US20120224601A1 - Burner and/or injector panel apparatus, methods of installation and use of the same in a metal-melting furnace, and metal-melting furnace including the same - Google Patents

Burner and/or injector panel apparatus, methods of installation and use of the same in a metal-melting furnace, and metal-melting furnace including the same Download PDF

Info

Publication number
US20120224601A1
US20120224601A1 US13/038,315 US201113038315A US2012224601A1 US 20120224601 A1 US20120224601 A1 US 20120224601A1 US 201113038315 A US201113038315 A US 201113038315A US 2012224601 A1 US2012224601 A1 US 2012224601A1
Authority
US
United States
Prior art keywords
burner
injector
flange
plate
oxygen
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US13/038,315
Other languages
English (en)
Inventor
Yury Eyfa
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Air Liquide Advanced Technologies US LLC
Original Assignee
Air Liquide Advanced Technologies US LLC
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 Air Liquide Advanced Technologies US LLC filed Critical Air Liquide Advanced Technologies US LLC
Priority to US13/038,315 priority Critical patent/US20120224601A1/en
Assigned to AIR LIQUIDE ADVANCED TECHNOLOGIES U.S. LLC reassignment AIR LIQUIDE ADVANCED TECHNOLOGIES U.S. LLC ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: EYFA, YURY
Priority to ES12157600.3T priority patent/ES2646965T3/es
Priority to RU2012107771/02A priority patent/RU2588906C2/ru
Priority to EP12157600.3A priority patent/EP2495519B1/en
Priority to CN201210111940.9A priority patent/CN102676737B/zh
Priority to IN581DE2012 priority patent/IN2012DE00581A/en
Publication of US20120224601A1 publication Critical patent/US20120224601A1/en
Priority to US14/749,052 priority patent/US9500411B2/en
Abandoned legal-status Critical Current

Links

Images

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
    • 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
    • F27B3/205—Burners
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B13/00—Making spongy iron or liquid steel, by direct processes
    • C21B13/12—Making spongy iron or liquid steel, by direct processes in electric furnaces
    • 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
    • C21C5/5211—Manufacture of steel in electric furnaces in an alternating current [AC] electric arc furnace
    • C21C5/5217—Manufacture of steel in electric furnaces in an alternating current [AC] electric arc furnace equipped with burners or devices for injecting gas, i.e. oxygen, or pulverulent materials into the furnace
    • 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
    • F27B3/22—Arrangements of air or gas supply devices
    • F27B3/225—Oxygen blowing
    • 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
    • F27D1/00—Casings; Linings; Walls; Roofs
    • F27D1/12—Casings; Linings; Walls; Roofs incorporating cooling arrangements
    • 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
    • Y02P10/20—Recycling
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49826—Assembling or joining

