JPH05230558A - Production of sintered ore - Google Patents
Production of sintered oreInfo
- Publication number
- JPH05230558A JPH05230558A JP6987392A JP6987392A JPH05230558A JP H05230558 A JPH05230558 A JP H05230558A JP 6987392 A JP6987392 A JP 6987392A JP 6987392 A JP6987392 A JP 6987392A JP H05230558 A JPH05230558 A JP H05230558A
- Authority
- JP
- Japan
- Prior art keywords
- sintering
- char
- carbonaceous material
- coke
- fuel
- 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.)
- Withdrawn
Links
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は，鉄鉱石を焼結して焼結
鉱を製造する際に，粉コークスに代わる燃料を使用して
焼結鉱を製造する方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a sinter by using a fuel instead of powder coke when producing a sinter by sintering iron ore.
【０００２】[0002]
【従来の技術】従来より, 鉄鉱石の焼結鉱を製造する際
の燃料として，粉コークスが使用されていた。粉コーク
スは，コークス炉で製造された粗コークスのうち，粒度
が小さくて高炉に装入できないものを篩分けたものであ
る。2. Description of the Related Art Conventionally, powdered coke has been used as a fuel for producing a sinter of iron ore. Dust coke is a coarse coke produced in a coke oven that is sieved to a particle size that is too small to be charged into the blast furnace.
【０００３】最近の高炉操業では微粉炭の吹き込み量
(ＰＣ比) が増大しており，これに伴って高炉装入用コ
ークスの使用量が低下する傾向にあり，採取できる粉コ
ークス量も低下気味となっている。The amount of pulverized coal blown in recent blast furnace operations
(PC ratio) is increasing, the amount of coke used for blast furnace charging tends to decrease, and the amount of powdered coke that can be collected is also decreasing.
【０００４】このため，焼結用の粉コークスが不足する
場合もあり，この場合には，高炉に装入できる塊コーク
スをわざわざ粉砕しなければならない事態となる。かよ
うな状況では，粉コークスの単価が上昇すると共に，高
炉操業におけるコークスの消費量を低減しようとする意
図を損ねることにもなる。For this reason, there is a case where the powder coke for sintering is insufficient, and in this case, it is necessary to pulverize the lump coke which can be charged into the blast furnace. In such a situation, the unit price of powder coke rises, and the intention to reduce the consumption of coke during blast furnace operation is impaired.
【０００５】焼結時のコークスの燃焼効率を向上させて
粉コークス使用量を低減すべく，例えば特開昭63-14933
3号公報および特開昭63-223133号公報には，鉄鉱石を含
む造粒物の表面にコークスを被覆する方法および焼結機
上の原料層表面にコークスを散布する方法が提案されて
いる。しかし，焼結燃料としての熱量を確保するに必要
な粉コークスの使用は不可避であるから，前述の問題を
抜本的に解決することはできない。In order to improve the combustion efficiency of coke during sintering and reduce the amount of coke powder used, for example, Japanese Patent Laid-Open No. 63-14933.
No. 3 and Japanese Patent Laid-Open No. 63-223133 propose a method of coating coke on the surface of a granulated material containing iron ore and a method of spraying coke on the surface of a raw material layer on a sintering machine. . However, since it is inevitable to use the powder coke necessary to secure the heat quantity as the sintered fuel, the above-mentioned problems cannot be fundamentally solved.
【０００６】かような事情のこともあり，粉コークスの
代替燃料として無煙炭が焼結用に使用されたりしてい
る。また，粉コークスの代替燃料としてタールやピッチ
を粉鉱石の造粒時に添加する方法が特開昭52-12740号公
報に提案されている。Under such circumstances, anthracite is used as an alternative fuel for powder coke for sintering. Further, Japanese Patent Laid-Open No. 52-12740 proposes a method of adding tar or pitch as an alternative fuel to powder coke during granulation of powder ore.
【０００７】[0007]
【発明が解決しようとする課題】鉄鉱石焼結用燃料に無
煙炭を配合し，その使用量を増加させると焼結鉱の生産
性が低下し且つ品質を悪化させる。このため無煙炭の使
用量にはおのずと制限があり，上記の問題を抜本的には
解決できなない。When anthracite coal is blended with the iron ore sintering fuel and the amount of its use is increased, the productivity of the sintered ore decreases and the quality deteriorates. Therefore, the amount of anthracite used is naturally limited, and the above problems cannot be fundamentally solved.
