JPS63140009A - Method for generating high-temperature hot air for metallurgical furnace - Google Patents
Method for generating high-temperature hot air for metallurgical furnaceInfo
- Publication number
- JPS63140009A JPS63140009A JP28753786A JP28753786A JPS63140009A JP S63140009 A JPS63140009 A JP S63140009A JP 28753786 A JP28753786 A JP 28753786A JP 28753786 A JP28753786 A JP 28753786A JP S63140009 A JPS63140009 A JP S63140009A
- Authority
- JP
- Japan
- Prior art keywords
- air
- hot air
- heating furnace
- hot
- bricks
- 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
- 238000000034 method Methods 0.000 title claims description 24
- 239000011449 brick Substances 0.000 claims abstract description 41
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 32
- 238000010438 heat treatment Methods 0.000 claims abstract description 26
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 16
- 238000002485 combustion reaction Methods 0.000 claims abstract description 15
- 230000009466 transformation Effects 0.000 claims abstract description 8
- 230000005855 radiation Effects 0.000 claims abstract description 3
- 238000005338 heat storage Methods 0.000 claims description 16
- 230000001172 regenerating effect Effects 0.000 claims description 6
- 238000007664 blowing Methods 0.000 claims description 5
- 230000008929 regeneration Effects 0.000 abstract 3
- 238000011069 regeneration method Methods 0.000 abstract 3
- 238000010586 diagram Methods 0.000 description 12
- 239000007789 gas Substances 0.000 description 7
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 4
- 238000010276 construction Methods 0.000 description 4
- 238000001035 drying Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000002737 fuel gas Substances 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000005422 blasting Methods 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000010411 cooking Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Landscapes
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
- Heat Treatments In General, Especially Conveying And Cooling (AREA)
Abstract
Description
【発明の詳細な説明】
〈発明の目的〉
産業上の利用分野
本発明は冶金炉における高温熱風発生方法に係り、詳し
くは、従来型熱風炉と連続式加熱炉を併用する冶金炉に
おける高温熱風発生方法に係る。[Detailed Description of the Invention] <Object of the Invention> Industrial Application Field The present invention relates to a method for generating high-temperature hot air in a metallurgical furnace, and more particularly, the present invention relates to a method for generating high-temperature hot air in a metallurgical furnace that uses both a conventional hot-air furnace and a continuous heating furnace. It concerns the method of occurrence.
従来の技術
従来、高炉等の冶金炉に使用されている熱風炉は第4図
に示すような蓄熱と放熱を交互に繰返す方式の熱風炉で
あって、形式としては燃焼室と蓄熱室が分れている外燃
式と、両者が一体となっている内燃式とがある。外燃式
の場合、一般には4基の熱風炉から構成されているが、
3基で構成されるものもある。第5図は外燃式の説明図
である。まず、第4図と第5図を用いて従来の熱風炉を
説明すると、第4図において、AおよびBの熱風炉は燃
焼中でCおよびDは放熱中(送風中)である。送風fj
116で昇圧された空気は冷風管1よりCおよびDの蓄
熱’J2cおよび2dに入り、蓄熱室内のギッター煉瓦
3と熱交換し、所定の温度になって熱風管4を通って高
炉などの冶金炉18に供給される。AとBの熱風炉は燃
焼中(蓄熱中)であり、燃料ガスはガス管5により燃焼
室6a、6bに供給される。蓄熱室2のギツター煉瓦と
熱交換された排ガスは、排ガス煙道7を通つて煙突8よ
り大気中に放出される。この時、燃焼中のAと8の熱風
炉の冷風弁9a、9b、熱風弁10a、10bは閉とな
っている。ギッター煉瓦上端の温度11は送風温度にも
よるが、1200〜1500℃、ギツター煉瓦下端の温
度12は200〜300℃となり、上端と下端での温度
差が非常に大きい。そこで、ギツター炊瓦の上半分は高
温に強い珪石煉瓦を使用し、下半分はアルミナ系煉瓦を
使用しているが、珪石煉瓦の変態温度を回避するため、
珪石煉瓦の下端温度13は400℃以上に管理している
