JP4837436B2 - Method for producing pseudo-granulated product - Google Patents

Method for producing pseudo-granulated product Download PDF

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JP4837436B2
JP4837436B2 JP2006127730A JP2006127730A JP4837436B2 JP 4837436 B2 JP4837436 B2 JP 4837436B2 JP 2006127730 A JP2006127730 A JP 2006127730A JP 2006127730 A JP2006127730 A JP 2006127730A JP 4837436 B2 JP4837436 B2 JP 4837436B2
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pulverized coal
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kneader
binder
granulated product
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顕 高橋
雄一 山村
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Nippon Steel Corp
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Description

本発明はコークス炉に装入するための微粉炭にバインダーを添加混練して擬似造粒物を製造する擬似造粒物の製造方法に関する。 The present invention relates to a method for producing a pseudo-granulated product in which a pseudo-granulated product is produced by adding and kneading a binder to pulverized coal for charging into a coke oven.

パドル型の混練機の一端側から投入された微粉炭にバインダーを供給し、このバインダーが供給された微粉炭を他端側に向かって混練させながら移動させることにより、微粉炭を主成分とした擬似造粒物を生成する混練機が知られている。この混練機で得られた擬似造粒物は、混練機の他端側から排出された後、そのままコークス炉に装入されたり、又はロールコンパクタにおいて平板状に塊成化され、コークス炉に装入される（例えば、特許文献１参照）。
特開平１０−２３７４５５号公報 By supplying a binder to the pulverized coal introduced from one end side of the paddle type kneader, and moving the pulverized coal supplied with this binder toward the other end side while kneading, the pulverized coal is the main component. A kneader for producing a pseudo-granulated product is known. The pseudo-granulated product obtained by this kneader is discharged from the other end of the kneader and then charged into a coke oven as it is, or agglomerated in a plate shape in a roll compactor and loaded into the coke oven. (For example, refer to Patent Document 1).
Japanese Patent Laid-Open No. 10-237455

また、近年、コークス炉での乾留時間を短縮するために装入する石炭の温度を高くすることが行われつつある。   In recent years, the temperature of coal to be charged is being increased to shorten the carbonization time in the coke oven.

しかしながら、混練機で混練する微粉炭の温度が１００℃以上になると、一旦擬似粒化した微粉炭及びバインダーが混練機の排出口に到達する前に、混練機の攪拌作用によって分離し、そのため例えばロールコンパクタで塊成化処理しても、十分に塊成化することができなかった。   However, when the temperature of the pulverized coal kneaded by the kneader becomes 100 ° C. or higher, the pulverized coal and binder once pseudo-granulated are separated by the stirring action of the kneader before reaching the discharge port of the kneader, for example, Even if the agglomeration treatment was performed with a roll compactor, the agglomeration could not be sufficiently achieved.

また、微粉炭の温度が１００℃以上である場合、微粉炭の投入量に応じて擬似粒化するまでの時間が変動する。そこで、本願発明は、投入される微粉炭の温度や量が変わっても混練機で製造する微粉炭の擬似造粒物の粒度が目標範囲内に安定的に維持される擬似造粒物の製造方法を提供することを目的とする。   Moreover, when the temperature of pulverized coal is 100 degreeC or more, the time until quasi-granulation changes according to the input amount of pulverized coal. Therefore, the present invention is the production of a pseudo-granulated product in which the particle size of the pseudo-granulated product of pulverized coal produced with a kneader is stably maintained within the target range even if the temperature or amount of the pulverized coal to be input is changed. It aims to provide a method.

