US3747912A - Converter for treatment of molten ductile cast iron with vaporizable additives - Google Patents

Converter for treatment of molten ductile cast iron with vaporizable additives Download PDF

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Publication number
US3747912A
US3747912A US00245457A US3747912DA US3747912A US 3747912 A US3747912 A US 3747912A US 00245457 A US00245457 A US 00245457A US 3747912D A US3747912D A US 3747912DA US 3747912 A US3747912 A US 3747912A
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United States
Prior art keywords
chamber
converter
vessel
communication openings
openings
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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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US00245457A
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English (en)
Inventor
M Wernli
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Georg Fischer AG
Original Assignee
Georg Fischer AG
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Publication date
Application filed by Georg Fischer AG filed Critical Georg Fischer AG
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Publication of US3747912A publication Critical patent/US3747912A/en
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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
    • C21C1/00—Refining of pig-iron; Cast iron
    • C21C1/10—Making spheroidal graphite cast-iron

Definitions

  • the vessel has a closable charging opening, for the addition of a vaporizable additive into the chamber, the converging openings having central axes which are directed towards the closable opening.
  • the central axis of the charge opening to the chamber bisects the central axes of the communication openings so that, when a vaporizable substance is introduced through the charge opening into the chamber, molten iron within the vessel will penetrate within the chamber to contact the additives in the chamber upon tipping of the vessel.
  • the present invention relates to a converter for molten ductile cast iron with vaporizable additives, particularly pure magnesium.
  • the converter is formed with a separate chamber within the converter vessel itself, accessible from the outside through a charge opening.
  • the chamber is in communication through communication openings with the interior of the converter vessel, the openings being spaced from each other so that, when the entire converter is tipped, molten cast iron will contact the additives within the chamber.
  • Converters of this type are used in processes in which vaporizable substances, particularly magnesium, 'are to be added to a melt of ductile cast iron. Upon tipping of the converter, the vaporizable substances are brought beneath the surface of the molten iron within the converter, to initiate the vaporization thereof.
  • the additives are located in a separate chamber within the converter, the chamber wall being formed with communication openings for the, molten iron within the converter vessel.
  • Introducing magnesium into molten iron is technologically the most reliable and economically best way to manufacture ductile cast iron articles having graphite solidified in generally spherical form.
  • Various other additives than magnesium may be used, which have a sufficiently'low melting point so that they will vaporize if placed in contact with a cast iron melt, such as calcium, rare earth metals, and others.
  • Apparatus which are formed with an internal receptacle, accessible from the outside, so that additives can be placed therein, the receptacle being located within a region of the base of the interior of the converter.
  • the separating wall of such a receptacle is formed with a plurality of openings.
  • the outside or charge opening to charge the receptacle chamber with additives is closed by means of a plug.
  • the converter vessel has an opening in the outer walls thereof to provide a charge opening for additives. Opposite the opening, an inner wall partitions off a portion of the interior of the vessel to form a chamber for the additive charge. Communication openings are located in the interior wall, so arranged that their central axes converge and are directed towardsthe closable charge opening in the outer wall of the converter. Preferably, the angle formed by the axis of the charge opening in the wall of the converter bisects the angle formed by the central axes of the communication openings.
  • the communication openings themselves may have replaceable inserts therein, so
  • FIG. 1 is a schematic longitudinal crosssectional view of a converter which is provided with a tipping apparatus to tip the converter;
  • FIG. 2 is a fragmentary view, to an enlarged scale, illustrating an insert element for the opening.
  • Converter 15 has a tipping apparatus 16 associated therewith.
  • a holding flange 17 is secured to converter 15 which is removably connected to a carrier frame 18.