。BACKGROUND OF THE INVENTION Conventionally, hot blast furnaces used in metallurgical furnaces such as blast furnaces are hot blast furnaces that alternately store and release heat, as shown in Figure 4, and are separated into a combustion chamber and a heat storage chamber. There are two types: the external combustion type, which is a combination of both, and the internal combustion type, which is a combination of both. In the case of an external combustion type, it generally consists of four hot air stoves, but
Some are composed of three units. FIG. 5 is an explanatory diagram of an external combustion type. First, a conventional hot-blast stove will be explained using FIGS. 4 and 5. In FIG. 4, hot-blast stoves A and B are combusting, and C and D are dissipating heat (blowing air). Air blower fj
The air pressurized at 116 enters the heat storage 'J2c and 2d of C and D from the cold air pipe 1, exchanges heat with the Gitter bricks 3 in the heat storage chamber, reaches a predetermined temperature, passes through the hot air pipe 4, and is sent to metallurgical equipment such as blast furnaces. is supplied to the furnace 18. The hot air stoves A and B are in the process of combustion (heat storage), and fuel gas is supplied to the combustion chambers 6a and 6b through the gas pipe 5. The exhaust gas that has undergone heat exchange with the bricks in the heat storage chamber 2 passes through the exhaust gas flue 7 and is released into the atmosphere from the chimney 8. At this time, the cold air valves 9a and 9b and the hot air valves 10a and 10b of the hot air stoves A and 8 are closed. The temperature 11 at the upper end of the Gitter brick is 1200 to 1500°C, depending on the blowing temperature, and the temperature 12 at the lower end of the Gitter brick is 200 to 300°C, and the temperature difference between the upper and lower ends is very large. For this reason, the upper half of the Gitzter cooking tiles is made of silica brick, which is resistant to high temperatures, and the lower half is made of alumina brick, but in order to avoid the transformation temperature of silica brick,
The lower end temperature 13 of the silica brick is controlled at 400°C or higher.
口のような熱風炉が現在かかえている問題としては、
(1)珪石ギッター煉瓦の変態点(150℃〜300℃
の温度範囲において、変態に伴う異常熱膨張が生じる。The current problems faced by hot air stoves such as the
In the temperature range of , abnormal thermal expansion occurs due to transformation.
)に伴う煉瓦の劣化、崩壊の危険を回避するため、珪石
ギッター煉瓦の下端温度を400℃以上に管理して操業
しているが、これが熱風炉操業範囲を制限している(低
温送風時珪石下端管理温度)。) In order to avoid the risk of brick deterioration and collapse due to low-temperature blasting, the lower end temperature of the silica gitter bricks is controlled at 400°C or higher. lower end control temperature).
(2)従来の熱風炉方式は3基乃至4基で構成されてい
るが、建設費の中で煉瓦費の占める比率〔約30%)が
大きく建設費削減のネックとなっている。(2) The conventional hot air stove system consists of three or four units, but the brick cost accounts for a large proportion of the construction cost (approximately 30%), which is a bottleneck in reducing construction costs.
(3)蓄熱室上部は珪石煉瓦、下部はアルミナ系煉瓦を
使用しているが、アルミナ系煉瓦は珪石煉瓦に比べて価
格が高い。(3) The upper part of the heat storage chamber uses silica bricks, and the lower part uses alumina bricks, but alumina bricks are more expensive than silica bricks.
等の問題がある。There are other problems.
発明が解決しようとする問題点
本発明はこれらの問題点の解決を目的とし、具体的には
、連続式加熱炉の併用によって、低温送風時の欠点を除
き、送[@ 温度のフレキシとりティーを確保し、また
、煉瓦費の削減が可能な高温熱風発生方法を提供する口
とを目的とする。Problems to be Solved by the Invention The present invention aims to solve these problems. Specifically, by using a continuous heating furnace in combination, the disadvantages of low temperature air blowing can be eliminated, and The purpose of the present invention is to provide a method of generating high-temperature hot air that can reduce the cost of bricks.
