US3743264A - Steel conversion apparatus - Google Patents

Steel conversion apparatus Download PDF

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Publication number
US3743264A
US3743264A US00165920A US3743264DA US3743264A US 3743264 A US3743264 A US 3743264A US 00165920 A US00165920 A US 00165920A US 3743264D A US3743264D A US 3743264DA US 3743264 A US3743264 A US 3743264A
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US
United States
Prior art keywords
vessel
access opening
opening
exhaust means
enclosure
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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US00165920A
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English (en)
Inventor
A Dortenzo
J Baum
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.)
Verfahrenstechnik Dr Ing Kurt Baum
Pennsylvania Engineering Corp
Original Assignee
Verfahrenstechnik Dr Ing Kurt Baum
Pennsylvania Engineering Corp
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Application filed by Verfahrenstechnik Dr Ing Kurt Baum, Pennsylvania Engineering Corp filed Critical Verfahrenstechnik Dr Ing Kurt Baum
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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
    • C21C5/28—Manufacture of steel in the converter
    • C21C5/38—Removal of waste gases or dust
    • C21C5/40—Offtakes or separating apparatus for converter waste gases or dust

Definitions

  • Certain prior art converter systems employ a smoke hood located directly above the open upper end of the vessel when the latter was in its upright position. However, when such vessels were tilted, their open upper ends were displaced from the smoke hood so that the latter can not effectively prevent pollutants from being discharged into the surrounding atmosphere.
  • the oxygen in basic oxygen converters, the oxygen is introduced into the vessel by means of a lance extending downwardly through the open upper end.
  • the oxygen or other gases are introduced through tuyeres located below the level of molten metal.
  • the oxygen lance was normally off. This was also possible in argon-oxygen converters where the tuyeres are located in the sides of the vessels so that they would be free of metal when the vessel is tilted.
  • a general object of the invention is to provide a new and improved pollution control apparatus for steel conversion vessels.
  • Another object of the invention is to provide apparatus for preventing the discharge of pollutants from steel conversion vessels when the latter are in each of their various alternate positions.
  • a further object of the invention is to provide apparatus for preventing the discharge of pollutants into the surrounding atmosphere from a steel conversion vessel when the latter is being charged, sampled, deslagged or during teeming.
  • the invention comprises a converter vessel having an open upper end, an enclosure substantially surrounding the vessel and having an access opening to permit hot metal or scrap to be charged into the vessel, and a gas withdrawal system for creating an indrat't through the access opening to prevent the outflow of polluting gases from the enclosure.
  • FIG. 1 is a front elevational view, partly in section, of a converter vessel and pollution control system according to the present invention.
  • FIG. 2 shows an alternate embodiment of the apparatus of FIG. 1 with the converter vessel in an alternate position.
  • the vessel 10 is open at its upper end and includes a metallic shell 11 and a refractory lining 12. A plurality of tuyeres 13 are formed through the lower end of the vessel to permit the injection of gasesby means which will be described more fully below.
  • conversion vessels of this type are generally supported in a conventional manner on a trunnion ring 14 which has a trunnion 15 extending from each of its opposite sides.
  • the trunnions 15 are suitably supported in a well-known manner on bearing structures (not shown)-and are coupled to a suitable drive mechanism (not shown) for tilting vessel 10 to each of a plurality of positions as may be required during a process cycle.
  • the vessel 10 is shown to be disposed within a metallic enclosure 16 having a top wall 17 disposed above the open upper end of vessel 10 and side walls 18 extending downwardly from the top wall 17 to substantially ground level. While the enclosure 16 is shown in FIG. 1 to be generally rectangular in horizontal crosssection and the cover 17 is shown to be generally frus' to-pyramidal, it will be appreciated that the enclosure portions may take any convenient shape.