【０００８】また，粉コークスの代替燃料としてタール
やピッチを配合する方法では，焼結過程でタールやピッ
チ中の揮発分がガス化し，それが焼結原料層下部で再凝
縮して燃焼時の通気性を悪化させる原因となり，焼結鉱
の生産性が低下することは否めない。また該揮発分が焼
結排ガス中に混入し，集塵機の能力を劣化させることに
もなる。Further, in the method of mixing tar and pitch as an alternative fuel for powder coke, volatile components in tar and pitch are gasified during the sintering process, and they are re-condensed in the lower part of the sintering raw material layer and burned. It is undeniable that the productivity of sinter decreases, which causes deterioration of air permeability. Further, the volatile matter is mixed in the sintering exhaust gas, and the performance of the dust collector is deteriorated.
【０００９】さらに，粉コークスを使用する従来法では
粉コークスを使用する限り焼結工程で発生するＣＯ2は
削減できないという問題がある。Further, the conventional method using powder coke has a problem that CO 2 generated in the sintering step cannot be reduced as long as powder coke is used.
【００１０】[0010]
【課題を解決するための手段】本発明によれば，鉄鉱石
に副原料および燃料炭材を配合して焼成する鉄鉱石の焼
結法において，該燃料炭材の全部または一部として，石
炭を３００〜９００℃の温度範囲で熱分解して得たチヤ
ーを配合することを特徴とする焼結鉱の製造方法を提供
する。According to the present invention, in an iron ore sintering method in which an iron ore is mixed with an auxiliary raw material and a fuel carbonaceous material, and the mixture is fired, coal is used as all or part of the fuel carbonaceous material. The present invention provides a method for producing a sinter, which comprises blending a charge obtained by thermally decomposing the above in a temperature range of 300 to 900 ° C.
【００１１】[0011]
【作用】石炭を実質上非酸化性の雰囲気で３００℃以
上，９００℃以下の温度に加熱保持すると，石炭中の揮
発分はガス成分として急速に放出され，またタールも放
出される。すなわち，揮発分は炭化水素類，ＣＯ，Ｈ2
等のガス成分として固形分から除去されると共に，ター
ルも流出除去できる。このガス成分およびタールが放出
された固形分はチヤーと呼ばれる。When the coal is heated and maintained at a temperature of 300 ° C. or higher and 900 ° C. or lower in a substantially non-oxidizing atmosphere, the volatile matter in the coal is rapidly released as a gas component, and tar is also released. That is, volatile components are hydrocarbons, CO, H 2
As well as being removed from the solids as gas components such as, tar can also be removed by outflow. The solid content from which the gas component and tar are released is called a cha.
【００１２】このようにして得られるチヤーは堅牢なコ
ークスとは異なり，粉化性のある炭である。周知のよう
にコークスはコークス炉において１１００〜１２００℃
で乾留されたものであり，石炭粒子が相互に粘結して塊
状となったものであるが，該チヤーはかような粘結性を
示さず，また不要である。熱分解温度が３００℃未満で
はタール分の放出が十分ではない。一方この熱分解を起
こさせる温度としては９００℃まででよく，これ以上の
温度は不要である。The cheer thus obtained is charcoal having a pulverizing property, unlike the robust coke. As is well known, coke is 1100 to 1200 ° C. in a coke oven.
The carbon particles were carbonized in the above manner and coal particles were coagulated with each other to form a lump, but the chain does not show such cohesiveness and is unnecessary. If the thermal decomposition temperature is lower than 300 ° C, the tar content is not sufficiently released. On the other hand, the temperature for causing this thermal decomposition may be up to 900 ° C., and a temperature higher than this is unnecessary.
【００１３】石炭の熱分解処理は熱分解炉で行うことが
できる。熱分解炉としては，大気雰囲気と遮断された気
密な容器に構成し，熱分解に要する熱を供給すればよ
い。熱の供給手段は特に限定されるものではないが，非
酸化性の高温ガスや燃焼ガスを熱源として使用すること
ができる。The thermal decomposition treatment of coal can be performed in a thermal decomposition furnace. The pyrolysis furnace may be constructed in an airtight container that is shielded from the atmosphere and supplied with the heat required for pyrolysis. The means for supplying heat is not particularly limited, but non-oxidizing high temperature gas or combustion gas can be used as the heat source.
