EP0016273A1 - Verfahren und Vorrichtung zur Herstellung metallischer Zusammensetzungen aus mindestens zwei Bestandteilen, wobei die Siedetemperatur eines Bestandteiles unter der Schmelztemperatur des anderen Bestandteiles liegt - Google Patents

Verfahren und Vorrichtung zur Herstellung metallischer Zusammensetzungen aus mindestens zwei Bestandteilen, wobei die Siedetemperatur eines Bestandteiles unter der Schmelztemperatur des anderen Bestandteiles liegt Download PDF

Info

Publication number
EP0016273A1
EP0016273A1 EP19790300491 EP79300491A EP0016273A1 EP 0016273 A1 EP0016273 A1 EP 0016273A1 EP 19790300491 EP19790300491 EP 19790300491 EP 79300491 A EP79300491 A EP 79300491A EP 0016273 A1 EP0016273 A1 EP 0016273A1
Authority
EP
European Patent Office
Prior art keywords
constituent
magnesium
iron
chamber
melt
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.)
Granted
Application number
EP19790300491
Other languages
English (en)
French (fr)
Other versions
EP0016273B1 (de
Inventor
Richard Aloysius Flinn
Paul Karl Trojan
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.)
FLINN ALOYSIUS R
Original Assignee
FLINN ALOYSIUS R
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 FLINN ALOYSIUS R filed Critical FLINN ALOYSIUS R
Priority to DE7979300491T priority Critical patent/DE2966152D1/de
Priority to EP19790300491 priority patent/EP0016273B1/de
Publication of EP0016273A1 publication Critical patent/EP0016273A1/de
Application granted granted Critical
Publication of EP0016273B1 publication Critical patent/EP0016273B1/de
Expired legal-status Critical Current

Links

Images

Classifications

    • 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
    • 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
    • C21C1/02—Dephosphorising or desulfurising

