JPH03199288A - Production of coke - Google Patents
Production of cokeInfo
- Publication number
- JPH03199288A JPH03199288A JP33815089A JP33815089A JPH03199288A JP H03199288 A JPH03199288 A JP H03199288A JP 33815089 A JP33815089 A JP 33815089A JP 33815089 A JP33815089 A JP 33815089A JP H03199288 A JPH03199288 A JP H03199288A
- Authority
- JP
- Japan
- Prior art keywords
- coke
- green oil
- coal
- particle size
- furnace temperature
- 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
Links
- 239000000571 coke Substances 0.000 title claims abstract description 30
- 238000004519 manufacturing process Methods 0.000 title claims description 4
- 239000003245 coal Substances 0.000 claims abstract description 15
- 238000010000 carbonizing Methods 0.000 claims abstract description 3
- 239000002245 particle Substances 0.000 abstract description 11
- 238000003763 carbonization Methods 0.000 abstract description 8
- 239000000203 mixture Substances 0.000 abstract description 6
- 239000003208 petroleum Substances 0.000 abstract description 2
- 239000002006 petroleum coke Substances 0.000 abstract description 2
- 238000002485 combustion reaction Methods 0.000 abstract 1
- 238000004227 thermal cracking Methods 0.000 abstract 1
- 238000005292 vacuum distillation Methods 0.000 abstract 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000002956 ash Substances 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 239000010883 coal ash Substances 0.000 description 1
- 238000004939 coking Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000005504 petroleum refining Methods 0.000 description 1
- 239000011295 pitch Substances 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000005979 thermal decomposition reaction Methods 0.000 description 1
Landscapes
- Coke Industry (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は例えば製鉄所で利用されるコークスの製造方法
に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for producing coke used, for example, in steel plants.
〔従来の技術］
高炉操業において使用するコークスは、特に日本のよう
な原料炭の輸入国においては、配合炭を粉砕、混合した
装入炭をコークス炉で乾留して製造する方法が採られて
いる。高炉操業において、コークスは還元剤であるとと
もに、炉内の通気性を確保するために適切な粒径が要求
される。従来は、粒度を大きくするためには、コークス
炉の温度を下げて乾留速度を下げる方法が採られていた
。[Prior Art] The coke used in blast furnace operations, especially in coking coal importing countries such as Japan, is produced by carbonizing the charged coal, which is a mixture of pulverized and mixed coal, in a coke oven. There is. In blast furnace operation, coke is a reducing agent and requires an appropriate particle size to ensure air permeability within the furnace. Conventionally, in order to increase particle size, the method used was to lower the temperature of the coke oven and reduce the carbonization rate.
しかしながら、乾留速度を下げると乾留時間が延び、コ
ークス炉の生産能率の低下をきたす。However, lowering the carbonization rate increases the carbonization time, resulting in a decrease in the production efficiency of the coke oven.
本発明は上記課題を解決して乾留速度を低下させずにコ
ークスの粒径を増大させる手段を開発するべくなされた
ものであり、配合炭にグリーンオイルコークスを添加す
ることにより炉温か同じでもコークス粒径を増大させる
ことができるという知見に基いている。The present invention was made to solve the above problems and develop a means to increase the particle size of coke without reducing the carbonization rate. It is based on the knowledge that particle size can be increased.
グリーンオイルコークスは、未焙焼の石油コークスであ
り、石油精製の際、減圧残柚から熱分解残渣として得ら
れるものであり、暗褐色で堅い多孔質をしている。Green oil coke is unroasted petroleum coke that is obtained as a thermal decomposition residue from vacuum residue during petroleum refining, and is dark brown and hard and porous.
グリーンオイルコークスは配合炭に単に添加混合するだ
けでよく、粉砕は配合炭と一緒に行なわせることができ
る。グリーンオイルコークスの添加率は２〜３０％程度
、好ましくは３〜１５％程度が適当である。Green oil coke can be simply added to and mixed with the coal blend, and pulverization can be performed together with the coal blend. The appropriate addition rate of green oil coke is about 2 to 30%, preferably about 3 to 15%.
