JP2001040363A - Production of high-quality coke - Google Patents
Production of high-quality cokeInfo
- Publication number
- JP2001040363A JP2001040363A JP11214669A JP21466999A JP2001040363A JP 2001040363 A JP2001040363 A JP 2001040363A JP 11214669 A JP11214669 A JP 11214669A JP 21466999 A JP21466999 A JP 21466999A JP 2001040363 A JP2001040363 A JP 2001040363A
- Authority
- JP
- Japan
- Prior art keywords
- coke
- coal
- fine
- caking filler
- carbonaceous material
- 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
Landscapes
- Coke Industry (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、高炉に使用できる高品
質コークスの製造方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing high-quality coke usable in a blast furnace.
【０００２】[0002]
【従来の技術】高炉用のコークスは、鉄鉱石の還元剤と
しての機能および燃料としての機能を有しているが、そ
ればかりではなく、スペーサーとして高炉内の通気性を
確保するという重要な役割も担っている。そのため、高
炉用コークスは強度が高く、粒径が大きいことが要求さ
れる。2. Description of the Related Art Coke for blast furnaces has a function as a reducing agent for iron ore and a function as a fuel, but also has an important role of securing air permeability in the blast furnace as a spacer. I also carry. Therefore, blast furnace coke is required to have high strength and a large particle size.
【０００３】このようなコークスの製造に使用される室
炉式コークス炉は、石炭を乾留するための炭化室とこの
炭化室に熱を供給するための燃焼室とが交互にサンドイ
ッチ状に配置された構成を有している。炭化室の大きさ
は、一般的には、高さが６〜７ｍ、長さが１５〜１７ｍ
で、幅は０．４５ｍ程度である。そして、例えば２０〜
４０ｔの石炭が一度に炭化室に装入され、２４時間前後
の乾留時間で１０００℃程度にまで乾留されてコークス
炉（炭化室）から排出される。コークス炉から排出され
た赤熱コークスは、次いで散水による湿式冷却または不
活性ガスによる乾式冷却により消火、冷却される。[0003] In a coke oven type coke oven used for producing such coke, a carbonization chamber for carbonizing coal and a combustion chamber for supplying heat to the carbonization chamber are alternately arranged in a sandwich form. Configuration. Generally, the size of the carbonization chamber is 6 to 7 m in height and 15 to 17 m in length.
And the width is about 0.45 m. And, for example, 20-
40 tons of coal are charged into the coking chamber at one time, carbonized to about 1000 ° C. with a carbonization time of about 24 hours, and discharged from the coke oven (carbonization chamber). The red hot coke discharged from the coke oven is then extinguished and cooled by wet cooling with water spray or dry cooling with an inert gas.
【０００４】炭化室と燃焼室とは厚さ１００ｍｍ前後の
煉瓦を介して隔てられており、燃焼室からの熱は煉瓦壁
側の石炭に伝えられ、次いでこの熱が炉幅中央部（炭中
部）に向かって順次伝えられていく。したがって、炭化
室内の石炭またはコークス層の温度は、乾留中のほとん
どの期間において壁側で高く、炭中部で低いという状態
を呈している。また、壁側から炭中部への熱の伝導は、
主として伝熱効率の悪い伝導伝熱によって行われるた
め、炭中部まで昇温するには長時間を要し、結局２４時
間前後もの時間がかかってしまうことになる。[0004] The carbonization chamber and the combustion chamber are separated by a brick having a thickness of about 100 mm, and the heat from the combustion chamber is transmitted to the coal on the brick wall side. ). Therefore, the temperature of the coal or coke layer in the carbonization chamber is high on the wall side and low in the middle part of the coal for most of the period during carbonization. In addition, the conduction of heat from the wall side to the middle of the coal is
It is performed mainly by conduction heat transfer with poor heat transfer efficiency, so it takes a long time to raise the temperature to the middle portion of the coal, and it takes about 24 hours after all.