Definitions

  • the present invention relates to a process and apparatus for the production of a metallic composition comprising a melt containing at least two metallic constituents one of which has a melting temperature which exceeds the boiling temperature of the other at atmospheric pressure.
  • the invention relates more specifically to a process and apparatus for the production of a solid metallic composition.
  • Nodular iron is superior to gray cast iron containing graphite flakes in that it has twice the tensile strength and twenty times the ductility of gray cast iron.
  • a problem in producing nodular iron however is that magnesium reacts violently iron and is soluble in iron only to a small degree.
  • the magnesium has been introduced in various combined forms such as ferrosilicon magnesium (see U.S. Patents 3,177,071, 3,290,142, 3, 367, 771 and 3, 375, 104), coke or charcoal impregnated with magnesium (see U.S. Patents 3, 321, 304 and 3, 598, 572), combinations of rare earths and magnesium and alloys of magnesium and nickel or copper (see U.S. Patents 3,030, 205 and 3, 544, 312).
  • nodulizing agents are deficient in several respects.
  • those agents which include substantial amounts of silicon or other low density elements tend to float in the ladle and thus require expensive and cumbersome apparatus for introduction into the bath of molten iron.
  • nodulizing agents including substantial amounts of nickel may have a density approaching that of molten iron and thus will have little tendency to float in the ladle.
  • such nodulizing agents may be expensive and may introduce undesirable elements into the molten iron.
  • a process for the production of a solid metallic composition comprising a melt containing at least two metallic constitutents one of which has a melting temperature which exceeds the boiling temperature of the other at atmospheric pressure, said process being characterized by forming from a liquid melt of said one constituent a liquid body having a depth at least sufficient to produce a static pressure head therein in excess of the vapor pressure of said other constituent at the temperature of the melt, introducing said one constituent as a liquid melt at a static pressure head in excess of the vapor pressure of said other constituent into a chamber, metering a supply of said other constituent at a predetermined rate into said chamber, retaining said one and said other constituents in said chamber to form a mixture of said constituents in which at least a portion of said other constituent is in solution with said one constituent, and withdrawing said mix, ture from said chamber at a rate and pressure to ensure non-volatization of the other constituent.
  • the other constituent comprises a nodulizing agent
  • substantially full recovery of the added nodulizing agent is possible i.e. none of the nodulizing agent, for example magnesium, is lost through vaporization and flaring, and introduces no spurious materials into the melt.
  • the metallic composition may be produced in the form of an ingot, a bar or as shot or pellets. Where the product takes the form of a bar or shot, the process may be conducted in a continuous manner while where the product is an ingot, the process is usually a batch process.
  • the molten mixture is solidified after withdrawal from the chamber, at a static pressure head in excess of the vapor pressure of said constituent and at a rate sufficient to retain a portion of the other constituent rejected from said mixture during cooling thereof as a dispersion of small particles in a matrix of said one constituent.
  • the solid metallic-composition is a ferro-magnesium product it may contain in addition to magnesium and iron, also carbon and silicon and other incidental elements, for example, 4% carbon and 1% silicon and thus comprise a cast iron composition containing substantial amounts of magnesium; i.e. more than 0.40% magnesium, preferably more than 1.00% magnesium.
  • the ferro-magnesium product of the invention is characterized by the fact that, in addition to the small amount of magnesium dissolved by the iron, the major portion of the magnesium appears as a dispersion of magnesium in a matrix of iron.
  • Such a product is ideally suited as a nodulizing agent sincer, in the presence of additional liquid iron the dispersed magnesium particles will tend to dissolve rather than form large bubbles of vapor which may easily escape from a molten iron bath.
  • the effect of the particles of magnesium dispersed in the iron matrix leads to efficient solution of the magnesium in a liquid iron bath. This, of course, is in sharp contrast to the use of ingots or bars of pure magnesium which melt and vaporize in the presence of molten iron under atmospheric or slightly super atmospheric pressures.
  • the dispersion of particles of magnesium in the iron matrix is formed by rapidly cooling the mixture of magnesium and iron.
  • the step of rapid cooling may be performed in a chill mold if the process is to be performed as a batch process.
  • the process is performed as a continuous process, in which case the step of rapid cooling comprises either the conversion of the mixture into shot or pellets in a shotting chamber or the casting of the mixture into billets or bars by a continuous casting process.
  • the ferro-magnesium product may be in the form of ingots, billets, bars, shot or pellets.