上記課題を解決するために、本願発明の擬似造粒物の製造方法は、混練機内において混練されながら一方向に搬送される微粉炭に対してバインダーを供給することにより、コークス炉装入用の擬似造粒物を製造する擬似造粒物の製造方法であって、前記混練機に投入される前記微粉炭の投入温度及び／又は微粉炭の投入量に応じて、前記バインダーの供給位置を、前記混練機による前記微粉炭の搬送方向において調整することを特徴とする。   In order to solve the above-mentioned problems, the method for producing a pseudo-granulated product of the present invention is a method for charging a coke oven by supplying a binder to pulverized coal conveyed in one direction while being kneaded in a kneader. A method for producing a pseudo-granulated product for producing a pseudo-granulated product, wherein, depending on the input temperature of the pulverized coal and / or the amount of pulverized coal input to the kneader, the supply position of the binder, It adjusts in the conveyance direction of the said pulverized coal by the said kneader.

ここで、前記混練機内への微粉炭投入温度が１００℃以上の場合において、該微粉炭の投入温度が上昇するのに応じて、前記バインダーの供給位置を、前記微粉炭の搬送方向下流側に設定するとよい。   Here, when the charging temperature of the pulverized coal into the kneader is 100 ° C. or higher, the supply position of the binder is moved downstream in the conveying direction of the pulverized coal as the charging temperature of the pulverized coal increases. It is good to set.

また、前記混練機内への微粉炭投入温度が１００℃以上の場合において、該混練機内への微粉炭投入量が低下するのに応じて、前記バインダーの供給位置を、前記微粉炭の搬送方向下流側に設定するとよい。   Further, when the pulverized coal charging temperature into the kneading machine is 100 ° C. or higher, the supply position of the binder is set downstream in the conveying direction of the pulverized coal as the amount of pulverized coal charging into the kneading machine decreases. Set to the side.

さらに、前記混練機による混練後の前記擬似造粒物の粒度分布が、６００〜５０００μｍの粒が３５〜５０重量％、７５μｍ以下の粒が５〜１５重量％になるようにするとよい。   Furthermore, the particle size distribution of the pseudo granulated product after kneading by the kneader may be such that particles of 600 to 5000 μm are 35 to 50% by weight and particles of 75 μm or less are 5 to 15% by weight.

本願発明によれば、微粉炭の投入量及び／又は投入温度に応じて、バインダーの投入位置を混練機による微粉炭の搬送方向において調整しているため、バインダーが添加された後の混練時間が調整され、所定範囲内の粒径を有する擬似造粒物を安定して得ることができる。   According to the present invention, since the input position of the binder is adjusted in the conveying direction of the pulverized coal by the kneader according to the input amount and / or input temperature of the pulverized coal, the kneading time after the binder is added A pseudo-granulated product that is adjusted and has a particle size within a predetermined range can be stably obtained.

図１を参照して、本発明の成型炭の製造方法を有効に実施するための成型炭の製造システムの概要を説明する。   With reference to FIG. 1, the outline | summary of the manufacturing system of the forming coal for implementing effectively the manufacturing method of the forming coal of this invention is demonstrated.

混練機１は、微粉炭を図中左側から右側に向かって搬送しながら混練し、その搬送途中において混練器上部からバインダーを添加し、微粉炭及びバインダーを混練して得られた擬似造粒物をホッパー装置３に排出する。   The kneading machine 1 kneads while conveying pulverized coal from the left side to the right side in the figure, adds a binder from the upper part of the kneader during the conveyance, and a pseudo-granulated product obtained by kneading the pulverized coal and the binder. Is discharged into the hopper device 3.

ホッパー装置３に排出された擬似造粒物は、所定量ずつシュート４内に落下供給される。シュート４内に供給された擬似造粒物は、押し込みパドル６によって、シュート４の先端部から押し出され、成型機７に供給され、一対の圧延ロール７ａによって塊成化されることにより、平板状の成型炭に成型される（固められる）。   The pseudo granulated material discharged to the hopper device 3 is dropped and supplied into the chute 4 by a predetermined amount. The pseudo-granulated material supplied into the chute 4 is pushed out from the tip end portion of the chute 4 by the push-in paddle 6, supplied to the molding machine 7, and agglomerated by the pair of rolling rolls 7a. It is molded (hardened) into a coal.

成型機７において成型された成型炭は、不図示のコークス炉に装入される。   The charcoal molded in the molding machine 7 is charged into a coke oven (not shown).

