WO2012053291A1 - Apparatus for producing molten metallic iron - Google Patents

Apparatus for producing molten metallic iron Download PDF

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Publication number
WO2012053291A1
WO2012053291A1 PCT/JP2011/070426 JP2011070426W WO2012053291A1 WO 2012053291 A1 WO2012053291 A1 WO 2012053291A1 JP 2011070426 W JP2011070426 W JP 2011070426W WO 2012053291 A1 WO2012053291 A1 WO 2012053291A1
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Prior art keywords
molten metal
metal iron
rotary hearth
furnace
slag
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PCT/JP2011/070426
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French (fr)
Japanese (ja)
Inventor
修 津下
耕司 徳田
小林　勲
宮原　逸雄
晶一 菊池
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株式会社神戸製鋼所
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Publication of WO2012053291A1 publication Critical patent/WO2012053291A1/en

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    • 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
    • F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/14—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment
    • F27B9/16—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving in a circular or arcuate path
    • 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
    • C21B13/00—Making spongy iron or liquid steel, by direct processes
    • C21B13/10—Making spongy iron or liquid steel, by direct processes in hearth-type furnaces
    • C21B13/105—Rotary hearth-type 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
    • C21B13/14—Multi-stage processes processes carried out in different vessels or furnaces
    • 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
    • F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/30—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
    • F27D11/00—Arrangement of elements for electric heating in or on furnaces
    • F27D11/06—Induction heating, i.e. in which the material being heated, or its container or elements embodied therein, form the secondary of a transformer
    • 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
    • F27D99/00—Subject matter not provided for in other groups of this subclass
    • F27D99/0001—Heating elements or systems
    • F27D99/0033—Heating elements or systems using burners
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/25—Process efficiency

