WO2013099807A1 - アーク炉 - Google Patents
アーク炉 Download PDFInfo
- Publication number
- WO2013099807A1 WO2013099807A1 PCT/JP2012/083273 JP2012083273W WO2013099807A1 WO 2013099807 A1 WO2013099807 A1 WO 2013099807A1 JP 2012083273 W JP2012083273 W JP 2012083273W WO 2013099807 A1 WO2013099807 A1 WO 2013099807A1
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- WO
- WIPO (PCT)
- Prior art keywords
- arc
- furnace
- raw material
- furnace body
- exhaust port
- Prior art date
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Classifications
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- 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
- C21C5/52—Manufacture of steel in electric furnaces
- C21C5/527—Charging of the electric furnace
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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
- F27B3/00—Hearth-type furnaces, e.g. of reverberatory type; Tank furnaces
- F27B3/08—Hearth-type furnaces, e.g. of reverberatory type; Tank furnaces heated electrically, with or without any other source of heat
- F27B3/085—Arc 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
- F27B3/00—Hearth-type furnaces, e.g. of reverberatory type; Tank furnaces
- F27B3/10—Details, accessories, or equipment peculiar to hearth-type 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
- F27B3/00—Hearth-type furnaces, e.g. of reverberatory type; Tank furnaces
- F27B3/10—Details, accessories, or equipment peculiar to hearth-type furnaces
- F27B3/18—Arrangements of devices for charging
-
- 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
- F27B3/00—Hearth-type furnaces, e.g. of reverberatory type; Tank furnaces
- F27B3/10—Details, accessories, or equipment peculiar to hearth-type furnaces
- F27B3/20—Arrangements of heating devices
-
- 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
- F27B3/00—Hearth-type furnaces, e.g. of reverberatory type; Tank furnaces
- F27B3/10—Details, accessories, or equipment peculiar to hearth-type furnaces
- F27B3/22—Arrangements of air or gas supply devices
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- 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
- F27D11/08—Heating by electric discharge, e.g. arc discharge
-
- 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
- F27D11/08—Heating by electric discharge, e.g. arc discharge
- F27D11/10—Disposition of electrodes
-
- 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
- F27D13/00—Apparatus for preheating charges; Arrangements for preheating charges
- F27D13/002—Preheating scrap
-
- 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
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/001—Extraction of waste gases, collection of fumes and hoods used therefor
-
- 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
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/001—Extraction of waste gases, collection of fumes and hoods used therefor
- F27D17/003—Extraction of waste gases, collection of fumes and hoods used therefor of waste gases emanating from an electric arc furnace
-
- 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
- F27D7/00—Forming, maintaining, or circulating atmospheres in heating chambers
- F27D7/02—Supplying steam, vapour, gases, or liquids
-
- 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
- F27D7/00—Forming, maintaining, or circulating atmospheres in heating chambers
- F27D7/04—Circulating atmospheres by mechanical means
-
- 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
- C21C5/52—Manufacture of steel in electric furnaces
- C21C5/527—Charging of the electric furnace
- C21C2005/5282—Charging of the electric furnace with organic contaminated scrap
-
- 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
- Y02P10/20—Recycling
Definitions
- the present invention relates to an arc furnace for melting iron scrap or the like by arc.
- An arc furnace (also referred to as an “electric furnace”) is a facility in which a solid metal raw material is charged into a furnace and then an electrode is inserted and energized to melt the solid metal raw material with an arc.
- a steelmaking arc furnace iron scrap, reduced iron (DRI), hot briquette iron (HBI) obtained by briquetting it at a high temperature, cold iron (model iron), or the like is used.
- Patent Document 1 discloses a technique in which a preheating tank is provided separately from an arc furnace, and the raw material is preheated with exhaust gas and then charged into the arc furnace.
- Patent Document 2 the furnace body itself of the arc furnace is used as a preheating container, exhaust gas discharged from another arc furnace is introduced from above, and discharged from a plurality of exhaust ports on the side of the furnace body to preheat the raw material. Then, techniques for operating an arc furnace with the furnace body have been proposed.
