JPH07268496A - Charging method of floorpavement and floorpavement hopper - Google Patents
Charging method of floorpavement and floorpavement hopperInfo
- Publication number
- JPH07268496A JPH07268496A JP7918394A JP7918394A JPH07268496A JP H07268496 A JPH07268496 A JP H07268496A JP 7918394 A JP7918394 A JP 7918394A JP 7918394 A JP7918394 A JP 7918394A JP H07268496 A JPH07268496 A JP H07268496A
- Authority
- JP
- Japan
- Prior art keywords
- pallet
- sintering
- side wall
- hopper
- bedding
- 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- Withdrawn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
Landscapes
- Manufacture And Refinement Of Metals (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、高炉等で溶銑製造の原
料となる焼結鉱を製造する際の焼結パレットへの床敷の
装入方法および床敷ホッパーに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of charging bedding to a sinter pallet and a bedding hopper when a sinter is used as a raw material for producing hot metal in a blast furnace or the like.
【０００２】[0002]
【従来の技術】従来の焼結鉱製造工程を図４に示す。従
来は、５ｍｍ以上の製品焼結鉱から通常１５〜２０ｍｍ
の焼結鉱を篩分け、これを床敷５とし、床敷ホッパー４
からパレット８の火格子上に３０ｍｍの厚みに装入し、
焼結鉱主原料の鉄鉱石、副原料の石灰石、燃料のコーク
ス、および返鉱を調湿、造粒した焼結原料１をサージホ
ッパー２に搬送して貯蔵した後、シュート３を介してパ
レット８の床敷５の上に装入し、原料充填層６を形成し
ていた。鉄鉱石を主原料とする焼結鉱の場合、原料充填
層６の厚さは通常６００ｍｍである。その後、原料充填
層６の表層コークスに点火炉７で点火し、下方に空気を
吸引しながらコークスを燃焼させ、この燃焼熱で上層か
ら下層にかけて順次原料を焼結する。2. Description of the Related Art A conventional sinter production process is shown in FIG. Conventionally, from product sinter of 5 mm or more, usually 15 to 20 mm
The sinter of No. 4 is screened, and this is used as the bedding 5 and the bedding hopper 4
From the pallet 8 on the grate to a thickness of 30mm,
Sintered ore Main raw material iron ore, auxiliary raw material limestone, fuel coke, and return ore were conditioned and granulated, and the sintered raw material 1 was conveyed to a surge hopper 2 and stored, and then palletized through a chute 3. 8 was placed on the bedding 5 to form the raw material filling layer 6. In the case of a sintered ore containing iron ore as a main raw material, the raw material filling layer 6 usually has a thickness of 600 mm. After that, the surface coke of the raw material packed bed 6 is ignited in the ignition furnace 7 to burn the coke while sucking air downward, and the raw material is sequentially sintered from the upper layer to the lower layer by the heat of combustion.
【０００３】上記従来法において、たとえば特開昭５１
−８６７０２号公報には、パレット側壁に近い原料充填
層を加圧ローラで圧縮し、原料充填層の嵩密度を高くし
てパレット幅方向の通気を均一化し、パレット幅方向の
焼結を均一化する方法が、また特開昭５７−２９７３号
公報には、パレット側壁に近い原料充填層に振動体を挿
入し、原料充填層の嵩密度を高くしてパレット幅方向の
通気を均一化し、パレット幅方向の焼結を均一化する方
法が記載されている。In the above-mentioned conventional method, for example, JP-A-51 is used.
In Japanese Patent Publication No. 86702, a raw material filling layer near the side wall of the pallet is compressed by a pressure roller to increase the bulk density of the raw material filling layer to make the ventilation in the pallet width direction uniform and the sintering in the pallet width direction uniform. In Japanese Patent Laid-Open No. 57-2973, a vibrator is inserted in the raw material filling layer near the side wall of the pallet to increase the bulk density of the raw material filling layer to make the ventilation in the width direction of the pallet uniform. A method for homogenizing widthwise sintering is described.
