JPH0297412A - Production of activated coke - Google Patents

Production of activated coke

Info

Publication number
JPH0297412A
JPH0297412A JP63249117A JP24911788A JPH0297412A JP H0297412 A JPH0297412 A JP H0297412A JP 63249117 A JP63249117 A JP 63249117A JP 24911788 A JP24911788 A JP 24911788A JP H0297412 A JPH0297412 A JP H0297412A
Authority
JP
Japan
Prior art keywords
coal
wood
caking
activated coke
coke
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP63249117A
Other languages
Japanese (ja)
Inventor
Tokuji Yamaguchi
山口 徳二
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nippon Steel Corp
Original Assignee
Nippon Steel Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Nippon Steel Corp filed Critical Nippon Steel Corp
Priority to JP63249117A priority Critical patent/JPH0297412A/en
Publication of JPH0297412A publication Critical patent/JPH0297412A/en
Pending legal-status Critical Current

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Abstract

PURPOSE:To reduce consumption of expensive binder in the production of activated coke by molding a mixture of pulverized coal with wood crushed to below a specified grain size in a specified proportion and carbonizing the mixture. CONSTITUTION:Pulverized coal comprising caking coal singly or a mixture of caking coal with noncaking coal is mixed with 5-50wt.% wood crushed to <=100mu grain size. After molding the mixture under pressure without adding a binder to produce molded coal, the coal is carbonized. In this case, gases generated during the heating of the wood reduce the caking property of the caking coal, and the gases are interposed between particles of the caking coal since the wood is not softened nor melted, so the gases inhibit firm sticking of molten coal particles. Thus, more pores are formed, and a specified surface area of coke is increased. If the amt. of added wood is <5%, infusibilization of coal is not prompted sufficiently. If the amt. is >=50%, the strength of the molded coal is decreased, and pulverization during production occurs, and the yield of coke is reduced. If the grain size of the wood is >100mu, a contact area of the wood with the coal is insufficiently small and segregation of wood occurs.

Description

【発明の詳細な説明】 (産業上の利用分野) 本発明は活性コークスの製造方法に関する。この方法に
よって製造された活性コークスは、主に廃ガス脱硫用炭
材として使用する。
DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to a method for producing activated coke. The activated coke produced by this method is mainly used as a carbon material for waste gas desulfurization.

(従来の技術) 石炭を原料とした活性コークスは、■冶金用成型コーク
スの製造方法と同様に各種石炭の配合量をコントロール
して粘結剤添加後に成型炭とした後、乾留賦活して製造
する方法(特開昭57−123809号公報)、■石炭
を半成コークスとした後、石炭と混合し粘結剤を加えた
混合物を成型し、この成型炭を乾留賦活して活性コーク
スを製この成型炭を乾留する方法等によって製造されて
いる。
(Conventional technology) Activated coke made from coal is manufactured by controlling the blending amount of various types of coal, adding a binder, making molded coal, and then carbonizing it in the same way as the manufacturing method of molded coke for metallurgy. (Japanese Unexamined Patent Publication No. 57-123809), ■After converting coal into semi-formed coke, the mixture is mixed with coal and a binder is added, and the mixture is molded, and this molded coal is activated by carbonization to produce activated coke. It is manufactured by carbonizing this briquette.

これら活性コークスの製造方法の特徴は、成型炭を乾留
する過程で、成型炭が軟化溶融し膨張現象を示さないよ
うに工夫されていることである。
A feature of these methods for producing activated coke is that, in the process of carbonizing the briquettes, the briquettes are softened and melted so that they do not exhibit an expansion phenomenon.