Definitions

  • the present invention relates to a burner and/or injector panel apparatus, methods of installation and use of the same in a metal-melting furnace, and metal-melting furnace including the same. More particularly, the present invention relates to a sump burner and/or injector panel apparatus, methods of use and installation of the same in a sump area of an electric arc furnace, and an electric arc furnace including the same.
  • EAF electric arc furnace
  • An electric arc furnace is used to make steel by application of an electric arc to melt one or more of scrap metal and/or other alternative iron bearing feed stocks and alloys that are placed within the furnace.
  • One type of EAF has hemispherical lower bowl made of metal. The bottom and sides of the lower bowl are lined with a refractory material forming the hearth. Extending vertically from the bowl are water-cooled sidewalls. Extending between the sidewalls over a molten bath of metal (contained by hearth) is a roof. Electrodes extend through the roof and into the bath.
  • EAFs of the eccentric bottom tapping (EBT) type also include a sump area which is lined with refractory material. The sump area serves the function of containing the molten steel as it is poured from the EAF through a tapping hole.
  • scrap metal or charges
  • these charges further include carbon particulate and other slag forming materials.
  • Other known processes comprise using a ladle for hot or heated metal from a blast furnace and inserting it into the EAF furnace, such as by injection of the DRI by a lance.
  • the electric arc and burners melt the charge burden into a molten pool of metal (melted metal), called an iron carbon melt, which accumulates at the bottom or hearth of the furnace.
  • Thermal energy beyond that supplied by the arc may be provided by burners radially distributed around the furnace.
  • Slag formers such as calcium oxide or magnesium oxide are sometimes injected into the molten pool with one or more injectors.
  • an electric arc furnace proceeds to a refining and/or decarburization phase.
  • the metal melt continues to be heated by the arc until slag forming materials combine with impurities in the iron carbon melt and rise to the surface as slag.
  • the iron carbon melt reaches a critical temperature which allows a carbon boil, the charged carbon in the melt combines with any oxygen present in the bath to form carbon monoxide bubbles which rise to the surface of the bath, forming foaming slag.
  • the foaming slag acts as an insulator throughout the furnace.
  • Further heating and processing is realized by a decarburization process wherein, in typical embodiments of the prior art utilizing advanced or more modem EAF techniques, a high velocity, usually supersonic, flow(s) of oxygen is blown into the metal bath with either lances or burner/lances to decarburize the bath by oxidation of the carbon contained in the bath, forming CO and/or CO 2 when combined with the available or excess carbon in the bath.
  • the burner(s)/lance(s) act to more uniformly melt the charge and lessen, or prevent, overheating and minimize the time required for the melt and time that the arc is created.
  • the dissolved carbon content of the bath can be reduced to a selected or reduced level. It is commonly regarded that if an iron carbon melt is under 2% carbon, the melt becomes steel. EAF steel making processes typically begin with burdens having less than 1% carbon. The carbon in the steel bath is continually reduced until it reaches the content desired for producing a specific grade of steel, such as, for example, and not by way of limitation, down to less than 0.1% for low carbon steels.
  • Additional chemical energy in the form of carbon or coke particles may also be injected by an injector.
  • a single apparatus (burner/injector) may be used to provide the flame and inject particulate carbon/coke or other slagging materials.
  • the carbon or coke flow is injected with the aid of a fluidizing gas flow of compressed air, natural gas, nitrogen, and/or the like.
  • burners Collectively, burners, lances, injectors, burner/lances, and burner/injectors may be referred to as burners and/or injectors.
  • the cold spots are typically formed in areas further away from the furnace arc as scrap located in these areas receives electrical energy at a reduced rate per ton of scrap.
  • a cold spot is the region in line with a bisection of the angle between the electrodes where current density is relatively lower.
  • Another example of a cold spot is the sump area which includes the tapping spout, due to its location away from the arc. Still another cold spot occurs at the slag door due to excessive heat losses to ambient air which infiltrates through this area.
  • Prior art solutions to these challenges have been to incorporate additional burners and/or injectors around the furnace that target the cold spots.
  • Electric arc furnaces equipped with burners and/or injectors located at cold spots have improved uniformity of scrap melting and have reduced build-ups of materials at the cold spots. Their location is chosen to avoid further overheating of hot spots that result from the rapid melting of scrap located between the electrode and the furnace shell. More specifically, the burners and/or injectors are located as far away from hot spots as is practically possible and the burner flame outlet opening direction is chosen so that flame penetration occurs predominantly into the scrap pile located at the cold spots and not to already heated portions of the furnace.
  • the burners and/or injectors are typically radially distributed around the furnace. Because the sump area is flooded with molten metal during tapping, burners and/or injectors are not installed in the sidewalls. Rather, these sump burners and/or injectors are inserted through and mounted to a balcony panel which forms a ceiling over the sump area.
  • the balcony panel is rigidly attached to the sidewalls and may be distinguished from the EAF roof which is retractable from the sidewalls.
  • Burners and/or injectors are subjected to harsh conditions in EAFs, including intense radiative heat, convective heat transfer from hot furnace gases, slagging caused by splashing slag, and blowback of injected oxygen. In order to prolong the useful life of such burners and/or injectors, they are often mounted in panels that at least partially shield them from such harsh conditions. The panels are sometimes water-cooled.
  • burner and/or injector panel apparatus a burner, lance, burner/lance, injector, burner/lance/injector, or burner/injector mounted in such a panel may be referred to as burner and/or injector panel apparatus.
  • oxygen injection for the decarburization must wait until the melting phase of the process is substantially complete before starting high velocity injection of oxygen. This is since the burners cannot effectively deliver high velocity oxygen before then because some portions of unmelted charge may exist between the burners/lances and the liquid metal or metal melt. The oxygen flow would be deflected, potentially causing severe damage to the furnace and burner/injector panel.