Definitions

  • the present invention relates to a molten metal iron production apparatus for producing molten metal iron by supplying a raw material mixture containing at least a carbonaceous reducing agent and an iron oxide-containing substance to a rotary hearth furnace.
  • molten metal iron on the hearth separated from the slag is cooled by charging the raw material containing the carbonaceous reducing material and the iron oxide-containing material into the rotary hearth furnace and heating and reducing and melting at a high temperature.
  • a method for producing molten metal iron that is discharged out of the rotary hearth furnace and recovered without being solidified for example, see Patent Document 1).
  • FIG. 7 shows the hearth structure of a rotary hearth furnace used in the above method for producing molten metal iron
  • FIG. 7 (a) is a plan view
  • FIG. 7 (b) is an F of FIG. 7 (a).
  • FIG. 7F is a longitudinal sectional view taken along the arrow -F, and FIG.
  • Ma indicates a raw material supplied from the raw material supply device 50 onto the hearth 51.
  • Discharge ports 52 for discharging molten metal iron are arranged at regular intervals on a line passing through the center of the hearth width of the hearth 51, and inclined downward toward the discharge ports 52.
  • An inclined surface 53 is formed.
  • a slide valve 54 for discharging the molten metal iron Me is provided below the discharge port 52.
  • the discharged molten iron iron Me is directly received by a pan (not shown) arranged immediately below the discharge port 52, or collected in a pan arranged near the rotary hearth furnace through a firewood (not shown). And recovered.
  • 8 (a) and 8 (b) is the same in that the raw material Ma is supplied from the raw material supply device 50, but the floor of the hearth 60 is directed toward the center of the rotary furnace.
  • a fixed weir 61 having a height that prevents molten metal iron from overflowing along the inner peripheral side edge of the floor surface 60a is provided while the surface 60a is inclined downward.
  • This fixed weir 61 is partially cut away in the discharge area.
  • a mortar-shaped inclined surface 60a is formed toward a discharge port 60b provided at the center of the rotary furnace, and molten metal iron is discharged from a specific position (notch portion 61a). Yes.
  • the present invention has been made in consideration of the problems in the conventional hearth structure as described above.
  • the molten slag discharged from the rotary hearth furnace and the molten metal iron are separated and melted without going through a separate process.
  • An apparatus for producing molten metal iron capable of recovering only metal iron is provided.
  • the present invention has a rotary hearth composed of an inclined surface inclined downward toward the furnace center, and a discharge port provided in the furnace center, at least from a carbonaceous reducing agent and an iron oxide-containing substance.
  • a rotary hearth furnace in which the raw material mixture is charged on the rotary hearth, and the metal mixture and slag components are melted by reducing the charged raw material mixture;
  • the inclination angle of the inclined surface is preferably set within a range of 3 to 30 °.
  • an induction heating device can be provided as the heating means, an auxiliary burner can be provided as the heating means, and a combination of these can also be provided.
  • the rotary hearth furnace has a flooring material charging device for charging the flooring material, and is not discharged to the upstream side of the flooring material charging device in the rotation direction of the rotary hearth furnace.
  • a forced discharge device that forcibly guides at least one of molten metal iron and slag to the discharge port can be provided.
  • a water seal device for sealing a connecting portion between the rotating rotary hearth and the fixed melt container.
  • a recovery device for separating and recovering molten metal iron and slag in the melt container.
  • the raw material mixture containing a carbonaceous reducing agent and an iron oxide-containing substance in the present invention is a raw material molded body molded in a lump by a direct mixed powder of a carbonaceous reducing agent and an iron oxide-containing substance, or a press machine,
  • the shape of the raw material molded body is not particularly limited, and includes various shapes such as a lump shape, a granular shape, a briquette shape, a pellet shape, and a rod shape.
  • the auxiliary combustion burner means a burner that is auxiliaryly heated for the purpose of maintaining the temperature at which the molten metal iron stored in the melt container and the flow of the slag are promoted.
  • the molten slag and molten metal iron discharged together from the rotary hearth furnace are separated from the molten metal iron without going through a separate process, and the molten metal iron is separated. Only has the advantage that it can be recovered.
  • FIG. 2 is a cross-sectional view taken along arrow AA in FIG. 1.
  • (a) is an enlarged plan view of the forced discharge device shown in FIG. 1, and (b) is a side view of the forced discharge device viewed from the circumferential direction.
  • (a) is a plan view showing the hearth structure of a conventional rotary hearth furnace,
  • (b) is a vertical cross-sectional view taken along the line FF in FIG. 7 (a), and
  • (c) is an exhaust view shown in FIG. 7 (a).
  • (a) is a top view which shows another conventional hearth structure
  • (b) is the longitudinal cross-sectional view.
  • FIG. 1 is a longitudinal sectional view showing a schematic configuration of a rotary hearth furnace 1 constituting a molten metal iron manufacturing apparatus according to the present invention
  • FIG. 2 is a transverse sectional view taken along the line AA in FIG. .
  • the rotary hearth furnace 1 has a hearth (rotary hearth) 2 that rotates about a vertical axis Z.
  • a carbonaceous material Cf made of a granular carbonaceous material is spread on the hearth 2 from the floor covering material supply machine 3, and further, a raw material molded body Mf as a raw material mixture is continuously supplied from the raw material molding body supply machine 4. Supplied.
  • the floor covering material supply machine 3 and the raw material molded body supply machine 4 are each provided with a vibration feeder.
  • the carbonaceous material Cf can be evenly laid on the hearth 2, and the raw material molded body Mf is made of almost one layer of carbon. It can be laid on the material Cf.
  • the hearth surface can be protected, and it becomes possible to promote carburization of iron and operate at a lower temperature.
  • a part of the carbon material Cf is caused to flow down to the melt container 5 described later, there is an advantage that carburization can be promoted even in the melt container 5.
  • the hearth 2 rotates counterclockwise (arrow B direction) and, depending on the operating conditions, makes a round in about 10 to 20 minutes, during which a burner (shown in the figure) is provided on the furnace wall and top plate.
  • a burner shown in the figure
  • the iron oxide contained in the raw material molded body Mf is reduced by receiving the combustion heat or the radiant heat.
  • the hearth 2 has a downwardly inclined surface 2a inclined in a mortar shape toward the center of the furnace, and an outlet for discharging the melt Mx (molten iron oxide, molten slag) in a fluid state. 2b is provided in the furnace center.
  • the inclination angle of the inclined surface 2a is set within a range of 3 to 30 °, and a more preferable inclination angle is 10 to 25 °.
  • the tilt angle is less than 3 °, the molten metal iron and slag do not flow down naturally even when the molten metal is melted, and when the tilt angle exceeds 30 °, the raw material molded body Mf is supplied onto the hearth 2 at the point of time. This is because it does not stay above and rolls down toward the furnace center (discharge port 2b).
  • a melt container 5 is provided below the outlet 2b in communication with the outlet 2b.
  • the melt container 5 has a bottomed cylindrical shape, and is provided with at least one of an induction heating device 6 and an auxiliary burner 7 (see FIG. 4) along the outer wall of the trunk for the purpose of heat compensation of the stored matter. Has been.
  • the induction heating device 6 and the auxiliary burner 7 function as heating means attached to the melt container 5.
  • the raw material molded body Mf flows along the inclined surface 2a when melted and fluidized, and is collected in the discharge port 2b provided in the center of the furnace, and is put in the melt container 5. Fall.
  • the molten metal iron and the slag interact with each other, so that the desulfurization of the molten metal iron proceeds.
  • the flow of the melt Mx in the melt container 5 is promoted by being heated by the induction heating device 6, the separation of the molten metal iron and the slag proceeds, and the slag is formed on the surface of the molten metal iron. Is raised to form a layer.
  • reference numeral 8 denotes a forced discharge device (described later)
  • reference numeral 1 a denotes a partition wall hanging from the top plate of the rotary hearth furnace
  • reference numeral 1 b denotes a furnace wall.
  • connection part of the lower part of the fixed furnace wall 1b and the outer peripheral part of the rotating hearth 2 is sealed by the water seal apparatus 9 being interposed.
  • another water sealing device 9 ' is interposed and sealed at the connecting portion between the inner peripheral edge of the rotating hearth 2 and the upper part of the melt container 5 that is fixed (see FIG. 5).
  • FIG. 3 (a) is an enlarged plan view showing the forced discharge device 8
  • FIG. 3 (b) is a side view of the forced discharge device 8 seen from the circumferential direction of the hearth.
  • the forced discharge device 8 comprises rectangular strips 8a to 8d made of refractory, and these strips 8a to 8d are suspended from the top plate 1c of the rotary hearth furnace 1, A predetermined gap Lv is provided between the lower end serving as a free end and the hearth surface, which is provided continuously in the width direction.
  • the predetermined gap Lv is preferably increased stepwise toward the furnace center in consideration that the amount of the melt Mx to be discharged increases toward the center of the hearth 2.
  • the strips 8a to 8d are arranged in a stepped manner so as to sequentially retreat (in the rotation direction B) from the outer peripheral side to the inner peripheral side of the hearth 2. As shown in FIG. 3B, an overlap margin Lh is secured between the adjacent strips 8a to 8d.
  • any one or more of undischarged molten metal iron, molten slag, and flooring material can be forcibly guided to the discharge port 2b. Further, the hearth surface on the downstream side can be smoothed.
  • each strip 8a to 8d is provided with a lifting / lowering device 8e such as a hydraulic cylinder, and the rod is gradually extended to maintain the predetermined gap Lv. It is preferable that the predetermined gap Lv can be maintained by adding a band plate.
  • the forced discharge device 8 is provided as necessary or as a safety device when the melt Mx cannot be discharged, and can be omitted when the melt Mx smoothly flows to the discharge port 2b.
  • FIG. 4 is an explanatory view showing a configuration in which only the auxiliary burner 7 is attached to the melt container 5 as a heating means.
  • the auxiliary burner 7 is provided in a substantially horizontal direction on the upper part of the melt container 5 so that the flame is directed toward the center line of the melt container 5.
  • a slag discharge port 5a for discharging the slag is provided at a position lower than the attachment position of the auxiliary burner 7 in the melt container 5, and the molten metal iron discharge port 5b is provided at a position lower than the slag discharge port 5a.
  • FIG. 5 is an explanatory view showing the configuration of the recovery apparatus 10 that recovers molten metal iron Mi and slag S
  • FIG. 6 is a plan view thereof.
  • the recovery device 10 has a receiving rod 11 extending in the horizontal direction from the top of the melt container 5, and molten metal iron that discharges molten metal iron Mi to the lower surface of the tip of the receiving rod 11.
  • An outlet 11a is provided.
  • a bowl 13 that can be swung around a vertical axis.
  • a first molten metal pan 14 is arranged on one side of the range in which the bowl 13 turns, and the first is on the other side.
  • Two molten metal iron pans 15 are arranged.
  • the molten metal iron Mi discharged continuously can be alternately distributed to the first and second molten metal iron pans 14 and 15.
  • the melt container 5 provided with the induction heating device 6 functions as an induction heating furnace 16, and when the operation of the rotary hearth furnace 1 is stopped or the furnace repair of the induction heating furnace 16 is performed, the melt in the receiver 11 is melted. After extracting the metal iron Mi, the induction heating furnace 16 is separated from the connection portion C and lowered, and then tilted to discharge all the molten metal iron Mi in the induction heating furnace 16 to the third molten metal iron pan 17. To do.
  • connection part D In addition, about the receptacle 11, it can isolate
  • a slag stopper 11b is provided in the middle of the receiving 11.
  • the slag stopper 11b is configured to be movable up and down, and when the rotary hearth furnace 1 starts operation, the slag stopper 11b is lowered to the bottom surface of the receiving tray 11, and is configured to rise to a slag separation position shown in FIG. Has been. Thereby, the slag S is discharged from the slag discharge port 11c (see FIG. 6) and collected in the slag pot 12.
  • the present invention can be used in a manufacturing apparatus that separates molten slag and molten metal iron and collects only molten metal iron.