次に、混練機１及び混練機１内の微粉炭に対してバインダーを添加するノズルの構成について詳細に説明する。   Next, the structure of the nozzle which adds a binder with respect to the kneading machine 1 and the pulverized coal in the kneading machine 1 will be described in detail.

混練機１は水平方向に延びる円筒型の混練機本体４１を有しており、この混練機本体４１の内側には、パドル４２が回転可能に設けられている。パドル４２は、図中水平方向に延びる回転軸４２ａの外周面に複数の混練翼４２ｂを設けた構成となっており、微粉炭を混練しながら図中左側から右側方向に向かって搬送する。回転軸４２ａは、不図示の一対のラジアル式軸受けに回転可能に支持されており、回転モータ４３によって回転駆動される。   The kneader 1 has a cylindrical kneader main body 41 extending in the horizontal direction. A paddle 42 is rotatably provided inside the kneader main body 41. The paddle 42 has a configuration in which a plurality of kneading blades 42b are provided on the outer peripheral surface of a rotating shaft 42a extending in the horizontal direction in the drawing, and conveys pulverized coal from the left side to the right side in the drawing. The rotation shaft 42 a is rotatably supported by a pair of radial bearings (not shown) and is driven to rotate by a rotation motor 43.

混練機本体４１の搬送始端側には、混練機４上方から混練機本体４１の内側に微粉炭を供給するための微粉炭投入口４１ａが設けられており、搬送終端側には、パドル４２の混練作用によって得られた微粉炭及びバインダーからなる擬似造粒物を排出するための擬似造粒物排出口４１ｂが設けられている。   A pulverized coal inlet 41a for supplying pulverized coal from above the kneader 4 to the inside of the kneader main body 41 is provided on the conveyance start end side of the kneader main body 41, and a paddle 42 of the paddle 42 is provided on the conveyance end side. A pseudo-granulated product discharge port 41b is provided for discharging a pseudo-granulated product made of pulverized coal and a binder obtained by the kneading action.

混練機１の上方には、混練機本体４１内の微粉炭に対してバインダーを添加するためのノズル５が配置されており、このノズル５は、混練機１による微粉炭の搬送方向に沿って複数設置されており、各ノズル５にはバルブを介設したバインダー供給管（共に不図示）が予め連結され、このバルブの開閉によりバインダーを供給するノズル５を選択することが好ましく、これにより、前記バインダーの添加位置が調整可能としている。このように、ノズル５によるバインダーの添加位置を調整可能としたのは、バインダー及び微粉炭を混練することによって得られた擬似造粒物を構成する各擬似粒子の粒径が所定範囲内でないと、成型機７で成型化することができない（固まらない）からである。   Above the kneader 1, a nozzle 5 for adding a binder to the pulverized coal in the kneader main body 41 is arranged, and this nozzle 5 is along the conveying direction of the pulverized coal by the kneader 1. It is preferable to select a nozzle 5 for supplying a binder by opening and closing the valve. A binder supply pipe (both not shown) provided with a valve is connected to each nozzle 5 in advance. The addition position of the binder can be adjusted. Thus, the addition position of the binder by the nozzle 5 can be adjusted because the particle size of each pseudo particle constituting the pseudo granulated product obtained by kneading the binder and pulverized coal is not within a predetermined range. This is because it cannot be formed (does not solidify) by the molding machine 7.

ここでいう所定範囲とは、粒径６００〜５０００μｍの擬似粒子が３５〜５０重量％、粒径７５μｍ以下の擬似粒子が５〜１５重量％であることを意味する。   The predetermined range here means that 35 to 50% by weight of pseudo particles having a particle size of 600 to 5000 μm and 5 to 15% by weight of pseudo particles having a particle size of 75 μm or less.

