WO2009031367A1 - Four vertical - Google Patents

Four vertical Download PDF

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Publication number
WO2009031367A1
WO2009031367A1 PCT/JP2008/063074 JP2008063074W WO2009031367A1 WO 2009031367 A1 WO2009031367 A1 WO 2009031367A1 JP 2008063074 W JP2008063074 W JP 2008063074W WO 2009031367 A1 WO2009031367 A1 WO 2009031367A1
Authority
WO
WIPO (PCT)
Prior art keywords
furnace
guide member
straight cylinder
conical guide
raw fuel
Prior art date
Application number
PCT/JP2008/063074
Other languages
English (en)
Japanese (ja)
Inventor
Yasuhiko Omatsu
Akihiko Shinotake
Kazushi Akagi
Masaaki Naito
Jun Tsubota
Zen-Etsu Kikuchi
Shin Murase
Hans Jaan Lachner
Michel Lemperle
Original Assignee
Nippon Steel Corporation
Kuettner Gmbh & Co. Kg
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Nippon Steel Corporation, Kuettner Gmbh & Co. Kg filed Critical Nippon Steel Corporation
Priority to EP08778301A priority Critical patent/EP2202323A4/fr
Publication of WO2009031367A1 publication Critical patent/WO2009031367A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B1/00—Shaft or like vertical or substantially vertical furnaces
    • F27B1/10—Details, accessories, or equipment peculiar to furnaces of these types
    • F27B1/20—Arrangements of devices for charging
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B11/00—Making pig-iron other than in blast furnaces
    • C21B11/02—Making pig-iron other than in blast furnaces in low shaft furnaces or shaft furnaces
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B13/00—Making spongy iron or liquid steel, by direct processes
    • C21B13/0006—Making spongy iron or liquid steel, by direct processes obtaining iron or steel in a molten state
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B7/00—Blast furnaces
    • C21B7/18—Bell-and-hopper arrangements
    • C21B7/20—Bell-and-hopper arrangements with appliances for distributing the burden
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
    • C21C5/56—Manufacture of steel by other methods
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B1/00—Shaft or like vertical or substantially vertical furnaces
    • F27B1/10—Details, accessories, or equipment peculiar to furnaces of these types
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D3/00—Charging; Discharging; Manipulation of charge
    • F27D3/0025—Charging or loading melting furnaces with material in the solid state
    • F27D3/0027—Charging vertically with corbs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D3/00—Charging; Discharging; Manipulation of charge
    • F27D3/0033—Charging; Discharging; Manipulation of charge charging of particulate material
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D3/00—Charging; Discharging; Manipulation of charge
    • F27D3/10—Charging directly from hoppers or shoots

