JP2000160175A - Briquetting of pulverized coal - Google Patents
Briquetting of pulverized coalInfo
- Publication number
- JP2000160175A JP2000160175A JP10333595A JP33359598A JP2000160175A JP 2000160175 A JP2000160175 A JP 2000160175A JP 10333595 A JP10333595 A JP 10333595A JP 33359598 A JP33359598 A JP 33359598A JP 2000160175 A JP2000160175 A JP 2000160175A
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- Japan
- Prior art keywords
- fine powder
- molding
- coal
- powder
- sieve
- 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.)
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Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、コークス製造に用
いる原料炭の粉炭を、成型用バインダーを用いることな
く加圧成型する方法の改良に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a method for press-molding pulverized coal as raw coal used for coke production without using a molding binder.
【０００２】[0002]
【従来の技術】現在、コークス炉に装入するための粉炭
の成型に際しては、成型炭の強度を維持するため、たと
えば、コールタールピッチ、石油アスファルト、ポリビ
ニルアルコール、パルプ廃液、タール、タール滓などを
バインダーとして用いている。2. Description of the Related Art At present, in molding pulverized coal for charging in a coke oven, for example, coal tar pitch, petroleum asphalt, polyvinyl alcohol, pulp waste liquid, tar, tar slag, etc. are used in order to maintain the strength of the coal. Is used as a binder.
【０００３】また、コークス炉装入炭用として、微粉部
のみを分級して成型したものを用いる場合においても、
その微粉部のみの成型を、次のようにして行っている。 （イ）タール、タール滓などのバインダーを用いて成型
する方法、つまり、粉炭を分級して粗粉と微粉とに分
け、微粉にバインダーを添加混合して加圧成型する方
法。このようにして得た成型品は、先の粗粉と一緒にコ
ークス炉に装入される。 （ロ）加圧成型時に微粉を強制的に押し込んで成型を行
い、ガス体を排気する方法、つまり、粉炭を分級して粗
粉と微粉とに分け、微粉をスクリューフィーダーを経
て、加圧成型に供する方法。そして加圧成型により得た
成型品は、これを先の粗粉と一緒にコークス炉に装入す
る。[0003] Further, in the case of using coke oven charging coal which is obtained by classifying and molding only the fine powder portion,
The molding of only the fine powder portion is performed as follows. (A) A method of molding using a binder such as tar and tar slag, that is, a method of classifying pulverized coal into coarse powder and fine powder, adding a binder to the fine powder, mixing and molding under pressure. The molded product thus obtained is charged together with the coarse powder into a coke oven. (B) The method of forcibly pressing the fine powder during the pressure molding to perform the molding and exhausting the gas body, that is, classifying the pulverized coal and dividing it into coarse powder and fine powder, and pressing the fine powder through the screw feeder and press molding. How to serve. The molded product obtained by the pressure molding is charged into a coke oven together with the coarse powder.
【０００４】以下にあげる出願にも、微粉炭からの成型
炭の製造方法が示されている。[0004] The following application also discloses a method for producing molded coal from pulverized coal.
【０００５】特開昭６１−１８８４８８号公報には、水
分を６重量％以下に調整した微粉炭を酸素濃度を抑制し
た雰囲気下で粘結剤なしに加圧成型し塊成炭となした
後、そのままあるいは解砕して装入炭とするコークス製
造法が示されている。この公報には、それに先立つ従来
技術として、(1) 石炭を乾燥処理して発生する粉塵を集
めて、これに重質油を添加し、１〜３mmに造粒し、これ
を乾燥炭に混合する方法、(2) 石炭を乾燥処理し、微粉
炭と粗粒子炭に分離し、微粉炭にタールを添加してペレ
ットにするかあるいは圧縮成型し、粗粒子炭を混合し、
装入炭とする方法、(3) 微粉炭を結合剤を使用すること
なく平滑ロールでもって塊成化する方法、などがあるこ
とが紹介されている。Japanese Unexamined Patent Publication (Kokai) No. 61-188488 discloses that pulverized coal having a water content adjusted to 6% by weight or less is formed under pressure in an atmosphere in which the oxygen concentration is suppressed without forming a binder to form agglomerated coal. A method of producing coke as it is or by crushing it and charging the coal is described. In this publication, as prior art prior to that, (1) dust generated by drying coal was collected, heavy oil was added, granulated to 1-3 mm, and this was mixed with dry coal. (2) Coal is dried, separated into pulverized coal and coarse coal, tar is added to pulverized coal to form pellets or compression molded, and coarse coal is mixed,
It introduces methods such as charging coal and (3) agglomeration of pulverized coal with smooth rolls without using a binder.
