JP2007063420A - Bulk density-improving agent of coking coal for coke making, method for improving bulk density and method for producing coke - Google Patents
Bulk density-improving agent of coking coal for coke making, method for improving bulk density and method for producing coke Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B57/00—Other carbonising or coking processes; Features of destructive distillation processes in general
- C10B57/04—Other carbonising or coking processes; Features of destructive distillation processes in general using charges of special composition
- C10B57/06—Other carbonising or coking processes; Features of destructive distillation processes in general using charges of special composition containing additives
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B57/00—Other carbonising or coking processes; Features of destructive distillation processes in general
- C10B57/08—Non-mechanical pretreatment of the charge, e.g. desulfurization
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Abstract
Description
本発明は、コークス製造用原料炭の嵩密度向上のための技術に関する。より詳しくは、所定の粘度に調整された薬剤をコークス製造用原料炭に添加することによってコークス製造用原料炭の嵩密度を向上させる技術に関する。 The present invention relates to a technique for improving the bulk density of raw coal for producing coke. More specifically, the present invention relates to a technique for improving the bulk density of coke production raw coal by adding a chemical adjusted to a predetermined viscosity to coke production raw coal.
コークス（coke）は、石炭を高温炉（以下、コークス炉、coke furnace）に装入して乾留することによって得られる多孔質炭質物であり、製鉄や鋳物製造の熱源、あるいは燃料などに利用されている。 Coke is a porous carbonaceous material obtained by charging coal into a high temperature furnace (hereinafter referred to as a coke furnace) and dry distillation, and is used as a heat source or fuel for iron and casting production. ing.
このコークスのコストは、製鉄等のコストの主要部分を占めるため、現在、コークス製造における生産性を向上させることによって、コークスコストの低減のための改善努力が行われている。 Since the cost of coke occupies a major part of the cost of iron making, etc., improvement efforts are currently being made to reduce coke cost by improving productivity in coke production.
例えば、原料である石炭（以下、原料炭）に何らかの前処理を施して該原料炭の嵩密度を向上させることにより、コークス炉への原料炭の装入量を増加させて生産性向上を図る試みがなされている。 For example, the raw coal (hereinafter referred to as raw coal) is subjected to some pretreatment to improve the bulk density of the raw coal, thereby increasing the amount of raw coal charged into the coke oven and improving productivity. Attempts have been made.
原料炭の前記嵩密度向上技術の代表的なものとして、原料炭にオイル皮膜を形成して原料炭粒子間の摩擦を減少させる技術（オイリング方式）、コークス炉装入前に予め原料炭を分級して粒度を調製する技術（特許文献１参照）、原料炭粒子表面に付着した水の表面張力を低下させて原料炭粒子間の潤滑性を付与するために、該原料炭にジアルキルスルホコハク酸などの界面活性剤を添加する技術などが知られている（例えば、特許文献２参照）。
嵩密度向上を目的とする薬剤を原料炭に添加する技術では、当該薬剤と原料炭を均一に混合しなければ、所望の嵩密度向上の効果は充分に発揮されない。このため、原料炭と薬剤を均一混合するための混合装置（ミキサー）が採用される場合がある。しかし、この混合装置はコークス製造に係わる設備コストを押し上げるとともに、均一混合のための所要時間は、生産性低下の要因となっていた。 In the technique of adding a chemical aimed at improving the bulk density to the raw coal, the desired effect of improving the bulk density is not sufficiently exhibited unless the chemical and raw coal are mixed uniformly. For this reason, a mixing device (mixer) for uniformly mixing raw coal and chemicals may be employed. However, this mixing apparatus increases the cost of equipment related to coke production, and the time required for uniform mixing has been a factor in reducing productivity.
また、コークス製造設備では、雨にさらされて水分が増加した原料炭の使用を想定し、当該原料炭の水分を蒸発させることによって嵩密度を向上させる目的の装置が付設される場合が多い。しかし、原料炭からの水分の除去を行ってしまうと、特に老朽化したコークス炉では原料炭の押し詰まりが発生し、この結果、逆にコークス生産性を悪化してしまうという問題があった。 In addition, in coke production facilities, there are many cases where an apparatus for increasing the bulk density is attached by evaporating the moisture of the raw coal, assuming the use of raw coal exposed to rain and having increased moisture. However, if moisture is removed from the raw coal, the coke oven is clogged, particularly in an aging coke oven, resulting in a problem that the coke productivity deteriorates.