Abstract

The present invention provides an apparatus for producing molten metallic iron that can separate molten metallic iron from molten slag discharged from a rotary hearth furnace and collect only the molten metallic iron without having to perform an additional process, said apparatus characterized by comprising: a rotary hearth furnace (1) which has a rotary hearth (2) comprising an inclined surface (2a) inclining downwardly toward the center of the furnace and has an outlet (2b) disposed at the center of the furnace, the rotary hearth furnace (1) melting metallic iron and slag components by reducing a starting mixture that is formed of at least a carbonaceous reducing agent and an iron oxide-containing substance and is charged on the rotary hearth (2); a molten material container (5) which is disposed below the outlet (2b) and stores the metallic iron and slag components flowing down the inclined surface (2a); and an induction heating device (6) which is disposed in the molten material container (5).

Description

溶融金属鉄の製造装置Molten metal iron production equipment
　本発明は、少なくとも炭素質還元剤と酸化鉄含有物質を含む原料混合物を回転炉床炉に供給して溶融金属鉄を製造する溶融金属鉄の製造装置に関するものである。 The present invention relates to a molten metal iron production apparatus for producing molten metal iron by supplying a raw material mixture containing at least a carbonaceous reducing agent and an iron oxide-containing substance to a rotary hearth furnace.
　従来、炭素質還元材と酸化鉄含有物質からなる成形原料を回転炉床炉に装入し、高温で加熱して還元、溶融することにより、スラグと分離した炉床上の溶融金属鉄を、冷却、固化することなく溶融状態のまま回転炉床炉外に排出し回収する溶融金属鉄の製造方法が知られている（例えば、特許文献１参照）。 Conventionally, molten metal iron on the hearth separated from the slag is cooled by charging the raw material containing the carbonaceous reducing material and the iron oxide-containing material into the rotary hearth furnace and heating and reducing and melting at a high temperature. There is known a method for producing molten metal iron that is discharged out of the rotary hearth furnace and recovered without being solidified (for example, see Patent Document 1).
　図７は上記溶融金属鉄の製造方法に用いられる回転炉床炉の炉床構造を示したものであり、図７(ａ)は平面図、同図(ｂ)は図７(ａ)のＦ－Ｆ矢視縦断面図、図７(ｃ)は排出口の拡大縦断面図である。 FIG. 7 shows the hearth structure of a rotary hearth furnace used in the above method for producing molten metal iron, FIG. 7 (a) is a plan view, and FIG. 7 (b) is an F of FIG. 7 (a). FIG. 7F is a longitudinal sectional view taken along the arrow -F, and FIG.
　これらの図において、Ｍａは原料供給装置５０から炉床５１上に供給される原料を示している。 In these drawings, Ma indicates a raw material supplied from the raw material supply device 50 onto the hearth 51.
　炉床５１の炉床幅のほぼ中心を通る線上には一定間隔を空けて溶融金属鉄を排出するための排出口５２が配設されており、それらの排出口５２に向けて先下がりに傾斜する傾斜面５３が形成されている。 Discharge ports 52 for discharging molten metal iron are arranged at regular intervals on a line passing through the center of the hearth width of the hearth 51, and inclined downward toward the discharge ports 52. An inclined surface 53 is formed.
　排出口５２の下方には溶融金属鉄Ｍｅを排出するためのスライドバルブ５４が設けられている。 A slide valve 54 for discharging the molten metal iron Me is provided below the discharge port 52.
　排出された溶融金属鉄Ｍｅは、排出口５２の真下に配置された鍋（図示しない）で直接受けるか、または樋（図示しない）を介して回転炉床炉の近くに配置した鍋に集めるなどして回収される。 The discharged molten iron iron Me is directly received by a pan (not shown) arranged immediately below the discharge port 52, or collected in a pan arranged near the rotary hearth furnace through a firewood (not shown). And recovered.
　また、図８(ａ)および(ｂ)に示す別の炉床構造では、原料供給装置５０から原料Ｍａを供給する点は同じであるが、回転炉の中心部に向けて炉床６０の床面６０ａを先下がりに傾斜させるとともに、床面６０ａの内周側縁部に沿わせて溶融金属鉄が溢れ出さない高さの固定堰６１が設けられている。 8 (a) and 8 (b) is the same in that the raw material Ma is supplied from the raw material supply device 50, but the floor of the hearth 60 is directed toward the center of the rotary furnace. A fixed weir 61 having a height that prevents molten metal iron from overflowing along the inner peripheral side edge of the floor surface 60a is provided while the surface 60a is inclined downward.
　この固定堰６１は、排出エリアにおいてその一部が切り欠かれている。この炉床構造では回転炉の中心に設けられた排出口６０ｂに向けて、すり鉢状の傾斜面６０ａが形成され、特定の位置（切欠き部６１ａ）から溶融金属鉄を排出するようになっている。 This fixed weir 61 is partially cut away in the discharge area. In this hearth structure, a mortar-shaped inclined surface 60a is formed toward a discharge port 60b provided at the center of the rotary furnace, and molten metal iron is discharged from a specific position (notch portion 61a). Yes.
特開２００１－２８８５０４号公報JP 2001-288504 A
　上記した従来の炉床構造では、溶融金属鉄と溶融スラグが同時に排出されるため、次工程の転炉や電気炉などに溶融金属鉄を供給する際には、スラグを除去する必要がある。 In the conventional hearth structure described above, since molten metal iron and molten slag are discharged simultaneously, it is necessary to remove the slag when supplying molten metal iron to a converter or electric furnace in the next process.