Definitions

  • the present invention is provided with a charging device for separately charging raw fuels having different properties above the top of the furnace, and clarifying the raw fuel separately charged at the top of the furnace.
  • the present invention relates to a vertical furnace including a straight cylinder that partitions a deposition region.
  • pig iron is produced by melting iron sources such as iron scrap, porcelain scrap, pig iron and the like in a vertical furnace (cubora). In this type of vertical furnace, there is no reduction, so there is no need to produce reducing gas at the tuyere, and the coke is burned to secure a heat source necessary for raising or melting the raw fuel.
  • Japanese Patent Laid-Open No. 10-0 3 6 9 0 6 discloses that an iron source that needs to be reduced, an iron source that only needs to be melted, and a solid fuel are charged into a vertical furnace and provided on the furnace wall.
  • an operation method in which the following oxygen-enriched air is blown from the tuyere at room temperature or 600 ° C. to reduce and dissolve is it optimal for reduction and dissolution based on the average metallization rate of the iron source? ?
  • An operation method has been proposed in which the CQ (gas utilization factor) is obtained and the? 7 CQ of the exhaust gas is adjusted to the optimum range by adjusting the furnace height of the charge.
  • the weight ratio of C in the solid fuel to Fe in the iron source must be between 0.01 and 0.05.
  • the operation method proposed in Japanese Patent Application Laid-Open No. 10-0 3 6 90 6 is an operation method that has many control factors and is difficult to employ in actual operation.
  • Japanese Patent Laid-Open Nos. 0-9-2 0 3 5 8 4 and 3 5 8 6 3 5 5 disclose that the solid fuel combustion efficiency 7? E () is not lowered and shelves are avoided.
  • a raw fuel charging method and a raw fuel charging device have been proposed for the purpose of performing operations efficiently and stably for a long period of time.
  • the raw fuel charging method proposed in Japanese Patent Laid-Open No. 0-9-2 0 3 5 8 4 uses self-reducing ores, dust agglomerates, iron sources such as iron scrap, and raw fuels such as small solid fuel.
  • the weight ratio of the iron source Z solid fuel is changed for each charging charge, and the charging is performed separately for the furnace periphery and the furnace center.
  • Japanese Laid-Open Patent Publication No. 09-203-584 describes a charging mode in which raw fuel is charged by using a charging guide and dividing it into a furnace peripheral part and a furnace central part. (See Fig. 3), however, when the charged raw fuel is deposited on the existing raw fuel, it flows to the periphery of the furnace or the center of the furnace, and does not necessarily deposit in a predetermined area. The desired effect may not be obtained.
  • the raw fuel charging device proposed in Japanese Patent No. 3 5 8 6 3 5 5 is divided into a conical bell and a plurality of portions in the radial direction, and the lower portion is tapered to have a discharge port at the bottom.
  • Equipped with a horizontally movable raw fuel guide member that selectively feeds raw fuel into the furnace center and around the furnace, but the raw fuel that has passed through the guide device When depositing on the raw fuel, it flows to the periphery of the furnace or the center of the furnace, and does not necessarily deposit in the specified area, and the desired effect may not be obtained.
  • the divided raw fuel is simply charged, so the divided raw fuel does not accumulate in a predetermined region.
  • the combustion efficiency of solid fuel 7? E Q does not decrease, and the operation is carried out efficiently and stably for a long period of time, avoiding shelf suspension. It becomes difficult. Disclosure of the invention
  • the present invention separately charges the raw fuel according to the properties from the top of the furnace.
  • the task is to deposit the raw fuel that has been introduced in a predetermined area as intended.
  • the purpose is to provide a vertical furnace.
  • the present inventors have provided a gas suction port in the peripheral wall of the furnace top, and in a vertical furnace that operates with the raw fuel in the furnace area above the gas suction port sealed and operated,
  • the means that focus only on the raw fuel charging mode solves the problem.
  • a steel straight cylinder is provided in the sealing zone at the top of the furnace to define the raw fuel deposition area, and (ii) above the furnace top, in cooperation with the steel straight cylinder.
  • a raw fuel charging device is provided for dividing and charging raw fuels having different properties into and out of the steel straight cylinder, and the divided raw fuel is appropriately loaded into and out of the steel straight cylinder. If so, is the solid fuel combustion efficiency? It was found that the furnace operation can be carried out efficiently and stably over a long period of time without lowering the CQ and avoiding hanging from the shelf.
  • the present invention has been made on the basis of the above findings, and the gist thereof is as follows.
  • the steel top cylinder defining the accumulation region of the charged raw fuel is provided in the sealing zone at the top of the furnace, and
  • a raw fuel charging device is provided above the top of the furnace in cooperation with the above steel straight cylinder and charging raw fuels having different properties into the inside and outside of the steel straight cylinder.