【００１４】熱分解によって生成したガスは炉内からガ
ス利用設備に供給することによって再利用ができ，ター
ル分は該ガスを冷却することによって分離できる。The gas generated by thermal decomposition can be reused by supplying it from the furnace to a gas utilization facility, and the tar content can be separated by cooling the gas.
【００１５】本発明では，このようにして得たチヤーを
焼結燃料炭材の全部または一部 (全燃料炭材の少なくと
も10重量％以上) として焼結原料に配合する。この配合
にあたっては，チヤーを粉体形状若しくは易粉化性のか
たまりのまま，鉄鉱石や副原料とともに造粒機に供給し
て, 混合・造粒することができる。造粒機として１次ミ
キサーと２次ミキサーが設置されている場合には，添加
するチャーの全量を１次ミキサーに供給してもよいが，
１次ミキサーと２次ミキサーにそれぞれ分割して供給し
てもよい。In the present invention, the cha thus obtained is mixed with the sintering raw material as a whole or a part of the sintered fuel carbonaceous material (at least 10% by weight or more of the total fuel carbonaceous material). In this compounding, the cheers can be mixed and granulated by supplying them to the granulator together with the iron ore and auxiliary raw materials in the form of powder or lumps that are easily pulverized. When a primary mixer and a secondary mixer are installed as granulators, the entire amount of char to be added may be supplied to the primary mixer,
It may be separately supplied to the primary mixer and the secondary mixer.
【００１６】また，ペレタイザーやミキサー等から排出
された鉄鉱石を含む造粒物の表面へ該チヤーを被覆させ
る方法でチヤーを添加してもよい。さらに，チヤーの一
部は焼結機上の点火炉の入り側の原料層表面へ散布する
こともできる。原料層表面へチヤーを散布する後者の場
合には，チヤーは粉コークスよりも着火性が良いので点
火炉燃料の削減にも寄与する。[0016] Further, the cheers may be added by a method of coating the surface of the granulated product containing iron ore discharged from a pelletizer, a mixer or the like with the cheers. Furthermore, part of the charge can be sprayed onto the surface of the raw material layer on the inlet side of the ignition furnace on the sintering machine. In the latter case, in which the charge is sprayed onto the surface of the raw material layer, the charge has a better ignitability than the coke dust, and therefore contributes to the reduction of the fuel for the ignition furnace.
【００１７】図１は，焼結過程での原料層内の状態を模
式的に示したものであり，チヤーを焼結燃料とした場合
の，パレット原料層の或る時点の温度分布を例示したも
のである。点火炉で原料層上部の燃料が着火され，次第
に燃焼帯は下方へさがってくるが，燃焼帯直下のか焼帯
では燃焼ガスによって原料や燃料が昇温される。図１の
チヤーを燃料とした場合の温度分布は粉コークスを燃料
とした場合と実質的に同様の挙動である。FIG. 1 schematically shows the state in the raw material layer during the sintering process, and exemplifies the temperature distribution of the pallet raw material layer at a certain point in the case where the fuel is used as the sintering fuel. It is a thing. The fuel in the upper part of the raw material layer is ignited in the ignition furnace, and the combustion zone gradually descends downward, but in the calcination zone immediately below the combustion zone, the raw material and fuel are heated by the combustion gas. The temperature distribution when the fuel in FIG. 1 is used as fuel is substantially the same as that when the powder coke is used as fuel.
【００１８】他方，燃料として無煙炭や一般炭等の石炭
を使用した場合では，か焼帯で石炭が昇温されるさいに
タールを放出することになり，そのタールは下層部の低
温の湿潤原料帯で再凝縮して原料層の空間を埋めてしま
い，通気性が悪化して焼結鉱の生産性が非常に低下する
ようになる。On the other hand, when coal such as anthracite or steam coal is used as the fuel, tar is released when the coal is heated in the calcination zone, and the tar is a low temperature wet raw material in the lower layer. It re-condenses in the zone and fills the space of the raw material layer, which deteriorates air permeability and greatly reduces the productivity of sinter.