　しかしながら、回転炉床炉と別に用意された鍋に回収した溶融金属鉄の温度が低下してしまうと、溶融金属鉄とスラグの分離が進行しないため、さらに別の工程を介してスラグを溶融金属鉄から分離させなければならず、回転炉床炉から連続的に製造される溶融金属鉄を、次工程で直接、使用することができないという問題があった。 However, if the temperature of the molten metal iron collected in the pan prepared separately from the rotary hearth furnace falls, the separation of the molten metal iron and slag does not proceed, so the slag is melted through a further process. There was a problem that the molten metal iron that had to be separated from the iron and was continuously produced from the rotary hearth furnace could not be used directly in the next step.
　本発明は以上のような従来の炉床構造における課題を考慮してなされたものであり、別工程を経ることなく回転炉床炉から排出される溶融スラグと溶融金属鉄とを分離させ、溶融金属鉄のみを回収することができる溶融金属鉄の製造装置を提供するものである。 The present invention has been made in consideration of the problems in the conventional hearth structure as described above. The molten slag discharged from the rotary hearth furnace and the molten metal iron are separated and melted without going through a separate process. An apparatus for producing molten metal iron capable of recovering only metal iron is provided.
　本発明は、炉中心部に向けて先下がりに傾斜する傾斜面からなる回転炉床と、上記炉中心部に設けられた排出口とを有し、少なくとも炭素質還元剤と酸化鉄含有物質からなる原料混合物を上記回転炉床上に装入し、装入した上記原料混合物を還元することにより金属鉄およびスラグ成分を溶融する回転炉床炉と、
　上記排出口の下方に設けられ、上記傾斜面を伝って流下する上記金属鉄およびスラグを貯溜する溶融物容器と、
　上記溶融物容器に付設された加熱手段とから構成される溶融金属鉄の製造装置である。 The present invention has a rotary hearth composed of an inclined surface inclined downward toward the furnace center, and a discharge port provided in the furnace center, at least from a carbonaceous reducing agent and an iron oxide-containing substance. A rotary hearth furnace in which the raw material mixture is charged on the rotary hearth, and the metal mixture and slag components are melted by reducing the charged raw material mixture;
A melt container for storing the metal iron and slag, which is provided below the discharge port and flows down along the inclined surface;
It is a manufacturing apparatus of molten metal iron comprised from the heating means attached to the said melt container.
　本発明において、上記傾斜面の傾斜角は３～３０°の範囲内に設定することが好ましい。 In the present invention, the inclination angle of the inclined surface is preferably set within a range of 3 to 30 °.
　本発明において、上記加熱手段として誘導加熱装置を有することができ、また、上記加熱手段として助燃バーナーを有することができ、また、これらを組み合わせて備えることもできる。 In the present invention, an induction heating device can be provided as the heating means, an auxiliary burner can be provided as the heating means, and a combination of these can also be provided.
　本発明において、上記回転炉床炉は床敷材を装入する床敷材装入装置を有し、上記回転炉床炉の回転方向における上記床敷材装入装置の上流側に、未排出の溶融金属鉄およびスラグの少なくともいずれか一方を強制的に上記排出口に案内する強制排出装置を備えることができる。 In the present invention, the rotary hearth furnace has a flooring material charging device for charging the flooring material, and is not discharged to the upstream side of the flooring material charging device in the rotation direction of the rotary hearth furnace. A forced discharge device that forcibly guides at least one of molten metal iron and slag to the discharge port can be provided.
　本発明において、回転する上記回転炉床と、固定された上記溶融物容器との連絡部分をシールするための水シール装置を設けることが好ましい。 In the present invention, it is preferable to provide a water seal device for sealing a connecting portion between the rotating rotary hearth and the fixed melt container.
　本発明において、上記溶融物容器に、溶融金属鉄とスラグを分離して回収する回収装置を設けることが好ましい。 In the present invention, it is preferable to provide a recovery device for separating and recovering molten metal iron and slag in the melt container.
　本発明における炭素質還元剤と酸化鉄含有物質を含む原料混合物とは、炭素質還元剤と酸化鉄含有物質の直接混合粉体、もしくはプレス機などによって塊状に成形された原料成形体であり、この原料成形体の形状は特に限定されず、塊状、粒状、ブリケット状、ペレット状、棒状などの様々な形状が含まれる。 The raw material mixture containing a carbonaceous reducing agent and an iron oxide-containing substance in the present invention is a raw material molded body molded in a lump by a direct mixed powder of a carbonaceous reducing agent and an iron oxide-containing substance, or a press machine, The shape of the raw material molded body is not particularly limited, and includes various shapes such as a lump shape, a granular shape, a briquette shape, a pellet shape, and a rod shape.
　本発明において、助燃バーナーとは、溶融物容器内に貯溜された溶融金属鉄およびスラグの流動が促進される温度に維持することを目的に補助的に加熱するバーナーを意味する。 In the present invention, the auxiliary combustion burner means a burner that is auxiliaryly heated for the purpose of maintaining the temperature at which the molten metal iron stored in the melt container and the flow of the slag are promoted.
　本発明の溶融金属鉄の製造装置によれば、別工程を経ることなく、回転炉床炉からともに排出された溶融スラグと溶融金属鉄について、溶融スラグを溶融金属鉄から分離させ、溶融金属鉄のみを回収することができるという長所を有する。 According to the molten metal iron production apparatus of the present invention, the molten slag and molten metal iron discharged together from the rotary hearth furnace are separated from the molten metal iron without going through a separate process, and the molten metal iron is separated. Only has the advantage that it can be recovered.
