JPH04309592A - Production of blast furnace coke - Google Patents
Production of blast furnace cokeInfo
- Publication number
- JPH04309592A JPH04309592A JP7512791A JP7512791A JPH04309592A JP H04309592 A JPH04309592 A JP H04309592A JP 7512791 A JP7512791 A JP 7512791A JP 7512791 A JP7512791 A JP 7512791A JP H04309592 A JPH04309592 A JP H04309592A
- Authority
- JP
- Japan
- Prior art keywords
- coke
- coal
- particle size
- coarse
- size
- 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.)
- Withdrawn
Links
- 239000000571 coke Substances 0.000 title claims abstract description 40
- 238000004519 manufacturing process Methods 0.000 title claims description 6
- 239000003245 coal Substances 0.000 claims abstract description 38
- 239000002245 particle Substances 0.000 claims description 25
- 238000000034 method Methods 0.000 claims description 16
- 239000011362 coarse particle Substances 0.000 claims description 14
- 238000010298 pulverizing process Methods 0.000 claims description 14
- 238000002156 mixing Methods 0.000 claims description 10
- 239000010419 fine particle Substances 0.000 claims description 9
- 238000003763 carbonization Methods 0.000 abstract description 4
- 239000000203 mixture Substances 0.000 abstract description 4
- 230000015572 biosynthetic process Effects 0.000 abstract 1
- 238000004939 coking Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 6
- 239000004480 active ingredient Substances 0.000 description 2
- 238000007873 sieving Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 239000002864 coal component Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- 239000004079 vitrinite Substances 0.000 description 1
Landscapes
- Coke Industry (AREA)
Abstract
Description
【０００１】0001
【産業上の利用分野】本発明は、コークスの製造方法、
特に製造するコークスの粒度を制御するコークスの製造
方法に関する。[Industrial Application Field] The present invention relates to a method for producing coke,
In particular, the present invention relates to a coke manufacturing method that controls the particle size of coke to be manufactured.
【０００２】0002
【従来の技術】一般に高炉等の冶金炉において燃料ある
いは還元剤としてコークスが使用されているが、灰分，
Ｐ，Ｓの量が少ないことと、炉床に達するまで粉砕され
ずに通風を助けるために強度の高いこと等により評価さ
れる。コークスの灰分，Ｐ，Ｓについては原料炭を選択
することにより比較的容易に制御することが可能である
。また、強度については、これを制御するには石炭の配
合技術、乾留技術や高炉の操業技術が要求される。[Prior Art] Coke is generally used as a fuel or reducing agent in metallurgical furnaces such as blast furnaces, but coke is
It is evaluated because of its small amount of P and S, and its high strength because it is not crushed until it reaches the hearth and helps ventilation. The ash content, P, and S of coke can be controlled relatively easily by selecting the raw coal. In addition, in order to control strength, coal blending technology, carbonization technology, and blast furnace operation technology are required.
【０００３】さらに、高炉での通気性に関わるものとし
てコークス粒度が重要であり、このコークスの粒度につ
いては高炉装入前のコークスを篩分して、調和平均径あ
るいは普通の平均径として求められる。Furthermore, coke particle size is important as it relates to air permeability in a blast furnace, and the coke particle size can be determined as a harmonic mean diameter or a normal mean diameter by sieving coke before charging into a blast furnace. .
【０００４】コークスの粒度は製造時における制御は難
しく、乾留条件を変更するか、特殊な配合条件にするし
か方法がなく、実際上制御することは不可能であった。[0004] It is difficult to control the particle size of coke during production, and the only way to do so is to change the carbonization conditions or use special blending conditions, and it has been practically impossible to control it.
【０００５】[0005]
【発明が解決しようとする課題】しかしながら、コーク
スの粒度制御は、高炉の安定操業のためには大切なこと
であり、乾留条件に関係なく、かつ特殊な配合条件にす
ることなく、コークスの粒度が制御できれば、その効果
は大きい。[Problem to be Solved by the Invention] However, coke particle size control is important for stable operation of blast furnaces, and it is important to control coke particle size regardless of carbonization conditions and without special blending conditions. If it can be controlled, the effect will be great.
【０００６】[0006]
【課題を解決するための手段】本発明は、コークス製造
用装入炭の粒度調整方法により、製造されるコークスの
粒度を制御することに関するものである。SUMMARY OF THE INVENTION The present invention relates to controlling the particle size of coke produced by a method of controlling the particle size of charged coal for coke production.