すなわち、配合原料から生成する活性コークスは、SO
2吸着能を高めるため細孔が発達し比表面軟化溶融現象
を示さないように、非粘結炭を多く配合するか、一部の
石炭をコークス化あるいは酸化処理する等の不溶融化が
必要である。特開昭57−123809号公報では配合
炭の粘結性を低いレベルにコントロールするため褐炭あ
るいは亜歴青炭が配合されている。また、特開昭57−
100910号公報では石炭から半成コークスを製造し
、この半成コークスを主原料にし、成型炭が炭化過程で
軟化溶融し膨張現象を示さないように工夫されている。
In other words, the activated coke produced from the blended raw materials is SO
2. To increase adsorption capacity, it is necessary to add a large amount of non-caking coal or to make some coal infusible by coking or oxidizing it to prevent the development of pores and the phenomenon of specific surface softening and melting. It is. In JP-A-57-123809, lignite or subbituminous coal is blended in order to control the caking of the blended coal to a low level. Also, JP-A-57-
In Japanese Patent No. 100910, semi-formed coke is produced from coal, this semi-formed coke is used as the main raw material, and the briquette is devised to soften and melt during the carbonization process so that it does not exhibit an expansion phenomenon.

さらには、−射的には粘結炭を酸化して、炭化過程で成
型炭が軟化溶融現象を示さないようにされている。
Furthermore, the caking coal is oxidized thermally to prevent the briquette from exhibiting a softening and melting phenomenon during the carbonization process.

(発明が解決しようとする課題) 以上のように、従来技術は活性コークス製造方法として
優れたものであるが、高価な粘結剤を使用するため活性
コークスのコストが高くなる。また粘結剤を使用すると
それだけ製造設備が複雑になる。このような公知技術に
対して、粘結剤を使用することなく、安価に製造出来る
活性コークス製造方法の確立が切望されている。
(Problems to be Solved by the Invention) As described above, the conventional technology is an excellent method for producing activated coke, but the cost of activated coke increases because an expensive binder is used. Furthermore, the use of a binder complicates the manufacturing equipment accordingly. In contrast to such known techniques, there is a strong desire to establish a method for producing activated coke that can be produced at low cost without using a binder.

それを実現する方法を本発明者は特願昭63−195:
185号において提案したが、本発明者はその後さらに
実験を重ねて本発明に至ったものである。
The inventor has proposed a method for realizing this in the following patent application:
No. 185, the present inventor conducted further experiments and arrived at the present invention.

(課題を解決するための手段) 本発明は、微粉砕した石炭に、粒径100μm以下に粉
砕した木材を5重量%以上50重量%未満配合し、粘結
剤を添加することなく加圧成型して成型炭とした後乾留
することを特徴とする活性コークスの製造方法である。
(Means for Solving the Problems) The present invention combines finely pulverized coal with 5% by weight or more and less than 50% by weight of wood that has been pulverized to a particle size of 100 μm or less, and press-molds the mixture without adding a binder. This is a method for producing activated coke, which is characterized in that it is made into briquette charcoal and then carbonized.

(作 用) 本発明は、簡素でしかも機械的強度の高い活性コークス
製造方法の確立について種々研究を重ねた結果、安価な
木材を利用する活性コークスの製造方法を見出したもの
である。
(Function) As a result of various research into establishing a method for producing activated coke that is simple and has high mechanical strength, the present invention has discovered a method for producing activated coke that utilizes inexpensive wood.

本発明における微粉砕した石炭とは、粘結炭単独あるい
は粘結炭に非粘結炭を配合し粉砕した石炭であるが、好
ましくは100μm以下に粉砕した石炭である。
The finely pulverized coal in the present invention is coal that has been pulverized either by caking coal alone or by blending non-caking coal with caking coal, but is preferably pulverized to 100 μm or less.

微粉砕した木材を添加するのは、木材の加熱過程におけ
る発生ガスが粘結炭の粘結性を低下させると共に、木材
が軟化溶融しないため粘結炭粒子間に介在し、石炭粒子
の強固な溶着を防止し、細孔を多く形成させ、比表面積
を大きくするためである。
The reason why finely ground wood is added is that the gas generated during the heating process of the wood reduces the caking properties of the caking coal, and since the wood does not soften and melt, it is interposed between the caking coal particles and increases the hardness of the coal particles. This is to prevent welding, form many pores, and increase the specific surface area.