【０００４】[0004]
【発明が解決しようとする課題】従来法では、パレット
幅方向の通気がパレット側壁に近いほど大きくなる分布
を示す。このためパレット側壁に近いほど焼結が加速さ
れ、図５に示したようにパレット側壁８ａに近い焼結層
の焼結速度がパレット幅方向中央部より速くなり、パレ
ット側壁８ａに近い部分は焼結が完了してシンターケー
キ６ｃが全層に渡ってできる。このシンターケーキ６ｃ
の部分はパレット幅方向中央部の焼結層６ｂより通気抵
抗が小さいため、選択的にパレット側壁のシンターケー
キ６ｃの部分に空気が吸引され、パレット幅方向中央部
の焼結の進行が極端に遅くなり、このため中央部の原料
層６ａがいつまでも残存し、焼結時間が大幅に長くな
り、大幅な生産性の低下を来す。これに対して特開昭５
１−８６７０２号公報あるいは特開昭５７−２９７３号
公報記載の方法ではパレット幅方向の焼結速度を均一に
するには限界があり、十分解決されているとは言えな
い。本発明は、パレット幅方向の焼結速度を均一化し、
焼結時間を短縮し、生産性を向上することを目的とす
る。In the conventional method, there is a distribution in which the ventilation in the pallet width direction becomes larger as it approaches the pallet side wall. Therefore, the closer to the side wall of the pallet, the faster the sintering becomes, and as shown in FIG. 5, the sintering speed of the sintered layer near the side wall 8a of the pallet becomes higher than that of the central portion in the width direction of the pallet, and the portion near the side wall 8a of the pallet is burned. When the binding is completed, the sinter cake 6c is formed on all layers. This sinter cake 6c
Since air permeability resistance is smaller in the portion of the pallet width direction than in the center portion of the pallet width direction, air is selectively sucked into the sinter cake 6c portion of the pallet side wall, and the progress of sintering in the center portion of the pallet width direction is extremely advanced. Therefore, the raw material layer 6a in the central portion remains indefinitely, the sintering time is significantly lengthened, and the productivity is significantly reduced. On the other hand, JP-A-5
The method described in JP-A No. 1-86702 or JP-A No. 57-2973 has a limit in making the sintering rate in the pallet width direction uniform and cannot be said to be sufficiently solved. The present invention makes the sintering rate in the pallet width direction uniform,
The purpose is to shorten the sintering time and improve the productivity.
【０００５】[0005]
【課題を解決するための手段】本発明の床敷の装入方法
は、下方吸引式焼結機の焼結パレットの底面に床敷を装
入する際、パレット側壁部床敷層厚が３〜５０ｍｍ、パ
レット中央部床敷層厚が２０〜１００ｍｍとなるように
床敷を装入することを特徴とする床敷の装入方法であ
り、本発明の床敷ホッパーは、床敷ホッパーのパレット
側壁部の切り出し口をパレット中央部の切り出し口より
１７〜７７ｍｍ低くしたことを特徴とする床敷ホッパー
である。なお、ここでパレット側壁部とは、パレット側
壁内側からパレット中央に向かって２５％以内の範囲で
あり、パレット両側壁部はパレット全幅の５０％以下の
範囲である。したがってパレット側壁部床敷幅１１ｂは
パレット側壁内側から２５％以内の範囲となる。またパ
レット中央部とは、パレット両側壁部の５０％を除いた
残りの範囲である。According to the method for charging bedding of the present invention, when the bedding is charged on the bottom surface of the sintering pallet of the lower suction type sintering machine, the pallet side wall portion has a bedding thickness of 3 The floor bedding method is characterized in that the floor bedding is loaded so that the bedding floor layer thickness of the pallet central part is 20 mm to 50 mm, and the floor hopper of the present invention is the floor hopper of the floor hopper. The floor hopper is characterized in that the cutout opening of the side wall of the pallet is 17 to 77 mm lower than the cutout opening of the center of the pallet. Here, the pallet side wall portion is within a range of 25% from the inside of the pallet side wall toward the center of the pallet, and both side wall portions of the pallet are within a range of 50% or less of the entire width of the pallet. Therefore, the pallet side wall part bedding width 11b is within 25% from the inside of the pallet side wall. Further, the pallet central portion is the remaining range excluding 50% of both side wall portions of the pallet.