【０００７】多種多様な原料炭を配合、粉砕して装入炭
として、コークスを製造する場合、同一配合条件におい
ても、コークス強度は粉砕方法によって異なることが従
来から指摘され、種々の粉砕方法が開発されている現在
までのコークス強度を制御するための装入炭粒度調整に
おける公知の技術としてはつぎの方法がある。[0007] It has been pointed out that when coke is produced by blending and pulverizing a wide variety of coking coals as charging coal, the coke strength varies depending on the pulverizing method even under the same blending conditions, and various pulverizing methods are used. The following methods are known techniques for controlling the grain size of charged coal that have been developed to date to control coke strength.
【０００８】■原料炭を配合し、全量をそのまま粉砕機
に通し、３ｍｍ以下の粒度部分が７０〜９０重量％にな
るよう粉砕する方法。(2) A method in which coking coal is blended and the entire amount is passed through a pulverizer as it is to be pulverized so that the particle size portion of 3 mm or less is 70 to 90% by weight.
【０００９】■原料炭を配送する前に、銘柄別に３ｍｍ
以下７０〜９０重量％の範囲に粉砕し、その後、設定さ
れた配合割合で配合し、装入炭とする方法。■Before delivering coking coal, 3mm
A method of pulverizing to below 70 to 90% by weight and then blending at a set blending ratio to make charged coal.
【００１０】■原料炭を一定編目の篩で篩分け、篩上の
粗素粒子部分のみを粉砕機と篩の組み合わせによる閉回
路粉砕によって一定粒度以下に粉砕し、装入炭とする方
法。而して公知技術■及び■は現在のコークス業界で実
施されている最も一般的な方法であるがコークス化時に
おいて微粉砕する必要のない成分までも微粉砕され、一
方では微粉砕を必要とする成分の粉砕が不十分のままに
なっている。その結果成品コークスの強度は充分とはい
えない。しかし、粉砕に要するコストが安いため、最も
多く採用されている装入炭の粒度調整方法である。■は
■及び■の粉砕における欠点、つまり粉砕を必要としな
い成分を篩を用いて分別し、硬くて微粉砕の必要な粗粒
粉炭を選択的に粉砕する方法であり粒度調整技術として
は優れている。しかしこの方法は、原料炭を篩分ける一
次篩と粗粒子炭を閉回路粉砕するための二次篩の２種類
の篩が必要になり、コスト高になる欠点を有している。
以上に記した方法は、原料炭の粒度調整によりコークス
強度を制御する既存の技術であり、コークスの粒度調整
に関しては述べられていない。(2) A method in which raw coal is sieved through a sieve with a certain mesh size, and only the coarse particles on the sieve are pulverized to below a certain particle size by closed-circuit pulverization using a combination of a pulverizer and a sieve to produce charged coal. Therefore, although known techniques (1) and (2) are the most common methods currently practiced in the coke industry, even components that do not need to be pulverized are pulverized during coke making, and on the other hand, components that do not require pulverization are Ingredients that need to be processed are not sufficiently ground. As a result, the strength of the coke product cannot be said to be sufficient. However, because the cost required for pulverization is low, it is the most commonly used method for adjusting the particle size of charged coal. ■ is a method that eliminates the disadvantages of pulverization in ■ and ■, in other words, uses a sieve to separate components that do not require pulverization, and selectively pulverizes coarse powder coal that is hard and requires pulverization, and is an excellent particle size adjustment technology. ing. However, this method requires two types of sieves: a primary sieve for sieving raw coal and a secondary sieve for closed-circuit pulverization of coarse particle coal, resulting in high costs. The method described above is an existing technique for controlling coke strength by adjusting the particle size of raw coal, and does not mention adjustment of coke particle size.
【００１１】本発明は、原料炭の粒度調整に際しての■
および■のコークス化時において微粉砕する必要のない
成分まで微粉砕してしまう欠点と■の粗大粒子炭を閉回
路粉砕するために必要な二次篩による設備コストを低減
するために種々検討した結果見出したものであり、コー
クスの強度と粒度を制御するものである。[0011] The present invention provides:
Various studies were conducted to reduce the cost of equipment due to the secondary sieve necessary for closed-circuit pulverization of coarse particle coal, and As a result, the strength and particle size of coke can be controlled.