〈発明の構成〉
問題点を解決するための
手段ならびにその作用
本発明は、蓄熱と放熱を交互に繰返す2基以上の蓄熱式
熱風炉と、熱交換を連続的に行なうことのできる空気加
熱炉とを組合せた高温熱風発生方法において、冶金炉送
風用空気を前記加熱炉で、燃焼状態の蓄熱式熱風炉の排
ガスと熱交換させて珪石煉瓦の変態点以上の温度に予熱
し、この予熱空気を蓄熱状態の蓄熱式熱風炉に供給し、
高温のギッター煉瓦と熱交換させて所定の温度に加熱し
た復、冶金炉に送風することを特徴とする。<Structure of the Invention> Means for Solving the Problems and Their Effects The present invention provides two or more regenerative hot blast furnaces that alternately repeat heat storage and heat release, and an air heating furnace that can continuously perform heat exchange. In the method for generating high-temperature hot air in combination with is supplied to a regenerative hot blast stove in a heat storage state,
It is characterized in that it is heated to a predetermined temperature by exchanging heat with high-temperature Gitter bricks, and then air is blown into a metallurgical furnace.
以下、図面によって本発明の手段たる構成ならびに作用
を説明すると、次の通りである。Hereinafter, the structure and operation of the means of the present invention will be explained with reference to the drawings.
第1図は本発明に係る熱風発生方法を示す説明図であり
、第2図は本発明に使用する連続式加熱炉の一例の説明
図であり、第3図は実施例における熱風発生方法を示す
説明図であり、第4図は従来の熱風発生方法を示す説明
図であり、第5図は従来の外熱式熱風炉の説明図である
。FIG. 1 is an explanatory diagram showing the hot air generation method according to the present invention, FIG. 2 is an explanatory diagram of an example of a continuous heating furnace used in the present invention, and FIG. 3 is an explanatory diagram showing the hot air generation method in the embodiment. FIG. 4 is an explanatory diagram showing a conventional hot air generation method, and FIG. 5 is an explanatory diagram of a conventional external heating type hot air stove.
第1図および第2図によって本発明の高温熱風発生方法
を説明する。The high temperature hot air generation method of the present invention will be explained with reference to FIGS. 1 and 2.
符号14は従来の外熱式熱風炉であって最低2基を使用
する(第1図は2基使用の例を示す。)、。Reference numeral 14 denotes a conventional external heating type hot air stove, and at least two units are used (FIG. 1 shows an example in which two units are used).
15は連続式加熱炉であって、その−例を第2図に示し
た。また、18は冶金炉で、8は煙突、16は送Ji1
機である。15 is a continuous heating furnace, an example of which is shown in FIG. In addition, 18 is a metallurgical furnace, 8 is a chimney, and 16 is a sending pipe.
It is a machine.
送風$111Gによって送風された空気は、燃焼状態の
熱風炉14aの排気および必要に応じてバーナ24によ
って所定温度に保持された連続式加熱炉15内に入り、
多数の伝熱チューブ23で熱交換によって予熱され、ヘ
ッダー25で集合され、弁9bを通って蓄熱状態の熱風
炉14bに入り、高温に加熱されたギッター煉瓦3bと
の熱交換によって更に高温に加熱され、熱風弁10bを
通って冶金炉18へ送られる。一方、加熱炉15がらの
排気は煙突8から排出される。The air blown by the blower $111G enters the continuous heating furnace 15 which is maintained at a predetermined temperature by the exhaust of the hot air stove 14a in a combustion state and by the burner 24 as necessary,
It is preheated by heat exchange in a large number of heat transfer tubes 23, collected in a header 25, passes through a valve 9b, enters a hot blast furnace 14b in a heat storage state, and is further heated to a high temperature by heat exchange with a Gitter brick 3b heated to a high temperature. and sent to the metallurgical furnace 18 through the hot air valve 10b. On the other hand, the exhaust gas from the heating furnace 15 is discharged from the chimney 8.
