JPH0819485B2 - Powder coke, anthracite granulation method and sinter production method - Google Patents
Powder coke, anthracite granulation method and sinter production methodInfo
- Publication number
- JPH0819485B2 JPH0819485B2 JP41828090A JP41828090A JPH0819485B2 JP H0819485 B2 JPH0819485 B2 JP H0819485B2 JP 41828090 A JP41828090 A JP 41828090A JP 41828090 A JP41828090 A JP 41828090A JP H0819485 B2 JPH0819485 B2 JP H0819485B2
- Authority
- JP
- Japan
- Prior art keywords
- anthracite
- coke
- raw material
- sintering
- granulating
- 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.)
- Expired - Lifetime
Links
Landscapes
- Manufacture And Refinement Of Metals (AREA)
Description
【0001】[0001]
【産業上の利用分野】本発発明は、粉コークス及び無煙
炭の造粒を可能とし、粉コークスと無煙炭の燃焼効率を
大幅に改善して焼結生産能率や成品歩留りの向上、焼結
鉱品質向上、NOxの大幅低減を実現する、微粉コーク
スと微粉無煙炭の造粒方法と、焼結鉱製造方法に関する
ものである。[Industrial application] The present invention enables granulation of powdered coke and anthracite, and greatly improves the combustion efficiency of powdered coke and anthracite to improve the sintering production efficiency and product yield, and the quality of sintered ore. The present invention relates to a method for granulating fine coke and fine anthracite, and a method for producing sinter, which can improve and significantly reduce NOx.
【0002】[0002]
【従来の技術】従来から焼結鉱の製造には、粉コークス
や無煙炭と焼結原料、副原料を配合して混合し、その配
合原料を造粒機で造粒したのち焼結機に装入し、焼結層
の通気を良好にして操業している。通気を良好にするに
は微粉原料を少なくするのが良く、配合原料の造粒強化
以外に、粉コークスの0.5mm以下を少なくする整粒
強化が図られたり、粉コークスそのものの微粉部分の造
粒もこれまで試みられてきた。しかし今日まで実用化さ
れた例は少ない。例えば、特公昭63−62558号に
は、粒径が0.3mm以下の微細粉を15重量%以上含
む粉コークスに水とセメントを配合した配合原料を転動
造粒するに際して、粒径が1mm以上の粗粒粉コークス
を微細粉量の30重量%以上前記配合材料中に含有せし
める方法が記載されている。しかし、造粒法は従来法と
同様のドラム型或はディスク型転動造粒機であるので造
粒物の強度は弱く、造粒粉コークスと焼結原料を混合、
造粒する過程で造粒粉コークスは崩壊し、その造粒効果
を十分に発揮できない欠点を有している。また、特公昭
63−13475号には、粒径7mm未満100重量%
の粉コークスにセメントと水を加えて混合してこの混合
物を積付けし、セメントの水和反応により形成された水
和物でコークス粒子間が結合されるまで養生し、この積
付け養生物を粒径0.5mm未満が40重量%以下とな
るように解砕することを特徴とする鉄鉱石焼結用粉コー
クスの製造方法が記載されている。しかし、この方法で
は水和物でコークス粒子間が結合されるまでの養生期間
が必要であり、また積付け養生物の解砕時に粒径0.5
mm未満の微粉がかなり発生する欠点がある。2. Description of the Related Art Conventionally, in the manufacture of sintered ore, powdered coke or anthracite, a sintering raw material and an auxiliary raw material are mixed and mixed, and the mixed raw material is granulated with a granulator and then loaded into a sintering machine. It is put into operation and the ventilation of the sintered layer is made good. In order to improve the ventilation, it is better to reduce the amount of fine powder raw material. In addition to the granulation strengthening of the blended raw material, it is possible to strengthen the size of the powder coke by 0.5 mm or less, or to improve the fine powder portion of the coke powder itself. Granulation has also been tried so far. However, there are few examples that have been put to practical use to date. For example, in Japanese Examined Patent Publication No. 63-62558, when a blended raw material obtained by blending water and cement in powder coke containing 15% by weight or more of fine powder having a grain size of 0.3 mm or less, a grain size of 1 mm is used. A method is described in which the above coarse grain coke is contained in the compounding material in an amount of 30% by weight or more based on the amount of fine powder. However, since the granulation method is a drum type or disk type rolling granulator similar to the conventional method, the strength of the granulated material is weak, and the granulated powder coke and the sintering raw material are mixed,
The granulated powder coke disintegrates during the granulation process, and has the drawback that the granulation effect cannot be fully exhibited. In addition, Japanese Examined Patent Publication No. 63-13475 discloses that a particle size of less than 7 mm is 100% by weight.
Cement and water are added to the powdered coke and mixed to stack the mixture, and the hydrate formed by the hydration reaction of the cement is cured until the coke particles are bonded to each other. There is described a method for producing a coke powder for iron ore sintering, which comprises crushing so that a particle size of less than 0.5 mm is 40% by weight or less. However, this method requires a curing period until the coke particles are bonded by the hydrate, and the particle size is 0.5 when the stowed culture is disintegrated.
There is a drawback that a fine powder of less than mm is considerably generated.
【0003】[0003]
【発明が解決しようとする課題】本発明は上記欠点に対
処するもので、焼結用粉コークス及び無煙炭の微粉部分
をセメントを使用することなく造粒して、粒度分布をシ
ャープにして粒径0.25mm以下の微粉を少なくし、
焼結プロセスの生産性、歩留り、焼結鉱品質を向上さ
せ、NOxを低減させる微粉コークス造粒方法及び微粉
無煙炭造粒方法と焼結鉱製造方法を提供するものであ
る。SUMMARY OF THE INVENTION The present invention addresses the above-mentioned drawbacks by granulating the powdered coke for sintering and the fine powder portion of anthracite without the use of cement to make the particle size distribution sharper. Reduce fine powder of 0.25 mm or less,
Provided are a fine coke granulation method, a fine anthracite granulation method, and a sintered ore manufacturing method, which improve the productivity, yield, and quality of the sintering ore of the sintering process and reduce NOx.
