US20150176096A1 - Method for producing pig iron, and blast furnace to be used therefor - Google Patents

Method for producing pig iron, and blast furnace to be used therefor Download PDF

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Publication number
US20150176096A1
US20150176096A1 US14/413,879 US201314413879A US2015176096A1 US 20150176096 A1 US20150176096 A1 US 20150176096A1 US 201314413879 A US201314413879 A US 201314413879A US 2015176096 A1 US2015176096 A1 US 2015176096A1
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Prior art keywords
blast
furnace
coal
injecting
furnace body
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Abandoned
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US14/413,879
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English (en)
Inventor
Setsuo Omoto
Keiichi Nakagawa
Tsutomu Hamada
Masakazu Sakaguchi
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Mitsubishi Heavy Industries Ltd
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Mitsubishi Heavy Industries Ltd
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Assigned to MITSUBISHI HEAVY INDUSTRIES, LTD. reassignment MITSUBISHI HEAVY INDUSTRIES, LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: HAMADA, TSUTOMU, NAKAGAWA, KEIICHI, OMOTO, SETSUO, SAKAGUCHI, MASAKAZU
Publication of US20150176096A1 publication Critical patent/US20150176096A1/en
Abandoned legal-status Critical Current

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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
    • C21B5/00—Making pig-iron in the blast furnace
    • C21B5/008—Composition or distribution of the charge
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B7/00—Blast furnaces
    • 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
    • C21B7/00—Blast furnaces
    • C21B7/16—Tuyéres
    • C21B7/163—Blowpipe assembly

