JPS59173229A - Pre-reducing baking method of pellet - Google Patents
Pre-reducing baking method of pelletInfo
- Publication number
- JPS59173229A JPS59173229A JP4752583A JP4752583A JPS59173229A JP S59173229 A JPS59173229 A JP S59173229A JP 4752583 A JP4752583 A JP 4752583A JP 4752583 A JP4752583 A JP 4752583A JP S59173229 A JPS59173229 A JP S59173229A
- Authority
- JP
- Japan
- Prior art keywords
- pellet
- chamber
- gas
- furnace
- pellets
- 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.)
- Granted
Links
- 239000008188 pellet Substances 0.000 title claims abstract description 49
- 238000000034 method Methods 0.000 title claims description 22
- 239000003209 petroleum derivative Substances 0.000 claims abstract description 21
- 239000011230 binding agent Substances 0.000 claims abstract description 16
- 238000004939 coking Methods 0.000 claims abstract description 16
- 238000001035 drying Methods 0.000 claims abstract description 13
- 239000007789 gas Substances 0.000 claims description 35
- 238000010304 firing Methods 0.000 claims description 15
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 8
- 229910052799 carbon Inorganic materials 0.000 claims description 8
- 238000002485 combustion reaction Methods 0.000 claims description 8
- 238000000197 pyrolysis Methods 0.000 claims description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 239000001301 oxygen Substances 0.000 claims description 3
- 229910052760 oxygen Inorganic materials 0.000 claims description 3
- 239000000571 coke Substances 0.000 claims description 2
- 239000007788 liquid Substances 0.000 claims description 2
- 239000002699 waste material Substances 0.000 claims description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 23
- 229910052742 iron Inorganic materials 0.000 abstract description 11
- 239000002184 metal Substances 0.000 abstract description 3
- 229910052751 metal Inorganic materials 0.000 abstract description 3
- 238000005979 thermal decomposition reaction Methods 0.000 abstract 1
- 229910000278 bentonite Inorganic materials 0.000 description 4
- 239000000440 bentonite Substances 0.000 description 4
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 4
- 239000003575 carbonaceous material Substances 0.000 description 3
- 239000001257 hydrogen Substances 0.000 description 3
- 229910052739 hydrogen Inorganic materials 0.000 description 3
- 239000002893 slag Substances 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- 239000003610 charcoal Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005469 granulation Methods 0.000 description 2
- 230000003179 granulation Effects 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 230000002940 repellent Effects 0.000 description 2
- 239000005871 repellent Substances 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- 241000208140 Acer Species 0.000 description 1
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 1
- 229910002090 carbon oxide Inorganic materials 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000012256 powdered iron Substances 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J6/00—Heat treatments such as Calcining; Fusing ; Pyrolysis
Landscapes
- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
Abstract
Description
【発明の詳細な説明】
〈産業上の利用分野〉
この発明は、石油残渣油を結合剤とした鉄鉱石ベレット
（石油残渣油ベレット）をロークリキルンあるいはシャ
フト炉などの還元炉に投入する前に、還元炉からの排ガ
スを熱源として移動グレート炉において予備還元および
予備焼成する方法に関するものである。[Detailed Description of the Invention] <Industrial Application Field> The present invention provides a method for reducing iron ore pellets using petroleum residue oil as a binder (petroleum residue oil pellets) before charging them into a reduction furnace such as a lorry kiln or a shaft furnace. This invention relates to a method for preliminary reduction and preliminary firing in a moving grate furnace using exhaust gas from a reduction furnace as a heat source.
〈従来技術〉
還元ペレット製造方法として、従来からシャフト炉方式
やロータリキルン法などが良く知られている。シャフト
炉の場合は、高いペレット強度が要求されるため、結合
剤としてベントナイトなど添加した酸化ペレットを使用
している。<Prior Art> As methods for producing reduced pellets, shaft furnace methods, rotary kiln methods, and the like have been well known. In the case of a shaft furnace, high pellet strength is required, so oxidized pellets to which bentonite or the like is added as a binder are used.