グリーンオイルコークスを混合した配合炭は常法により
乾留してコークス化すればよい。The coal blend mixed with green oil coke may be carbonized to coke by a conventional method.
グリーンオイルコークスは流動性が非常に高く、石炭の
乾留時に軟化溶融して石炭中のイナート成分を強固に結
合する。又、他の石油系高流動性ピッチと異なり、揮発
分が低く、乾留中の脱揮発分に伴なう収縮が少なく、亀
裂発生の原因となることが少ない。これらの理市により
、コークスの粒径が増大するものと考えられる。Green oil coke has very high fluidity and softens and melts during carbonization of coal, firmly binding the inert components in the coal. In addition, unlike other petroleum-based high fluidity pitches, it has a low volatile content and shrinks little due to devolatilization during carbonization, so it is less likely to cause cracks. It is thought that these physical processes increase the particle size of coke.
下記のグリーンオイルコークス及び配合炭を用いた。 The following green oil coke and blended coal were used.
グリーンオイ
灰 分
揮発分
固定炭素
最大流動度
ルコークス
０．２％
２５．３％
７４．５％
５０、０００以上
配 合
炭
灰 分
揮発分
８．８％
２５．５％
固定炭素 ６５．７％
最大流動度 ２５０以上反射率
１．１５％
水 分 ９，０％粒度
（３飾以下） ８２．０％上記のグリー
ンオイルコークスを粉砕して０％、３％、６％、９％の
割合で配合炭に添加混合し、それぞれを２５０ｋｇ試験
炉で乾留した。乾留条件は装炭量２５０ｋｇ、炉温９５
０°Ｃ１火落時間Ｉ９．８時間、置時間２．０時間でい
ずれも一定にした。Green oil ash Volatile content Fixed carbon Maximum fluidity Le coke 0.2% 25.3% 74.5% 50,000 or more blended Coal ash Volatile content 8.8% 25.5% Fixed carbon 65.7% Maximum Fluidity 250 or more Reflectance
1.15% Moisture 9.0% Particle size (3 decorations or less) 82.0% The above green oil coke is pulverized and mixed into blended coal at a ratio of 0%, 3%, 6%, and 9%, Each was carbonized in a 250 kg test furnace. Carbonization conditions: coal loading 250 kg, furnace temperature 95
0°C1 fire-off time I was 9.8 hours and standing time was 2.0 hours, both of which were kept constant.
得られたコークスの平均粒径を測定した結果を第１図に
示す。同図に示すようにグリーンオイルコークスの添加
量を増すに従ってコークスの粒径が増大している。The results of measuring the average particle diameter of the coke obtained are shown in FIG. As shown in the figure, the particle size of coke increases as the amount of green oil coke added increases.
本発明により炉温を低下させずにコークスの粒径を増加
させることができる。According to the present invention, the particle size of coke can be increased without lowering the furnace temperature.
第１図はグリーンオイルコークスの添加率とコークスの
粒径の関係を示すグラフである。FIG. 1 is a graph showing the relationship between the addition rate of green oil coke and the particle size of coke.
Claims (1)
とを特徴とするコークスの製造方法A method for producing coke, characterized by adding green oil coke to blended coal and carbonizing it.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33815089A JPH03199288A (en) | 1989-12-28 | 1989-12-28 | Production of coke |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33815089A JPH03199288A (en) | 1989-12-28 | 1989-12-28 | Production of coke |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03199288A true JPH03199288A (en) | 1991-08-30 |
Family
ID=18315383
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP33815089A Pending JPH03199288A (en) | 1989-12-28 | 1989-12-28 | Production of coke |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03199288A (en) |
-
1989
- 1989-12-28 JP JP33815089A patent/JPH03199288A/en active Pending
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