微粉砕した石炭への木材添加量を5重量%以上と規定し
た9は、5重量%未満では、石炭の粘結性が高い場合石
炭の不溶融化を促進させることが出来ないためである。
The reason why the amount of wood added to finely ground coal is specified as 5% by weight or more is that if the amount is less than 5% by weight, infusibility of the coal cannot be promoted if the caking property of the coal is high.

また上限を50重量%未満としたのは、50重量%以上
添加すると成型炭の機械的強度が低下し、活性コークス
製造工程で粉化が起こり、活性コークスの歩留が低下し
、経済的でないためである。なお、木材の粉砕粒度が粒
径で100μm超では、石炭との接触面積が小さすぎる
と共に木材の偏析が起こるため100μm以下とし、好
ましくは粒径50μm以下とすれば偏析が防止でき、石
炭との接触面積が大きくなり、粘結炭の不溶融化に良い
The reason why the upper limit was set to less than 50% by weight is that if it is added more than 50% by weight, the mechanical strength of the briquette coal will decrease, pulverization will occur in the activated coke manufacturing process, and the yield of activated coke will decrease, making it uneconomical. It's for a reason. If the particle size of the crushed wood exceeds 100 μm, the contact area with coal is too small and wood segregation occurs. Therefore, if the particle size is set to 100 μm or less, and preferably 50 μm or less, segregation can be prevented and the particle size of the wood should be 50 μm or less. The contact area is large, which is good for making coking coal infusible.

さらには、木材の代用として竹、ヤシガラ、バルブ、故
紙、砂腑精製時に発生する砂糖きび残漬、あるいは焼酎
製造時の繊維質残渣等も使用出来る。
Furthermore, as a substitute for wood, bamboo, coconut shell, bulbs, waste paper, sugar cane residue generated during sand refining, or fibrous residue during shochu production can be used.

石炭と微粉砕した木材の混合炭を加圧成型し、成型炭と
してから炭化炉に装入し、600〜900℃まで昇温し
、炭化物とする。この炭化物はそのまま活性コークスと
して使用される。しかし比表面積のより大きい活性コー
クスが必要なときは、公知の方法で更に賦活すると良い
Mixed charcoal of coal and finely pulverized wood is pressure-molded to form briquette coal, which is then charged into a carbonization furnace and heated to 600 to 900°C to form a charcoal. This carbide is used as is as activated coke. However, if activated coke with a larger specific surface area is required, it may be further activated by a known method.

成型炭の炭化は、公知の間接加熱あるいは燃焼排ガスに
よる直接加熱のどちらを用いても良い。
For carbonization of the briquette coal, either known indirect heating or direct heating using combustion exhaust gas may be used.

以上に説明した本発明の方法によって得られる活性コー
クスは、比表面積80 rn2/g以上で、かつ摩耗強
度25%以上の優れた値を示し、廃ガス脱硫用炭材とし
て十分利用できる。
The activated coke obtained by the method of the present invention described above has a specific surface area of 80 rn2/g or more and an excellent abrasion strength of 25% or more, and can be fully utilized as a carbon material for waste gas desulfurization.

(実施例) 次に、本発明を実施例に基いて説明する。使用した石炭
および木材の性状を表1に示す。
(Example) Next, the present invention will be described based on an example. Table 1 shows the properties of the coal and wood used.

表1 実施例1 一74μ嬰に微粉砕した石炭A6o重量%。Table 1 Example 1 Coal A6o pulverized to 174 μm by weight.

80μmに微粉砕した石炭820重量%、および−10
0μmに粉砕した木材20重量%を混合し、混合炭とし
た。この混合炭をロールコンパクタ−で加圧成型し、3
〜lC1nmの成型炭とした。
820% by weight of coal finely ground to 80 μm, and -10
20% by weight of wood crushed to 0 μm was mixed to obtain mixed charcoal. This mixed charcoal was pressurized using a roll compactor, and
It was made into briquette coal of ~1C1 nm.

