화된 배합원료의 평면에 마이크로웨이브를 조사하여 배합원료의 상층부를 가열시키는 가열 단계;를 포함하는, 소결광 제조방법.
- 청구항 4에 있어서,상기 가열 단계는,주파수가 800㎒ ~ 3㎓인 마이크로웨이브를 조사하는 것을 특징으로 하는, 소결광 제조방법.
- 청구항 5에 있어서,상기 가열 단계는,마이크로웨이브를 10초 ~ 3분간 조사하는 것을 특징으로 하는, 소결광 제조방법.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201580074900.3A CN107208977A (zh) | 2015-10-05 | 2015-12-22 | 烧结矿石制造设备和制造方法 |
| DE112015005874.5T DE112015005874T5 (de) | 2015-10-05 | 2015-12-22 | Sintererzherstellungsvorrichtung und -herstellungsverfahren |
| JP2017536837A JP2018505965A (ja) | 2015-10-05 | 2015-12-22 | 焼結鉱製造装置及び製造方法 |
| ATA9484/2015A AT518585A2 (de) | 2015-10-05 | 2015-12-22 | Herstellungsapparat und Herstellungsverfahren für gesintertes Erz |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-2015-0139586 | 2015-10-05 | ||
| KR1020150139586A KR20170040826A (ko) | 2015-10-05 | 2015-10-05 | 소결광 제조장치 및 제조방법 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2017061664A1 true WO2017061664A1 (ko) | 2017-04-13 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/KR2015/014119 Ceased WO2017061664A1 (ko) | 2015-10-05 | 2015-12-22 | 소결광 제조장치 및 제조방법 |
Country Status (6)
| Country | Link |
|---|---|
| JP (1) | JP2018505965A (ko) |
| KR (1) | KR20170040826A (ko) |
| CN (1) | CN107208977A (ko) |
| AT (1) | AT518585A2 (ko) |
| DE (1) | DE112015005874T5 (ko) |
| WO (1) | WO2017061664A1 (ko) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110273065B (zh) * | 2018-03-14 | 2021-05-14 | 宝山钢铁股份有限公司 | 一种铁矿石微波烧结方法 |
| CN110699542A (zh) * | 2019-10-22 | 2020-01-17 | 安徽省东岷恒大冶金科技有限公司 | 一种烧结表层矿提质改性的工艺方法及装置 |
| CN112410544B (zh) * | 2020-01-19 | 2023-03-10 | 中冶长天国际工程有限责任公司 | 一种双层烧结方法 |
| AU2021386878A1 (en) * | 2020-11-24 | 2023-06-22 | Technological Resources Pty. Limited | Biomass direct reduced iron |
| WO2022109665A1 (en) | 2020-11-24 | 2022-06-02 | Technological Resources Pty. Limited | Biomass direct reduced iron |
| CN113483554B (zh) * | 2021-05-14 | 2022-06-07 | 中冶长天国际工程有限责任公司 | 一种高炉精料用块矿的烘干装置及烘干方法 |
| CN113503722B (zh) * | 2021-05-14 | 2022-06-14 | 中冶长天国际工程有限责任公司 | 一种多热源耦合加热块矿的烘干装置及烘干方法 |
| KR20240105430A (ko) | 2021-12-16 | 2024-07-05 | 제이에프이 스틸 가부시키가이샤 | 소결광의 제조 방법 |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR950018555A (ko) * | 1993-12-29 | 1995-07-22 | 조말수 | 소결광의 제조방법 |
| JPH0814763A (ja) * | 1994-06-29 | 1996-01-19 | Nippon Steel Corp | 焼結鉱製造方法 |
| JPH11106837A (ja) * | 1997-10-03 | 1999-04-20 | Nippon Steel Corp | 焼結鉱製造方法 |
| KR20130016534A (ko) * | 2011-08-08 | 2013-02-18 | 주식회사 포스코 | 통기성 향상을 위한 소결광 및 그 제조방법 |
| KR20130048954A (ko) * | 2011-11-03 | 2013-05-13 | 주식회사 포스코 | 소결광 통기장치 |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4590001B2 (ja) * | 2008-02-27 | 2010-12-01 | 新日本製鐵株式会社 | 焼結鉱の製造方法および焼結機 |
| KR101034955B1 (ko) | 2008-08-29 | 2011-05-17 | 주식회사 포스코 | 소결광 배합원료 수분 제거장치 및 방법 |
| CN201852437U (zh) * | 2010-10-20 | 2011-06-01 | 青岛迈可威微波应用技术有限公司 | 隧道连续式微波高温加热炉 |
-
2015
- 2015-10-05 KR KR1020150139586A patent/KR20170040826A/ko not_active Ceased
- 2015-12-22 JP JP2017536837A patent/JP2018505965A/ja active Pending
- 2015-12-22 DE DE112015005874.5T patent/DE112015005874T5/de not_active Ceased
- 2015-12-22 WO PCT/KR2015/014119 patent/WO2017061664A1/ko not_active Ceased
- 2015-12-22 AT ATA9484/2015A patent/AT518585A2/de not_active Application Discontinuation
- 2015-12-22 CN CN201580074900.3A patent/CN107208977A/zh active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR950018555A (ko) * | 1993-12-29 | 1995-07-22 | 조말수 | 소결광의 제조방법 |
| JPH0814763A (ja) * | 1994-06-29 | 1996-01-19 | Nippon Steel Corp | 焼結鉱製造方法 |
| JPH11106837A (ja) * | 1997-10-03 | 1999-04-20 | Nippon Steel Corp | 焼結鉱製造方法 |
| KR20130016534A (ko) * | 2011-08-08 | 2013-02-18 | 주식회사 포스코 | 통기성 향상을 위한 소결광 및 그 제조방법 |
| KR20130048954A (ko) * | 2011-11-03 | 2013-05-13 | 주식회사 포스코 | 소결광 통기장치 |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20170040826A (ko) | 2017-04-14 |
| DE112015005874T5 (de) | 2017-10-19 |
| CN107208977A (zh) | 2017-09-26 |
| JP2018505965A (ja) | 2018-03-01 |
| AT518585A2 (de) | 2017-11-15 |
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