  • the vertical furnace according to (1) above characterized in that: (3) The vertical furnace according to (2), wherein the attaching / detaching mechanism is driven according to a raw fuel charging schedule.
  • the attachment / detachment mechanism rotates the conical guide member and the inverted conical guide member to move from the retracted position directly above the steel straight cylinder in a vertical plane around the fulcrum set on both sides of the furnace top.
  • the attaching / detaching mechanism rotates and moves the conical guide member and the inverted conical guide member from the retracted position directly above the steel straight cylinder in a horizontal plane around a fulcrum set on both sides or one side of the furnace top.
  • the attachment / detachment mechanism includes a reciprocating mechanism for reciprocating a long structural member mounted on both ends of the conical guide member and the inverted conical guide member in a horizontal plane with the furnace top interposed therebetween.
  • a vertical furnace capable of efficiently and stably performing a furnace operation for a long period of time without lowering the solid fuel combustion efficiency 7 e Q and avoiding shelf hanging.
  • FIG. 1 is a view showing an embodiment of a vertical furnace (invention furnace) according to the present invention.
  • FIG. 2 is a diagram showing a charging mode in which the attachment / detachment mechanism is driven and the inverted conical guide member or the conical guide member is placed above the steel straight cylinder.
  • (A) shows the charging mode with the inverted conical guide member placed above the steel straight cylinder
  • (b) shows the charging mode with the conical guide member placed above the steel straight cylinder. .
  • Fig. 3 is a diagram schematically showing the state of raw fuel accumulation in the vertical furnace.
  • Fig. 1 shows an embodiment of the vertical furnace (the present invention furnace) according to the present invention in which the raw fuel is not charged in the furnace.
  • the vertical furnace 1 basically includes a furnace body 2 having an upper tuyere 6 a and a lower tuyere 6 b at the lower part, and an upper part of the furnace body 2.
  • the gas suction part 4 is provided in the gas suction part 4 and the furnace top part 3 is provided so as to penetrate through the gas suction part 4 and seal the upper part of the furnace body 1 with raw fuel (not shown) accommodated therein. .
  • the furnace top 3 is made of a steel shell, but the outside of the portion inserted into the gas suction part 4 is covered with a refractory.
  • the tuyere is basically a force that provides two stages of upper tuyere 6a and lower tuyere 6b in the height direction of the furnace.
  • the lower tuyere 6 b is provided at a height position within the coke bed 20.
  • the tuyere diameter is set so that the blowing speed is slower than the blast furnace so that the raceway is not created at the tuyere.
  • the present invention is not limited to a two-stage tuyere, and can be performed with a single-stage tuyere depending on the air blowing conditions.
  • the lower tuyere 6 blows in air at room temperature or 600 ° C or lower, mainly burning the coke.
  • air at room temperature is blown from the upper tuyere 6 a to burn the CO gas generated by the combustion loss reaction (endothermic) of some combustion gases (co 2 ) and coke, Compensation for decrease in heat of fusion of iron source due to solution loss reaction (endothermic).
  • the lower tuyere When the first stage tuyere is blown, the lower tuyere is installed at the same height as the lower tuyere 6 b to promote the combustion of coke and increase the heat of fusion of the iron source. It is necessary to enrich oxygen in the air blown from 6b at room temperature or 600 ° C or lower, and increase the oxygen concentration.
  • the raw fuel to be reduced or dissolved in the vertical furnace 1 is cut out from each raw material hopper (not shown), weighed by a weighing device (not shown), and then put into a baguette 9 as a charging device. It is accommodated and carried above the top 3 of the furnace, and from the top 3 of the vertical furnace 1 via the packet 9, onto the cox bed 8 formed at the bottom of the vertical furnace 1, The solid fuel and the iron source are charged in a layered or mixed state.
  • a small-diameter carbonaceous solid fuel is used, but a large amount of small-diameter coke (blast furnace coke) is mainly used.
  • raw materials hot briguet reduced iron (MBI), direct reduced iron (DRI), iron scraps, molds and other iron sources that only need to be dissolved, self-reducing ores (including C agglomerates), Use an iron source that requires reduction, such as reduced iron with a low metallization rate.
  • a steel straight cylinder 7 whose lower end extends to the vicinity of the upper end of the gas suction part 4 is supported by a straight cylindrical support member 8 inside the furnace top part 3.
  • Raw fuel with different properties accumulates inside and outside the cylinder 7.
  • a steel straight cylinder is attached inside the top of the furnace, which is a structural feature for efficient and stable operation over a long period of time.
  • the straight steel cylinder is preferably made of stainless steel with excellent wear resistance.