この際に、空気の予熱温度は必要に応じてバーナ24の
燃焼によって調fl15され、珪石ギンター煉瓦3の変
態温度(150〜300℃)以上、例えば、400℃と
して熱風炉141)に供給される。従って、本発明に帆
用する熱風炉蓄熱室のギッター煉瓦はすべて珪石煉瓦を
使用することができ、従来炉のように高価なアルミナ煉
瓦を使用する必要はないのでコスト的に極めて有利であ
る。At this time, the preheating temperature of the air is adjusted fl15 by combustion in the burner 24 as necessary, and the air is supplied to the hot blast furnace 141) at a temperature higher than the transformation temperature (150 to 300°C) of the silica ginter brick 3, for example, 400°C. . Therefore, silica bricks can be used for all the Gitter bricks in the hot blast furnace heat storage chamber used in the present invention, and there is no need to use expensive alumina bricks as in conventional furnaces, which is extremely advantageous in terms of cost.
また、冶金炉18に送る送風温度の調節方法は、(1)
連続加熱炉のバーナ燃焼ガス量を調整することにより出
側予熱温度をコントロールする。In addition, the method for adjusting the temperature of the air sent to the metallurgical furnace 18 is (1)
The outlet preheating temperature is controlled by adjusting the amount of burner combustion gas in the continuous heating furnace.
(2)熱風炉出側で予熱空気17を混合する。(2) Mix preheated air 17 on the outlet side of the hot air stove.
(3)3基乃至4基の熱風炉により供給される温度レベ
ルの溝なる空気を混合する。(3) Mixing the air in the grooves at the temperature level supplied by three to four hot air stoves.
等の方法によって行なわれる。This is done by methods such as
実施例 以下、実施例によって更に説明する。Example This will be further explained below with reference to Examples.
熱風炉2基と連続式加熱炉1基の組合せによる本発明実
施例を第3図に示す。FIG. 3 shows an embodiment of the present invention using a combination of two hot blast stoves and one continuous heating furnace.
熱風炉IAa、14bは1基燃焼、1基送風で使用し、
連続式加熱炉15は連続使用した。すなわち、第3図に
おいて熱風炉14aは燃焼中(“蓄熱中)で熱風炉14
bは送風中(放熱中)を示し、熱風炉14aの排ガスは
600℃で連続式加熱炉15に供給され、送風機1Gに
よって送風された空気と熱交換し、150℃で煙突8か
ら排出された。一方、連続式加熱炉15で500℃に予
熱された空気は熱11#514bに供給され、高温に蓄
熱された珪石ギッター煉瓦と熱交換して熱風となり、予
熱空気17と混合し、1200℃の熱風として冶金炉に
供給した。One hot air stove IAa and 14b is used for combustion and one for blowing,
The continuous heating furnace 15 was used continuously. That is, in FIG. 3, the hot air stove 14a is in the process of combustion (“heat storage”)
b indicates that air is being blown (during heat dissipation), and the exhaust gas from the hot stove 14a is supplied to the continuous heating furnace 15 at 600°C, exchanges heat with the air blown by the blower 1G, and is discharged from the chimney 8 at 150°C. . On the other hand, the air preheated to 500°C in the continuous heating furnace 15 is supplied to the heat 11#514b, exchanges heat with the silica gitter bricks stored at high temperature, becomes hot air, mixes with the preheated air 17, and reaches 1200°C. It was supplied to the metallurgical furnace as hot air.
なお、熱風炉から出てくる熱風は時間の経過と共に温度
が低下するが、予熱空気17との混合比を変える口とに
より冶金炉に供給する熱風温度を一定に保持することが
できた。Although the temperature of the hot air coming out of the hot air furnace decreases over time, the temperature of the hot air supplied to the metallurgical furnace could be kept constant by changing the mixing ratio with the preheated air 17.
また、以−ヒの如く、熱風炉に供給する予熱空気は50
0℃で供給されるので、珪石ギッター煉瓦の変態点を考
慮することなく長時間の運転を支障なく行なうことがで
きた。In addition, as shown below, the preheated air supplied to the hot air stove is 50%
Since it was supplied at 0°C, it was possible to operate for a long time without any problems without considering the transformation point of the silica Gitter brick.
