JPS62222006A - Method for feeding and conveying powder to be blown into blast furnace - Google Patents
Method for feeding and conveying powder to be blown into blast furnaceInfo
- Publication number
- JPS62222006A JPS62222006A JP6356886A JP6356886A JPS62222006A JP S62222006 A JPS62222006 A JP S62222006A JP 6356886 A JP6356886 A JP 6356886A JP 6356886 A JP6356886 A JP 6356886A JP S62222006 A JPS62222006 A JP S62222006A
- Authority
- JP
- Japan
- Prior art keywords
- blast furnace
- pulverized coal
- gas
- pressure
- gas pipe
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000000843 powder Substances 0.000 title claims abstract description 24
- 238000000034 method Methods 0.000 title claims description 10
- 239000012530 fluid Substances 0.000 claims abstract description 17
- 238000005520 cutting process Methods 0.000 claims description 21
- 239000007789 gas Substances 0.000 abstract description 52
- 239000003245 coal Substances 0.000 abstract description 39
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 abstract description 20
- 239000000428 dust Substances 0.000 abstract description 12
- 238000007664 blowing Methods 0.000 abstract description 4
- 229910052757 nitrogen Inorganic materials 0.000 abstract description 4
- 238000012423 maintenance Methods 0.000 abstract description 3
- 229910001873 dinitrogen Inorganic materials 0.000 description 12
- 230000032258 transport Effects 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 5
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 4
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 3
- 239000002173 cutting fluid Substances 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 230000001590 oxidative effect Effects 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002090 carbon oxide Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- RAQDACVRFCEPDA-UHFFFAOYSA-L ferrous carbonate Chemical compound [Fe+2].[O-]C([O-])=O RAQDACVRFCEPDA-UHFFFAOYSA-L 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
この発ＯＡは高炉への吹込み粉体の切出し搬送方法に関
するものである。DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) This OA relates to a method for cutting and conveying blown powder into a blast furnace.
（従来の技術）
近年、高炉の羽口から微粉炭、酸化鉄等を炉内へ吹込み
、省エネルギー、省コストを計ることが行われるように
なってきた。(Prior Art) In recent years, pulverized coal, iron oxide, etc. have been injected into the blast furnace through the tuyere to save energy and cost.
しかしながら、微粉炭酸化鉄等の粉体を高炉羽口から炉
内へ吹込む場合、炉内圧よりも高圧の搬送流体が必要で
あシ、この高圧流体を得るためには、高圧ポンプ、高圧
コンプレッサー等が必要である。このため、これらの高
圧流体を製造するコストは多大なものである。However, when blowing powder such as pulverized iron carbonate into the blast furnace from the blast furnace tuyeres, a carrier fluid with a pressure higher than the furnace internal pressure is required. etc. are necessary. Therefore, the cost of manufacturing these high-pressure fluids is significant.
例えば、第２図に示すように粉体として微粉炭を高炉１
の羽口Ｎへ搬送する場合、微粉炭切出しタンク２０から
切り出された微粉炭を羽口まで搬送するために、ディス
パーサ−２２へ高圧のニアコンプレッサー２５で昇圧さ
れた高圧空気を送り込んでいる。また微粉炭切出しタン
ク２０から微粉炭を切り出すために窒素ガスコンプレッ
サー２７で昇圧された高圧の窒素ガスが用いられている
。For example, as shown in Fig. 2, pulverized coal is mixed into a blast furnace.
In order to convey the pulverized coal cut from the pulverized coal cutting tank 20 to the tuyere N, high-pressure air pressurized by a high-pressure near compressor 25 is sent to the disperser 22 in order to convey the pulverized coal cut out from the pulverized coal cutting tank 20 to the tuyere N. Further, in order to cut out pulverized coal from the pulverized coal cutting tank 20, high-pressure nitrogen gas pressurized by a nitrogen gas compressor 27 is used.
