JP2757679B2 - Heat recovery method from blast furnace slag - Google Patents
Heat recovery method from blast furnace slagInfo
- Publication number
- JP2757679B2 JP2757679B2 JP4115928A JP11592892A JP2757679B2 JP 2757679 B2 JP2757679 B2 JP 2757679B2 JP 4115928 A JP4115928 A JP 4115928A JP 11592892 A JP11592892 A JP 11592892A JP 2757679 B2 JP2757679 B2 JP 2757679B2
- Authority
- JP
- Japan
- Prior art keywords
- slag
- heat
- water
- blast furnace
- supply pipe
- 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 - Fee Related
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B2400/00—Treatment of slags originating from iron or steel processes
- C21B2400/02—Physical or chemical treatment of slags
- C21B2400/022—Methods of cooling or quenching molten slag
- C21B2400/024—Methods of cooling or quenching molten slag with the direct use of steam or liquid coolants, e.g. water
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B2400/00—Treatment of slags originating from iron or steel processes
- C21B2400/02—Physical or chemical treatment of slags
- C21B2400/032—Separating slag from liquid, e.g. from water, after quenching
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B2400/00—Treatment of slags originating from iron or steel processes
- C21B2400/05—Apparatus features
- C21B2400/062—Jet nozzles or pressurised fluids for cooling, fragmenting or atomising slag
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B2400/00—Treatment of slags originating from iron or steel processes
- C21B2400/05—Apparatus features
- C21B2400/066—Receptacle features where the slag is treated
- C21B2400/072—Tanks to collect the slag, e.g. water tank
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B2400/00—Treatment of slags originating from iron or steel processes
- C21B2400/05—Apparatus features
- C21B2400/066—Receptacle features where the slag is treated
- C21B2400/074—Tower structures for cooling, being confined but not sealed
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B2400/00—Treatment of slags originating from iron or steel processes
- C21B2400/08—Treatment of slags originating from iron or steel processes with energy recovery
Landscapes
- Manufacture Of Iron (AREA)
- Furnace Details (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、溶融スラグを水砕スラ
グとして資源化すると共に、保有する熱エネルギーを有
効に回収する技術に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technique for recycling molten slag as granulated slag as resources and effectively recovering the retained thermal energy.
【０００２】[0002]
【従来の技術】高炉の溶融スラグを急冷凝固させて資源
化し、同時に熱回収することを目的に、気体による急冷
方法や特殊な間接熱交換器を用いた方法など、多数の方
法が提案されている。しかし、凝固スラグのガラス化率
が不十分で良質の資源化が図れないことや、設備の安定
した操業ができないこと等の理由で実用化されていな
い。2. Description of the Related Art A number of methods have been proposed, such as a gas quenching method and a method using a special indirect heat exchanger, for the purpose of rapidly solidifying molten slag in a blast furnace to make it a resource and simultaneously recovering heat. I have. However, it has not been put to practical use because the vitrification rate of the solidified slag is insufficient and high-quality resources cannot be obtained, and stable operation of the equipment cannot be performed.
【０００３】一方、溶融スラグを水で急冷し、水砕を製
造すると同時に熱回収を行う方法としては、発生する温
排水から熱回収するものが、特開昭５７−５５３９１号
で提案されている。また、溶融スラグを水で急冷し、水
砕を製造すると同時に、発生する蒸気から熱回収するも
のが、特開昭５７−７８４８号で提案されている。On the other hand, Japanese Patent Application Laid-Open No. 57-55391 proposes a method of quenching molten slag with water to produce water granulation and recover heat at the same time as generating heat. . Japanese Patent Application Laid-Open No. 57-7848 proposes a method in which molten slag is quenched with water to produce water granules and simultaneously recover heat from generated steam.