  • the opening area of the steel straight cylinder is set according to the ratio of the amount of raw fuel charged separately inside and outside the steel straight cylinder 7.
  • the steel straight cylinder is attached to the inside of the furnace top portion 3 with a straight cylinder support member 8, and can be appropriately replaced.
  • the combustion efficiency of solid fuel 77 e Q is not reduced, and shelf operation is avoided by avoiding shelf hanging.
  • the raw fuel is divided according to the properties, and charged and deposited inside and outside the steel straight cylinder.
  • an iron source that requires only melting, or the iron source and solid fuel (hereinafter sometimes referred to as “melting raw fuel”) is charged into a steel straight cylinder 7 and deposited.
  • the iron source that needs to be reduced, or the iron source and solid fuel (hereinafter sometimes referred to as “reducing raw fuel”) are charged between the inner circumference of the furnace top and the steel straight cylinder 7. And deposit.
  • FIG. 1 shows an inverted conical induction member 10 for charging raw raw fuel into the steel straight cylinder 7 in cooperation with the steel straight cylinder 7 attached to the inside of the furnace top 3. .
  • the inverted conical guide member 10 is provided with an opening having a diameter substantially the same as the diameter of the steel straight cylinder 7 at the bottom, so that the raw melt fuel contained in the bucket 9 is Passing through the bottom opening of the inverted conical guide member 10, the steel straight cylinder 7 is charged and deposited.
  • Fig. 1 shows the conical guide member used for charging the reducing raw fuel between the inner circumference of the top of the furnace and the steel straight cylinder 7 1 1
  • the force is retracted to the retracted position.
  • the inverted conical guide member 10 and the conical guide member 11 are placed above the steel straight cylinder 7 from the retracted position by the attachment / detachment mechanism according to the raw fuel charging schedule.
  • the conical guide member 11 has a bottom portion that is large enough to fit within the furnace top, and a conical bottom portion having a bottom surface substantially the same diameter as the diameter of the steel straight cylinder 7 is formed at the center thereof.
  • An opening through which raw fuel passes is formed in Fig. 2.
  • a charging state in which a material or a conical guide member is placed above a steel straight cylinder is shown.
  • Fig. 2 (a) shows the charging mode with the inverted conical guide member placed above the steel straight cylinder
  • Fig. 2 (b) shows the setup with the conical guide member placed above the steel straight cylinder.
  • An entry mode is shown.
  • a guide member holding frame 14 for holding the inverted conical guide member 10 and the conical guide member 11 on the base 18 provided on the work floor.
  • Rotating shaft fixing member 1 6 for fixing the rotating shaft 1 5, a hydraulic mechanism 1 2 connected to the vicinity of the rotating shaft 1 5 of the guiding member holding frame 1 4, and an inverted conical guiding member 1 0 or cone When the cylindrical guide member 11 is placed on the upper part of the steel straight cylinder 7, support members 17 that support both ends of the guide member holding frame 14 are arranged.
  • a weight 13 for smoothly rotating the guide member holding frame 14 by the hydraulic mechanism 12 is attached to one end portion of the guide member holding frame 14.
  • Fig. 2 (a) shows the inverted conical guiding member 10 0 force placed at the top 3 of the furnace above the steel straight cylinder 7, retracted to the conical guiding member 1 1 force retracted position, and the packet (not shown) The bottom part of the steel is opened, and the raw material fuel X is inserted into the steel straight cylinder 7.
  • the hydraulic mechanism 12 When the required amount of raw melt fuel X has been charged, the hydraulic mechanism 12 is driven, and as shown in Fig. 2 (b), the inverted conical guiding member 10 is retracted to the retracted position, and the conical guiding is performed.
  • the member 11 is placed above the straight cylinder 7 made of steel, the bottom of the packet (not shown) that stores the reducing raw fuel Y is opened, and the charging of the reducing raw fuel Y is started.
  • the hydraulic mechanism 1 2 Since the hydraulic mechanism 1 2 is configured to be controlled by a hydraulic mechanism control device (not shown), the hydraulic mechanism 1 2 is driven according to the raw fuel charging schedule to start operation and during operation.
  • Raw fuels with different properties (dissolved raw fuel X and reduced raw fuel Y) Insert into the zone (inside and outside of the steel cylinder 7). This is a feature of the furnace of the present invention.
  • a conical induction member and an inverted conical induction member are used to rotate the steel straight from the retraction position within the vertical plane around the rotation shafts (fulcrum points) set on both sides of the furnace top.
  • the rotating mechanism is shown in which it is moved directly above the cylinder and placed.
  • the placement and withdrawal of the conical guiding member and the inverted conical guiding member are not limited to this rotating mechanism.
  • the rotation mechanism may be a rotation mechanism that rotates and moves the conical guide member and the inverted conical guide member from the retracted position to the top of the right cylinder around the fulcrum set on both sides or one side of the furnace top. .