- Patent Document 1 it is necessary to provide a new facility called a preheating tank, which increases the cost.
- the exhaust gas needs to be guided to the preheating tank by a water cooling duct, and the sensible heat of the exhaust gas is sufficiently reduced. There is a problem that it cannot be used.
- oil etc. have adhered to the raw material, if exhaust gas is supplied to this, white smoke containing bad odor is generated, which is not preferable in the working environment.
- the present invention has been made in view of such circumstances, and an object of the present invention is to provide an arc furnace capable of simultaneously preheating the raw material and melting the arc furnace at low cost without significantly changing existing facilities.
- the present invention provides an arc furnace for melting a raw material by an arc formed by energizing an arc electrode, the furnace main body charged with the raw material to be melted, and an upper opening of the furnace main body A furnace lid that closes the furnace, an arc electrode that is inserted into the furnace body from above the furnace lid and forms an arc by energization to melt the raw material, and an exhaust port that discharges the exhaust gas in the furnace body
- the arc electrode is disposed in a horizontal plane of the furnace body such that the center of arc heating is eccentric from the center of the furnace body to the side, and the exhaust port is opposite to the eccentric direction of the arc electrode.
- the exhaust gas generated by the arc heating by the arc electrode passes between the raw materials charged in the furnace body.
- the exhaust port Providing an arc furnaces et discharged.
- a plurality of the exhaust ports be provided to adjust the exhaust air volume from each exhaust port or to switch the exhaust ports.
- the said furnace main body has a semi-sealing structure in the state which mounted
- the bottom of the furnace body further includes a gas blowing member for blowing a stirring gas into the molten metal formed by melting the raw material in the furnace body.
- the raw material is charged all at once and the operation is performed without additional charging. It is further provided with a charging chamber provided on the side of the furnace body for charging a raw material having a bulk density of 1.0 ton / m 3 or more, and the raw material having a bulk density of 1.0 ton / m 3 or more is It is preferable to charge the furnace body from the charging chamber through the exhaust port.
- the charging chamber is provided so as to be adjacent to the side wall of the furnace body where the exhaust port is formed, and the bulk density charged by the exhaust gas discharged from the exhaust port is 1 It is preferable to preheat a raw material of 0.0 ton / m 3 or more.
- the arc electrode is arranged in the horizontal plane of the furnace body so that the center of the arc heating is eccentric from the center of the furnace body to the side, and the exhaust in the furnace body is in the eccentric direction of the arc electrode. It is the side wall of the furnace body on the opposite side from the exhaust port provided at a height position in the range where the raw material exists, so it becomes hot due to arc heating, supply of O 2 gas by lance, burner, etc.
- the heat of the exhaust gas is absorbed by the undissolved raw material and contributes to the preheating of the raw material, and the electric power consumption can be reduced by effectively using the high-temperature gas flow.
- FIG. 1 is a vertical sectional view showing an arc furnace according to an embodiment of the present invention. It is a horizontal sectional view showing an arc furnace concerning one embodiment of the present invention. It is a model vertical sectional view for explaining the effect of the present invention. It is a model horizontal cross section for demonstrating the effect of this invention. It is a vertical sectional view showing an arc furnace according to another embodiment of the present invention. It is a vertical sectional view showing an arc furnace according to still another embodiment of the present invention.
- FIG. 1 is a vertical sectional view showing an arc furnace according to an embodiment of the present invention
- FIG. 2 is a horizontal sectional view thereof.
- This arc furnace is configured as an AC type steelmaking arc furnace, and includes a furnace body 1 for melting an iron-based raw material such as iron scrap by arc heating.
- the furnace body 1 has a cylindrical body-shaped body (furnace shell) 2 and a bottom 3 lined with a refractory. From the viewpoint of reducing heat loss, the body 2 is preferably lined with a refractory.
- the opening at the top of the furnace body 1 is closed with a furnace lid 4.