【０００４】[0004]
【発明が解決しようとする課題】上記特開昭５７−５５
３９１号では、発生する温排水から熱回収している。こ
れでは、温排水の温度は６０〜９０℃程度であり、この
温排水を熱源として水蒸気やフロン蒸気を発生する場
合、温水の顕熱を回収利用するため、発生できる蒸気の
温度は熱源の温排水よりかなり低くなる。また、温排水
が保有している熱量の数分の一しか回収することができ
ない。また、この温排水を吸収式ヒートポンプの熱源と
して利用する場合にも同様の問題がある。Problems to be Solved by the Invention
In No. 391, heat is recovered from the generated warm wastewater. In this case, the temperature of the hot waste water is about 60 to 90 ° C. When steam or Freon steam is generated using the hot waste water as a heat source, the sensible heat of the hot water is recovered and used. It is much lower than drainage. Also, only a fraction of the amount of heat held by the hot wastewater can be recovered. Further, there is a similar problem when this hot waste water is used as a heat source of an absorption heat pump.
【０００５】一方、現状の水砕製造設備では、スラグ冷
却槽への溶融スラグ供給部は大気開放となっており、廃
蒸気の放散管のドラフト効果により、空気が吸込まれ廃
蒸気に混入する。そのため、廃蒸気の温度が低下する。
また、廃蒸気を凝縮させて熱を回収する場合、空気が混
入していると熱伝達率が低下し、熱交換器が大きくな
る。これらのため、現状の設備では、廃蒸気から効果
的、経済的に熱を回収することはできない。On the other hand, in the current water granulation production facility, the molten slag supply section to the slag cooling tank is open to the atmosphere, and the air is sucked in and mixed with the waste steam by the draft effect of the waste steam discharge pipe. Therefore, the temperature of the waste steam decreases.
In the case where heat is recovered by condensing waste steam, if air is mixed, the heat transfer coefficient decreases, and the size of the heat exchanger increases. For these reasons, current equipment cannot effectively and economically recover heat from waste steam.
【０００６】上記特開昭５７−７８４８号では、発生す
る蒸気から熱を回収しており、潜熱部分の熱回収が主体
となるため、蒸気が保有する熱量の８０％程度を回収で
きる。また、上記の温排水からの熱回収に比べ、高い温
度の熱を得ることができる。そして、この方法では、上
記の廃蒸気に空気が混入する問題を回避するために、高
炉出さい口と水砕化装置を密閉溶さい樋で連結した設備
を用いている。In Japanese Patent Laid-Open No. 57-7848, heat is recovered from generated steam, and mainly heat recovery of a latent heat portion is performed, so that about 80% of the amount of heat held by the steam can be recovered. Further, heat at a higher temperature can be obtained as compared with the above-described heat recovery from hot wastewater. In this method, in order to avoid the problem that air is mixed into the waste steam, a facility in which the outlet of the blast furnace and the water granulation device are connected by a closed melting gutter is used.
【０００７】しかし、この方式では、高炉と水砕化装置
が密閉樋で接続されていることから、スラグ排出量の変
動などに起因する水砕化装置の圧力変動が高炉側に影響
し、安全確実な操業に悪影響を及ぼす。また、設備は加
圧密閉系となり高価になる。これらのために実用になっ
ていない。However, in this method, since the blast furnace and the water granulation device are connected by a closed gutter, the pressure fluctuation of the water granulation device caused by the fluctuation of the slag discharge affects the blast furnace side, and the safety is increased. It has an adverse effect on reliable operation. In addition, the equipment becomes a pressurized closed system and becomes expensive. These are not practical.
【０００８】この発明は、上記のような問題点を解決す
るためになされたもので、溶融スラグを急冷して良質の
水砕として資源化すると同時に、効果的な熱回収を行う
ことを目的としている。The present invention has been made in order to solve the above-mentioned problems, and has as its object to quench molten slag to turn it into a resource as high-quality water granulation and to perform effective heat recovery. I have.