  • the attachment / detachment mechanism may include a reciprocating mechanism that reciprocates a long structural member placed on both ends of the conical guide member and the inverted conical guide member in a horizontal plane with the furnace top interposed therebetween.
  • it may be provided with a reciprocating mechanism for reciprocating the carriage on which the conical guide member and the inverted conical guide member are placed with the furnace top interposed therebetween.
  • Fig. 3 shows the state of deposition of dissolved raw fuel X and reducing raw fuel Y inside the vertical furnace in operation.
  • raw fuel is deposited on the top 3 of the furnace located above the gas suction part, and by this deposition, a sealing band is formed on the top of the furnace to seal the top of the furnace. ”) To operate.
  • the iron source in the raw fuel charged from above the top of the vertical furnace 1 is dissolved by the combustion heat of coke (C) due to oxygen in the air blown from the tuyere while descending the furnace.
  • Iron oxide partially contained in the iron source is reduced with reducing gas (CO), solid carbon (C) or carbon in hot metal (C), and further drops coke bed 20 Accumulate at the bottom of the furnace.
  • the level of the top surface of the bottom of the bottom of the furnace bottom is the storage level provided outside the furnace.
  • the smelting reduction region where the iron source is melted and partially reduced mainly consists of a range in the furnace height direction of about 1 to 2.5 m above the surface of the coke bed 8 (bucket). (Equivalent to approximately 1 to 2.5 charges of raw fuel contained in the fuel 7).
  • the raw fuel Even if the raw fuel is classified into the vertical furnace according to the properties and charged into the specified area, it will flow into other areas or fall down inside the furnace due to collision with existing deposited raw fuel. If mixed and lowered during the process, the raw fuel for reduction may not be reduced, or it may be suspended from the shelf and air permeability will deteriorate, resulting in a situation where the raw material for dissolution does not dissolve sufficiently.
  • the molten raw fuel X and the reduced raw fuel Y charged separately inside and outside the steel straight cylinder 7 are accumulated without intermixing with each other inside and outside the steel straight cylinder 7. So, during operation, it descends without intermingling with each other. That is, the molten raw fuel X and the reduced raw fuel Y form a downward flow without interfering with each other inside and outside the steel straight cylinder 7.
  • the stack height (stock level) of the raw fuel inside and outside the steel cylinder decreases as the dissolved raw fuel X and reduced raw fuel Y fall during operation. For this reason, in order to stably melt the raw fuel while sealing the top 3 of the furnace, it is measured with a level meter (not shown) attached to the top 3 of the furnace, and the stack height level (stock level) of the raw fuel is measured. To control the raw fuel charging timing so that the fuel is maintained at a predetermined level.
  • the conditions of the examples are one example of conditions adopted to confirm the feasibility and effects of the present invention, and the present invention is based on this one example of conditions. It is not limited.
  • the present invention can adopt various conditions as long as the object of the present invention is achieved without departing from the gist of the present invention.
  • the average metallization rate M is
  • the composition of the raw fuel charged in the center and the periphery is changed, and in the center there is no need for reduction.
  • Invention Example 1 in which a dust pellet that is reduced and has a small solid size is charged in the periphery, the iron source is supplied using solid fuel containing 100% by mass of blast furnace coke. When melting, keep the average furnace wind pressure at a stable operating level, minimize the number of wind reductions and pauses due to wind pressure rise, maintain high productivity throughout the period, and produce hot metal I was able to.
  • Comparative Example 1 operated under the same air blowing conditions as Invention Example 1, the average furnace wind pressure became high, the operation became unstable due to the increase in wind pressure, and there was a situation where it was forced to reduce or stop wind. It occurred at a high frequency and productivity decreased over the period.
  • Comparative Example 2 which aimed at more stable operation by lowering the average furnace pressure, it was forced to operate with a lower air flow per hour than in Inventive Example 1, so compared with Comparative Example 1. Although the frequency of unavoidable operation due to the increase in wind pressure has decreased, the productivity during the period has become much lower than in Invention Example 1 due to the decrease in dissolution speed. is there.
  • the furnace operation can be efficiently and stably performed for a long period of time without lowering the solid fuel combustion efficiency 7 e D and avoiding the shelf suspension.
  • a vertical furnace can be provided. Therefore, the present invention has great applicability in the steel manufacturing industry.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)
  • Manufacture Of Iron (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)