【０００６】[0006]
【作用】図３に示すように、パレット側壁部床敷層厚１
１ａをパレット中央部床敷層厚１２ａより薄くして床敷
を装入すると、パレット側壁部床敷１１の層厚が薄いた
めパレット側壁部の焼結層は通気が阻害され、パレット
中央部の焼結層の通気と同じ水準になり、パレット幅方
向の通気量が等しくなる。したがってパレット幅方向の
焼結速度が等しくなり、焼結層６ｂはパレット幅方向に
おいて下層まで等しくなり、焼結の停滞部がなくなるた
め焼結時間が短縮し、生産性が向上する。また焼結時間
が均一化するため、製品の品質も全体に良質化する。Operation: As shown in FIG. 3, the pallet side wall floor bedding layer thickness 1
When 1a is made thinner than the pallet center part bedding layer thickness 12a and the bedding is loaded, since the layer thickness of the pallet side wall part bedding 11 is thin, ventilation of the sintered layer on the pallet side wall part is obstructed and the pallet center part The ventilation level is the same as that of the sintered layer, and the ventilation amount in the pallet width direction is equal. Therefore, the sintering speed in the pallet width direction becomes the same, the sintering layer 6b becomes even in the lower layer in the pallet width direction, and the stagnation part of the sintering is eliminated, so that the sintering time is shortened and the productivity is improved. Further, since the sintering time is made uniform, the quality of the product is improved as a whole.
【０００７】パレット側壁部床敷層厚１１ａは３〜５０
ｍｍ、パレット中央部床敷層厚１２ａは２０〜１００ｍ
ｍの範囲とする。パレット側壁部床敷層厚１１ａを３ｍ
ｍ未満にするには床敷を小さくする必要があり、パレッ
トの火格子の隙間から落下する量が多くなり、また５０
ｍｍを超える厚みになるとパレット中央部との差が取れ
にくくなるためである。一方、パレット中央部床敷層厚
１２ａが２０ｍｍ未満になるとパレット側壁部との差が
取れにくくなり、また１００ｍｍを超える厚みになると
量の確保に困難を来すためである。The pallet side wall floor bedding thickness 11a is 3 to 50.
mm, pallet center part bedding layer thickness 12a is 20 to 100 m
The range is m. Pallet side wall bedding layer thickness 11a is 3m
In order to make it less than m, it is necessary to make the bedding small, and the amount dropped from the gap of the grate of the pallet increases.
This is because it becomes difficult to make a difference from the center of the pallet when the thickness exceeds mm. On the other hand, if the pallet center part bedding layer thickness 12a is less than 20 mm, it becomes difficult to make a difference with the pallet side wall part, and if it exceeds 100 mm, it becomes difficult to secure the amount.
【０００８】図２に示すように、床敷ホッパー４の幅方
向の切り出し口は、パレット側壁部床敷層厚１１ａを３
〜５０ｍｍ、パレット中央部床敷層厚１２ａを２０〜１
００ｍｍの範囲にするように高さを設定する必要があ
り、パレット側壁部の切り出し口をパレット中央部の切
り出し口より１７〜７７ｍｍ低くする。As shown in FIG. 2, the cutout in the width direction of the bedding hopper 4 has a pallet side wall portion bedding layer thickness 11a of 3
~ 50 mm, pallet center part bedding layer thickness 12a 20 ~ 1
It is necessary to set the height so that it falls within the range of 00 mm, and the cutout opening in the side wall of the pallet is 17 to 77 mm lower than the cutout opening in the center of the pallet.