【０００９】[0009]
【課題を解決するための手段】本発明の高炉スラグから
熱回収方法は、高炉等の溶融スラグに、スラグ冷却槽で
水を噴射して急冷却し水砕スラグを製造する共に、直接
熱交換により発生する排熱を回収する方法において、According to the method for recovering heat from blast furnace slag of the present invention, water is injected into a molten slag of a blast furnace or the like in a slag cooling tank to rapidly cool the slag, thereby producing granulated slag and direct heat exchange. In the method of recovering the exhaust heat generated by
【００１０】上記スラグ冷却槽を大気圧で稼働させる。
溶融スラグを供給するスラグ供給管は、溶融スラグ供給
量の変動に対応できる充分な断面積をもち、溶融スラグ
が充満すること無く流れるものとする。スラグ供給管の
上部空間を通って、スラグ冷却槽に空気が吸い込まれる
ことを防ぐため、スラグ供給管の途中には、大気圧より
僅かに低い圧力の吸引排気部を設ける。このような設備
を用い、上記直接熱交換により発生する蒸気から熱交換
器により熱を回収するようにしたことを特徴とするもの
である。The slag cooling tank is operated at atmospheric pressure.
The slag supply pipe that supplies the molten slag has a sufficient cross-sectional area that can cope with a variation in the supply amount of the molten slag, and the molten slag flows without being filled. In order to prevent air from being sucked into the slag cooling tank through the upper space of the slag supply pipe, a suction / exhaust unit having a pressure slightly lower than the atmospheric pressure is provided in the middle of the slag supply pipe. Using such equipment, heat is recovered by a heat exchanger from steam generated by the direct heat exchange.
【００１１】[0011]
１）スラグ供給管に、例えば吸引排気装置を設け、減圧
状態にし、空気の吸込みを防止し、廃蒸気に空気が混入
することを抑制することにより、次の利点が生じる。 ａ．図２に示すように、廃蒸気の温度を高めることがで
き、高温の熱を回収することができる。 ｂ．蒸気から熱交換器により熱を回収するに際し、図３
に示すように、熱伝達率を高めることができ、熱交換器
が小型で経済的なものとなる。1) A slag supply pipe is provided with, for example, a suction / exhaust device so as to be in a reduced pressure state, to prevent air from being sucked, and to suppress air from being mixed into waste steam, thereby providing the following advantages. a. As shown in FIG. 2, the temperature of the waste steam can be increased, and high-temperature heat can be recovered. b. When recovering heat from steam using a heat exchanger,
As shown in (1), the heat transfer coefficient can be increased, and the heat exchanger becomes compact and economical.
【００１２】２）溶融スラグがスラグ供給管に充満する
こと無く流れるように、例えばスラグ供給管に十分な断
面積を持たせることにより、スラグ供給量が変動して
も、閉塞の虞がなく、安定した操業ができる。2) For example, by providing the slag supply pipe with a sufficient cross-sectional area so that the molten slag flows without filling the slag supply pipe, even if the slag supply amount fluctuates, there is no danger of clogging. Stable operation is possible.
【００１３】なお、スラグ供給管の断面積を小さくし、
吸引排気風量を小さくするため、溶融スラグの流速が速
くなるように、スラグ供給管は傾斜して設置することが
望ましい。[0013] The cross-sectional area of the slag supply pipe is reduced,
In order to reduce the amount of suction and exhaust air, the slag supply pipe is desirably installed at an angle so that the flow rate of the molten slag increases.
【００１４】３）スラグ冷却層を大気圧で稼働させれる
ことにより、ボイラまたは圧力容器の規格の適用を受け
ず、安価な設備となる。また、高炉等の関連設備の操業
に悪影響を及ぼすことことがない。 ４）発生する廃蒸気から、主にその潜熱を回収すること
により、温排水から熱を回収する場合に比べ、高温で高
い熱回収効率が達成できる。3) By operating the slag cooling layer at atmospheric pressure, the standard of the boiler or the pressure vessel is not applied, and the equipment becomes inexpensive. In addition, there is no adverse effect on the operation of related equipment such as a blast furnace. 4) By recovering the latent heat mainly from the generated waste steam, higher heat recovery efficiency can be achieved at a higher temperature than when recovering heat from warm wastewater.
【００１５】[0015]
【実施例】本発明方法を実施するための装置のフローシ
ートの一例を図１に示す。FIG. 1 shows an example of a flow sheet of an apparatus for carrying out the method of the present invention.
