WO2016031653A1 - Procédé d'injection de charbon pulvérisé dans un haut-fourneau à oxygène - Google Patents

Procédé d'injection de charbon pulvérisé dans un haut-fourneau à oxygène Download PDF

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Publication number
WO2016031653A1
WO2016031653A1 PCT/JP2015/073291 JP2015073291W WO2016031653A1 WO 2016031653 A1 WO2016031653 A1 WO 2016031653A1 JP 2015073291 W JP2015073291 W JP 2015073291W WO 2016031653 A1 WO2016031653 A1 WO 2016031653A1
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WO
WIPO (PCT)
Prior art keywords
pulverized coal
blast furnace
oxygen
gas
oxygen blast
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PCT/JP2015/073291
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English (en)
Japanese (ja)
Inventor
泰平 野内
高橋　功一
光輝 照井
佐藤　道貴
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
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 KR1020187031200A priority Critical patent/KR20180119713A/ko
Priority to KR1020177003784A priority patent/KR102080705B1/ko
Priority to JP2016545460A priority patent/JP6098765B2/ja
Priority to CN201580044897.0A priority patent/CN106661640A/zh
Publication of WO2016031653A1 publication Critical patent/WO2016031653A1/fr

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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
    • 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

Definitions

  • the present invention relates to a method for injecting pulverized coal into an oxygen blast furnace in which pure oxygen and pulverized coal are injected from a tuyere to generate blast furnace gas containing no nitrogen from the top of the furnace.
  • An oxygen blast furnace generally generates and recovers blast furnace gas containing no nitrogen (hereinafter also simply referred to as “nitrogen-less blast furnace gas”) from the top of the furnace by blowing pure oxygen and pulverized coal as a reducing material from the tuyere.
  • nitrogen-less blast furnace gas can be used as a raw material for the synthetic chemical industry.
  • it is necessary to operate the temperature in the combustion region of the tuyere (feather tip temperature) at a high temperature of 2000 ° C. to 2600 ° C.
  • Patent Document 1 proposes a method of controlling the temperature of the tuyere tip within a predetermined temperature range by blowing high-temperature furnace top gas containing CO 2 from the tuyere.
  • Patent Document 2 proposes an operation method in which pure oxygen is preheated to increase the amount of pulverized coal blown (see Patent Document 4).
  • Patent Documents 1 to 3 listed above blown pure oxygen and pulverized coal are used at room temperature.
  • the igniting of the pulverized coal to be injected is accelerated to improve the combustibility.
  • Patent Document 4 proposes a method of preheating with pure oxygen.
  • An object of the present invention is to propose an effective method for efficiently generating nitrogen-less blast furnace gas useful as a synthetic chemical industry gas by using a pulverized coal that is preferable as pulverized coal to be blown into an oxygen blast furnace.
  • the present invention generates a blast furnace gas that does not contain nitrogen by blowing pulverized coal together with pure oxygen from the tuyere and performs the pulverized coal blowing operation on the oxygen blast furnace that is recovered from the top of the furnace.
  • This is a method for injecting pulverized coal into an oxygen blast furnace with a fraction of 25 mass% or more.
  • the present invention further includes (1) Use pure oxygen and pulverized coal blown from the tuyere at room temperature; (2) The volatile content of the pulverized coal is 30 mass% or less, (3) The amount of pulverized coal blown in (PCR) is 200 kg or more per 1 ton of hot metal, It can be considered that a more preferable solution can be provided.
  • the amount of pulverized coal injected can be reduced without a preheating device or its heat source. You can increase it.
  • the temperature in the combustion area before the tuyere of the oxygen blast furnace can be easily and quickly increased.
  • nitrogen-free blast furnace gas can be efficiently generated and recovered, which leads to stable supply of synthetic chemical industry gas.
  • FIG. 1 is a diagram showing an example of an oxygen blast furnace and its peripheral equipment used in the pulverized coal blowing method according to the present invention.
  • 1 is an oxygen blast furnace
  • 2 is a mixer for mixing coke oven gas (C gas) and blast furnace gas (B gas) to obtain a mixed gas (M gas)
  • 3 is the above M Burner for preheating gas and blowing it into the furnace
  • 4 is a generator for generating electricity using blast furnace top exhaust gas
  • 5 is an oxygen plant for producing pure oxygen
  • 6 is for blowing oxygen or the like into the oxygen blast furnace 1 The tuyere to use.
  • One of the features of the pulverized coal blowing method into the oxygen blast furnace according to the present invention is that the volatile content of the pulverized coal blown together with pure oxygen from the tuyere is 25 mass% or more. The reason is as follows.
  • oxygen blast furnaces generally have no equipment or heat source for preheating oxygen. Therefore, normal oxygen and pulverized coal are used. Therefore, in the case of this furnace, pulverized coal passing through the raceway (the tuyere tip combustion zone, the temperature is maintained at a high temperature of 2000 ° C. or higher and the diameter is about 1 m) in which the coke is swirling. If the air is blown at a speed of 200 m / s, the time required to pass this raceway is several milliseconds. Therefore, it is preferable that the pulverized coal is ignited as early as possible before entering the raceway.
  • the reason why the volatile content is limited to 25 mass% or more is that, as can be seen from the examples described later, early ignition-combustion of pulverized coal can be achieved and a high replacement rate can be obtained.
  • the reason why it is preferable to set the volatile content to 30 mass% or less is that the substitution rate is still higher than that of the conventional blast furnace as shown in the examples to be described later. It is for showing.
  • the high volatile matter pulverized coal is, for example, mixed with a predetermined amount of a relatively low volatile matter pulverized coal from North America and a relatively high volatile matter pulverized coal such as from Australia or the United States.
  • a component prepared at a fraction of 25 mass% or more, preferably about 30 mass% or less is used.
  • FIG. 2 is a diagram showing an example of a pulverized coal combustion test furnace for measuring the combustion rate of pulverized coal under conditions of injecting pure oxygen and pulverized coal into an oxygen blast furnace.
  • This pulverized coal combustion test furnace 11 is 1400 mm high ⁇ 1000 mm long ⁇ 400 mm wide.
  • a cyclone 13 is provided on the upper part of the pulverized coal combustion test furnace 11 via a pipe 12, and combustion gas generated in the furnace is separated into exhaust gas and dust by the cyclone 13.
  • An upper part of the test furnace 11 has a pipe line 14 connected to the coke storage tank 15 so that the coke 16 stored in the coke storage tank 15 can be loaded into the test furnace 11. It has become.
  • test furnace 11 is provided with a measurement probe 17 for measuring temperature, pressure, gas composition, and the like on the side surface thereof, and a tuyere 18 is provided on the side of the furnace substantially opposite to the measurement probe 17. Further, the tuyere 18 is provided with a blow pipe 19.
  • the blow pipe 19 is provided with a pure oxygen blowing lance 20 for blowing pure oxygen, a pulverized coal blowing lance 21 for blowing pulverized coal, an observation hole 22 and the like.
  • Reference numeral 23 denotes a raceway which is a combustion zone in front of the tuyere 18.
  • the pulverized coal combustion test furnace 11 was used to measure the combustion rate of pulverized coal simulating the blowing conditions of an oxygen blast furnace.
  • this combustion test equipment that reproduces an oxygen blast furnace, it is difficult to measure the combustion rate by direct sampling of pulverized coal because of the high temperature, so (coke consumption / pulverized coal injection amount) is defined as the substitution rate, and pulverized coal
  • the burning rate of was measured indirectly.
  • the pulverized coal combustion rate decreases, the residual oxygen increases and the coke consumption increases, so the replacement rate decreases.
  • the temperature of the blown gas is 1000 ° C., which is the same as that in the conventional blast furnace, and the room temperature in the oxygen blast furnace according to the present invention.
  • the amount of pulverized coal (PCR) is the same as that in the conventional blast furnace.
  • the oxygen blast furnace condition according to the invention was set to an amount corresponding to 150 kg per 1 ton of hot metal. In the conventional blast furnace conditions, the oxygen concentration in the pulverized coal blowing gas was 25%, and in the oxygen blast furnace conditions according to the present invention, the pulverized coal blowing gas was 100% oxygen gas.
  • FIG. 3 shows the experimental results. From the result shown in this figure, in the example of the conventional normal blast furnace, the substitution rate decreases as the volatile content increases at a volatile content of 15 mass% or more. This is because the amount of carbon in the pulverized coal is relatively reduced by the increase in the volatile content. Although pulverized coal is less expensive than equal-weight coke, the low substitution rate has low cost merit, and the reducing material ratio, which is the sum of the coke ratio and pulverized coal ratio, is increased. In particular, it is not preferred because it increases CO 2 emissions.
  • the substitution rate gradually increases when the volatile content is 15 mass% or more, and exceeds the substitution rate of the conventional blast furnace operation example at 25 mass% or more.
  • the volatile content is 25 to 30 mass%, an almost constant good substitution rate is shown, but when it exceeds 30 mass%, it is better than the substitution rate of the conventional example, but the substitution rate is slightly lowered.
  • the reason for this is thought to be that in blast furnaces, pulverized coal should naturally burn easily in pure oxygen, but low volatile pulverized coal is ignited late at room temperature, resulting in a lower substitution rate.
  • the high volatile matter as in the present invention even if it is used at room temperature, the volatile matter becomes an ignition source, so that the substitution rate is increased because it is ignited early.
  • FIG. 4 shows the experimental results when both the conventional blast furnace conditions and the oxygen blast furnace conditions according to the present invention have an amount of pulverized coal injection (PCR) equivalent to 200 kg per 1 ton of hot metal.
  • PCR pulverized coal injection
  • pulverized coal having a higher volatile content particularly pulverized coal having a volatile content of 25 mass% or more as the blown pulverized coal. I was able to confirm.
  • the pulverized coal blowing method according to the present invention described above is not only an oxygen blast furnace using high volatile pulverized coal having a volatile content of 25 mass% or more as pulverized coal, but also a nitrogen-less blast furnace gas useful as a synthetic chemical industry gas.
  • the present invention can be applied to various uses that require technology for promoting the occurrence.

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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)

Abstract

[Problème] Décrire un procédé efficace, ledit procédé comprenant l'injection d'un charbon pulvérisé ayant des propriétés préférées dans un haut-fourneau à oxygène et ainsi, générer efficacement un gaz de haut-fourneau sans azote qui est utile en tant que gaz pour l'industrie chimique de synthèse. [Solution] Dans l'exécution d'une opération de l'injection d'un charbon pulvérisé dans un haut-fourneau à oxygène, ladite opération comprenant l'injection de charbon pulvérisé dans une tuyère, conjointement avec de l'oxygène pur, et ensuite la collecte d'un gaz de haut-fourneau sans azote généré ainsi depuis le sommet d'un four, la teneur en matière volatile du charbon pulvérisé est ajustée à 25 % en masse ou plus.
PCT/JP2015/073291 2014-08-27 2015-08-20 Procédé d'injection de charbon pulvérisé dans un haut-fourneau à oxygène WO2016031653A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
KR1020187031200A KR20180119713A (ko) 2014-08-27 2015-08-20 산소 고로로의 미분탄 취입 방법
KR1020177003784A KR102080705B1 (ko) 2014-08-27 2015-08-20 산소 고로로의 미분탄 취입 방법
JP2016545460A JP6098765B2 (ja) 2014-08-27 2015-08-20 酸素高炉への微粉炭吹き込み方法
CN201580044897.0A CN106661640A (zh) 2014-08-27 2015-08-20 向氧气高炉吹入粉煤的方法

Applications Claiming Priority (2)

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JP2014172159 2014-08-27
JP2014-172159 2014-08-27

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WO2016031653A1 true WO2016031653A1 (fr) 2016-03-03

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JP (1) JP6098765B2 (fr)
KR (2) KR20180119713A (fr)
CN (1) CN106661640A (fr)
WO (1) WO2016031653A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3438290A4 (fr) * 2016-03-29 2019-03-13 JFE Steel Corporation Procédé de fonctionnement d'un haut-fourneau
JP2019131884A (ja) * 2018-01-31 2019-08-08 Ｊｆｅスチール株式会社 酸素高炉設備およびその酸素高炉設備を用いた銑鉄の製造方法
CN115948626A (zh) * 2023-03-13 2023-04-11 河北三石节能环保科技有限公司 一种高炉喷煤热补偿装置

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1981002584A1 (fr) * 1980-03-11 1981-09-17 R Jordan Poussieres fines de carbone dans un haut fourneau alimente en oxygene
JPS6227509A (ja) * 1985-07-26 1987-02-05 Nippon Kokan Kk <Nkk> 高炉操業方法
JPH11199907A (ja) * 1997-10-29 1999-07-27 Praxair Technol Inc 高温酸素高炉インジェクションシステム

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60159104A (ja) 1984-01-27 1985-08-20 Nippon Kokan Kk <Nkk> 高炉操業方法
JPS63166914A (ja) 1986-12-27 1988-07-11 Nkk Corp 高酸素富化送風高炉
JPS63169310A (ja) 1987-01-06 1988-07-13 Nkk Corp 高炉操業法
JPS63171807A (ja) 1987-01-09 1988-07-15 Nkk Corp 酸素高炉の操業方法
KR960013604B1 (ko) * 1993-12-29 1996-10-09 조말수 고로취입용 혼합미분탄 제조방법
CN1031000C (zh) * 1994-05-31 1996-02-14 高征铠 氧气煤粉熔剂风口复合喷吹高炉炼铁工艺
CN1434132A (zh) * 2003-02-21 2003-08-06 钢铁研究总院 整体高炉联合循环方法
JP5522325B1 (ja) 2012-07-03 2014-06-18 Ｊｆｅスチール株式会社 高炉操業方法
JP6747834B2 (ja) * 2016-03-15 2020-08-26 株式会社Ｓｕｂａｒｕ ステータ

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1981002584A1 (fr) * 1980-03-11 1981-09-17 R Jordan Poussieres fines de carbone dans un haut fourneau alimente en oxygene
JPS6227509A (ja) * 1985-07-26 1987-02-05 Nippon Kokan Kk <Nkk> 高炉操業方法
JPH11199907A (ja) * 1997-10-29 1999-07-27 Praxair Technol Inc 高温酸素高炉インジェクションシステム

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
YOTARO ONO ET AL.: "Development of Oxygen Blast Furnace Process with Preheating Gas Injection into Upper Shaft", JOURNAL OF THE IRON & STEEL INSTITUTE OF JAPAN, vol. 75, no. 8, 1 August 1989 (1989-08-01), pages 1278 - 1285, ISSN: 0021-1575 *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3438290A4 (fr) * 2016-03-29 2019-03-13 JFE Steel Corporation Procédé de fonctionnement d'un haut-fourneau
US11041220B2 (en) 2016-03-29 2021-06-22 Jfe Steel Corporation Blast furnace operation method
JP2019131884A (ja) * 2018-01-31 2019-08-08 Ｊｆｅスチール株式会社 酸素高炉設備およびその酸素高炉設備を用いた銑鉄の製造方法
CN115948626A (zh) * 2023-03-13 2023-04-11 河北三石节能环保科技有限公司 一种高炉喷煤热补偿装置

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CN106661640A (zh) 2017-05-10
JP6098765B2 (ja) 2017-03-22
KR20170029003A (ko) 2017-03-14
KR102080705B1 (ko) 2020-02-24
KR20180119713A (ko) 2018-11-02
JPWO2016031653A1 (ja) 2017-04-27

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