WO2022270027A1 - 気体還元材の吹込み方法および高炉用羽口 - Google Patents
気体還元材の吹込み方法および高炉用羽口 Download PDFInfo
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- WO2022270027A1 WO2022270027A1 PCT/JP2022/009891 JP2022009891W WO2022270027A1 WO 2022270027 A1 WO2022270027 A1 WO 2022270027A1 JP 2022009891 W JP2022009891 W JP 2022009891W WO 2022270027 A1 WO2022270027 A1 WO 2022270027A1
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- Prior art keywords
- tuyere
- blast furnace
- flow hole
- main flow
- gas
- Prior art date
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- 239000000463 material Substances 0.000 title claims abstract description 31
- 238000000034 method Methods 0.000 title claims abstract description 27
- 238000007664 blowing Methods 0.000 title claims abstract description 15
- 239000007789 gas Substances 0.000 claims abstract description 108
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 48
- 239000001301 oxygen Substances 0.000 claims abstract description 48
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 48
- 238000002485 combustion reaction Methods 0.000 claims abstract description 41
- 239000003638 chemical reducing agent Substances 0.000 claims description 41
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 24
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 12
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 12
- 238000002347 injection Methods 0.000 claims description 11
- 239000007924 injection Substances 0.000 claims description 11
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 10
- 229910002091 carbon monoxide Inorganic materials 0.000 claims description 10
- LCGLNKUTAGEVQW-UHFFFAOYSA-N Dimethyl ether Chemical compound COC LCGLNKUTAGEVQW-UHFFFAOYSA-N 0.000 claims description 8
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 claims description 8
- KDKYADYSIPSCCQ-UHFFFAOYSA-N but-1-yne Chemical compound CCC#C KDKYADYSIPSCCQ-UHFFFAOYSA-N 0.000 claims description 8
- 239000001257 hydrogen Substances 0.000 claims description 7
- 229910052739 hydrogen Inorganic materials 0.000 claims description 7
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 6
- VXNZUUAINFGPBY-UHFFFAOYSA-N 1-Butene Chemical compound CCC=C VXNZUUAINFGPBY-UHFFFAOYSA-N 0.000 claims description 4
- OTMSDBZUPAUEDD-UHFFFAOYSA-N Ethane Chemical compound CC OTMSDBZUPAUEDD-UHFFFAOYSA-N 0.000 claims description 4
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 claims description 4
- 239000005977 Ethylene Substances 0.000 claims description 4
- HSFWRNGVRCDJHI-UHFFFAOYSA-N alpha-acetylene Natural products C#C HSFWRNGVRCDJHI-UHFFFAOYSA-N 0.000 claims description 4
- 239000001273 butane Substances 0.000 claims description 4
- IAQRGUVFOMOMEM-UHFFFAOYSA-N butene Natural products CC=CC IAQRGUVFOMOMEM-UHFFFAOYSA-N 0.000 claims description 4
- 125000002534 ethynyl group Chemical group [H]C#C* 0.000 claims description 4
- IJDNQMDRQITEOD-UHFFFAOYSA-N n-butane Chemical compound CCCC IJDNQMDRQITEOD-UHFFFAOYSA-N 0.000 claims description 4
- OFBQJSOFQDEBGM-UHFFFAOYSA-N n-pentane Natural products CCCCC OFBQJSOFQDEBGM-UHFFFAOYSA-N 0.000 claims description 4
- 239000001294 propane Substances 0.000 claims description 4
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 claims description 4
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 claims description 4
- MWWATHDPGQKSAR-UHFFFAOYSA-N propyne Chemical compound CC#C MWWATHDPGQKSAR-UHFFFAOYSA-N 0.000 claims description 4
- 229910021529 ammonia Inorganic materials 0.000 claims description 3
- 125000004435 hydrogen atom Chemical class [H]* 0.000 claims 1
- 239000000571 coke Substances 0.000 description 18
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 10
- 239000003245 coal Substances 0.000 description 10
- 230000000052 comparative effect Effects 0.000 description 6
- 229910002092 carbon dioxide Inorganic materials 0.000 description 5
- 150000002431 hydrogen Chemical class 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 239000003345 natural gas Substances 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- 239000000295 fuel oil Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 239000006227 byproduct Substances 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 239000000498 cooling water Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000002309 gasification Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000002803 fossil fuel Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
Classifications
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B7/00—Blast furnaces
- C21B7/16—Tuyéres
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B5/00—Making pig-iron in the blast furnace
- C21B5/001—Injecting additional fuel or reducing agents
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B5/00—Making pig-iron in the blast furnace
- C21B5/001—Injecting additional fuel or reducing agents
- C21B5/003—Injection of pulverulent coal
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B7/00—Blast furnaces
- C21B7/16—Tuyéres
- C21B7/163—Blowpipe assembly
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B5/00—Making pig-iron in the blast furnace
- C21B5/001—Injecting additional fuel or reducing agents
- C21B2005/005—Selection or treatment of the reducing gases
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/10—Reduction of greenhouse gas [GHG] emissions
- Y02P10/122—Reduction of greenhouse gas [GHG] emissions by capturing or storing CO2
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/10—Reduction of greenhouse gas [GHG] emissions
- Y02P10/143—Reduction of greenhouse gas [GHG] emissions of methane [CH4]
Definitions
- the present invention relates to a gaseous reducing agent injection method and a blast furnace tuyere used for injecting a gaseous reducing agent into a blast furnace.
