JPH09157657A - Production of ferruginous metallurgical coke and ferruginous pellet - Google Patents
Production of ferruginous metallurgical coke and ferruginous pelletInfo
- Publication number
- JPH09157657A JPH09157657A JP32137595A JP32137595A JPH09157657A JP H09157657 A JPH09157657 A JP H09157657A JP 32137595 A JP32137595 A JP 32137595A JP 32137595 A JP32137595 A JP 32137595A JP H09157657 A JPH09157657 A JP H09157657A
- Authority
- JP
- Japan
- Prior art keywords
- coal
- particle size
- coke
- ferruginous
- coke oven
- 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.)
- Granted
Links
Landscapes
- Coke Industry (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、含鉄冶金用コーク
スの製造方法及びその途中の工程で得られる含鉄造粒物
に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a coke for iron-containing metallurgy and an iron-containing granulated product obtained in a process in the middle thereof.
【０００２】[0002]
【従来の技術】含鉄冶金用コークスの思想はかなり古く
からあり、１９５０年代には長期にわたる実コークス炉
での製造状況が報告されている。このときは、コークス
製造用石炭と高炉で発生するダストとを単に混合した状
態でコークス炉に装入するものであった。その後も高炉
ダスト以外の鉄源を原料に用いた含鉄冶金用コークスの
製造方法についていくつかの報告がある。しかし、鉄源
となる原料を多量に配合した場合や、粉焼結鉱を原料と
して用いた場合には、コークス製造用石炭と混合してコ
ークス炉に装入し、これを乾留してもコークス炉の珪石
レンガを損傷する可能性が大きいため、実用化はされて
いない。The concept of iron-containing metallurgical coke has been around for a long time, and in the 1950s, a long-term production status in an actual coke oven was reported. At this time, the coke-producing coal and the dust generated in the blast furnace were simply mixed and charged into the coke oven. After that, there were some reports on the method for producing coke for iron-containing metallurgy using an iron source other than blast furnace dust as a raw material. However, when a large amount of a raw material that becomes an iron source is blended or when powdered sinter is used as a raw material, it is mixed with coal for coke production, charged into a coke oven, and coke even if it is carbonized. It has not been put to practical use because it is likely to damage the silica stone bricks in the furnace.
【０００３】[0003]
【発明が解決しようとする課題】そこで、本発明では、
粉焼結鉱を鉄源として用い、コークス炉の珪石レンガを
損傷させずに含鉄冶金用コークスを製造する方法ととも
に、このコークス製造に適した含鉄造粒物を提供する。Therefore, in the present invention,
A method for producing a coke for iron-containing metallurgy without damaging a silica stone brick of a coke oven by using a powdered ore as an iron source, and an iron-containing granule suitable for producing the coke.
【０００４】[0004]
【課題を解決するための手段】本発明では、上記課題を
解決するために、粒径１〜５ｍｍの粉焼結鉱と粒径２ｍ
ｍ以下の微粉炭とを混合・造粒して、粉焼結鉱表面を微
粉炭で被覆した粒径７〜１５ｍｍの造粒物を得、この造
粒物をコークス製造用石炭とともにコークス炉で乾留し
て、含鉄冶金用コークスを製造するものである。その
際、途中の工程で得られる、粒径１〜５ｍｍの粉焼結鉱
の表面を粒径２ｍｍ以下の微粉炭で被覆した粒径７〜１
５ｍｍの含鉄造粒物が本発明を成す上で重要な中間製品
となっている。According to the present invention, in order to solve the above-mentioned problems, powdered ore having a particle size of 1 to 5 mm and a particle size of 2 m are used.
Mixing and granulating with pulverized coal of m or less to obtain a granulated product having a particle size of 7 to 15 mm in which the surface of the powder sinter is coated with pulverized coal, and the granulated product is coke oven with coking coal. Carbonization is carried out to produce iron-containing metallurgical coke. In that case, the surface of the powdered ore having a particle size of 1 to 5 mm obtained in an intermediate step is coated with pulverized coal having a particle size of 2 mm or less, and a particle size of 7 to 1
A 5 mm iron-containing granule is an important intermediate product in the present invention.