【0004】[0004]
【課題を解決するための手段】すなわち本発明は、
(1)粒径1.0mm以下が70wt%以上の粉コーク
スまたは無煙炭を、含有水分が10〜28wt%になる
ように水分調整しながら遠心力を利用した造粒機を用い
て50rpm以上しかもトータル回転数が100〜70
0回転で造粒することを特徴とする粉コークス・無煙炭
の造粒方法、(2)粒径1.0mm以下が70wt%以
上の粉コークスまたは無煙炭に、生石灰を全体の1〜3
0wt%添加し、含有水分が10〜28wt%になるよ
うに水分調整しながら遠心力を利用した造粒機を用いて
50rpm以上しかもトータル回転数が100〜700
回転で造粒することを特徴とする粉コークス・無煙炭の
造粒方法、(3)粒径1.0mm以下が70wt%以上
の粉コークスまたは無煙炭に、T.Feが30wt%以
上含有する焼結原料を全体の10〜50wt%になるよ
うに配合したのち、含有水分が10〜28wt%になる
ように水分調整しながら遠心力を利用した造粒機を用い
て50rpm以上しかもトータル回転数が100〜70
0回転で造粒することを特徴とする粉コークス・無煙炭
の造粒方法、(4)粒径1.0mm以下が70wt%以
上の粉コークスまたは無煙炭に、150〜400℃の熱
風を粉コークス表面に吹き付け、含有水分が10〜28
wt%になるように水分調整しながら遠心力を利用した
造粒機を用いて50rpm以上しかもトータル回転数が
100〜700回転で造粒することを特徴とする粉コー
クス・無煙炭の造粒方法、(5)粒径1.0mm以下が
70wt%以上の粉コークスまたは無煙炭を、含有水分
が10〜28wt%になるように水分調整しながら遠心
力を利用した造粒機を用いて50rpm以上しかもトー
タル回転数が100〜700回転で造粒しながら、0.
25〜3.0mmの造粒粉が80wt%以上になるよう
に調整してから、配合原料全体の0.1〜5wt%にな
るように焼結原料に混合し、そして配合原料全体を造粒
したのち焼結することを特徴とする焼結鉱製造方法、
(6)粒径1.0mm以下が70wt%以上の粉コーク
スまたは無煙炭を、含有水分が10〜28wt%になる
ように水分調整しながら遠心力を利用した造粒機を用い
て50rpm以上しかもトータル回転数が100〜70
0回転で造粒しながら、0.25〜3.0mmの造粒粉
が80wt%以上になるように調整してから、配合原料
全体の0.1〜5wt%になるように焼結原料に混合
し、そして配合原料全体を造粒したのち焼結ベッドの層
高を700〜1000mmの高層厚に維持しながら焼結
することを特徴とする焼結鉱製造方法、(7)粒径1.
0mm以下が70wt%以上の粉コークスまたは無煙炭
を、含有水分が10〜28wt%になるように水分調整
しながら遠心力を利用した造粒機を用いて50rpm以
上しかもトータル回転数が100〜700回転で造粒し
ながら、0.25〜3.0mmの造粒粉が80wt%以
上になるように調整してから配合原料全体の0.1wt
%〜5wt%になるように焼結原料に混合し、かつそれ
以外に焼結原料に配合する粗粒粉コークスの3mm以上
を20wt%以下に調整してから配合原料全体を焼結す
ることを特徴とする焼結鉱製造方法、(8)粒径1.0
mm以下が70wt%以上の粉コークスまたは無煙炭
に、生石灰を1〜30wt%添加して、含有水分が10
〜28wt%になるように水分調整しながら遠心力を利
用した造粒機を用いて50rpm以上しかもトータル回
転数が100〜700回転で造粒しながら0.25〜
3.0mmの造粒粉が80wt%以上になるように調整
してから、配合原料全体の0.1〜5wt%になるよう
に焼結原料に混合し、そして配合原料全体を造粒したの
ち焼結することを特徴とする焼結鉱製造方法、(9)粒
径1.0mm以下が70wt%以上の粉コークスまたは
無煙炭に、FeOが10wt%以上含有する焼結原料を
全体の10〜50wt%配合したのち、含有水分が10
〜28wt%になるように水分調整しながら遠心力を利
用した造粒機を用いて50rpm以上しかもトータル回
転数が100〜700回転で造粒してから、配合原料全
体の0.1〜5wt%になるように焼結原料に混合し、
そして造粒したのち焼結することを特徴とする焼結鉱製
造方法、(10)粒径1.0mm以下が70wt%以上
の粉コークスまたは無煙炭に、150〜400℃の熱風
を粉コークス表面に吹き付け、含有水分が10〜28w
t%になるように水分調整しながら遠心力を利用した造
粒機を用いて50rpm以上しかもトータル回転数が1
00〜700回転で造粒してから、配合原料全体の0.
1〜5wt%になるように焼結原料の混合し、そして造
粒したのち焼結することを特徴とする焼結鉱製造方法、
(11)粒径1.0mm以下が70wt%以上の粉コー
クスまたは無煙炭を、含有水分が10〜28wt%にな
るように水分調整しながら遠心力を利用した造粒機を用
いて50rpm以上しかもトータル回転数が100〜7
00回転で造粒しながら、配合原料全体の0.1〜5w
t%になるように焼結原料に混合し、また副原料として
焼結原料に配合する石灰石の1mm以下を30%以下に
して混合し、そしてこれらの配合原料全体を造粒したの
ち焼結することを特徴とする焼結鉱製造方法、である。That is, the present invention is as follows.
(1) A powder coke or anthracite with a particle size of 1.0 mm or less of 70 wt% or more is adjusted to a water content of 10 to 28 wt% by using a granulator utilizing centrifugal force and 50 rpm or more and a total amount. Rotation speed is 100-70
Granulation method of powder coke / anthracite characterized by granulating at 0 revolutions, (2) Powdered coke or anthracite with a particle size of 1.0 mm or less of 70 wt% or more, and quick lime of 1 to 3
Add 0 wt% and adjust the water content so that the water content is 10-28 wt%, and use a granulator that utilizes centrifugal force to obtain 50 rpm or more and a total rotation speed of 100-700.
Granulation method of powder coke / anthracite characterized by granulation by rotation, (3) powder coke or anthracite having a particle size of 1.0 mm or less of 70 wt% or more, T. After blending the sintering raw material containing 30 wt% or more of Fe so as to be 10 to 50 wt% of the whole, a granulator using centrifugal force is used while adjusting the water content to be 10 to 28 wt%. More than 50 rpm and the total number of rotations is 100-70
Granulation method of powder coke / anthracite characterized by granulating at 0 revolutions, (4) Powder coke or anthracite having a particle size of 1.0 mm or less of 70 wt% or more, and hot air of 150 to 400 ° C. on the surface of the powder coke. It is sprayed on and the water content is 10-28
Granulating method of powder coke / anthracite, characterized by granulating at 50 rpm or more and a total number of revolutions of 100 to 700 using a granulator utilizing centrifugal force while adjusting the water content to be wt%. (5) Using powdered coke or anthracite with a particle diameter of 1.0 mm or less of 70 wt% or more, adjusting the water content to 10 to 28 wt% by using a granulator utilizing centrifugal force and totaling 50 rpm or more. While granulating at a rotation speed of 100 to 700 rotations, 0.