- three arc electrodes 5 are vertically inserted from above the furnace lid 4 to the vicinity of the bottom 3 in the furnace body 1.
- a quasi-sealed structure is preferred.
- the inner side of the furnace lid 4 is covered with a refractory from the viewpoint of reducing heat loss.
- the raw material such as scrap is charged into the furnace body 1 by a bucket with the furnace lid 4 and the arc electrode 5 removed.
- the three arc electrodes 5 are made of graphite, and when the arc electrode 5 is energized, an arc is generated from the tip thereof to melt the raw material S such as iron scrap. These arc electrodes 5 are arranged on the horizontal plane of the furnace body 1 such that the center of arc heating by them is eccentric from the center of the furnace body 1 to the side.
- an exhaust port 6 is provided on the side wall of the furnace body 1 opposite to the eccentric direction of the arc electrode 5 at the height position of the raw material charging range.
- a plurality of exhaust ports 6 are provided along the circumferential direction of the furnace body 1, and dust collection equipment (not shown) is provided from the exhaust port 6 through the exhaust duct 7 and by the fan 8. To be sent to.
- the exhaust duct 7 of each exhaust port 6 is provided with a damper 7a, and the exhaust air volume from each exhaust port 6 can be adjusted or the exhaust port 6 can be switched. Thereby, the preheating of the raw material S can be adjusted.
- a bottom 9 of the furnace body 1 is provided with a tap 9 for pouring the melt after arc melting.
- the furnace body 1 is provided with a lance 10 for supplying O 2 gas and blowing carbonaceous material.
- a lance 10 for supplying O 2 gas and blowing carbonaceous material.
- the two lances 10 are drawn in FIG. 2, the number is not limited.
- blown O 2 gas and carbonaceous material from the lance 10 may be supplied from separate lance.
- a burner 11 is provided on the side wall of the furnace body 1.
- the melting of the raw material S is promoted in the region where the progress of the melting is slow due to the combustion heat generated by the burner 11 to compensate for the unmelted raw material S due to the bias of the arc electrode 5.
- the two burners 11 are drawn in FIG. 2, the number is not limited.
- the raw material S is charged into the furnace main body 1 by a bucket (not shown).
- a bucket As the raw material S, iron scrap, reduced iron (DRI), hot briquette iron (HBI) obtained by briquetting it, cold iron (model iron), automobile shredder dust (ASR), and the like are used.
- hot metal can be separately charged as a part of the raw materials.
- the furnace lid 4 is attached, and the arc electrode 5 is inserted into the furnace body.
- the arc electrode 5 may be attached to the furnace lid 4 and the furnace lid 4 and the arc electrode may be integrally attached to the furnace body 1.
- the arc electrode 5 is energized to form the arc 12, and the raw material S is melted.
- the arc electrode 5 is disposed on the horizontal plane of the furnace body 1 such that the center of the arc heating by the arc electrode 5 is decentered laterally from the center of the furnace body 1, as shown in FIGS. 3A and 3B.
- the raw material S is melted by the arc 12 in the arc heating center deviated laterally from the center of the furnace body 1 and in the area M in the vicinity thereof, but the area on the opposite side of the arc electrode 5 in the furnace body 1. Since N is away from the arc electrode 5, the raw material S present in the region N is not melted.
- exhaust in the furnace body 1 is performed from the exhaust port 6 provided at a height position where the raw material S on the side wall of the furnace body 1 on the side opposite to the eccentric direction of the arc electrode 5 exists.
- the exhaust gas stream G that has become high temperature due to arc heating is exhausted from the exhaust port 6 through the gap of the raw material S that has not been dissolved. Therefore, the heat of the high temperature exhaust gas stream G is absorbed by the raw material S, and the raw material S is preheated.
- O 2 gas is supplied by the lance 10 to assist the melting of the raw material S.
- a carbon material as an auxiliary heat source is injected from the lance 10 into the slag to shift to a slag forming operation, and the tip of the arc electrode 5 is buried in the slag.