【０００５】[0005]
【発明の実施の形態】鉄源となる原料を多量に配合した
場合にコークス炉の珪石レンガを損傷する理由は、鉄源
が還元される際の中間生成物であるＦｅＯが乾留時に多
量に生成し、さらに、これが珪石レンガの主成分である
ＳｉＯ2 と反応してＦａｙａｌｉｔｅ（Ｆｅ2 ＳｉＯ
4 ）を生成するからである。しかしながら、ＦｅＯ以外
の形態（Ｆｅ2 Ｏ3 ，Ｆｅ3 Ｏ4 ，Ｆｅ）であればこの
ようにＳｉＯ2 と反応することはない。BEST MODE FOR CARRYING OUT THE INVENTION The reason for damaging silica stone bricks in a coke oven when a large amount of an iron source material is blended is that FeO, which is an intermediate product when the iron source is reduced, is produced in a large amount during carbonization. In addition, this reacts with SiO 2 which is the main component of silica stone bricks to produce Fayalite (Fe 2 SiO 2
4 ) is generated. However, if it is a form other than FeO (Fe 2 O 3 , Fe 3 O 4 , Fe), it does not react with SiO 2 in this way.
【０００６】また、粉焼結鉱中には、高炉ダストや粉鉱
石に比べ、多くのＣａＯが含まれている。このＣａＯが
コークス炉の珪石レンガの主成分であるＳｉＯ2 と反応
してＰｓｅｕｄｏｗｏｌｌａｓｔｎｉｔｅ（α−ＣａＳ
ｉＯ3 ）を生成し、これが原因となっても珪石レンガを
損傷する。[0006] In addition, powdered sinter contains a large amount of CaO as compared with blast furnace dust and powdered ore. This CaO reacts with SiO 2 which is the main component of the silica stone brick of the coke oven to cause Pseudowollastnite (α-CaS
iO 3 ) is produced, and even if it is caused, it damages the silica brick.
【０００７】従って、鉄源として粉焼結鉱を多量に用い
るためには、焼結鉱が還元される際の中間生成物である
ＦｅＯに対して、さらに還元を促進するとともに、これ
が珪石レンガと直接接触しないようにする必要がある。
そこで、本発明では微粉炭を粉焼結鉱の表面に付着さ
せ、微粉炭の被覆層を形成するように造粒することを考
えた。ここで、微粉炭を用いた理由は、成品コークス
中に余分な異物として残留することがない、ＦｅＯの
還元剤になる、一般的に用いられる安価な原料であ
る、等の理由による。また、用いる微粉炭の粒径を２
（ｍｍ）以下に限定した理由は、この範囲の粒径で合え
ば水分による造粒が容易であることによる。一方、粉焼
結鉱の粒径を１〜５（ｍｍ）に限定した理由は、粒径が
５（ｍｍ）超の粉焼結鉱は通常高炉でそのまま使用でき
るが、５（ｍｍ）以下のものは、リサイクルを考えなけ
ればならず、この粒径のものと有効活用することにメリ
ットがあること、また、粒径が１（ｍｍ）未満の粉焼結
鉱は非鉄酸化物の含有率が高く、経済面で非効率的であ
ることによる。Therefore, in order to use a large amount of powdered ore as an iron source, the reduction is further promoted with respect to FeO, which is an intermediate product when the ore is reduced, and this becomes silica stone brick. It is necessary to avoid direct contact.
Therefore, in the present invention, it was considered to adhere pulverized coal to the surface of the powder sinter and granulate it so as to form a coating layer of pulverized coal. Here, the reason for using pulverized coal is that it does not remain as extraneous foreign matter in the product coke, serves as a reducing agent for FeO, and is a commonly used inexpensive raw material. The particle size of the pulverized coal used is 2
The reason why it is limited to (mm) or less is that granulation with water is easy if the particle size is within this range. On the other hand, the reason why the particle size of the powder sinter is limited to 1 to 5 (mm) is that the powder sinter having a particle size of more than 5 (mm) can be used as it is in a blast furnace as it is. It is necessary to consider recycling, and it is advantageous to effectively utilize with this particle size, and the powdered sinter with a particle size of less than 1 (mm) has a non-ferrous oxide content rate. It is expensive and economically inefficient.