【００１２】つまり、原料炭を一定の大きさの篩目を有
する篩でもって細粒子部分と粗粒子部分に分離し、粗粒
子部分を粉砕機でもって粉砕処理した後、前記細粒子部
分と混合することを特徴とするものであって公知技術と
は異る新しい技術である。That is, raw coal is separated into a fine particle portion and a coarse particle portion using a sieve having sieve openings of a certain size, and the coarse particle portion is pulverized using a pulverizer, and then mixed with the fine particle portion. This is a new technology that is different from known technology.
【００１３】石炭３〜７ｍｍの粒度範囲で粗粒子部分と
細粒子部分に分級する。３〜７ｍｍを分級点とする粗粒
子部分には原料炭中で活性成分に富まないフジニット、
セミフジニット、スクレロチニット、マクリニット及び
鉱物質の含有量が多くコークス化の際に軟化溶融せずコ
ークス壁を形成するためコークス組織が不均一になると
ともに、亀裂発生源になる。このため、これら石炭の３
〜７ｍｍを分級点とする粗粒子部分は微粉砕化する必要
がある。ただし、前期の３〜７ｍｍを分級点とする細粒
子炭部分はビトリニットを中心とした活性成分が多いた
めに粉砕の必要はない。[0013] The coal is classified into a coarse particle portion and a fine particle portion within the particle size range of 3 to 7 mm. The coarse particle portion with a classification point of 3 to 7 mm contains Fujinit, which is not rich in active ingredients in raw coal.
It has a high content of semi-fuginite, sclerotinite, macrinit, and mineral substances, which do not soften and melt during coking and form coke walls, making the coke structure uneven and becoming a source of cracks. Therefore, 3 of these coals
The coarse particle portion with a classification point of ~7 mm needs to be pulverized. However, the fine particle carbon part with a classification point of 3 to 7 mm in the first stage does not need to be pulverized because it contains many active ingredients mainly vitrinite.
【００１４】他方、原料石炭の中で活性成分の多い石炭
は、コークス化面より見た場合、粗粒子炭部分をあえて
微粉砕する必要はないが、７ｍｍ以上の石炭粒子の存在
は、複数の炭種を混合して、コークスを製造する場合に
はコークス化過程において、異炭種間の石炭粒し相互の
溶融混合ができないため、単一石炭成分からできたコー
クス組織の占める容積が大きくなり、コークス塊内での
不均一な組織を形成する。このため３〜７ｍｍを分級点
として原料石炭中の粗粒子部分を細粒化するために分級
するものである。On the other hand, in the case of raw coal containing many active components, from the perspective of coking, there is no need to pulverize the coarse particulate coal, but the presence of coal particles of 7 mm or more may result in multiple When coke is produced by mixing coal types, during the coking process, coal grains of different coal types cannot be melted and mixed with each other, so the volume occupied by the coke structure made from a single coal component increases. , forming a non-uniform structure within the coke mass. For this reason, the classification point is set at 3 to 7 mm in order to refine the coarse particles in raw coal.
【００１５】しかし、好ましくは粗粒子炭部分と細粒子
炭部分を分離する分級点は４〜６ｍｍが良い。However, preferably, the classification point for separating the coarse-grained coal portion and the fine-grained coal portion is 4 to 6 mm.
【００１６】[0016]
【実施例】本実施例に使用した石炭の性状を表１に示す
。[Example] Table 1 shows the properties of the coal used in this example.
【００１７】[0017]
【表１】[Table 1]
【００１８】表１に示す配合炭を使用した。表１に示す
配合炭を５ｍｍ篩で分級し、５ｍｍ以上の粗粒子部分を
３ｍｍ以下に粉砕後、５ｍｍ以下の細粒部分と混合して
配合炭とし、コークス炉へ装入した。[0018] The coal blends shown in Table 1 were used. The coal blends shown in Table 1 were classified using a 5 mm sieve, and the coarse particles of 5 mm or more were pulverized to 3 mm or less, mixed with the fine particles of 5 mm or less to form a coal blend, and charged into a coke oven.
【００１９】図１にその結果を示す。図１に示すように
粒度調整を行うことによって、通常粉砕（３ｍｍ以下８
５％）に比較してコークス粗粒部分が増し、平均粒度が
大きくなる。FIG. 1 shows the results. By adjusting the particle size as shown in Figure 1, normal pulverization (3 mm or less 8
5%), the coarse coke portion increases and the average particle size becomes larger.