Definitions

  • the present invention relates to a method for producing pig iron and a blast furnace to be used therefor.
  • Pig iron is produced from iron ore in a blast furnace by feeding the materials of iron ore, calcium oxide, and coke into the blast-furnace body from the top thereof, and blowing in hot air and blast-furnace-injecting coal (pulverized coal) from a tuyere in a lower portion of the side of the blast-furnace body.
  • Patent Document 1 Japanese Unexamined Patent Application Publication No. H05-156330A
  • Patent Document 2 Japanese Unexamined Patent Application Publication No. H11-152508A
  • the present invention has been devised to solve the above problems, and it is an object of the present invention to provide a method for producing pig iron and a blast furnace to be used therefor capable of suppressing the adhesion of blast-furnace-injecting-coal ash to the path of blast-furnace-injecting coal into the blast-furnace body and blockage by the blast-furnace-injecting-coal ash, and reducing the cost of producing pig iron.
  • the method of producing pig iron according to a first invention that solves the above problem is a pig iron producing method for producing pig iron from material iron ore by feeding material that includes iron ore and coal into a blast-furnace body from the top thereof, and blowing hot air and blast-furnace-injecting coal into the blast-furnace body from a tuyere, wherein the blast-furnace-injecting coal has an oxygen atom content (dry base) of from 10 wt % to 20 wt % and an average pore diameter of from 10 nm to 50 nm, the melting point of the ash in the blast-furnace-injecting coal is measured in advance, and the temperature of the hot air is adjusted to a temperature 100 to 150° C. lower than the melting point of the ash.
  • the method of producing pig iron according to a second invention that solves the above problem is the pig iron producing method according to the first invention in which the hot air is enriched with oxygen at the tuyere of the blast-furnace body.
  • the blast furnace according to a third invention that solves the above problem includes: a blast-furnace body; material-insertion means for feeding material that includes iron ore and coal into the blast-furnace body from the top thereof; hot-air blowing means for blowing hot air into the interior from a tuyere of the blast-furnace body; and blast-furnace-injecting-coal supply means for blowing blast-furnace-injecting coal into the interior from the tuyere of the blast-furnace body, wherein the blast-furnace-injecting-coal supply means blows in blast-furnace-injecting coal with an oxygen atom content (dry base) of 10 to 20 wt % and an average pore diameter of 10 to 50 nm, and the hot-air blowing means measures the melting point of the ash in the material in advance, and blows in hot air that is 100 to 150° C. lower than the melting point of the ash.
  • the blast furnace according to a fourth invention that solves the above problem is the blast furnace according to the third invention, further comprising oxygen enrichment means for enriching the oxygen of the hot air in the tuyere of the blast-furnace body.
  • the blast furnace according to a fifth invention that solves the above problem is the blast furnace according to the fourth invention, wherein the oxygen enrichment means includes an injection lance to which oxygen flows, and the tip end of the injection lance is disposed further toward the inside of the blast-furnace body than the base end side of the tuyere of the blast-furnace body.
  • blast-furnace-injecting coal has an oxygen atom content (dry base) of 10 to 20 wt % and an average pore diameter of 10 to 50 nm, in other words, blast-furnace-injecting coal with greatly suppressed decomposition (reduction) of the main structure (combustible components that mainly include C, H, and O) although tar producing groups such as oxygen-containing groups (carboxyl group, aldehyde group, ester group, hydroxyl group, or the like) or the like have been separated or greatly reduced is blown into the blast-furnace body together with hot air whose temperature has been adjusted to 100 to 150° C.
  • oxygen-containing groups carboxyl group, aldehyde group, ester group, hydroxyl group, or the like
  • the blast furnace can be stably operated.
  • blast-furnace-injecting coal is blown into the blast-furnace body together with the hot air without melting the ash in the blast-furnace-injecting coal
  • low cost low grade coal such as subbituminous coal or lignite or the like can be used as the blast-furnace-injecting coal, and it is possible to reduce the cost of producing pig iron.
  • FIG. 1 is a schematic view of the configuration of a first embodiment of the blast furnace according to the present invention.
  • FIG. 2 is a schematic view of the configuration of a second embodiment of the blast furnace according to the present invention.
  • FIG. 3 is an enlarged view of a main part of FIG. 2 .
  • a material quantitative supply device 111 that supplies a fixed quantity of material 1 that includes iron ore and coke is connected to the upstream side in the feeding direction of a feeding conveyor 112 that conveys the material 1 .
  • the downstream side in the feeding direction of the feeding conveyor 112 is connected to the top of a furnace top hopper 113 on the top of a blast-furnace body 110 .
  • a hot air supply device 116 that supplies hot air 101 is connected to a blow pipe 117 provided on a tuyere 118 of the blast-furnace body 110 .
  • a supply hopper 120 that supplies blast-furnace-injecting coal 11 is installed near the blast-furnace body 110 .
  • the blast-furnace-injecting coal 11 contains from 10 to 18 wt % of oxygen atoms (dry base), and has an average pore diameter of from 10 to 50 nm (preferably from 20 to 50 nm).
  • the blast-furnace-injecting coal 11 can be easily produced by removing moisture from low grade coal (atomic oxygen content (dry base): 18 wt % or higher, and average pore diameter: from 3 to 4 nm) such as subbituminous coal, lignite, or the like, which normally has a low ash melting point (for example, 1200° C.) by heating it (from 110° C. to 200° C.
  • low grade coal atomic oxygen content (dry base): 18 wt % or higher, and average pore diameter: from 3 to 4 nm