【０００５】この、壁側から炭中部への伝熱性を改善す
る一つの方法として燃焼室の温度を高くして乾留温度を
上昇させることが有効であり、それによって乾留時間を
短縮して生産性の向上を図ることが従来からなされてい
る。この場合、例えば乾留温度を１００℃上昇させるこ
とにより乾留時間を５時間程度短縮することが可能で、
生産性を向上させる点で大きな効果がある。しかしなが
ら、この場合、製品コークスの粒径が低下するという現
象が生起する。この原因は明確ではないが、壁側と炭中
側との温度差の拡大、あるいは昇温速度の上昇に伴うコ
ークス塊内の熱応力の増大によりコークス塊に生じる亀
裂が増加し、そのため細粒化するものと推察される。As one method of improving the heat transfer from the wall side to the middle part of the coal, it is effective to raise the temperature of the combustion chamber to raise the carbonization temperature, thereby shortening the carbonization time and increasing the productivity. It has been conventionally attempted to improve the quality. In this case, for example, by raising the carbonization temperature by 100 ° C., the carbonization time can be reduced by about 5 hours,
There is a great effect in improving productivity. However, in this case, a phenomenon occurs in which the particle size of the product coke decreases. Although the cause is not clear, the cracks generated in the coke mass increase due to the increase in the temperature difference between the wall side and the inside of the coal, or the increase in the thermal stress in the coke mass due to the increase in the heating rate, and as a result It is presumed that
【０００６】このような乾留温度の上昇による生産性の
向上に伴う粒径の低下を抑制するには、原料石炭中への
不活性炭材（例えば、微粉コークス）の添加が有効であ
ることがよく知られている（例えば、特開昭６０―６９
１９２号公報参照）。しかしながら、不活性炭材を原料
石炭中に添加すると、コークスの粒径は増大するもの
の、不可避的にコークスの強度が低下する。In order to suppress a decrease in particle size due to an increase in productivity due to an increase in the carbonization temperature, it is often effective to add an inert carbon material (for example, fine coke) to the raw coal. Known (for example, Japanese Patent Application Laid-Open No. 60-69)
192). However, when the inert carbon material is added to the raw coal, the particle size of the coke increases, but the strength of the coke inevitably decreases.
【０００７】このコークスの強度低下を抑止するため
に、原料石炭中に不活性炭材とともにタールやタールピ
ッチ等の粘結性補填剤を添加する方法が提案された（特
開平３−２７７６８６号公報および特開平６−１７０５
６号公報）。しかし、これら粘結性補填剤の添加量は不
活性炭材と同程度であって、経済的に不利である。ま
た、近年、原料石炭を、それに含まれる水分を低減させ
た後コークス炉に装炭する方法が普及しているが、水分
低減のため原料石炭を加熱するので、装炭時の石炭の温
度が６０℃以上の高温になっている場合も多く、このよ
うな場合には、添加した粘結性補填剤が石炭の搬送過程
で粘着し、あるいは揮発する等の不都合を生じるので、
使用できない。In order to suppress the decrease in coke strength, there has been proposed a method of adding a caking filler such as tar or tar pitch together with an inert carbon material to the raw coal (Japanese Patent Application Laid-Open No. 3-277686 and JP-A-6-1705
No. 6). However, the addition amount of these caking fillers is almost the same as that of the inert carbon material, which is economically disadvantageous. In recent years, a method of charging raw coal into a coke oven after reducing the moisture contained therein has become widespread.However, since the raw coal is heated to reduce the moisture, the temperature of the coal at the time of charging is low. In many cases, the temperature is as high as 60 ° C. or more. In such a case, the added caking filler becomes sticky or condensed in the course of transporting the coal.
I can not use it.
【０００８】[0008]
【発明が解決しようとする課題】本発明は、このような
問題を解決するためになされたもので、コークスの粒径
および高強度を確保しつつ粘結性補填剤の使用量を削減
し、乾留時間を短縮して生産性の向上を図ることを目的
としている。SUMMARY OF THE INVENTION The present invention has been made in order to solve such a problem, and it has been made possible to reduce the amount of caking filler used while maintaining the particle size and high strength of coke. The purpose is to improve the productivity by shortening the carbonization time.
【０００９】[0009]
【課題を解決するための手段】本発明の要旨は、下記の
高品質コークスの製造方法にある。The gist of the present invention resides in the following method for producing high quality coke.
【００１０】軟化溶融性を有しない細粒炭材と粘結性補
填剤とをあらかじめ混合することによって前記炭材の表
面部に粘結性補填剤を含浸させ、この粘結性補填剤を含
浸させた細粒炭材を原料石炭に混合した後、その原料石
炭を室炉式コークス炉に装入し、乾留する高品質コーク
スの製造方法。The surface of the carbonaceous material is impregnated with a caking filler by previously mixing a fine-grained carbonaceous material having no softening and melting properties with a caking filler, and impregnated with the caking filler. A method for producing high-quality coke, in which after mixing the fine-grained carbon material with the raw coal, the raw coal is charged into a room-type coke oven and carbonized.