これらの高圧空気及び高圧窒素ガスを製造するには多大
な電力を消費し、微粉炭の吹込みコストを上昇させてい
る。 （鉄と鋼１９８２（６８）第１５号Ｐ３３１参照
）
（発明が解決しようとする問題点）
前述のように、従来の粉体切出し、搬送方法では、高圧
の流体が必要であり、その流体の製造のために多大なコ
ストがかかっている。例えば、高圧窒素を製造して使用
するには、窒素製造装置、輸送配管、コンプレッサー、
レシーバ−タンク等が必要であり、高圧空気の場合には
、コンプレッサー、輸送配管、レシーバ−タンク等が必
要となる。これらの装置の設備費、運転費及びメンテナ
ンスコストは多大なものである。Producing these high-pressure air and high-pressure nitrogen gas consumes a large amount of electricity, increasing the cost of blowing pulverized coal. (Refer to Tetsu-to-Hagane 1982 (68) No. 15, P331) (Problems to be solved by the invention) As mentioned above, the conventional powder cutting and conveying methods require high-pressure fluid, and It costs a lot of money to manufacture. For example, to produce and use high-pressure nitrogen, nitrogen production equipment, transportation piping, compressors,
A receiver tank, etc. is required, and in the case of high-pressure air, a compressor, transportation piping, receiver tank, etc. are required. The equipment, operating and maintenance costs for these devices are significant.
（問題点を解決するだめの手段）
本発明は高炉に吹込む粉体、例えば微粉炭、酸化鉄等を
流体を用いて切出し、搬送する場合、切出し搬送を流体
で行い、該流体の全部もしくは一部に高炉ガスの一部を
用い、かつ又はこれを自圧もしくは昇圧して用いること
にその特徴を有する。(Means for Solving the Problems) When the present invention cuts and transports powder to be injected into a blast furnace, such as pulverized coal or iron oxide, using a fluid, the cutting and transport is performed using a fluid, and all or It is characterized by using part of the blast furnace gas and/or by using it at its own pressure or at increased pressure.
すなわち搬送流体として特に炉頂圧力（２〜３に７／Ｌ
−ｍ２Ｇ）に近い高炉ガスを用いれば、粉体の切出し搬
送が容易なばかりでなく、昇圧して用いる場合でも、そ
の消費電力は高圧空気や高圧窒素を製造して用いるより
はるかに少なくてすむ。更に高炉ガスは炭酸ガス、−酸
化炭素ガス、窒素ガス、水素ガスより成る非酸化性の不
活性ガスであり、発火性の粉体を切出し、搬送する流体
としても適している特徴を有している。In other words, as a carrier fluid, especially the furnace top pressure (2 to 3 to 7/L)
Using blast furnace gas close to -m2G) not only makes it easy to cut out and transport the powder, but even when used at increased pressure, the power consumption is far less than when producing and using high-pressure air or high-pressure nitrogen. . Furthermore, blast furnace gas is a non-oxidizing inert gas consisting of carbon dioxide gas, carbon oxide gas, nitrogen gas, and hydrogen gas, and has the characteristic that it is suitable as a fluid for cutting out and transporting ignitable powder. There is.
以下本発明を高炉ガスの乾式集塵装置を有する４、００
０ｍ３の高炉に微粉炭を吹込んだ一例について第１図で
説明する。Hereinafter, the present invention will be explained as follows:
An example in which pulverized coal is injected into a 0 m3 blast furnace will be explained with reference to FIG.
高炉１から出た高炉ガスは荒ガス管１４を経て粗除塵器
２と乾式集塵装置３でダストが除去され高圧清浄ガス管
１５及び炉頂圧力制御弁４を経由して低圧清浄ガス管１
６から各使用先へ分配されている。４は炉頂圧力を制御
する弁であるが近年炉頂圧力回収タービン１７によって
炉頂圧力が制御できるようになってきた。従って、炉頂
圧力制御弁４及び回収タービン１７の上流側ガス管内の
圧力は高炉１の炉頂圧力と略同じ（２，０〜２．５ ｋ
Ｌ１／ｃｍ２Ｇ）である。この乾式集塵装置３と炉頂圧
力制御弁４との間の高圧側清浄ガス管１５がら微粉炭切
出し。The blast furnace gas discharged from the blast furnace 1 passes through a rough gas pipe 14, where dust is removed by a coarse dust remover 2 and a dry dust collector 3, and then passes through a high pressure clean gas pipe 15 and a furnace top pressure control valve 4 into a low pressure clean gas pipe 1.