【００１９】図２は，各種の熱分解温度のもとで石炭を
熱分解して得たチャーを，鉄鉱石や副原料に混合・造粒
して添加し，焼成した場合に，石炭の該熱分解温度と通
気性指数およびＣＯ2の発生量との関係を示したもので
ある。図２の結果に見られるように，熱分解温度が３０
０℃未満では, 焼成過程でタールを放出するために通気
性指数が低下する。熱分解温度が３００℃以上の場合に
得られたチャーでは，粉コークスとほぼ同様な燃焼挙動
を示すので，通気性指数の悪化はない。FIG. 2 shows that when char obtained by pyrolyzing coal under various pyrolysis temperatures is mixed and granulated with iron ore and an auxiliary raw material and added and fired, the char It shows the relationship between the thermal decomposition temperature and the gas permeability index and the amount of CO 2 generated. As can be seen from the results in Fig. 2, the thermal decomposition temperature is 30
Below 0 ° C, the air permeability index decreases because tar is released during the firing process. The char obtained when the thermal decomposition temperature is 300 ° C. or higher exhibits almost the same combustion behavior as powder coke, so that the air permeability index does not deteriorate.
【００２０】一方，図２から熱分解温度が高くなるほど
焼結時のＣＯ2発生量が増大することがわかる。これ
は，石炭を熱分解する場合, その熱分解温度が高くなる
ほど石炭からの水素の放出量が増大し，得られたチャー
の水素含有率が低下することに起因すると考えてよい。
特に熱分解温度が９００℃を超えるとＣＯ2発生量は高
い値を示す。したがって焼結機からのＣＯ2発生量を削
減するためには，熱分解温度が９００℃以下の条件で得
られたチャーを焼結用燃料とするのが効果的である。On the other hand, it can be seen from FIG. 2 that the higher the thermal decomposition temperature, the greater the amount of CO 2 generated during sintering. This can be attributed to the fact that when pyrolyzing coal, the higher the pyrolysis temperature, the greater the amount of hydrogen released from the coal and the lower the hydrogen content of the obtained char.
Especially when the thermal decomposition temperature exceeds 900 ° C., the CO 2 generation amount shows a high value. Therefore, in order to reduce the amount of CO 2 generated from the sintering machine, it is effective to use the char obtained under the condition that the thermal decomposition temperature is 900 ° C. or less as the sintering fuel.
【００２１】このように, 熱分解温度３００℃以上９０
０℃以下で石炭を熱分解して得られたチャーは焼結用燃
料として好適なものである。しかし高炉でのＰＣ比が増
大し粗コークスの使用量が低下したとは言えども少量の
粉コークスは発生するので，この粉コークスは該チャー
とともに焼結用燃料として使用できる。ただしチヤーの
使用割合〔（チヤー添加量）／（炭材の全添加量）〕が
0.1を下回るような場合には, 焼結機からのＣＯ2発生量
を削減できないし，また粉コークス使用量低減にも寄与
しないことになる。したがって本発明ではチヤーの全炭
材量に対する使用割合は10重量％以上とする。As described above, the thermal decomposition temperature is 300 ° C. or higher and 90
Char obtained by pyrolyzing coal at 0 ° C. or lower is suitable as a fuel for sintering. However, although the PC ratio in the blast furnace increased and the amount of crude coke used decreased, a small amount of powder coke was generated, and this powder coke can be used as a fuel for sintering together with the char. However, the usage rate of the cheers [(char addition amount) / (total amount of carbonaceous material)] is
If it is less than 0.1, the amount of CO 2 generated from the sintering machine cannot be reduced, and it will not contribute to the reduction of the amount of coke powder used. Therefore, in the present invention, the proportion of the total amount of charcoal used is 10% by weight or more.
【００２２】[0022]
【実施例】石炭を表１に示す各温度で熱分解してチヤー
を造り，これを表１に示す添加操作および添加量で焼結
原料に添加して, 30kg試験焼結鍋で焼結鉱を製造した。
焼結原料はいずれの例でも同一の鉄鉱石および副原料を
使用した。その主副原料の配合割合を表２に示した。焼
成過程での通気性指数（ＪＰＵ）および焼結機からのＣ
Ｏ2発生量を測定し，その結果を表１に併記した。な
お，比較のために，石炭の熱分解温度が低い比較例１，
チヤー添加量の少ない比較例２および粉コークスだけ添
加の比較例３の結果も表１に示した。[Example] Coal was pyrolyzed at each temperature shown in Table 1 to prepare a char, which was added to the sintering raw material by the addition operation and the addition amount shown in Table 1, and the sintered ore was put in a 30 kg test sintering pot. Was manufactured.