After adjusting the granulated powder of 25 to 3.0 mm to be 80 wt% or more, mix it with the sintering raw material so as to be 0.1 to 5 wt% of the entire blended raw material, and granulate the entire blended raw material. A method for producing a sintered ore, characterized by comprising sintering
(6) A powder coke or anthracite with a particle size of 1.0 mm or less of 70 wt% or more is adjusted to a water content of 10 to 28 wt% using a granulator utilizing centrifugal force and a total of 50 rpm or more. Rotation speed is 100-70
While granulating at 0 revolutions, adjust the granulated powder of 0.25 to 3.0 mm to 80 wt% or more, and then use as a sintering raw material so as to be 0.1 to 5 wt% of the entire blended raw material. A method for producing a sintered ore, which comprises mixing and granulating the whole raw material mixture, and then sintering while maintaining the layer height of the sintering bed at a high layer thickness of 700 to 1000 mm, (7) grain size 1.
Use a granulator that utilizes centrifugal force while adjusting the water content of powder coke or anthracite with a diameter of 0 mm or less of 70 wt% or more to 10 to 28 wt% and a total rotation speed of 100 to 700 rotations. While granulating, adjust the granulated powder of 0.25 to 3.0 mm to 80 wt% or more, and then 0.1 wt
% To 5 wt%, and other than that, adjust 3 mm or more of the coarse grain coke to be mixed into the sintering raw material to 20 wt% or less, and then sinter the entire raw material mixture. Characteristic sinter production method, (8) Particle size 1.0
1 to 30 wt% of quick lime is added to powder coke or anthracite having a mm of 70 wt% or more to have a water content of 10
Using a granulator that utilizes centrifugal force while adjusting the water content to ˜28 wt%, 0.25-250 while granulating at 50 rpm or more and a total rotation speed of 100-700 rotations.
After adjusting the granulated powder of 3.0 mm to 80 wt% or more, it is mixed with the sintering raw material so as to be 0.1 to 5 wt% of the entire blended raw material, and the entire blended raw material is granulated. Sintering ore manufacturing method characterized by sintering, (9) 10 to 50 wt% of the total of sintering raw material containing 10 wt% or more of FeO in powder coke or anthracite with a grain size of 1.0 mm or less of 70 wt% or more % Content is 10%
0.1 to 5 wt% of the whole blended raw material after granulating at 50 rpm or more and a total number of revolutions of 100 to 700 using a granulator utilizing centrifugal force while adjusting the water content to be ~ 28 wt% To the sintering raw material,
Then, a method for producing a sintered ore characterized by granulating and sintering, (10) powder coke or anthracite having a particle size of 1.0 mm or less of 70 wt% or more, and hot air of 150 to 400 ° C. on the surface of the powder coke. Spraying, the water content is 10 ~ 28w
Using a granulator that utilizes centrifugal force while adjusting the water content to t%, 50 rpm or more and the total number of rotations is 1
After granulating at 0 to 700 revolutions, the total content of the blended raw materials is 0.
A method for producing a sintered ore, which comprises mixing sintering raw materials so as to be 1 to 5 wt%, granulating, and then sintering.
(11) Powder coke or anthracite with a particle size of 1.0 mm or less of 70 wt% or more is adjusted to a water content of 10 to 28 wt% by using a granulator utilizing centrifugal force and a total of 50 rpm or more. Rotation speed is 100 to 7
While granulating at 00 revolutions, 0.1-5w of the whole blended raw material
The limestone to be mixed with the sintering raw material so as to be t% is added to the sintering raw material as an auxiliary raw material in an amount of 1% or less to 30% or less, and the whole of the mixed raw material is granulated and then sintered. A method for producing a sinter, comprising:
【0005】[0005]
【作 用】以下、図面にもとづいて本発明を具体的に説
明する。図1は、本発明を実施する装置の一例を示す工
程図である。造粒コークスや造粒無煙炭1を含む粉コー
クスや無煙炭2と主原料(鉱石等)、副原料(石灰石、
蛇紋岩等)からなる焼結原料3は、1次ミキサー4で混
合したのち2次ミキサー5で造粒し、焼結機6で焼成す
る。これらのミキサー4,5にはドラム型か皿型の造粒
機が多く使われている。本発明では、粒径1mm以下が
70%以上の粉コークスや無煙炭、具体的には篩分け装
置で篩分けられた微粉コークスと微粉無煙炭、コークス
乾式消化設備から発生する集塵粉(一般にはCDQ粉と
称する)、通常の粉コークスまたは無煙炭を1mm以下
が70wt%以上に粉砕したもの等、を遠心力を利用し
た特定の造粒条件下で造粒したのち、他の粗粒部分の粉
コークスや無煙炭を、主としてコンベヤー上やホッパー
内で混合し、そして1次ミキサー4で他の焼結原料と混
合してから、2次ミキサー5で配合原料全体を造粒す
る。本発明でいう、遠心力を利用した造粒機7とは、造
粒対象粒子に高速回転力を付与して、粒子内の水分がそ
の遠心力によって粒子表層に向かう状態を発現する態様
を呈するものをいい、例えば、特公昭41−563号公
報や、造粒便覧(日本粉体工業協会)P422〜425
等にマルメライザー法として示されている高速転動方式
の造粒機が最も良く、それに次いで、高速回転羽根によ
る撹拌とパンの回転により造粒するアイリッヒミキサー
〔混合混錬技術(日本粉体工業協会)P209〜21
0〕や、回転数を高く出来るコンクリートミキサー〔混
合混錬技術(日本粉体工業協会)P185〜186〕な
どの造粒機が良い。アイリッヒミキサーの場合は、高速
回転羽根の回転がマルメライザー底部の円盤の回転とほ
ぼ同じ効果を発揮すると考えられるので、高速回転羽根
の回転数を本発明で表示している造粒機の回転数に置き
換えることは可能である。遠心力を利用した造粒機7の
代表的構造は、図2(a),(b)に示すように、固定
円筒10の底部において凹凸のある、または平面状のプ
レート9が高速回転するものである。底の円盤9を高速
で回転させ、粒子8を流動化させることにより壁10と
粒子7間摩擦力で粒子8が回転する。この粒子8自体の
回転により粒子内の水分はつねに粒子表層に向かっては
じき出されるので、強固な造粒物11の生成が可能とな
る。本発明の粉コークスや無煙炭を造粒するに際して、
該粒子の含有水分は10〜28wt%に調節するもので
あり、含有水分が10wt%未満では所定粒径範囲の強
固な造粒物にならず、また、含有水分が28wt%を越
えると造粒対象粒子が造粒機壁面に付着堆積し造粒効率
を阻害する。造粒機の回転数について種々の検討をした
結果、50rpm以上でないと遠心力が十分に働かな
い。また転動距離を増やさないと造粒効果が出てこない
ので100回転以上は必要で、700回転を越えると効