  • the discharge velocity of the oxygen stream from the burner and/or injector apparatus is to be chosen to allow the injected jet of oxygen to penetrate the slag and to react with the iron-carbon melt without excessive molten metal splashing on the furnace walls and electrode(s).
  • inadvertent metal splashing does occur and is a common cause of apparatus failure.
  • the angle formed by the jet of oxygen and the horizontal slag surface must not be too small or the injected jet of oxygen may not penetrate into the slag deeply enough. They further understand that the angle of attack must not be too great or blow back may occur with damage to the burner and/or injector apparatus.
  • the supply of carbon flow for injection is obtained from a carbonaceous material dispenser, such as a compressed gaseous carrier comprising compressed air, natural gas, nitrogen, and/or the like.
  • the use of the burners together with carbon and oxygen lances has allowed electric steelmakers to substantially reduce electrical energy consumption and to increase furnace production rate due to the additional heat input generated by the oxidation of carbon, and by significant increases in electric arc thermal efficiency achieved by the formation of a foamy slag layer that insulates the electric arc from heat losses.
  • the foamy slag also stabilizes the electric arc and therefore allows for a higher electrical power input rate.
  • the foamy slag layer is created by CO bubbles which are formed by the oxidation of injected carbon to CO.
  • the increased flow of injected carbon creates increased localized CO generation.
  • most EAF furnace units also comprise a post production means for removing or reducing CO levels in the off gas such as post-combustion burners. Mixing of the CO with oxygen inside of the electric arc furnace is desirable but very difficult to arrange without excessive oxidation of the slag and electrodes. Accordingly, the art field has developed postproduction means for treating the high CO content of the off gas.
  • sump burner and/or injector panel apparatuses are installed outside of the furnace area enclosed by the hearth, they are located a relatively greater distance from the surface of the molten metal and cold spots. Because the flame, oxygen jet, or particle stream must reach farther before it reaches the molten metal or cold spot, the jet becomes relatively less coherent in comparison to jets which are injected from relatively closer locations. Thus, the flame, oxidant, or particles are no longer directed to a relatively small area and the effectiveness of the jet is very limited. Thus, there is a need for improved sump burner and/or injector apparatuses and methods and furnaces using the same that do not suffer from as much loss of jet coherence.
  • burner and/or injector panel apparatuses are typically mounted and located outside the hearth area on the top of the sump in the balcony panel. These sump burner and/or injector panel apparatuses have a fixed position. Thus, the direction of the flame, or injection of the oxidant or particles is fixed and may not be easily changed. More specifically, the angular orientation of the apparatus in each of the x, y, and z axes is fixed. If the direct causes the flame, oxidant or particles to be oriented or injected outside of the target area of the bath, the furnace must be shut down and the burner and/or injector panel apparatus uninstalled from the balcony panel.
  • cooling means are an empty cavity, the inside of which is sprayed with cooling water.
  • Another type of cooling means is a serpentine conduit of cooling water that traverses from left to right and back along a plane that is typically oriented at a right angle to the slag layer. While these often achieve a fully satisfactory cooling effect, such bulky devices result in an overly large, heavy, and expensive panel body.
  • sump burner and/or injector panel apparatuses that avoid these problems.
  • a burner and/or injector panel apparatus for use in metal melting furnaces, comprising: a horizontal plate having a lower surface, an upper surface, and a vertically oriented cylindrical aperture extending through said upper and lower surfaces; a horizontally extending flange having a uniform height along its periphery, a width or diameter of said flange being greater than a diameter of said cylindrical aperture; a main body integrally formed with said flange and extending downwardly therefrom along a main body axis at an angle to a vertical axis of said flange, said main body having a centrally disposed cylindrical chamber extending upper and lower ends thereof; and a burner and/or injector inserted in said main body cylindrical chamber adapted and configured to inject therefrom at least one of a flame, a jet of oxygen, and a stream of carbon particles.
  • Said integrally formed flange and main body are operatively associated with said plate such that: said flange is capable of resting atop said plate while said main body projects downwardly though said cylindrical aperture.
  • Said integrally formed main body is rotatable within said cylindrical aperture while said flange is rotatable atop said plate.
  • Said plate is adapted and configured to retain said plate in fixed position.
  • an electric arc furnace installation comprising: a furnace having a hearth adapted and configured to contain a bath of molten metal; a sump region with a tap hole; sidewalls extending upwardly and around said hearth and sump region; a balcony panel extending horizontally over said sump region and having a cylindrical opening; and the above-provided burner and/or injector panel apparatus, wherein said plate is secured to an exterior surface of said balcony panel, said cylindrical aperture is aligned with said balcony panel cylindrical opening, and said main body extends downwardly through said balcony panel cylindrical opening.
  • the method comprises the following steps. Said plate is secured to an exterior of the balcony panel with an axis of said cylindrical aperture being aligned with an axis of said cylindrical opening. Said main body is inserted through said cylindrical aperture and said cylindrical opening while nestling said flange atop said plate. Said integrally formed flange and main body is rotated until said burner and/or injector is pointing towards a desired target area in said sump region. Said flange is secured to said plate to arrest rotation of said flange with respect to said plate.
  • the method comprises the following step. At least one of fuel and oxidant, oxygen, and carbon particles is injected from said burner and/or injector.
  • the burner and/or injector panel apparatus, electric arc furnace installation, method of installation, and/or method of use may include one or more of the following aspects:
  • FIG. 1 is a top plan view of an inventive furnace with a sump burner and/or injector panel apparatus.
  • FIG. 2 is a perspective view of the furnace of FIG. 1 with parts removed.