- An arc 12 is formed in the slag.
- the carbon material as the auxiliary heat source reacts with the supplied oxygen and contributes to the dissolution of the raw material S.
- the raw material S is melted by the heating by the arc 12, the heat of the molten metal L formed by the arc 12, and the high-temperature gas flow G.
- the raw material S is preheated with high temperature exhaust gas, and melt
- the raw material S is supplementarily heated by the burner 11 at a portion where unmelted residue is likely to occur due to the overall heat balance. And when all the raw materials S melt
- the arc electrode 5 is arranged so that the center of arc heating by them is eccentric from the center of the furnace body 1, and the exhaust in the furnace body 1 is the eccentric direction of the arc electrode 5. Since it is carried out from the exhaust port 6 provided on the side wall of the furnace body 1 on the opposite side and at the height position where the raw material S exists, the heat of the exhaust gas heated to high temperature by arc heating is not dissolved. The heat is absorbed and contributes to the preheating of the raw material S, and the high-temperature gas flow can be effectively used to reduce the power consumption.
- a high-temperature exhaust gas having sensible heat In this embodiment, the sensible heat of the high-temperature exhaust gas can be effectively used for preheating until the end of melting of the raw material S. Moreover, since only the insertion position of the arc electrode 5 and the position of the exhaust port 6 are changed with respect to the conventional arc furnace, it is not necessary to significantly change the existing equipment.
- the furnace body 1 has a semi-sealed structure with the furnace lid 4 attached. Thereby, it becomes easy to form a flow from the melting region by the arc electrode 5 toward the exhaust port 6.
- a semi-sealing structure in this way, the amount of gas components generated by dissolution, the amount of oxygen gas from the lance 10 and the burner 11 and the amount of air introduced from a slight gap are balanced with the amount of exhaust from the exhaust port 6.
- the height position of the lowermost portion of the exhaust port 6 is preferably close to the molten metal surface of the molten metal L, and is preferably in a range of 500 mm to 1 m from the molten metal surface setting position.
- the entire amount is charged at a time (single charging) without performing the additional charging of the raw material that is performed in a normal arc furnace.
- the volume of the furnace body 1 is equivalent to a 140 ton furnace. That is, the conventional 70 ton furnace having a diameter of 5800 mm ⁇ is defined as 7300 mm ⁇ .
- the arc electrode 5 it is preferable to decenter the heating center by the arc electrode 5 by about 20 to 30% of the diameter of the furnace body.
- the arc electrode 5 and the furnace wall be separated as much as the conventional AC furnace (multiple charging furnace).
- a raw material having a high bulk density (1.0 ton / m 3 or more; hereinafter referred to as a high-density raw material) may break the arc electrode 5.
- the high-density raw material has a small specific surface area and is not easily oxidized, it is preferable to provide the charging chamber 20 in a portion where the exhaust port 6 on the side wall of the furnace body 1 is formed as shown in the figure.
- the high-density raw material can be preheated by the exhaust gas discharged from the exhaust port 6 without fear of oxidation.
- the high-density raw material S1 in the charging chamber 20 can be preheated by discharging the exhaust gas after preheating in the furnace from the exhaust port 6 to the charging chamber 20, and the charging chamber 20 Is exhausted from the exhaust port 21 on the side thereof.
- the high-density raw material S1 can be charged from the charging chamber 20 into the furnace body 1 using the pusher 25 through the lower exhaust port 6.
- a raw material having a low bulk density (less than 1.0 ton / m 3 ) has only a low probability of breaking the arc electrode 5, and therefore may be charged into the bucket from the upper opening of the furnace body 1.
- a gas blowing plug 30 for blowing a stirring gas into the furnace bottom 3 is provided to It is preferable to stir by gas bubbling.
- the electric power consumption can be reduced by about 75 to 100 kWh / t as compared with a normal arc furnace.