果が飽和する傾向が見られた。当然ながら回転半径が大
きくなるほど遠心力は増加する。回転半径を150mm
から2000mmまで変化させて造粒効果を確認する試
験を実施したが、2000mmの回転半径でも50rp
m以下では遠心力の働きは十分でなく、そしてトータル
の回転数も100回転以上が必要であった。またいずれ
の回転半径の試験でも、トータルの回転数が700回転
を越えると造粒効果は飽和した。本試験では600Фの
マルメライザーを使用して、300rpmで1.5分間
の造粒をした。この造粒法では、当然ながら生石灰を全
体の1wt%以上添加すると粒子表層に出てきた水分を
生石灰が吸収するので、水分の浸透性が増して粒子内の
水分が多く表層部に出てくるようになるので強固な造粒
物をより生成し易くなる。但し、生石灰が全体の30w
t%を越えると効果は横這いから下降傾向になり、生石
灰の廻りに粉コークスや無煙炭が付着したり生石灰反応
熱による粉コークスや無煙炭水分の蒸発量が多くなるた
め造粒物の強度が低下する悪影響が顕著になる。この生
石灰添加法では、生石灰反応熱により粉コークスや無煙
炭水分の一部が蒸発したり生石灰の結晶水として吸収さ
れたりするので造粒過程でこれらの水分量の70%以上
の水を補給するのがより好ましい。生石灰の代替として
150〜400℃の熱風を粉コークスや無煙炭表面へ吹
き付けた場合も水分の浸透性を増加させる効果がみられ
た。この方法も蒸発水分の70%程度の水分を補給する
方法が好ましい。また、T.Feが30wt%以上の焼
結原料や、FeOを10wt%以上含有するスケール・
磁鉄鉱系鉄鉱石を10wt%以上添加すると、造粒物の
比重が増して遠心力が増加し、水分の浸透性の増加によ
り強固な造粒物が形成された。この場合は50wt%以
上の添加になると効果は横這いになった。FeOが10
wt%以上含有するスケール・磁鉄鉱系鉄鉱石を10w
t%以上添加する場合はNox低減効果が顕著に見られ
た。造粒コークスや造粒無煙炭の添加量を変化させたと
ころ、0.1wt%以上から効果が見られ始め、5.0
wt%以上になるとその他の熱源の発熱量も加わって熱
過剰になり、むら焼けなどの悪影響が顕著になった。粗
粒粉コークスの3mm以上を20%以下に調整してから
焼結原料に添加すると、成品歩留りはより向上した。層
高については、焼結過程の通気性が改善される場合は層
厚を増加できる。層厚を増加するとさらに効果が増し、
層厚を700mm以上にすると成品歩留りが顕著に向上
し始め、1000mmを越えると通気性が逆に悪化し始
めて成品歩留りが低下する傾向となった。また微粉であ
る1mm以下が30%未満になるように整粒した石灰石
を焼結時に同時に配合すると、焼結過程の通気性改善に
相乗効果が見られ生産能率や成品歩留が向上した。[Operation] The present invention will be specifically described below with reference to the drawings. FIG. 1 is a process diagram showing an example of an apparatus for carrying out the present invention. Granulated coke and powdered coke including granulated anthracite 1 and anthracite 2 and main raw materials (ore etc.), auxiliary raw materials (limestone,
A sintering raw material 3 made of serpentine etc. is mixed by a primary mixer 4, granulated by a secondary mixer 5, and fired by a sintering machine 6. Drum type or plate type granulators are often used for these mixers 4 and 5. In the present invention, powder coke and anthracite having a particle size of 1 mm or less of 70% or more, specifically, fine coke and fine anthracite that have been sieved by a sieving device, and dust collection dust (generally CDQ (Hereinafter referred to as powder), ordinary powder coke or anthracite crushed to 70 wt% or more of 1 mm or less, etc., and then granulated under specific granulation conditions using centrifugal force, and then powder coke of other coarse particles Anthracite is mixed mainly on a conveyor or in a hopper, and is mixed with other sintering raw materials in the primary mixer 4, and then the entire blended raw material is granulated in the secondary mixer 5. In the present invention, the granulator 7 utilizing centrifugal force has a mode in which a high-speed rotating force is applied to the particles to be granulated so that the water content in the particles is directed toward the surface layer of the particles by the centrifugal force. For example, Japanese Patent Publication No. 41-563 and Granular Handbook (Japan Powder Industry Association) P422-425.
The best is the high-speed rolling type granulator, which is shown as the Marumerizer method in, etc., followed by the stirring by the high-speed rotating blade and the rotation of the pan. Industrial Association) P209-21
0] or a granulator such as a concrete mixer [mixing and kneading technology (Japan Powder Industry Association) P185-186] that can increase the number of revolutions. In the case of an Eirich mixer, it is considered that the rotation of the high-speed rotary blade has almost the same effect as the rotation of the disk at the bottom of the Marumerizer, so the rotation speed of the high-speed rotary blade is indicated by the present invention. It can be replaced by a number. A typical structure of the granulator 7 utilizing the centrifugal force is, as shown in FIGS. 2 (a) and 2 (b), one in which a plate 9 having irregularities or a flat plate at the bottom of the fixed cylinder 10 rotates at high speed. Is. By rotating the disk 9 at the bottom at a high speed to fluidize the particles 8, the frictional force between the wall 10 and the particles 7 causes the particles 8 to rotate. Due to the rotation of the particles 8 themselves, the water in the particles is always repelled toward the surface layer of the particles, so that a strong granulated material 11 can be generated. When granulating the powder coke and anthracite of the present invention,
The water content of the particles is adjusted to 10 to 28 wt%, and if the water content is less than 10 wt%, it will not be a solid granulated product in the predetermined particle size range, and if the water content exceeds 28 wt%, it will be granulated. The target particles adhere to and accumulate on the wall surface of the granulator and hinder the granulation efficiency. As a result of various studies on the rotation speed of the granulator, the centrifugal force does not work sufficiently unless the rotation speed is 50 rpm or more. Further, since the granulation effect does not appear unless the rolling distance is increased, 100 rpm or more is required, and the effect tends to be saturated when it exceeds 700 rpm. Naturally, the centrifugal force increases as the radius of gyration increases. Turning radius 150mm
The test to confirm the granulation effect was carried out by changing from 1 to 2000 mm.