  • an apparatus for the production of a solid metallic composition containing at least two metallic constituents wherein the melting temperature of one of the constituents exceeds the boiling temperature of a second constituent at atmospheric pressure characterized by furnace means adapted to form a liquid body from said one constituent having a depth at least sufficient to produce a static pressure therein in excess of the vapor pressure of said second constituent at the temperature of said liquid body, said furnace means communicating with a reaction chamber at a location in said furnace means wherein the static pressure is in excess of the vapor pressure of said second constituent at the temperature of said liquid body, second constituent melting means communicating with said reaction chamber means at one end thereof, and means adapted rapidly to solidify said metallic composition communicating with said reaction chamber at the opposite end thereof.
  • the effective height of the furnace means is determined by the operating temperature of the one constituent, preferably iron, and is selected so that the static head at the reactor is greater than the vapor pressure of the second constituent, preferably magnesium, at the predetermined operating temperature.
  • the furnace means may be fitted with controllable heating means to insure that the predetermined temperature of the molten iron is maintained.
  • the reaction chamber is within a reactor which is a closed, and preferably heated, vessel designed to promote the admixture of the liquid iron and magnesium to promote dissolution and dispersion of magnesium by the liquid iron and to inhibit any reverse flow of the mixture and solution backwards into the furnace.
  • the second constituent melting means preferably comprising a magnesium adder includes a heated chamber adapted to contain and melt a number of magnesium bars. The melted magnesium is then metered into the reactor as a thin stream by means of the pressure exerted at one end of the chamber by an inert gas. Alternatively, magnesium may be introduced into the reactor in the form of a solid magnesium wire.
  • the reactor is sized in proportion to the furnace and magnesium adder, and the reactor and adder are specially adapted to promote the dissolution and dispersion of a maximum amount of magnesium into molten iron.
  • 10 indicates a columnar furnace communicating at its upper end with a heated tundish 12 fed from a source of molten iron or hot metal 14. At its lower end, the columnar furnace 10 communicates with a heated reactor 16. A magnesium adder 18 delivers molten magnesium to one end of the reactor 16 and ferro-magnesium is withdrawn from the opposite end of the reactor. As shown in Fig. 1, the ferro-magnesium product is then solidified into bars or ingots in a pressurized mold 20, which is, preferably water or air cooled. Alternatively, the ferro-magnesium product may be formed into shot or pellets in a shotting chamber 22 (Fig. 7) or as a bar or billet in a continuous casting machine 24 (Fig. 8).
  • the columnar furnace 10 comprises a hollow cylindrical pipe-like core 26 preferably formed from graphite and surrounded by a heater 28.
  • the heater 28 may comprise a ceramic tube 30 about which a resistance element 32 is wound.
  • the heating element 32 may comprise a series of separate and individually variable heaters whereby a desired temperature profile may be established in the furnace.
  • Refractory material 34 is formed around the outside of heater 28 and the furnace and refractory is contained in a steel shell 36.
  • the vertical height of the columnar furnace 10 is a function of the operating temperature of the molten iron. Table I below shows the relationship between the vapor pressure of the magnesium and the height of a column of iron required to produce an equivalent pressure head at various temperatures:
  • the principal purpose of the columnar furnace is to provide the requisite pressure head and that, at the end of any heat, the iron contained in the furnace cannot be treated. Therefore, to minimize the amount of untreated metal, the inside diameter of the furnace core 26 should be kept at a minimum consistent with the desired flow rate of iron through the apparatus and the ability of the apparatus to maintain consistent temperatures.
  • the tundish-like vessel 12 at the upper end of the columnar furnace 10 comprises a refractory shell 38, preferably made from graphite, a heater 40 formed around, but electrically insulated from, the shell 38, appropriate refractory material 42 formed around the tundish shell 38 and heater 40, and an outer steel shell 42.
  • the tundish 12 may be formed integrally with the columnar furnace 10, as shown, or may be a separate unit in juxtaposition with the furnace 10.
  • the tundish 12 is designed so that its diameter is relatively large compared with its height whereby the operating head of molten metal may be maintained substantially constant.
  • the lower end of the furnace 10 communicates with the reactor. It will be appreciated that the furnace may communicate with the reactor alternatively at any point above its lower end provided that the effective height of the furnace is sufficient to provide the requisite static head at the level of the reactor.
  • the lower end of the columnar furnace 10 may be connected to the reactor 16 as shown most clearly in Figs. 2 and 3.