- pulverized coal and hot air of about 1200 ° C are blown from the tuyeres, and the coke and pulverized coal react with oxygen in the hot air. Iron ore, etc. are reduced.
- the mainstream operation was to use only coke or coke and heavy oil blown from the tuyeres as reducing agents, but at present, pulverized coal is being used as part of the reducing agent instead of coke.
- a pulverized coal injection technique has been established in which pulverized coal pulverized to a size of 100 ⁇ m or less is injected from a tuyere.
- Patent Literature 1 discloses a technique for reducing CO 2 gas discharged from a blast furnace by effectively using blast furnace exhaust gas.
- regenerated methane is synthesized from CO and CO2 in the blast furnace exhaust gas, and by blowing it again from the tuyere as a reducing agent, carbon is circulated within the blast furnace process, and the CO2 emitted from the blast furnace is reduced. are reducing.
- the reducing material blown from the tuyeres undergoes a combustion reaction with the oxygen-containing gas blown therewith. Oxygen remaining without reacting with the reducing agent, carbon dioxide (CO 2 ) and water vapor (H 2 O) generated by the combustion reaction with the reducing agent react with the coke in the coke packed bed in front of the tuyere. . These finally become a high-temperature reducing gas (hereinafter referred to as Bosch gas) composed of carbon monoxide (CO), hydrogen (H 2 ), and nitrogen (N 2 ).
- Bosch gas high-temperature reducing gas
- the Bosh gas generated at the tip of the tuyere is a gas that reduces iron ore, and at the same time, it pushes out the coke in front of the tuyere to form a combustion space called a raceway in front of the tuyere. Fulfill.
- the raceway is important as a space for sufficiently burning the reducing material such as pulverized coal blown from the tuyere. will drop significantly. Therefore, in order to save energy in the blast furnace and the ironmaking process, it is important to form a raceway in front of the tuyere and stably supply the reducing material to this raceway.
- Non-Patent Document 1 discloses that the size of the raceway can be estimated from the diameter of the tuyere, the velocity of the discharged gas at the tip of the tuyere, and the like.
- Non-Patent Document 2 discloses a technique for improving the gasification rate of pulverized coal in a raceway by premixing a solid reducing material such as pulverized coal and a combustion-supporting gas containing oxygen in the tuyeres. disclosed.
- Non-Patent Document 2 if a reducing gas such as B gas or hydrogen or a combustible gas such as natural gas or regenerated methane is added as a reducing agent, in the raceway space in front of the tuyere So-called intra-tuyere combustion may occur in which the resulting combustion flame returns into the tuyere.
- This tuyere combustion causes problems such as erosion and thermal deformation of the tip of the burner that is not water-cooled. By water-cooling the tip of the burner in addition to the tuyere, it is possible to prevent melting damage and thermal deformation of the burner. problems will arise.
- Non-Patent Document 3 discloses a tuyere for injecting heavy oil as a reducing agent into a blast furnace, and a reducing agent injection nozzle for injecting heavy oil is provided in the vicinity of a connection with a blow pipe.
- Non-Patent Document 3 reducing gas such as B gas and hydrogen, combustible gas such as natural gas and regenerated methane It is also possible to add However, when the combustion flame generated in the raceway space in front of the tuyere returns to the inside of the tuyere, combustion continues in the tuyere taper, increasing the heat load and damaging the reducing agent injection nozzle. A problem arises.