両方式とも鉄鉱石の結合剤としてはベントナイト等が用
いられているが、このベントナイトは電炉溶解の際、ス
ラグとなり溶解効率を低下せしめる要因となる。In both methods, bentonite or the like is used as a binder for iron ore, but this bentonite becomes slag during electric furnace melting and becomes a factor that reduces melting efficiency.
また、ロータリキルン法において、化ベレットを出発原
料とした場合、従来のベントナイト結合剤のペレットあ
るいは内炭型のペレットでは、還元炉での転動ｌこ耐え
るベレット強度（２５に？以上／ペレット）を得るため
には、移動クレート炉において１０００℃以上の焼成温
度が必要であった。In addition, in the rotary kiln method, when pellets are used as a starting material, pellets with a conventional bentonite binder or internal coal type pellets have a pellet strength that can withstand rolling in a reduction furnace (25? or more/pellet). In order to obtain this, a firing temperature of 1000° C. or higher was required in a moving crate furnace.
この予備焼成法に関する特許の一例として、炭材内装生
ペレットの予備焼成法＜＊公Ｆ８５６−５０５８０号公
報）のように、移動グレート炉においてベレットの水分
を除去した後、硬化帯において９５０℃以上、望ましく
は、１ｏｏｏ℃以上に加熱し、才だ、ガス組成（酸化度
）ｆｉ：調整することにより内装炭材（固体炭素）を消
費させたり、予備還元して生じた金属鉄を再酸化させて
ＦｅＱによる焼結など発生させる方法がある。As an example of a patent related to this pre-firing method, there is a method of pre-firing green pellets with carbonaceous material <*Publication F856-50580), in which water is removed from the pellets in a moving grate furnace, and then the temperature in the hardening zone is 950°C or higher. Preferably, the mixture is heated to 100° C. or higher, and the gas composition (oxidation degree) is adjusted to consume the internal carbonaceous material (solid carbon) or to reoxidize the metallic iron produced by preliminary reduction. There are methods to generate this, such as sintering using FeQ.
〈発明の目的〉
この発明は、このような事情に鑑みて提案されたもので
、その目的は、比較的低温で予備還元焼成を行なうこと
ができるとともに高強度のペレットを得ることのできる
予備還元焼成方法を提供することにある。<Object of the Invention> The present invention was proposed in view of the above circumstances, and its purpose is to provide a method for pre-reduction that can perform pre-reduction firing at a relatively low temperature and produce high-strength pellets. The purpose of the present invention is to provide a firing method.
〈発明の構成〉
この発明に係る予備還元焼成方法は、
乾燥室、コークス化室、硬化室からなる移動グレート炉
におけるペレットの予備還元焼成方法であって、ペレッ
トに、高揮発分を有する液体炭素源である石油残渣油を
結合剤とした石油残渣油ペレットを使用し、乾燥室を２
００〜５５０℃、コークス化室を５５０〜６５０”Ｃ１
硬化室を８５０〜９５０℃とし、前記ベレットを前記゛
乾燥室で乾燥させた後、前記コークス化室で結合剤であ
る石油残渣油を熱分解させてコークス化し、さらに、前
記硬化室において硬化させ、比較的低温で高強度のベレ
ット’Ｅ得るようにしたものである。<Structure of the Invention> The pre-reduction firing method according to the present invention is a method for pre-reducing and firing pellets in a moving grate furnace consisting of a drying chamber, a coking chamber, and a curing chamber, in which the pellets are coated with liquid carbon having a high volatile content. Using petroleum residue oil pellets with petroleum residue oil as a binder, the drying chamber is
00~550℃, coking chamber 550~650"C1
The curing chamber is set at 850 to 950° C., and the pellets are dried in the drying chamber, and then petroleum residue oil, which is a binder, is thermally decomposed to coke in the coking chamber, and further hardened in the curing chamber. , a high-strength pellet'E can be obtained at a relatively low temperature.