  • FIG. 3 is a perspective view of a burner and/or injector panel apparatus of the present invention.
  • FIG. 4 is a top plan view of the burner and/or injector panel apparatus of FIG. 3 illustrating hidden parts.
  • FIG. 5 is an elevation view of the burner and/or injector panel apparatus of FIG. 3 .
  • FIG. 6 is a cross-sectional view of the burner and/or injector panel apparatus of FIG. 3 .
  • an electric arc furnace includes a hearth 7 of ceramic material lining a lower shell 15 of metal.
  • the hearth 7 is configured and adapted to contain a molten bath of metal.
  • an upper shell comprising sidewalls 5 extending upwardly from adjacent a peripheral portion of the hearth 7 .
  • Three electrodes 9 extend through roof 17 and into the molten bath.
  • a sump area 11 is lined with refractory material and includes a tapping hole 13 . The sump area 11 is typically crescent shaped.
  • a lower portion of the sidewalls 5 adjacent a peripheral edge of the sump area 11 do not extend as high as other portions of the sidewalls 5 not adjacent the sump area 11 . Rather, they extend only partially upward to meet at a peripheral arcuate edge of balcony panel 19 .
  • the balcony panel 19 provides a ceiling over the sump area 11 .
  • An upper portion of sidewalls 5 adjacent the sump area 11 extends from the arcuate edge of balcony panel 19 closest to the hearth 7 upwardly towards roof 17 .
  • a burner and/or injector panel apparatus 21 Installed through an opening in balcony panel 19 is a burner and/or injector panel apparatus 21 .
  • the burner and/or injector panel apparatus 21 may be positioned and oriented in such a way as to direct a flame towards scrap or charge in the sump area 11 or towards the metal bath adjacent the sump area 11 .
  • the burner and/or injector panel apparatus 21 may be positioned and oriented in such a way as to direct a flame of fuel and oxidant or inject oxygen and/or carbon particles into a desired target area of the molten metal bath adjacent the sump area 11 .
  • the burner and/or injector panel apparatus 21 includes a flange 33 disposed at an upper end thereof that is integrally formed with a main body 23 disposed at a lower end thereof.
  • An axis 37 of the flange 33 forms an angle ⁇ with an axis 35 of body 23 .
  • Extending through the flange 33 and the body 23 along the axis 35 is a cylindrical chamber 25 .
  • Flange 33 rests upon a plate 39 .
  • Plate 39 includes cylindrical aperture that is sized to correspond to an opening in water-cooled panel 41 .
  • Plate 39 also includes one or more upwardly projecting studs 45 and one or more corresponding retaining clips 43 secured to studs 45 with one or more corresponding fasteners 47 .
  • the plate 39 , projecting stud(s) 45 and retaining clip(s) 43 may be made of any metal or metal alloy suitable for metal melting furnaces.
  • the flange 33 could be provided with curved slots in a circumferential portion thereof. Accessible through the curved slots could be holes threaded in the plate 39 . One or more bolts could be inserted into one or more slots and threaded into the corresponding hole in plate 39 . Tightening the bolt would allow the flange 33 to be rigidly secured to the plate 39 .
  • the flange 33 and main body 23 also includes a cooling circuit having an inlet 24 , a downward leg 26 which leads to a helical portion 28 formed in a circumferential portion of body 23 around the cylindrical chamber 25 .
  • a terminal end of the helical portion 28 leads to a return leg 30 which in turn leads to an outlet 32 .
  • the water-cooled flange 33 and main body 23 may be formed of any metal or metal alloy suitable for use in metal-melting furnaces, especially EAFs. Typically, it is made of copper or copper alloy.
  • the under surface of flange 33 exposed to furnaces gases is typically covered with a soft refractory material.
  • the co-axial cylindrical chamber 25 may have a constant diameter from its upper end to its lower end. Typically, it has a larger inside diameter over most of the length of the cylindrical body 23 and tapers inwardly at an intermediate section 27 from the larger inside diameter to a smaller inside diameter to terminate at a terminal section 29 . Inserted into the co-axial cylindrical chamber 25 is a burner and/or injector body 31 .
  • the main body 23 may be configured in a wide variety of shapes. Typically, it is cylindrical.
  • the burner and/or injector body 31 may be configured and adapted in a number of different ways: as a burner, as an injector, or as a combined burner/injector.
  • a burner as an injector
  • a combined burner/injector One of ordinary skill in the art will recognize that various types of burners, injectors, and burner/injectors are known in the art and that the burner and/or injector 31 may be any of those well known structures.
  • the burner is generally configured and adapted to inject fuel (such as natural gas, propane, or fuel oil) and an oxidant (such as air, oxygen, or air and oxygen) for combustion thereof.
  • oxidant such as air, oxygen, or air and oxygen
  • One type of burner/injector is generally configured and adapted to inject fuel and an oxidant or combustion thereof as well as a supersonic jet of oxygen.
  • burner/injector is generally configured and adapted to inject fuel and an oxidant for combustion thereof as well as a stream of carbon particles.
  • Still another type of burner/injector is generally configured and adapted to inject fuel and an oxidant for combustion thereof as well as a supersonic jet of oxygen and a stream of carbon particles.
  • the injector may be an oxygen lance or a nozzle adapted and configured to inject a stream of carbon particles.
  • Typical examples of burners or burner/injectors are those described by U.S. Pat. No. 5,599,375, U.S. Pat. No. 4,622,007, U.S. Pat. No. 5,788,921, and U.S. Pat. No. 5,858,302.
  • burners, burner/injectors, and injectors include the PyretronTM Burner, the PyrOx Burner, and the PyreJetTM Burner or AlarcJet Nozzle available from ACI located in Kennesaw, Ga., USA.
  • the burner, burner/injector, or injector may be made of any metal or metal alloy and may or may not be made of the same material as the flange 33 and main body 23 .
  • the flange 33 is adapted and configured to allow up to 360° of rotation on top of plate 39 .
  • the flange 33 is cylindrical so as to allow easily rotatability through maintenance of a substantially uniform distance in between a circumferential surface thereof and the projecting stud(s) 45 . Because the main body 23 projects downwardly at an angle ⁇ , the diameter of the cylindrical aperture of the plate 39 is made large enough to allow the flange 33 and main body 23 to be rotated 360° without the main body 23 impinging upon an inner surface of the opening in the water-cooled furnace panel.
  • the diameter of the cylindrical aperture of the plate 39 is also large enough to allow a clearance adjustment device to tip the flange 33 and main body 23 to its side, again without the main body 23 impinging upon an inner surface of the opening in the water-cooled panel.