そこで、本発明は、混合装置を用いなくても原料炭と薬剤（嵩密度向上剤）の均一混合を実現でき、さらには、水分が増加した原料炭を当該水分の除去処理を行うことなく、該原料炭の嵩密度を向上させることができる技術を提供することを主な目的とする。 Therefore, the present invention can achieve uniform mixing of raw coal and chemicals (bulk density improver) without using a mixing device, and further, without removing the moisture from the raw coal with increased moisture, The main object is to provide a technique capable of improving the bulk density of the raw coal.
本発明は、まず、粘度１０〜４５ｍＰａ・ｓに調整されたことを特徴とするコークス製造用原料炭の嵩密度向上剤を提供する。この嵩密度向上剤は、粘度が前記範囲内であることが重要であって、その具体的な薬剤材料は特に限定されないが、例えば、ジアルキルスルホコハク酸又はその塩、若しくはポリオキシエチレン系付加重合物又はその塩を少なくとも含むような界面活性作用を有する薬剤を採用することが可能である。なお、本発明において「粘度」とは、ＪＩＳ Ｋ−７１１７−１に規定された方法によって定まる値であり、測定温度は２５℃とする。 The present invention first provides a bulk density improver for coking coal, characterized in that the viscosity is adjusted to 10 to 45 mPa · s. It is important that the bulk density improver has a viscosity within the above range, and the specific drug material is not particularly limited. For example, dialkylsulfosuccinic acid or a salt thereof, or polyoxyethylene-based addition polymer Or it is possible to employ | adopt the chemical | medical agent which has a surface active effect | action which contains the salt at least. In the present invention, “viscosity” is a value determined by the method defined in JIS K-7117-1, and the measurement temperature is 25 ° C.
次に、本発明は、粘度１０〜４５ｍＰａ・ｓに調整された薬剤をコークス製造用原料炭に添加することを特徴とするコークス製造用原料炭の嵩密度向上方法を提供する。薬剤のコークス製造用原料炭に添加する方法は、特に限定されないが、原料炭により均一に薬剤が混合できる噴霧などの方法が好ましい。 Next, this invention provides the bulk density improvement method of the raw coal for coke manufacture characterized by adding the chemical | medical agent adjusted to the viscosity of 10-45 mPa * s to the raw coal for coke manufacture. The method of adding the chemical to the coking coal for producing coke is not particularly limited, but a method such as spraying that can uniformly mix the chemical with the raw coal is preferable.
さらに、本発明は、コークス炉へ装入される原料炭の嵩密度を向上させる前処理工程を行った後に、前記原料炭をコークス炉へ装入するコークス製造方法において、前記前処理工程で、粘度１０〜４５ｍＰａ・ｓに調整された嵩密度向上剤を前記原料炭に添加するように工夫したコークス製造方法を提供する。特に、薬剤（嵩密度向上剤）と原料炭の混合装置を用いないコークス製造方法や混合時間を短縮できるコークス製造方法を提供する。 Furthermore, the present invention provides a coke manufacturing method in which the raw coal is charged into a coke oven after performing a pretreatment step to improve the bulk density of the raw coal charged into the coke oven, in the pretreatment step, Provided is a coke production method devised so that a bulk density improver adjusted to a viscosity of 10 to 45 mPa · s is added to the raw coal. In particular, a coke production method that does not use a chemical (bulk density improver) and raw coal mixing apparatus and a coke production method that can shorten the mixing time are provided.
本発明では、粘度１０〜４５ｍＰａ・ｓに調整された嵩密度向上剤を用いることによって、混合装置を特別用いなくても原料炭と薬剤（嵩密度向上剤）の均一混合を達成することができる。また、前記嵩密度向上剤を用いることによって、水分が増加した原料炭であっても、当該水分の除去処理を予め行うことなく、該原料炭の嵩密度を向上させることができる。なお、水分の除去処理を行った場合では、残留水分が存在しても、原料炭の嵩密度を一層向上させることができる。 In the present invention, by using a bulk density improver adjusted to a viscosity of 10 to 45 mPa · s, it is possible to achieve uniform mixing of raw coal and a chemical (bulk density improver) without special use of a mixing device. . Further, by using the bulk density improver, even if the raw coal has increased moisture, the bulk density of the raw coal can be improved without performing the moisture removal process in advance. In addition, when the moisture removal process is performed, the bulk density of the raw coal can be further improved even if residual moisture is present.