〈実施例〉
以下、この発明を図示する一実施例に基づいて説明する
。第１図に示すように、粉鉄鉱石Ｏが、造粒設備１にお
いて石油残渣油を結合剤として直径１０〜１５闘のベレ
ットＰｇに造粒される（これを生ペレットという）。<Example> The present invention will be described below based on an illustrative example. As shown in FIG. 1, powdered iron ore O is granulated into pellets Pg having a diameter of 10 to 15 mm in a granulation equipment 1 using petroleum residue oil as a binder (these are called raw pellets).
この生ベレン） Ｐｇは、移動グレート炉２の乾燥室２
Ａに供給され、層厚１００〜１５０闘の層で移動しなが
ら、２００〜５５０℃のガス（）Ｉにより乾燥される。This raw belen) Pg is the drying chamber 2 of the moving grate furnace 2.
A and dried with gas (2) I at 200-550° C. while moving in layers with a layer thickness of 100-150°C.
次に、乾燥したペレットは、コークス化室２Ｂに入り、
５５０〜６５０’ＣのガスＧ２によりコーキングされる
。ここでは、結合剤である石油残渣油が熱分解され、熱
分解ガスＧＩＩ（成分： ｌｌｉ、 ０２． Ｎ２．
Ｃｏ、 Ｃｏｔ、 ＯＨ４，０２Ｈ４、ＣｍＨｎ）を発
生し、コークス化することにより結合力が高くなる。さ
らに、この時発生する還元ガス（主にＨ２）によって予
備還元される。Next, the dried pellets enter the coking chamber 2B,
Coking is performed with gas G2 at 550-650'C. Here, petroleum residue oil, which is a binder, is pyrolyzed to produce pyrolysis gas GII (components: lli, 02.N2.
Co, Cot, OH4,02H4, CmHn) is generated and coked to increase the bonding strength. Furthermore, preliminary reduction is performed by the reducing gas (mainly H2) generated at this time.
続いて、コーキングされたベレットは、硬化室２０１こ
入り、９ＱＱ”Ｃ以上のガス山 により加熱され硬化さ
れる。ここでは、ベレットを８５０℃以上、望ましくは
、８７５℃以上に加熱すること番こよって、結合剤の炭
材が消費され、発生する還元ガス（Ｈ２およびＣＯガス
）によってベレットが還元され、鉄鉱石粒子表面に金楓
鉄が住じて金属結合が生じ、高強度のベレン） Ｐｃ、
となる（第２図参照）０また、ここで発生する還元ガス
には、石油残渣油の高温揮発分としての水素が金談れて
いるので、９００℃以下の低温でも容易に還元が進行し
、１０〜２０％という高い予備還元率となる。Next, the caulked pellet enters a curing chamber 201 and is heated and cured by a gas pile of 9QQ"C or higher. Here, the pellet is heated to 850°C or higher, preferably 875°C or higher. Therefore, the carbonaceous material of the binder is consumed, the pellet is reduced by the generated reducing gas (H2 and CO gas), and the gold maple iron resides on the surface of the iron ore particles to form a metallic bond, resulting in a high-strength pellet (Pc). ,
(See Figure 2) 0 Also, the reducing gas generated here contains hydrogen as a high-temperature volatile component of petroleum residue oil, so reduction can easily proceed even at low temperatures below 900°C. , resulting in a high preliminary return rate of 10-20%.
このように予備還元された石油残渣油ベレットＰｃ （
コーキングペレット）は、還元炉ｓ内での転勤に耐え得
る高い強度（圧潰強度：５０に９／Ｐ以上）を有し、還
元炉６において、同時に投入される外装還元剤（炭材）
により還元されて還元鉄となる。The petroleum residue oil pellet Pc (
The coking pellets) have high strength (crushing strength: 50 to 9/P or more) that can withstand transfer in the reduction furnace s, and the external reducing agent (charcoal material) is simultaneously introduced into the reduction furnace 6.
It is reduced to reduced iron.
コークス化室２Ｂで発生した熱分解ガスＧｌは、循環フ
ァン４によってリサイクルされ、還元炉３からの排ガス
Ｇ７ とともにガス燃焼炉５において空気を添加して
燃焼され、９００℃以上の熱ガスとなる。The pyrolysis gas Gl generated in the coking chamber 2B is recycled by the circulation fan 4, and is combusted together with the exhaust gas G7 from the reduction furnace 3 in the gas combustion furnace 5 with the addition of air, resulting in hot gas of 900° C. or higher.