  • subbituminous coal, lignite, or the like which normally has a low ash melting point (for example, 1200° C.) by heating it (from 110° C. to 200° C.
  • the bottom of the supply hopper 120 is connected to the base end side of a belt conveyor 121 that transports the blast-furnace-injecting coal 11 from within the supply hopper 120 .
  • the tip end side of the belt conveyor 121 is connected to the top of a receiving hopper 122 that receives the blast-furnace-injecting coal 11 .
  • the bottom of the receiving hopper 122 is connected to an inlet at the top of a coal mill 123 that pulverizes the blast-furnace-injecting coal 11 from the receiving hopper 122 to a predetermined diameter size (for example, 80 ⁇ m or less).
  • a nitrogen gas supply source 124 that supplies inert nitrogen gas 102 is connected to the lower portion of the side of the coal mill 123 .
  • the base end side of a transport line 125 that gaseously transports the pulverized blast-furnace-injecting coal 11 by the nitrogen gas 102 is connected to the top of the coal mill 123 .
  • the tip end side of the transport line 125 is connected to a cyclone separator (or bag filter) 126 that separates the blast-furnace-injecting coal 11 and the nitrogen gas 102 .
  • the bottom of the cyclone separator 126 is connected to the top of a storage hopper 127 that stores the blast-furnace-injecting coal 11 .
  • the bottom of the storage hopper 127 is connected to the top of an injection tank 128 .
  • the nitrogen gas supply source 124 is connected to the lower part of the side of the injection tank 128 .
  • the top of the injection tank 128 is connected to an injection lance 129 that is connected to the blow pipe 117 , and by supplying the nitrogen gas 102 from the nitrogen gas supply source 124 into the injection tank 128 , the blast-furnace-injecting coal 11 that has been supplied into the injection tank 128 is gaseously transported and supplied into the blow pipe 117 from the injection lance 129 .
  • a hot air temperature control device 115 is connected to the hot air supply device 116 .
  • a hot air supply source 114 is connected to the hot air temperature control device 115 .
  • the hot air temperature control device 115 adjusts the hot air supplied from the hot air supply source 114 to a temperature 100 to 150° C. lower than the melting point of the ash, based on the melting point of the ash (blast-furnace-injecting-coal ash) of the blast-furnace-injecting coal 11 obtained by measuring in advance the melting point of the ash (blast-furnace-injecting-coal ash) of the blast-furnace-injecting coal 11 .
  • the hot air temperature control device 115 adjusts the hot air to, for example, from 1050 to 1100° C. when the melting point of the ash (blast-furnace-injecting-coal ash) of the blast-furnace-injecting coal 11 is 1200° C.
  • 110 a is a taphole for extracting the molten pig iron (hot metal) 2 .
  • material-insertion means is configured from the material quantitative supply device 111 , the feeding conveyor 112 , the furnace top hopper 113 , and the like
  • hot-air blowing means is configured from the hot air supply source 114 , the hot air temperature control device 115 , the hot air supply device 116 , the blow pipe 117 , and the like
  • blast-furnace-injecting-coal supply means is configured from the supply hopper 120 , the belt conveyor 121 , the receiving hopper 122 , the coal mill 123 , the nitrogen gas supply source 124 , the transport line 125 , the cyclone separator 126 , the storage hopper 127 , the injection tank 128 , the injection lance 129 , the blow pipe 117 , and the like
  • Hot air temperature control means is configured from the hot air temperature control device 115 , and the like.
  • the melting point of the ash (blast-furnace-injecting-coal ash) of the blast-furnace-injecting coal 11 is measured in advance.
  • the material 1 is supplied into the furnace top hopper 113 by the feeding conveyor 112 and fed into the blast-furnace body 110 .
  • the blast-furnace-injecting coal 11 is fed into the supply hopper 120 , the blast-furnace-injecting coal 11 is supplied to the receiving hopper 122 via the belt conveyor 121 , and pulverized to a predetermined diameter size (for example, 80 ⁇ m or less) by the coal mill 123 .
  • a predetermined diameter size for example, 80 ⁇ m or less
  • the nitrogen gas 102 gaseously transports the pulverized blast-furnace-injecting coal 11 into the cyclone separator 126 via the transport line 125 , and after separation from the blast-furnace-injecting coal 11 is discharged to the outside the system.
  • the blast-furnace-injecting coal 11 that is separated in the cyclone separator 126 is supplied into the injection tank 128 , and is gaseously transported to the injection lance 129 by the nitrogen gas 102 from the nitrogen gas supply source 124 , and supplied into the blow pipe 117 .
  • the hot air 101 which has been adjusted to a temperature of 100 to 150° C. lower than the melting point of the ash (blast-furnace-injecting-coal ash) of the blast-furnace-injecting coal 11 is supplied at a gas flow velocity of, for example, 240 m/s from the hot air supply device 116 to the blow pipe 117 , so the blast-furnace-injecting coal 11 is preheated and ignites, generating flames at the tip of the blow pipe 117 and combustion in the raceway, reacting with the coke and the like in the material 1 within the blast-furnace body 110 and generating a reducing gas.
  • the iron ore in the material 1 is reduced to pig iron (hot metal) 2 and extracted from the taphole 110 a.
  • the oxygen gas concentration of the hot air 101 is adjusted to, for example, 28%.
  • the blast-furnace-injecting coal 11 as described above has an average pore diameter of from 10 to 50 nm, in other words, even though tar generating groups such as oxygen-containing functional groups (carboxyl group, aldehyde group, ester group, hydroxyl group, and the like) are separated or greatly reduced, the atomic oxygen content (dry base) is from 10 to 18 wt %, in other words, decomposition (reduction) of the main structure (combustion components containing mainly C, H, and O) has been greatly suppressed.
  • tar generating groups such as oxygen-containing functional groups (carboxyl group, aldehyde group, ester group, hydroxyl group, and the like)