- the inventors have made intensive studies to solve the above-mentioned problems in the conventional technology, and as a result, have developed a method for injecting a gaseous reducing agent and a tuyere for a blast furnace according to the present invention.
- the present invention provides a blast furnace tuyere that prevents combustion reaction in the vicinity of the connection with the blowpipe and prevents the combustion flame generated in the raceway space in front of the tuyere from returning into the tuyere.
- An object of the present invention is to provide a method for injecting a reducing material and a tuyere for a blast furnace.
- a method of injecting a gaseous reducing agent into a blast furnace using blast furnace tuyeres wherein the blast furnace tuyeres are provided in a main flow hole and radially outside the main flow hole.
- the oxygen-containing gas flowing through the main flow hole is increased in flow velocity at the tip of the tuyere of the main flow hole, and the gas reducing material flowing through the secondary flow hole is supplied to the main flow hole.
- the gaseous reducing material is at least B gas, C gas, ammonia, carbon monoxide, hydrogen, methane, ethane, ethylene, acetylene, propane, propylene, propyne, butane, butene, butyne, methanol, ethanol and dimethyl ether.
- the method of injecting a gaseous reducing material according to any one of [1] to [3], including one.
- a blast furnace tuyere for blowing a gaseous reducing agent into a blast furnace comprising a main flow hole and a secondary flow hole provided around the main flow hole, and a tuyere tip portion of the main flow hole is equal to or less than the inner diameter of the blow pipe that supplies gas to the portion other than the tip of the tuyere and to the main flow hole, and the end of the secondary flow hole on the tip side of the tuyere is the same as that of the main flow hole.
- a tuyere for a blast furnace which is formed so as to merge with the tip of the tuyere.
- the gas reducing material joins the oxygen-containing gas at the tuyere tip of the main flow hole, and enters the blast furnace from the tuyere tip together with the oxygen-containing gas. Dispensed. Therefore, no combustion reaction occurs in the vicinity of the connecting portion of the tuyere for blast furnace with the blowpipe, and the oxygen-containing gas and the gaseous reducing agent are discharged into the furnace from the tip of the tuyere and then burned.
- the flow velocity of the mixed gas discharged from the tip of the tuyere of the main flow hole increases, it is possible to suppress the combustion flame generated in the raceway space in front of the tuyere from returning into the tuyere.
- the flow velocity of the gas discharged from the tip of the tuyere of the main flow hole becomes sufficiently higher than the combustion speed. Combustion flame generated in the raceway space in front of the mouth can be reliably prevented from returning to the tuyere.
- FIG. 1 is a schematic diagram showing an example of a cross section of a tuyere for a blast furnace according to the present invention.
- 2(a) to 2(c) are schematic views showing cross sections of blast furnace tuyeres of invention examples and comparative examples. It is a graph which shows the example of the temperature change in the tuyere for blast furnaces of a comparative example.
- FIG. 1 schematically shows a cross section of a blast furnace tuyere 10 of this embodiment.
- a blast furnace tuyere 10 of the present embodiment is for blowing a gaseous reducing material into a blast furnace, and has a main flow hole 12 and a secondary flow hole 14 provided radially outside the main flow hole 12.
- the main flow hole 12 is a flow hole for blowing oxygen-containing gas into the blast furnace.
- the auxiliary flow hole 14 is a flow hole different from the main flow hole 12, and is a flow hole for blowing the gaseous reducing agent into the blast furnace.
- a tuyere tip 13 having an inner diameter DT and a length L is provided on the oxygen-containing gas discharge side of the main flow hole 12 .
- the inner diameter D T of the tuyere tip portion 13 is the same as or smaller than the inner diameter D B of the portion of the main flow hole 12 other than the tuyere tip portion 13 and the blow pipe 30 that supplies gas to the main flow hole 12 . It is The length L of the tuyere tip portion 13 is set larger than the inner diameter DT .
- the tuyere tip side of the auxiliary flow hole 14 that is, the end on the tuyere tip portion 13 side is formed so as to merge with the tuyere tip portion 13 of the main flow hole 12 .