- the electric power unit of a normal arc furnace is 350 to 400 kWh / t
- the arc furnace of this embodiment can reduce the power unit to about 250 to 325 kWh / t.
- a DC arc furnace may be used.
- the number of arc electrodes is not limited, and at least one is sufficient.
- the arc furnace for steelmaking has been described.
- the present invention is not limited to steelmaking, and other metals may be melted.
- the carbon material is blown from the lance.
- lump coke or ASR may be charged from the charging port of the furnace lid 4 as the carbon material.
- an oxygen lance may be inserted in the same manner as the arc electrode to perform oxygen blowing.
- the arc electrode 5 can be arranged to form three vertices of a square, and an oxygen lance can be inserted into the remaining one vertex.
- furnace body 2 trunk (furnace shell) 3; Bottom 4; Furnace 5; Arc electrode 6; Exhaust port 7; Exhaust duct 7a; Damper 8; Fan 9; Outlet port 10; Lance 11; Burner 12; Arc 20; 30; Gas blowing plug L; Molten metal S; Raw material
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- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Vertical, Hearth, Or Arc Furnaces (AREA)
- Furnace Details (AREA)
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Abstract
Description
図1は本発明の一実施形態に係るアーク炉を示す垂直断面図、図2はその水平断面図である。このアーク炉は、交流式の製鋼用アーク炉として構成され、鉄スクラップ等の鉄系原料をアーク加熱して溶解するための炉本体1を備えている。炉本体1は、円筒状をなす水冷構造の胴部(炉殻)2と、耐火物で内張された底部3とを有している。熱ロスを少なくする観点からは、胴部2も耐火物で内張されていることが好ましい。
最初に、炉蓋4を外した状態で、炉本体1内に原料Sをバケット(図示せず)により装入する。原料Sとしては、鉄スクラップや還元鉄(DRI)およびそれを高温でブリケット化したホット・ブリケット・アイアン(HBI)、冷銑(型銑)、自動車シュレッダダスト(ASR)等が用いられる。また、これら固体原料に加えて、原料の一部として別途溶銑を装入することもできる。
2;胴部(炉殻)
3;底部
4;炉蓋
5;アーク電極
6;排気口
7;排気ダクト
7a;ダンパー
8;ファン
9;出湯口
10;ランス
11;バーナー
12;アーク
20;装入チャンバー
21;排気口
25;プッシャー
30;ガス吹き込みプラグ
L;溶湯
S;原料
Claims (10)
- アーク電極に通電して形成されたアークにより原料を溶解するアーク炉であって、
溶解される原料が装入される炉本体と、
炉本体の上部開口を塞ぐ炉蓋と、
前記炉蓋の上方から前記炉本体内に挿入され、通電することによりアークを形成して原料を溶解するアーク電極と、
前記炉本体内の排ガスを排出する排気口と
を備え、
前記アーク電極は、前記炉本体の水平面において、アーク加熱の中心が前記炉本体の中心から側方へ偏心するように配置され、
前記排気口は、前記アーク電極の偏心方向とは反対側の前記炉本体の側壁であって、前記原料が存在する範囲の高さ位置に設けられており、
前記アーク電極によるアーク加熱により発生した排ガスが前記炉本体に装入された原料の間を通って前記排気口から排出されるアーク炉。 - 前記排気口を複数備え、各排気口からの排気風量調節または排気口の切り替えを可能にする請求項1に記載のアーク炉。
- 前記炉本体は、前記炉蓋を装着した状態で準密閉構造を有する請求項1または請求項2に記載のアーク炉。
- 前記アーク電極からのアークにより溶解して形成された溶湯にO2ガスを吹き込むランスをさらに備える請求項1から請求項3のいずれか1項に記載のアーク炉。
- 前記ランスまたは別のランスで炭材を吹き込む請求項4に記載のアーク炉。
- 前記炉本体の側壁に設けられ、前記炉本体内の原料を加熱するためのバーナーをさらに備える請求項1から請求項5のいずれか1項に記載のアーク炉。
- 前記炉本体の底部には、前記炉本体内で原料が溶解して形成された溶湯に、攪拌ガスを吹き込むためのガス吹き込み部材をさらに備える請求項1から請求項6のいずれか1項に記載のアーク炉。