【００１６】高炉から排出された溶融スラグ１は、傾斜
して設けられたスラグ供給管２に導かれる。スラグ供給
管２はスラグが充満せずに流れるだけの十分な断面積を
持っている。The molten slag 1 discharged from the blast furnace is guided to an inclined slag supply pipe 2. The slag supply pipe 2 has a sufficient sectional area for the slag to flow without being filled.
【００１７】溶融スラグ１は、スラグ供給管２の途中に
設けられた冷却水噴射ノズル５から噴射された冷却水と
混合し、上端が大気に通じているスラグ冷却槽６に導か
れる。溶融スラグと冷却水は混合、直接熱交換され、ス
ラグは冷却され、冷却水は７０〜９０℃程度の温排水と
なり、同時に大気圧の廃蒸気が発生する。The molten slag 1 mixes with cooling water injected from a cooling water injection nozzle 5 provided in the middle of the slag supply pipe 2 and is guided to a slag cooling tank 6 whose upper end communicates with the atmosphere. The molten slag and the cooling water are mixed and directly heat-exchanged, the slag is cooled, and the cooling water becomes hot waste water of about 70 to 90 ° C., and at the same time, waste steam at atmospheric pressure is generated.
【００１８】スラグ供給管２の途中には吸引排気口３が
設けられている。スラグ供給管２の入口から吸込まれた
空気は、吸引排気口３からブロワ４により放散管９を経
て大気へ放出される。そのため、スラグ冷却槽６内の廃
蒸気に空気が混入することはない。また、スラグ冷却槽
６からスラグ供給管２を逆流する廃蒸気も、同様に吸引
排気口３からブロワ４により放散管９に放出され、スラ
グ供給管２の入口から周囲に噴出することはない。な
お、この例では積極的にブロワ４を設けているが、排気
煙突のドラフト効果を利用してもよい。スラグ冷却槽６
の下部から、スラグと温排水は脱水機８に導かれ、脱水
され、水砕スラグ１０として取出される。In the middle of the slag supply pipe 2, a suction / exhaust port 3 is provided. The air sucked from the inlet of the slag supply pipe 2 is discharged from the suction / exhaust port 3 to the atmosphere via the diffusion pipe 9 by the blower 4. Therefore, air does not mix with the waste steam in the slag cooling tank 6. Further, waste steam flowing backward from the slag cooling tank 6 through the slag supply pipe 2 is similarly discharged from the suction / exhaust port 3 to the diffusion pipe 9 by the blower 4 and does not blow out from the inlet of the slag supply pipe 2 to the surroundings. In this example, the blower 4 is positively provided, but the draft effect of the exhaust chimney may be used. Slag cooling tank 6
From the lower part of the slag, the slag and hot waste water are led to a dehydrator 8, dewatered, and taken out as granulated slag 10.
【００１９】一方、温排水１１は温水槽１２に入る。そ
こから、ポンプ１３で冷却塔１４に送られ、５０℃前後
に冷却され、冷却水槽１５に貯留される。そして、ポン
プ１６により、再び冷却水ノズル５に供給され、循環使
用される。On the other hand, the hot waste water 11 enters the hot water tank 12. From there, it is sent to a cooling tower 14 by a pump 13, cooled to about 50 ° C., and stored in a cooling water tank 15. Then, the water is again supplied to the cooling water nozzle 5 by the pump 16 and is circulated.
【００２０】スラグ冷却槽６の中には熱交換器１７が設
けられている。ポンプ１９により、熱交換器１７の伝熱
管内に供給された水は、スラグ冷却槽６の中の廃蒸気と
熱交換し凝縮熱を得る。高温となった水は第二種吸収式
ヒートポンプ１８の再生器と蒸発器に熱を供給し、再び
ポンプ１９により、循環される。凝縮しなかった余剰蒸
気は放散管９を通って大気に放出される。A heat exchanger 17 is provided in the slag cooling tank 6. Water supplied into the heat transfer tube of the heat exchanger 17 by the pump 19 exchanges heat with waste steam in the slag cooling tank 6 to obtain condensation heat. The high temperature water supplies heat to the regenerator and evaporator of the second type absorption heat pump 18 and is circulated again by the pump 19. Excess steam that has not been condensed is released to the atmosphere through the diffusion tube 9.