【００１１】ここで、「含浸」とは、粘結性補填剤が細
粒炭材の気孔内壁を含む表面部に付着、保持されている
状態を指す。ただし、粘結性補填剤の全量が必ずしも微
粒炭材の表面部に含浸している必要はなく、一部は微粒
炭材の極近傍に存在していてもよい。Here, "impregnation" refers to a state in which the caking filler is attached to and held on the surface of the fine carbonaceous material including the pore inner wall. However, it is not always necessary that the entire amount of the caking filler is impregnated on the surface of the fine carbonaceous material, and a part thereof may be present in the very vicinity of the fine carbonaceous material.
【００１２】細粒炭材として比表面積が５０ｍ2 ／ｇ以
上のものを用いれば、粘結性補填剤を添加した原料石炭
を水分低減のために加熱しても、添加した粘結性補填剤
が粘着性を示したり、あるいは揮発したりすることがな
いので取扱い上、好ましい。When the fine carbonaceous material having a specific surface area of 50 m 2 / g or more is used, even if the raw coal to which the caking filler is added is heated to reduce the moisture content, the added caking filler is added. Is preferred from the viewpoint of handling since it does not show tackiness or volatilize.
【００１３】[0013]
【発明の実施の形態】以下に、本発明の高品質コークス
の製造方法（以下、本発明方法という）について詳細に
説明する。BEST MODE FOR CARRYING OUT THE INVENTION The method for producing high-quality coke of the present invention (hereinafter referred to as the method of the present invention) will be described in detail below.
【００１４】本発明方法では、先ず、軟化溶融性を有し
ない細粒炭材と粘結性補填剤とをあらかじめ混合するこ
とによって前記炭材の表面部に粘結性補填剤を含浸させ
る。In the method of the present invention, first, the surface portion of the carbon material is impregnated with the caking filler by previously mixing the fine carbonaceous material having no softening and melting properties and the caking filler.
【００１５】細粒炭材は、軟化溶融性を有しないもので
あれば、その種類は特に限定されない。例えば、無煙
炭、粉コークス等が使用可能である。軟化溶融性を有し
なければ、コークスの粒径増大効果が認められるからで
ある。The type of the fine carbonaceous material is not particularly limited as long as it does not have softening and melting properties. For example, anthracite, coke breeze and the like can be used. This is because if the material does not have softening and melting properties, an effect of increasing the particle size of coke is recognized.
【００１６】細粒炭材の粒径も、特に限定されない。し
かし、細粒と称されるものであっても、粒径が大きいと
原料石炭中への混合の均一性が低下し、コークスの粒径
を増大する効果がなくなるとともにコークス強度も低下
する傾向が見られるので、粒径は３ｍｍ以下とするのが
望ましい。The particle size of the fine carbonaceous material is not particularly limited. However, even with what is called fine particles, if the particle size is large, the uniformity of mixing into the raw coal decreases, and the effect of increasing the particle size of coke is lost, and the coke strength tends to decrease. Therefore, the particle size is desirably 3 mm or less.
【００１７】粘結性補填剤としては、コークスの強度向
上機能を有する物質なら如何なるものでも使用可能であ
る。例えば、コールタール、コールタールピッチ、アス
ファルト、アスファルトピッチ、石炭の液化処理残さ、
溶剤精製炭等があげられる。粘結性補填剤の添加量は、
コークスの品質との兼ね合いで任意の量（割合）とする
ことができるが、経済性を考えると少量の方が好まし
く、細粒炭材と同重量以下、好ましくは１／２以下であ
る。As the caking filler, any substance having a function of improving coke strength can be used. For example, coal tar, coal tar pitch, asphalt, asphalt pitch, coal liquefaction residue,
Solvent-purified coal and the like. The amount of caking filler added is
An arbitrary amount (ratio) can be used in consideration of the quality of coke. However, considering economic efficiency, a small amount is preferable, and the weight is equal to or less than the weight of the fine carbonaceous material, and preferably equal to or less than 1/2.
【００１８】上記の細粒炭材と粘結性補填剤とをあらか
じめ混合することによって細粒炭材の表面部に粘結性補
填剤を含浸させるのは、前述した従来の方法のように原
料石炭に炭材と粘結性補填剤とを同時に混合する場合に
比べて粘結性補填剤の使用量を低減できるからである。
細粒炭材と粘結性補填剤とをあらかじめ混合することに
よって炭材と粘結性補填剤とが接触しまたは極近傍に存
在する確率が高くなり、それが従来より少ない量の粘結
性補填剤の添加でコークス強度を効果的に向上させ得る
原因になっていると推察される。The method of impregnating the surface portion of the fine-grained carbon material with the caking filler by previously mixing the fine-grained carbon material and the caking filler is the same as the conventional method described above. This is because the amount of the caking filler used can be reduced as compared with the case where the coal material and the caking filler are simultaneously mixed with coal.