  • the clearance adjustment device may be a wedge 49 or any other known lever that is inserted in between flange 33 and plate 39 at any point of the circumference of the flange 33 .
  • the clearance adjustment device could also be one or more bolts that threadingly engage the flange 33 at a circumferential portion thereof and which bear against the upper surface of the plate 39 . As such bolts are threaded into or out of the flange 33 , the lower ends force the flange 33 away or towards from the plate 39 and thus increase or decrease the clearance at that point. Any number of these threaded bolts could be used to increase or decrease the clearance at any number of points in between the flange 33 and plate 39 .
  • the diameter of flange 33 is greater than the diameter of the cylindrical aperture formed in plate 39 and the opening in the water-cooled furnace panel through which the apparatus 21 is installed. This difference in diameters allows the flange 33 to be rotated within the aperture without falling into the furnace.
  • the angular orientation of the main body 23 and flange 33 may be fixed by tightening fastener(s) 47 to compress the flange 33 in between clip(s) 43 and plate 39 .
  • the circumferential surface of flange 33 may be shaped in a wide variety of configurations.
  • the flange 33 may still have a constant height, it may instead be configured to have multiple lobes projecting outward from the center and rotated so that one or more of the lobes are retained in between the clip(s) 43 and plate 39 .
  • the cooling circuit may be formed in the main body 23 and flange 33 in one of two ways.
  • a portion of a metal or metal alloy pipe (such as copper or copper alloy) is bent into a helical coil.
  • the helically-coiled pipe is inserted into and fixed to the inside of a casting form for shaping the inner body 23 and flange 33 .
  • Molten metal is poured into the casting form.
  • the inlet 24 and outlet 32 are formed in the surface of the cast piece in a known manner.
  • a helically-shaped sand core of casting sand and binder is molded.
  • the sand core is then inserted into and fixed to the inside of a casting form for shaping the inner body 23 and flange 33 .
  • Molten metal is poured into the casting form.
  • the casting sand is removed from the thus-shaped helical cooling circuit and the inlet 24 and outlet 32 are formed in the surface of the cast piece in a known manner.
  • the apparatus 21 may be installed as follows.
  • an opening is made in horizontal furnace wall 41 .
  • Plate 39 is placed over the opening in wall 41 .
  • Plate 39 is positioned to coaxially align the opening in wall 41 with the cylindrical aperture in plate 39 .
  • Plate 39 is secured to wall 41 with any means known in the art, such as, for example, with refractory plastic.
  • the main body 23 portion of the integrally-formed main body 23 and flange 33 is extended down through the opening in wall 41 and cylindrical aperture in plate 39 with the axis 35 directed towards a desired target area for a flame or injection of a stream of oxygen or carbon particles from burner and/or injector 31 .
  • the integrally-formed main body 23 and flange 33 is then positioned to coaxially align flange 33 with the cylindrical aperture in plate 39 and the opening in the wall 41 .
  • Retaining clip(s) 43 is placed in overlapping relationship with flange 33 and fastener(s) 47 is tightened to securely hold flange 33 in between retaining clip(s) 43 and plate 39 .
  • a clearance adjustment device as described above may be utilized to adjust the clearance between the plate 39 and flange 33 in order to tip the integrally-formed main body 23 and flange 33 to desired pitch and roll angles.
  • Burner and/or injector 31 is placed within cylindrical chamber 25 and connected, as appropriate, to valve trains for fuel and oxidant (such as oxygen, air or both oxygen and air), a valve train for oxygen, and/or to a supply of carbon particles. Finally, a source of coolant (typically water) is connected to inlet 32 .
  • fuel and oxidant such as oxygen, air or both oxygen and air
  • oxidant such as oxygen, air or both oxygen and air
  • a valve train for oxygen and/or to a supply of carbon particles.
  • a source of coolant typically water
  • the apparatus 21 may be adjusted in either or both of two ways in order to achieve the desired direction.
  • the fastener(s) 47 is loosened in order to release the grip of the retaining clip(s) 43 and plate 39 on the flange 33 .
  • the wedge 49 may be driven in between the plate 39 and the flange 33 in order to tilt the apparatus 21 from the horizontal plane of the furnace wall 41 . The farther the wedge 49 is driven in between the plate 39 and flange 33 , the greater the amount of tiling will be achieved.
  • the integral main body 23 and flange 33 may also be rotated about axis 37 anywhere from 0 to 360°. Between the wedging and rotation, the desired area of the molten bath of metal may be properly targeted by the flame, jet of oxygen, and/or stream of carbon particles. Once the desired direction and targeting is achieved, the fastener(s) is tightened in order to once again secure the position of the flange 33 and main body 23 with respect to the plate 39 and furnace wall 41 .
  • a burner flows of fuel (such as natural gas or fuel oil) and oxidant (such as oxygen, air, or both oxygen and air) are injected out the end of the terminal portion 29 and combust inside the furnace.
  • oxidant such as oxygen, air, or both oxygen and air
  • a jet of oxygen is injected out the end of the terminal portion 29 and penetrates the molten bath of metal.
  • the oxygen jet penetrates through the slag layer.
  • a fluidized stream of carbon particles is injected out the end of the terminal portion 29 and penetrates the bath of molten metal, and if a layer of slag is present, penetrates through the layer of slag into the molten metal.
  • apparatus 21 will operate when a combination of burner and oxygen injector, burner and carbon particle injector, or burner, oxygen injector, and carbon particle injector is selected.
  • the present invention yields several advantages.
  • the burner and/or injector 31 is better cooled because the cooling circuit extends 360° around the cylindrical chamber 25 instead of traversing only on one side thereof in a serpentine manner like conventional burner/injector panels.
  • the apparatus 21 absorbs less heat from the furnace because of the optimized surface to volume ratio afforded by a cylinder.
  • the apparatus 21 yields the ability to heat or inject oxygen or carbon particles into practically any spot within the reach of the flame, jet of oxygen, or stream of carbon particles. This is due to its ability to be tilted and/or rotated.
  • Conventional burner and/or injectors have a fixed position once they are installed at the furnace wall 41 . This fixed position is not alterable unless the opening in the furnace wall 41 is significantly modified. This is because their square or rectangular configuration does not allow rotation within the square or rectangular opening in the furnace wall 41 .