  • a top opening 20 is formed in cover l? for receiving a smoke hood 21 which normally engages the open upper end of vessel 12 when the latter is in its vertical position shown in FIG. 1.
  • Smoke hood 21 may include a conical collar section 22 for engaging the upper end of the vessel 10 and a generally cylindrical section 24 which extends upwardly through opening 20.
  • a smaller cylindrical section 25 extends upwardly from section 24 for telescoping engagement withthe lower end of a discharge pipe 26.
  • the smoke hood assembly 21 is sup ported from a fixed member 28 by threaded shafts 29 which engage suitable fixed nut members (not shown) on hood 21.
  • a drive assembly (not shown) rotates threaded shafts 29 so that the hood assembly 21 may be moved between its vessel engaging position shown in FIG. 1 and its elevated position shown in FIG. 2. It will be appreciated that section 24 and margins of opening 20 and telescoping members 25 and 26 will be constructed and arranged to remain in a substantially sealed relation when the smoke hood is in its various positions.
  • a charge opening 30 is formed at one side of top wall 17 and an access door 31 is suitably mounted thereon for sliding movement between open and closed positions relative to opening 30.
  • one or more access openings 32 and 33 may be formed in the lower end of side walls 18 to permit movement of a transfer car 34 into and out of enclosure 16 on rails 35.
  • the transfer car may be employed to position a slag pot 36 or a teeming ladle 37 beneath the vessel as may be required.
  • Doors 38 and 39 may be suitably mounted on walls 18 for movement between open and closed positions relative to openings 32 and 33 respectively when the position of transfer car 34 permits.
  • the conversion vessel illustrated in FIGS. 1 and 2 is of the bottom blown type having tuyeres 13 which extend through the lower end of vessel 10 and through which suitable gas pipes 40 extend.
  • the other end of pipes 40 engage a manifold 42 disposed in a chamber 43 mounted on the bottom of vessel 10.
  • Manifold 42 is coupled by pipe 44 to receive gases or other material which are to be injected into the hot metal vessel 10.
  • An auxiliary suction system 48 may be coupled to an opening 49 formed in the top wall 17 of enclosure 16 at a point above access opening 30.
  • An auxiliary hood 50 is secured to top wall 17 in surrounding relation to opening 49 and is coupled by a conduit 51 to the suction system (not shown).
  • FIG. 1 illustrates the normal operating position of the vessel 10.
  • the vessel is shown to be disposed generally vertically with the smoke hood assembly 21 in position over the vessels open upper end.
  • Treatment gases and other materials are injected through the tuyeres beneaththe molten metal which may be disposed in the vessel 10 up to height 53.
  • the smoke hood assembly 21 is first elevated from its position shown in FIG. 1 to that shown in FIG. 2 wherein the collar 21 is elevated relative to the upper end of vessel 10.
  • the engagement between the cylindrical section 24 and the opening 20 maintains the latter in a substantially closed condition.
  • a shoulder 55 formed at the junction between the portion 24 and collar 22 will abut the lower surface of the top wall 17.
  • the assembly 21 will therefore remain effective to withdraw pollutants without substantial leakage through opening 20.
  • the vessel 10 is tilted for the purpose of sampling the hot metal or charging the vessel 10 with additional hot metal or scrap
  • the vessel is pivoted in a counterclockwise direction until its open upper end is adjacent access opening 30.
  • the door 31 may then be opened and a charging chute 56, for example, inserted into proximity with the vessel opening.
  • the charging of hot metal or scrap normally causes a substantial quantity of gaseous and particulate pollutants to be generated within the vessel. This condition is aggravated by the fact that the gas supply to vessel 10 must continue while the vessel is tilted so as to prevent a back flow of molten metal into the tuyeres l3 and the gas supply systern.
  • the auxiliary suction system 48 which is positioned above the access opening 30 is operative to cause a slight negative pressure within the enclosure 16 at the opening 30 to cause an inflow of outside air. This prevents the egress of the gaseous and particulate pollutants from enclosure 16 but instead causes them to flow into the auxiliary suction system 48 and the main suction system 21. It has been found in actual practice that the main and auxiliary suction systems must function to create a flow velocity of from 1,000 to 2,000 feet per minute at the opening 30 to prevent the escape of pollutants from the enclosure 16. It is also preferable that hood 50 of the auxiliary system be as close to the opening 30 as possible to maximize its effectiveness.