By pre-mixing the fine-grained carbon material and the caking filler, the probability that the carbon material and the caking filler are in contact with or very close to each other is increased, and the caking property is smaller than before. It is presumed that the addition of the filler causes the coke strength to be improved effectively.
【００１９】したがって、本発明方法において、常温で
液状の粘結性補填剤を使用する場合には、細粒炭材と粘
結性補填剤とを単に混合してやれば、細粒炭材の表面部
に粘結性補填剤が含浸した状態にすることができるが、
常温で個体の粘結性補填剤を使用する場合には、粘結性
補填剤を溶融状態まで加温してその状態を保ちながら細
粒炭材と混合するのが好ましい。これによって、炭材の
表面部に粘結性補填剤を含浸させることができる。Therefore, in the method of the present invention, when a caking filler which is liquid at normal temperature is used, the fine carbonaceous material and the caking filler are simply mixed and the surface portion of the fine carbonaceous material is obtained. Can be impregnated with a caking filler,
When using a solid caking filler at room temperature, it is preferable to heat the caking filler to a molten state and mix it with the fine carbonaceous material while maintaining the state. As a result, the surface portion of the carbon material can be impregnated with the caking filler.
【００２０】上記の細粒炭材と粘結性補填剤との混合の
方法について、特に限定はない。ミックスマーラー、ア
イリッヒミキサー等の混合機を用いてもよいし、細粒炭
材をベルトコンベア等で搬送する途中で粘結性補填剤を
適宜添加し、搬送しながら混合する方法を採用すること
も可能である。The method of mixing the fine carbonaceous material and the caking filler is not particularly limited. A mixing machine such as a mix muller or an Erich mixer may be used, or a method in which a caking filler is appropriately added while the fine carbonaceous material is conveyed on a belt conveyor or the like and mixed while being conveyed. Is also possible.
【００２１】細粒炭材として比表面積が５０ｍ2 ／ｇ以
上のものを用いれば、表面積が広いので、混合した粘結
性補填剤のほとんど全てが炭材の気孔内部に強固に保持
されるため、前述した６０℃以上の高温の石炭に添加し
ても、搬送過程で粘着し、あるいは揮発する等の不都合
を生じることなく使用することが可能である。When a fine carbonaceous material having a specific surface area of 50 m 2 / g or more is used, since the surface area is large, almost all of the mixed caking filler is firmly held inside the pores of the carbonaceous material. Even if it is added to the above-mentioned high-temperature coal of 60 ° C. or more, it can be used without causing inconvenience such as sticking or volatilization in the transportation process.
【００２２】次いで、このように粘結性補填剤をあらか
じめ混合してその粘結性補填剤を表面部に含浸させた細
粒炭材を原料石炭に混合した後、その原料石炭を室炉式
コークス炉に装入し、乾留する。Next, after mixing the caking filler in advance and mixing the fine-grained carbon material impregnated on the surface with the caking filler into the raw coal, the raw coal is subjected to a chamber furnace process. Charge into a coke oven and carbonize.
【００２３】粘結性補填剤を含浸させた細粒炭材の原料
石炭への混合量は特に限定されない。しかし、経済性の
面からは少量の方がよく、原料石炭に対して１０重量％
以下とするのが好ましい。なお、混合は、従来、原料石
炭に固形の添加物（粉コークス等の炭材）を混合する際
に用いられている方法に準じて行えばよい。The mixing amount of the fine carbonaceous material impregnated with the caking filler to the raw coal is not particularly limited. However, from the economic point of view, it is better to use a small amount, 10% by weight based on the raw coal.
It is preferable to set the following. The mixing may be performed according to a method conventionally used for mixing a solid additive (a carbon material such as coke breeze) with raw coal.
【００２４】上記本発明方法によれば、乾留温度を上昇
させてもコークスの粒径および高強度を確保することが
でき、しかも粘結性補填剤の使用量を削減することが可
能である。その結果、乾留時間を短縮して生産性の向上
を図ることができる。According to the method of the present invention, the particle size and high strength of coke can be ensured even when the carbonization temperature is raised, and the amount of caking filler used can be reduced. As a result, productivity can be improved by shortening the carbonization time.