  • Carrier frame 18, in turn, is rotatably connected with the tipping arrangement 16.
  • the opening 19 functions both as a fill, as well as a removal opening.
  • a chamber 6 is located within a portion of the base surface 22 limiting the space within the converter vessel. Space 6 is intended to receive a charge of vaporizable additives.
  • the chamber 6 is defined by a wall 5, for example part-circular, which is pierced by openings 3, 4. This chamber 6 is so formed that, when the converter 15 is horizontal, the interior of chamber 6 is out of contact with the melt 20 within the converter, that is, it is located above the level 23 of the melt.
  • converter 15 is tipped into the vertical position, shown schematically in broken lines at 24.
  • Chamber 6 is accessible from the outside through a charge opening 9 which is closed off by a cover, preferably having a quick-release closure, which may include a toggle arrangement.
  • the central axis of the charge opening 9 is preferably so arranged that it bisects the angle of the axes l, 2 of the communication openings 3, 4. This angle is indicated at 7.
  • the charge opening 9 is so dimensioned that the distance 13 of the axis 1, or 2, respectively, to the wall 12 of the charge opening 9 is equal to or greater than the distance 11, or 11', respectively, of the axes 1, 2, to their respective wall portions l4, 14 which define the openings 3, 4 in the wall 5.
  • the openings 3, 4 may be so dimensioned that inserts, preferably replaceable inserts 30 (FIG. 2) can be placed therein.
  • Various sized inserts, or complete closure plugs can be provided, so that the diameter of the communication openings can be selected as desired.
  • the inserts 30 may be made of the same material as the additives to be placed within the chamber 6; these inserts may then be formed as solid plugs, which will melt upon contact with the molten cast iron mass 20 within the converter upon tipping thereof, thus providing access to the charge within chamber 6.
  • the present invention has the advantage that the openings in the wall 5 defining the chamber 6 are easily accessible through the charge opening 9 for the additives, so that the cross-sectional area of the communication openings 4, 5 can be readily controlled and checked before each charge is added to the chamber 6. Thus, reliable charging and treatment of the melt 20 within the converter is ensured. Additionally, the communication openings can easily be inspected visually each time that a new charge is to be placed in the converter so that any reductions in the cross-sectional area of the communication openings 3, 4 can readily be noticed, and corrective measures then taken.
  • Converter for treatment of molten cast iron with vaporizable additives comprising a vessel defined by outer walls (15);
  • interior wall means (5) connected to the outer walls forming a separate chamber (6) within the vessel and having communication openings (3, 4) formed therein to effect fluid communication between the chamber (6) and the interior of the vessel, the outer walls being formed with a closable opening (9) opposite the chamber (6) to provide access to the chamber for placement of vaporizable additives therein and the chamber being located within the interior of the vessel in such position that molten iron therein will penetrate into the chamber to contact additives placed therein upon tipping of the converter vessel;
  • Converter according to claim 1 wherein the distance (11, 11) between the axes (l, 2) of the communication openings (3, 4) and the wall portions (14, 14) of the interior wall means (5) and defining the comm unication openings are substantially equal, or less, than the distance (13) between the axes (1, 2) of the communication openings (3, 4) and the wall portion (12) of the outer wall (15) defining the closable opening (9).
  • Converter according to claim 4 wherein the re placeable insert means are of the same material as the vaporizable additive to be placed within the chamber.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
  • Carbon Steel Or Casting Steel Manufacturing (AREA)
  • Manufacture And Refinement Of Metals (AREA)
US00245457A 1971-04-23 1972-04-19 Converter for treatment of molten ductile cast iron with vaporizable additives Expired - Lifetime US3747912A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH592471A CH522459A (de) 1971-04-23 1971-04-23 Kippbarer Giessbehälter zur Behandlung einer Eisen-Kohlenstoffschmelze mit verdampfbaren Zusätzen

Publications (1)

Publication Number Publication Date
US3747912A true US3747912A (en) 1973-07-24

Family

ID=4301595

Family Applications (1)

Application Number Title Priority Date Filing Date
US00245457A Expired - Lifetime US3747912A (en) 1971-04-23 1972-04-19 Converter for treatment of molten ductile cast iron with vaporizable additives

Country Status (15)