  • FIG. 2 also illustrates an alternate embodiment of the invention wherein the enclosure 16' terminates at a point above the floor level.
  • the enclosure 16' terminates at a point above the floor level.
  • substantially all of the gaseous and particulate pollutants tend to rise as a result of the intense heat generated in the vessel 10, substantially none escapes around the lower edge of the enclosure 16.
  • a chimney effect is created wherein outside air is drawn below the lower marginal edge of enclosure 16 for discharge through the exhaust system.
  • the pollutants removed from enclosures 16 and 16 through the suction systems according to the invention are treated in conventional gas scrubbing and cleaning apparatus which need not be described here.
  • the pollution control assembly prevents the discharge of particulate and gaseous pollutants from the vessel 10 both when it is in its upright operative position and when it is tilted such as for charging, sampling, deslagging, teeming and the like.
  • the invention has been described with respect to one type of converter vessel, it will be appreciated that it may be applicable to other types of converting vessels as well.
  • the enclosures 16 and 16 may take any convenient shape without deviating from the inventive concept. Accordingly, it is not ulcerended that the invention be limited to the foregoing description, but only by the scope of the appended claims.
  • a converter vessel having a metal receiving opening formed adjacent an upper end thereof
  • an enclosure substantially surrounding said vessel and having means defining an upper wall portion disposed above said vessel and a side wall portion extending generally downwardly from said upper" wall portion, an access opening formed in one of said wall portions,
  • said upper and side wall portions being disposed in a closely surrounding relation to said vessel
  • said vessel being adapted to be tilted about a substantially horizontal axis to position said metal receiving opening adjacent said access opening so that said vessel may be charged
  • exhaust means including means extendingthrough said upper wall portion and engageable with said metal receiving opening when said vessel is in an untilted position for withdrawing pollutants generated in said vessel, said exhaust means also being operative to create an in-draft at said access opening to prevent the escape of said pollutants when said vessel is tilted in its metal receiving position.
  • a converter vessel having a metal receiving opening
  • said vessel being adapted to be tilted about a substantially horizontal axis to position said metal receiving opening adjacent said access opening so that said vessel may be charged
  • exhaust means connected to said enclosure for withdrawing pollutants generated in said vessel and for creating an in-draft at said access opening to prevent the escape of said pollutants when said vessel is tilted in its metal receiving position
  • said exhaust means including first exhaust means disposed above said first position and second exhaust means disposed above said access opening.
  • said first exhaust means includes a hood means which is movable into and out of engagement with said vessel for surrounding said metal receiving opening.
  • a method of controlling the discharge of pollutants from an open topped vessel containing hot metal wherein gases are introduced into said metal through tuyeres located in the lower end of said vessel, the steps of,
  • said vessel being adapted to be tilted about a substantially horizontal axis to position said metal receiving opening adjacent said access opening so that said vessel may be charged
  • first exhaust means extending through said roof portion for engaging said metal receiving opening when said vessel is in an untillted position and second exhaust means disposed above said access opening, said first and second exhaust means being operative to prevent the escape of pollutants when said vessel is tilted in its metal receiving position.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Carbon Steel Or Casting Steel Manufacturing (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
US00165920A 1971-07-26 1971-07-26 Steel conversion apparatus Expired - Lifetime US3743264A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US16592071A 1971-07-26 1971-07-26