【００２５】以下、実施例に基づきさらに詳しく説明す
る。Hereinafter, the present invention will be described in more detail with reference to examples.
【００２６】[0026]
【実施例】（実施例１、比較例１および２）表１に示す
性状の粒径１ｍｍ以下の粉コークス（細粒炭材）１重量
部と、表２に示す性状の常温で固形の石油ピッチ（粘結
性補填剤）０．４重量部とを、石油ピッチが液状を呈す
る２５０℃で混合する処理（以下、粘結性補填剤が液状
を呈する状態での混合処理を「含浸処理」という）を施
した後、常温まで冷却した。EXAMPLES (Example 1, Comparative Examples 1 and 2) 1 part by weight of coke flour (fine carbonaceous material) having a particle size of 1 mm or less as shown in Table 1 and petroleum solid at room temperature having the characteristics shown in Table 2 A process of mixing 0.4 parts by weight of pitch (adhesive filler) at 250 ° C. where petroleum pitch is in a liquid state (hereinafter, a mixing process in a state in which the adhesive filler is in a liquid state is referred to as “impregnation treatment”). ) And cooled to room temperature.
【００２７】このようにして調製した粘結性補填剤含浸
粉コークスを、表３に示す性状の原料石炭に含有量が７
重量％になるように混合した後、炉温１２５０℃の試験
コークス炉（コークス生産能力：２５０ｋｇ／回）に装
炭し、炭中温度（装入石炭中心部の温度）が９５０℃に
なるまで乾留した。乾留後のコークスは直ちに排出して
冷却し、冷却後のコークスについてその品質（粒径およ
び回転強度）を調査した。The coke impregnated powder coke impregnated in this manner was added to the raw coal having the properties shown in Table 3 to have a content of 7%.
After mixing so as to obtain a weight%, coal is charged into a test coke oven (coke production capacity: 250 kg / times) at an oven temperature of 1250 ° C. until the coal temperature (the temperature at the center of the charged coal) reaches 950 ° C. It was carbonized. The coke after the carbonization was immediately discharged and cooled, and the quality (particle size and rotational strength) of the cooled coke was investigated.
【００２８】比較のために、石油ピッチを混合せず、粉
コークスのみを原料石炭に５重量％になるように混合し
た場合、および石油ピッチ、粉コークスのいずれも混合
しない原料石炭のみの場合についても同様の調査をし
た。For comparison, in the case where petroleum pitch was not mixed and only coke flour was mixed with the raw coal so as to be 5% by weight, and in the case where only petroleum pitch and coke fine coke were not mixed, only raw coal was used. Did a similar survey.
【００２９】試験結果を表４の実施例１、比較例１およ
び比較例２に示す。コークス品質の欄の粒径は、篩分離
により求めた平均粒径であり、回転強度は、ＪＩＳ Ｋ
２１５１に規定される方法に準じて測定した１５０回転
後の１５ｍｍ篩上粒分の比率である。The test results are shown in Table 4, Example 1, Comparative Example 1 and Comparative Example 2. The particle size in the column of coke quality is an average particle size obtained by sieving separation, and the rotational strength is determined according to JIS K
It is the ratio of the 15 mm sieve particles after 150 rotations measured according to the method specified in 2151.
【００３０】この結果から明らかなように、石油ピッチ
および粉コークスのいずれも混合しなかった比較例２で
は、コークスの平均粒径が小さく、４７ｍｍであり、粉
コークスのみを混合した比較例１では、平均粒径は改善
されたものの回転強度が大幅に低下した。これに対し
て、粉コークスと石油ピッチをあらかじめ混合した後そ
れを原料石炭に混合した実施例１では、コークスの平均
粒径は改善され、かつ回転強度も維持された高品質のコ
ークスが得られた。As is apparent from the results, in Comparative Example 2 in which neither petroleum pitch nor coke fine was mixed, the average particle size of the coke was small, 47 mm, and in Comparative Example 1 in which only coke fine was mixed. Although the average particle size was improved, the rotational strength was significantly reduced. On the other hand, in Example 1 in which the coke breeze and the petroleum pitch were preliminarily mixed and then mixed with the raw coal, a high-quality coke having an improved average particle size of the coke and maintaining the rotational strength was obtained. Was.