  • the atomic oxygen content (dry base) is from 10 to 18 wt %, in other words, decomposition (reduction) of the main structure (combustion components containing mainly C, H, and O) has been greatly suppressed.
  • the melting point of the ash in the blast-furnace-injecting coal 11 is measured in advance, and the hot air 101 100 to 150° C. lower than the melting point of the ash is supplied to the blow pipe 117 , so the ash (blast-furnace-injecting-coal ash) of the blast-furnace-injecting coal 11 does not melt and adhere to the inner surfaces of the injection lance 129 and the tuyere 118 .
  • the blast-furnace-injecting coal 11 has an average pore diameter of from 10 to 50 nm (preferably, from 20 to 50 nm). This is because if the diameter is less than 10 nm, the ease of diffusion of the oxygen of the hot air 101 into the interior is reduced, which causes the combustibility to be reduced, and if the diameter exceeds 50 nm, the coal can easily become split fine particulate, and if it becomes split fine particulate when it is blown into the blast-furnace body 110 , it passes through the interior of the blast-furnace body 110 on the gas flow without being burned, and is discharged.
  • the atomic oxygen content dry base
  • the oxygen content is less than 10 wt %, it is difficult to obtain complete combustion without containing the oxidizing agent or oxygen enrichment of the hot air.
  • the dry distillation temperature be from 460 to 590° C. (preferably, from 500 to 550° C.). This is because when the temperature is less than 460° C., it is not possible to sufficiently separate tar generating groups such as oxygen-containing functional groups from the low grade coal, and it is very difficult to obtain an average pore diameter of from 10 to 50 nm, and if the temperature exceeds 590° C., the main structure of the low grade coal (combustion components containing mainly C, H, and O) start to decompose significantly, and the combustible components are reduced too much.
  • a blast furnace 200 includes an injection lance 214 for oxygen enrichment provided connected to the blow pipe 117 .
  • the base end of the injection lance 214 for oxygen enrichment is connected to an oxygen gas supply device 213 .
  • the oxygen gas supply device 213 is connected to an oxygen gas temperature control device 212 .
  • the oxygen gas temperature control device 212 is connected to an oxygen gas supply source 211
  • the tip end 214 a of the injection lance 214 for oxygen enrichment is located further toward the inside of the blast-furnace body 110 than the base end 118 a of the tuyere 118 of the blast-furnace body 110 .
  • the hot air 101 near to the tuyere 118 of the blast-furnace body 110 can be enriched with oxygen, and it is possible to delay the time for commencement of combustion of the blast-furnace-injecting coal 11 .
  • oxygen enrichment means is configured from the oxygen gas supply source 211 , the oxygen gas temperature control device 212 , the oxygen gas supply device 213 , the injection lance 214 for oxygen enrichment, and the like.
  • the melting point of the ash (blast-furnace-injecting-coal ash) of the blast-furnace-injecting coal 11 is measured in advance.
  • the blast-furnace-injecting coal 11 is supplied to the injection tank 128 via the supply hopper 120 , the belt conveyor 121 the receiving hopper 122 , the coal mill 123 , the cyclone separator 126 , and the storage hopper 127 , in the same way as described in the embodiment previously described, and is gaseously transported to the injection lance 129 by the nitrogen gas 102 from the nitrogen gas supply source 124 , and supplied into the blow pipe 117 .
  • the hot air 101 from the hot air supply source 114 is adjusted to a temperature 100 to 150° C. lower than the melting point of the ash (blast-furnace-injecting-coal ash) of the blast-furnace-injecting coal 11 by the hot air temperature control device 115 , and supplied to the blow pipe 117 by the hot air supply device 116 at, for example, a gas flow velocity of 240 m/s, oxygen gas 103 from the oxygen gas supply source 211 is adjusted to the same temperature as the hot air 101 by the oxygen gas temperature control device 212 , and supplied to the blow pipe 117 via the injection lance 214 for oxygen enrichment by the oxygen gas supply device 213 .
  • the blast-furnace-injecting coal 11 is preheated and ignited, flames occur at the tip of the blow pipe 117 , combustion occurs within the raceway, a reaction occurs with the coke and the like in the material 1 within the blast-furnace body 110 , and reducing gas is generated.
  • the iron ore in the material 1 is reduced to pig iron (hot metal) 2 and extracted from the taphole 110 a.
  • the total of the oxygen concentration of the hot air 101 and the oxygen concentration of the oxygen gas is adjusted to, for example, 28%.
  • the melting point of the ash in the blast-furnace-injecting coal 11 is measured in advance, and the hot air 101 100 to 150° C. lower than the melting point of the ash is supplied to the blow pipe 117 , so the ash (blast-furnace-injecting-coal ash) of the blast-furnace-injecting coal 11 does not melt and adhere to the inner surfaces of the injection lance 129 and the tuyere 118 .
  • the blast furnace 200 can be operated stably.
  • the injection lance 214 for oxygen enrichment is provided in the blow pipe 117 , so compared with the embodiment as described above in which hot air 101 only is supplied to the blow pipe 117 , the oxygen concentration of the hot air 101 is lower, and it is possible to enrich the oxygen by that amount by the injection lance 214 for oxygen enrichment, so it is possible to delay the start of combustion of the blast-furnace-injecting coal 11 . Therefore, it is possible to more reliably suppress adhesion of blast-furnace-injecting-coal ash to the path of the blast-furnace-injecting coal into the blast-furnace body and blockage due to the blast-furnace-injecting-coal ash.
  • the method for producing pig iron and the blast furnace to be used therefor according to the present invention are capable of suppressing the adhesion of blast-furnace-injecting-coal ash to the path of blast-furnace-injecting coal into the blast-furnace body and blockage due to the blast-furnace-injecting-coal ash, and reducing the cost of producing pig iron, so they are extremely useful in iron manufacturing industry.

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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)
  • Blast Furnaces (AREA)
US14/413,879 2012-08-13 2013-04-25 Method for producing pig iron, and blast furnace to be used therefor Abandoned US20150176096A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2012-179239 2012-08-13
JP2012179239A JP5958935B2 (ja) 2012-08-13 2012-08-13 銑鉄製造方法およびこれに使用する高炉設備
PCT/JP2013/062157 WO2014027481A1 (ja) 2012-08-13 2013-04-25 銑鉄製造方法およびこれに使用する高炉設備

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US20150176096A1 true US20150176096A1 (en) 2015-06-25

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US14/413,879 Abandoned US20150176096A1 (en) 2012-08-13 2013-04-25 Method for producing pig iron, and blast furnace to be used therefor

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US (1) US20150176096A1 (enrdf_load_stackoverflow)
JP (1) JP5958935B2 (enrdf_load_stackoverflow)
KR (1) KR101648683B1 (enrdf_load_stackoverflow)
CN (1) CN104411837B (enrdf_load_stackoverflow)
IN (1) IN2015DN00505A (enrdf_load_stackoverflow)
WO (1) WO2014027481A1 (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20150008626A1 (en) * 2012-01-18 2015-01-08 Mitsubishi Heavy Industries, Ltd. Blast furnace