【０００６】特開平５−３３１４７１号公報には、乾燥
微粉原料を相対するロール間で加圧成形するロールコン
パクターが示されている。この公報には、それに先立つ
従来技術として、従来成型炭は、バインダーを添加混合
した微粉原料炭をロールコンパクターにおいて加圧成形
することにより得ていたこと、近年は微粉原料炭を過熱
乾燥した後、バインダーを使用することなくフラット状
ロールを有するロールコンパクターで加圧成型した塊成
炭を使用することが試みられていることにつき言及があ
る。Japanese Patent Application Laid-Open No. 5-331471 discloses a roll compactor for press-forming a dry fine powder material between opposing rolls. In this gazette, as a prior art prior to that, conventionally formed coal was obtained by pressing and molding a fine powder raw coal with a binder added and mixed in a roll compactor, in recent years after overheating and drying the fine powder raw coal, It is mentioned that attempts have been made to use compacted coal compacted with a roll compactor having flat rolls without using a binder.
【０００７】特開平８−１６５４７４号公報には、石炭
を３mm以下の割合が７０重量％以上に粉砕、乾燥した後
に室外コークス炉に装入するコークス用石炭の事前処理
方法において、石炭を乾燥中に少なくとも0.75mm以下の
石炭の微粉を分離、回収した後、該微粉を１０cm3 以上
に塊成し、塊成炭を残りの乾燥した石炭と混合してコー
クス炉に装入するコークス用石炭の事前処理方法が示さ
れている。この公報には、それに先立つ従来技術とし
て、発塵の原因となる微粉を分離して塊成炭となし、残
りの石炭と混合し、コークス炉に装入する方法が紹介さ
れている。Japanese Unexamined Patent Publication No. Hei 8-165474 discloses a method for pre-treating coal for coke which is charged into an outdoor coke oven after pulverizing and drying coal to a proportion of 3 mm or less to 70% by weight or more. After separating and collecting at least 0.75 mm or less of coal fines, the fines are agglomerated to 10 cm 3 or more, and the agglomerated coal is mixed with the remaining dry coal to be charged into a coke oven. A pre-processing method is shown. This publication discloses, as a prior art, a method of separating fine powder causing dust generation into agglomerated coal, mixing the remaining coal with the remaining coal, and charging the coke oven.
【０００８】特開平９−３４５８号公報には、石炭を予
熱乾燥した後、塊成化してコークス炉に装入する石炭の
事前処理方法において、石炭を含水率が０〜 2.7％まで
乾燥後、分級し回収した 0.3mm以下の微粉炭にタールお
よび／またはタール滓を３〜５重量％添加した後、ロー
ル表面に溝凹部を設けたロール成型機で成型する石炭の
事前処理方法が示されている。Japanese Unexamined Patent Publication No. 9-3458 discloses a method of pre-treating coal in which coal is preheat-dried, then agglomerated and charged into a coke oven, wherein the coal is dried to a water content of 0 to 2.7%. A method of pre-treating coal, which is obtained by adding 3 to 5% by weight of tar and / or tar slag to pulverized coal of 0.3 mm or less that has been classified and collected, and then forming the same with a roll forming machine provided with groove recesses on the roll surface, is shown. I have.
【０００９】[0009]
【発明が解決しようとする課題】粉炭を分級し、その微
粉部をバインダーを用いて成型する方法は、バインダー
の分だけ製造コストが高くなるという不利がある。The method of classifying pulverized coal and molding the fine powder using a binder has a disadvantage that the production cost is increased by the amount of the binder.