【００２１】ポンプ２２により、第二種吸収式ヒートポ
ンプ１８に供給された温水は、その吸収器で熱を与えら
れ、フラッシュタンク２０に入る。制御弁２１をとおし
て高温蒸気２３が取出される。次に、具体例について説
明する。The hot water supplied to the second type absorption heat pump 18 by the pump 22 is given heat by the absorber and enters the flash tank 20. High temperature steam 23 is taken out through control valve 21. Next, a specific example will be described.
【００２２】１チャージ約１００分間に、大略４００ト
ンの溶融スラグと、約６０℃の冷却水４０００トンが水
砕製造装置に供給され、水砕スラグが製造された。同時
に、スラグ冷却槽６で生じた廃蒸気を熱源に、第二種吸
収式ヒートポンプ１８を用いて昇温し、フラッシュタン
ク２０から、圧力１．５kg／cm2 Ｇの水蒸気を平均２６
トン／ｈ発生させることができた。In about 100 minutes per charge, approximately 400 tons of molten slag and 4000 tons of cooling water at about 60 ° C. were supplied to a granulating apparatus to produce granulated slag. At the same time, the temperature of the waste steam generated in the slag cooling tank 6 was raised using a second-class absorption type heat pump 18 using the waste steam as a heat source, and the pressure was 1.5 kg / cm 2 from the flash tank 20. G water vapor average 26
Ton / h could be generated.
【００２３】なお、上記第１の実施例では、スラグ冷却
槽内に熱交換器を設け、温水を熱媒体として廃蒸気の凝
縮熱を回収し、第二種吸収式ヒートポンプの再生器と蒸
発器の入熱とした。In the first embodiment, a heat exchanger is provided in the slag cooling tank, the heat of condensation of the waste steam is recovered using hot water as a heat medium, and the regenerator and evaporator of the second-class absorption heat pump are used. Heat input.
【００２４】第２の実施例として、スラグ冷却槽内に熱
交換器を設けず、吸引ブロワを使用して、廃蒸気を第二
種吸収式ヒートポンプの再生器と蒸発器に直接導き、入
熱として用いることで、同様の結果を得た。As a second embodiment, no heat exchanger is provided in the slag cooling tank, and the waste steam is directly led to the regenerator and evaporator of the second-class absorption heat pump using a suction blower. , Similar results were obtained.
【００２５】[0025]
【発明の効果】本発明の方法により、高炉の溶融スラグ
を良質の水砕スラグとして資源化すると同時に、高温で
多量の排熱を回収することができる。According to the method of the present invention, the molten slag from the blast furnace can be recycled as high-quality granulated slag, and a large amount of waste heat can be recovered at a high temperature.
【図１】本発明の一実施例で使用された装置の概略を示
すフローシート。FIG. 1 is a flow sheet schematically showing an apparatus used in one embodiment of the present invention.
【図２】空気混入量と廃蒸気温度との関係を示す説明
図。FIG. 2 is an explanatory diagram showing a relationship between an air mixing amount and a waste steam temperature.
【図３】蒸気への空気混入量と蒸気の凝縮熱伝達係数と
の関係を示す説明図。FIG. 3 is an explanatory diagram showing the relationship between the amount of air mixed into steam and the condensation heat transfer coefficient of steam.
１…溶融スラグ，２…スラグ供給管，４…吸引排気ブロ
ワ、６…スラグ冷却槽、１０…水砕スラグ、１７…熱交
換器、１８…第二種吸収式ヒートポンプ、２３…蒸気。DESCRIPTION OF SYMBOLS 1 ... Molten slag, 2 ... Slag supply pipe, 4 ... Suction exhaust blower, 6 ... Slag cooling tank, 10 ... Granulated slag, 17 ... Heat exchanger, 18 ... Second-class absorption heat pump, 23 ... Steam.