この熱ガスの一部ａＳは、硬化室２Ｃへ供給され、一部
Ｇ２は、低温ガスＧ１ と混合されコークス化室２Ｂへ
供給される。硬化室２０の排ガスＧ６は、７００〜８０
０°Ｃの高温のため、撥熱ボイラ６によって熱回収され
た後、循環ファン７により乾燥室２人用の熱ガスＧ１
として利用される。才だ、乾燥室２Ａの排ガスＧ４は、
排ガス処理設備８へ送られる。A portion aS of this hot gas is supplied to the curing chamber 2C, and a portion G2 is mixed with the low temperature gas G1 and supplied to the coking chamber 2B. The exhaust gas G6 in the curing chamber 20 is 700 to 80
Due to the high temperature of 0°C, after the heat is recovered by the heat repellent boiler 6, the hot gas G1 for two people in the drying room is generated by the circulation fan 7.
used as. The exhaust gas G4 of the drying room 2A is
It is sent to the exhaust gas treatment facility 8.
このような循環システムにおいて、ガス燃焼炉５に導入
される空気値および補助バーナ９に′ より燃焼制御
することにより硬化室２Ｃに導入する熱ガスＧ３の温度
および酸素濃度を容易に制御することができる。ここで
、熱ガスＧ３の酸素濃度は３％以下とするのが、奸才し
い。In such a circulation system, the temperature and oxygen concentration of the hot gas G3 introduced into the curing chamber 2C can be easily controlled by controlling combustion based on the air value introduced into the gas combustion furnace 5 and the auxiliary burner 9. can. Here, it is wise to set the oxygen concentration of the hot gas G3 to 3% or less.
このような焼成方法においては、石油残渣油は、例えば
次のような成分であり、
・′全炭素 ：８２．９チ
ｊ コンラドソンカーボン ：２５．２チ、揮発分
ニア！１．９チ
１灰分 ：０．０８チ
第５図に示すように、従来の内装炭ベレット、ダストベ
レットに比較して比較的低温で高強度（ｙ） ”＜ Ｌ
／フット得ることができる。In such a firing method, the petroleum residue oil has, for example, the following components: Total carbon: 82.9 cm Conradson carbon: 25.2 cm, volatile content
near! 1.9chi 1 ash content: 0.08chi As shown in Figure 5, it has high strength (y) at a relatively low temperature compared to conventional internal charcoal pellets and dust pellets.
/ foot can be obtained.
〈発明の効果〉
前述のとおり、この発明によれば、石油残渣油ベレット
を使用することから次のような効果を奏する。<Effects of the Invention> As described above, according to the present invention, the following effects are achieved due to the use of petroleum residue oil pellets.
■ 熱分解ｌこより発生する熱分解ガスは、水素、−酸
化炭素および炭化水素からなる還元性ガスであり、５５
０〜６５０℃の低温でも予備還元が可能である。■ The pyrolysis gas generated from pyrolysis is a reducing gas consisting of hydrogen, carbon oxide and hydrocarbons, and has a
Preliminary reduction is possible even at low temperatures of 0 to 650°C.
■ 硬化室では石油残渣油中に含まれる高温揮発分が発
生し、それに含まれる水素によって還元が進行し、また
、残った固体炭素も加熱ガス中のＣｏｔや勃と反応して
ＣＯガスを発生し還元を進行させ、これにより高い予備
還元率を得ることができる〇
■ 鉄鉱石表面に金属鉄が発生し、鉄鉱石粒間が金属結
合重たは焼結を起こして強度の高いペレットとなる。■ In the curing chamber, high-temperature volatile matter contained in petroleum residue oil is generated, and reduction progresses with the hydrogen contained in it, and the remaining solid carbon also reacts with Cot and carbon in the heated gas to generate CO gas. 〇■ Metallic iron is generated on the surface of the iron ore, and metal bonding or sintering occurs between the iron ore grains, resulting in a high-strength pellet. .
