WO2013094229A1 - 高炉操業方法 - Google Patents

高炉操業方法 Download PDF

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Publication number
WO2013094229A1
WO2013094229A1 PCT/JP2012/055886 JP2012055886W WO2013094229A1 WO 2013094229 A1 WO2013094229 A1 WO 2013094229A1 JP 2012055886 W JP2012055886 W JP 2012055886W WO 2013094229 A1 WO2013094229 A1 WO 2013094229A1
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WO
WIPO (PCT)
Prior art keywords
pulverized coal
blast furnace
lance
gas
vol
Prior art date
Application number
PCT/JP2012/055886
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English (en)
French (fr)
Japanese (ja)
Inventor
明紀 村尾
大樹 藤原
渡壁　史朗
Original Assignee
Ｊｆｅスチール株式会社
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
Priority claimed from JP2011279955A external-priority patent/JP5923968B2/ja
Application filed by Ｊｆｅスチール株式会社 filed Critical Ｊｆｅスチール株式会社
Priority to CN201280064116.0A priority Critical patent/CN104039985A/zh
Priority to KR1020147019597A priority patent/KR101629122B1/ko
Priority to BR112014015099A priority patent/BR112014015099B1/pt
Priority to EP12859458.7A priority patent/EP2796565B1/en
Priority to IN1257KON2014 priority patent/IN2014KN01257A/en
Priority to AU2012355193A priority patent/AU2012355193B2/en
Publication of WO2013094229A1 publication Critical patent/WO2013094229A1/ja

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    • 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

Definitions

  • the present invention relates to a method of operating a blast furnace in which pulverized coal is blown from a blast furnace tuyere and the combustion temperature is increased to improve productivity and reduce exhaust CO 2 .
  • Blast furnaces mainly use pulverized coal blown from coke and tuyere as a reducing material. From the difference in carbon dioxide emissions generated by pretreatment, it is possible to use pulverized coal rather than coke as much as possible for CO 2 emissions. Leads to suppression.
  • Patent Document 1 pulverized coal with a pulverized coal ratio of 150 kg / t-pig iron or more and volatile content of 25 mass% or less is used, and pulverized coal and oxygen are supplied to a lance for injecting fuel from the tuyere Combustion efficiency can be improved by setting the oxygen concentration of the gas to 70 vol% or more.
  • a mixture of oxygen and pulverized coal is blown from the lance.
  • the lance is a double pipe
  • the pulverized coal is injected from the inner pipe of the double pipe lance. It has also been proposed to blow oxygen from the outer tube of the double tube lance.
  • the pulverized coal ratio is the mass of pulverized coal used per 1 ton of pig iron.
  • two double pipe lances that blow pulverized coal from the inner pipe and oxygen from the outer pipe are used so as to be opposed to each other, and are extended lines of the central axes of the two double pipe lances. Does not intersect with each other and does not intersect with the center of the blower pipe (blow pipe), thereby improving the combustibility.
  • the oxygen blowing angle with respect to the center of the lance from the outer pipe is set to 30 ° or more so that oxygen is brought close to the main stream line of pulverized coal. Note that the angle formed by the lance and the blower tube (the lance blowing angle with respect to the blowing direction) is larger than 45 °.
  • the lance may be exposed to high temperatures, and as described in Patent Document 1, a mixture of high-concentration oxygen and pulverized coal is supplied to the single tube lance. This is not practical from a safety standpoint. Further, since further reduction of exhausted CO 2 is required, for example, it is desired that the pulverized coal ratio be 170 kg / t-pig iron or more, but the pulverized coal ratio is higher than 170 kg / t-pig iron. In the pulverized coal ratio, as described in Patent Document 1, even if pulverized coal is simply blown from the inner pipe of the double pipe lance and oxygen is blown from the outer pipe, the combustion temperature is saturated and combustion efficiency is increased. Does not increase.
  • the present invention has been made paying attention to the above-mentioned problems, and can improve the combustion temperature without damaging the tuyere and the air duct. As a result, the emission CO 2 can be reduced.
  • the purpose is to provide a blast furnace operating method.
  • the present invention provides the following blast furnace operating method. (1) Prepare pulverized coal with a volatile content of 25 mass% or less, Prepare two double pipe lances with inner and outer pipes for blowing pulverized coal and supporting gas from the tuyere, Hot air is blown from the tuyere, Injecting the pulverized coal with a carrier gas from the inner pipe of the two double-pipe lances at a pulverized coal ratio of 150 kg / t-pig iron or more, Blowing inflammable gas from the outer pipe of the two double pipe lances, The oxygen concentration of the gas composed of the carrier gas and the combustion-supporting gas is 35 vol% or more, Blast furnace operation method.
  • Method. 10
  • the blast furnace operating method according to (9), wherein an oxygen concentration of a gas composed of the carrier gas and the combustion-supporting gas is 40 vol% or more and 65 vol% or less.
  • the pulverized coal ratio is 150 kg / t-pig iron or more and less than 170 kg / t-pig iron, and the oxygen concentration of the gas composed of the carrier gas and the combustion-supporting gas is 35 vol. Or more and less than 70 vol%.
  • the lance for injecting fuel from the tuyere is a double pipe, and pulverized coal is injected together with the carrier gas from the inner pipes of the two double pipe lances.
  • pulverized coal is injected together with the carrier gas from the inner pipes of the two double pipe lances.
  • the oxygen concentration of the gas composed of the carrier gas and the combustion-supporting gas in the double-pipe lance is set to less than 70 vol%, thereby supporting combustion such as oxygen.
  • the basic unit of the property gas can be suppressed.
  • FIG. 11A and FIG. 11B are explanatory diagrams of the insertion angle of the lance with respect to the blower pipe.
  • FIG. 1 is an overall view of a blast furnace to which the blast furnace operating method of the present embodiment is applied.
  • a blast pipe 2 for blowing hot air is connected to the tuyere 3 of the blast furnace 1, and a lance 4 is installed through the blast pipe 2.
  • a combustion space called a raceway 5 exists in the coke deposit layer in the hot air blowing direction ahead of the tuyere 3, and the reducing material is mainly combusted and gasified in this combustion space.
  • FIG. 2 shows a combustion state when only pulverized coal 6 is blown from the lance 4 as a solid reducing material.
  • the pulverized coal 6 that has passed through the tuyere 3 from the lance 4 and is blown into the raceway 5 is combusted with coke 7 and its volatile matter and fixed carbon, and the volatile matter is released and is generally called char.
  • the aggregate of carbon and ash is discharged as unburned char 8 from the raceway.
  • the hot air velocity at the tip of the tuyere 3 in the direction of blowing hot air is about 200 m / sec, and the oxygen existing area in the raceway 5 from the tip of the lance 4 is about 0.3 to 0.5 m.
  • FIG. 3 shows a combustion mechanism when only pulverized coal (PC: Pulverized Coal in the figure) 6 is blown from the lance 4 into the blower pipe 2.
  • PC Pulverized Coal in the figure
  • the pulverized coal 6 blown into the raceway 5 from the tuyere 3 is heated by the radiant heat transfer from the flame in the raceway 5, and the temperature of the pulverized coal 6 is rapidly increased by the radiant heat transfer and conduction heat transfer.
  • the thermal decomposition starts when the temperature is raised to 300 ° C. or more, and the volatile matter is ignited to form a flame, and the combustion temperature reaches 1400 to 1700 ° C.
  • the above-described char 8 is obtained. Since the char 8 is mainly fixed carbon, a reaction called a carbon dissolution reaction such as a solution loss reaction and a hydrogen gas shift reaction also occurs along with the combustion reaction.
  • FIG. 4 shows a combustion mechanism when oxygen 9 is blown into the blower pipe 2 from the lance 4 together with the pulverized coal 6 as a combustion-supporting gas.
  • the method of blowing pulverized coal 6 and oxygen 9 simply shows a case of blowing in parallel.
  • the dashed-two dotted line in a figure has shown the combustion temperature at the time of injecting only the pulverized coal shown in FIG. 3 with reference.
  • a combustion experiment was conducted using the combustion experiment apparatus shown in FIG. Simulating the inside of the blast furnace, the experimental furnace 11 is filled with coke, and the inside of the raceway 15 can be observed from the viewing window.
  • a lance 14 is inserted into the blower pipe 12 so that hot air generated in the combustion burner 13 can be blown into the experimental furnace 11 as a hot air to be blown from the hot blast furnace to the blast furnace.
  • this ventilation pipe 12 it is also possible to adjust the oxygen enrichment amount of ventilation.
  • the lance 14 can blow either one or both of pulverized coal and oxygen into the blower pipe 12.
  • the exhaust gas generated in the experimental furnace 11 is separated into exhaust gas and dust by a separator 16 called a cyclone, the exhaust gas is fed to an exhaust gas treatment facility such as an auxiliary combustion furnace, and the dust is collected in a collection box 17.
  • the specifications of pulverized coal are 71.4% fixed carbon (FC), 19.5% volatile matter (VM), and 9.1% ash (Ash).
  • the air blowing conditions were as follows: air temperature 1200 ° C., flow rate 300 Nm 3 / h, tuyere wind speed 130 m / s, oxygen enrichment 6% (oxygen concentration 27.0%, air oxygen concentration 21%, richness 6.0% ).
  • a pulverized coal blowing condition a double pipe lance was used for the lance 14, pulverized coal was blown from the inner pipe of the double pipe lance, and oxygen was blown as a combustion supporting gas from the outer pipe of the double pipe lance. .
  • the pulverized coal was blown together with the carrier gas, and nitrogen was used as the carrier gas for the pulverized coal.
  • the solid-gas ratio of pulverized coal and the carrier gas that transports the pulverized coal is 10-25 kg / Nm 3 in the solid-gas ratio in the method of transporting powder, that is, pulverized coal (high concentration transport) with a small amount of gas.
  • the solid-gas ratio is 5 to 10 kg / Nm 3 .
  • air can also be used as the carrier gas.
  • the pulverized coal ratio was variously changed between 100 kg / t and 180 kg / t, and an experiment was conducted particularly on the change of the pulverized coal flow.
  • oxygen-enriched air can also be used as the combustion-supporting gas.
  • the present inventors further obtained the following knowledge. That is, when pulverized coal is blown from the inner pipe of the double pipe lance and combustion supporting gas, that is, oxygen is blown from the outer pipe, even if the volatile content of the pulverized coal is 25 mass% or less, the pulverized coal ratio is 150 kg / If the operation is a low pulverized coal ratio operation less than t, the combustion temperature increases by increasing the oxygen concentration. However, in a high pulverized coal ratio operation where the pulverized coal ratio is 150 kg / t or higher, the combustion temperature does not increase even if the oxygen concentration is increased.
  • the combustion temperature is saturated at an oxygen concentration of about 35 vol%.
  • concentration also referred to as concentration
  • oxygen blown from the outer pipe of the double pipe lance This is because it becomes difficult to contact or no longer contacts. Therefore, in the present invention, two double pipe lances are used, and the amount of pulverized coal blown from the inner pipe of each double pipe lance is reduced.
  • the combustion temperature is saturated at an oxygen concentration of about 70 vol% and does not increase. In other words, even if the oxygen concentration is further increased, the combustion efficiency does not increase only by increasing the oxygen intensity.
  • FIG. 6 (a) shows the pulverized coal flow in the low pulverized coal ratio operation state where the pulverized coal ratio is less than 150 kg / t.
  • the dispersion width of the pulverized coal is almost constant.
  • the pulverized coal flow has a substantially uniform concentration within the dispersion width.
  • the central portion within the dispersion width is concentrated, and in particular, the pulverized coal ratio is as high as 170 kg / t or higher.
  • the central part of the pulverized coal flow is remarkably concentrated. Since oxygen is blown from the outer pipe of the double-pipe lance, the pulverized coal concentrated in the center of the pulverized coal flow does not come into contact with oxygen, but is brought into the furnace unburned to ventilate the blast furnace. make worse. Even if the oxygen blowing amount is increased to promote contact with oxygen, as shown in FIG. 6 (c), when the oxygen blowing amount becomes a certain amount or more, the oxygen flow in the central portion of the surrounding oxygen flow is increased. As the pulverized coal flow is further concentrated, the contact with oxygen is not substantially promoted, and the combustion temperature is saturated as will be described later.
  • two double pipe lances 4 are used, pulverized coal is blown from the inner pipes of the double pipe lances 4, and combustion is supported from the respective outer pipes. Inject oxygen, a sex gas.
  • the double pipe lance 4 is arranged so that the two pulverized coal flows do not overlap.
  • the two double pipe lances 4 are arranged so as to be eccentric so that the axes of the two double pipe lances 4, particularly the axes of their tip portions do not intersect. That's fine.
  • the pulverized coal flow is concentrated in the overlapped portion, the contact with oxygen is hindered, and the combustion temperature may be saturated or lowered. is there. If the two pulverized coal flows blown from the two double-pipe lances 4 do not overlap, the amount of pulverized coal in the pulverized coal flow of each double-pipe lance 4 is 1 compared to the blow by the single lance. Since the pulverized coal injection amount is / 2, the combustion temperature is hardly saturated and the combustion temperature can be improved. As a result, the pulverized coal ratio can be increased and the exhausted CO 2 can be reduced.
  • FIG. 9 shows the case where the ratio of pulverized coal is 150 kg / t or more and less than 170 kg / t, the volatile content of pulverized coal is 25 mass% or less, the air blowing conditions are constant, the oxygen enrichment rate is constant, and only one double pipe lance 4 is used.
  • the combustion temperature when two double-pipe lances 4 were used (with eccentricity) was expressed as a combustion rate. In either case, pulverized coal was blown from the inner pipe of the double pipe lance 4, and oxygen was blown from the outer pipe as a combustion-supporting gas.
  • the oxygen concentration of the gas composed of the carrier gas for conveying the pulverized coal and the combustion-supporting gas in the lance is 35 vol% or more.
  • the combustion temperature will be saturated. That is, when there is one double-pipe lance 4, even if the oxygen concentration is 35 vol% or more, the combustion temperature does not increase.
  • two double pipe lances 4 are used eccentrically, the combustion temperature becomes high even if the oxygen concentration of the gas composed of the carrier gas and the combustion-supporting gas is 35 vol% or more. This means that in the region where the pulverized coal ratio is 150 kg / t or more and less than 170 kg / t, the pulverized coal flow blown from each double pipe lance 4 is not concentrated.
  • the pulverized coal ratio is 170 kg / t or more, as shown in FIG. 10, from the carrier gas and the combustion-supporting gas in the lance.
  • the combustion temperature is saturated, and the combustion temperature does not increase even if the oxygen concentration is further increased. That is, in the region where the pulverized coal ratio is 170 kg / t or more, the combustion efficiency is not improved simply by increasing the oxygen consumption rate when the oxygen concentration of the gas composed of the carrier gas and the combustion-supporting gas in the lance is 70 vol% or more.
  • the oxygen concentration of the gas composed of the carrier gas and the combustion-supporting gas in the lance is less than 70 vol%, preferably It is 40 vol% or more and 65 vol% or less, More preferably, it is 45 vol% or more and 60 vol% or less.
  • the upper limit of the pulverized coal ratio is 300 kg / t or less, preferably 250 kg / t or less.
  • the present inventors conducted a test on the angle formed by the lance and the blower pipe, that is, the insertion angle of the lance with respect to the blowing direction, while changing the radial distance between the lance tip and the tuyere tip inner surface.
  • the double pipe lance is a coaxial double pipe, and as described above, a straight pipe (straight pipe) is preferable.
  • the insertion angle between the lance and the blower pipe that is, the insertion angle of the lance with respect to the blower direction has a turbulent jet flow from the tip of the lance. . For example, as shown in FIG.
  • Fig. 12 is a graph showing this as a matrix of the radial distance between the tip of the lance and the inner surface of the tuyere tip.
  • the radial distance between the tip of the lance and the inner surface of the tuyere tip is indicated by-(minus) when the tip of the lance is located radially outward from the inner surface of the tip of the tuyere, and by + (plus) when it is located radially inward. did.
  • ⁇ the case where it is not good is represented by ⁇ .
  • the insertion angle ⁇ of the lance 4 and the blower tube 2 (insertion angle of the lance 4 with respect to the blowing direction) ⁇ is 45 ° or less, the combustibility decreases when the tip of the lance is radially inward from the inner surface of the tuyere tip.
  • the insertion angle (insertion angle of the lance 4 with respect to the blowing direction) ⁇ exceeds 45 °, even if the tip of the lance is radially inward from the inner surface of the tuyere tip Decrease is observed. Therefore, the insertion angle (insertion angle of the lance 4 with respect to the blowing direction) ⁇ between the lance 4 and the blower tube 2 is preferably 45 ° or less. Further, at the ⁇ (minus) position below the center of the inner surface of the tuyere tip, the pulverized coal flow from the lance hits the inner surface of the tuyere, which is indicated as “x”.
  • the detoured tip portion is short, the pulverized coal flow blown from the inner tube and the oxygen blown from the outer tube are likely to be disturbed, so the detoured tip portion needs to be at least 200 mm, preferably Is preferably 300 mm or more.
  • the outer tube of the double tube lance is easily exposed to high temperatures.
  • the lance is composed of, for example, a stainless steel pipe.
  • water cooling called a so-called water jacket is performed outside the lance
  • the tip of the lance cannot be covered.
  • the tip of the outer tube of the double tube lance that is not subject to water cooling is easily deformed by heat. If the lance is deformed, that is, bent, gas or pulverized coal cannot be blown into a desired part, and there is a problem in replacing the lance that is a consumable item.
  • the flow of pulverized coal may change and hit the tuyere, and in such a case, the tuyere may be damaged.
  • the gap with the inner pipe is closed, and if the gas does not flow from the outer pipe, the outer pipe of the double pipe lance is melted, and in some cases, the blower pipe is damaged. There is a possibility. If the lance is deformed or worn out, the combustion temperature as described above cannot be secured, and as a result, the reducing material basic unit cannot be reduced.
  • the only way to cool the outer tube of a double-pipe lance that cannot be cooled with water is to cool it with the gas flowing inside.
  • the gas flow rate is considered to affect the lance temperature. Therefore, the inventors measured the temperature of the lance surface by variously changing the flow rate of the gas blown from the outer pipe of the double pipe lance.
  • the experiment was performed by blowing oxygen from the outer pipe of the double pipe lance and blowing pulverized coal from the inner pipe, and the gas flow rate was adjusted by adjusting the amount of oxygen supplied from the outer pipe.
  • the oxygen may be oxygen-enriched air, and 2% or more, preferably 10% or more of oxygen-enriched air is used. By using oxygen-enriched air, flammability of pulverized coal is improved in addition to cooling.
  • the measurement results are shown in FIG.
  • the steel pipe called 20A schedule 5S was used for the outer pipe of the double pipe lance.
  • a steel pipe called 15A schedule 90 was used as the inner pipe of the double pipe lance, and the total flow rate of oxygen and nitrogen blown from the outer pipe was variously changed to measure the temperature of the lance surface.
  • 15A and 20A are nominal dimensions of the outer diameter of the steel pipe defined in JIS G 3459, 15A has an outer diameter of 21.7 mm, and 20A has an outer diameter of 27.2 mm.
  • the “schedule” is a nominal dimension of the thickness of the steel pipe specified in JIS G 3459.
  • the 20A schedule 5S is 1.65 mm
  • the 15A schedule 90 is 3.70 mm.
  • plain steel can also be used. In that case, the outer diameter of the steel pipe is specified in JIS G 3453, and the wall thickness is specified in JIS G 3454.
  • the temperature of the lance surface decreases inversely with the increase in the flow velocity of the gas blown from the outer pipe of the double pipe lance.
  • the surface temperature of a double pipe lance exceeds 880 degreeC
  • creep deformation will occur and a double pipe lance will bend. Therefore, when the steel pipe of 20A schedule 5S is used for the outer pipe of the double pipe lance and the surface temperature of the double pipe lance is 880 ° C. or less, the outlet flow velocity of the outer pipe of the double pipe lance is 20 m / sec or more. .
  • the outlet flow velocity of the outer pipe of the double pipe lance is 20 m / sec or more, the double pipe lance is not deformed or bent.
  • the outlet flow velocity of the outer pipe of the double pipe lance exceeds 120 m / sec, it is not practical in terms of the operating cost of the equipment, so the upper limit of the outlet flow velocity of the outer pipe of the double pipe lance is 120 m / sec. did.
  • the outlet flow velocity may be set to 20 m / sec or more as necessary.
  • the pulverized coal has an average particle diameter of 10 to 100 ⁇ m. However, when ensuring combustibility and considering the supply from the lance and the supply to the lance, it is preferably 20 to 50 ⁇ m. Good. If the average particle size of the pulverized coal is less than 20 ⁇ m, the combustibility is excellent, but the lance is easily clogged during pulverized coal transportation (gas transportation), and if it exceeds 50 ⁇ m, the pulverized coal combustibility may be deteriorated.
  • anthracite coal may be used as the solid reducing material in addition to coal having a volatile content of 25 mass% or less.
  • Anthracite has a volatile content of 3-5 mass%. Therefore, in this invention, the pulverized coal to be used is expressed as pulverized coal having an volatile content of 3 mass% or more and 25 mass% or less including anthracite coal.
  • pulverized coal is mainly used, and waste plastic, waste solid fuel (RDF), organic resources (biomass), waste material, and CDQ dust collecting coke may be used therein.
  • CDQ dust collection coke is coke powder collected by a dry fire extinguisher (CDQ).
  • CDQ dust collection coke is coke powder collected by a dry fire extinguisher (CDQ).
  • CDQ dust collection coke is coke powder collected by a dry fire extinguisher (CDQ).
  • CDQ dust collection coke is coke powder collected by a dry fire extinguisher (CDQ).
  • CDQ dust collection coke is coke powder collected by a dry fire extinguisher (CDQ).
  • CDQ dust collection coke is coke powder collected by a dry fire extinguisher (CDQ).
  • CDQ dust collection coke is coke powder collected by a dry fire extinguisher (CDQ).
  • CDQ dust collection coke is preferably 80 mass% or more.
  • waste plastics, solid waste fuel (RDF), organic resources (biomass), waste materials, etc. have a lower calorific value due to the combustion reaction. Since the substitution efficiency for the solid reducing material is reduced, and the CDQ dust collection coke has a high calorific value, it is difficult to ignite because there is no volatile matter, and the substitution efficiency is reduced, so the proportion of pulverized coal is 80 mass% or more It is preferable that
  • waste plastics, waste solid fuel (RDF), organic resources (biomass), and waste materials can be used with pulverized coal as fine particles of 6 mm or less, preferably 3 mm or less.
  • the CDQ dust collecting coke can be used as it is.
  • the ratio with pulverized coal can be mixed by merging with pulverized coal fed by carrier gas. You may mix and use beforehand with pulverized coal.
  • the lance 4 for injecting fuel from the tuyere 3 is a double pipe, and pulverized coal is injected from the respective inner pipes of the two double pipe lances 4, Oxygen (flammable gas) is blown from the respective outer pipes of the two double-pipe lances 4 so that the oxygen concentration of the gas composed of the carrier gas and the flammable gas conveying pulverized coal is 35 vol% or more.
  • Oxygen flammable gas
  • the oxygen intensity is suppressed by setting the oxygen concentration of the gas composed of the carrier gas for conveying the pulverized coal and the combustion-supporting gas to less than 70 vol%. Can do.
  • the gas balance in the blast furnace is not impaired, and excessive supply of oxygen is avoided.
  • the basic unit of oxygen used can be reduced.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacture Of Iron (AREA)
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PCT/JP2012/055886 2010-12-27 2012-03-01 高炉操業方法 WO2013094229A1 (ja)

Priority Applications (6)

Application Number Priority Date Filing Date Title
CN201280064116.0A CN104039985A (zh) 2011-12-21 2012-03-01 高炉操作方法
KR1020147019597A KR101629122B1 (ko) 2011-12-21 2012-03-01 고로 조업 방법
BR112014015099A BR112014015099B1 (pt) 2010-12-27 2012-03-01 método para operação de um alto-forno
EP12859458.7A EP2796565B1 (en) 2011-12-21 2012-03-01 Blast furnace operation method
IN1257KON2014 IN2014KN01257A (enrdf_load_stackoverflow) 2011-12-21 2012-03-01
AU2012355193A AU2012355193B2 (en) 2011-12-21 2012-03-01 Blast furnace operation method

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JP2011-279955 2011-12-21
JP2011279955A JP5923968B2 (ja) 2010-12-27 2011-12-21 高炉操業方法

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EP (1) EP2796565B1 (enrdf_load_stackoverflow)
KR (1) KR101629122B1 (enrdf_load_stackoverflow)
CN (1) CN104039985A (enrdf_load_stackoverflow)
AU (1) AU2012355193B2 (enrdf_load_stackoverflow)
IN (1) IN2014KN01257A (enrdf_load_stackoverflow)
TW (1) TWI495729B (enrdf_load_stackoverflow)
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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04346610A (ja) * 1991-05-22 1992-12-02 Kawasaki Steel Corp 高炉用微粉炭吹込ランス
JPH062020A (ja) * 1992-06-16 1994-01-11 Kawasaki Steel Corp 高炉への粉体燃料の吹込み方法
JPH06330113A (ja) * 1993-05-25 1994-11-29 Nkk Corp 高炉内への固体燃料吹込み方法
JPH10251715A (ja) 1997-03-14 1998-09-22 Nkk Corp 高炉への微粉炭吹き込み方法
JP2000192119A (ja) 1998-12-25 2000-07-11 Kobe Steel Ltd 高炉への補助燃料吹込み方法
JP2001323307A (ja) * 2000-05-16 2001-11-22 Nkk Corp 高炉への微粉炭吹込み操業方法
JP2002047359A (ja) 2000-08-01 2002-02-12 C I Kasei Co Ltd 抗菌性ポリスチレン系熱収縮フイルム
JP2003286511A (ja) * 2002-03-29 2003-10-10 Nippon Steel Corp 高炉での低揮発分微粉炭の燃焼性向上方法

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06128614A (ja) * 1992-10-14 1994-05-10 Nippon Steel Corp 高炉操業法
KR100431868B1 (ko) 2000-12-13 2004-05-20 주식회사 포스코 미분탄 취입랜스 및 이를 이용한 미분탄 취입방법
JP4292578B2 (ja) 2004-02-26 2009-07-08 Ｊｆｅスチール株式会社 微粉炭吹き込み方法及び装置
JP4997734B2 (ja) * 2004-09-30 2012-08-08 Ｊｆｅスチール株式会社 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
TWI277654B (en) * 2005-01-31 2007-04-01 Jfe Steel Corp Method for operating blast furnace
JP5824811B2 (ja) * 2010-01-19 2015-12-02 Ｊｆｅスチール株式会社 高炉操業方法

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04346610A (ja) * 1991-05-22 1992-12-02 Kawasaki Steel Corp 高炉用微粉炭吹込ランス
JPH062020A (ja) * 1992-06-16 1994-01-11 Kawasaki Steel Corp 高炉への粉体燃料の吹込み方法
JPH06330113A (ja) * 1993-05-25 1994-11-29 Nkk Corp 高炉内への固体燃料吹込み方法
JPH10251715A (ja) 1997-03-14 1998-09-22 Nkk Corp 高炉への微粉炭吹き込み方法
JP2000192119A (ja) 1998-12-25 2000-07-11 Kobe Steel Ltd 高炉への補助燃料吹込み方法
JP2001323307A (ja) * 2000-05-16 2001-11-22 Nkk Corp 高炉への微粉炭吹込み操業方法
JP2002047359A (ja) 2000-08-01 2002-02-12 C I Kasei Co Ltd 抗菌性ポリスチレン系熱収縮フイルム
JP2003286511A (ja) * 2002-03-29 2003-10-10 Nippon Steel Corp 高炉での低揮発分微粉炭の燃焼性向上方法
JP4074467B2 (ja) 2002-03-29 2008-04-09 新日本製鐵株式会社 高炉での低揮発分微粉炭の燃焼性向上方法

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