6 and distributed to each user. Reference numeral 4 denotes a valve for controlling the furnace top pressure, and in recent years, it has become possible to control the furnace top pressure by a furnace top pressure recovery turbine 17. Therefore, the pressure in the furnace top pressure control valve 4 and the upstream gas pipe of the recovery turbine 17 is approximately the same as the furnace top pressure of the blast furnace 1 (2.0 to 2.5 k
L1/cm2G). Pulverized coal is cut out from the high-pressure side clean gas pipe 15 between this dry type dust collector 3 and the furnace top pressure control valve 4.
搬送用高炉ガス管５を取り出し、昇圧プロワ−６を経由
して一部は微粉炭切出し用高炉ガス管７から微粉炭貯蔵
タンク９及び微粉炭切出しタンク１０へ微粉炭切出し用
流体として送られる。もう一方の高炉ガスは微粉炭搬送
用高炉ガス管８を通ってディスパーサ−１２から微粉炭
をピックアップして微粉炭搬送管１３を経由して高炉１
へ吹込まれる。The conveying blast furnace gas pipe 5 is taken out, and a part of the fluid is sent from the pulverized coal cutting blast furnace gas pipe 7 to the pulverized coal storage tank 9 and the pulverized coal cutting tank 10 as a pulverized coal cutting fluid via the booster blower 6. The other blast furnace gas passes through the blast furnace gas pipe 8 for transporting pulverized coal, picks up pulverized coal from the disperser 12, and passes through the pulverized coal transport pipe 13 to the blast furnace 1.
blown into.
以上の如く本発明は大気圧より圧力の高い高炉ガスを用
いて高炉に吹込む粉体の切出し搬送を行うものであって
各種の粉体吹込みに適用できるものである０更に特徴的
なことは、高炉へ粉体を吹込む場合、必らず高炉は操業
中であって高炉ガスは常に発生しており、従って高炉ガ
スは粉体の搬送用流体として極めて信頼性が高いと言え
る。As described above, the present invention cuts and transports powder to be blown into a blast furnace using blast furnace gas having a pressure higher than atmospheric pressure, and can be applied to various types of powder injection. When powder is injected into a blast furnace, the blast furnace is always in operation and blast furnace gas is always generated, so blast furnace gas can be said to be extremely reliable as a fluid for transporting powder.
また近年、高炉ガスの清浄方法として、水を用いる湿式
集塵装置にかわって乾式集塵装置が採用されてきており
、集塵のためのガス圧力損失は小さくなってきており、
従って本法の優位性は更に高まってきている。すなわち
、高圧の高炉ガスを得ることによって、昇圧プロワ−の
動力が低減できるからである。In addition, in recent years, dry dust collectors have been adopted as a method for cleaning blast furnace gas instead of wet dust collectors that use water, and the gas pressure loss due to dust collection has become smaller.
Therefore, the superiority of this method is increasing further. That is, by obtaining high pressure blast furnace gas, the power of the booster blower can be reduced.
（実施例）
４．０００ｍ３の高炉に本法を適用した一実施例を従来
例と比較して第１表に示す。(Example) An example in which this method was applied to a 4,000 m3 blast furnace is shown in Table 1 in comparison with a conventional example.