- the gaseous reducing agent injection method of the present embodiment uses the blast furnace tuyere 10 to inject the gaseous reducing agent into the blast furnace. Specifically, the flow velocity of the oxygen-containing gas supplied from the blow pipe 30 to the main flow hole 12 is increased at the tuyere tip portion 13 of the main flow hole 12 and blown into the blast furnace. Along with this, the gaseous reducing material is merged with the oxygen-containing gas flowing through the tuyere tip portion 13 of the main flow hole 12 from the auxiliary flow hole 14 and blown into the blast furnace.
- the inner diameter DT of the tuyere tip portion 13 of the main flow hole 12 is the blowpipe that supplies gas to the portion of the main flow hole 12 other than the tuyere tip portion 13 and the main flow hole 12.
- the inner diameter DB of 30 is equal to or smaller than that.
- the flow velocity of the oxygen-containing gas supplied from the blow pipe 30 to the main flow hole 12 is increased at the tuyere tip portion 13 of the main flow hole 12 .
- the tuyere tip side of the sub-circulation hole 14 that is, the end on the tuyere tip 13 side is formed so as to merge with the tuyere tip 13 of the main flow hole 12 .
- the gas reducing material blown in from the main flow hole 12 is made to join the oxygen-containing gas flowing through the tuyere tip portion 13 of the main flow hole 12 .
- the combustion/gasification reaction between the oxygen-containing gas blown from the main flow hole 12, the coke in the coke packed bed in the blast furnace in front of the blast furnace tuyere 10, and the gaseous reducing material blown from the auxiliary flow hole 14. produces bosh gas.
- a raceway 20 is formed in front of the blast furnace tuyere 10 by this bosh gas.
- the oxygen-containing gas blown from the main flow holes 12 it is preferable to use a gas containing 50% by volume or more of oxygen.
- a gas containing 50% by volume or more of oxygen as an oxygen-containing gas, the combustion of the gaseous reducing agent is promoted even if the amount of gaseous reducing agent injected is increased, and the amount of coke used in blast furnace operation can be further reduced. CO 2 emitted from can be greatly reduced.
- the inner diameter DT of the tuyere tip portion 13 of the main flow hole 12 should be equal to or larger than the inner diameter DB of the blowpipe 30. is also made smaller to increase the flow velocity of the oxygen-containing gas at the tuyere tip 13 . Then, the gas reducing material supplied from the auxiliary flow hole 14 joins the oxygen-containing gas at the tuyere tip portion 13 .
- the premixed gas of the oxygen-containing gas and the gas reducing agent does not exist in the vicinity of the connection part of the tuyere for blast furnace 10 with the blow pipe 30, and combustion in the vicinity of the taper part in the tuyere is performed. reaction can be prevented. Then, since the premixed gas of the oxygen-containing gas and the gaseous reducing agent merged at the tuyere tip 13 is discharged into the blast furnace from the tuyere tip 13 at a high flow velocity, it flows into the blast furnace from the tuyere tip 13. Burns after being expelled.
- the length of the tuyere tip portion 13 whose inner diameter DT is reduced be longer than the inner diameter DT , since the flow velocity of the oxygen-containing gas at the tuyere tip portion 13 can be reliably increased. Also, if the main flow hole 12 is formed such that the inner diameter gradually decreases as it approaches the tuyere tip portion 13 from the connection portion with the blowpipe 30, the oxygen-containing gas is also formed at the tuyere tip portion 13. This is preferable because the flow rate can be reliably increased.
- the flow velocity of the gas discharged from the tuyere tip 13 of the main flow hole 12 is preferably 55 times or more the combustion velocity of the mixed gas of the oxygen-containing gas and the gaseous reducing agent that merge at the tuyere tip 13 .
- the combustion rate of the mixed gas of the oxygen-containing gas and the gaseous reducing agent for example, the numerical value disclosed in Non-Patent Document 4 can be used. By doing so, it is possible to reliably prevent the combustion flame generated in the raceway 20 in front of the blast furnace tuyere 10 from returning into the blast furnace tuyere 10 .
- Examples of the gaseous reducing agent blown from the secondary flow holes 14 include B gas (blast furnace gas), C gas (coke oven gas), ammonia, carbon monoxide, hydrogen, methane, ethane, ethylene, acetylene, propane, propylene, and propyne. , butane, butene, butyne, methanol, ethanol, dimethyl ether and natural gas can be used.