As the sintering raw material, the same iron ore and auxiliary raw materials were used in all examples. The mixing ratios of the main and auxiliary materials are shown in Table 2. Permeability index (JPU) during firing and C from sinter
The amount of O 2 generated was measured, and the results are also shown in Table 1. For comparison, Comparative Example 1 in which the thermal decomposition temperature of coal is low
Table 1 also shows the results of Comparative Example 2 in which a small amount of chae was added and Comparative Example 3 in which only powdered coke was added.
【００２３】[0023]
【表１】 [Table 1]
【００２４】[0024]
【表２】 [Table 2]
【００２５】表１の結果に見られるように，本発明に従
う実施例１〜５では，通気性指数の低下もなく，しかも
粉コークスのみを添加した場合（比較例３）に比べてＣ
Ｏ2発生量が約７〜９Nm3/T低減できた。比較例１では熱
分解温度が低いチヤーを添加したために通気性が悪化し
て通気性指数が低下した。チャーの添加割合が低い比較
例２では通気性指数の低下はなかったもののＣＯ2発生
量が増大した。As can be seen from the results in Table 1, in Examples 1 to 5 according to the present invention, there was no decrease in the air permeability index, and in comparison with the case where only powder coke was added (Comparative Example 3), C
The amount of O 2 generated could be reduced by about 7-9 Nm 3 / T. In Comparative Example 1, since the lower thermal decomposition temperature was added, the air permeability was deteriorated and the air permeability index was lowered. In Comparative Example 2 in which the proportion of char added was low, the air permeability index did not decrease, but the amount of CO 2 generated increased.
【００２６】[0026]
【発明の効果】本発明法を適用することにより, 高炉で
の高ＰＣ比操業にともなう焼結用燃料としての粉コーク
スの不足に対処でき，また粗コークスを粉砕するような
無駄も回避できるので粗コークスの消費量も削減でき
る。しかも, 本発明による焼結法では焼結機からのＣＯ
2発生量が削減でき，環境改善と地球温暖化の防止にも
寄与できる。EFFECTS OF THE INVENTION By applying the method of the present invention, it is possible to cope with the shortage of powder coke as a fuel for sintering accompanying the high PC ratio operation in the blast furnace, and it is possible to avoid waste such as crushing coarse coke. The consumption of coarse coke can also be reduced. Moreover, in the sintering method according to the present invention, CO
(2) The amount generated can be reduced, which can contribute to environmental improvement and prevention of global warming.
【図１】焼結過程での原料層内の状態並びに温度分布の
例を示す図である。FIG. 1 is a diagram showing an example of a state and temperature distribution in a raw material layer during a sintering process.
【図２】石炭の熱分解温度と，その熱分解で得られたチ
ヤーを焼結用燃料として鉄鉱石および副原料に混合・造
粒して配合したうえで焼成した場合の焼結時の通気性指
数とＣＯ2の発生量との関係を示した図である。[Fig. 2] Pyrolysis temperature of coal and aeration during sintering when the pyrolysis temperature and the char obtained by the pyrolysis are mixed and granulated with iron ore and an auxiliary raw material as a sintering fuel, and then mixed and fired. It is a figure showing the relation between a sex index and the amount of generation of CO 2 .
───────────────────────────────────────────────────── フロントページの続き (72)発明者 西本 義明 広島県呉市昭和町11番１号 日新製鋼株式 会社鉄鋼研究所内 (72)発明者 有富 暢一 広島県呉市昭和町11番１号 日新製鋼株式 会社鉄鋼研究所内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yoshiaki Nishimoto 11-1 Showa-cho, Kure-shi, Hiroshima Inside Steel Research Laboratory, Nisshin Steel Co., Ltd. (72) Inventor Nobuichi Aritomi 11-1 Showa-cho, Kure-shi, Hiroshima Nisshin Steel Co., Ltd.
Claims (5)
て焼成する鉄鉱石の焼結法において，該燃料炭材の全部
または一部として，石炭を３００〜９００℃の温度範囲
で熱分解して得たチヤーを配合することを特徴とする焼
結鉱の製造方法。1. A method of sintering an iron ore in which an iron ore is mixed with an auxiliary raw material and a fuel carbonaceous material and fired, wherein coal is heated in a temperature range of 300 to 900 ° C. as all or part of the fuel carbonaceous material. A method for producing a sinter, which comprises blending a chain obtained by decomposition.