この成型炭500gを内容積651の燃焼排ガスによる
直接加熱炭化炉で200℃に保定した炭化室に装入し、
加熱速度2.0℃/+ninで900℃まで昇温し、活
性コークスを製造した。この時の燃焼排ガスの組成はH
2O29%、Go、 15%、0□2%、N254%で
あった。
500 g of this briquette coal was charged into a carbonization chamber maintained at 200°C in a direct heating carbonization furnace using combustion exhaust gas with an internal volume of 651,
The temperature was raised to 900°C at a heating rate of 2.0°C/+nin to produce activated coke. The composition of the combustion exhaust gas at this time is H
2O29%, Go 15%, 0□2%, N254%.

生成した活性コークスの比表面積を測定した結果92m
27gで、摩耗強度は32%であった。
As a result of measuring the specific surface area of the generated activated coke, it was 92m.
At 27 g, the abrasion strength was 32%.

なお、摩耗強度の測定方法は日本工業規格(JIS−M
8801)のロガ試験機を用い、試料!50g、回転数
100000回転後の2IO111の篩上に止どまった
量を測定し次式によって摩耗強度とした。
The method for measuring wear strength is based on the Japanese Industrial Standards (JIS-M
Sample! After weighing 50 g and rotating at 100,000 revolutions, the amount of 2IO111 that remained on the sieve was measured and determined as the abrasion strength using the following formula.

実施例2 一200μmに微粉砕した石炭A55重量%。Example 2 55% by weight of coal A finely ground to -200 μm.

−50μml、:@粉砕した木材45重量%を混合し、
混合炭とした後、ロールコンパクターで加圧成型し、3
〜10mmの成型炭とした。
-50 μml: @ mixed with 45% by weight of crushed wood,
After making mixed charcoal, it is pressurized and formed using a roll compactor.
It was made into briquette charcoal of ~10 mm.

この成型炭を実施例1と同様に内容積65flの燃焼排
ガスによる直接加熱炭化炉で200℃に保定した炭化室
に装入し、加熱速度2.2℃/winで900℃まで昇
温し、活性コークスを製造した。
As in Example 1, this briquette was charged into a carbonization chamber maintained at 200°C in a direct heating carbonization furnace using combustion exhaust gas with an internal volume of 65fl, and the temperature was raised to 900°C at a heating rate of 2.2°C/win. Activated coke was produced.

生成した活性コークスの比表面積を測定した結果272
 ra2/gで、摩耗強度は26%であった。
Results of measuring the specific surface area of the generated activated coke 272
The abrasion strength was 26% at ra2/g.

実施例3 一100μmに微粉砕した石炭A40重量%−50μm
に微粉砕した石炭853重量%、および−100μmに
粉砕した木材7重量%を混合し、混合炭とした。この混
合炭をロールコンパクターで加圧成型し、3〜10++
mの成型炭とした。
Example 3 - 40% by weight of coal A finely ground to 100 μm - 50 μm
853% by weight of finely pulverized coal and 7% by weight of wood pulverized to −100 μm were mixed to obtain a mixed charcoal. This mixed charcoal is pressurized and molded using a roll compactor, and
It was made into briquette charcoal of m.

この成型炭を内容積+00uの間接加熱炭化炉でN2ガ
スを通しながら加熱速度1.0℃/minで600℃ま
で昇温し、活性コークスを製造した。
This briquette was heated to 600° C. at a heating rate of 1.0° C./min while passing N2 gas through an indirect heating carbonization furnace with an internal volume of +00 μ to produce activated coke.

生成した活性コークスの比表面積を測定した結果110
m’/、gで摩耗強度は30%であった。
Results of measuring the specific surface area of the generated activated coke 110
The abrasion strength was 30% in terms of m'/g.