【００１０】粉炭を分級し、その微粉部をバインダーな
しに加圧成型する方法は、成型品の密度に限界があり、
従ってその強度にも限界がある。また加圧成型時に排気
が必要な場合があり、そのときに微粉が飛散するおそれ
がある。The method of classifying pulverized coal and press-molding the fine powder portion without a binder has a limit in the density of a molded product.
Therefore, its strength is also limited. In some cases, exhaustion is required at the time of pressure molding, and fine powder may be scattered at that time.
【００１１】本発明は、このような背景下において、成
型に際してバインダーを用いない方法でありながら、成
型品の充填密度が向上しかつ強度維持が図られる粉炭の
成型方法を提供することを目的とするものである。Under such a background, an object of the present invention is to provide a method for molding pulverized coal in which the packing density of a molded article is improved and the strength is maintained while using a binder during molding. Is what you do.
【００１２】[0012]
【課題を解決するための手段】本発明の粉炭の成型方法
は、コークスの製造に用いる原料炭のうち、一定粒度以
下の微粉と一定粒度以上の粗粉とを、これら微粉および
粗粉の合計量に対し微粉の割合が９０〜３０重量％とな
るように混合し、ついでその混合物をバインダーを全く
または事実上用いることなく加圧成型することを特徴と
するものである。Means for Solving the Problems In the method for molding pulverized coal of the present invention, of the raw coal used for the production of coke, a fine powder having a certain particle size or less and a coarse powder having a certain particle size or more are obtained by combining the fine powder and the coarse powder. The powder is mixed so that the ratio of the fine powder to the amount is 90 to 30% by weight, and then the mixture is subjected to pressure molding without any or practical use of a binder.
【００１３】[0013]
【発明の実施の形態】以下本発明を詳細に説明する。DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail.
【００１４】本発明においては、石炭を粉砕して、たと
えば３mmとか 2.8mm以下の粒子の割合がたとえば７０重
量％以上となるようにした粉炭を原料として用いる。そ
してこの粉炭を篩分けして、微粉と粗粉とに篩分ける。In the present invention, pulverized coal obtained by pulverizing coal so that the ratio of particles having a size of, for example, 3 mm or less and 2.8 mm or less becomes, for example, 70% by weight or more is used. Then, the pulverized coal is sieved into fine powder and coarse powder.
【００１５】本発明においては、このようにして篩分け
した微粉および粗粉のうち、一定粒度以下の微粉と一定
粒度以上の粗粉とを混合する。In the present invention, among the fine powder and coarse powder sieved as described above, a fine powder having a certain particle size or less and a coarse powder having a certain particle size or more are mixed.
【００１６】このときの微粉と粗粉の粒度は相対的なも
のであるが、細かい目の篩の目をＡmm、粗い目の篩の目
をＢmmとするとき、（Ｂ−Ａ）が 1.2mm以上、さらには
1.8mm以上、殊に 2.5mm以上であることが好ましい。こ
こで微粉は、 0.3mmまたはそれよりも細かい目（たとえ
ば0.25mm）の篩の篩下であることが好ましい。一方粗粉
は、 1.5mmまたはそれよりも粗い目（たとえば 2.8mm）
の篩の篩上であることが好ましい。粗粉の粒度の上限は
５mm程度までである。At this time, the particle size of the fine powder and the coarse powder is relative. When the fine mesh is Amm and the coarse mesh is Bmm, (BA) is 1.2 mm. Above
It is preferably at least 1.8 mm, especially at least 2.5 mm. Here, the fine powder is preferably under a sieve having a mesh of 0.3 mm or finer (for example, 0.25 mm). On the other hand, coarse powder has a grain size of 1.5 mm or more (for example, 2.8 mm)
Is preferably on the sieve. The upper limit of the particle size of the coarse powder is up to about 5 mm.
【００１７】そして本発明においては、上記粒度を有す
る微粉と粗粉とを、これら微粉および粗粉の合計量に対
し微粉の割合が９０〜３０重量％となるように混合す
る。微粉の割合が９０重量％を越えるときには、成型時
に石炭の微粉の飛散率が大きいため、成型時の成型歩留
が少ない。また成型品の充填密度が一定以上には向上せ
ず、充分な強度が得られない。従って、成型品の粉化試
験での粉化率が大きく、粉化試験後の総成型歩留が少な
くなる。一方、微粉の割合が３０重量％未満の場合は、
粗粉同士が近接するため加圧成型時に粗粉を押し潰す現
象が見られ、成型することが難しくなる。微粉の割合の
上限は、好ましくは８５重量％以下、さらに好ましくは
８０重量％以下、殊に７０重量％以下である。In the present invention, the fine powder having the above particle size and the coarse powder are mixed so that the ratio of the fine powder to the total amount of the fine powder and the coarse powder is 90 to 30% by weight. When the proportion of the fine powder exceeds 90% by weight, the scattering rate of the fine powder of coal is large at the time of molding, so that the molding yield at the time of molding is small. Further, the packing density of the molded product is not improved to a certain level or more, and sufficient strength cannot be obtained. Therefore, the powdering rate of the molded product in the powdering test is large, and the total molding yield after the powdering test is reduced. On the other hand, when the proportion of the fine powder is less than 30% by weight,
Since the coarse powders are close to each other, a phenomenon of crushing the coarse powders at the time of pressure molding is observed, which makes it difficult to mold. The upper limit of the proportion of the fine powder is preferably 85% by weight or less, more preferably 80% by weight or less, and particularly preferably 70% by weight or less.
【００１８】上記のように微粉と粗粉とを混合した後
は、その混合物をバインダーを全くまたは事実上用いる
ことなく加圧成型に供する。バインダーを「事実上」用
いないとは、本発明の趣旨に寄与しない単なる名目量の
バインダーの配合を行っても、本発明から外れることに
はならないという意味である。After the fine powder and the coarse powder are mixed as described above, the mixture is subjected to pressure molding without any or practical use of a binder. "Essentially" using no binder means that the incorporation of a mere nominal amount of binder that does not contribute to the spirit of the invention does not depart from the invention.
【００１９】このようにして得た成型品は、粗粉と一緒
にコークス炉に装入され、乾留に供される。The molded product thus obtained is charged together with the coarse powder into a coke oven and subjected to dry distillation.
【００２０】〈作用〉従来においては、バインダーを用
いない方法にあっても、微粉のみから成型品を得てい
る。これに対し本発明においては、微粉および粗粉を特
定の割合で混合してバインダーなしで加圧成型を行って
いる。図１は成型品のモデル図であり、（イ）は微粉の
みを用いたときの成型品、（ロ）は微粉と粗粉の混合物
を用いたときの成型品を示してある。（ロ）にあっては
粗粉粒子間に微粉粒子が入り込むので、（イ）に比し加
圧成型に際して成型品の充填密度が向上し、成型品の強
度維持が達成できる。<Effect> Conventionally, a molded product is obtained only from fine powder, even in a method using no binder. On the other hand, in the present invention, the fine powder and the coarse powder are mixed at a specific ratio and pressure-molded without a binder. FIG. 1 is a model diagram of a molded product. FIG. 1A shows a molded product when only fine powder is used, and FIG. 1B shows a molded product when a mixture of fine powder and coarse powder is used. In (b), the fine powder particles enter between the coarse powder particles, so that the packing density of the molded product is improved during pressure molding as compared with (a), and the strength of the molded product can be maintained.
【００２１】[0021]
【実施例】次に実施例をあげて本発明をさらに説明す
る。The present invention will be further described with reference to the following examples.
【００２２】実施例１〜４、比較例１〜２ 〈粉炭の成型〉粉炭の成型を以下のように実施した。 （１）使用炭：2.80mm篩下が７６％で、水分 2.4％に調
整を行ったコークス用原料炭を使用した。 （２）篩分け：上記使用炭を2.80mmと0.25mmの篩で篩分
け、2.80mm篩上の部分を粗粉部、0.25mm篩下の部分を微
粉部とした。 （３）混合：下記の表１のように６レベルの割合で粗粉
部と微粉部とを混合し、各混合試料を油圧式レシプロ成
型機を用いてバインダーなしで加圧成型した。 （４）成型：成型機により、成型容器容積５０cm3 のカ
ップを用い、ピストン降下速度 0.5 m/min、成型圧19.6
×１０6 Pa、加圧時間１０sec の条件で成型品を作製し
た。Examples 1 to 4 and Comparative Examples 1 and 2 <Molding of coal powder> Molding of coal powder was carried out as follows. (1) Coal used: Coking coking coal adjusted to a 2.80 mm sieve with a sieve of 76% and a water content of 2.4% was used. (2) Sieving: The charcoal used was sieved with 2.80 mm and 0.25 mm sieves, and the portion above the 2.80 mm sieve was regarded as a coarse powder portion and the portion below the 0.25 mm sieve was regarded as a fine powder portion. (3) Mixing: As shown in Table 1 below, the coarse powder portion and the fine powder portion were mixed at a ratio of 6 levels, and each mixed sample was pressure-molded without a binder using a hydraulic reciprocating molding machine. (4) Molding: Using a molding machine, a cup with a molding container volume of 50 cm 3 , a piston descending speed of 0.5 m / min, and a molding pressure of 19.6
A molded article was produced under the conditions of × 10 6 Pa and a pressurization time of 10 sec.
【００２３】〈粉化試験〉各実施例および比較例で成型
された成型品を0.25mmのＪＩＳ篩にのせて、ハンマー振
とう機にて振動数２９０ r/min、ハンマーリング１６５
r/minの条件で１分間振動させた後、0.25mm篩下に落ち
た重量を測定し、試験前成型品重量に対する割合を粉化
率とした。<Pulverization test> The molded products molded in each of the examples and comparative examples were placed on a 0.25 mm JIS sieve, and the vibration frequency was 290 r / min and the hammer ring was 165 with a hammer shaker.
After vibrating for 1 minute under the condition of r / min, the weight dropped under a 0.25 mm sieve was measured, and the ratio to the weight of the molded product before the test was defined as the powdering ratio.
【００２４】〈テスト結果〉実施例および比較例で得た
成型品の成型状況および成型品の粉化試験による結果を
表１にまとめた。表１の試験結果の項の説明は次のとお
りである。 ・成型時歩留：加圧成型するときの、試料供給重量に対
する成型品の重量割合である。 ・成型時飛散率：加圧成型するとき、成型されず飛散し
た粉体試料の重量割合であり、１００％から上記の成型
時歩留％を引いたものに相当する。 ・粉化試験粉化率：粉化試験において、成型品のうち壊
れて粉化した試料重量の割合である。 ・粉化試験後総成型歩留：成型時に供給した試料重量に
対する粉化試験後成型品として残った試料の重量割合で
ある。<Test Results> Table 1 summarizes the molding conditions of the molded products obtained in Examples and Comparative Examples and the results of a powdering test of the molded products. The description of the test result section in Table 1 is as follows. Molding yield: The weight ratio of the molded product to the sample supply weight when performing pressure molding. The scattering rate at the time of molding: the weight ratio of the powder sample which was not molded and scattered during the pressure molding, and corresponds to a value obtained by subtracting the above-mentioned molding yield% from 100%. -Powdering test Powdering ratio: The ratio of the weight of the sample that was broken and powdered in the molded product in the powdering test. -Total molding yield after powdering test: The weight ratio of the sample remaining as a molded product after the powdering test to the sample weight supplied at the time of molding.
【００２５】[0025]
【表１】 比較例 実 施 例 1 2 1 2 3 4 成型試料の配合条件 0.25mm篩下（微粉部） 100 20 80 65 50 35 の配合割合 (%) 2.80mm篩上（粗粉部） 0 80 20 35 50 65 の配合割合 (%) 成型試料供給重量 (g) 55 55 55 55 55 55 試験結果 成型時の成型歩留 (%) 58.7 # 74.0 80.6 84.7 93.6 成型時の飛散率 (%) 41.3 # 26.0 19.4 15.3 6.4 粉化試験の粉化率 (%) 92.0 # 51.1 30.4 0.6 0.4 粉化試験後の総成型 4.7 # 36.2 56.1 84.2 93.2 歩留 (%) （# 成型が困難） [Table 1] Comparative example Example 1 2 1 2 3 4 Mixing condition of molded sample 0.25mm sieving (fine powder) 100 20 80 65 50 35 mixing ratio (%) 2.80mm sieving (coarse powder) 0 80 20 35 50 65 mixing ratio (%)Molded sample supply weight (g) 55 55 55 55 55 55 Test results Molding yield during molding (%) 58.7 # 74.0 80.6 84.7 93.6 Scattering rate during molding (%) 41.3 # 26.0 19.4 15.3 6.4 Powdering rate in powdering test (%) 92.0 # 51.1 30.4 0.6 0.4 Powdering test Total molding after 4.7 # 36.2 56.1 84.2 93.2Yield (%) (# Difficult to mold)
【００２６】図２に粉炭成型時の微粉混合率と微粉飛散
率との関係を示した。また図３に粉炭成型試料中の微粉
混合率と粉化試験での粉化率との関係を示した。FIG. 2 shows the relationship between the fine powder mixing ratio and the fine powder scattering ratio during pulverized coal molding. FIG. 3 shows the relationship between the mixing ratio of fine powder in the pulverized coal molded sample and the pulverization rate in the pulverization test.
【００２７】〈解析〉微粉のみの成型品である比較例１
においては、成型時に41.3％の試料が成型されずに飛散
している。これに対し、微粉と粗粉とを８０：２０、６
５：３５、５０：５０、３５：６５の割合で混ぜた実施
例１〜４においては、成型時の飛散率はこの順に26.0
％、19.4％、15.3％、 6.4％であり、粗粉を混ぜない比
較例１と比べ粉化率は低減し、成型時歩留が向上してい
る。<Analysis> Comparative Example 1 which is a molded product of only fine powder
In, 41.3% of the sample was scattered without being molded at the time of molding. On the other hand, fine powder and coarse powder were mixed at 80:20, 6
In Examples 1-4 mixed at the ratio of 5:35, 50:50, 35:65, the scattering rate at the time of molding was 26.0 in this order.
%, 19.4%, 15.3%, and 6.4%, and the powdering ratio is lower than that of Comparative Example 1 in which coarse powder is not mixed, and the yield during molding is improved.
【００２８】微粉のみの成型品である比較例１において
は、粉化試験で成型品の92.0％が粉化している。これに
対し、微粉と粗粉とを上記の割合で混ぜた実施例１〜４
においては、粉化試験の粉化率はこの順に51.1％、30.4
％、 0.6％、 0.4％であり、粗粉を混ぜない比較例１と
比べて粉化率は著しく低減し、塊として残る割合は向上
している（つまり成型品の強度が向上している）。In Comparative Example 1 in which only the fine powder was molded, 92.0% of the molded product was powdered in the powdering test. In contrast, Examples 1 to 4 in which fine powder and coarse powder were mixed in the above ratios
, The powdering rate of the powdering test was 51.1% and 30.4% in this order.
%, 0.6%, and 0.4%. Compared to Comparative Example 1 in which coarse powder was not mixed, the powdering rate was significantly reduced, and the proportion remaining as a lump was improved (that is, the strength of the molded product was improved). .
【００２９】微粉のみの成型品である比較例１において
は、成型時に供給した試料重量に対して粉化試験後に成
型品として残る歩留（粉化試験後総成型歩留）は 4.7％
である。これに対し、微粉と粗粉とを上記の割合で混ぜ
た実施例１〜４においては、粉化試験後総成型歩留はこ
の順に36.2％、56.1％、84.2％、93.2％であり、比較例
１と比べて高い値を示している。In Comparative Example 1, which is a molded product containing only fine powder, the yield remaining as a molded product after the pulverization test (total molding yield after the pulverization test) is 4.7% based on the sample weight supplied at the time of molding.
It is. In contrast, in Examples 1 to 4 in which the fine powder and the coarse powder were mixed at the above ratio, the total molding yield after the powdering test was 36.2%, 56.1%, 84.2%, and 93.2% in this order. The value is higher than that of Example 1.
【００３０】これらのことから、微粉と粗粉とを特定範
囲の割合で混合することにより、 ・成型時に飛散する粉が低減し、成型品の歩留の向上が
認められること、 ・成型品の粉化試験での粉化率が低減し、成型品の強度
の向上が認められることがわかる。ただし、比較例２の
ように、微粉の割合が過少で粗粉の割合が過多であると
きは、成型品自体を得ることができない。From these facts, by mixing the fine powder and the coarse powder in a specific range, it is possible to reduce powder scattered during molding and to improve the yield of molded products. It can be seen that the pulverization rate in the pulverization test was reduced and the strength of the molded article was improved. However, when the proportion of the fine powder is too small and the proportion of the coarse powder is too large as in Comparative Example 2, the molded product itself cannot be obtained.
【００３１】[0031]
【発明の効果】本発明に従って微粉に粗粉の量を制御し
て混合し、バインダーなしで加圧成型することにより、
次のようなすぐれた効果が奏される。 １．加圧成型時の飛散粉量が低下し、成型歩留が向上す
る。 ２．成型品の強度が向上する。 ３．成型のためのバインダーを必要としない。混入装置
を含め、成型コストの低減が可能となる。 ４．微粉部の成型によって、コークス炉に搬入する装入
炭の微粉量が低減され、搬送途中の発塵量の低下が図ら
れる。これにより環境面の改善となる。 ５．同じくコークス炉に装入する微粉の量が低減でき、
コークス炉装入中発生する発塵量は低減し、乾留ガス集
配配管に同伴される微粉量（キャリーオーバー量）が低
減できる。これにより、タール中の微粉量が低下でき、
タールの品位向上となる。According to the present invention, the amount of the coarse powder is controlled and mixed with the fine powder, and the mixture is molded under pressure without a binder.
The following excellent effects are achieved. 1. The amount of scattered powder during pressure molding is reduced, and the molding yield is improved. 2. The strength of the molded product is improved. 3. No binder is required for molding. The molding cost can be reduced, including the mixing device. 4. Due to the molding of the fine powder portion, the fine powder amount of the coal charged into the coke oven is reduced, and the amount of dust generated during the transportation is reduced. This leads to environmental improvements. 5. Similarly, the amount of fine powder charged into the coke oven can be reduced,
The amount of dust generated during charging in the coke oven is reduced, and the amount of fine powder (carry-over amount) entrained in the carbonized gas collection and distribution pipe can be reduced. As a result, the amount of fine powder in the tar can be reduced,
Tar quality is improved.
【図１】図１は成型品のモデル図であり、（イ）は微粉
のみを用いたときの成型品、（ロ）は微粉と粗粉の混合
物を用いたときの成型品を示してある。FIG. 1 is a model diagram of a molded product, in which (a) shows a molded product when only fine powder is used, and (b) shows a molded product when a mixture of fine powder and coarse powder is used. .
【図２】粉炭成型時の微粉混合率と微粉飛散率との関係
を示したグラフである。FIG. 2 is a graph showing the relationship between the fine powder mixing ratio and the fine powder scattering ratio during pulverized coal molding.
【図３】粉炭成型試料中の微粉混合率と粉化試験での粉
化率との関係を示したグラフである。FIG. 3 is a graph showing a relationship between a mixing ratio of fine powder in a pulverized coal molded sample and a pulverization rate in a pulverization test.
Claims (2)
定粒度以下の微粉と一定粒度以上の粗粉とを、これら微
粉および粗粉の合計量に対し微粉の割合が９０〜３０重
量％となるように混合し、ついでその混合物をバインダ
ーを全くまたは事実上用いることなく加圧成型すること
を特徴とする粉炭の成型方法。(1) Among raw coal used for the production of coke, a fine powder having a certain particle size or less and a coarse powder having a certain particle size or more are mixed at a ratio of 90 to 30% by weight to the total amount of the fine powder and the coarse powder. A method for molding pulverized coal, characterized in that the mixture is mixed under pressure and then the mixture is subjected to pressure molding without any or practical use of a binder.
をＢmmとするとき、微粉は 0.3mmまたはそれよりも細か
い目の篩の篩下であり、粗粉は 1.5mmまたはそれよりも
粗い目の篩の篩上であり、かつ（Ｂ−Ａ）が 1.2mm以上
である請求項１記載の粉炭の成型方法。2. When the fine mesh is Amm and the coarse mesh is Bmm, the fine powder is below 0.3 mm or finer sieve and the coarse powder is 1.5 mm or less. The method for molding pulverized coal according to claim 1, wherein the coal is on a coarser sieve and (BA) is 1.2 mm or more.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33359598A JP3996285B2 (en) | 1998-11-25 | 1998-11-25 | Molding method of pulverized coal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33359598A JP3996285B2 (en) | 1998-11-25 | 1998-11-25 | Molding method of pulverized coal |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2000160175A true JP2000160175A (en) | 2000-06-13 |
| JP3996285B2 JP3996285B2 (en) | 2007-10-24 |
Family
ID=18267806
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP33359598A Expired - Fee Related JP3996285B2 (en) | 1998-11-25 | 1998-11-25 | Molding method of pulverized coal |
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| Country | Link |
|---|---|
| JP (1) | JP3996285B2 (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007146013A (en) * | 2005-11-29 | 2007-06-14 | Sumitomo Metal Ind Ltd | Charging method for coal |
| WO2011132828A1 (en) * | 2010-04-21 | 2011-10-27 | 한국에너지기술연구원 | Method for manufacturing solid fuel with binder material and carbon source mixed, and solid fuel manufactured by using the same |
| WO2012137956A1 (en) * | 2011-04-06 | 2012-10-11 | 株式会社神戸製鋼所 | Solid fuel molding method |
| JP2014214200A (en) * | 2013-04-24 | 2014-11-17 | 株式会社神戸製鋼所 | Method for producing molded solid fuel |
| WO2015098329A1 (en) * | 2013-12-24 | 2015-07-02 | 三菱重工業株式会社 | Formed coal production method |
| JP2018044126A (en) * | 2016-09-16 | 2018-03-22 | 新日鐵住金株式会社 | Manufacturing method of coke |
| JP2021004302A (en) * | 2019-06-26 | 2021-01-14 | 日本製鉄株式会社 | Method for producing coke |
| CN115161087A (en) * | 2022-07-12 | 2022-10-11 | 龙佰武定钛业有限公司 | Recycling method of fine-grain anthracite |
-
1998
- 1998-11-25 JP JP33359598A patent/JP3996285B2/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007146013A (en) * | 2005-11-29 | 2007-06-14 | Sumitomo Metal Ind Ltd | Charging method for coal |
| WO2011132828A1 (en) * | 2010-04-21 | 2011-10-27 | 한국에너지기술연구원 | Method for manufacturing solid fuel with binder material and carbon source mixed, and solid fuel manufactured by using the same |
| WO2012137956A1 (en) * | 2011-04-06 | 2012-10-11 | 株式会社神戸製鋼所 | Solid fuel molding method |
| JP2014214200A (en) * | 2013-04-24 | 2014-11-17 | 株式会社神戸製鋼所 | Method for producing molded solid fuel |
| WO2015098329A1 (en) * | 2013-12-24 | 2015-07-02 | 三菱重工業株式会社 | Formed coal production method |
| JP2018044126A (en) * | 2016-09-16 | 2018-03-22 | 新日鐵住金株式会社 | Manufacturing method of coke |
| JP2021004302A (en) * | 2019-06-26 | 2021-01-14 | 日本製鉄株式会社 | Method for producing coke |
| JP7216338B2 (en) | 2019-06-26 | 2023-02-01 | 日本製鉄株式会社 | coke production method |
| CN115161087A (en) * | 2022-07-12 | 2022-10-11 | 龙佰武定钛业有限公司 | Recycling method of fine-grain anthracite |
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|---|---|
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