If it is less than m, the action of centrifugal force is not sufficient, and the total number of rotations must be 100 or more. In addition, in any of the radius gyration tests, the granulation effect was saturated when the total number of revolutions exceeded 700. In this test, a 600 μm marumerizer was used, and granulation was performed at 300 rpm for 1.5 minutes. In this granulation method, of course, when quick lime is added in an amount of 1 wt% or more of the whole, the quick lime absorbs the water that appears in the surface layer of the particle, so the permeability of water increases and a large amount of water in the particle appears in the surface layer. As a result, it becomes easier to generate a strong granulated product. However, quicklime is the whole 30w
If it exceeds t%, the effect will level off and decline, and the coke and anthracite will adhere around the quicklime and the amount of coke and anthracite water vaporized by the heat of the quicklime reaction will increase the strength of the granulated product. The adverse effect becomes noticeable. In this quick lime addition method, some of the water content of powder coke and anthracite coal is evaporated or absorbed as crystal water of quick lime due to the heat of quick lime reaction, so 70% or more of the water content is replenished during the granulation process. Is more preferable. The effect of increasing the water permeability was also observed when hot air at 150 to 400 ° C. was blown onto the powder coke or anthracite surface as an alternative to quicklime. This method is also preferably a method of supplying about 70% of the evaporated water. Also, T.I. Sintering raw material containing 30 wt% or more of Fe, or scale containing 10 wt% or more of FeO.
When magnetite-based iron ore was added in an amount of 10 wt% or more, the specific gravity of the granulated product increased, the centrifugal force increased, and the water permeability increased, forming a strong granulated product. In this case, the effect leveled off at 50 wt% or more. FeO is 10
10w scale / magnetite iron ore containing more than wt%
When added in an amount of t% or more, the Nox reduction effect was remarkably observed. When the addition amount of granulated coke or granulated anthracite was changed, the effect began to be seen from 0.1 wt% or more, and 5.0
If it is more than wt%, the heat generation amount of other heat sources is also added to cause excessive heat, and the adverse effects such as uneven burning become remarkable. When 3 mm or more of the coarse grain coke was adjusted to 20% or less and then added to the sintering raw material, the product yield was further improved. Regarding the layer height, the layer thickness can be increased if the air permeability during the sintering process is improved. If the layer thickness is increased, the effect will increase further,
When the layer thickness is 700 mm or more, the product yield starts to be remarkably improved, and when the layer thickness exceeds 1000 mm, the air permeability starts to deteriorate and the product yield tends to decrease. Further, when limestone, which was fine powder less than 1 mm and less than 30%, was mixed at the same time during sintering, a synergistic effect was found in improving the air permeability in the sintering process, and the production efficiency and product yield were improved.
【0006】[0006]
【実施例】遠心力を利用した造粒機として、不二電機工
業▲株式会社▼のマルメライザー(製品名)を使用して
次の条件で粉コークスと無煙炭の造粒効果を調べた。ま
ず空気吹き付けによる分級法で粉コークスと無煙炭を篩
分けて1mm以下70wt%以上の微粉コークスまたは
微粉無煙炭を作成し、含有水分が10wt%以上28w
t%以下の範囲に調整しながらマルメライザーで1.5
分間造粒した。なお、含有水分が10wt%未満では水
分不足で強固な造粒物が出来ず、また28wt%を越え
ると水分過剰による造粒機側壁への付着が激しくなる現
象が見られた。1mm以下の微粉量の多少で最適水分量
は変動するが、その水分量はすべてが10wt%以上2
8wt%以下の範囲であつた。また生石灰を1wt%以
上添加すると造粒効果が増し25wt%までは直線的に
その効果が増し、それから30wt%までは効果が横這
い傾向になり30wt%を越えると横這いから下降傾向
となった。造粒度を向上させるには生石灰配合を増加さ
せると良いがバインダーコストが高くなるので、操業改
善効果を考慮しながら生石灰配合はできるだけ少ない値
に維持するのが好ましい。したがって、実施例での生石
灰配合は5wt%とした。造粒前後の微粉コークスと微
粉無煙炭の粒度分布改善の一例を、図3(a),(b)
に示した。粉コークスならびに無煙炭を本発明法にもと
づいて造粒すると、粉コークスならびに無煙炭の粒度分
布は極めてシャープになり、かつ0.25mm未満が零
に近くなるので粒度分布の改善は顕著である。表1に鍋
試験に使用した配合原料の配合割合、表2に粉コークス
・無煙炭の造粒方法、表3に鍋試験の各水準、表4
(1),(2)に鍋試験に使用した粉コークスと無煙炭
の粒度分布、表5に石灰石の粒度分布を示した。造粒コ
ークス・造粒無煙炭に生石灰やスケールを添加する場合
は、表1に示す配合割合を守って、表2に示す条件でそ
の一部を造粒コークスに回した。 図4(a)には粉コークス造粒鍋試験結果の生産率、成
品歩留り、コークス原単位、TI(冷間強度、JISM
8712により測定)、RDI(還元粉化性、製銑部会
法)、RI(還元率、JISM8713)粉コークスの
燃焼効率、及び排ガス中NOxを示した。図4(b)に
は無煙炭造粒鍋試験結果の生産率、成品歩留り、無煙炭
原単位、TI(冷間強度、JISM8712により測
定)、RDI(還元粉化性、製銑部会法)、RI(還元
率、JISM8713)、無煙炭の燃燃焼効率、及び排
ガス中NOxを示した。図5(a)には焼結過程の粉コ
ークス燃焼状況の一例、図5(b)には焼結過程の無煙
炭の燃焼状況の一例を示した。その結果、微粉コークス
ならびに微粉無煙炭の造粒により次の効果が示された。 (1)粉コークス・無煙炭の粒度分布がシャープになっ
て焼結ベッドの通気性が改善し、生産性が大幅に向上す
る。 (2)焼結ベッドの通気性改善と粉コークス・無煙炭の
燃焼速度向上により、特に第5図(1),(2)に示す
ように焼結過程前半の粉コークス。無煙炭の燃焼速度が
増すため上層部への熱量供給が増え、焼結ベッド上層部
の歩留りが大幅に改善されて成品歩留りとTI(冷間強
度)が向上する。コークス原単位も大幅に低減する。 (3)焼結ベッドの通気性改善と上層から下層までの均
一焼成により、RDI(還元粉化性)ならびにRI(還
元率)が向上する。RIの向上は高炉燃料比を大幅に低
減させ、高炉安定操業のみならず出銑比向上にも寄与す
る。 (4)粉コークス・無煙炭の燃焼性改善により、カーボ
ンの燃焼効率が増して排ガス中COが低減し、かつ排ガ