実施例4 一50μm&:微粉砕した石炭A 55.0重量%と一
30μmに粉砕した木材45.0重量%を混合し、混合
炭とした。この混合炭をロールコンパクターで加圧成型
し、3〜10m+nの成型炭とした。
Example 4: -50 μm &: 55.0% by weight of finely pulverized coal A and 45.0% by weight of wood pulverized to -30 μm were mixed to obtain mixed charcoal. This mixed charcoal was press-molded using a roll compactor to obtain briquette charcoal of 3 to 10 m+n.

この成型炭を実施例1と同様に内容積6542の燃焼排
ガスによる直接加熱炭化炉で250℃に保定した炭化室
に装入し、加熱速度3.0℃/minで600℃まで昇
温し、活性コークスを製造した。
As in Example 1, this briquette was charged into a carbonization chamber maintained at 250°C in a direct heating carbonization furnace using combustion exhaust gas with an internal volume of 6542, and the temperature was raised to 600°C at a heating rate of 3.0°C/min. Activated coke was produced.

生成した活性コークスの比表面積を測定した結果188
m2/3で、摩耗強度は33%であった。
Results of measuring the specific surface area of the generated activated coke 188
m2/3, the abrasion strength was 33%.

実施例5 実施例2の方法で製造した成型炭を外熱式電気炉に層厚
5m+n程度にし、N2ガスを通しながら3.2t/m
inで600℃まで昇温し、活性コークスを製造した。
Example 5 Molded coal produced by the method of Example 2 was placed in an external heating electric furnace to a layer thickness of approximately 5 m + n, and was heated at 3.2 t/m while passing N2 gas.
The temperature was raised to 600° C. to produce activated coke.

生成した活性コークスの比表面積を測定した結果234
 rn’7gで、摩耗強度は35%であった。
Results of measuring the specific surface area of the generated activated coke 234
At rn'7g, the abrasion strength was 35%.

比較例1 一74μmに微粉砕した石炭A86重量%80μmに微
粉砕した石炭810重量%、および100μmに粉砕し
た木材4重量%を混合し、混合炭とした。この混合炭を
ロールコンパクターで加圧成型し、成型炭とした。
Comparative Example 1 86% by weight of coal A pulverized to 74 μm, 810% by weight of coal pulverized to 80 μm, and 4% by weight of wood pulverized to 100 μm were mixed to obtain a mixed charcoal. This mixed charcoal was pressurized and molded using a roll compactor to obtain briquette charcoal.

この成型炭を実施例1と同様に内容積65℃の燃焼排ガ
スによる直接加熱炭化炉で200℃に保定した炭化室に
装入し、加熱速度2,0℃/minで900℃まで昇温
し、活性コークスを製造した。
As in Example 1, this briquette was charged into a carbonization chamber maintained at 200°C in a direct heating carbonization furnace using combustion exhaust gas with an internal volume of 65°C, and the temperature was raised to 900°C at a heating rate of 2.0°C/min. , produced activated coke.

生成した活性コークスの比表面積を測定した結果20 
m2/zで、摩耗強度は35%であったが、比表面積が
著しく低くなった。
Results of measuring the specific surface area of the generated activated coke20
m2/z, the abrasion strength was 35%, but the specific surface area was significantly lower.

比較例2 74μmに微粉砕した石炭A 30.0重量%、石炭8
15.0重量%、および−100μmに粉砕した木材5
5.0重量%を混合し、混合炭とした。この混合炭をロ
ールコンパクタ−で加圧成型し、成型炭とした。
Comparative Example 2 30.0% by weight of coal A finely pulverized to 74 μm, coal 8
15.0% by weight, and -100 μm crushed wood 5
5.0% by weight was mixed to obtain mixed charcoal. This mixed charcoal was pressurized and molded using a roll compactor to obtain briquette charcoal.

この成型炭を実施例1と同様に内容積65℃の燃焼排ガ
スによる直接加熱炭化炉で200tに保定した炭化憲に
装入し、加熱速度2.(1℃/n+inで900℃まで
昇温し、活性コークスを製造した。
As in Example 1, this briquette was charged into a carbonization furnace maintained at 200 tons in a direct heating carbonization furnace using combustion exhaust gas with an internal volume of 65°C, and the heating rate was 2. (The temperature was raised to 900°C at 1°C/n+in to produce activated coke.