量で配合される請求項１に記載の焼結鉱の製造方法。2. The method for producing a sintered ore according to claim 1, wherein the cha is blended in an amount of 10% by weight or more of the total fuel carbonaceous material.
合される請求項１または２に記載の焼結鉱の製造方法。3. The method for producing a sinter according to claim 1, wherein the cha is blended at the time of mixing and granulating the sintering raw materials.
覆される請求項１，２または３に記載の焼結鉱の製造方
法。4. The method for producing a sintered ore according to claim 1, wherein the chaier is coated on the surface of a granulated product of a sintering raw material.
された焼結原料の表面に散布される請求項１，２，３ま
たは４に記載の焼結鉱の製造方法。5. The method for producing a sinter according to claim 1, 2, 3, or 4, wherein a part of the compounding agent is dispersed on the surface of the sintering raw material loaded in the sintering machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6987392A JPH05230558A (en) | 1992-02-19 | 1992-02-19 | Production of sintered ore |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6987392A JPH05230558A (en) | 1992-02-19 | 1992-02-19 | Production of sintered ore |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH05230558A true JPH05230558A (en) | 1993-09-07 |
Family
ID=13415343
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6987392A Withdrawn JPH05230558A (en) | 1992-02-19 | 1992-02-19 | Production of sintered ore |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH05230558A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100518761B1 (en) * | 2000-12-27 | 2005-10-06 | 주식회사 포스코 | Manufacturing Method of the Sintered Ore |
| JP2009298909A (en) * | 2008-06-12 | 2009-12-24 | Nippon Steel Engineering Co Ltd | Utilizing method of pyrolysis char as carbonaceous material for sintering |
| WO2010106756A1 (en) * | 2009-03-16 | 2010-09-23 | 新日本製鐵株式会社 | Process for producing sintered ore |
| JP2010254929A (en) * | 2009-04-28 | 2010-11-11 | Nippon Steel Corp | Process for producing setting material for manufacture of sintered ore |
| JP4681688B2 (en) * | 2009-02-02 | 2011-05-11 | 新日本製鐵株式会社 | Iron ore sintering carbon |
| CN103710037A (en) * | 2013-12-20 | 2014-04-09 | 清华大学 | Fluidized-bed low-rank coal upgrading utilization system and method |
| JP2020186436A (en) * | 2019-05-14 | 2020-11-19 | 日本製鉄株式会社 | Manufacturing method of sintered ore |
-
1992
- 1992-02-19 JP JP6987392A patent/JPH05230558A/en not_active Withdrawn
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100518761B1 (en) * | 2000-12-27 | 2005-10-06 | 주식회사 포스코 | Manufacturing Method of the Sintered Ore |
| JP2009298909A (en) * | 2008-06-12 | 2009-12-24 | Nippon Steel Engineering Co Ltd | Utilizing method of pyrolysis char as carbonaceous material for sintering |
| JP4681688B2 (en) * | 2009-02-02 | 2011-05-11 | 新日本製鐵株式会社 | Iron ore sintering carbon |
| WO2010106756A1 (en) * | 2009-03-16 | 2010-09-23 | 新日本製鐵株式会社 | Process for producing sintered ore |
| JP4837799B2 (en) * | 2009-03-16 | 2011-12-14 | 新日本製鐵株式会社 | Method for producing sintered ore |
| KR101409516B1 (en) * | 2009-03-16 | 2014-06-19 | 신닛테츠스미킨 카부시키카이샤 | Process for producing sintered ore |
| JP2010254929A (en) * | 2009-04-28 | 2010-11-11 | Nippon Steel Corp | Process for producing setting material for manufacture of sintered ore |
| CN103710037A (en) * | 2013-12-20 | 2014-04-09 | 清华大学 | Fluidized-bed low-rank coal upgrading utilization system and method |
| JP2020186436A (en) * | 2019-05-14 | 2020-11-19 | 日本製鉄株式会社 | Manufacturing method of sintered ore |
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| Date | Code | Title | Description |
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| A300 | Withdrawal of application because of no request for examination |
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