【０００８】一方、造粒物の粒径を７〜１５（ｍｍ）に
限定した理由は、１５（ｍｍ）超の場合には造粒に時間
がかかり、生産性が悪いこと、また、７（ｍｍ）未満の
場合には微粉炭が粉焼結鉱の還元にすべて消費されてし
まい、粉焼結鉱が直接珪石レンガと接触するおそれがあ
るためである。On the other hand, the reason for limiting the particle size of the granulated product to 7 to 15 (mm) is that if it exceeds 15 (mm), it takes time to granulate and the productivity is poor. If it is less than mm), the pulverized coal is completely consumed for the reduction of the powder sinter, and the powder sinter may come into direct contact with the silica stone brick.
【０００９】[0009]
【実施例】以下に、本発明の実施例を詳細に説明する。Embodiments of the present invention will be described below in detail.
【００１０】実施例１ まず、実施例１は含鉄高炉用コークスの製造例である。
すなわち、ペレタイザーを用いて、粒径１〜３（ｍｍ）
の粉焼結鉱に適当な量の水分を添加しながら粒径１（ｍ
ｍ）以下の微粉炭をその粉焼結鉱表面に付着させて、粒
径７〜１５（ｍｍ）の造粒物を製造する。次に、これら
の造粒物とコークス製造用石炭とを重量分率で２０：８
０の割合で混合しコークス炉に装入する。なお、ここで
は、コークス製造用石炭として、強粘結炭６８（ｍａｓ
ｓ％）、弱粘結炭１３（ｍａｓｓ％）、一般炭１９（ｍ
ａｓｓ％）の配合の石炭を用いた。その後、これを１２
００（℃）で約１８（ｈｒ）乾留し、含鉄高炉用コーク
スを製造した。このとき、コークス炉の珪石レンガに
は、視認可能な損傷は見られなかった。Example 1 First, Example 1 is an example of manufacturing coke for iron-containing blast furnace.
That is, using a pelletizer, a particle size of 1 to 3 (mm)
Particle size 1 (m
m) The following pulverized coal is adhered to the surface of the powder sinter to produce a granulated product having a particle size of 7 to 15 (mm). Next, these granules and coke-making coal are mixed at a weight fraction of 20: 8.
Mix at a ratio of 0 and charge in a coke oven. In addition, here, as coking coal, strong cohesive coal 68 (mas
s%), weak coking coal 13 (mass%), steam coal 19 (m
% coal was used. After that, this 12
It was carbonized at 00 (° C.) for about 18 (hr) to produce iron-containing blast furnace coke. At this time, no visible damage was found on the silica brick of the coke oven.
【００１１】実施例２ また、実施例２は含鉄キュポラ用コークスの製造例であ
る。すなわち、ペレタイザーを用いて、粒径１〜５（ｍ
ｍ）の粉焼結鉱に適当な量の水分を添加しながら粒径２
（ｍｍ）以下の微粉炭をその粉焼結鉱表面に付着させ
て、粒径１０〜１５（ｍｍ）の造粒物を製造する。次
に、コークス炉にコークス製造用石炭のみを装入し、炉
底部に厚さ約５００（ｍｍ）の石炭単味層を形成する。
そのあと、先の造粒物とコークス製造用石炭とを重量分
率で４０：６０の割合で混合しコークス炉に装入する。
なお、ここでは、コークス製造用石炭としては、強粘結
炭６０（ｍａｓｓ％）、弱粘結炭１４（ｍａｓｓ％）、
一般炭２６（ｍａｓｓ％）の配合の石炭を用いた。その
後、これを１２００（℃）で約２０（ｈｒ）乾留し、含
鉄キュポラ用コークスを製造した。このとき、コークス
炉の珪石レンガには、視認可能な損傷は見られず、ま
た、押し出しも容易に行うことができた。Example 2 In addition, Example 2 is a production example of coke for iron-containing cupola. That is, using a pelletizer, a particle size of 1 to 5 (m
Particle size 2 while adding an appropriate amount of water to the powdered ore of m)
Pulverized coal of (mm) or less is adhered to the surface of the powder sinter to produce a granulated product having a particle size of 10 to 15 (mm). Next, only the coke-producing coal is charged into the coke oven, and a coal monolayer having a thickness of about 500 (mm) is formed at the bottom of the oven.