第 １ 表
従来例 実施例
高炉吹込み粉体 微 粉 炭 微 粉 炭
吹込み粉体量 ３０（ｔ／ｈ）
３０いハ）粉体切出し用流体 窒素ガス（５ｋｇ７
個２） 高炉ガス（８ｋｇ／ｃｒｎ２）窒素ガスを
製造して 高炉ガスを昇圧して使用 使
用
（２，５ｋｇ７ｃｍ２−８ｋｑ／ｍ２
粉体搬送用流体 圧縮空気（３ｋｑ／＋＋＋２）
高炉ガス（８ｋｙ１０＋＋２）コンプレッサーで昇
高炉ガスを昇圧して圧して使用 使用
（０−８吟／ｃｍ２） （２，５ｋｑ／ｃｍ２−
＝８ｋｐ／ｍ２）高炉羽口前圧力 ４．０
ｋｙｊａｎ２４．０ ｋｔｌ／ｃｍ２高炉炉頂圧力
２．５ ｋｇ７ｃｍ２２．５ ｙｌ、２切出
し用流体使用量 ３，０００ Ｎｍ３／ｈ
３，０００ Ｎｍ３／ｈ（窒素ガス） （高炉
ガス）
搬送用流体使用量 ４，００ ｏＮｍ３／ｈ
４，００ ｏＮｍ３／ｈ（圧縮空気） （
高炉ガス）
（発明の効果）
本発明は以上説明したように、高圧の高炉ガスを高炉へ
の吹込み粉体の切出し及び搬送用に使用することによっ
て、高圧窒素ガス等の製造装置、輸送管、コンプレッサ
ー及ヒレシーバータンク並びに高圧空気のコンプレッサ
ー、輸送管及びレシーバ−タンク等が不要となシ、設備
費、運転費及びメンテナンスコストは大幅に低減できる
。Table 1 Conventional Example Example Blast Furnace Injected Powder Pulverized Coal Fine Powder Coal Injected Powder Amount 30 (t/h)
30 c) Powder cutting fluid Nitrogen gas (5 kg7
2) Blast furnace gas (8kg/crn2) Produce nitrogen gas and pressurize the blast furnace gas to use (2.5kg7cm2-8kq/m2 Powder conveying fluid Compressed air (3kq/+++2)
Blast furnace gas (8ky10++2) pumped up by compressor
Blast furnace gas is pressurized and used (0-8 gin/cm2) (2,5 kq/cm2-
=8kp/m2) Blast furnace tuyere pressure 4.0
kyjan24.0 ktl/cm2 blast furnace top pressure
2.5 kg7cm22.5 yl, 2 cutting fluid consumption 3,000 Nm3/h
3,000 Nm3/h (nitrogen gas) (blast furnace gas) Conveying fluid consumption 4,00 oNm3/h
4,00 oNm3/h (compressed air) (
(Blast Furnace Gas) (Effects of the Invention) As explained above, the present invention uses high pressure blast furnace gas for cutting out and transporting powder blown into the blast furnace, thereby improving production equipment and transportation pipes for high pressure nitrogen gas, etc. , a compressor, a receiver tank, a high-pressure air compressor, a transport pipe, a receiver tank, etc. are not required, and equipment costs, operating costs, and maintenance costs can be significantly reduced.
更に高炉ガスは非酸化性であシ、可燃性粉体の切出し、
搬送にも使用でき、はとんどの粉体に適用できるもので
あシ、高炉ガスが羽口から吹込まれることによって、高
炉ガス中に含まれる炭素源と水素源は高炉炉内反応上有
効に働く等の効果もある。Furthermore, the blast furnace gas is non-oxidizing and can be used to cut out combustible powder.
It can also be used for conveyance, and can be applied to most powders.By blowing blast furnace gas through the tuyere, the carbon source and hydrogen source contained in the blast furnace gas are effective for reactions inside the blast furnace. There are also effects such as working on.
また数基の高炉が稼働している場合には、炉頂圧力の最
も高い高炉の高炉ガスを他の高炉の粉体吹込み用流体と
して用いることもできる０In addition, when several blast furnaces are in operation, the blast furnace gas from the blast furnace with the highest furnace top pressure can be used as the powder injection fluid for the other blast furnaces.
第１図は本発明の全体フロー説明図、第２図は従来例の
全体フロー説明図である。
■・・・高炉 ２・・・粗除塵器３・・・乾式
集塵装置 ４・・・炉頂圧力制御弁５・・・微粉炭切出
し、搬送用高炉ガス管６・・・昇圧プロワ−
７・・・微粉炭切出し用高炉ガス管
８・・・微粉炭搬送用高炉ガス管
９．１８・・・微粉炭貯蔵タンク
１０．２０・・・微粉炭切出しタンク
１１．２１・・・微粉炭切出し管
１２・・・ディスパーサ−（固気混合器）１３・・・微
粉炭搬送管 １４・・・高炉荒ガス管１５・・・清浄ガ
ス管（高圧）
１６・・・清浄ガス管（低圧）
１７・・・炉頂圧力回収タービン
１９・・・微粉炭切出し用高圧窒素ガス管２３・・・微
粉炭搬送用高圧空気管
２４・・・高圧空気用レシーバ−タンク２５・・・空気
コンプレッサー
２６・・・高圧窒素ガス用レシーバ−タンク２７・・・
窒素カスコンプレッサー
２８・・・窒素ガス製造装置
出 願 人 新日本製鐵株式会社
年１囚FIG. 1 is an explanatory diagram of the overall flow of the present invention, and FIG. 2 is an explanatory diagram of the entire flow of the conventional example. ■... Blast furnace 2... Rough dust remover 3... Dry dust collector 4... Furnace top pressure control valve 5... Blast furnace gas pipe for cutting and transporting pulverized coal 6... Boosting blower 7 ... Blast furnace gas pipe for cutting out pulverized coal 8 ... Blast furnace gas pipe for transporting pulverized coal 9.18 ... Pulverized coal storage tank 10.20 ... Pulverized coal cutting tank 11.21 ... Pulverized coal cutting Pipe 12... Disperser (solid-gas mixer) 13... Pulverized coal transport pipe 14... Blast furnace rough gas pipe 15... Clean gas pipe (high pressure) 16... Clean gas pipe (low pressure) 17 ... Furnace top pressure recovery turbine 19 ... High pressure nitrogen gas pipe for cutting out pulverized coal 23 ... High pressure air pipe for transporting pulverized coal 24 ... Receiver tank for high pressure air 25 ... Air compressor 26 ...・Receiver tank 27 for high pressure nitrogen gas...