以下、本発明の好適な実施形態について説明する。なお、以下に説明する実施形態は、本発明に係る好適例を示すものであって、これらの例示された実施形態により、本発明が狭く限定されることはない。 Hereinafter, preferred embodiments of the present invention will be described. In addition, embodiment described below shows the suitable example which concerns on this invention, and this invention is not limited narrowly by these illustrated embodiment.
図１は、本発明に係わる典型的なコークス製造の主要工程のフロー図である。 FIG. 1 is a flow diagram of the main steps of typical coke production according to the present invention.
コークス製造に用いられる原料炭は、輸入陸揚げされた後に、野外の所定場所に貯留される（図１中の「貯炭」参照）。原料炭は、この貯炭場からコークス製造現場へ搬送され、前処理工程にかけられる。この前処理工程では、原料炭の大きさを揃えるための粉砕が行われた後、ベルトコンベアなどの搬送装置を介してコークス炉へ導入され、乾留が行われる。乾留処理された原料炭は消火処理が施された後にコークス製品として出荷される。出荷先は、製鉄現場や鋳物製造現場などが代表的である。なお、乾留過程で発生する乾留ガス（図示せず。）は、所定の脱硫装置に送り込まれて処理され、それに続いて脱アンモニア処理などが行われる。 Coking coal used for coke production is imported and landed and then stored in a predetermined place in the field (see “Coal storage” in FIG. 1). Coking coal is transported from this coal storage site to the coke production site and subjected to a pretreatment process. In this pretreatment step, after crushing to make the raw coal sizes uniform, the raw coal is introduced into a coke oven via a conveyor such as a belt conveyor, and dry distillation is performed. Coking coal that has been carbonized is subjected to fire extinguishing treatment and then shipped as a coke product. The shipping destination is typically an iron manufacturing site or a casting manufacturing site. Note that dry distillation gas (not shown) generated in the dry distillation process is sent to a predetermined desulfurization apparatus and processed, followed by deammonia treatment and the like.
ここで、本発明では、上記前処理工程において、粉砕処理が行われる前の原料炭に対して、所定粘度に調整された薬剤を添加する。この前処理工程における薬剤添加の目的は、原料炭の嵩密度を向上させて後続のコークス炉への原料炭の装入量を増加させることにより、コークスの生産性を向上させることである。 Here, in this invention, the chemical | medical agent adjusted to the predetermined viscosity is added with respect to the raw coal before a grinding | pulverization process in the said pre-processing process. The purpose of the chemical addition in this pretreatment step is to improve the coke productivity by increasing the bulk density of the raw coal and increasing the amount of raw coal charged into the subsequent coke oven.
薬剤の好適な粘度は、１０〜４５ｍＰａ・ｓである。粘度が１０ｍＰａ・ｓ未満では、嵩密度の向上が充分になされず、粘度が４５ｍＰａ・ｓを超えると、原料炭の流動性が低下しコークス炉での押し詰まりなどが発生し易くなり、生産性低下の要因をつくってしまう可能性が生じる。 The preferred viscosity of the drug is 10 to 45 mPa · s. When the viscosity is less than 10 mPa · s, the bulk density is not sufficiently improved. When the viscosity exceeds 45 mPa · s, the flowability of the raw coal is reduced, and clogging in the coke oven is likely to occur. The possibility of creating a factor of decline arises.
使用する薬剤が界面活性剤である場合は、当該薬剤は、原料炭粒子表面に付着した水の表面張力を低下させて原料炭粒子間の潤滑性を付与することによって、原料炭の嵩密度を向上させるという作用を発揮する。 When the chemical used is a surfactant, the chemical reduces the surface tension of the water adhering to the surface of the raw coal particles and imparts lubricity between the raw coal particles, thereby increasing the bulk density of the raw coal. Demonstrate the effect of improving.
より詳しくは、原料炭粒子の表面に付着している水分は当該粒子同士の接近を阻害するため、原料炭の水分が高いほど、コークス炉に装入される原料炭の嵩密度が低下する傾向にあるが、界面活性機能を有する薬剤は、原料炭粒子表面の水分の反発力を緩和し、原料炭粒子同士を接近し易くするという作用を発揮する。 More specifically, the moisture adhering to the surface of the raw coal particles hinders the proximity of the particles, so the higher the raw coal moisture, the lower the bulk density of the raw coal charged into the coke oven. However, the chemical | medical agent which has surface active function exhibits the effect | action of relieving the repulsive force of the water | moisture content on the raw coal particle surface, and making raw coal particles easy to approach.