本発明に係る回転炉床炉の概略構成を示す縦断面図である。It is a longitudinal section showing a schematic structure of a rotary hearth furnace according to the present invention. 図１のＡ－Ａ矢視横断面図である。FIG. 2 is a cross-sectional view taken along arrow AA in FIG. 1. (ａ)は図１に示す強制排出装置の拡大平面図、(ｂ)は円周方向から見た強制排出装置の側面図である。(a) is an enlarged plan view of the forced discharge device shown in FIG. 1, and (b) is a side view of the forced discharge device viewed from the circumferential direction. 本発明の溶融物容器に助燃バーナーを付設した構成を示す説明図である。It is explanatory drawing which shows the structure which provided the auxiliary burner to the melt container of this invention. 本発明の回収装置の構成を示す説明図である。It is explanatory drawing which shows the structure of the collection | recovery apparatus of this invention. 図５に示す回収装置の平面図である。It is a top view of the collection | recovery apparatus shown in FIG. (ａ)は従来の回転炉床炉の炉床構造を示す平面図、(ｂ)は図７(ａ)のＦ－Ｆ矢視縦断面図、(ｃ)は図７(ａ)に示す排出口の拡大縦断面図である。(a) is a plan view showing the hearth structure of a conventional rotary hearth furnace, (b) is a vertical cross-sectional view taken along the line FF in FIG. 7 (a), and (c) is an exhaust view shown in FIG. 7 (a). It is an expansion longitudinal cross-sectional view of an exit. (ａ)は従来の別の炉床構造を示す平面図、(ｂ)はその縦断面図である。(a) is a top view which shows another conventional hearth structure, (b) is the longitudinal cross-sectional view.
　以下、図面に示した実施の形態に基づいて本発明を詳細に説明する。 Hereinafter, the present invention will be described in detail based on the embodiments shown in the drawings.
　図１は、本発明に係る溶融金属鉄の製造装置を構成する回転炉床炉１の概略構成を示した縦断面図であり、図２は図１のＡ－Ａ矢視横断面図である。 FIG. 1 is a longitudinal sectional view showing a schematic configuration of a rotary hearth furnace 1 constituting a molten metal iron manufacturing apparatus according to the present invention, and FIG. 2 is a transverse sectional view taken along the line AA in FIG. .
　両図において、回転炉床炉１は垂直軸Ｚまわりに回転する炉床（回転炉床）２を有している。 In both figures, the rotary hearth furnace 1 has a hearth (rotary hearth) 2 that rotates about a vertical axis Z.
　粉粒状の炭素質物質からなる炭材Ｃｆが床敷材供給機３から上記炉床２上に敷き詰められ、さらにその上に、原料成形体供給機４から原料混合物としての原料成形体Ｍｆが連続的に供給されるようになっている。 A carbonaceous material Cf made of a granular carbonaceous material is spread on the hearth 2 from the floor covering material supply machine 3, and further, a raw material molded body Mf as a raw material mixture is continuously supplied from the raw material molding body supply machine 4. Supplied.
　上記床敷材供給機３および原料成形体供給機４はそれぞれ振動フィーダーを備えており、炉床２上に炭材Ｃｆを均一に敷くことができるとともに、原料成形体Ｍｆをほぼ一層にして炭材Ｃｆ上に敷くことができるようになっている。 The floor covering material supply machine 3 and the raw material molded body supply machine 4 are each provided with a vibration feeder. The carbonaceous material Cf can be evenly laid on the hearth 2, and the raw material molded body Mf is made of almost one layer of carbon. It can be laid on the material Cf.
　原料成形体Ｍｆを供給する前に炭材Ｃｆを炉床２上に敷き詰めると、炉床面を保護することができ、鉄の浸炭を促進してより低温で操業することが可能になり、さらに、炭材Ｃｆの一部を後述する溶融物容器５に流下させると、その溶融物容器５内でも浸炭を促進させることができるという利点がある。 If the carbonaceous material Cf is spread on the hearth 2 before supplying the raw material molded body Mf, the hearth surface can be protected, and it becomes possible to promote carburization of iron and operate at a lower temperature. When a part of the carbon material Cf is caused to flow down to the melt container 5 described later, there is an advantage that carburization can be promoted even in the melt container 5.
　上記炉床２は反時計方向（矢印Ｂ方向）に回転しており、操業条件によって異なるが、約１０～２０分程度で一周し、その間に、炉壁および天板に設けられたバーナー（図示しない）の燃焼熱あるいはその輻射熱を受けて原料成形体Ｍｆ中に含まれる酸化鉄が還元されるようになっている。 The hearth 2 rotates counterclockwise (arrow B direction) and, depending on the operating conditions, makes a round in about 10 to 20 minutes, during which a burner (shown in the figure) is provided on the furnace wall and top plate. The iron oxide contained in the raw material molded body Mf is reduced by receiving the combustion heat or the radiant heat.
　上記炉床２は、炉中心部に向けてすり鉢状に傾斜する先下がりの傾斜面２ａを有し、流動状態になった溶融物Ｍｘ（溶融酸化鉄、溶融スラグ）を排出するための排出口２ｂを炉中心部に備えている。 The hearth 2 has a downwardly inclined surface 2a inclined in a mortar shape toward the center of the furnace, and an outlet for discharging the melt Mx (molten iron oxide, molten slag) in a fluid state. 2b is provided in the furnace center.
　傾斜面２ａの傾斜角は３～３０°の範囲内に設定されており、より好ましい傾斜角は１０～２５°である。 The inclination angle of the inclined surface 2a is set within a range of 3 to 30 °, and a more preferable inclination angle is 10 to 25 °.
　傾斜角が３°を下回ると溶融金属鉄とスラグが溶融しても自然流下せず、また、傾斜角が３０°を上回ると原料成形体Ｍｆを炉床２上に供給した時点で炉床２上に留まらず炉中心部（排出口２ｂ）に向けて転がり落ちてしまうからである。 When the tilt angle is less than 3 °, the molten metal iron and slag do not flow down naturally even when the molten metal is melted, and when the tilt angle exceeds 30 °, the raw material molded body Mf is supplied onto the hearth 2 at the point of time. This is because it does not stay above and rolls down toward the furnace center (discharge port 2b).
　上記排出口２ｂと連通する状態でその下方には溶融物容器５が設けられている。 A melt container 5 is provided below the outlet 2b in communication with the outlet 2b.
　上記溶融物容器５は有底筒状に構成されており、貯溜物を熱補償する目的で胴部外壁に沿って誘導加熱装置６および助燃バーナー７（図４参照）の少なくともいずれか一方が付設されている。 The melt container 5 has a bottomed cylindrical shape, and is provided with at least one of an induction heating device 6 and an auxiliary burner 7 (see FIG. 4) along the outer wall of the trunk for the purpose of heat compensation of the stored matter. Has been.