Nitrogen gas compressor 28...Nitrogen gas production equipment Applicant: Nippon Steel Corporation, 1st year prisoner
Claims (2)
出しと搬送、またはそのいずれか一方を流体で行い該流
体の一部または全部に高炉ガスの一部を用いることを特
徴とする高炉への吹込み粉体の切出し搬送方法。(1) A method for cutting and transporting powder to be blown into a blast furnace, characterized in that cutting and transporting, or either one of them, is performed using a fluid, and a part of blast furnace gas is used for part or all of the fluid. Cutting and conveying method of blown powder.
切出しと搬送のいずれか一方またはその両方を流体で行
い、該流体の一部または全部に高炉ガスの一部を自圧ま
たは昇圧して用いることを特徴とする高炉への吹込み粉
体の切出し搬送方法。(2) In the method of cutting and transporting the powder to be blown into the blast furnace,
Cutting out of powder blown into a blast furnace, characterized in that one or both of cutting and conveyance is performed using a fluid, and part or all of the fluid is used under self-pressure or pressurized pressure of a part of blast furnace gas. Transportation method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6356886A JPS62222006A (en) | 1986-03-20 | 1986-03-20 | Method for feeding and conveying powder to be blown into blast furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6356886A JPS62222006A (en) | 1986-03-20 | 1986-03-20 | Method for feeding and conveying powder to be blown into blast furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62222006A true JPS62222006A (en) | 1987-09-30 |
Family
ID=13232980
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6356886A Pending JPS62222006A (en) | 1986-03-20 | 1986-03-20 | Method for feeding and conveying powder to be blown into blast furnace |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62222006A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012098715A1 (en) * | 2011-01-18 | 2012-07-26 | Ｊｆｅスチール株式会社 | Method for operating blast furnace |
| CN106337099A (en) * | 2016-09-19 | 2017-01-18 | 石横特钢集团有限公司 | Low-energy-consumption powder preparing and coal powder injection technological method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55113814A (en) * | 1979-02-24 | 1980-09-02 | Ishikawajima Harima Heavy Ind Co Ltd | Operation method of blast furnace |
| JPS60159104A (en) * | 1984-01-27 | 1985-08-20 | Nippon Kokan Kk <Nkk> | Method for operating blast furnace |
-
1986
- 1986-03-20 JP JP6356886A patent/JPS62222006A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55113814A (en) * | 1979-02-24 | 1980-09-02 | Ishikawajima Harima Heavy Ind Co Ltd | Operation method of blast furnace |
| JPS60159104A (en) * | 1984-01-27 | 1985-08-20 | Nippon Kokan Kk <Nkk> | Method for operating blast furnace |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012098715A1 (en) * | 2011-01-18 | 2012-07-26 | Ｊｆｅスチール株式会社 | Method for operating blast furnace |
| CN103314118A (en) * | 2011-01-18 | 2013-09-18 | 杰富意钢铁株式会社 | Method for operating blast furnace |
| CN106337099A (en) * | 2016-09-19 | 2017-01-18 | 石横特钢集团有限公司 | Low-energy-consumption powder preparing and coal powder injection technological method |
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