ここで、図２を用いて、擬似粒子について説明する。図２は、微粉炭が擬似粒子化する様子を図示した模式図であり、図中左側が擬似粒子化する前のバインダーが付着した微粉炭であり、図中右側が擬似粒子化した微粉炭の状態を図示している。   Here, the pseudo particles will be described with reference to FIG. FIG. 2 is a schematic diagram illustrating how the pulverized coal is pseudo-particled. The left side of the diagram is the pulverized coal to which the binder before pseudo-particles is attached, and the right side of the diagram is the pulverized coal that has been quasi-particled. The state is illustrated.

微粉炭及びバインダーが所定時間混練されると、バインダーの粘性力により微粉炭の各粒子が結合する。この結合化した状態を擬似粒子化といい、擬似粒子化した擬似粒子の粒径が上述した所定の範囲内とならない場合には、成型機７において成型化することができない（固まらない）。
そこで、擬似造粒物排出口４１ｂから排出される擬似造粒物を構成する擬似粒子の粒度分布が所定範囲内となるようにバインダーの添加位置を調整する必要がある。 When the pulverized coal and the binder are kneaded for a predetermined time, the particles of the pulverized coal are bound by the viscous force of the binder. This combined state is called pseudo-particle formation, and when the particle size of the pseudo-particles formed into pseudo particles does not fall within the above-described predetermined range, it cannot be molded (does not solidify) in the molding machine 7.
Therefore, it is necessary to adjust the addition position of the binder so that the particle size distribution of the pseudo particles constituting the pseudo granulated product discharged from the pseudo granulated product discharge port 41b is within a predetermined range.

すなわち、微粉炭の温度が高い場合には、短い混練時間で径の大きな（６００〜５０００μｍ）擬似粒子の割合が増えるため、混練時間を長く設定すると一旦擬似粒子化した各微粉炭が分離して、擬似粒子の粒径が小さくなりすぎて成型機７において成型化できなくなる。   That is, when the temperature of the pulverized coal is high, the proportion of pseudo particles having a large diameter (600 to 5000 μm) increases in a short kneading time. Therefore, if the kneading time is set long, each pulverized coal once converted into pseudo particles is separated. The particle size of the pseudo particles becomes too small to be molded in the molding machine 7.

微粉炭の温度が１００℃以上である場合には、微粉炭の温度が同じでも、微粉炭の投入量の増減に応じてバインダーの添加位置を調整する必要がある。すなわち、微粉炭の投入量を増加すると混練機内における微粉炭レベル（又は充填率）が高くなって攪拌状態が悪化する傾向があり、これを防止するために、混練機内の微粉炭レベルを一定に維持する様に混練機内の微粉炭の移動速度を上昇させる必要がある。この移動速度の上昇に伴って混練時間（バインダーを添加してから排出するまでの時間）が短くなることから、混練時間を一定にするためにはバインダーの添加位置をより上流側に設定する必要がある。また、これとは反対に微粉炭の投入量を低減すると、上記とは逆の理由から、バインダーの添加位置をより下流側に設定する必要がある。   When the temperature of the pulverized coal is 100 ° C. or higher, even if the temperature of the pulverized coal is the same, it is necessary to adjust the addition position of the binder according to the increase or decrease of the input amount of the pulverized coal. That is, when the input amount of pulverized coal is increased, the pulverized coal level (or filling rate) in the kneader tends to be high and the stirring state tends to deteriorate. To prevent this, the pulverized coal level in the kneader is kept constant. It is necessary to increase the moving speed of the pulverized coal in the kneader so as to maintain it. As the moving speed increases, the kneading time (the time from when the binder is added to when it is discharged) becomes shorter. Therefore, in order to make the kneading time constant, it is necessary to set the addition position of the binder more upstream. There is. On the other hand, if the input amount of pulverized coal is reduced, it is necessary to set the addition position of the binder more downstream for the opposite reason.

そこで、本例では、バインダーの添加位置を以下のように、微粉炭の投入温度及び投入量に応じて３つの位置で調整できるようにしている。   Therefore, in this example, the addition position of the binder can be adjusted at three positions according to the input temperature and input amount of pulverized coal as follows.

次に、図１および図３を参照してバインダーの添加位置、つまりノズル５の位置調整方法について説明する。ここで、図３はノズル５の位置調整方法を説明するためのフローチャートである。なお、以下の説明において上流側から順に配置される添加領域I、添加位置II及び添加位置IIIは微粉炭の温度及び投入量に応じたノズル５によるバインダーの添加位置を示しており、具体的には、添加領域Iは微粉炭投入口４１ａから１７５０ｍｍ下流までの領域を示しており、添加位置IIは擬似造粒物排出口４１ｂから１７５０ｍｍ上流の位置を示しており、添加位置IIIは擬似造粒物排出口４１ｂから８７５ｍｍ上流の位置を示している。   Next, with reference to FIG. 1 and FIG. 3, a binder addition position, that is, a method for adjusting the position of the nozzle 5 will be described. Here, FIG. 3 is a flowchart for explaining a method for adjusting the position of the nozzle 5. In the following description, the addition region I, the addition position II, and the addition position III, which are sequentially arranged from the upstream side, indicate the addition position of the binder by the nozzle 5 according to the temperature and the input amount of pulverized coal. Indicates an area from the pulverized coal inlet 41a to 1750 mm downstream, an addition position II indicates a position 1750 mm upstream from the pseudo-granule discharge outlet 41b, and an addition position III indicates pseudo-granulation. A position 875 mm upstream from the object discharge port 41b is shown.

微粉炭の投入量が２０（ｔ／ｈ）（ステップＳ１０１）、かつ、投入温度が７０℃（ステップＳ１０２）である場合には、ノズル５を添加領域I内の固定位置に固定する。この固定位置は、添加領域I内であればどの位置でもよいが、好ましくは投入される微粉炭の投入量が増加するのに応じて、添加領域I内の上流側に設定する。   When the input amount of pulverized coal is 20 (t / h) (step S101) and the input temperature is 70 ° C. (step S102), the nozzle 5 is fixed at a fixed position in the addition region I. This fixed position may be any position within the addition region I, but is preferably set upstream in the addition region I as the amount of pulverized coal to be added increases.

微粉炭の投入量が２０（ｔ／ｈ）（ステップＳ１０１）、かつ、投入温度が１５０℃（ステップＳ１０３）である場合には、ノズル５を添加位置IIIに配置する。微粉炭の投入量が４０（ｔ／ｈ）（ステップＳ１０３）、かつ、投入温度が７０℃（ステップＳ１０４）である場合には、ノズル５を添加領域I内の該固定位置に固定する。微粉炭の投入量が４０（ｔ／ｈ）（ステップＳ１０３）、かつ、投入温度が１５０℃（ステップＳ１０５）である場合には、ノズル５を添加位置IIに固定する。   When the input amount of pulverized coal is 20 (t / h) (step S101) and the input temperature is 150 ° C. (step S103), the nozzle 5 is arranged at the addition position III. When the input amount of pulverized coal is 40 (t / h) (step S103) and the input temperature is 70 ° C. (step S104), the nozzle 5 is fixed at the fixing position in the addition region I. When the input amount of pulverized coal is 40 (t / h) (step S103) and the input temperature is 150 ° C. (step S105), the nozzle 5 is fixed at the addition position II.

このように微粉炭の投入量が同じで、かつ、微粉炭の投入温度が高い場合には、微粉炭の温度が低い場合よりも、微粉炭の投入位置を下流に配置している。これにより、擬似造粒物が混練機１の擬似造粒物排出口４１ｂに到達する前に、粒径６００〜５０００μｍの擬似粒子が３５重量％未満になったり、粒径７５μｍ以下の擬似粒子が１５重量％を超えたりするのを防止できるため、成型機７において確実に成型化することができる。   Thus, when the input amount of pulverized coal is the same and the input temperature of pulverized coal is high, the input position of pulverized coal is arranged downstream than when the temperature of pulverized coal is low. Thereby, before the pseudo granulated product reaches the pseudo granulated product discharge port 41b of the kneader 1, the pseudo particles having a particle size of 600 to 5000 μm are less than 35% by weight, or the pseudo particles having a particle size of 75 μm or less are formed. Since it can prevent exceeding 15 weight%, it can shape | mold reliably in the molding machine 7. FIG.

また、微粉炭の投入温度が１５０℃の場合において、微粉炭の投入量を２０（ｔ／ｈ）から４０（ｔ／ｈ）に変更する場合には、バインダーの添加位置を添加位置IIIよりも上流の添加位置IIに変更している。これにより、粒径６００〜５０００μｍの擬似粒子が３５重量％に増加する前に混練機１から排出されたり、粒径７５μｍ以下の擬似粒子が１５重量％以下に減少する前に混練機１から排出されるのを防止できる。   In addition, when the input temperature of pulverized coal is 150 ° C., when changing the input amount of pulverized coal from 20 (t / h) to 40 (t / h), the addition position of the binder is more than the addition position III. Changes to upstream addition position II. Thereby, the pseudo particles having a particle size of 600 to 5000 μm are discharged from the kneader 1 before increasing to 35% by weight, or the pseudo particles having a particle size of 75 μm or less are discharged from the kneader 1 before decreasing to 15% by weight or less. Can be prevented.

例えば、図４及び図５のような条件を例示できる。ここで、図４は、微粉炭の投入温度が１５０℃である場合の、混練時間と粒径が６００〜５０００μｍである擬似粒子の割合との関係を図示したグラフであり、図５は、微粉炭の投入温度が１５０℃である場合の、混練時間と粒径が７５μｍ以下の擬似粒子の割合との関係を図示したグラフである。   For example, the conditions as shown in FIGS. 4 and 5 can be exemplified. Here, FIG. 4 is a graph illustrating the relationship between the kneading time and the proportion of pseudo particles having a particle size of 600 to 5000 μm when the charging temperature of pulverized coal is 150 ° C., and FIG. It is the graph which illustrated the relationship between the kneading | mixing time and the ratio of the pseudo | simulation particle | grain with a particle size of 75 micrometers or less when the injection | throwing-in temperature of charcoal is 150 degreeC.

図４のグラフに示すように、粒径が６００〜５０００μｍの擬似粒子の割合が３５〜５０重量％の範囲内となる混練時間は矢印で示すＴ１（ｍｉｎ）であり、図５のグラフに示すように、粒径が７５μｍ以下の擬似粒子の割合が５〜１５重量％の範囲内となる混練時間は矢印で示すＴ２（ｍｉｎ）である。 As shown in the graph of FIG. 4, the kneading time when the ratio of the pseudo particles having a particle size of 600 to 5000 μm falls within the range of 35 to 50% by weight is T 1 (min) indicated by an arrow. As shown, the kneading time when the ratio of the pseudo particles having a particle size of 75 μm or less falls within the range of 5 to 15% by weight is T 2 (min) indicated by an arrow.

したがって、微粉炭の温度が１５０℃である場合には、混練時間が２分前後となるように、バインダーの添加位置を調整するとよい。   Therefore, when the temperature of the pulverized coal is 150 ° C., the addition position of the binder may be adjusted so that the kneading time is around 2 minutes.

なお、本例においては、各ノズル５にはバルブを介設したバインダー供給管を予め連接した構成としたが、これに限るものではなく、バインダー供給管をバインダー添加位置を変更する場合に、オペレーターが接続変更することも可能である。   In this example, each nozzle 5 has a configuration in which a binder supply pipe having a valve connected thereto is connected in advance. However, the present invention is not limited to this, and the operator is required to change the binder addition position of the binder supply pipe. It is also possible to change the connection.

なお、微粉炭の投入温度及び投入量は、上述の例に限定されるものではない。   In addition, the input temperature and input amount of pulverized coal are not limited to the above example.

成型炭の製造システムの概略図Schematic diagram of a coal production system 微粉炭が擬似粒子化する状態を図示した模式図Schematic diagram illustrating the state where pulverized coal becomes pseudo-particles バインダーの添加位置の調整方法を示したフローチャートFlow chart showing how to adjust the binder addition position 微粉炭の投入温度が１５０℃である場合の、混練時間と粒径が６００〜５０００μｍである擬似粒子の割合との関係を図示したグラフA graph illustrating the relationship between the kneading time and the proportion of pseudo particles having a particle size of 600 to 5000 μm when the charging temperature of pulverized coal is 150 ° C. 微粉炭の投入温度が１５０℃である場合の、混練時間と粒径が７５μｍ以下の擬似粒子の割合との関係を図示したグラフA graph illustrating the relationship between the kneading time and the proportion of pseudo particles having a particle size of 75 μm or less when the pulverized coal charging temperature is 150 ° C.

符号の説明Explanation of symbols

１混練機
３ホッパー装置
４シュート
５ノズル
７成型機
４１混練機本体
４２パドル
４２ａ回転軸
４２ｂ混練翼 1 kneading machine 3 hopper device 4 chute 5 nozzle 7 molding machine 41 kneading machine body 42 paddle
42a rotating shaft
42b kneading blade

Claims (4)

混練機内において混練されながら一方向に搬送される微粉炭に対してバインダーを供給することにより、コークス炉装入用の擬似造粒物を製造する擬似造粒物の製造方法であって、
前記混練機に投入される前記微粉炭の投入温度及び／又は微粉炭の投入量に応じて、前記バインダーの供給位置を、前記混練機による前記微粉炭の搬送方向において調整することを特徴とする擬似造粒物の製造方法。 By supplying a binder to pulverized coal that is conveyed in one direction while being kneaded in a kneader, a method for producing a pseudo-granulated product for producing a pseudo-granulated product for charging a coke oven,
The supply position of the binder is adjusted in the conveying direction of the pulverized coal by the kneader according to the input temperature of the pulverized coal input to the kneader and / or the input amount of pulverized coal. A method for producing a pseudo-granulated product. 前記混練機内への微粉炭投入温度が１００℃以上の場合において、
該微粉炭の投入温度が上昇するのに応じて、前記バインダーの供給位置を、前記微粉炭の搬送方向下流側に設定することを特徴とする請求項１に記載の擬似造粒物の製造方法。 In the case where the pulverized coal charging temperature into the kneader is 100 ° C. or higher,
The method for producing a pseudo-granulated product according to claim 1, wherein the supply position of the binder is set on the downstream side in the conveying direction of the pulverized coal in accordance with an increase in the charging temperature of the pulverized coal. . 前記混練機内への微粉炭投入温度が１００℃以上の場合において、
該混練機内への微粉炭投入量が低下するのに応じて、前記バインダーの供給位置を、前記微粉炭の搬送方向下流側に設定することを特徴とする請求項１に記載の擬似造粒物の製造方法。 In the case where the pulverized coal charging temperature into the kneader is 100 ° C. or higher,
2. The pseudo-granulated product according to claim 1, wherein a supply position of the binder is set on the downstream side in the conveying direction of the pulverized coal in accordance with a decrease in the amount of pulverized coal charged into the kneader. Manufacturing method. 前記混練機による混練後の前記擬似造粒物の粒度分布は、６００〜５０００μｍの粒が３５〜５０重量％、７５μｍ以下の粒が５〜１５重量％であることを特徴とする請求項１乃至３のうちいずれか一つに記載の擬似造粒物の製造方法。   The particle size distribution of the pseudo granulated product after kneading by the kneader is 35 to 50% by weight of particles having a particle size of 600 to 5000 μm and 5 to 15% by weight of particles having a particle size of 75 μm or less. 3. The method for producing a pseudo-granulated product according to any one of 3 above.
JP2006127730A 2006-05-01 2006-05-01 Method for producing pseudo-granulated product Expired - Fee Related JP4837436B2 (en)

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