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Furnace Details (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Muffle Furnaces And Rotary Kilns (AREA)
US13/038,315 2011-03-01 2011-03-01 Burner and/or injector panel apparatus, methods of installation and use of the same in a metal-melting furnace, and metal-melting furnace including the same Abandoned US20120224601A1 (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
US13/038,315 US20120224601A1 (en) 2011-03-01 2011-03-01 Burner and/or injector panel apparatus, methods of installation and use of the same in a metal-melting furnace, and metal-melting furnace including the same
ES12157600.3T ES2646965T3 (es) 2011-03-01 2012-02-29 Método para instalar un aparato de panel de quemador y/o inyector y método para tratar metal usando el mismo
RU2012107771/02A RU2588906C2 (ru) 2011-03-01 2012-02-29 Способ монтажа панельного устройства с горелкой и/или инжектором
EP12157600.3A EP2495519B1 (en) 2011-03-01 2012-02-29 Method of installing a burner and/or injector panel apparatus and method of treating metal using the same
CN201210111940.9A CN102676737B (zh) 2011-03-01 2012-03-01 安装燃烧器和/或喷射器面板装置的方法和使用该方法处理金属的方法
IN581DE2012 IN2012DE00581A (zh) 2011-03-01 2012-03-01
US14/749,052 US9500411B2 (en) 2011-03-01 2015-06-24 Burner and/or injector panel apparatus, methods of installation and use of the same in a metal-melting furnace, and metal-melting furnace including the same