  • the reactor may comprise a refractory cylinder 46, preferably formed from graphite.
  • the refractory cylinder 46 comprises an assembly of threadedly joined cup-like portions 48, 50.
  • a threaded graphite sleeve 52 is assembled into a threaded hole formed in graphite cup 48 while a graphite coupling 54 joins the lower end of the furnace core 26 and the graphite sleeve 52.
  • a guide block 56 also preferably fabricated from graphite.
  • the guide block 56 has formed therein a generally J-shaped passage 58, the longer leg of which is aligned with the bore of the sleeve 52 while a shorter leg terminates in an orifice situated near the axis of the graphite cup 48.
  • the guide block 56 is formed so that its upper and lower edges mate with a portion of the inner surface of the refractory cylinder 46 while its lateral surfaces are displaced from the inner surface of the refractory cylinder 46. It will thus be appreciated that molten metal flowing through the columnar furnace passes through the J-shaped passage 58 of the guide block 56 and then passes around the guide block toward the rear of the reactor.
  • the plug 60 is provided as a convenience to fill the hole formed in the rear wall of the guide block 56 during boring of the bottom leg of the i-shaped passage 58.
  • a threaded orifice 62 is provided in the top region of the cup-like portion 50 of the reactor body opposite the columnar furnace 10 into which is threaded a freeze tube 64.
  • the freeze tube 64 communicates with the interior of the reactor and provides an escape passage for air initially contained within the reactor. It will be appreciated that the molten metal entering the reactor will first drive out the air contained in the reactor and then will itself enter the freeze tube. Due to the small bore of the freeze tube, the molten metal will solidify rapidly and thereby seal the freeze tube and the reactor 16.
  • the pressure within the reactor will approach a pressure determined by the head of molten metal in the columnar furnace 10.
  • the latter is preferably encased within a ceramic tube 66 around which a heating element 68 is wound.
  • the magnesium adder 18 communicates with the reactor 16 through an inclined threaded orifice 70 (Fig. 3).
  • the magnesium adder comprises a cylindrical body 72 made from a refractory material, preferably graphite,
  • the adder body 72 is preferably formed from two cup-like portions threadedly connected together.
  • a threaded sleeve 74 positions the adder body 72 in the threaded orifice 70 of the reactor 16.
  • a ceramic tube 76 bearing a heating element 78 surrounds the adder body 72.
  • a nipple 80 is threaded into the adder body 72 and carries a spring loading mechanism 82 on its free end (Fig. 6).
  • a valve stem 84 is positioned for axial movement along the axis of adder 18 and carries on the end adjacent to the reactor a needle valve 86 which seats in valve seat 88 threadedly connected to the sleeve 74. At the opposite end of the valve stem 84 there is mounted a stop 90 (see Fig. 6). A spring 92 surrounds the valve stem 84 and biases the needle valve 86 into the closed position.
  • the valve stem 84 may be integral or, as shown in Fig. 5, it may be fabricated from a series of rods and couplings. Where the stem 84 is of substantially smaller diameter than the bore of the sleeve 74, it may be desirable to provide a graphite sleeve 94 to provide a more uniform passageway. If desired, the sleeve 94 may be made from aluminum in order to provide pretreatment and degasification of the reactor 16.
  • a tube 96 communicating with a source of inert pressurized gas is connected to the nipple 80 so as to pressurize the adder body.
  • An 0-ring seal 98 seals the valve stem 84 from the spring loading mechanism 82 and prevents escape of the pressurizing fluid therebetween.
  • the heating element 78 provides sufficient heat to melt the magnesium bars 100 contained in the adder body 72 to form liquid magnesium which may then be forced into the reactor by pressurized inert gas through tube 96 whenever the needle valve 86 is opened.
  • magnesium adder 18 While a single magnesium adder 18 has been illustrated in the drawings and described above, it will be appreciated that a second magnesium adder of similar design may be located in juxtaposition with the first adder to provide additional liquid magnesium when the charge in the first adder has been exhausted. By alternately recharging the magnesium adders, the operation of the apparatus may be rendered continuous.
  • FIG. 9 An alternative apparatus for introducing magnesium into the reactor is shown schematically in Fig. 9 wherein portions common to the reactor shown in Fig. 3 bear the same identification numbers while similar parts are indicated by a primed identification number.
  • the body of the reactor 48" is formed with an angularly disposed orifice 156 sized to receive a solid magnesium wire 158 while maintaining the pressure within the interior region of the reactor 16.
  • the outer end of the orifice 156 may be flared as shown at 160,
  • the magnesium wire 158 may be supplied from appt-opri- ate reel or spool means (not shown) and fed into-the reactor 16 at a controlled rate by means of one or more sets of pinch rolls 162.
  • the magnesium wire 158 will be delivered to the region of the outlet of the J-shaped passage 58 formed in the guide block 56. As a result of the relatively high temperatures within the reactor, the magnesium wire will quickly melt and become dissolved or dispersed within the iron melt to form a mixture of iron and magnesium.