- B gas blast furnace gas
- C gas coke oven gas
- carbon monoxide hydrogen, methane, ethane, ethylene, acetylene, propane, propylene, propyne, butane, butene, butyne, methanol, ethanol, dimethyl ether and natural gas. Since these gases are by-products in the steel manufacturing process, or are produced from by-product gases, the carbon is circulated within the steel manufacturing process, thereby causing the carbon to be emitted by the steel manufacturing process. The amount of CO2 generated can be reduced.
- the plurality of sub-flow holes 14 are arranged such that, of the momentum of the gas reducing material gas joining the main flow holes 12 from the plurality of sub-flow holes 14, the components in the radial direction of the main flow holes 12 cancel each other out. is preferably placed. By doing so, the momentum of the gaseous reducing material gas can be made only to the component in the length direction of the main flow hole 12 .
- FIG. Invention Example 2 and Invention Example 4 were prepared. Further, as shown in FIG. 2(b), two auxiliary flow holes 14 are provided on the radially outer side of the main flow hole 12 at positions axially symmetrical with respect to the main flow hole 12.
- a hot scale model 10B (Invention Example 3) was prepared. In the hot scale models 10A and 10B of the blast furnace tuyeres of Invention Examples 1 to 4, the center line of the secondary flow hole 14 opening at the tuyere tip portion 13 of the main flow hole 12 is aligned with the center of the main flow hole 12. I made it intersect with the line.
- a hot scale model 19 of a tuyere for a blast furnace was prepared by combining a porous burner 40 disclosed in Non-Patent Document 2. Then, oxygen was blown in through the radially outer circulation hole 41 of the porous burner 40, and city gas was blown in through the radially inner circulation hole 42 at the same flow rate as in the first to fourth invention examples.
- thermocouple was provided in the vicinity of the connection with the blow pipe 30 or the multi-hole burner 40 of the hot scale model of the blast furnace tuyere, and the temperature inside the blast furnace tuyere was was measured. Along with this, the temperature rise of the cooling water of the hot scale models 10A, 10B, and 19 of the tuyere for blast furnace was compared. The results of this combustion test are shown in Table 1.
- Invention Examples 1 to 4 Invention Examples 2 to 4, in which the flow rate of the mixed gas discharged from the tuyere tip portion 13 is large and is 55 times or more the combustion speed of the mixed gas, is higher than that in Invention Example 1. Also, the temperature rise of the cooling water of the hot scale models 10A, 10B, and 19 of the tuyere for blast furnace was suppressed.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
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- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacture Of Iron (AREA)
- Blast Furnaces (AREA)
Abstract
Description
10A、10B、19 高炉用羽口の熱間縮尺模型
12 主流通孔
13 羽口先端部
14 副流通孔
20 レースウェイ
30 ブローパイプ
40 多孔バーナー
41 径方向外側の流通孔
42 径方向内側の流通孔
DT 羽口先端部の内径
L 羽口先端部の長さ
DB ブローパイプの内径
Claims (5)
- 高炉用羽口を用いて高炉内に気体還元材を吹き込む気体還元材の吹込み方法であって、
前記高炉用羽口は主流通孔と、前記主流通孔の径方向外側に設けられる副流通孔とを有し、
前記主流通孔を流れる酸素含有ガスを、該主流通孔の羽口先端部で流速を高め、前記副流通孔を流れる気体還元材を、前記主流通孔の前記羽口先端部で前記酸素含有ガスに合流させて混合ガスとし、前記高炉内に吹き込む、気体還元材の吹込み方法。 - 前記羽口先端部からの前記混合ガスの吐出ガス流速を、前記混合ガスの燃焼速度の55倍以上にする、請求項1に記載の気体還元材の吹込み方法。
