JPS5848828B2 - Raw material charging device for reduction furnace - Google Patents
Raw material charging device for reduction furnaceInfo
- Publication number
- JPS5848828B2 JPS5848828B2 JP11930576A JP11930576A JPS5848828B2 JP S5848828 B2 JPS5848828 B2 JP S5848828B2 JP 11930576 A JP11930576 A JP 11930576A JP 11930576 A JP11930576 A JP 11930576A JP S5848828 B2 JPS5848828 B2 JP S5848828B2
- Authority
- JP
- Japan
- Prior art keywords
- furnace
- raw material
- passage
- rotary plate
- charging device
- 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
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct processes
- C21B13/02—Making spongy iron or liquid steel, by direct processes in shaft furnaces
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacture Of Iron (AREA)
- Vertical, Hearth, Or Arc Furnaces (AREA)
Description
【発明の詳細な説明】
この発明は還元炉の原材料装入装置に係り、特に直立型
シャフト炉の如き還元炉に原材料(酸化鉄等)を投入す
るための装入装置であり、炉頂部の投入口に、該投入口
より炉内へ通路を挿入連設し、該通路の炉内側出口に離
間させて円盤状の回転板を支持して、該回転板を回転駆
動させつつ回転遠心力により原材料を炉内に適宜分配す
るように構或したことを特徴とする還元炉の原材料装入
装置に関するものである。[Detailed Description of the Invention] This invention relates to a raw material charging device for a reduction furnace, and in particular is a charging device for charging raw materials (iron oxide, etc.) into a reduction furnace such as an upright shaft furnace. A passage is inserted into the furnace from the input port, and a disk-shaped rotary plate is supported at a distance from the outlet of the passage inside the furnace, and while the rotary plate is rotationally driven, the rotational centrifugal force is applied. The present invention relates to a raw material charging device for a reduction furnace, characterized in that the raw material is configured to appropriately distribute the raw material into the furnace.
従来、この種還元炉にあっては、炉頂部にホッパを備え
た開口部が設けられ、コンベア等で搬送されて来る酸化
鉄等の原材料は上記ホッパより炉内に投入乃至装入され
ているものである。Conventionally, this type of reduction furnace has an opening equipped with a hopper at the top of the furnace, and raw materials such as iron oxide, which are conveyed by a conveyor etc., are charged or charged into the furnace from the hopper. It is something.
特に、炉内は還元ガス等の反応ガスが充満して(・るの
で、原材料の投入時に炉内ガスが外部に漏洩する危険が
あった。In particular, since the inside of the furnace was filled with reactive gases such as reducing gas, there was a risk that the gas inside the furnace would leak to the outside when raw materials were introduced.
そこで、炉内ガスの漏洩を防止するために、開口部の径
を小さく締るように構成してL・る。Therefore, in order to prevent the leakage of gas in the furnace, the diameter of the opening is configured to be small.
このように、原材料の投入乃至装入口の径が小さ〜・た
めに、炉内に装入される原材料は炉中央部を中心に堆積
されるようになる。As described above, since the diameter of the raw material input or charging inlet is small, the raw material charged into the furnace is deposited mainly at the center of the furnace.
特に還元炉にあっては炉側壁方向より炉内に反応還元ガ
スが供給されるので、炉中央部分の還元化が遅れ、炉側
壁近傍部分の還元化より早くなる傾向にある。In particular, in a reducing furnace, since the reactive reducing gas is supplied into the furnace from the direction of the furnace side wall, reduction in the central portion of the furnace tends to be delayed and reduction occurs faster than in the vicinity of the furnace side wall.
そこで、炉内側壁方向により多くの原材料を分配する如
く、装入して炉内の適正な流れ分布が得られることが望
まれていた。Therefore, it has been desired to distribute more of the raw material toward the inner wall of the furnace to obtain an appropriate flow distribution in the furnace by charging the raw material.