  • the columnar furnace 10, reactor 16 and adder 18 may be mounted on an appropriate frame 102.
  • a collar 104 having a flange on its free end is fastened to the frame 102 and carries a tap 106 for directing an inert pressurizing gas into the collar.
  • a flanged pipe 108 To the flange of the collar 104 is connected a flanged pipe 108, the opposite end of which is closed and sealed.
  • the pipe 108 is inclined with the flanged end higher than the closed end.
  • a refractory tube 110 preferably formed from graphite and having one end closed is disposed within the flanged pipe 108.
  • a spout 112 communicates between the reactor 16 and pressurized mold 20 through the collar 104.
  • molten iron is tapped from a ladle or other source of molten iron 14 into the tundish 12 and thence into the columnar furnace 10.
  • the molten metal passes through the J-shaped passage 58 of the guide block 56 and fills the reactor 16.
  • a pressure measured by the level of the molten metal in the tundish 12 is established.
  • the heater 78 of the adder 18 Prior to charging the columnar furnace with molten metal, the heater 78 of the adder 18 will have been activated so as to melt the magnesium bars contained therein into liquid form.
  • the valve stem 84 is activated under manual control or automatically by means of a solenoid responding to the pressure in the reactor chamber, so as to meter liquid magnesium at a predetermined rate into the stream of molten iron emerging from the short leg of the J-shaped passage 58 of the guide block 56, It will be appreciated that introducing the liquid magnesium into the iron at a point above the bottom of the J-shaped passage inhibits any tendency of the magnesium to flow into the columnar furnace where, as a result of decreasing pressure, boiling would occur.
  • the reactor 16 is sized to provide sufficient retention time for the iron to become substantially saturated with magnesium. Any excess magnesium will be dispersed throughout the iron bath.
  • the amount of magnesium that can be dissolved in iron varies with the temperature and composition of the metal; see "A New Method for Determination of Liquid - Liquid Equilibrium as Applied to the Fe-C-Si-Mg System" by P.K. Trojan and R.A. Flinn, Transactions of the ASM Vol. 54, 1961, pp. 549-566.
  • the same composition can dissolve about 1.4% magnesium, the balance of the magnesium being rejected as liquid magnesium, probably in the form of fine spherical droplets dispersed throughout the iron bath.
  • the tundish of the columnar furnace was 9 inches high and 4-3/4 inches inside diameter while the columnar furnace had an inside diameter of 3/4 inch and a total height of about 13 feet.
  • the reactor was formed from a graphite tube having an inside diameter of 2-1/2 inches and an outside diameter of 4 inches.
  • the inside length of the reactor was 15 inches.
  • a freeze tube having an inside diameter of 1/8 inch and a height of 9 inches was mounted near the exit end of the reactor which was provided with a tapping port 1/4 inch in diameter.
  • the magnesium adder was also formed from a graphite tube having an inside diameter of 2-1/2 inches and an inside length of about 10 inches.
  • the adder was arranged at an angle of 30° upwardly from the horizontal axis of the reactor.
  • Two magnesium sticks each 0.9 inch in diameter and about 10 inches long were charged into the adder.
  • An aluminum tube 2-1/2 inches long, 1 inch outside diameter and 9/16 inch inside diameter was placed in the adder nozzle ahead of the magnesium sticks, The diameter of the orifice of the adder nozzle was 3/64 inch.
  • the pressure chill mold 20 for this heat comprised a six inch diameter steel pipe 9 feet long which contained a graphite liner 9 feet long having an inside diameter of 4 inches and an outside diameter of 5-1/4 inches.
  • the pipe and graphite liner were inclined downwardly from the horizontal axis of the reactor at an angle of about 6°.
  • the columnar furnace Prior to the beginning of the heat, the columnar furnace was preheated to a temperature ranging over its height from 2000 to 2040°F. The reactor was also heated to a temperature in the range of 2000 to 2040°F and soaked for 1/2 hour. The magnesium adder was preheated to 1590°F while the tundish was preheated to 1680°F.
  • a log of the heat indicates the following:
  • a fine dispersion of magnesium in iron is equivalent for the purposes of the present invention with a solution of magnesium in iron but an agglomeration of the magnesium into large particles is disadvantageous.
  • the reason for this is that magnesium is relatively less dense than iron and therefore particles or drops of magnesium will tend to rise upwardly in a bath whose principal ingredient is iron and will soon vaporize to form bubbles of gaseous magnesium. The bubbles of gaseous magnesium will rise rapidly through the bath to join the atmosphere above the bath.
  • a "large" particle of magnesium is defined as one which will vaporize at least in substantial part instead of dissolving in the iron-containing bath under the pressure and temperature conditions present in the bath.
  • a "small" particle of magnesium may be defined correlatively as one which will dissolve in the liquid iron bath without substantial vaporization.