さらに、本発明に係る薬剤（嵩密度向上剤）は、粘度１０〜４５ｍＰａ・ｓに調整してあるので、原料炭に対する混合分散性に優れる。このため、上記作用を原料炭全体に均一に発揮させることができる。本発明においては、薬剤と原料炭の混合装置（ミキサー）は特に設ける必要がなく、また混合装置を用いるとしても混合時間を大幅に短縮できる。 Furthermore, since the chemical | medical agent (bulk density improvement agent) which concerns on this invention is adjusted to the viscosity of 10-45 mPa * s, it is excellent in the mixing dispersibility with respect to raw material charcoal. For this reason, the said effect | action can be exhibited uniformly to the whole raw coal. In the present invention, it is not necessary to provide a mixing device (mixer) for the chemical and raw coal, and even if a mixing device is used, the mixing time can be greatly shortened.
本発明で採用可能な薬剤の一部を例示すると、まず、アニオン界面活性剤を挙げることができる。特に粒径が１ｍｍ以上の比較的大きなサイズの原料炭粒子の嵩密度の向上には、アニオン界面活性剤であるジアルキルスルホコハク酸やその塩が有効である。ジアルキルスルホコハク酸塩は、例えば、ナトリウム塩、アンモニウム塩、カリウム塩、トリエタノールアミン塩などを例示できるが、特にナトリウム塩やトリエタノールアミン塩が有効である。ジアルキルスルホコハク酸のアルキル基の炭素数は８〜１６が好適である。 Examples of some of the drugs that can be used in the present invention include an anionic surfactant. In particular, dialkylsulfosuccinic acid or a salt thereof, which is an anionic surfactant, is effective for improving the bulk density of raw coal particles having a relatively large particle size of 1 mm or more. Examples of the dialkylsulfosuccinate include sodium salt, ammonium salt, potassium salt, triethanolamine salt and the like, and sodium salt and triethanolamine salt are particularly effective. As for carbon number of the alkyl group of dialkyl sulfosuccinic acid, 8-16 are suitable.
また、原料炭の嵩密度を向上させる薬剤として、非イオン界面活性剤を採用してもよい。特に粒径が１ｍｍ未満の比較的細かなサイズの原料炭粒子の嵩密度の向上には、非イオン界面活性剤が好適であり、その中でもポリオキシエチレン（ＰＯＥ）付加重合物が特に好適である。例えば、付加モル数が２〜５であって、そのナトリウム塩、アンモニウム塩、カリウム塩などの塩を採用することができる。ポリオキシエチレンアルキルエーテル（一般構造式：Ｒ-Ｏ-（ＣＨ２ＣＨ２Ｏ）ｎ-Ｈ）を採用する場合、構成アルキル基部分の原料として、例えば、ドバノール、ダイヤドール等の合成アルコール、セタノール、炭素数１２〜１８の脂肪族アルコールを使用したものなどを挙げることができる。なお、ジアルキルスルホコハク酸やその塩とポリオキシエチレン（ＰＯＥ）付加重合物やその塩とを、目的に応じて好適な割合で配合して用いるのは自由である。いずれにしても本発明では、薬剤の粘度が１０〜４５ｍＰａ・ｓの範囲内に収めることが重要である。 Moreover, you may employ | adopt a nonionic surfactant as a chemical | medical agent which improves the bulk density of raw material charcoal. In particular, nonionic surfactants are suitable for improving the bulk density of relatively fine raw material carbon particles having a particle size of less than 1 mm, and among these, polyoxyethylene (POE) addition polymers are particularly preferred. . For example, the added mole number is 2 to 5, and a salt such as a sodium salt, an ammonium salt, or a potassium salt can be employed. When polyoxyethylene alkyl ether (general structural formula: R—O— (CH 2 CH 2 O) n—H) is employed, as a raw material of the constituent alkyl group portion, for example, synthetic alcohols such as dovanol and diadol, cetanol And those using an aliphatic alcohol having 12 to 18 carbon atoms. It should be noted that the dialkylsulfosuccinic acid or its salt and the polyoxyethylene (POE) addition polymer or its salt can be freely mixed and used in a suitable ratio depending on the purpose. In any case, in the present invention, it is important that the viscosity of the medicine falls within the range of 10 to 45 mPa · s.