■ 結合剤として灰分の少ない石油残渣油を使用してい
るために、ＡＪｚＯｓ 、 Ｂ１０ｚ 、 ＯａＯなど
のスラグ成分が少なく、かつ、大部分が揮発分である上
、残留カーホンの消費が容易なため金属ポンドが生じや
すい。コーキング・ペレットの残留カーボンは、約０．
１％と非常に低い。（結合剤のカーホンは１００チ近く
消費されている。）
■ 石油残渣油は、常温では固体に近く強粘性を有する
が、１５０℃以上に加熱すると流動化して鉄鉱石との接
触が非常に良くなる。■ Because petroleum residue oil with low ash content is used as a binder, there are few slag components such as AJzOs, B10z, OaO, etc., and most of the slag components are volatile, and residual carphone can be easily consumed, making it difficult to use metals. Pounds are likely to occur. The residual carbon in caulking pellets is approximately 0.
Very low at 1%. (Nearly 100 units of carphone, a binder, are consumed.) ■ Petroleum residue oil is almost solid and has strong viscosity at room temperature, but when heated to 150°C or higher, it becomes fluid and has excellent contact with iron ore. Become.
第１図は、この発明に係る予備還元焼成方法を実施する
ための装置を示す概略図、第２図は石油残渣油ベレット
の結合状況と圧潰強度を示すクラ７、第３図は同様のペ
レットの圧潰強度を従来ベレットと比較したクラ７であ
る。
１・・造粒設備、２・・移動クレート炉、２人 ・・乾
燥室、２Ｂ・・コークス化室、２Ｃ・・硬化室、３・・
還元炉、４・・循還ファン、５・・ガス燃焼炉、６・・
撥熱ボイラ、７・・循環ファン、８・・排カス処理設備
、９・・補助バーナ。Fig. 1 is a schematic diagram showing an apparatus for carrying out the preliminary reduction firing method according to the present invention, Fig. 2 shows the bonding state and crushing strength of petroleum residue pellets, and Fig. 3 shows similar pellets. The crushing strength of Kula 7 was compared with that of a conventional pellet. 1... Granulation equipment, 2... Mobile crate furnace, 2 people... Drying room, 2B... Coking room, 2C... Curing room, 3...
Reduction furnace, 4. Circulation fan, 5. Gas combustion furnace, 6.
Heat repellent boiler, 7. Circulation fan, 8. Exhaust waste treatment equipment, 9. Auxiliary burner.
Claims (5)
ート炉におけるペレットの予備還元焼成方法であって、
ペレットに、高揮発分を有する液体炭素源である石油残
渣油を結合剤とした石油残渣油ベレツ）％使用し、乾燥
室を２００〜３５０℃、コークス化室を５５０〜６５０
℃、硬化室を８５０〜９５０°Ｃとし、前記ベレン）ｆ
前記乾燥室で乾燥させた後、前記コークス化室で結合剤
である石油残渣油を熱分解させてコークス化し、さらに
、前記硬化室において硬化させることを特徴とするベレ
ットの予備還元焼成方法。(1) A method for pre-reduction firing of pellets in a moving crate furnace consisting of a drying chamber, a coking chamber, and a curing chamber,
For the pellets, petroleum residue oil, which is a liquid carbon source with a high volatile content, is used as a binder.
℃, the curing chamber was set to 850-950°C, and the temperature was
After drying in the drying chamber, petroleum residue oil as a binder is thermally decomposed to coke in the coking chamber, and further hardened in the curing chamber.
スを、還元炉からの排カスとともにカス燃焼炉で燃焼さ
せ、移動グレート炉に必要な高温カスを得ることを特徴
とする特許請求の範囲第１項記載のベレットの予備還元
焼成方法。(2) The pyrolysis residue of petroleum residue in the coking chamber is burned in a residue combustion furnace together with the waste residue from the reduction furnace to obtain high-temperature residue necessary for the moving grate furnace. The method for preliminary reduction firing of pellets according to item 1.
り高温ガスの温度およびガス組成を制御することを特徴
とする特許請求の範囲第２項記載のベレットの予備還元
焼成方法。(3) The pellet pre-reduction firing method according to claim 2, wherein the temperature and gas composition of the high-temperature gas are controlled by controlling combustion in a gas combustion furnace.