　上記誘導加熱装置６、助燃バーナー７は、溶融物容器５に付設される加熱手段として機能する。 The induction heating device 6 and the auxiliary burner 7 function as heating means attached to the melt container 5.
　運転中の回転炉床炉１において、原料成形体Ｍｆは溶融流動化した時点で傾斜面２ａに沿って流れ、炉中心部に設けられている排出口２ｂに集められ、溶融物容器５内に落下する。 In the rotary hearth furnace 1 in operation, the raw material molded body Mf flows along the inclined surface 2a when melted and fluidized, and is collected in the discharge port 2b provided in the center of the furnace, and is put in the melt container 5. Fall.
　溶融物容器５内では、溶融金属鉄とスラグとが相互に作用することによって溶融金属鉄の脱硫が進行する。 In the melt container 5, the molten metal iron and the slag interact with each other, so that the desulfurization of the molten metal iron proceeds.
　また、誘導加熱装置６により加熱されていることによって溶融物容器５内での溶融物Ｍｘの流動が促進されるため、溶融金属鉄とスラグとの分離が進行し、溶融金属鉄の表面にスラグが浮き出て層が形成される。 Moreover, since the flow of the melt Mx in the melt container 5 is promoted by being heated by the induction heating device 6, the separation of the molten metal iron and the slag proceeds, and the slag is formed on the surface of the molten metal iron. Is raised to form a layer.
　なお、図１において符号Ｍｉは溶融金属鉄を、符号Ｓはスラグをそれぞれ示している。また、図２において符号８は強制排出装置（後述する）を示し、符号１ａは回転炉床炉の天板から垂下されている仕切壁を示し、符号１ｂは炉壁を示している。 In FIG. 1, the symbol Mi indicates molten metal iron, and the symbol S indicates slag. In FIG. 2, reference numeral 8 denotes a forced discharge device (described later), reference numeral 1 a denotes a partition wall hanging from the top plate of the rotary hearth furnace, and reference numeral 1 b denotes a furnace wall.
　なお、固定されている炉壁１ｂの下部と、回転する炉床２の外周部との連絡部分は、水シール装置９が介設されることによってシールされている。 In addition, the connection part of the lower part of the fixed furnace wall 1b and the outer peripheral part of the rotating hearth 2 is sealed by the water seal apparatus 9 being interposed.
　また、回転する炉床２における内周側の周縁部と、固定されている溶融物容器５の上部との連絡部分にも別の水シール装置９′が介設され、シールされている（図５参照）。 In addition, another water sealing device 9 'is interposed and sealed at the connecting portion between the inner peripheral edge of the rotating hearth 2 and the upper part of the melt container 5 that is fixed (see FIG. 5).
　図３(ａ)は強制排出装置８を拡大して示した平面図であり、図３(ｂ)は炉床円周方向からその強制排出装置８を見た側面図である。 FIG. 3 (a) is an enlarged plan view showing the forced discharge device 8, and FIG. 3 (b) is a side view of the forced discharge device 8 seen from the circumferential direction of the hearth.
　両図において、強制排出装置８は長方形をなす耐火物製の帯板８ａ～８ｄからなり、これらの帯板８ａ～８ｄは回転炉床炉１の天板１ｃから垂下され、回転炉床炉の幅方向に連ねて設けられ、自由端となる下端と炉床表面との間には所定の隙間Ｌｖが設けられている。 In both figures, the forced discharge device 8 comprises rectangular strips 8a to 8d made of refractory, and these strips 8a to 8d are suspended from the top plate 1c of the rotary hearth furnace 1, A predetermined gap Lv is provided between the lower end serving as a free end and the hearth surface, which is provided continuously in the width direction.
　上記所定の隙間Ｌｖは、排出しようとする溶融物Ｍｘの量が炉床２の中心側ほど高くなることを考慮し、炉中心部に向けて段階的に広くすることが好ましい。 The predetermined gap Lv is preferably increased stepwise toward the furnace center in consideration that the amount of the melt Mx to be discharged increases toward the center of the hearth 2.
　また、図３(ａ)において、各帯板８ａ～８ｄは、炉床２の外周側から内周側に向けて順次、後退する（回転方向Ｂにおいて）ように階段状に配置されており、図３(ｂ)に示すように、隣接する帯板８ａ～８ｄ間には重なり代Ｌｈが確保されている。 Further, in FIG. 3A, the strips 8a to 8d are arranged in a stepped manner so as to sequentially retreat (in the rotation direction B) from the outer peripheral side to the inner peripheral side of the hearth 2. As shown in FIG. 3B, an overlap margin Lh is secured between the adjacent strips 8a to 8d.
　上記構成を有する強制排出装置８を設けると、未排出の溶融金属鉄、溶融スラグ、床敷き材のうちのいずれかまたは複数を強制的に排出口２ｂに案内させることができ、強制排出装置８よりも下流側の炉床表面を平滑にすることができる。 When the forced discharge device 8 having the above-described configuration is provided, any one or more of undischarged molten metal iron, molten slag, and flooring material can be forcibly guided to the discharge port 2b. Further, the hearth surface on the downstream side can be smoothed.
　なお、帯板８ａ～８ｄの下部は徐々に摩耗していくため、各帯板８ａ～８ｄは油圧シリンダ等の昇降装置８ｅを設け、ロッドを徐々に伸張させることによって上記所定の隙間Ｌｖを維持したり、または、帯板を継ぎ足すことにより上記所定の隙間Ｌｖを維持できるようにすることが好ましい。 Since the lower portions of the strips 8a to 8d are gradually worn, each strip 8a to 8d is provided with a lifting / lowering device 8e such as a hydraulic cylinder, and the rod is gradually extended to maintain the predetermined gap Lv. It is preferable that the predetermined gap Lv can be maintained by adding a band plate.
　上記強制排出装置８は必要に応じて、または溶融物Ｍｘを排出できない場合の安全装置として設けられるものであり、溶融物Ｍｘがスムーズに排出口２ｂに流れる場合は省略することができる。 The forced discharge device 8 is provided as necessary or as a safety device when the melt Mx cannot be discharged, and can be omitted when the melt Mx smoothly flows to the discharge port 2b.