Publications (1)

Publication Number Publication Date
US3743264A true US3743264A (en) 1973-07-03

Family

ID=22601021

Family Applications (1)

Application Number Title Priority Date Filing Date
US00165920A Expired - Lifetime US3743264A (en) 1971-07-26 1971-07-26 Steel conversion apparatus

Country Status (13)

Country Link
US (1) US3743264A (xx)
JP (1) JPS5614724B1 (xx)
AU (1) AU469278B2 (xx)
BE (1) BE786662A (xx)
BR (1) BR7205016D0 (xx)
CA (1) CA1016744A (xx)
CS (1) CS195256B2 (xx)
DE (1) DE2233443B2 (xx)
FR (1) FR2147157B1 (xx)
GB (1) GB1403411A (xx)
NL (1) NL170439C (xx)
PL (1) PL82806B1 (xx)
SE (1) SE407076B (xx)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3938788A (en) * 1974-02-02 1976-02-17 Fried. Krupp Huttenwerke Ag Apparatus for the production of metals by a smelting metallurgical process
US4050682A (en) * 1975-03-31 1977-09-27 Pennsylvania Engineering Corporation Method and apparatus for handling off-gases from metal refining vessel
US4076223A (en) * 1975-12-31 1978-02-28 Pennsylvania Engineering Corporation Enclosure for steel converting apparatus
US4094496A (en) * 1975-12-31 1978-06-13 Pennsylvania Engineering Corporation Enclosure for steel converting apparatus
US4097029A (en) * 1975-12-31 1978-06-27 Pennsylvania Engineering Corporation Enclosure for steel converting apparatus
US4190237A (en) * 1977-04-02 1980-02-26 Verfahrenstechnik Dr. Ing. Kurt Baum Apparatus for treating refinery waste gases
US4212453A (en) * 1977-02-21 1980-07-15 Voest-Alpine Aktiengesellschaft Plant for refining pig iron
US4234170A (en) * 1979-06-06 1980-11-18 National Steel Corporation Movable charging emissions control hood for BOF

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2313660C3 (de) * 1973-03-20 1981-09-10 M.A.N. Maschinenfabrik Augsburg-Nürnberg AG, 4200 Oberhausen Mehrschiffige Strahlerzeugungsanlage mit einem oder mehreren Elektrolichtbogenöfen
ZA765943B (en) * 1976-02-19 1977-09-28 American Air Filter Co Exhaust means for converter vessel
AT357580B (de) * 1977-02-04 1980-07-25 Voest Alpine Ag Abzugshaube an einem einen kippbaren konverter aufweisenden blasstand
DE2705565C3 (de) * 1977-02-10 1984-10-11 Mannesmann AG, 4000 Düsseldorf Abgaseinrichtung für kippbare metallurgische Öfen, insbesondere für Stahlwerkskonverter
AT356687B (de) * 1977-02-28 1980-05-12 Voest Alpine Ag Abzugshaube
DE2821379A1 (de) * 1978-05-16 1979-11-22 Baum Verfahrenstechnik Vorrichtung zum auffangen von konverterabgasen
AT357181B (de) * 1978-05-24 1980-06-25 Voest Alpine Ag Konverteranlage mit einem kippbaren konverter- gefaess
AT355071B (de) * 1978-05-24 1980-02-11 Voest Alpine Ag Konverteranlage mit einem metallurgischen gefaess
DE2922765A1 (de) * 1979-06-05 1981-02-19 Metallgesellschaft Ag Verfahren und vorrichtung zur verhinderung des gasaustritts aus der beschickungsoeffnung einer konverter-umkleidung

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2803450A (en) * 1953-09-29 1957-08-20 Pennsylvania Engineering Corp Converter gas cleaning system
US3014255A (en) * 1957-11-15 1961-12-26 Heraeus Gmbh W C Method of operating vacuum induction furnace
US3205810A (en) * 1962-09-04 1965-09-14 Inland Steel Co Adjustable hood construction for metallurgical furnace