【００３１】（比較例３）前記の表３に示した原料石炭
と表１に示した粉コークスおよび表２に示した石油ピッ
チを、９３：５：２、すなわち実施例１の場合と同じ割
合で、ただし、前記の含浸処理を行わず、常温で、しか
もこれらを同時に混合した後、実施例１の場合と同様に
乾留試験を行い、コークス品質（粒径および回転強度）
を調査した。Comparative Example 3 The raw coal shown in Table 3 above, the coke flour shown in Table 1 and the petroleum pitch shown in Table 2 were mixed at 93: 5: 2, that is, the same ratio as in Example 1. However, without performing the above-mentioned impregnation treatment, at room temperature, and after mixing these at the same time, a carbonization test was performed in the same manner as in Example 1 to obtain coke quality (particle size and rotational strength).
investigated.
【００３２】試験結果を前記の表４に併せて示す（比較
例３参照）。この結果から明らかなように、コークスの
平均粒径は実施例１の場合と同等まで改善されたが、回
転強度の向上が不十分であった。これは、同量の粘結性
補填剤（石油ピッチ）を使用しても、あらかじめ細粒炭
材（粉コークス）と混合することによって細粒炭材の表
面部に粘結性補填剤を含浸させる本発明方法で用いる操
作を行わなかったためである。The test results are shown in Table 4 above (see Comparative Example 3). As is apparent from the results, the average particle size of the coke was improved to the same level as in Example 1, but the improvement of the rotational strength was insufficient. This means that even when the same amount of caking filler (petroleum pitch) is used, the surface of fine carbonaceous material is impregnated with caking filler by mixing it with fine carbonaceous material (coke powder) in advance. This is because the operation used in the method of the present invention was not performed.
【００３３】（実施例２および３）細粒炭材として表５
に示す性状の無煙炭またはオイルコークス（粒径１ｍｍ
以下）を使用し含浸処理を施した以外は実施例１の場合
と同様に乾留試験を行い、コークス品質（粒径および回
転強度）を調査した。(Examples 2 and 3) As fine carbonaceous materials, Table 5
Anthracite or oil coke (grain size 1mm)
The carbonization test (particle size and rotational strength) was conducted in the same manner as in Example 1 except that the impregnation treatment was performed using the following method.
【００３４】試験結果を表４に併せて示す（実施例２お
よび３参照）。この結果から、細粒炭材として無煙炭や
オイルコークスを使用しても、十分高品質のコークスを
製造できることが明らかである。The test results are shown in Table 4 (see Examples 2 and 3). From this result, it is clear that even if anthracite or oil coke is used as the fine carbonaceous material, sufficiently high quality coke can be produced.
【００３５】（実施例４および５）粘結性補填剤として
表６に示す性状のコールタールピッチまたは石油アスフ
ァルトを使用し含浸処理を施した以外は実施例１の場合
と同様に乾留試験を行い、コークス品質（粒径および回
転強度）を調査した。(Examples 4 and 5) A carbonization test was performed in the same manner as in Example 1 except that impregnation was performed using coal tar pitch or petroleum asphalt having the properties shown in Table 6 as a caking filler. The coke quality (particle size and rotational strength) was investigated.
【００３６】試験結果を表４に併せて示す（実施例４お
よび５参照）。この結果から、粘結性補填剤としてコー
ルタールピッチや石油アスファルトを使用しても、十分
高品質のコークスを製造することができた。The test results are shown in Table 4 (see Examples 4 and 5). From these results, it was possible to produce coke of sufficiently high quality even when coal tar pitch or petroleum asphalt was used as a caking filler.
【００３７】[0037]
【表１】 [Table 1]
【００３８】[0038]
【表２】 [Table 2]
【００３９】[0039]
【表３】 [Table 3]
【００４０】[0040]
【表４】 [Table 4]
【００４１】[0041]
【表５】 [Table 5]
【００４２】[0042]
【表６】 [Table 6]
【００４３】（実施例６〜１１）比表面積の異なる３種
類の粉コークスの各々に粉コークスと等量のコールター
ルピッチまたは石油ピッチをそれぞれの軟化点より７０
℃高い温度で混合することによって含浸させ、このピッ
チ含有粉コークスを前記表３に示した性状の原料石炭に
含有量が１０重量％になるように混合し、この混合原料
炭について熱間搬送性を調査した。(Examples 6 to 11) Coal tar pitch or petroleum pitch equivalent to coke flour was added to each of three types of coke flour having different specific surface areas from the softening point by 70%.
The pitch-containing coke powder was mixed with the raw coal having the properties shown in Table 3 so as to have a content of 10% by weight. investigated.