Abstract

L'invention porte sur un four vertical comprenant un orifice d'aspiration de gaz disposé dans sa paroi périphérique à une partie supérieure du four, conçu pour effectuer une opération avec des matières premières et des combustibles déposés dans une zone intra-four au-dessus de l'orifice d'aspiration de gaz tout en fermant la partie supérieure du four. Le four vertical est caractérisé par le fait que (i) la partie supérieure du four, à sa zone de fermeture, est pourvue d'un cylindre droit réalisé en acier, destiné à séparer des régions de dépôt pour des matières premières et des combustibles chargés, et (ii) au-dessus de la partie supérieure du four, est disposée une unité de chargement de matière première et de combustible, destinée à diviser des matières premières et des combustibles ayant différentes propriétés et à les charger séparément dans des zones à l'intérieur et à l'extérieur du cylindre droit en coopération avec le cylindre droit.
PCT/JP2008/063074 2007-09-07 2008-07-14 Four vertical WO2009031367A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP08778301A EP2202323A4 (fr) 2007-09-07 2008-07-14 Four vertical

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP2007233197 2007-09-07
JP2007-233197 2007-09-07
JP2008-177041 2008-07-07
JP2008177041A JP4308878B2 (ja) 2007-09-07 2008-07-07 竪型炉

Publications (1)

Publication Number Publication Date
WO2009031367A1 true WO2009031367A1 (fr) 2009-03-12

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PCT/JP2008/063074 WO2009031367A1 (fr) 2007-09-07 2008-07-14 Four vertical

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EP (1) EP2202323A4 (fr)
JP (1) JP4308878B2 (fr)
WO (1) WO2009031367A1 (fr)

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Publication number Priority date Publication date Assignee Title
CN101832706B (zh) * 2010-04-30 2012-05-23 攀枝花市创盛粉末冶金有限责任公司 外燃管式直接还原竖炉
CN101813412B (zh) * 2010-04-30 2011-09-14 攀枝花市创盛粉末冶金有限责任公司 用于竖炉的防粘布料方法及装置
CN104697321A (zh) * 2015-02-15 2015-06-10 德清县众合保温材料厂（普通合伙） 冲天炉用布料机构
CN104792150A (zh) * 2015-04-27 2015-07-22 乔治费歇尔汽车产品(昆山)有限公司 一种天然气冲天炉

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JPS59143009A (ja) * 1983-02-07 1984-08-16 Kawasaki Steel Corp 溶融還元炉の炭材装入装置
JPH09203584A (ja) 1996-01-26 1997-08-05 Nippon Steel Corp 竪型炉へのダスト塊成鉱、自己還元性鉱塊、鉄屑、固体燃料等の原燃料装入方法
JPH1036906A (ja) 1996-04-17 1998-02-10 Nippon Steel Corp 竪型炉の操業方法
JPH10267539A (ja) * 1997-03-25 1998-10-09 Nippon Steel Corp 竪型炉の装入装置
JPH10267538A (ja) * 1997-03-25 1998-10-09 Nippon Steel Corp 竪型炉の原燃料装入装置及びその方法

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Publication number Priority date Publication date Assignee Title
JPS58171520A (ja) * 1982-03-31 1983-10-08 Yoshida Tekkosho:Kk 低硫黄鋳鉄の製造方法
JPS59143009A (ja) * 1983-02-07 1984-08-16 Kawasaki Steel Corp 溶融還元炉の炭材装入装置
JPH09203584A (ja) 1996-01-26 1997-08-05 Nippon Steel Corp 竪型炉へのダスト塊成鉱、自己還元性鉱塊、鉄屑、固体燃料等の原燃料装入方法
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