生成した活性コークスの比表面積を測定した結果376
 rn’/gであったが、摩耗強度が11%と低く、機
械的強度が弱く、活性コークスとして使用できなかった
Results of measuring the specific surface area of the generated activated coke 376
rn'/g, but the abrasion strength was as low as 11% and the mechanical strength was weak, so it could not be used as activated coke.

比較例3 一74μmに微粉砕した石炭A70重量%と一80μm
に微粉砕した石炭830重量%を混合し、1′50℃の
電気炉に装入し、空気を吹き込みながら15時間石炭の
酸化処理を行った後、結合剤として軟ピツチ15重量%
を混合し、水分10%にした後、ディスクペレッターで
加圧成型し、成型炭とした。
Comparative Example 3 70% by weight of coal A finely pulverized to -74 μm and -80 μm
830% by weight of finely pulverized coal was mixed with 830% by weight of finely ground coal, charged into an electric furnace at 1'50°C, and oxidized for 15 hours while blowing air. After that, 15% by weight of soft pitch was added as a binder.
The mixture was mixed to have a moisture content of 10%, and then pressurized and molded using a disc pelleter to obtain briquette charcoal.

この成型炭を内容積65JZの燃焼排ガスによる直接加
熱炭化炉で200℃に保定した炭化室に装入し、加熱速
度2.0℃/minで900℃まで昇温し、活性コーク
スを製造した。
This briquette was charged into a carbonization chamber maintained at 200°C in a direct heating carbonization furnace using combustion exhaust gas with an internal volume of 65JZ, and the temperature was raised to 900°C at a heating rate of 2.0°C/min to produce activated coke.

生成した活性コークスの比表面積を測定した結果385
II12/gであり、活性コークスとして十分使用でき
るが、石炭の酸化処理時間を長くする必要があり、経済
的でない。
Results of measuring the specific surface area of the generated activated coke 385
II12/g, and can be used satisfactorily as activated coke, but it is not economical because it requires a long oxidation treatment time for the coal.

(発明の効果) 本発明によれば、機械的強度が強く、比表面積の大きい
すなわちSO2吸着能の高い活性コークスを安価に製造
することができる。
(Effects of the Invention) According to the present invention, activated coke having strong mechanical strength and a large specific surface area, that is, a high SO2 adsorption capacity, can be produced at low cost.

代  理  人representative person

Claims (1)

【特許請求の範囲】[Claims] 微粉砕した石炭に、粒径100μm以下に粉砕した木材
を5重量%以上50重量%未満配合し、粘結剤を添加す
ることなく加圧成型して成型炭とした後乾留することを
特徴とする活性コークスの製造方法。
It is characterized by blending 5% by weight or more and less than 50% by weight of wood that has been pulverized to a particle size of 100 μm or less with finely pulverized coal, and pressurizing it without adding a binder to form briquette charcoal, followed by carbonization. A method for producing activated coke.
JP63249117A 1988-10-04 1988-10-04 Production of activated coke Pending JPH0297412A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP63249117A JPH0297412A (en) 1988-10-04 1988-10-04 Production of activated coke

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP63249117A JPH0297412A (en) 1988-10-04 1988-10-04 Production of activated coke

Publications (1)

Publication Number Publication Date
JPH0297412A true JPH0297412A (en) 1990-04-10

Family

ID=17188200

Family Applications (1)

Application Number Title Priority Date Filing Date
JP63249117A Pending JPH0297412A (en) 1988-10-04 1988-10-04 Production of activated coke

Country Status (1)

Country Link
JP (1) JPH0297412A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11157822A (en) * 1997-11-25 1999-06-15 Cataler:Kk Production of activated carbon

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11157822A (en) * 1997-11-25 1999-06-15 Cataler:Kk Production of activated carbon

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