【０００９】パレット幅方向の焼結速度は排出部の焼結
最下層の断面赤熱層により判定し、パレット側壁部の赤
熱層がパレット中央部より高い位置にあれば、パレット
側壁部の焼結進行が遅いと判断し、パレット側壁部床敷
層厚１１ａをパレット中央部床敷層厚１２ａよりさらに
厚くして焼結の進行を均一化する。また、パレット側壁
部の赤熱層がパレット中央部より低い位置にあれば、パ
レット側壁部の焼結進行が速いと判断し、パレット側壁
部床敷層厚１１ａをパレット中央部床敷層厚１２ａより
さらに薄くして焼結の進行を均一化する。The sintering speed in the pallet width direction is judged by the cross-section red heat layer of the lowermost layer of the sinter in the discharge part. If the red heat layer of the pallet side wall is higher than the center of the pallet, the pallet side wall sintering progresses. Is determined to be slow, the pallet side wall part bedding layer thickness 11a is made thicker than the pallet center part bedding layer thickness 12a, and the progress of sintering is made uniform. If the red-hot layer on the side wall of the pallet is located lower than the center of the pallet, it is determined that the pallet side wall has a faster sintering rate, and the pallet side wall bed thickness 11a is more than the pallet center bed thickness 12a. It is further thinned to make the progress of sintering uniform.
【００１０】[0010]
【実施例１】幅４ｍのパレット８を用い、図２に示すよ
うに、床敷ホッパー４のホッパー切り出し口１３のパレ
ット側壁部ホッパー切り出し口高さ１４は１５ｍｍ、パ
レット中央部ホッパー切り出し口高さ１５は４０ｍｍと
した。また、パレット側壁部はパレット側壁内側からパ
レット中央に向かって１５％の０．６ｍとした。したが
って、パレット中央部はパレット両側壁部の３０％を除
いた７０％の２．８ｍの範囲である。[Embodiment 1] Using a pallet 8 having a width of 4 m, as shown in FIG. 2, the pallet side wall hopper cutout height 14 of the hopper cutout 13 of the floor hopper 4 is 15 mm, and the hopper cutout height at the center of the pallet is 15. 15 was 40 mm. In addition, the pallet side wall portion was set at 15% from the inside of the pallet side wall toward the center of the pallet, and was 0.6 m. Therefore, the central part of the pallet is 70% excluding 30% of both side wall parts of the pallet, and is within the range of 2.8 m.
【００１１】図１に示すように、床敷ホッパー４から粒
径３〜１０ｍｍの鉄鉱石を床敷として装入すると、図３
に示したようにパレット側壁部床敷層厚１１ａはパレッ
ト側壁部ホッパー切り出し口高さ１４と同じ１５ｍｍ、
パレット中央部床敷層厚１２ａはパレット中央部ホッパ
ー切り出し口高さ１５と同じ４０ｍｍとなり、パレット
側壁部床敷１１とパレット中央部床敷１２として配置さ
れた。As shown in FIG. 1, when iron ore having a particle size of 3 to 10 mm is charged from the bedding hopper 4 as the bedding,
As shown in, the pallet side wall portion bedding layer thickness 11a is 15 mm, which is the same as the pallet side wall portion hopper cutout height 14 mm,
The pallet center part bedding layer thickness 12a was 40 mm, which was the same as the pallet center part hopper cutout height 15, and the pallet side wall part bedding 11 and the pallet center part bedding 12 were arranged.
【００１２】図４に示す従来の焼結鉱製造工程により、
パレット８上の６００ｍｍ層厚の原料充填層６の表層部
分のコークスに点火炉７で点火した。パレット側壁部は
パレット中央部より床敷が薄いため、パレット側壁部の
焼結層は通気が阻害され、パレット中央部の焼結層の通
気と同じ水準になり、パレット幅方向の通気量は等しく
なった。そのため、図３に示したようにパレット幅方向
の焼結速度は下層まで等しくなり、焼結の停滞部がなく
なった。このため焼結時間が短縮し、生産性は従来方法
の２９．５ｔ／Ｄ／ｍ2 より５．５ｔ／Ｄ／ｍ2 高い３
５．０ｔ／Ｄ／ｍ2 に向上した。According to the conventional sinter production process shown in FIG. 4,
The coke in the surface layer portion of the raw material packed layer 6 having a thickness of 600 mm on the pallet 8 was ignited in the ignition furnace 7. Since the floor of the pallet side wall is thinner than the center of the pallet, the ventilation of the sinter layer of the pallet side wall is obstructed, which is the same level as the ventilation of the sinter layer of the pallet center, and the ventilation amount in the pallet width direction is equal. became. Therefore, as shown in FIG. 3, the sintering speed in the pallet width direction was equal to the lower layer, and the stagnation part of sintering disappeared. Therefore, the sintering time is shortened, and the productivity is 5.5 t / D / m 2 higher than the conventional method of 29.5 t / D / m 2.
It was improved to 5.0 t / D / m 2 .
【００１３】[0013]
【実施例２】幅５ｍのパレット８を用い、図２に示すよ
うに、床敷ホッパー４のホッパー切り出し口１３のパレ
ット側壁部ホッパー切り出し口高さ１４は２０ｍｍ、パ
レット中央部ホッパー切り出し口高さ１５は５０ｍｍと
した。また、パレット側壁部はパレット側壁内側からパ
レット中央に向かって２５％の１．２５ｍとした。した
がって、パレット中央部はパレット両側壁部の５０％を
除いた５０％の２．５ｍの範囲である。Example 2 Using a pallet 8 having a width of 5 m, as shown in FIG. 2, the pallet side wall hopper cutout height 14 of the hopper cutout 13 of the floor hopper 4 is 20 mm, and the pallet center hopper cutout height is 20 mm. 15 was 50 mm. In addition, the pallet side wall portion was 25% toward the center of the pallet from the inside of the pallet side wall to 1.25 m. Therefore, the central portion of the pallet is 50% excluding 50% of both side wall portions of the pallet and is within a range of 2.5 m.
【００１４】図１に示すように、床敷ホッパー４から粒
径１０〜２０ｍｍの焼結鉱を床敷として装入すると、図
３に示したようにパレット側壁部床敷層厚１１ａはパレ
ット側壁部ホッパー切り出し口高さ１４と同じ２０ｍ
ｍ、パレット中央部床敷層厚１２ａはパレット中央部ホ
ッパー切り出し口高さ１５と同じ５０ｍｍとなり、パレ
ット側壁部床敷１１とパレット中央部床敷１２として配
置された。As shown in FIG. 1, when a sinter having a particle size of 10 to 20 mm is charged as a bedding from the bedding hopper 4, as shown in FIG. 20m, which is the same as the height of the cut-out part 14
m, the pallet center part bedding layer thickness 12a was 50 mm, which was the same as the pallet center part hopper cutout opening height 15, and the pallet side wall part bedding 11 and the pallet center part bedding 12 were arranged.
【００１５】図４に示す従来の焼結鉱製造工程により、
パレット８上の６００ｍｍ層厚の原料充填層６の表層部
分のコークスに点火炉７で点火した。パレット側壁部は
パレット中央部より床敷が薄いため、パレット側壁部の
焼結層は通気が阻害され、パレット中央部の焼結層の通
気と同じ水準になり、パレット幅方向の通気量は等しく
なった。そのため、図３に示したようにパレット幅方向
の焼結速度は下層まで等しくなり、焼結の停滞部がなく
なった。このため焼結時間が短縮し、生産性は従来方法
の２９．５ｔ／Ｄ／ｍ2 より５．８ｔ／Ｄｍ2 高い３
５．３ｔ／Ｄ／ｍ2 に向上した。According to the conventional sinter production process shown in FIG. 4,
The coke in the surface layer portion of the raw material packed layer 6 having a thickness of 600 mm on the pallet 8 was ignited in the ignition furnace 7. Since the floor of the pallet side wall is thinner than the center of the pallet, the ventilation of the sinter layer of the pallet side wall is obstructed, which is the same level as the ventilation of the sinter layer of the pallet center, and the ventilation amount in the pallet width direction is equal. became. Therefore, as shown in FIG. 3, the sintering speed in the pallet width direction was equal to the lower layer, and the stagnation part of sintering disappeared. Therefore, the sintering time is shortened, and the productivity is 5.8 t / Dm 2 higher than the conventional method of 29.5 t / D / m 2.
It was improved to 5.3 t / D / m 2 .
【００１６】[0016]
【発明の効果】本発明によれば焼結がパレット幅方向で
均一に速くなるため、生産性が従来法に比較して向上す
る。EFFECTS OF THE INVENTION According to the present invention, since the sintering speed is uniformly increased in the width direction of the pallet, the productivity is improved as compared with the conventional method.
【図１】本発明の床敷ホッパーを示す図である。FIG. 1 is a diagram showing a bedding hopper of the present invention.
【図２】本発明の床敷ホッパーを示す図である。FIG. 2 is a diagram showing a bedding hopper of the present invention.
【図３】本発明法により床敷を装入した場合の焼結進行
状況を示す図である。FIG. 3 is a diagram showing the progress of sintering when a bedding is charged by the method of the present invention.
【図４】従来の焼結鉱製造工程を示す図である。FIG. 4 is a diagram showing a conventional sinter production process.
【図５】従来法により床敷を装入した場合の焼結進行状
況を示す図である。FIG. 5 is a diagram showing the progress of sintering when a bedding is loaded by a conventional method.
１ 焼結原料 ２ サージホッパー ３ シュート ４ 床敷ホッパー ５ 床敷 ６ 原料充填層 ６ａ 原料層 ６ｂ 焼結層 ６ｃ シンターケーキ ７ 点火炉 ８ パレット ８ａ パレット側壁 ９ 火格子 ９ａ 火格子面 １１ パレット側壁部床敷 １１ａ パレット側壁部床敷層厚 １１ｂ パレット側壁部床敷幅 １２ パレット中央部床敷 １２ａ パレット中央部床敷層厚 １２ｂ パレット中央部床敷幅 １３ ホッパー切り出し口 １４ パレット側壁部ホッパー切り出し口高さ １４ａ パレット側壁部ホッパー切り出し口幅 １５ パレット中央部ホッパー切り出し口高さ １５ａ パレット中央部ホッパー切り出し口幅 1 Sintering Raw Material 2 Surge Hopper 3 Chute 4 Flooring Hopper 5 Flooring 6 Raw Material Packing Layer 6a Raw Material Layer 6b Sintering Layer 6c Sinter Cake 7 Ignition Furnace 8 Pallet 8a Pallet Side Wall 9 Grate 9a Grate Surface 11 Pallet Side Wall Floor Floor 11a Pallet sidewall floor bedding layer thickness 11b Pallet sidewall floor floor width 12 Pallet central floor floor 12a Pallet central floor floor thickness 12b Pallet central floor floor width 13 Hopper cutout 14 Pallet sidewall hopper cutout height 14a Pallet sidewall hopper cutout width 15 Pallet center hopper cutout height 15a Pallet center hopper cutout width
Claims (2)
に床敷を装入する際、パレット側壁部床敷層厚が３〜５
０ｍｍ、パレット中央部床敷層厚が２０〜１００ｍｍと
なるように床敷を装入することを特徴とする床敷の装入
方法。1. When the floor covering is loaded on the bottom surface of the sintering pallet of the lower suction type sintering machine, the pallet side wall floor covering layer thickness is 3-5.
A method of loading bedding, characterized in that the bedding is loaded so that the thickness of the bedding is 0 mm and the thickness of the bedding layer in the center of the pallet is 20 to 100 mm.
し口をパレット中央部の切り出し口より１７〜７７ｍｍ
低くしたことを特徴とする床敷ホッパー。2. The cutout on the side wall of the pallet of the floor hopper is 17 to 77 mm from the cutout in the center of the pallet.
A bedding hopper characterized by being lowered.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7918394A JPH07268496A (en) | 1994-03-28 | 1994-03-28 | Charging method of floorpavement and floorpavement hopper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7918394A JPH07268496A (en) | 1994-03-28 | 1994-03-28 | Charging method of floorpavement and floorpavement hopper |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH07268496A true JPH07268496A (en) | 1995-10-17 |
Family
ID=13682872
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7918394A Withdrawn JPH07268496A (en) | 1994-03-28 | 1994-03-28 | Charging method of floorpavement and floorpavement hopper |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07268496A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104278144A (en) * | 2013-07-08 | 2015-01-14 | 鞍钢股份有限公司 | Method for improving limonite sintering productivity |
-
1994
- 1994-03-28 JP JP7918394A patent/JPH07268496A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104278144A (en) * | 2013-07-08 | 2015-01-14 | 鞍钢股份有限公司 | Method for improving limonite sintering productivity |
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