  • a proper control of the pressure and temperature conditions during cooling will result in an iron composition containing maximized amounts of finely dispersed magnesium in an iron matrix.
  • the matrix will contain a small amount of dissolved magnesium, e.g., less than about 0.1% magnesium.
  • Fig. 1 there is shown a pressurized chill mold apparatus which is designed to maintain a pressurized inert atmosphere within the mold while the cast bar is cooled rapidly,
  • Spout 112 communicates between the reactor 16 and the shotting ; chamber 22 and is preferably surrounded by an insulated sleeve 114 fastened at one end to the reactor frame 102 and at the other end to the tank 116 of the shotting chamber 22.
  • the tank 116 is sealed at the top by a lid 118 through which pass pressurizing tube 120 and liquid return tube 122.
  • Pressurizing tube 120 may be connected to a pump 124 and thence via conduit 126 to a source of inert gas (not shown).
  • the inert gas may be argon or another gas considered to be inert to both iron and magnesium which can be supplied in the usual high pressure cylinder fitted with an appropriate pressure regulator.
  • the bottom 128 of the tank 116 is preferably conical in shape and has an outlet 130 closed by a rotary valve 132.
  • a liquid quenching medium 134 e.g., oil, partially fills the tank 116.
  • Molten metal substantially saturated with magnesium in the reactor is sprayed through the spout 112 into the shotting chamber 22.
  • the molten metal tends to form droplets of generally spherical configuration which are then solidified into shot or pellets 136 as they pass through the liquid quenching medium 134.
  • Periodically a portion of the pellets 136 and liquid quenching medium 134 are withdrawn through the outlet 130 and valve 132.
  • the pellets and liquid may be separated and the liquid quenching medium returned to the tank 116 via conduit 138, pump 140 and tube 122.
  • the liquid quenching medium may pass through a heat exchanger (not shown) or filter (not shown) so as to maintain conditions of constant temperature and quenching medium quality within the shotting chamber 22.
  • the shotting chamber 22 is pressurized in order to inhibit the vaporization of the magnesium droplets present in the ferro-magnesium melt, it becomes possible, alternatively, to introduce magnesium into the stream of liquid metal within the shotting chamber as a supplement to the magnesium introduced in the reactor or, in some instances, in place of the magnesium introduced in the reactor.
  • the efficiency and uniformity of the magnesium addition may be lower under these circumstances since there is less time available for complete dissolution and mixing of the magnesium with the iron of the bath.
  • the shotting process can be performed continuously even though the pellets 136 and excess quenching medium are witherawn periodically. Also, it is unnecessary that the pellets be of any particular size or precise configuration. Nevertheless, by appropriate design of the outlet of the spout 112, the droplets of molten metal formed thereby will tend to be uniform in size and this will, in turn, promote uniformity in the size of the ultimate pellets. Of greater import is the fact that composition of the pellets will be substantially uniform as a result of the continuous operation of the reactor.
  • shotting is accomplished by directing a stream of molten ferro-magnesium into a pressurized chamber containing a quenching medium. It will be appreciated that other shotting techniques may also be employed. For example, a jet of inert gas may be directed into a stream of liquid ferro-magnesium, preferably from below the stream, to atomize the stream into droplets whereby fine pellets are formed. Another modification is the use of a mechanical device such as a paddle or impeller to mechanically break up the stream of liquid ferro-magnesium and direct the droplets into a quenching medium:
  • the process of the present invention may be used to produce nodular iron directly. Since the amount of retained magnesium required to produce nodular iron (e.g., 0.05%) is less than the solubility level of magnesium in iron (i.e., about 0.10%) the ferro-magnesium product as direct nodular iron may be withdrawn from the reactor and cast into ingots or end-products at ambient pressure. In this form of the invention, the efficiency in the use of the magnesium is high since little, if any, magnesium is lost as a vapor.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacture And Refinement Of Metals (AREA)
EP19790300491 1979-03-27 1979-03-27 Verfahren und Vorrichtung zur Herstellung metallischer Zusammensetzungen aus mindestens zwei Bestandteilen, wobei die Siedetemperatur eines Bestandteiles unter der Schmelztemperatur des anderen Bestandteiles liegt Expired EP0016273B1 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE7979300491T DE2966152D1 (en) 1979-03-27 1979-03-27 Process and apparatus for the production of metallic compositions comprising at least two constituents, one constituent having a melting temperature exceeding the boiling temperature of the other
EP19790300491 EP0016273B1 (de) 1979-03-27 1979-03-27 Verfahren und Vorrichtung zur Herstellung metallischer Zusammensetzungen aus mindestens zwei Bestandteilen, wobei die Siedetemperatur eines Bestandteiles unter der Schmelztemperatur des anderen Bestandteiles liegt