　図４は、助燃バーナー７のみを加熱手段として溶融物容器５に付設する構成を示した説明図である。 FIG. 4 is an explanatory view showing a configuration in which only the auxiliary burner 7 is attached to the melt container 5 as a heating means.
　なお、以下の説明において、図１と同じ構成要素については同一符号を付してその説明を省略する。 In the following description, the same components as those in FIG.
　図４において、助燃バーナー７は、火炎が溶融物容器５の中心線に向けられるように溶融物容器５の上部に略水平方向に設けられている。 4, the auxiliary burner 7 is provided in a substantially horizontal direction on the upper part of the melt container 5 so that the flame is directed toward the center line of the melt container 5.
　この場合、溶融物容器５において助燃バーナー７の取付け位置よりも低い位置にスラグを排出するためのスラグ排出口５ａを設け、そのスラグ排出口５ａよりもさらに低い位置に溶融金属鉄排出口５ｂを設ける。 In this case, a slag discharge port 5a for discharging the slag is provided at a position lower than the attachment position of the auxiliary burner 7 in the melt container 5, and the molten metal iron discharge port 5b is provided at a position lower than the slag discharge port 5a. Provide.
　図５は、溶融金属鉄ＭｉとスラグＳを回収する回収装置１０の構成を示した説明図であり、図６はその平面図である。 FIG. 5 is an explanatory view showing the configuration of the recovery apparatus 10 that recovers molten metal iron Mi and slag S, and FIG. 6 is a plan view thereof.
　両図において、回収装置１０は、溶融物容器５の上部から水平方向に延設された受銑樋１１を有し、この受銑樋１１の先端下面に溶融金属鉄Ｍｉを排出する溶融金属鉄取出口１１ａが設けられている。 In both figures, the recovery device 10 has a receiving rod 11 extending in the horizontal direction from the top of the melt container 5, and molten metal iron that discharges molten metal iron Mi to the lower surface of the tip of the receiving rod 11. An outlet 11a is provided.
　溶融金属取出口１１ａの下方には垂直軸まわりに旋回可能な樋１３が設けられ、この樋１３が旋回する範囲の一方側には第一の溶融金属鉄鍋１４が配置され、他方側に第二の溶融金属鉄鍋１５が配置される。 Below the molten metal outlet 11a, there is provided a bowl 13 that can be swung around a vertical axis. A first molten metal pan 14 is arranged on one side of the range in which the bowl 13 turns, and the first is on the other side. Two molten metal iron pans 15 are arranged.
　それにより、連続的に排出される溶融金属鉄Ｍｉを第一および第二の溶融金属鉄鍋１４，１５に交互に振り分けることができるようになっている。 Thereby, the molten metal iron Mi discharged continuously can be alternately distributed to the first and second molten metal iron pans 14 and 15.
　また、誘導加熱装置６を付設した溶融物容器５は誘導加熱炉１６として機能し、回転炉床炉１の運転休止や誘導加熱炉１６の炉修理を行う場合は、受銑樋１１内の溶融金属鉄Ｍｉを抜き取った後、誘導加熱炉１６を接続部分Ｃから切り離して降下させ、次いで傾斜させることにより、誘導加熱炉１６内の溶融金属鉄Ｍｉをすべて第三の溶融金属鉄鍋１７に排出する。 The melt container 5 provided with the induction heating device 6 functions as an induction heating furnace 16, and when the operation of the rotary hearth furnace 1 is stopped or the furnace repair of the induction heating furnace 16 is performed, the melt in the receiver 11 is melted. After extracting the metal iron Mi, the induction heating furnace 16 is separated from the connection portion C and lowered, and then tilted to discharge all the molten metal iron Mi in the induction heating furnace 16 to the third molten metal iron pan 17. To do.
　なお、受銑樋１１については、接続部分Ｄから切り離し、水平方向（図６の矢印Ｅ方向参照）に移動させることができるようになっている。 In addition, about the receptacle 11, it can isolate | separate from the connection part D and can be moved to a horizontal direction (refer arrow E direction of FIG. 6).
　また、上記受銑樋１１の途中にはスラグストッパー１１ｂが設けられている。 Further, a slag stopper 11b is provided in the middle of the receiving 11.
　このスラグストッパー１１ｂは昇降可能に構成されており、回転炉床炉１の稼働開始時には受銑樋１１の底面まで降下し、湯溜まりができると図５に示すスラグ分離位置まで上昇するように構成されている。それにより、スラグＳはスラグ排出口１１ｃ（図６参照）から排出され、スラグポット１２に回収される。 The slag stopper 11b is configured to be movable up and down, and when the rotary hearth furnace 1 starts operation, the slag stopper 11b is lowered to the bottom surface of the receiving tray 11, and is configured to rise to a slag separation position shown in FIG. Has been. Thereby, the slag S is discharged from the slag discharge port 11c (see FIG. 6) and collected in the slag pot 12.
　本発明は、溶融スラグと溶融金属鉄とを分離させ、溶融金属鉄のみを回収する製造装置に利用することができる。 The present invention can be used in a manufacturing apparatus that separates molten slag and molten metal iron and collects only molten metal iron.
　１　　回転炉床炉
　１ａ　仕切壁
　１ｂ　炉壁
　１ｃ　天板
　２　　炉床（回転炉床）
　２ａ　傾斜面
　２ｂ　排出口
　３　　床敷材供給機
　４　　原料成形体供給機
　５　　溶融物容器
　５ａ　スラグ排出口
　５ｂ　溶融金属鉄排出口
　６　　誘導加熱装置
　７　　助燃バーナー
　８　　強制排出装置
　８ａ～８ｄ　帯板
　８ｅ　昇降装置
　９　　水シール装置
１０　　回収装置
１１　　受銑樋
１１ａ　溶融金属鉄取出口
１１ｂ　スラグストッパー
１２　　スラグポット
１３　　樋
１４　　第一の溶融金属鉄鍋
１５　　第二の溶融金属鉄鍋
１６　　誘導加熱炉
１７　　第三の溶融金属鉄鍋
Ｃｆ　　炭材
Ｍｆ　　原料成形体
Ｍｘ　　溶融物
Ｍｉ　　溶融金属鉄
Ｓ　　　スラグ 1 rotary hearth furnace 1a partition wall 1b furnace wall 1c top plate 2 hearth (rotary hearth)
2a Inclined surface 2b Discharge port 3 Floor covering material feeder 4 Raw material molded body feeder 5 Melt container 5a Slag discharge port 5b Molten metal iron discharge port 6 Induction heating device 7 Auxiliary burner 8 Forced discharge device 8a-8d Strip 8e Elevating Device 9 Water seal device 10 Recovery device 11 Receptacle 11a Molten metal iron outlet 11b Slag stopper 12 Slag pot 13 ポ ッ ト 14 First molten metal iron pan 15 Second molten metal iron pan 16 Induction furnace 17 Third Molten metal iron pan Cf Carbon material Mf Raw material compact Mx Melt Mi Molten metal iron S Slag