ス中NOxが大幅に低減される。[Examples] As a granulator utilizing centrifugal force, a marumerizer (product name) manufactured by Fuji Electric Co., Ltd. was used to examine the granulating effect of coke powder and anthracite under the following conditions. First, powder coke and anthracite are sieved by a classification method by air blowing to make fine coke or fine anthracite of 1 mm or less and 70 wt% or more, and water content is 10 wt% or more and 28 w
1.5 with the Marumerizer while adjusting to a range of t% or less
Granulated for minutes. When the water content was less than 10 wt%, a strong granulated product could not be formed due to lack of water, and when it exceeded 28 wt%, a phenomenon in which adhesion to the side wall of the granulator became severe due to excess water was observed. The optimum water content varies depending on the amount of fine powder of 1 mm or less, but the water content is 10 wt% or more 2
It was in the range of 8 wt% or less. Further, when quick lime was added in an amount of 1 wt% or more, the granulation effect increased, and the effect increased linearly up to 25 wt%, and then the effect tended to level up to 30 wt%, and leveled off from 30 wt% and then decreased. In order to improve the grain size, it is better to increase the content of quick lime, but the binder cost becomes higher. Therefore, it is preferable to keep the content of quick lime as low as possible while considering the operation improvement effect. Therefore, the quicklime content in the examples was set to 5 wt%. An example of improving the particle size distribution of fine coke and fine anthracite before and after granulation is shown in Figs. 3 (a) and 3 (b).
It was shown to. When powdered coke and anthracite are granulated based on the method of the present invention, the particle size distribution of the powdered coke and anthracite becomes extremely sharp and the particle size distribution of less than 0.25 mm is close to zero. Table 1 shows the mixing ratio of the raw materials used in the pot test, Table 2 shows the granulation method of powder coke and anthracite, Table 3 shows each level of the pot test, and Table 4
The particle size distributions of powder coke and anthracite used in the pan test are shown in (1) and (2), and the particle size distribution of limestone is shown in Table 5. When adding quick lime or scale to the granulated coke / granulated anthracite, the mixing ratio shown in Table 1 was observed, and a part thereof was turned into granulated coke under the conditions shown in Table 2. Fig. 4 (a) shows the production rate, product yield, coke consumption rate, and TI (cold strength, JISM) of the powder coke granulation pan test results.
8712), RDI (reducing powderability, pig iron section method), RI (reduction rate, JISM8713), combustion efficiency of coke powder, and NOx in exhaust gas. Fig. 4 (b) shows the production rate of the anthracite granulating pot test result, product yield, anthracite unit consumption, TI (cold strength, measured by JISM8712), RDI (reducing powdering property, pig iron section method), RI ( The reduction rate, JISM8713), the combustion and combustion efficiency of anthracite, and the NOx in the exhaust gas are shown. FIG. 5A shows an example of the powder coke combustion state during the sintering process, and FIG. 5B shows an example of the anthracite combustion state during the sintering process. As a result, the following effects were shown by granulation of fine coke and fine anthracite. (1) The particle size distribution of powder coke and anthracite is sharpened, the air permeability of the sintering bed is improved, and the productivity is greatly improved. (2) By improving the air permeability of the sintering bed and improving the burning rate of powder coke and anthracite, powder coke in the first half of the sintering process, in particular, as shown in Fig. 5 (1) and (2). Since the burning rate of anthracite increases, the amount of heat supplied to the upper layer increases, and the yield of the upper layer of the sintering bed is greatly improved, improving the product yield and TI (cold strength). The coke consumption rate is also significantly reduced. (3) RDI (reducing powderability) and RI (reduction rate) are improved by improving the air permeability of the sintering bed and by uniformly baking the upper layer to the lower layer. The improvement of RI significantly reduces the fuel ratio of the blast furnace and contributes not only to stable operation of the blast furnace but also to improvement of the tap ratio. (4) By improving the combustibility of powder coke / anthracite, the combustion efficiency of carbon is increased, CO in exhaust gas is reduced, and NOx in exhaust gas is significantly reduced.
【0007】[0007]
【発明の効果】本発明によれば、粉コークスならびに無
煙炭の微粉部分の造粒により粉コークス・無煙炭の粒度
分布がシャープになって焼結過程の通気性と粉コークス
・無煙炭の燃焼性が改善され、焼結プロセスの生産性、
成品歩留り、焼結鉱品質が大幅に向上し、さらに排ガス
中NOxも大幅に低減した。EFFECTS OF THE INVENTION According to the present invention, the particle size distribution of powder coke / anthracite is sharpened by granulating the fine powder portion of powder coke / anthracite, and the air permeability in the sintering process and the combustibility of powder coke / anthracite are improved. And the productivity of the sintering process,
The product yield and sinter quality were significantly improved, and NOx in the exhaust gas was significantly reduced.