【００４４】図１に用いた試験装置の構成を示す。試験
装置は、原料炭ホッパー１と、周囲をヒーター２で囲ま
れた高温帯３（内径：３０ｍｍ、長さ：５００ｍｍ）
と、切り出しポンプ４を備えており、高温帯３をヒータ
ー２で所定温度に保持した状態で、前記の混合原料炭５
を原料炭ホッパー１から装入し、高温帯３を通過させ、
切り出しポンプ４で２ｋｇ／ｈの一定速度で切り出し
た。この切り出しを４時間連続して実施し、その熱間搬
送性を評価した。すなわち、切り出しを安定して行えた
場合、熱間搬送性は良好とした。FIG. 1 shows the configuration of the test apparatus used. The test apparatus is a high temperature zone 3 surrounded by a raw coal hopper 1 and a heater 2 (inner diameter: 30 mm, length: 500 mm).
And a cut-out pump 4. The high-temperature zone 3 is maintained at a predetermined temperature by the heater 2,
From the coking coal hopper 1 and passed through the high temperature zone 3,
Cutting was performed at a constant speed of 2 kg / h by the cutting pump 4. This cutting was performed continuously for 4 hours, and the hot transportability was evaluated. That is, when the cutting was performed stably, the hot transportability was determined to be good.
【００４５】試験結果を表７に示す。Table 7 shows the test results.
【００４６】粉コークスにコールタールピッチを含浸さ
せた場合（実施例６〜８）、高温帯の温度を２５℃に保
持したときは、粉コークスの比表面積の如何にかかわら
ず、４時間の間、安定して順調に切り出しを行うことが
でき、熱間搬送性は良好（表中に○印で表示）で、混合
原料炭の切り出し量は約８ｋｇであった。When the coke breeze is impregnated with coal tar pitch (Examples 6 to 8), when the temperature of the high temperature zone is maintained at 25 ° C., regardless of the specific surface area of the coke breeze, it takes 4 hours. It was possible to stably and smoothly cut out, the hot transportability was good (indicated by a circle in the table), and the cut-out amount of the mixed raw coal was about 8 kg.
【００４７】高温帯の保持温度を８０℃に上昇させた場
合、粉コークスの比表面積が５５ｍ2 ／ｇおよび１０２
ｍ2 ／ｇのときは熱間搬送性は良好であったが、１３ｍ
2 ／ｇのときは良好ではなく（表中に×印で表示）、混
合原料炭の切り出し量も約４．４ｋｇと少なかった。す
なわち、比表面積の大きい炭材を使用することにより、
搬送性に支障をきたすことなくコールタールピッチを添
加した原料石炭を加熱して水分を低減させ得ることがわ
かる。When the holding temperature of the high-temperature zone was raised to 80 ° C., the specific surface area of the coke breeze was 55 m 2 / g and 102 m 2 / g.
When m 2 / g, the hot transferability was good, but 13 m
When it was 2 / g, it was not good (indicated by x in the table), and the cut-out amount of the mixed raw coal was as small as about 4.4 kg. In other words, by using a carbon material with a large specific surface area,
It can be seen that the raw coal containing the coal tar pitch can be heated to reduce the water content without impairing the transportability.
【００４８】一方、高温帯の保持温度を１８０℃に上昇
させた場合は、粉コークスの比表面積が１０２ｍ2 ／ｇ
であっても切り出し開始から２時間以内に切り出しが不
能となった。試験を中止して高温帯の内部を調査したと
ころ、高温帯の内面に石炭が付着し、棚吊り状態となっ
ていた。On the other hand, when the holding temperature in the high temperature zone was increased to 180 ° C., the specific surface area of the coke breeze was 102 m 2 / g.
However, it became impossible to cut out within 2 hours from the start of cutting. When the test was stopped and the inside of the high-temperature zone was inspected, coal adhered to the inner surface of the high-temperature zone, and was found to be in a suspended state.
【００４９】次に、粉コークスに石油ピッチを含浸させ
た場合（実施例９〜１１）、コールタールピッチを含浸
させた場合に比べて熱間搬送性は良好で、高温帯の保持
温度が８０℃のとき、比表面積が１３ｍ2 ／ｇであって
も安定した切り出しが可能であった。高温帯の保持温度
を１８０℃に上昇させた場合は、比表面積が１３ｍ2／
ｇのとき切り出し量が安定せず、搬送性が不安定であっ
たが、比表面積の大きい粉コークスを用いた場合は、４
時間の間、安定した切り出しが可能であった。Next, when the petroleum pitch was impregnated into the coke breeze (Examples 9 to 11), the hot transportability was better and the holding temperature in the high temperature zone was 80, as compared with the case where the coke breeze was impregnated with coal tar pitch. At ℃, stable cutting was possible even if the specific surface area was 13 m 2 / g. When the holding temperature of the high-temperature zone was increased to 180 ° C., the specific surface area was 13 m 2 /
g, the cut-out amount was not stable and the transportability was unstable. However, when powder coke having a large specific surface area was used, 4 g
During the time, stable cutting was possible.