Country Link
US (1) US3747912A (show.php)
JP (1) JPS5143013B1 (show.php)
AU (1) AU475063B2 (show.php)
CA (1) CA963253A (show.php)
CH (1) CH522459A (show.php)
CS (1) CS176191B2 (show.php)
DK (1) DK129632B (show.php)
FI (1) FI53225C (show.php)
FR (1) FR2134010B1 (show.php)
GB (1) GB1394369A (show.php)
IT (1) IT951472B (show.php)
PL (1) PL82361B1 (show.php)
RO (1) RO58482A (show.php)
SE (1) SE397962B (show.php)
ZA (1) ZA722591B (show.php)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4544407A (en) * 1981-03-03 1985-10-01 George Fischer Aktiengesellschaft Process for producing cast iron castings with a vermicular graphite structure
US4666133A (en) * 1985-01-29 1987-05-19 Georg Fischer Aktiengesellschaft Wall member for converter chamber
WO1996009511A1 (en) * 1994-09-20 1996-03-28 Comalco Aluminium Limited Apparatus and method for the supply of molten metal
CN100513586C (zh) * 2007-07-04 2009-07-15 芜湖新兴铸管有限责任公司 一种球墨铸铁管的生产工艺及装置
CN103909236A (zh) * 2013-01-09 2014-07-09 广西玉柴机器股份有限公司 铁液蠕化处理方法及其转包
WO2014198662A1 (fr) 2013-06-10 2014-12-18 Toumi Mourad Procédé et dispositif de traitement d'un métal ou d'un alliage métallique en fusion par une substance additive

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH664580A5 (de) * 1984-12-21 1988-03-15 Fischer Ag Georg Verfahren zum verdampfen von zusatzstoffen in einer metallschmelze.
CH668925A5 (de) * 1985-12-31 1989-02-15 Fischer Ag Georg Behandlungsgefaess zur behandlung von fluessigen metall-legierungen.

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3666449A (en) * 1968-01-26 1972-05-30 Fischer Ag Georg Method for the introduction of volatile additives into a melt

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3666449A (en) * 1968-01-26 1972-05-30 Fischer Ag Georg Method for the introduction of volatile additives into a melt

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4544407A (en) * 1981-03-03 1985-10-01 George Fischer Aktiengesellschaft Process for producing cast iron castings with a vermicular graphite structure
US4666133A (en) * 1985-01-29 1987-05-19 Georg Fischer Aktiengesellschaft Wall member for converter chamber
WO1996009511A1 (en) * 1994-09-20 1996-03-28 Comalco Aluminium Limited Apparatus and method for the supply of molten metal
US5812587A (en) * 1994-09-20 1998-09-22 Comalco Aluminium Limited Apparatus and method for the supply of molten metal
CN100513586C (zh) * 2007-07-04 2009-07-15 芜湖新兴铸管有限责任公司 一种球墨铸铁管的生产工艺及装置
CN103909236A (zh) * 2013-01-09 2014-07-09 广西玉柴机器股份有限公司 铁液蠕化处理方法及其转包
WO2014198662A1 (fr) 2013-06-10 2014-12-18 Toumi Mourad Procédé et dispositif de traitement d'un métal ou d'un alliage métallique en fusion par une substance additive

Also Published As

Publication number Publication date
FR2134010B1 (show.php) 1974-07-05
FI53225B (show.php) 1977-11-30
FI53225C (show.php) 1978-03-10
SE397962B (sv) 1977-11-28
PL82361B1 (show.php) 1975-10-31
RO58482A (show.php) 1975-09-15
GB1394369A (en) 1975-05-14
DK129632B (da) 1974-11-04
JPS5143013B1 (show.php) 1976-11-19
DK129632C (show.php) 1975-04-21
AU4133772A (en) 1973-10-25
CA963253A (en) 1975-02-25
FR2134010A1 (show.php) 1972-12-01
CS176191B2 (show.php) 1977-06-30
AU475063B2 (en) 1976-08-12
IT951472B (it) 1973-06-30
CH522459A (de) 1972-06-30
DE2216796A1 (de) 1972-11-09
ZA722591B (en) 1973-01-31
DE2216796B2 (de) 1976-10-14

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