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US13/038,315 US20120224601A1 (en) 2011-03-01 2011-03-01 Burner and/or injector panel apparatus, methods of installation and use of the same in a metal-melting furnace, and metal-melting furnace including the same

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US14/749,052 Division US9500411B2 (en) 2011-03-01 2015-06-24 Burner and/or injector panel apparatus, methods of installation and use of the same in a metal-melting furnace, and metal-melting furnace including the same

Publications (1)

Publication Number Publication Date
US20120224601A1 true US20120224601A1 (en) 2012-09-06

Family

ID=45812712

Family Applications (2)

Application Number Title Priority Date Filing Date
US13/038,315 Abandoned US20120224601A1 (en) 2011-03-01 2011-03-01 Burner and/or injector panel apparatus, methods of installation and use of the same in a metal-melting furnace, and metal-melting furnace including the same
US14/749,052 Active US9500411B2 (en) 2011-03-01 2015-06-24 Burner and/or injector panel apparatus, methods of installation and use of the same in a metal-melting furnace, and metal-melting furnace including the same

Family Applications After (1)

Application Number Title Priority Date Filing Date
US14/749,052 Active US9500411B2 (en) 2011-03-01 2015-06-24 Burner and/or injector panel apparatus, methods of installation and use of the same in a metal-melting furnace, and metal-melting furnace including the same

Country Status (6)

Country Link
US (2) US20120224601A1 (zh)
EP (1) EP2495519B1 (zh)
CN (1) CN102676737B (zh)
ES (1) ES2646965T3 (zh)
IN (1) IN2012DE00581A (zh)
RU (1) RU2588906C2 (zh)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20170208653A1 (en) * 2016-01-19 2017-07-20 Fast Technology S.R.L. Device for positioning at least one electrode for smelting furnaces
US11448398B2 (en) * 2018-06-18 2022-09-20 Systems Spray-Cooled, Inc. Burner panel for a metallurgical furnace

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3710606A4 (en) * 2017-11-16 2021-07-28 Berry Metal Company LIQUID-COOLED HOUSING SYSTEM FOR INSTRUMENTS IN A METAL PRODUCTION FURNACE

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5411393A (en) * 1993-01-04 1995-05-02 Southwire Company Premix burner for furnace with gas enrichment
US20010043639A1 (en) * 2000-02-10 2001-11-22 Shver Valery G. Method for melting and decarburization of iron carbon melts
US20020001332A1 (en) * 2000-02-10 2002-01-03 Shver Valery G. Mounting arrangement for auxiliary burner or lance
US20040174920A1 (en) * 2002-12-19 2004-09-09 Alex Popenov Method and apparatus for spatial energy coverage
US20040213318A1 (en) * 2003-03-07 2004-10-28 Strelbisky Michael J. Burner and/or lance mounting assembly
US20090151510A1 (en) * 2000-02-10 2009-06-18 Process Technology International, Inc. Mounting enclosure for burners and particle injectors on an electric arc furnace
US8520714B2 (en) * 2008-03-28 2013-08-27 Air Liquide Advanced Technologies U.S. Llc Burner/injector panel apparatus

Family Cites Families (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6999A (en) 1850-01-08 Car- wheel
US4A (en) 1836-08-10 Stock
US3100461A (en) * 1960-04-26 1963-08-13 Inland Steel Co Adjustable mounting for adjustable powdered fuel burner
SU148074A1 (ru) * 1961-04-06 1961-11-30 С.Ф. Александров Способ сжигани высококалорийного топлива в мартеновских печах
US3451456A (en) * 1967-04-26 1969-06-24 Standard Pressed Steel Co Bolt with restrainer
US4703336B2 (en) 1978-03-16 1993-06-01 Photodetection and current control devices
US4622007A (en) 1984-08-17 1986-11-11 American Combustion, Inc. Variable heat generating method and apparatus
DE8908577U1 (zh) * 1989-07-14 1989-09-07 Badische Stahlwerke Ag, 7640 Kehl, De
JPH0356613A (ja) * 1989-07-25 1991-03-12 Nikko:Kk 製鋼用電気炉の助燃装置
FR2663723B1 (fr) 1990-06-20 1995-07-28 Air Liquide Procede et installation de fusion d'une charge en four.
US5471495A (en) 1991-11-18 1995-11-28 Voest-Alpine Industrieanlagenbeau Gmbh Electric arc furnace arrangement for producing steel
EP0625685B1 (en) 1993-05-17 1999-07-21 DANIELI & C. OFFICINE MECCANICHE S.p.A. Electric arc furnace with alternative sources of energy and operating method for such electric furnace
FR2706026B1 (fr) 1993-06-02 1995-07-28 Air Liquide Four de fusion de charge et injecteur de gaz.
ES2119274T3 (es) * 1994-06-10 1998-10-01 Danieli Off Mecc Quemador rotativo.
US5599375A (en) 1994-08-29 1997-02-04 American Combustion, Inc. Method for electric steelmaking
US5714113A (en) 1994-08-29 1998-02-03 American Combustion, Inc. Apparatus for electric steelmaking
FR2728254B1 (fr) * 1994-11-08 1997-01-31 Saint Gobain Vitrage Procede et dispositif pour la fusion du verre
IT1280115B1 (it) 1995-01-17 1998-01-05 Danieli Off Mecc Procedimento di fusione per forno elettrico ad arco con sorgenti alternative di energia e relativo forno elettrico ad arco
JPH1137663A (ja) * 1997-05-23 1999-02-12 Nkk Corp 冷鉄源の溶解方法および溶解設備
US6342086B1 (en) * 1999-02-16 2002-01-29 Process Technology International, Inc. Method and apparatus for improved EAF steelmaking
US6372010B1 (en) 1999-12-10 2002-04-16 Process Technology International, Inc. Method for metal melting, refining and processing
US6289035B1 (en) 2000-02-10 2001-09-11 Valery G. Shver Mounting arrangement for auxiliary burner or lance
US6212218B1 (en) 2000-04-25 2001-04-03 Process Technology International, Inc. Reusable lance with consumable refractory tip
US20040134794A1 (en) 2002-10-22 2004-07-15 Sundaram V S Meenakshi Systems and methods for generating polysulfides
DE102006012005A1 (de) * 2006-03-16 2007-09-20 Sms Demag Ag Schmelz-Aggregat, insbesondere Injektor, Blaslanze oder Brenner