また、従来装置にあっては原材料の装入時に炉内ガスが
外部に漏洩するので、この炉内ガスの漏洩するために投
入口乃至装入口に開閉蓋等を設け、これを開閉しながら
一定量づつ装入すると云うバッチ式が一般に採用され、
一方連続的に原材料を炉内に装入するに際しては複雑な
気密保持手段等を設ける必要があり、構造が複雑になる
欠点があった。In addition, in conventional equipment, gas inside the furnace leaks to the outside when raw materials are charged, so in order to prevent this gas from leaking out, an opening/closing lid, etc. is installed at the inlet or charging inlet, and the lid is opened and closed at a constant rate. A batch method is generally adopted in which the material is charged in small quantities.
On the other hand, when raw materials are continuously charged into the furnace, it is necessary to provide complicated airtightness means, which has the disadvantage of complicating the structure.
そこで、本発明者は従来装置の問題点に鑑み、鋭意研究
の結果これらを有効に解決すべく本発明を完成するに至
ったものである。Therefore, in view of the problems of the conventional apparatus, the present inventor has conducted intensive research and has completed the present invention in order to effectively solve these problems.
この発明の目的とするところは、炉頂部の原材料投入口
に、該投入口より炉内へ通路を連設し、該通路の直下に
離間させて回転板を支持して、該回転板の遠心力で原材
料を炉内に分配するようになして、炉内に適正に分配し
つつ連続的に原材料を投入乃至装入し得、且つ炉内の原
材料の流れ分布を適切になし得ると共に炉の運転操業を
連続的になし得る還元炉の原材料装入装置を提供する。The object of the present invention is to provide a passage connected to the raw material input port at the top of the furnace from the input port into the furnace, support a rotary plate at a distance directly below the passage, and centrifuge the rotary plate. By distributing the raw material into the furnace by force, it is possible to continuously charge or charge the raw material while properly distributing it in the furnace, and to properly distribute the flow of the raw material in the furnace, and to improve the flow of the furnace. Provided is a raw material charging device for a reduction furnace that can be operated continuously.
また、本発明の目的とするところは炉頂部の投入口に通
路を連設し、該通路の直下に回転板を支持して、投入口
より投入される原材料を通路と回転板との間に常時滞留
させて炉内還元ガス炉外漏洩を極小し投入口近傍の気密
保持を容易になし得る還元炉の原材料装入装置を提供す
る。Further, the object of the present invention is to provide a passage connected to the input port at the top of the furnace, support a rotary plate directly below the passage, and transfer the raw materials input from the input port between the passage and the rotary plate. To provide a raw material charging device for a reduction furnace which can constantly retain the reducing gas inside the furnace, minimize leakage of reducing gas outside the furnace, and easily maintain airtightness near the charging port.
更に、本発明の目的とするところは回転板の回転速度を
匍脚することにより、炉内への原材料の装入量を自動調
整し得ると共に連続装入もなし得る還元炉の原材料装入
装置を提供する。Furthermore, an object of the present invention is to provide a raw material charging device for a reduction furnace that can automatically adjust the amount of raw materials charged into the furnace and also perform continuous charging by adjusting the rotational speed of the rotary plate. I will provide a.
また、本発明の目的とするところは構造が極めて簡単で
且つ保守点検が容易であり、従来この種の炉に簡単に取
り付けることができる還元炉の原材料装入装置を提供す
る。Another object of the present invention is to provide a raw material charging device for a reduction furnace that has an extremely simple structure, is easy to maintain and inspect, and can be easily installed in conventional furnaces of this type.
次に、本発明の好適一実施例にっ(・て、添付図面に従
って詳述する。Next, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.
第1図は本発明に係る装置を備える還元炉の縦断正面図
であり、第2図は本装置に用いる回転板の平面図、第3
図は変形実施例を示す縦断正面図、第4図は駆動装置の
別実施例を示す側断面図である。FIG. 1 is a longitudinal sectional front view of a reduction furnace equipped with an apparatus according to the present invention, FIG. 2 is a plan view of a rotary plate used in this apparatus, and FIG.
The figure is a longitudinal sectional front view showing a modified embodiment, and FIG. 4 is a side sectional view showing another embodiment of the drive device.
第1図に示す如く、直立型シャフト炉1の頂部2の中央
に円形の開口部3が設けられる。As shown in FIG. 1, a circular opening 3 is provided in the center of the top 2 of the upright shaft furnace 1.
この開口部3には上部にホツバ4を備えた筒体5が装着
される。A cylindrical body 5 having a flap 4 on its upper part is attached to this opening 3.
この筒体5は開口部3より炉1内に臨む通路6を形成す
る。This cylindrical body 5 forms a passage 6 facing into the furnace 1 from the opening 3.
この通路6は上記筒体5内に縦方向に且つ径の小さL゛
内筒体7が支持されて区画される。This passage 6 is vertically defined within the cylindrical body 5 by supporting a L-inner cylindrical body 7 having a small diameter.
筒体5の上部に備えられたホツパ4の上面開口部8は上
記筒体5内に挿通された部分を除(・て覆板9で覆われ
、該覆板9には原材料投入口10が適宜数図示では左右
に二個開設され、この投入口io,ioのそれぞれ上方
には原材料を搬送するコンベア11,11の終端部が位
置して(・る。The upper surface opening 8 of the hopper 4 provided at the upper part of the cylinder 5 is covered with a cover plate 9 except for the part inserted into the cylinder 5, and the cover plate 9 has a raw material input port 10. As shown in the figures, two conveyors 11, 11 for conveying the raw materials are located above the input ports io, io, respectively.
通路6の下部は開放され、筒体5は高位にまた内筒体7
は低位まで延長し通路6下部に排出口12を形成する。The lower part of the passage 6 is open, and the cylindrical body 5 is placed in a higher position and the inner cylindrical body 7 is opened.
extends to a lower level to form a discharge port 12 at the bottom of the passage 6.
上記通路6の下部排出口12の直下には一定の間隔を設
けて離間されて、回転板13が支持される。Directly below the lower discharge port 12 of the passage 6, a rotary plate 13 is supported at a predetermined distance.
この回転板13は上記通路6の横断面積より大径の円盤
より構成され、その中心には直立する軸部材14が一体
的に起立設置される。The rotary plate 13 is constituted by a disk having a diameter larger than the cross-sectional area of the passage 6, and an upright shaft member 14 is integrally installed in the center thereof.
該軸部材14の上部は上記内筒体7内を挿通し、ホツパ
4を覆う覆板9上に突出する。The upper part of the shaft member 14 passes through the inner cylindrical body 7 and projects onto the cover plate 9 that covers the hopper 4.
このように、通路6を形成する筒体5の下端と回転板1
3の上面間には円周上に開放された上記排出口12が形
成される。In this way, the lower end of the cylinder 5 forming the passage 6 and the rotating plate 1
The discharge port 12, which is open on the circumference, is formed between the upper surfaces of the discharge ports 3 and 3.
この排出口12の上には原料が円盤上13で空回転する
のを防ぎ、さらに補強の役目も兼ねた邪魔板22を数ケ
所取付ける。Several baffle plates 22 are installed above the discharge port 12 to prevent the raw material from rotating idly on the disk 13 and also to serve as reinforcement.
一方、ホッパ4を含む炉頂部2はシールボックス17で
囲み、該シールボックス17は炉頂部2上に支持され、
内部に前記したコンベア1 1. ,1 1も設げられ
てL・る。On the other hand, the furnace top 2 including the hopper 4 is surrounded by a seal box 17, and the seal box 17 is supported on the furnace top 2,
Conveyor 1 described above 1. , 1 1 is also provided.
このシールボックス17の上面板15の中心部は開口さ
れ、この開口部16より上記軸部材14の上端を上面板
15上に突出し、該軸部材14の上面板15の開口部1
6はシール部材を兼ねる軸受18で支持する。The center of the upper plate 15 of this seal box 17 is opened, and the upper end of the shaft member 14 protrudes onto the upper plate 15 through this opening 16.
6 is supported by a bearing 18 which also serves as a seal member.
軸部材14のシールボックス17上に突出した部分14
aは駆動装置19に連結される。Portion 14 of shaft member 14 protruding above seal box 17
a is connected to the drive device 19.
従って軸部材14が回転駆動されることにより、回転板
13を回転せしめる。Therefore, when the shaft member 14 is rotationally driven, the rotating plate 13 is rotated.
上記駆動装置19は例えばモータによるリングギャ伝動
方式、あるL゛はモータチェン、スプロケット伝動方式
等が採用されるが、要は軸部材14を回転駆動せしめ、
且つ正逆自由に回転出来、更に回転速度を可変的制御し
得る様に構成するものであればよL・。The driving device 19 may be, for example, a ring gear transmission system using a motor, a motor chain, a sprocket transmission system, etc., but the essential point is to drive the shaft member 14 in rotation.
If it is configured so that it can rotate freely in forward and reverse directions, and the rotational speed can be controlled variably, then it is acceptable.
従って、第4図に示す如く駆動装置19を構成すること
も出来る。Therefore, the drive device 19 can also be configured as shown in FIG.
第4図は軸部材14の上部14aとシールボックス17
との隙間にシール部材21を挟入するとともに、軸部材
14の上端近傍にリングギアー23を嵌挿固着し、この
リングギアー23の周囲を軸受部材18によって回動自
在に支持したものである。FIG. 4 shows the upper part 14a of the shaft member 14 and the seal box 17.
A seal member 21 is inserted into the gap between the shaft member 14, a ring gear 23 is fitted and fixed near the upper end of the shaft member 14, and the ring gear 23 is rotatably supported by a bearing member 18.
このリングギアー23にはモーター等の駆動装置25に
よって回転駆動される歯車24が噛合され、これによっ
て軸部材14が回転するように構成したものである。A gear 24 rotationally driven by a drive device 25 such as a motor is meshed with the ring gear 23, and the shaft member 14 is thereby rotated.
また軸14は上下方向にも可動可能な構造とし、最適な
分布が選べる構造とする。Further, the shaft 14 is structured to be movable in the vertical direction, so that the optimum distribution can be selected.
上記回転板13は第2図に示す如く、円盤状の平板より
なり、その表面即ち排出口12に臨む面上には直立に起
立する軸部材14を中心として半径方向に放射状の溝2
0が刻設されて(・る。As shown in FIG. 2, the rotating plate 13 is made of a disk-shaped flat plate, and on its surface, that is, the surface facing the discharge port 12, there are grooves 2 radially extending in the radial direction around the shaft member 14 that stands upright.
0 is engraved (・ru.
次に、第3図に示す変形実施例を説明する。Next, a modified embodiment shown in FIG. 3 will be described.
図示する如く、炉頂2に開口部3が設けられ、この開口
部3には筒体5が挿設されて、通路6が形成される。As shown in the figure, an opening 3 is provided at the top of the furnace 2, and a cylindrical body 5 is inserted into the opening 3 to form a passage 6.
この通路6を形成する筒体5の上部にはホッパ4が設け
られ、他方下部には排出口12が形成される。A hopper 4 is provided in the upper part of the cylinder 5 forming the passage 6, and a discharge port 12 is formed in the lower part.
上記ホツパ4の上部開口部8にはこれを覆う覆板9が設
げられる。A cover plate 9 is provided at the upper opening 8 of the hopper 4 to cover it.
また、この覆板9には第1図に示した実施例と同様に原
材料投入口10,10が設げられ、且つ搬送用のコンベ
ア11,11の終端部が位置される。Further, this cover plate 9 is provided with raw material input ports 10, 10 as in the embodiment shown in FIG. 1, and the terminal ends of conveyors 11, 11 for conveyance are located.
上記通路6の下部排出口12の直下には一定の間隔を設
けて離間された回転板13が支持される。Directly below the lower discharge port 12 of the passage 6, a rotary plate 13 is supported at a constant interval.
この回転板13の下面には駆動手段19aが設げられ、
回転板13を可変自在に駆動し得るように構成される。A driving means 19a is provided on the lower surface of the rotary plate 13,
The rotating plate 13 is configured to be able to be variably driven.
尚、この駆動手段19aはローラ、あるち・はコロ等の
伝動部材を介設して回転板13を支承しつつ回転駆動す
る。The driving means 19a rotates and supports the rotary plate 13 through a transmission member such as a roller or the like.
また、ホツパ14を含む炉頂部2はシールボックス17
によって囲まれて℃・る。Further, the furnace top 2 including the hopper 14 has a seal box 17
Surrounded by ℃・ru.
次に、以上の構成から成る装置の操作方法につL・て詳
述する。Next, a method of operating the apparatus having the above configuration will be explained in detail.
原材料Wである酸化鉄ペレットはコンベア11,11で
搬送され、投入口10,10上で連続的にホッパ4内に
投入される。Iron oxide pellets, which are the raw material W, are conveyed by conveyors 11, 11, and are continuously thrown into the hopper 4 on the input ports 10, 10.
投入された原材料Wはホツパ4の傾斜面に案内されて通
路6上部に至り、且つ順次降下して回転板13上に至る
。The input raw material W is guided by the inclined surface of the hopper 4 and reaches the upper part of the passage 6, and then sequentially descends to reach the rotary plate 13.
また、通路下部排出口12と回転板13との間は一定の
間隙が設けられてL・るので、通路6から回転板13上
に流出する原材料Wは安息角θを形成する。Further, since a constant gap L is provided between the passage lower discharge port 12 and the rotary plate 13, the raw material W flowing out from the passage 6 onto the rotary plate 13 forms an angle of repose θ.
上記投入口10より連続的に原材料Wを投入しつつ、回
転板13を回転駆動させて、その遠心力により炉1内に
分配しながら装入する。While continuously charging the raw material W through the charging port 10, the rotating plate 13 is driven to rotate, and the raw material W is distributed and charged into the furnace 1 by its centrifugal force.
原材料Wを炉内側壁方向に装入するに際しては回転板1
30回転速度を高速にし.、他方炉内中央部分に分配装
入するときは回転速度を低速にする。When charging the raw material W toward the inner wall of the furnace, the rotating plate 1
30 Increase the rotation speed. On the other hand, when distributing and charging the central part of the furnace, the rotation speed is set to be low.
このように、回転変130回転速度を可変的に制御しつ
つ、炉内に分散乃至分配して、原材料を連続的に装入す
る。In this way, while variably controlling the rotational speed of the rotary variable 130, the raw materials are dispersed or distributed into the furnace and are continuously charged.
特に、還元炉にあっては炉内側壁方向の還元化が早くな
るので、これに相応させて側壁方向により多くの原材料
Wである酸化鉄ペレットを装入することにより、炉内の
流下分布が適切に保持し得る。In particular, in a reduction furnace, reduction occurs faster in the direction of the inner wall of the furnace, so by charging more iron oxide pellets, which is the raw material W, in the direction of the side wall, the flow distribution in the furnace can be improved. Can be held properly.
また、第2図に示す如く、回転板130表面に溝20を
設けておくことにより、原材料と回転板の摩擦力を高め
て、分散飛行距離を高めることができる。Further, as shown in FIG. 2, by providing grooves 20 on the surface of the rotary plate 130, the frictional force between the raw material and the rotary plate can be increased, and the dispersion flight distance can be increased.
この回転板13を第2図に示す例とは別に、その表面の
粗度、ある(・は素材を選択することにより遠心力で分
散される原材料の飛行距離を調節することができる。Apart from the example shown in FIG. 2, this rotary plate 13 is different from the one shown in FIG. 2. By selecting its surface roughness and material, the flight distance of the raw material dispersed by centrifugal force can be adjusted.
このように、回転板13を回転駆動することにより、ホ
ッパより投入される原材料Wを炉内に適宜分配装入し得
ることは勿論、更に回転速度を可変的制御することによ
り、炉内に装入する装入量をも容易に且つ自由に調節す
ることができる。In this way, by rotationally driving the rotary plate 13, it is possible to suitably distribute and charge the raw material W introduced from the hopper into the furnace, and furthermore, by variably controlling the rotation speed, it is possible to charge the raw material W into the furnace. The charging amount can also be easily and freely adjusted.
更に、回転板13と通路6の排出口12との間にて定の
間隙を有して原材料Wの安息角θを形成し且つ投入ホツ
パ4と通路6との間には原材料Wが常時滞留して(・る
ために、炉1内の還元ガメ等は遮蔽されて投入口10に
まで、漏洩して来ることは極めて少くなL・。Furthermore, there is a certain gap between the rotating plate 13 and the discharge port 12 of the passage 6 to form an angle of repose θ for the raw material W, and the raw material W is always retained between the input hopper 4 and the passage 6. In order to do this, the reduced gas in the furnace 1 is shielded and it is extremely unlikely that it will leak into the inlet 10.
以上要するに本発明によれば、炉頂部の原材料投入口に
通路を連設し、該通路の直下に離間させて回転板を支持
して、該回転板を回転させてその遠心力により原材料を
炉内に適宜分配しつつ装入し得且つ炉内の原材料の流れ
分布を適切になし得ると共に炉の運転操業を連続的にな
し得ることができる。In summary, according to the present invention, a passage is connected to the raw material input port at the top of the furnace, a rotary plate is supported at a distance directly below the passage, and the rotary plate is rotated to feed the raw material into the furnace by its centrifugal force. The raw materials can be charged while being distributed appropriately within the furnace, and the flow distribution of the raw materials within the furnace can be appropriately achieved, and the furnace can be operated continuously.
また、本発明によれば、投入される原材料により投入口
近傍の気密保持を容易になし得ることができるものであ
る。Further, according to the present invention, it is possible to easily maintain airtightness around the input port depending on the raw materials input.
更に、本発明によれば、回転板の回転速度を制御するこ
とにより、炉内への原材料の装入量を自動調整しつつ連
続的に装入し得るものである。Further, according to the present invention, by controlling the rotational speed of the rotating plate, the amount of raw materials charged into the furnace can be automatically adjusted and continuously charged.
また、本発明はその構造が極めて簡単で且つ保守点検が
容易であり、従来の還元炉にも簡単に取り付けることが
できる等優れた諸特長を発揮する。Further, the present invention exhibits various excellent features such as an extremely simple structure, easy maintenance and inspection, and the ability to be easily installed in a conventional reduction furnace.
第1図は本発明に係る還元炉の原材料装入装置を示す縦
断正面図、第2図は本装置に用(・る回転板の平面図、
第3図は変形実施例を示す縦断正面図、第4図は駆動装
置の別実施例を示す側断面図である。
図中、1は還元炉、2は炉頂部、10は投入口、6は通
路、13は回転板である。Fig. 1 is a longitudinal sectional front view showing a raw material charging device for a reduction furnace according to the present invention, and Fig. 2 is a plan view of a rotary plate used in this device.
FIG. 3 is a longitudinal sectional front view showing a modified embodiment, and FIG. 4 is a side sectional view showing another embodiment of the drive device. In the figure, 1 is a reduction furnace, 2 is a furnace top, 10 is an inlet, 6 is a passage, and 13 is a rotating plate.
Claims (1)
を連設し、該通路の直下に離間させて回転板を支持して
、該回転板で原材料を炉内に分配するように構成したこ
とを特徴とする還元炉の原材料装入装置。1. A passage is connected to the raw material input port at the top of the furnace from the input port into the furnace, and a rotary plate is supported at a distance directly below the passage, so that the raw material is distributed into the furnace by the rotary plate. A raw material charging device for a reduction furnace characterized by the following configuration.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11930576A JPS5848828B2 (en) | 1976-10-06 | 1976-10-06 | Raw material charging device for reduction furnace |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11930576A JPS5848828B2 (en) | 1976-10-06 | 1976-10-06 | Raw material charging device for reduction furnace |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5352204A JPS5352204A (en) | 1978-05-12 |
JPS5848828B2 true JPS5848828B2 (en) | 1983-10-31 |
Family
ID=14758126
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP11930576A Expired JPS5848828B2 (en) | 1976-10-06 | 1976-10-06 | Raw material charging device for reduction furnace |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5848828B2 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102925613B (en) * | 2012-11-22 | 2013-12-18 | 重庆赛迪工业炉有限公司 | Disc type discharge machine of rotary hearth furnace for reducing ion directly at high temperature |
-
1976
- 1976-10-06 JP JP11930576A patent/JPS5848828B2/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
JPS5352204A (en) | 1978-05-12 |
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