Claims (9)

  1. 　炉中心部に向けて先下がりに傾斜する傾斜面からなる回転炉床と、上記炉中心部に設けられた排出口とを有し、少なくとも炭素質還元剤と酸化鉄含有物質からなる原料混合物を上記回転炉床上に装入し、装入した上記原料混合物を還元することにより金属鉄およびスラグ成分を溶融する回転炉床炉と、
    　上記排出口の下方に設けられ、上記傾斜面を伝って流下する上記金属鉄およびスラグを貯溜する溶融物容器と、
    　上記溶融物容器に付設された加熱手段とから構成されることを特徴とする溶融金属鉄の製造装置。     A rotary hearth composed of an inclined surface inclined downward toward the center of the furnace, and a discharge port provided in the center of the furnace, and a raw material mixture comprising at least a carbonaceous reducing agent and an iron oxide-containing substance. A rotary hearth furnace that is charged onto the rotary hearth and melts the metal iron and slag components by reducing the charged raw material mixture;
    A melt container for storing the metal iron and slag, which is provided below the discharge port and flows down along the inclined surface;
    An apparatus for producing molten metal iron, comprising heating means attached to the melt container.
  2. 　上記傾斜面の傾斜角が３～３０°の範囲内に設定されている請求項１記載の溶融金属鉄の製造装置。 The apparatus for producing molten metal iron according to claim 1, wherein an inclination angle of the inclined surface is set within a range of 3 to 30 °.
  3. 　上記加熱手段として誘導加熱装置を有する請求項１記載の溶融金属鉄の製造装置。 The apparatus for producing molten metal iron according to claim 1, wherein the heating means includes an induction heating device.
  4. 　上記加熱手段として助燃バーナーを有する請求項１記載の溶融金属鉄の製造装置。 The apparatus for producing molten metal iron according to claim 1, wherein the heating means has an auxiliary burner.
  5. 　上記加熱手段として誘導加熱装置と助燃バーナーを有する請求項１記載の溶融金属鉄の製造装置。 The apparatus for producing molten metal iron according to claim 1, wherein the heating means includes an induction heating device and an auxiliary burner.
  6. 　上記回転炉床炉は床敷材を装入する床敷材装入装置を有し、上記回転炉床炉の回転方向における上記床敷材装入装置の上流側に、未排出の溶融金属鉄およびスラグの少なくともいずれか一方を強制的に上記排出口に案内する強制排出装置が備えられている請求項１記載の溶融金属鉄の製造装置。 The rotary hearth furnace has a flooring material charging device for charging the flooring material, and the undischarged molten metal iron is disposed upstream of the flooring material charging device in the rotation direction of the rotary hearth furnace. The apparatus for producing molten metal iron according to claim 1, further comprising a forced discharge device that forcibly guides at least one of slag and the slag to the discharge port.
  7. 　上記強制排出装置は、回転炉床炉の天板から垂下され、回転炉床炉の幅方向に連ねて設けられる複数の帯板から構成される請求項６記載の溶融金属鉄の製造装置。 The said forced discharge apparatus is a manufacturing apparatus of the molten metal iron of Claim 6 comprised from the several strip plate which hangs down from the top plate of a rotary hearth furnace, and is continued and provided in the width direction of a rotary hearth furnace.
  8. 　回転する上記回転炉床と、固定された上記溶融物容器との連絡部分をシールするための水シール装置が設けられている請求項１～６のいずれか１項に記載の溶融金属鉄の製造装置。 The production of molten metal iron according to any one of claims 1 to 6, wherein a water seal device is provided for sealing a connecting portion between the rotating hearth rotating and the fixed melt container. apparatus.
  9. 　上記溶融物容器に、溶融金属鉄とスラグを分離して回収する回収装置が設けられている請求項１～６のいずれか１項に記載の溶融金属鉄の製造装置。 The apparatus for producing molten metal iron according to any one of claims 1 to 6, wherein a recovery device for separating and recovering molten metal iron and slag is provided in the melt container.
PCT/JP2011/070426 2010-10-21 2011-09-08 Apparatus for producing molten metallic iron WO2012053291A1 (en)

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JP7255272B2 (en) * 2019-03-25 2023-04-11 住友金属鉱山株式会社 Nickel oxide ore smelting method, reduction furnace

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JP2000346562A (en) * 1999-06-01 2000-12-15 Osaka Gas Co Ltd Rotary furnace for heating steel material
JP2002047507A (en) * 2000-07-31 2002-02-15 Kobe Steel Ltd Method for producing molten iron and apparatus for producing molten iron

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CN103940220A (en) * 2014-04-09 2014-07-23 岑溪市东正动力科技开发有限公司 Slag discharging device of rotary furnace

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