- 前記酸素含有ガスは、酸素を50体積%以上含む、請求項1または請求項2に記載の気体還元材の吹込み方法。
- 前記気体還元材は、Bガス、Cガス、アンモニア、一酸化炭素、水素、メタン、エタン、エチレン、アセチレン、プロパン、プロピレン、プロピン、ブタン、ブテン、ブチン、メタノール、エタノールおよびジメチルエーテルの少なくとも一つを含む、請求項1~請求項3のいずれかに記載の気体還元材の吹込み方法。
- 高炉内に気体還元材を吹き込む高炉用羽口であって、
主流通孔と、前記主流通孔の周囲に設けられる副流通孔とを有し、
前記主流通孔の羽口先端部の内径は、該羽口先端部以外の部分および前記主流通孔にガスを供給するブローパイプの内径以下に形成され、
前記副流通孔の羽口先端側の端部は、前記主流通孔の前記羽口先端部に合流するように形成されている、高炉用羽口。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
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CN202280043256.3A CN117529563A (zh) | 2021-06-23 | 2022-03-08 | 气体还原材料的吹入方法和高炉用风口 |
EP22827948.5A EP4339301A1 (en) | 2021-06-23 | 2022-03-08 | Gaseous reducing material blowing method and blast furnace tuyere |
KR1020237043181A KR20240007681A (ko) | 2021-06-23 | 2022-03-08 | 기체 환원재의 취입 방법 및 고로용 트위어 |
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Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0215105A (ja) * | 1988-07-01 | 1990-01-18 | Nkk Corp | 高炉の微粉炭吹込み方法 |
JPH11241108A (ja) * | 1997-12-24 | 1999-09-07 | Nippon Steel Corp | 高炉への微粉炭吹き込み方法 |
JP2006233332A (ja) * | 2005-01-31 | 2006-09-07 | Jfe Steel Kk | 高炉操業方法 |
JP2006241586A (ja) * | 2004-09-30 | 2006-09-14 | Jfe Steel Kk | 高炉への還元材吹込み装置、該装置を用いた高炉操業方法 |
JP2011225969A (ja) | 2010-03-29 | 2011-11-10 | Jfe Steel Corp | 高炉又は製鉄所の操業方法 |
JP2020117761A (ja) * | 2019-01-23 | 2020-08-06 | Jfeスチール株式会社 | 高炉用羽口、高炉用羽口設備および粒状固体還元材の吹込み方法 |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2000212617A (ja) | 1999-01-25 | 2000-08-02 | Nisshin Steel Co Ltd | 高炉送風羽口 |
JP3644856B2 (ja) | 1999-10-20 | 2005-05-11 | 株式会社神戸製鋼所 | 高炉への補助燃料吹込み操業方法 |
-
2021
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- 2022-03-08 CN CN202280043256.3A patent/CN117529563A/zh active Pending
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Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0215105A (ja) * | 1988-07-01 | 1990-01-18 | Nkk Corp | 高炉の微粉炭吹込み方法 |
JPH11241108A (ja) * | 1997-12-24 | 1999-09-07 | Nippon Steel Corp | 高炉への微粉炭吹き込み方法 |
JP2006241586A (ja) * | 2004-09-30 | 2006-09-14 | Jfe Steel Kk | 高炉への還元材吹込み装置、該装置を用いた高炉操業方法 |
JP2006233332A (ja) * | 2005-01-31 | 2006-09-07 | Jfe Steel Kk | 高炉操業方法 |
JP2011225969A (ja) | 2010-03-29 | 2011-11-10 | Jfe Steel Corp | 高炉又は製鉄所の操業方法 |
JP2020117761A (ja) * | 2019-01-23 | 2020-08-06 | Jfeスチール株式会社 | 高炉用羽口、高炉用羽口設備および粒状固体還元材の吹込み方法 |
Non-Patent Citations (4)
Title |
---|
JAPAN SOCIETY FOR SAFETY ENGINEERING: "Handbook of Safety Engineering", July 2019, CORONA PUBLISHING CO., LTD., pages: 241 |
NAOMICHI UKAI: "Transition of Tuyeres", KINZOKU (MATERIALS SCIENCE AND TECHNOLOGY, vol. 48, no. 3, March 1978 (1978-03-01), pages 39 - 43 |
TAKESHI FURUKAWAMASAHIRO MATSUURAYOTARO OHNOSUMIYUKI KISHIMOTO: "Effect of the Structures of Injection Facilities on Combustion Characteristics in the Pulverized Coal Injection into a Blast Furnace", TETSU-TO-HAGANE, vol. 82, no. 12, December 1996 (1996-12-01), pages 993 - 998 |
YOTARO OHNOTAKESHI FURUKAWAMASAHIRO MATSUURA: "Combustion Behavior of Pulverized Coal in a Raceway Cavity of Blast Furnace and a Large Amount Injection Technology", TETSU-TO-HAGANE, vol. 78, no. 1, January 1992 (1992-01-01), pages 50 - 57 |
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TW202332780A (zh) | 2023-08-16 |
CN117529563A (zh) | 2024-02-06 |
KR20240007681A (ko) | 2024-01-16 |
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