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3165302A (en) * 1960-03-21 1965-01-12 Joy Mfg Co Apparatus for heating blast furnace feed gas
US6090182A (en) * 1997-10-29 2000-07-18 Praxair Technology, Inc. Hot oxygen blast furnace injection system
US6875316B1 (en) * 1999-10-20 2005-04-05 Jfe Steel Corporation High reactivity and high strength coke for blast furnace and method for producing the same
JP2006028538A (ja) * 2004-07-12 2006-02-02 Sumitomo Metal Ind Ltd 高温被還元性に優れた焼結鉱を使用する高炉の操業方法
US20060108721A1 (en) * 2004-11-19 2006-05-25 Lew Holdings, Llc Single vessel blast furnace and steel making/gasifying apparatus and process
JP2010095711A (ja) * 2008-09-16 2010-04-30 Nippon Steel Corp 高反応性小塊コークスとその製造方法
KR20120074544A (ko) * 2010-12-28 2012-07-06 주식회사 포스코 연소실의 연소 제어방법

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05156330A (ja) 1991-12-04 1993-06-22 Sumitomo Metal Ind Ltd 高炉羽口微粉炭吹き込み方法
JPH09263807A (ja) * 1996-03-27 1997-10-07 Nisshin Steel Co Ltd 高炉への微粉炭吹き込み方法
JPH1152508A (ja) 1997-07-29 1999-02-26 Fuji Photo Film Co Ltd ハロゲン化銀感光材料
JP5273166B2 (ja) * 2000-08-10 2013-08-28 Ｊｆｅスチール株式会社 微粉炭の多量吹込みによる高炉操業方法
CN1269971C (zh) * 2004-04-09 2006-08-16 刘仁生 用于高炉喷吹的贫瘦煤的优化处理方法
JP2007169750A (ja) * 2005-12-26 2007-07-05 Jfe Steel Kk 高炉操業方法
JP4933925B2 (ja) * 2007-03-20 2012-05-16 株式会社神戸製鋼所 粉体複合吹き込み高炉操業方法
CN101476003B (zh) * 2009-02-06 2011-05-04 杨子毅 碱性高炉喷吹煤基直接还原剂及其生产方法
US8999033B2 (en) * 2010-12-15 2015-04-07 Midrex Technologies, Inc. Method and system for producing direct reduced iron and/or hot metal using brown coal
CN102269757B (zh) * 2011-06-30 2014-06-18 首钢总公司 喷吹煤综合性能评价方法

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3165302A (en) * 1960-03-21 1965-01-12 Joy Mfg Co Apparatus for heating blast furnace feed gas
US6090182A (en) * 1997-10-29 2000-07-18 Praxair Technology, Inc. Hot oxygen blast furnace injection system
US6875316B1 (en) * 1999-10-20 2005-04-05 Jfe Steel Corporation High reactivity and high strength coke for blast furnace and method for producing the same
JP2006028538A (ja) * 2004-07-12 2006-02-02 Sumitomo Metal Ind Ltd 高温被還元性に優れた焼結鉱を使用する高炉の操業方法
US20060108721A1 (en) * 2004-11-19 2006-05-25 Lew Holdings, Llc Single vessel blast furnace and steel making/gasifying apparatus and process
JP2010095711A (ja) * 2008-09-16 2010-04-30 Nippon Steel Corp 高反応性小塊コークスとその製造方法
KR20120074544A (ko) * 2010-12-28 2012-07-06 주식회사 포스코 연소실의 연소 제어방법

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Kim, Chang-O. KR 20120074544 A published 07-2012 as application number 10-2010-0136411. Machine translation. *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20150008626A1 (en) * 2012-01-18 2015-01-08 Mitsubishi Heavy Industries, Ltd. Blast furnace
US9556497B2 (en) * 2012-01-18 2017-01-31 Mitsubishi Heavy Industries, Ltd. Blast furnace

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KR20150020248A (ko) 2015-02-25
JP2014037559A (ja) 2014-02-27
CN104411837B (zh) 2016-05-18
KR101648683B1 (ko) 2016-08-16
WO2014027481A1 (ja) 2014-02-20
CN104411837A (zh) 2015-03-11
IN2015DN00505A (enrdf_load_stackoverflow) 2015-06-26
JP5958935B2 (ja) 2016-08-02

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