Claims (2)
水を噴射して急冷却し水砕スラグを製造する共に、直接
熱交換により発生する排熱を回収する方法において、 上記スラグ冷却槽を大気圧で稼働させると共に、上記溶
融スラグをスラグ供給管を介して上記スラグ冷却槽に供
給する際に、該溶融スラグが上記スラグ供給管に充満す
ること無く流れるようにすると共に、上記スラグ供給管
の途中に吸引排気部を設けて、上記直接熱交換により発
生する蒸気から熱交換器により熱を回収するようにした
ことを特徴とする高炉スラグからの熱回収方法。1. A method for producing water granulated slag by rapidly cooling water by injecting water into a molten slag of a blast furnace or the like in a slag cooling tank and recovering waste heat generated by direct heat exchange. When the molten slag is supplied to the slag cooling tank via the slag supply pipe, the molten slag is allowed to flow without filling the slag supply pipe, and the slag supply is performed. A method for recovering heat from blast furnace slag, wherein a suction / exhaust section is provided in the middle of a pipe to recover heat from a steam generated by the direct heat exchange by a heat exchanger.
きに傾斜している請求項１に記載の熱回収方法。2. The heat recovery method according to claim 1, wherein the slag supply pipe is inclined downward toward the slag cooling tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4115928A JP2757679B2 (en) | 1992-05-08 | 1992-05-08 | Heat recovery method from blast furnace slag |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4115928A JP2757679B2 (en) | 1992-05-08 | 1992-05-08 | Heat recovery method from blast furnace slag |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05311214A JPH05311214A (en) | 1993-11-22 |
| JP2757679B2 true JP2757679B2 (en) | 1998-05-25 |
Family
ID=14674663
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4115928A Expired - Fee Related JP2757679B2 (en) | 1992-05-08 | 1992-05-08 | Heat recovery method from blast furnace slag |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2757679B2 (en) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100419167B1 (en) * | 2001-08-27 | 2004-02-18 | 재단법인 포항산업과학연구원 | System for High Temperature Waste Heat Recovery from Molten Slag in Cooling Process |
| KR100391562B1 (en) * | 2001-08-27 | 2003-07-12 | 재단법인 포항산업과학연구원 | Steam production system using molten slag sensible heat |
| KR100896580B1 (en) * | 2002-11-15 | 2009-05-07 | 주식회사 포스코 | Apparatus for recovering sensible heat from molten slag |
| US8764439B2 (en) | 2009-05-12 | 2014-07-01 | Niigata University | Device for recovering heat of molten slag |
| CN102221198B (en) * | 2010-08-19 | 2013-11-13 | 西安交通大学 | Low NOx combustion method for cyclone furnace and liquid state slagging and afterheat recycling system for cyclone furnace |
| KR101159594B1 (en) * | 2010-10-27 | 2012-06-27 | 현대제철 주식회사 | Apparatus for waste heat recovery of furnace slag |
| KR102083873B1 (en) | 2018-05-10 | 2020-03-03 | 재단법인 포항산업과학연구원 | Apparatus for recovering heat of melthing slag |
| CN109402311A (en) * | 2018-12-27 | 2019-03-01 | 中冶京诚工程技术有限公司 | Environment-friendly white-removing treatment and waste heat utilization system for blast furnace slag |
| CN111020078B (en) * | 2019-12-04 | 2020-11-10 | 西安交通大学 | Slag falling pipe fixing device with preheating and cooling functions |
| KR102393081B1 (en) | 2020-06-17 | 2022-05-03 | 재단법인 포항산업과학연구원 | Apparatus for injecting of melthing slag |
| CN112029943A (en) * | 2020-09-28 | 2020-12-04 | 武汉工程大学 | Equipment for blast furnace dehumidification and blast by using blast furnace slag flushing water |
-
1992
- 1992-05-08 JP JP4115928A patent/JP2757679B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH05311214A (en) | 1993-11-22 |
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