Then, the above granulated material and the coal for producing coke are mixed at a weight ratio of 40:60 and charged into a coke oven.
In addition, here, as coke-producing coal, strong cohesive coal 60 (mass%), weak cohesive coal 14 (mass%),
Coal having a blend of steam coal 26 (mass%) was used. Then, this was carbonized at 1200 (° C.) for about 20 (hr) to produce a coke for iron-containing cupola. At this time, no visible damage was found on the silica stone brick of the coke oven, and the extrusion could be easily performed.
【００１２】[0012]
【発明の効果】本発明により、粉焼結鉱を鉄源として用
い、コークス炉の珪石レンガを損傷させることなくコー
クス炉で含鉄冶金用コークスを製造することができる。According to the present invention, iron-containing metallurgical coke can be produced in a coke oven without damaging the silica stone brick of the coke oven, using the powdered ore as an iron source.
Claims (2)
以下の微粉炭とを混合・造粒して、粉焼結鉱表面を微粉
炭で被覆した粒径７〜１５ｍｍの造粒物を得、この造粒
物をコークス製造用石炭とともにコークス炉で乾留する
ことを特徴とする含鉄冶金用コークスの製造方法。1. A powdered sinter having a particle size of 1 to 5 mm and a particle size of 2 mm
The following pulverized coal is mixed and granulated to obtain a granulated product having a particle size of 7 to 15 mm in which the surface of the powder sinter is coated with pulverized coal, and the granulated product is dry-distilled in a coke oven together with coal for coke production. A method for producing a coke for ferrous metallurgy, comprising:
２ｍｍ以下の微粉炭で被覆した粒径７〜１５ｍｍの含鉄
冶金用コークス製造用含鉄造粒物。2. An iron-containing granulated product for producing a coke for iron-containing metallurgy having a particle size of 7 to 15 mm, which is obtained by coating the surface of a powder sinter having a particle size of 1 to 5 mm with pulverized coal having a particle size of 2 mm or less.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32137595A JP3510408B2 (en) | 1995-12-11 | 1995-12-11 | Method for producing coke for iron-containing metallurgy and iron-containing granulated product |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32137595A JP3510408B2 (en) | 1995-12-11 | 1995-12-11 | Method for producing coke for iron-containing metallurgy and iron-containing granulated product |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH09157657A true JPH09157657A (en) | 1997-06-17 |
| JP3510408B2 JP3510408B2 (en) | 2004-03-29 |
Family
ID=18131867
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP32137595A Expired - Fee Related JP3510408B2 (en) | 1995-12-11 | 1995-12-11 | Method for producing coke for iron-containing metallurgy and iron-containing granulated product |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3510408B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007177214A (en) * | 2005-11-30 | 2007-07-12 | Jfe Steel Kk | Method for producing ferrocoke |
| CN103710037A (en) * | 2013-12-20 | 2014-04-09 | 清华大学 | Fluidized-bed low-rank coal upgrading utilization system and method |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102822317B (en) * | 2010-03-19 | 2014-08-27 | 新日铁住金株式会社 | Process for production of solid fuel for use in sintering, solid fuel for use in sintering, and process for manufacturing sintered ore using same |
-
1995
- 1995-12-11 JP JP32137595A patent/JP3510408B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007177214A (en) * | 2005-11-30 | 2007-07-12 | Jfe Steel Kk | Method for producing ferrocoke |
| CN103710037A (en) * | 2013-12-20 | 2014-04-09 | 清华大学 | Fluidized-bed low-rank coal upgrading utilization system and method |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3510408B2 (en) | 2004-03-29 |
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