〈発明の効果〉
以上説明したように、本発明は、蓄熱と放熱を交互に繰
返す2基以上の蓄熱式熱風炉と、熱交換を連続的に行な
うことのできる空気力0熱炉とを組合せた高温熱風発生
方法において、冶金炉送傭用空気を前記加熱炉で、燃焼
状態の蓄熱式熱風炉の排ガスと熱交換させて珪石煉瓦の
変態点以上の温度に予熱し、この予熱空気を蓄熱状態の
蓄熱式熱風炉に供給し、高温のギッター煉瓦と熱交換さ
せて所定の温度に加熱した後、冶金炉に送風する口とを
特徴とする高温熱風発生方法であって、従来方式と比べ
以下の利点がある。すなわち、
1)従来の熱風炉方式よりもトータル建設費が安くなる
。本発明方式の場合、熱風炉基数の削減とそれに伴う煉
瓦重量の減少およびコスi・的に安い珪石煉瓦を全面的
に採用できることにより連続式加熱炉の増設に伴うコス
トアップを考慮に入れてもトータルとしてコストダウン
となる。<Effects of the Invention> As explained above, the present invention combines two or more regenerative hot blast furnaces that alternately repeat heat storage and heat radiation, and an aerodynamic zero-heat furnace that can continuously perform heat exchange. In the method for generating high-temperature hot air, the metallurgical furnace air is preheated in the heating furnace to a temperature higher than the transformation point of the silica brick by exchanging heat with the exhaust gas of the regenerative hot blast furnace in a combustion state, and this preheated air is used for heat storage. This is a method of generating high-temperature hot air, which is characterized by an opening that supplies the air to a regenerative hot air furnace, exchanges heat with high-temperature Gitter bricks, heats it to a predetermined temperature, and then blows the air into the metallurgical furnace. It has the following advantages. In other words: 1) The total construction cost is lower than the conventional hot stove method. In the case of the method of the present invention, the number of hot blast stoves can be reduced, the weight of bricks can be reduced accordingly, and silica bricks, which are low in cost efficiency, can be fully adopted, even taking into account the cost increase associated with the addition of continuous heating furnaces. This results in a total cost reduction.
2)従来方式で問題点となっていた珪石煉瓦の変態点を
考慮する必要がないので、高温送風から低温送風までの
フレキシビリティ−のある操業が可能である。2) Since there is no need to consider the transformation point of silica bricks, which was a problem in the conventional method, flexible operation from high-temperature to low-temperature ventilation is possible.
3)熱風炉を冷間状態から立上げる場合には必が煉瓦乾
燥設備が必要であるが、本発明の場合は連続式加熱炉が
その代替となるため、煉瓦乾燥設備が不要となりコスト
削減に寄与する。3) Brick drying equipment is always required when starting up a hot air stove from a cold state, but in the case of the present invention, a continuous heating furnace is used as an alternative, so brick drying equipment is not required, resulting in cost reduction. Contribute.
4)高炉の改修時において、能力アップ等により熱風炉
能力の増大を必要とする場合、既存熱風炉を活用し、連
続式加熱炉を増設して組合せるごとにより目的を達成で
き、熱風炉増設より建設費が割安となる。4) When renovating a blast furnace, if it is necessary to increase the capacity of the hot blast furnace due to increased capacity, etc., the purpose can be achieved by utilizing the existing hot blast furnace and adding a continuous heating furnace and combining them. Construction costs will be lower.