図1は本発明の一例の工程図である 図2の(a)はマルメライザーの立面図、(b)はマル
メライザー内の粒子自転状況を示す図である。 図3(a)は粉コークスの粒度分布を示す実験結果、
(b)は無煙炭の粒度分布を示す実験結果である。 図4(a)は粉コークス造粒の鍋試験結果、(b)は無
煙炭造粒の鍋試験結果を示すグラフである 図5(a)は焼結過程の粉コークスの燃焼状況を示す
図、(b)は焼結過程の無煙炭の燃焼状況を示す図であ
る。 符号の説明 1は造粒コークス・造粒無煙炭、2は粉コークス・無煙
炭、3は焼結原料、4は1次ミキサー、5は2次ミキサ
ー、6は焼結機、7は遠心力を利用した造粒機、8は粒
子、9は回転円盤、10は壁面。FIG. 1 is a process diagram of an example of the present invention. FIG. 2A is an elevation view of a marumerizer, and FIG. 2B is a view showing a state of particle rotation in the marumerizer. FIG. 3 (a) is an experimental result showing the particle size distribution of coke powder,
(B) is an experimental result showing a particle size distribution of anthracite. FIG. 4A is a graph showing a pot test result of powder coke granulation, and FIG. 4B is a graph showing a pot test result of anthracite granulation. FIG. 5A is a diagram showing a combustion state of powder coke in a sintering process, (B) is a figure which shows the combustion condition of anthracite coal in a sintering process. Explanation of symbols 1 is granulated coke / granulated anthracite, 2 is powder coke / anthracite, 3 is a sintering raw material, 4 is a primary mixer, 5 is a secondary mixer, 6 is a sintering machine, and 7 is centrifugal force. Granulator, 8 is a particle, 9 is a rotating disk, and 10 is a wall surface.
Claims (11)
コークスまたは無煙炭を、含有水分が10〜28wt%
になるように水分調整しながら遠心力を利用した造粒機
を用いて50rpm以上しかもトータル回転数が100
〜700回転で造粒することを特徴とする粉コークス・
無煙炭の造粒方法。1. A powdered coke or anthracite having a particle size of 1.0 mm or less and 70 wt% or more, containing 10 to 28 wt% of water.
Use a granulator that utilizes centrifugal force while adjusting the water content so that the total rotation speed is 100 rpm or more.
Powder coke characterized by granulating at ~ 700 rpm
Granulation method of anthracite.
コークスまたは無煙炭に、生石灰を全体の1〜30wt
%添加し、含有水分が10〜28wt%になるように水
分調整しながら遠心力を利用した造粒機を用いて50r
pm以上しかも回転数が100〜700回転で造粒する
ことを特徴とする粉コークス・無煙炭の造粒方法。2. Powdered coke or anthracite having a particle size of 1.0 mm or less and 70 wt% or more, and 1 to 30 wt% of quicklime in the whole amount.
%, Using a granulator utilizing centrifugal force while adjusting the water content so that the water content is 10-28 wt%
A method for granulating coke powder or anthracite, which comprises granulating at a rotational speed of 100 to 700 rpm or more.
コークスまたは無煙炭に、T.Feが30wt%以上含
有する焼結原料を全体の10〜50wt%になるように
配合したのち、含有水分が10〜28wt%になるよう
に水分調整しながら遠心力を利用した造粒機を用いて5
0rpm以上しかもトータル回転数が100〜700回
転で造粒することを特徴とする粉コークス・無煙炭の造
粒方法。3. A powder coke or anthracite having a particle size of 1.0 mm or less and 70 wt% or more, and T. After blending the sintering raw material containing 30 wt% or more of Fe so as to be 10 to 50 wt% of the whole, a granulator using centrifugal force is used while adjusting the water content to be 10 to 28 wt%. 5
A method for granulating powder coke / anthracite, which comprises granulating at 0 rpm or more and a total number of revolutions of 100 to 700 revolutions.
コークスまたは無煙炭に、150〜400℃の熱風を粉
コークス表面に吹き付け、含有水分が10〜28wt%
になるように水分調整しながら遠心力を利用した造粒機
を用いて50rpm以上しかもトータル回転数が100
〜700回転で造粒することを特徴とする粉コークス・
無煙炭の造粒方法。4. A coke powder or anthracite powder having a particle size of 1.0 mm or less and 70 wt% or more is blown with hot air at 150 to 400 ° C. on the surface of the coke powder so that the water content is 10 to 28 wt%.
Use a granulator that utilizes centrifugal force while adjusting the water content so that the total rotation speed is 100 rpm or more.
Powder coke characterized by granulating at ~ 700 rpm
Granulation method of anthracite.
コークスまたは無煙炭を、含有水分が10〜28wt%
になるように水分調整しながら遠心力を利用した造粒機
を用いて50rpm以上しかもトータル回転数が100
〜700回転で造粒しながら、0.25〜3.0mmの
造粒粉が80wt%以上になるように調整してから、配
合原料全体の0.1〜5wt%になるように焼結原料に
混合し、そして配合原料全体を造粒したのち焼結するこ
とを特徴とする焼結鉱製造方法。5. A powdered coke or anthracite having a particle size of 1.0 mm or less and 70 wt% or more, containing 10 to 28 wt% of water.
Use a granulator that utilizes centrifugal force while adjusting the water content so that the total rotation speed is 100 rpm or more.
Adjust the granulated powder of 0.25 to 3.0 mm to be 80 wt% or more while granulating at ~ 700 rpm, and then sinter the raw material so as to be 0.1 to 5 wt% of the entire blended raw material. A method for producing a sinter, which comprises mixing the raw materials into a mixture, granulating the whole blended raw material, and then sintering.
コークスまたは無煙炭を、含有水分が10〜28wt%
になるように水分調整しながら遠心力を利用した造粒機
を用いて50rpm以上しかもトータル回転数が100
〜700回転で造粒しながら、0.25〜3.0mmの
造粒粉が80wt%以上になるように調整してから、配
合原料全体の0.1〜5wt%になるように焼結原料に
混合し、そして配合原料全体を造粒したのち焼結ベッド
の層高を700〜1000mmの高層厚に維持しながら
焼結することを特徴とする焼結鉱製造方法。6. A powdered coke or anthracite having a particle size of 1.0 mm or less and 70 wt% or more and a water content of 10 to 28 wt%.
Use a granulator that utilizes centrifugal force while adjusting the water content so that the total rotation speed is 100 rpm or more.
Adjust the granulated powder of 0.25 to 3.0 mm to be 80 wt% or more while granulating at ~ 700 rpm, and then sinter the raw material so as to be 0.1 to 5 wt% of the entire blended raw material. A method for producing sinter ore, characterized in that the whole of the mixed raw material is granulated, and then sintered while maintaining the bed height of the sintering bed at a high bed thickness of 700 to 1000 mm.
コークスまたは無煙炭を、含有水分が10〜28wt%
になるように水分調整しながら遠心力を利用した造粒機
を用いて50rpm以上しかもトータル回転数が100
〜700回転で造粒しながら、0.25〜3.0mmの
造粒粉が80wt%以上になるように調整してから配合
原料全体の0.1〜5wt%になるように焼結原料に混
合し、かつそれ以外に焼結原料に配合する粗粒粉コーク
スの3mm以上を20wt%以下に調整してから配合原
料全体を焼結することを特徴とする焼結鉱製造方法。7. A powdered coke or anthracite having a particle size of 1.0 mm or less and 70 wt% or more, containing 10 to 28 wt% of water.