りを低温ガスと混合させてコークス化室へ導入すること
を特徴とする特許請求の範囲第６項記載のベレットの予
備還元焼成方法。(4) Preliminary reduction firing of pellets according to claim 6, characterized in that a part of the high-temperature gas from the gas combustion furnace is introduced into the curing chamber, and the rest is mixed with low-temperature gas and introduced into the coking chamber. Method.
下であることを特徴とする特許請求の範囲第４項記載の
ペレットの予備還元焼成方法。(5) The pellet pre-reduction firing method according to claim 4, wherein the oxygen concentration of the high temperature gas introduced into the curing chamber is 3% or less.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4752583A JPS59173229A (en) | 1983-03-22 | 1983-03-22 | Pre-reducing baking method of pellet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4752583A JPS59173229A (en) | 1983-03-22 | 1983-03-22 | Pre-reducing baking method of pellet |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59173229A true JPS59173229A (en) | 1984-10-01 |
| JPH0259203B2 JPH0259203B2 (en) | 1990-12-11 |
Family
ID=12777533
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4752583A Granted JPS59173229A (en) | 1983-03-22 | 1983-03-22 | Pre-reducing baking method of pellet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59173229A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010028932A1 (en) * | 2008-09-11 | 2010-03-18 | Siemens Vai Metals Technologies Gmbh & Co | Process for producing agglomerates of finely particulate iron carriers |
-
1983
- 1983-03-22 JP JP4752583A patent/JPS59173229A/en active Granted
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010028932A1 (en) * | 2008-09-11 | 2010-03-18 | Siemens Vai Metals Technologies Gmbh & Co | Process for producing agglomerates of finely particulate iron carriers |
| US8641799B2 (en) | 2008-09-11 | 2014-02-04 | Siemens Vai Metals Technologies Gmbh | Process for producing agglomerates of finely particulate iron carriers |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0259203B2 (en) | 1990-12-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20020005089A1 (en) | Method of and apparatus for manufacturing the metallic iron | |
| US3033673A (en) | Process of reducing iron oxides | |
| JP4191681B2 (en) | Hot metal production apparatus with improved operation of fluidized reduction furnace and hot metal production method | |
| CN115216574A (en) | Direct reduction process and direct reduction device for iron-containing composite pellets | |
| JPH11172312A (en) | Operation of movable hearth type furnace and movable hearth type furnace | |
| JP3043325B2 (en) | Method for producing reduced iron pellets and reduced iron pellets produced by this method | |
| EP2657320B1 (en) | Method for manufacturing partially carbonized coal briquettes | |
| JP6964692B2 (en) | Method of manufacturing metallic iron | |
| US3093474A (en) | Process of reducing metal oxides | |
| US3153586A (en) | Slag coated ore compacts and process for making the same | |
| JP2953938B2 (en) | Method for producing molded coke for metallurgy by low-temperature carbonization | |
| US3501288A (en) | Method of prereducing sinters and pellets | |
| JPS59173229A (en) | Pre-reducing baking method of pellet | |
| WO2012149668A1 (en) | Process for producing reduced iron powder in two steps | |
| US1447071A (en) | Process of agglomerating mixtures of fine ore and fuel in shaft furnaces | |
| JP2762913B2 (en) | Method for reducing agglomerates of fine iron ore with a solid reducing agent | |
| JPS648053B2 (en) | ||
| US3304168A (en) | System for producing carbonized and prereduced iron ore pellets | |
| JP4379083B2 (en) | Method for producing semi-reduced agglomerate | |
| JP3004255B2 (en) | Method for producing reduced iron | |
| JPH10251723A (en) | Production of reduced iron | |
| KR100398278B1 (en) | Method of reducing sinter with Low Oxidation Degree | |
| CN105441619B (en) | Combustion furnace and utilize its partial reduction iron method | |
| SU1640184A1 (en) | Method of producing metallized sinter | |
| JPH1161217A (en) | Production of reduced iron and device therefor |