【００２０】[0020]
【発明の効果】本発明の方法によれば、配合炭を粗粒子
部分と細粒子部分に分け、その後粗粒子部分を粉砕し、
細粒子部分と配合することにより、コークスの＞２５ｍ
ｍ歩留と平均粒度を制御することができるので大きい利
点がある。[Effects of the Invention] According to the method of the present invention, blended coal is divided into a coarse particle portion and a fine particle portion, and then the coarse particle portion is pulverized.
By blending with the fine particle part, coke of >25m
This has great advantages because it allows control of yield and average particle size.
【図１】実施例における生成コークスの粒度分布を示す
図である。FIG. 1 is a diagram showing the particle size distribution of produced coke in an example.
Claims (1)
部分と細粒子部分に分級し、粗粒子部分を２〜７ｍｍの
最大粒子径が得られるように粉砕し、前記細粒子部分と
混合することを特徴とするコークス炉装入炭の粒度調整
方法によりコークスの粒度を制御することを特徴とする
高炉用コークスの製造法。1. Classifying coal into a coarse particle portion and a fine particle portion in a particle size range of 3 to 7 mm, pulverizing the coarse particle portion to obtain a maximum particle size of 2 to 7 mm, and mixing it with the fine particle portion. A method for producing coke for blast furnaces, characterized in that the particle size of coke is controlled by a method for adjusting the particle size of coal charged in a coke oven.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7512791A JPH04309592A (en) | 1991-04-08 | 1991-04-08 | Production of blast furnace coke |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7512791A JPH04309592A (en) | 1991-04-08 | 1991-04-08 | Production of blast furnace coke |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04309592A true JPH04309592A (en) | 1992-11-02 |
Family
ID=13567224
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7512791A Withdrawn JPH04309592A (en) | 1991-04-08 | 1991-04-08 | Production of blast furnace coke |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04309592A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005154737A (en) * | 2003-10-31 | 2005-06-16 | Jfe Steel Kk | Production process of coke |
| AT500405A1 (en) * | 1997-12-09 | 2005-12-15 | Steel Authority Of India Ltd A | PROCESS FOR THE PREPARATION OF COAL FOR THE CULTIVATION OF COOKING OVEN |
| WO2006038356A1 (en) * | 2004-09-30 | 2006-04-13 | Jfe Steel Corporation | Process for production of cokes and productive facilities therefor |
| JP2006348309A (en) * | 2003-10-31 | 2006-12-28 | Jfe Steel Kk | Process for production of cokes and productive facilities therefor |
| CN110564439A (en) * | 2019-08-30 | 2019-12-13 | 武汉钢铁有限公司 | Coal blending and coking method for coking coal with coarse grain mosaic structure content of more than or equal to 70 percent |
| CN110982548A (en) * | 2019-12-23 | 2020-04-10 | 中煤科工清洁能源股份有限公司 | Coal preparation method for coking coal material |
-
1991
- 1991-04-08 JP JP7512791A patent/JPH04309592A/en not_active Withdrawn
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT500405A1 (en) * | 1997-12-09 | 2005-12-15 | Steel Authority Of India Ltd A | PROCESS FOR THE PREPARATION OF COAL FOR THE CULTIVATION OF COOKING OVEN |
| JP2005154737A (en) * | 2003-10-31 | 2005-06-16 | Jfe Steel Kk | Production process of coke |
| JP2006348309A (en) * | 2003-10-31 | 2006-12-28 | Jfe Steel Kk | Process for production of cokes and productive facilities therefor |
| JP4617814B2 (en) * | 2003-10-31 | 2011-01-26 | Ｊｆｅスチール株式会社 | Coke production method |
| WO2006038356A1 (en) * | 2004-09-30 | 2006-04-13 | Jfe Steel Corporation | Process for production of cokes and productive facilities therefor |
| KR100865223B1 (en) * | 2004-09-30 | 2008-10-23 | 제이에프이 스틸 가부시키가이샤 | Process for production of cokes and productive facilities therefor |
| CN110564439A (en) * | 2019-08-30 | 2019-12-13 | 武汉钢铁有限公司 | Coal blending and coking method for coking coal with coarse grain mosaic structure content of more than or equal to 70 percent |
| CN110982548A (en) * | 2019-12-23 | 2020-04-10 | 中煤科工清洁能源股份有限公司 | Coal preparation method for coking coal material |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Application deemed to be withdrawn because no request for examination was validly filed |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 19980711 |