薬剤の添加量は、原料炭の性状に応じて適宜選択すればよいが、例えば、原料炭重量（ドライ）に対して、０．０１〜０．１重量％になるように添加することが望ましい。０．０１重量％未満では、添加量が少なすぎて原料炭と均一に接触することが困難となり、部分的に嵩密度の向上が達成できない場合が発生する可能性がある。一方、０．１重量％を超えると、嵩密度向上の効果の増大傾向が頭打ちとなり、過剰量添加によるコストデメリットの方が問題となる。 The addition amount of the drug may be appropriately selected according to the properties of the raw coal, but for example, it is desirable to add 0.01 to 0.1% by weight with respect to the raw coal weight (dry). . If it is less than 0.01% by weight, it is difficult to uniformly contact the raw coal because the amount added is too small, and there is a possibility that the improvement of the bulk density cannot be partially achieved. On the other hand, when it exceeds 0.1% by weight, the increasing tendency of the effect of improving the bulk density reaches its peak, and the cost demerit due to the excessive addition becomes more problematic.
薬剤添加の方法は、特に限定されないが、原料炭に薬剤が均一に分散混合される方法が好ましく、例えば、ベルトコンベア上に積載搬送される原料炭に向けて薬剤を噴霧する方法を好適に採用することができる。 The method of adding the chemical is not particularly limited, but a method in which the chemical is uniformly dispersed and mixed with the raw coal is preferable. For example, a method in which the chemical is sprayed toward the raw coal loaded and conveyed on the belt conveyor is suitably employed. can do.
本発明に係る粘度１０〜４５ｍＰａ・ｓの薬剤（嵩密度向上剤）は、特に、混合装置（攪拌装置）を用いなくても、前記噴霧方法によって、原料炭表面に広く分散して、原料炭全体に均一に混合する。また、同薬剤によれば、速やかに原料炭に均一に混合するので、従来の混合装置を用いた工程における攪拌調整のための時間を大幅に短縮又は削減することができるため、この観点でも生産性向上に寄与する。 The chemical (bulk density improver) having a viscosity of 10 to 45 mPa · s according to the present invention is widely dispersed on the surface of the raw coal by the spraying method without using a mixing device (stirring device). Mix evenly throughout. In addition, according to the same agent, since it is quickly and uniformly mixed with the raw coal, the time for adjusting the stirring in the process using the conventional mixing apparatus can be greatly shortened or reduced, so that production can be performed from this viewpoint. Contributes to improved performance.
以下、実施例に基づいて本発明をさらに詳細に説明するが、本発明はこれらの実施例によりなんら制限されるものではない。 EXAMPLES Hereinafter, although this invention is demonstrated further in detail based on an Example, this invention is not restrict | limited at all by these Examples.
（実施例１）。
試験方法：予め３ｍｍ以下の粒径分布が７０％になるように粉砕・調整した試験炭（オーストラリア炭・サラジ、水分９．１％）１０ｋｇを平坦な地面に幅６０ｃｍで厚さ約１０ｃｍに整えて静置した。なお、この静置方法は、ベルトコンベアによる原料炭搬送を想定したものである。
(Example 1).
Test method: 10 kg of test charcoal (Australian charcoal / Saraji, moisture 9.1%) pulverized and adjusted in advance so that the particle size distribution of 3 mm or less is 70% is arranged on a flat ground to a width of 60 cm and a thickness of about 10 cm And left to stand. In addition, this stationary method assumes raw material charcoal conveyance by a belt conveyor.
次に、静置されている試験炭上に向けて、粘度が異なる各種薬剤液（嵩密度向上剤、表１参照）を扇形に広がるように噴霧可能な小流量タイプのノズルを介して、所定量噴霧を行い、続いて、モルタルミキサーによって所定時間攪拌した。 Next, a variety of chemical solutions having different viscosities (bulk density improvers, see Table 1) are sprayed on the test charcoal that is allowed to stand in a fan-shaped manner through a small flow rate type nozzle. A constant amount of spraying was performed, followed by stirring for a predetermined time with a mortar mixer.
続いて、容量１０Ｌ容器中に高さ５０ｃｍから試験炭を落下させ、その容器に入った試験炭の重量を測定することにより嵩密度を計算した。この結果を、次の「表１」に示す。なお、表１中の「嵩密度向上率」は、次の計算数式１に基づいて求めた。 Subsequently, the bulk density was calculated by dropping the test charcoal from a height of 50 cm into a 10 L container and measuring the weight of the test charcoal contained in the container. The results are shown in “Table 1” below. The “bulk density improvement rate” in Table 1 was determined based on the following calculation formula 1.
前掲する「表１」に示された結果から、ジオクチルスルホコハク酸ナトリウムやＰＯＥオレイルエーテル及びその硫酸塩を薬剤（嵩密度向上剤）として用いた場合において、粘度を１０、２８、３０、３３、４３ｍＰａ・ｓにした試験区では、嵩密度向上率が高かった。 From the results shown in the above-mentioned “Table 1”, when dioctyl sulfosuccinate sodium, POE oleyl ether and sulfate thereof are used as a drug (bulk density improver), the viscosity is 10, 28, 30, 33, 43 mPa・ In the test section designated s, the bulk density improvement rate was high.
特に、ミキサー混合を１分しか行わなくても有効に嵩密度向上を達成することができた（試験区２〜４、７、８、１２、１３参照）。また、試験区２と１６、試験区３と１７、試験区４と１８、試験区８と２２、試験区１２と２４、試験区１３と２５の各嵩密度向上率データを比較するとわかるように、粘度１０〜４５ｍＰａ・ｓの範囲に調整されたジオクチルスルホコハク酸ナトリウム、ＰＯＥオレイルエーテル硫酸塩、ＰＯＥオレイルエーテルなどの薬剤を用いると、ミキサー混合の時間が１分程度でも、混合時間１５分の場合とほぼ同等かそれ以上の嵩密度向上が達成されている。 In particular, it was possible to effectively improve the bulk density even when mixing with the mixer for only 1 minute (see test sections 2 to 4, 7, 8, 12, and 13). Moreover, as can be seen by comparing the respective bulk density improvement rate data of the test groups 2 and 16, test groups 3 and 17, test groups 4 and 18, test groups 8 and 22, test groups 12 and 24, and test groups 13 and 25. When a chemical such as sodium dioctyl sulfosuccinate, POE oleyl ether sulfate, POE oleyl ether, etc., adjusted to a viscosity of 10 to 45 mPa · s is used, even if the mixing time is about 1 minute, the mixing time is 15 minutes. An improvement in bulk density that is almost the same as or higher than the above is achieved.
従って、本発明に係る嵩密度向上剤は、試験炭のように水分の多い原料炭であっても高い嵩密度向上率を得ることができ、さらには、ミキサー混合が短時間であっても、原料炭の嵩密度を充分に向上させることができることがわかった。 Therefore, the bulk density improver according to the present invention can obtain a high bulk density improvement rate even if it is a raw coal with a lot of water like test charcoal. It was found that the bulk density of the raw coal can be sufficiently improved.
（実施例２）。
実施例１と同じ試験炭（原料炭）を用いて、該試験炭を幅３０ｃｍ、長さ１０ｍのベルトコンベアに載せた直後に、霧吹き器を介して、粘度１０、３０、５２ｍＰａ・ｓに調整された各ジオクチルスルホコハク酸ナトリウムを噴霧した。ベルトコンベアの進行方向末端に到着した試験炭は、容量１０Ｌ容器中に高さ５０ｃｍから落下させ、その容器に入った試験炭の重量を測定することにより嵩密度及び嵩密度向上率を計算した。その結果を次の「表２」に示す。
(Example 2).
Using the same test charcoal (raw coal) as in Example 1, immediately after placing the test charcoal on a belt conveyor having a width of 30 cm and a length of 10 m, the viscosity is adjusted to 10, 30, and 52 mPa · s via a spray bottle. Each of the prepared dioctyl sodium sulfosuccinates was sprayed. The test charcoal arriving at the end of the belt conveyor in the traveling direction was dropped from a height of 50 cm into a 10 L container, and the bulk density and the bulk density improvement rate were calculated by measuring the weight of the test charcoal contained in the container. The results are shown in the following “Table 2”.
前掲した「表２」に示された結果からわかるように、ベルトコンベアに積載された試験炭（原料炭）に対して、粘度１０ｍＰａ・ｓや３０ｍＰａ・ｓのジオクチルスルホコハク酸ナトリウム（実施例）を噴霧しただけで、即ちミキサー混合を行わなくても、原料炭の嵩密度を有効に向上できることがわかった（「表２」参照）。 As can be seen from the results shown in the above-mentioned “Table 2”, sodium dioctylsulfosuccinate (Example) having a viscosity of 10 mPa · s or 30 mPa · s was applied to the test coal (coking coal) loaded on the belt conveyor. It was found that the bulk density of the raw coal can be effectively improved only by spraying, that is, without mixing with a mixer (see “Table 2”).
一方、粘度５２ｍＰａ・ｓのジオクチルスルホコハク酸ナトリウム（比較例）では、同様の噴霧方法であっても、嵩密度向上率は粘度１０ｍＰａ・ｓや３０ｍＰａ・ｓのジオクチルスルホコハク酸ナトリウムに及ばなかった（「表２」参照）。 On the other hand, in the case of sodium dioctylsulfosuccinate having a viscosity of 52 mPa · s (comparative example), the bulk density improvement rate did not reach that of sodium dioctylsulfosuccinate having a viscosity of 10 mPa · s or 30 mPa · s even with the same spraying method (“ See Table 2).
本実施例２係る試験結果から、粘度が所定範囲に調整された発明に係る薬剤（嵩密度向上剤）を用いると、コークス製造において、コークス炉に対して原料炭を装入するためのベルトコンベア上に当該薬剤を噴霧するだけの簡易な方法で、原料炭の嵩密度を向上できる。この結果、コークス炉への原料炭の装入量を高めることができるので、コークス生産効率を向上できる。 From the test results according to the second embodiment, when a chemical (bulk density improver) according to the invention whose viscosity is adjusted to a predetermined range is used, a belt conveyor for charging raw coke into a coke oven in coke production. The bulk density of the raw coal can be improved by a simple method of spraying the drug on top. As a result, since the charging amount of the raw coal into the coke oven can be increased, the coke production efficiency can be improved.
本発明は、コークス製造用原料炭の嵩密度向上のための技術、ひいてはコークス製造における生産効率向上技術として利用できる。 INDUSTRIAL APPLICABILITY The present invention can be used as a technique for improving the bulk density of raw coal for coke production, and thus as a technique for improving production efficiency in coke production.
Claims (4)
前記前処理工程では、粘度１０〜４５ｍＰａ・ｓに調整された嵩密度向上剤を前記コークス製造用原料炭に添加することを特徴とするコークス製造方法。 In the coke manufacturing method of charging the coking coal into the coke oven, after performing a pretreatment step to improve the bulk density of the raw coal charged to the coke oven,
In the pretreatment step, a bulk density improver adjusted to a viscosity of 10 to 45 mPa · s is added to the raw coal for producing coke.
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| JP2005251708A JP2007063420A (en) | 2005-08-31 | 2005-08-31 | Bulk density-improving agent of coking coal for coke making, method for improving bulk density and method for producing coke |
| CNA2006100817959A CN1923955A (en) | 2005-08-31 | 2006-05-11 | Volume density improving agent of raw material coal for coking, volume density improving method and coal-coking process |
| KR1020060043802A KR20070025945A (en) | 2005-08-31 | 2006-05-16 | A bulk density improving agent of raw charcoals for manufacturing cokes, a bulk density improving method of raw charcoals for manufacturing cokes, and a method of manufacturing cokes |
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| US11395989B2 (en) | 2018-12-31 | 2022-07-26 | Suncoke Technology And Development Llc | Methods and systems for providing corrosion resistant surfaces in contaminant treatment systems |
| US11767482B2 (en) | 2020-05-03 | 2023-09-26 | Suncoke Technology And Development Llc | High-quality coke products |
| US11851724B2 (en) | 2021-11-04 | 2023-12-26 | Suncoke Technology And Development Llc. | Foundry coke products, and associated systems, devices, and methods |
| US11946108B2 (en) | 2021-11-04 | 2024-04-02 | Suncoke Technology And Development Llc | Foundry coke products and associated processing methods via cupolas |
| US12110458B2 (en) | 2022-11-04 | 2024-10-08 | Suncoke Technology And Development Llc | Coal blends, foundry coke products, and associated systems, devices, and methods |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1923955A (en) | 2007-03-07 |
| KR20070025945A (en) | 2007-03-08 |
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