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE715184C (de) * 1937-07-03 1941-12-15 Neunkircher Eisenwerk Ag Vorrichtung zum Abdecken der Auslassoeffnungen von Konverterkaminen u. dgl.
DE949293C (de) * 1953-11-29 1956-09-20 August Mueser Konverter-Abzug
DE931597C (de) * 1954-02-26 1955-08-11 Gutehoffnungshuette Sterkrade Konverter-Abgasfang
DE1408153C3 (de) * 1959-12-08 1973-11-15 Fried. Krupp Gmbh, 4300 Essen Verfahren und Vorrichtung zum Abdichten des Spaltes zwischen Konverter und Haube beim Abziehen von Konvertergasen, insbesondere beim Frischen von Roheisen mit Sauerstoff
FR1312160A (fr) * 1961-12-19 1962-12-14 Calderon Automation Inc Procédé et appareillage perfectionnés pour la fabrication de l'acier
US3325160A (en) * 1963-03-06 1967-06-13 Asea Ab Vacuum-enclosed tiltable furnace
FR1420981A (fr) * 1965-01-15 1965-12-10 Demag Ag Installation de dépoussiérage de gaz d'échappement pour convertisseur et procédé pour l'évacuation des gaz
JPS4422321Y1 (xx) * 1966-10-15 1969-09-20
DE1533908A1 (de) * 1967-06-16 1970-02-12 Demag Ag Konverter zur Stahlerzeugung nach dem Sauerstoffaufblasverfahren und Verfahren zur Erzeugung von Stahl
FR1590185A (xx) * 1968-10-04 1970-04-13
US3558116A (en) * 1968-10-07 1971-01-26 Kawasaki Steel Co Waste gas leakage preventive device in the basic oxygen furnace
DE1948677A1 (de) * 1969-09-26 1971-04-01 Baumco Appbau Ges Mbh Vorrichtung zur Erfassung der beim Chargieren von Blasstrahlkonvertern entstehenden Rauchgase

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2803450A (en) * 1953-09-29 1957-08-20 Pennsylvania Engineering Corp Converter gas cleaning system
US3014255A (en) * 1957-11-15 1961-12-26 Heraeus Gmbh W C Method of operating vacuum induction furnace
US3205810A (en) * 1962-09-04 1965-09-14 Inland Steel Co Adjustable hood construction for metallurgical furnace

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3938788A (en) * 1974-02-02 1976-02-17 Fried. Krupp Huttenwerke Ag Apparatus for the production of metals by a smelting metallurgical process
US4050682A (en) * 1975-03-31 1977-09-27 Pennsylvania Engineering Corporation Method and apparatus for handling off-gases from metal refining vessel
US4076223A (en) * 1975-12-31 1978-02-28 Pennsylvania Engineering Corporation Enclosure for steel converting apparatus
US4094496A (en) * 1975-12-31 1978-06-13 Pennsylvania Engineering Corporation Enclosure for steel converting apparatus
US4097029A (en) * 1975-12-31 1978-06-27 Pennsylvania Engineering Corporation Enclosure for steel converting apparatus
US4212453A (en) * 1977-02-21 1980-07-15 Voest-Alpine Aktiengesellschaft Plant for refining pig iron
US4190237A (en) * 1977-04-02 1980-02-26 Verfahrenstechnik Dr. Ing. Kurt Baum Apparatus for treating refinery waste gases
US4234170A (en) * 1979-06-06 1980-11-18 National Steel Corporation Movable charging emissions control hood for BOF

Also Published As

Publication number Publication date
FR2147157B1 (xx) 1976-08-06
PL82806B1 (xx) 1975-10-31
DE2233443B2 (de) 1978-04-27
BR7205016D0 (pt) 1973-06-07
GB1403411A (en) 1975-08-28
NL7210223A (xx) 1973-01-30
CA1016744A (en) 1977-09-06
DE2233443C3 (xx) 1987-01-22
FR2147157A1 (xx) 1973-03-09
BE786662A (fr) 1972-11-16
NL170439B (nl) 1982-06-01
DE2233443A1 (de) 1973-02-15
AU4487872A (en) 1974-01-31
CS195256B2 (en) 1980-01-31
AU469278B2 (en) 1976-02-12
NL170439C (nl) 1982-11-01
SE407076B (sv) 1979-03-12
JPS5614724B1 (xx) 1981-04-06

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