第1図は本発明に係る熱風発生方法を示す説明図、第2
図は本発明に使用する連続式加熱炉の一例の説明図、第
3図は実施例における熱風発生方法を示す説明図、第4
図は従来の熱III発生方法を示す説明図、第5図は従
来の外熱式熱風炉の説明図である。
符号1・・・・・・冷風管 2・・・・・・蓄熱
室3・・・・・・ギッター煉瓦 4・・・・・・熱風管
5・・・・・・燃料ガス 6・・・・・・燃焼至7
・・・・・・排ガス弁 8・・・・・・煙突」・・
・・・・冷風弁 10・・・・・・熱風弁11・
・・・・・ギッター煉瓦上端温度12・・・・・・ギッ
ター煉瓦下端温度13・・・・・・珪石ギッター煉瓦下
端温度14・・・・・・熱風炉 15・・・・・
・連続式加熱炉1G・・・・・・送出機 17・
・・・・・予熱空気18・・・・・・冶金炉Figure 1 is an explanatory diagram showing the hot air generation method according to the present invention, Figure 2 is an explanatory diagram showing the hot air generation method according to the present invention;
The figure is an explanatory diagram of an example of a continuous heating furnace used in the present invention, FIG. 3 is an explanatory diagram showing a hot air generation method in an embodiment, and FIG.
The figure is an explanatory diagram showing a conventional heat III generation method, and FIG. 5 is an explanatory diagram of a conventional external heat type hot air stove. Code 1... Cold air pipe 2... Heat storage chamber 3... Gitter brick 4... Hot air pipe 5... Fuel gas 6... ...Burning to 7
...Exhaust gas valve 8...Chimney"...
...Cold air valve 10...Hot air valve 11.
... Gitter brick upper end temperature 12 ... Gitter brick lower end temperature 13 ... Silica stone gitter brick lower end temperature 14 ... Hot stove 15 ...
・Continuous heating furnace 1G... Delivery machine 17.
...Preheating air 18 ...Metallurgical furnace
Claims (1)
熱交換を連続的に行なうことのできる空気加熱炉とを組
合せた高温熱風発生方法において、冶金炉送風用空気を
前記加熱炉で、燃焼状態の蓄熱式熱風炉の排ガスと熱交
換させて珪石煉瓦の変態点以上の温度に予熱し、この予
熱空気を蓄熱状態の蓄熱式熱風炉に供給し、高温のギッ
ター煉瓦と熱交換させて所定の温度に加熱した後、冶金
炉に送風することを特徴とする高温熱風発生方法。Two or more heat storage type hot air stoves that alternately repeat heat storage and heat radiation,
In a method for generating high-temperature hot air in combination with an air heating furnace capable of continuous heat exchange, air for blowing the metallurgical furnace is heat-exchanged with exhaust gas from a regenerative hot air furnace in a combustion state in the heating furnace to form silica bricks. The preheated air is preheated to a temperature above the transformation point of A method for generating high-temperature hot air.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP28753786A JPH0730374B2 (en) | 1986-12-02 | 1986-12-02 | Method for generating high temperature hot air in a metallurgical furnace |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP28753786A JPH0730374B2 (en) | 1986-12-02 | 1986-12-02 | Method for generating high temperature hot air in a metallurgical furnace |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS63140009A true JPS63140009A (en) | 1988-06-11 |
JPH0730374B2 JPH0730374B2 (en) | 1995-04-05 |
Family
ID=17718623
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP28753786A Expired - Lifetime JPH0730374B2 (en) | 1986-12-02 | 1986-12-02 | Method for generating high temperature hot air in a metallurgical furnace |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0730374B2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2509121A (en) * | 2012-12-21 | 2014-06-25 | Siemens Plc | Hot blast stoves where cold blast air has been passed through a heat exchanger |
-
1986
- 1986-12-02 JP JP28753786A patent/JPH0730374B2/en not_active Expired - Lifetime
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2509121A (en) * | 2012-12-21 | 2014-06-25 | Siemens Plc | Hot blast stoves where cold blast air has been passed through a heat exchanger |
GB2509121B (en) * | 2012-12-21 | 2015-03-18 | Siemens Plc | Apparatus for supplying blast to a blast furnace |
US9868998B2 (en) | 2012-12-21 | 2018-01-16 | Primetals Technologies Ltd | Method and apparatus for supplying blast to a blast furnace |
Also Published As
Publication number | Publication date |
---|---|
JPH0730374B2 (en) | 1995-04-05 |
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