- 原料を一回で全量装入し、追装することなく操業が行われる請求項1から請求項7のいずれか1項に記載のアーク炉。
- 前記炉本体の側方に設けられた、嵩密度が1.0ton/m3以上の原料を装入するための装入チャンバーをさらに備え、嵩密度が1.0ton/m3以上の原料は前記装入チャンバーから前記排気口を介して前記炉本体に装入される請求項1から請求項8のいずれか1項に記載のアーク炉。
- 前記装入チャンバーは、前記炉本体の前記排気口が形成されている側壁に隣接するように設けられ、前記排気口から排出された排ガスにより、装入されている嵩密度が1.0ton/m3以上の原料を予熱する請求項9に記載のアーク炉。
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2013551680A JP6027982B2 (ja) | 2011-12-27 | 2012-12-21 | アーク炉 |
EP12861749.5A EP2799799B1 (en) | 2011-12-27 | 2012-12-21 | Arc furnace |
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EP (1) | EP2799799B1 (ja) |
JP (1) | JP6027982B2 (ja) |
CN (2) | CN203132356U (ja) |
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Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2020085312A (ja) * | 2018-11-22 | 2020-06-04 | トピー工業株式会社 | 電気炉 |
CN112033143A (zh) * | 2019-06-04 | 2020-12-04 | 西冶科技集团股份有限公司 | 一种竖式电弧炉余热回收系统 |
WO2021049125A1 (ja) * | 2019-09-10 | 2021-03-18 | Jfeスチール株式会社 | 電気炉による溶鉄の製造方法 |
WO2021176995A1 (ja) * | 2020-03-06 | 2021-09-10 | スチールプランテック株式会社 | 三相交流アーク炉及び制御方法 |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
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CN203132356U (zh) * | 2011-12-27 | 2013-08-14 | 钢铁普蓝特克股份有限公司 | 电弧炉 |
MY190096A (en) * | 2014-11-05 | 2022-03-28 | Daido Steel Co Ltd | Method of operating electric arc furnace |
US10234206B2 (en) | 2014-11-05 | 2019-03-19 | Daido Steel Co., Ltd. | Electric arc furnace |
CN107120978B (zh) * | 2017-06-21 | 2023-04-07 | 重庆科技学院 | 一种金属冶炼倾泻防护系统 |
CN116900291A (zh) * | 2019-11-15 | 2023-10-20 | 株式会社东热 | 金属熔解装置、金属熔解用筛板和金属熔解方法 |
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Cited By (7)
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JP2020085312A (ja) * | 2018-11-22 | 2020-06-04 | トピー工業株式会社 | 電気炉 |
JP7330688B2 (ja) | 2018-11-22 | 2023-08-22 | トピー工業株式会社 | 電気炉 |
CN112033143A (zh) * | 2019-06-04 | 2020-12-04 | 西冶科技集团股份有限公司 | 一种竖式电弧炉余热回收系统 |
WO2021049125A1 (ja) * | 2019-09-10 | 2021-03-18 | Jfeスチール株式会社 | 電気炉による溶鉄の製造方法 |
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WO2021176995A1 (ja) * | 2020-03-06 | 2021-09-10 | スチールプランテック株式会社 | 三相交流アーク炉及び制御方法 |
Also Published As
Publication number | Publication date |
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EP2799799A1 (en) | 2014-11-05 |
EP2799799A4 (en) | 2015-05-13 |
JPWO2013099807A1 (ja) | 2015-05-07 |
CN203132356U (zh) | 2013-08-14 |
CN103185463B (zh) | 2015-04-01 |
JP6027982B2 (ja) | 2016-11-16 |
CN103185463A (zh) | 2013-07-03 |
EP2799799B1 (en) | 2017-02-01 |
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