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5411393A (en) * 1993-01-04 1995-05-02 Southwire Company Premix burner for furnace with gas enrichment
US20010043639A1 (en) * 2000-02-10 2001-11-22 Shver Valery G. Method for melting and decarburization of iron carbon melts
US20020001332A1 (en) * 2000-02-10 2002-01-03 Shver Valery G. Mounting arrangement for auxiliary burner or lance
US20090151510A1 (en) * 2000-02-10 2009-06-18 Process Technology International, Inc. Mounting enclosure for burners and particle injectors on an electric arc furnace
US20040174920A1 (en) * 2002-12-19 2004-09-09 Alex Popenov Method and apparatus for spatial energy coverage
US20040213318A1 (en) * 2003-03-07 2004-10-28 Strelbisky Michael J. Burner and/or lance mounting assembly
US8520714B2 (en) * 2008-03-28 2013-08-27 Air Liquide Advanced Technologies U.S. Llc Burner/injector panel apparatus

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20170208653A1 (en) * 2016-01-19 2017-07-20 Fast Technology S.R.L. Device for positioning at least one electrode for smelting furnaces
US11448398B2 (en) * 2018-06-18 2022-09-20 Systems Spray-Cooled, Inc. Burner panel for a metallurgical furnace

Also Published As

Publication number Publication date
CN102676737A (zh) 2012-09-19
EP2495519B1 (en) 2017-09-20
CN102676737B (zh) 2016-08-10
EP2495519A1 (en) 2012-09-05
RU2012107771A (ru) 2013-09-10
US20150292801A1 (en) 2015-10-15
ES2646965T3 (es) 2017-12-18
IN2012DE00581A (zh) 2015-07-17
RU2588906C2 (ru) 2016-07-10
US9500411B2 (en) 2016-11-22

Similar Documents

Publication Publication Date Title
US7858018B2 (en) Mounting enclosure for burners and particle injectors on an electric arc furnace
US7951325B2 (en) Methods of implementing a water-cooling system into a burner panel and related apparatuses
CA2198901C (en) Method and apparatus for electric steelmaking
US5714113A (en) Apparatus for electric steelmaking
US7824604B2 (en) Methods of implementing a water-cooling system into a burner panel and related apparatuses
CA2719933C (en) Burner/injector panel apparatus
US6749661B2 (en) Method for melting and decarburization of iron carbon melts
JPS62227023A (ja) 鋼製造装置
CA2167140A1 (en) Melting method for an electric arc furnace with alternative sources of energy and relative electric arc furnace
US9500411B2 (en) Burner and/or injector panel apparatus, methods of installation and use of the same in a metal-melting furnace, and metal-melting furnace including the same
JP7200649B2 (ja) 精錬用ランス装置、電気炉および製鋼方法
US8557018B2 (en) Process for improving energy supply to a scrap bulk
WO2009087183A1 (en) Cooling of a metallurgical smelting reduction vessel
JP2004100028A (ja) 着熱効率の優れた冷鉄源溶解方法
JPS61195909A (ja) 転炉内での屑鉄溶解方法

Legal Events

Date Code Title Description
AS Assignment

Owner name: AIR LIQUIDE ADVANCED TECHNOLOGIES U.S. LLC, TEXAS

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:EYFA, YURY;REEL/FRAME:026454/0836

Effective date: 20110520

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION