JPS6125651A - Floating and recovering method of pulverized coal - Google Patents
Floating and recovering method of pulverized coalInfo
- Publication number
- JPS6125651A JPS6125651A JP59146741A JP14674184A JPS6125651A JP S6125651 A JPS6125651 A JP S6125651A JP 59146741 A JP59146741 A JP 59146741A JP 14674184 A JP14674184 A JP 14674184A JP S6125651 A JPS6125651 A JP S6125651A
- Authority
- JP
- Japan
- Prior art keywords
- coal
- oil
- spread
- binder
- pulverized coal
- 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
【発明の詳細な説明】
〔発明の技術分野〕
本発明は粉砕炭の浮選回収方法に関し、より詳細にはバ
インダーの展着によって形成された油展着炭を浮選によ
り回収する方法に関する。DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a method for flotation recovery of pulverized coal, and more particularly to a method for recovering oil-spread coal formed by spreading a binder by flotation.
従来、浮選法による石炭の選炭技術は、高石炭化度瀝青
炭からの製鉄用原料炭の選炭方法として、商業的に完成
されていた。Conventionally, coal cleaning technology using the flotation method has been commercially completed as a method for preparing coking coal for steel manufacturing from high-grade bituminous coal.
しかしながら、石炭化度がより低い亜ｄ青炭、褐炭、亜
炭等を含む所謂一般炭では、石炭化度の低下に伴って親
水性が増大するので、浮選法による回収効率が低く、ま
た、フロスの灰分抱き込みも多く、技術的には完成され
ていない。However, so-called thermal coal, which includes subdescent blue coal, brown coal, lignite, etc., which have a lower degree of coalification, has a lower hydrophilicity as the degree of coalification decreases, so the recovery efficiency by flotation method is low. There is a lot of ash content in the floss, and it is not technically perfect.
すなわち、一般炭の浮選法による選炭技術は短期的のも
の、または研究途上のものは多々あるが、経済的に完成
された技術はいまだ存在しなかった。In other words, although there are many coal cleaning technologies using the flotation method for thermal coal that are short-term or still under research, no economically perfected technology has yet existed.
一方、一般炭の微粉に対する選炭技術としては、所謂Ｏ
Ａ法（油凝集法）が知られている。On the other hand, the so-called O
Method A (oil flocculation method) is known.
しかしながら、このＯＡ法は炭質による差違はあるが、
純炭量に対して多量の炭化水素油をバインダーとして使
用して微粉炭を凝集、造粒する方法であり、スラリー母
液との分離性や粘土分の除去性は良好であるが、高値な
炭化水素油を多量に使用するので、゛その時の油価格に
もよるが、現時点では経済性に乏しい。However, although there are differences in this OA method depending on the carbon quality,
This is a method of agglomerating and granulating pulverized coal using a large amount of hydrocarbon oil as a binder relative to the amount of pure coal. Although it has good separation from slurry mother liquor and clay content removal, it is expensive to carbonize. Since it uses a large amount of hydrogen oil, it is currently not economical, although it depends on the oil price at the time.
また、もしもＯＡ法において、バインダー量を削減して
経済性を追及すると、粉砕炭がらの造粒性が低下し、Ｏ
Ａ法において通常採用されているスクリーン、筋型脱水
機等では分離が困難となったり、経済性を有する回収率
が得られなかった。In addition, if in the OA method, the amount of binder is reduced to pursue economic efficiency, the granulation properties of the crushed coal particles will decrease, and the O
Using screens, striped dehydrators, etc. that are commonly used in Method A, separation becomes difficult and economical recovery rates cannot be obtained.
本発明は、上記従来の問題点を解決すべくなされたもの
であり、粉砕炭への展着にバインダーとして使用される
炭化水素油の使用量を削減すると共に、スラリー母液か
ら浮選法によって油展着炭を回収して油展着炭製造、回
収の経済性を高めることを目的とするものである。The present invention has been made to solve the above-mentioned conventional problems, and it reduces the amount of hydrocarbon oil used as a binder for spreading on pulverized coal, and also reduces the amount of hydrocarbon oil used as a binder for spreading onto pulverized coal. The purpose of this project is to collect spread coal and improve the economic efficiency of oil spread coal production and recovery.
上記目的を達成する本発明は、バインダーが添加された
粉砕炭の水スラリーを攪拌し、該粉砕炭の粒子に前記バ
インダーを展着させて該粉砕炭の油展着炭の水スラリー
を製造し、この水スラリーに起泡剤または該起泡剤を主
成分とする浮選剤を添加して前記油展着炭を浮上せしめ
、この浮上した油展着炭を回収することによって達成さ
れる。The present invention achieves the above object by stirring a water slurry of pulverized coal to which a binder has been added, and spreading the binder on particles of the pulverized charcoal to produce a water slurry of oil-spread charcoal of the pulverized coal. This is achieved by adding a foaming agent or a flotation agent containing the foaming agent as a main component to the water slurry to float the oil-spread coal, and then recovering the floated oil-spread coal.
以下、本発明を第１図に示す工程に従って説明する。Hereinafter, the present invention will be explained according to the steps shown in FIG.
本発明においては、原料炭ｌを粉砕ｖ９．２で粉砕し、
得られた粉砕炭３を混合槽４に供給し、バインダー５お
よび水６を加え、混合して粉砕炭の水スラリーを形成す
る。In the present invention, raw coal 1 is crushed by crushing v9.2,
The obtained pulverized charcoal 3 is supplied to a mixing tank 4, and a binder 5 and water 6 are added and mixed to form a water slurry of pulverized charcoal.
なお、この粉砕炭の水スラリーは、選炭工程のスクリー
ンアンダーでも可能である。Note that this water slurry of pulverized coal can also be made under the screen of the coal cleaning process.
原料炭としては、瀝青炭、亜瀝青炭、褐炭、亜炭等炭質
の如何にかかわらず使用することができ、また、粉砕炭
の粉砕度は後述するように油展着後の浮選回収が可能で
あれば、いかなる粒度であっても良く、浮選回収が可能
な範囲内において適宜決定することができる。As coking coal, bituminous coal, sub-bituminous coal, lignite, lignite, etc. can be used regardless of the quality of the coal, and the degree of pulverization of the pulverized coal can be determined by flotation recovery after oil spreading as described below. For example, the particle size may be any size, and can be appropriately determined within a range that allows flotation recovery.
粉砕機２の種類は、得られる粉砕炭の粒度が上記範囲内
であれば特に限定されず、従来使用されている乾式粉砕
機、または湿式粉砕機を使用することができる。The type of pulverizer 2 is not particularly limited as long as the particle size of the resulting pulverized coal is within the above range, and conventionally used dry pulverizers or wet pulverizers can be used.
バインダー５としては、従来のＯＡ法におけると同様に
、炭化水素油が用いられ、具体的には原油、重油、軽油
などの石油系油、または石炭の水添液化油中の上記石油
系油に対応する留分油である。As the binder 5, as in the conventional OA method, a hydrocarbon oil is used, specifically, petroleum oil such as crude oil, heavy oil, light oil, or the above petroleum oil in hydrogenated liquefied coal oil. The corresponding distillate oil.
バインダーの使用量は、後述する粉砕炭の水スラリーの
強制的を攪拌によって）＜インダーが粉砕炭粒子の表面
に強制的に展着され、このノくインダー展着によって形
成された油展着炭粒子に疎水性が付与されれば、いかな
る量であっても良く、かかる範囲内において適宜、選択
することができる。The amount of binder used is determined by forcibly stirring a water slurry of pulverized coal, which will be described later. Any amount may be used as long as hydrophobicity is imparted to the particles, and it can be appropriately selected within this range.
粉砕炭の水スラリーにおける固形物濃度は、２０〜４０
重量％であり、この濃度範囲において適宜選定すること
ができる。The solids concentration in the water slurry of pulverized coal is 20-40
It is % by weight and can be appropriately selected within this concentration range.
次に得られた粉砕炭の水スラリーを油展着機７に送り、
強制的に攪拌して粉砕炭の脱灰、油展着を行う。Next, the obtained water slurry of pulverized coal is sent to the oil spreading machine 7,
Forced stirring is used to demineralize the pulverized coal and spread the oil.
油展着機７としては、従来のＯＡ法で用いられていた造
粒機を採用することができ、例えば内部軸心に攪拌翼を
有する横型円筒状の油展着機を挙げることができる。As the oil spreading machine 7, a granulator used in the conventional OA method can be employed, and for example, a horizontal cylindrical oil spreading machine having a stirring blade on the internal axis can be used.
油展着機７における強制攪拌による油展着操作によつ°
ζ、粉砕炭粒子にバインダーが展着され、同時に粘土骨
が除去される。Due to the oil spreading operation using forced stirring in the oil spreading machine 7.
ζ, the binder is spread on the crushed charcoal particles, and the clay bones are removed at the same time.
油が展着された粉砕炭は、スラリー母液中では混泥状で
あり、母液の水中に懸濁しでおり、長時間放置すると沈
降する。The pulverized coal on which oil has been spread is in the form of mixed mud in the slurry mother liquor, is suspended in the water of the mother liquor, and will settle if left for a long time.
本発明においては、この粉砕炭の油展着炭のスラリーを
、好ましくはコンディショナー８に供給し、氷１０を更
に添加して油展着炭の濃度を１０〜１５重量％に調節す
る。In the present invention, the oil-spread charcoal slurry of the pulverized coal is preferably supplied to the conditioner 8, and ice 10 is further added to adjust the oil-spread charcoal concentration to 10 to 15% by weight.
この濃度調整は、後述する油展着炭の浮選を容易にする
ためであり、必ずしも必要とするものではない。This concentration adjustment is to facilitate flotation of oil-spread coal, which will be described later, and is not necessarily necessary.
更に本発明においては、コンディショナー８において、
起泡剤、または起泡剤を主成分とする浮選剤９を粉砕炭
の油展着炭に添加する。Furthermore, in the present invention, in the conditioner 8,
A foaming agent or a flotation agent 9 mainly composed of a foaming agent is added to the oil-spread coal of the pulverized coal.
ここで起泡剤とは、粉砕炭の油展着炭の水スラリーを発
泡させるためのものであり、例えばパイン油、テルピネ
オール、ポリオキシプロピレンアルキルエーテル、高級
アルコール等ヲ挙げることができる。Here, the foaming agent is used to foam a water slurry of oil-spread charcoal of pulverized charcoal, and includes, for example, pine oil, terpineol, polyoxypropylene alkyl ether, higher alcohol, and the like.
また、起泡剤を主成分とする浮選剤とは、上記のような
起泡剤と補収剤、例えばケロシン等との混合剤、または
起泡剤と起泡安定剤、例えばアルキロールアミド等との
混合剤を意味し、かかる補収剤は油展着炭を凝集させる
機能を有し、また、起泡安定剤は泡を安定させる機能を
有し、起泡剤のみを使用するか、または起泡剤を主成分
とする浮選剤を使用するかは、原料炭の炭質、灰分量、
油展着炭の粒子径等に応じて適宜、決定される。なお、
これら起泡剤、または起泡剤を主成分とする浮選剤は、
いずれも通常では市販品を使用することができる。A flotation agent whose main component is a foaming agent is a mixture of the above-mentioned foaming agent and a scavenging agent such as kerosene, or a foaming agent and a foaming stabilizer such as an alkylolamide. Collecting agents have the function of coagulating oil-spread coal, and foaming stabilizers have the function of stabilizing foam. Whether to use a flotation agent whose main component is a foaming agent or a foaming agent depends on the quality of coking coal, the ash content,
It is determined as appropriate depending on the particle size of the oil-spread charcoal. In addition,
These foaming agents or flotation agents based on foaming agents are
In both cases, commercially available products can usually be used.
本発明におりる起泡剤、または起泡剤を主成分とする浮
選剤の使用量は、粉砕炭の油展着炭重量の１００〜２０
０ｐｐｍであり、起泡剤を主成分とする浮選剤における
補収剤、または起泡安定剤の量は起泡剤の２０〜３０重
置％である。The amount of the foaming agent or the flotation agent mainly composed of the foaming agent according to the present invention is 100 to 20% of the weight of the oil-spread coal of the pulverized coal.
0 ppm, and the amount of the scavenger or foam stabilizer in the flotation agent whose main component is a foaming agent is 20 to 30% by weight of the foaming agent.
起泡剤または起泡剤を主成分とする浮選剤の使用量が油
展着炭重量の１００ｐｐ＋ｅに満たないと、泡立ちが十
分でなく、油展着炭のｆｆ１選、回収が不完全となり、
また、２００ｐｐｍを越えると、経済性が問題となるの
で好ましくない。If the amount of foaming agent or flotation agent whose main component is a foaming agent is less than 100pp+e of the weight of oil-spread coal, foaming will not be sufficient, and ff1 selection and recovery of oil-spread coal will be incomplete. ,
Moreover, if it exceeds 200 ppm, it is not preferable because economical efficiency becomes a problem.
コンディショナー８において、上記のように起泡剤また
は起泡剤を主成分とする浮選剤９を添加した後に、この
添加物を浮選機１１に供給して油展着炭の浮選を行う。In the conditioner 8, after adding a foaming agent or a flotation agent 9 whose main component is a foaming agent as described above, this additive is supplied to a flotation machine 11 to flotate the oil spread coal. .
即ち、油展着炭１２は展着されたバインダーによって石
炭単独の場合よりも相対的に疎水性になっているので、
起泡剤または起泡剤を主成分とする浮選剤によって生じ
た起泡に付着して水面に浮上し、一方、原料炭中の灰分
１３は炭素分よりも親水性なので浮上せずに沈降する。In other words, the oil-spread coal 12 is made relatively more hydrophobic than the coal alone due to the spread binder.
It adheres to the foam generated by a foaming agent or a flotation agent whose main component is a foaming agent and floats to the water surface.On the other hand, the ash 13 in coking coal is more hydrophilic than the carbon content, so it settles without floating. do.
次いで浮上した造粒炭１２を、通常の浮選法と同様にし
て浮選機により補集すれば、灰分量の少ない油展着炭１
４を得ることができる。Next, if the floated granulated coal 12 is collected by a flotation machine in the same manner as the normal flotation method, oil-spread coal 1 with a low ash content is obtained.
You can get 4.
得られた油展着炭は、ボイラー、発電所等のｆｔＡ料と
して好適に使用される。The obtained oil-spread coal is suitably used as a ftA material for boilers, power plants, etc.
以上述べたように、本発明によれば、油展着炭を起泡剤
、または起泡剤を主成分とする浮選剤を用い、バインダ
ーによって疎水性となっている油展着炭を起泡と共に浮
上させるので、従来の所謂ＯＡ法では分離不能であった
油展着炭と天分を物理的に容易に分離することができる
。As described above, according to the present invention, the oil-spread coal, which has been made hydrophobic by the binder, is raised by using a foaming agent or a flotation agent mainly composed of a foaming agent. Since the oil is floated together with bubbles, it is possible to physically easily separate the oil-spread coal from the natural substance, which was impossible to separate in the conventional so-called OA method.
即ち本発明の方法は、従来のＯＡ法のように装置の、か
つ高値なバインダーによって粉砕炭を造粒する方法とは
異なり、粉砕炭に疎水性を付与する程度の小量のバイン
ダーを用いるので、バインダーの使用量を大幅に削減す
ることができ、油展着炭回収の経済性を著しく高めるこ
とができる。That is, the method of the present invention differs from the conventional OA method in which pulverized coal is granulated using equipment and an expensive binder. , the amount of binder used can be significantly reduced, and the economic efficiency of oil-spread coal recovery can be significantly improved.
さらに本発明の方法は、炭種を選ばず、広くすべての石
炭を処理することができる。Furthermore, the method of the present invention can treat a wide variety of coals regardless of coal type.
即ち、従来のＯＡ法では純炭分にたいして２０〜３０重
量％のバインダーを使用しても、せいぜい５００μ…程
度にしか造粒できず、分離困難であった亜瀝青炭、褐炭
、亜炭を瀝青炭の場合と同様に浮選選炭することができ
る。In other words, in the case of bituminous coal, sub-bituminous coal, brown coal, and lignite, which were difficult to separate, could only be granulated to about 500 μm at most even if 20 to 30% by weight of binder was used based on the pure coal content in the conventional OA method. Similarly, it can be flotated and treated.
更にまた、本発明の方法は、選炭に特別の装置を必要と
せず、従来から用いられている浮選装置がそのまま使用
でき、かつ上記のように原料炭の炭種を選ばないので、
極めて経済的に有利であり、工業的価値は大きい。Furthermore, the method of the present invention does not require any special equipment for coal preparation, and the conventional flotation equipment can be used as is, and as mentioned above, the type of coking coal is not selected.
It is extremely economically advantageous and has great industrial value.
以下、本発明の実施例を述べる。 Examples of the present invention will be described below.
原料とした石炭（灰分２８％）の純炭分に対して７重量
％をＣｍ油を添加し、ＯＡ法型製造工程施し、水スラリ
ー中に化成した油展着炭を１５０ｐｐｍの高級アルコー
ル系起泡剤を用いて浮選し、純炭分回収率９６％でクリ
ーンコール（灰分８．３％）を回収した。7% by weight of Cm oil was added to the pure coal content of raw material coal (ash content 28%), and the oil-spread coal was converted into water slurry using an OA manufacturing process, and was mixed with 150 ppm of higher alcohol-based coal. Clean coal (ash content: 8.3%) was recovered by flotation using a foaming agent with a pure coal recovery rate of 96%.
第１図は本発明の実施例を示す工程図である。
ｌ 原料炭、５ バインダー、７ 油展着機、１１
浮選機。FIG. 1 is a process diagram showing an embodiment of the present invention. l Coking coal, 5 binder, 7 oil spreading machine, 11
flotation machine.
Claims (1)
該粉砕炭の粒子に前記バインダーを展着させて該粉砕炭
の油展着炭の水スラリーを製造し、この水スラリーに起
泡剤または該起泡剤を主成分とする浮選剤を添加して前
記油展着炭を浮上せしめ、この浮上した油展着炭を回収
することを特徴とする粉砕炭の浮選回収方法。Stir the water slurry of ground charcoal to which binder has been added;
Spreading the binder on particles of the pulverized coal to produce a water slurry of oil-spread charcoal of the pulverized coal, and adding a foaming agent or a flotation agent containing the foaming agent as a main component to this water slurry. A method for flotation and recovery of pulverized coal, characterized in that the oil-spread coal is floated and the floated oil-spread coal is recovered.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59146741A JPS6125651A (en) | 1984-07-17 | 1984-07-17 | Floating and recovering method of pulverized coal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59146741A JPS6125651A (en) | 1984-07-17 | 1984-07-17 | Floating and recovering method of pulverized coal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6125651A true JPS6125651A (en) | 1986-02-04 |
Family
ID=15414538
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59146741A Pending JPS6125651A (en) | 1984-07-17 | 1984-07-17 | Floating and recovering method of pulverized coal |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6125651A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6799682B1 (en) | 2000-05-16 | 2004-10-05 | Roe-Hoan Yoon | Method of increasing flotation rate |
| WO2008078389A1 (en) * | 2006-12-26 | 2008-07-03 | Mitsui Engineering & Shipbuilding Co., Ltd. | Apparatus for removing unburned carbon in fly ash |
| US7837963B2 (en) | 2006-10-24 | 2010-11-23 | Taiheiyo Cement Corporation | Method for removing lead from cement burning furnace |
| US7947229B2 (en) | 2005-08-26 | 2011-05-24 | Taiheiyo Cement Corporation | Apparatus and method for dissolution reaction |
| US8282263B2 (en) | 2005-10-31 | 2012-10-09 | Taiheiyo Cement Corporation | Apparatus and method for adding wet ash to cement |
| US8439202B2 (en) | 2006-12-05 | 2013-05-14 | Taiheiyo Cement Corporation | Coal ash treatment method and apparatus |
| US8551223B2 (en) | 2003-10-09 | 2013-10-08 | Taiheiyo Cement Corporation | Method of removing unburned carbon from fly ash |
-
1984
- 1984-07-17 JP JP59146741A patent/JPS6125651A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6799682B1 (en) | 2000-05-16 | 2004-10-05 | Roe-Hoan Yoon | Method of increasing flotation rate |
| US6871743B2 (en) | 2000-05-16 | 2005-03-29 | Mineral And Coal Technologies, Inc. | Methods of increasing flotation rate |
| US8551223B2 (en) | 2003-10-09 | 2013-10-08 | Taiheiyo Cement Corporation | Method of removing unburned carbon from fly ash |
| US7947229B2 (en) | 2005-08-26 | 2011-05-24 | Taiheiyo Cement Corporation | Apparatus and method for dissolution reaction |
| US8282263B2 (en) | 2005-10-31 | 2012-10-09 | Taiheiyo Cement Corporation | Apparatus and method for adding wet ash to cement |
| US7837963B2 (en) | 2006-10-24 | 2010-11-23 | Taiheiyo Cement Corporation | Method for removing lead from cement burning furnace |
| US8439202B2 (en) | 2006-12-05 | 2013-05-14 | Taiheiyo Cement Corporation | Coal ash treatment method and apparatus |
| WO2008078389A1 (en) * | 2006-12-26 | 2008-07-03 | Mitsui Engineering & Shipbuilding Co., Ltd. | Apparatus for removing unburned carbon in fly ash |
| US8127931B2 (en) | 2006-12-26 | 2012-03-06 | Mitsui Engineering & Shipbuilding Co., Ltd. | Apparatus for removing unburned carbon in fly ash |
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