【００５０】上記の試験結果から、細粒炭材として比表
面積が５０ｍ2 ／ｇ以上のものを用いれば、粘結性補填
剤を添加した原料石炭を水分低減のために加熱しても、
添加した粘結性補填剤が搬送過程で粘着性を示したり、
揮発したりすることがなく、本発明方法を支障なく実施
することが可能であるといえる。From the above test results, when the fine carbonaceous material having a specific surface area of 50 m 2 / g or more is used, even if the raw coal to which the caking filler is added is heated to reduce the moisture,
The added caking filler shows tackiness during the transportation process,
It can be said that the method of the present invention can be carried out without hindrance without volatilization.
【００５１】[0051]
【表７】 [Table 7]
【００５２】[0052]
【発明の効果】本発明方法によれば、乾留温度を上昇さ
せてもコークスの粒径および高強度を確保することがで
き、しかも粘結性補填剤の使用量を削減することができ
る。その結果、乾留時間を短縮して生産性の向上を図る
ことができる。According to the method of the present invention, the particle size and high strength of coke can be ensured even when the carbonization temperature is raised, and the amount of caking filler used can be reduced. As a result, productivity can be improved by shortening the carbonization time.
【図１】混合原料炭の熱間搬送性の調査に用いた試験装
置の構成を示す図である。FIG. 1 is a diagram showing the configuration of a test apparatus used for investigating the hot transportability of mixed coking coal.
１：原料炭ホッパー ２：ヒーター ３：高温帯 ４：切り出しポンプ ５：混合原料炭 1: Coking coal hopper 2: Heater 3: High temperature zone 4: Cutting pump 5: Mixed coking coal
Claims (1)
填剤とをあらかじめ混合して前記炭材の表面部に粘結性
補填剤を含浸させ、この粘結性補填剤を含浸させた細粒
炭材を原料石炭に混合した後、その原料石炭を室炉式コ
ークス炉に装入し、乾留する高品質コークスの製造方
法。A fine carbonaceous material having no softening and melting properties and a caking filler are mixed in advance to impregnate the surface of the carbonaceous material with a caking filler. A method for producing high-quality coke in which impregnated fine-grained carbonaceous material is mixed with raw coal, and then the raw coal is charged into a room-type coke oven and carbonized.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11214669A JP2001040363A (en) | 1999-07-29 | 1999-07-29 | Production of high-quality coke |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11214669A JP2001040363A (en) | 1999-07-29 | 1999-07-29 | Production of high-quality coke |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2001040363A true JP2001040363A (en) | 2001-02-13 |
Family
ID=16659618
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11214669A Pending JP2001040363A (en) | 1999-07-29 | 1999-07-29 | Production of high-quality coke |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2001040363A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113736501A (en) * | 2020-05-29 | 2021-12-03 | 宝山钢铁股份有限公司 | Coke production method based on coking area dust removal ash and coal co-coking |
| KR102410098B1 (en) * | 2021-07-15 | 2022-06-22 | 한국광해광업공단 | High-grade anthracite powder cokes for carbon material and method for producting the same |
| KR20230012182A (en) * | 2021-07-15 | 2023-01-26 | 한국광해관리공단 | And method for producting carbon material from anthracite |
-
1999
- 1999-07-29 JP JP11214669A patent/JP2001040363A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113736501A (en) * | 2020-05-29 | 2021-12-03 | 宝山钢铁股份有限公司 | Coke production method based on coking area dust removal ash and coal co-coking |
| KR102410098B1 (en) * | 2021-07-15 | 2022-06-22 | 한국광해광업공단 | High-grade anthracite powder cokes for carbon material and method for producting the same |
| KR20230012182A (en) * | 2021-07-15 | 2023-01-26 | 한국광해관리공단 | And method for producting carbon material from anthracite |
| KR102623008B1 (en) * | 2021-07-15 | 2024-01-08 | 한국광해광업공단 | And method for producting carbon material from anthracite |
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