Use a granulator that utilizes centrifugal force while adjusting the water content so that the total rotation speed is 100 rpm or more.
While granulating at ~ 700 rpm, adjust the granulated powder of 0.25 to 3.0 mm to 80 wt% or more, and then use as a sintering raw material so as to make 0.1 to 5 wt% of the entire blended raw material. A method for producing a sintered ore, which comprises mixing 3 mm or more of coarse grain coke mixed with a sintering raw material to 20 wt% or less and then sintering the entire raw material.
コークスまたは無煙炭に、生石灰を1〜30wt%添加
して、含有水分が10〜28wt%になるように水分調
整しながら遠心力を利用した造粒機を用いて50rpm
以上しかもトータル回転数が100〜700回転で造粒
しながら0.25〜3.0mmの造粒機が80wt%以
上になるように調整してから、配合原料全体の0.1〜
5wt%になるように焼結原料に混合し、そして配合原
料全体を造粒したのち焼結することを特徴とする焼結製
造方法。8. A centrifugal force while adding 1 to 30 wt% of quick lime to powder coke or anthracite having a particle size of 1.0 mm or less and 70 wt% or more to adjust the water content to 10 to 28 wt%. 50 rpm using the granulator used
Further, while adjusting the total number of revolutions to 100 wt.
A sintering manufacturing method characterized by mixing to a sintering raw material so as to be 5 wt%, granulating the whole compounded raw material, and then sintering.
コークスまたは無煙炭に、FeOが10wt%以上含有
する焼結原料を全体の10〜50wt%配合したのち、
含有水分が10〜28wt%になるように水分調整しな
がら遠心力を利用した造粒機を用いて50rpm以上し
かもトータル回転数が100〜700回転で造粒してか
ら、配合原料全体の0.1〜5wt%になるように焼結
原料に混合し、そして造粒したのち焼結することを特徴
とする焼結鉱製造方法。9. A coke powder or anthracite having a particle size of 1.0 mm or less and 70 wt% or more is mixed with 10 to 50 wt% of a sintering raw material containing 10 wt% or more of FeO, and
After adjusting the water content so that the water content is 10 to 28 wt%, a granulator utilizing centrifugal force is used to granulate at 50 rpm or more and at a total rotation speed of 100 to 700 rotations, and then to 0. A method for producing a sintered ore, which comprises mixing 1 to 5 wt% with a sintering raw material, granulating, and then sintering.
粉コークスまたは無煙炭に、150〜400℃の熱風を
粉コークス表面に吹き付け、含有水分が10〜28wt
%になるように水分調整しながら遠心力を利用した造粒
機を用いて50rpm以上しかもトータル回転数が10
0〜700回転で造粒してから、配合原料全体の0.1
〜5wt%になるように焼結原料に混合し、そして造粒
したのち焼結すことを特徴とする焼結鉱製造方法。10. A coke powder or anthracite having a particle size of 1.0 mm or less and 70 wt% or more is blown with hot air of 150 to 400 ° C. on the surface of the coke powder to contain water of 10 to 28 wt%.
Using a granulator that utilizes centrifugal force while adjusting the water content to be 50% or more, the total rotation speed is 10 rpm or more.
After granulating at 0 to 700 revolutions, 0.1
A method for producing a sintered ore, which comprises mixing to a sintering raw material so as to be ˜5 wt%, granulating and sintering.
粉コークスまたは無煙炭を、含有水分が10〜28wt
%になるように水分調整しながら遠心力を利用した造粒
機を用いて50rpm以上しかもトータル回転数が10
0〜700回転で造粒しながら、配合原料全体の0.1
〜5wt%になるように焼結原料に混合し、また副原料
として焼結原料に配合する石灰石の1mm以下を30%
以下にして混合し、そしてこれらの配合原料全体を造粒
したのち焼結することを特徴とする焼結鉱製造方法。11. A powdered coke or anthracite having a particle diameter of 1.0 mm or less and 70 wt% or more and a water content of 10 to 28 wt.
Using a granulator that utilizes centrifugal force while adjusting the water content to be 50% or more, the total rotation speed is 10 rpm or more.
While granulating from 0 to 700 revolutions, 0.1
30% of 1 mm or less of limestone to be mixed with the sintering raw material so as to be ˜5 wt% and to be mixed with the sintering raw material as an auxiliary raw material.
A method for producing a sintered ore, which comprises mixing as follows, and granulating the whole of these blended raw materials and then sintering.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP41828090A JPH0819485B2 (en) | 1990-08-10 | 1990-12-25 | Powder coke, anthracite granulation method and sinter production method |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP21018090 | 1990-08-10 | ||
JP2-210180 | 1990-08-10 | ||
JP41828090A JPH0819485B2 (en) | 1990-08-10 | 1990-12-25 | Powder coke, anthracite granulation method and sinter production method |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH04210433A JPH04210433A (en) | 1992-07-31 |
JPH0819485B2 true JPH0819485B2 (en) | 1996-02-28 |
Family
ID=26517902
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP41828090A Expired - Lifetime JPH0819485B2 (en) | 1990-08-10 | 1990-12-25 | Powder coke, anthracite granulation method and sinter production method |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0819485B2 (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100544465B1 (en) * | 2001-09-07 | 2006-01-24 | 주식회사 포스코 | A Method for Manufacturing Sinter |
JP6327082B2 (en) * | 2014-09-17 | 2018-05-23 | 新日鐵住金株式会社 | Pretreatment method for sintered aggregates |
CN104313313A (en) * | 2014-10-29 | 2015-01-28 | 攀钢集团攀枝花钢钒有限公司 | Preparation method for granulating fine-particle fuel for sintering of iron ore in advance |
JP6880951B2 (en) * | 2016-09-21 | 2021-06-02 | 日本製鉄株式会社 | Manufacturing method of coal-containing agglomerate and coal-containing agglomerate |
WO2023161742A1 (en) * | 2022-02-23 | 2023-08-31 | Tata Steel Limited | A method of granulating a mxture for iron-ore sintering |
-
1990
- 1990-12-25 JP JP41828090A patent/JPH0819485B2/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
JPH04210433A (en) | 1992-07-31 |
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