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19790300491 EP0016273B1 (de) 1979-03-27 1979-03-27 Verfahren und Vorrichtung zur Herstellung metallischer Zusammensetzungen aus mindestens zwei Bestandteilen, wobei die Siedetemperatur eines Bestandteiles unter der Schmelztemperatur des anderen Bestandteiles liegt

Publications (2)

Publication Number Publication Date
EP0016273A1 true EP0016273A1 (de) 1980-10-01
EP0016273B1 EP0016273B1 (de) 1983-09-14

Family

ID=8186353

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19790300491 Expired EP0016273B1 (de) 1979-03-27 1979-03-27 Verfahren und Vorrichtung zur Herstellung metallischer Zusammensetzungen aus mindestens zwei Bestandteilen, wobei die Siedetemperatur eines Bestandteiles unter der Schmelztemperatur des anderen Bestandteiles liegt

Country Status (2)

Country Link
EP (1) EP0016273B1 (de)
DE (1) DE2966152D1 (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0090654A2 (de) * 1982-03-29 1983-10-05 Elkem Metals Company Legierung und Verfahren zur Herstellung von duktilem Gusseisen mit Vernikulargraphit
EP0090653A2 (de) * 1982-03-29 1983-10-05 Elkem Metals Company Verfahren zur Herstellung und Giessen von duktilem Gusseisen mit Vernikulargraphit
FR2547597A1 (fr) * 1983-05-12 1984-12-21 Taniguchi Hirotoshi Procede et appareil pour le traitement continu de metal en fusion
AU596861B2 (en) * 1986-08-25 1990-05-17 Dow Chemical Company, The Injectable reagents for molten metals

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE309114C (de) *
US2754201A (en) * 1952-10-27 1956-07-10 Int Nickel Co Process of alloying magnesium with cast iron
GB765423A (en) * 1954-03-06 1957-01-09 Mond Nickel Co Ltd Improvements in methods of and apparatus for the treatment of molten iron and steel
US2797994A (en) * 1952-04-28 1957-07-02 Gutehoffnungshuette Oberhausen Method and apparatus for treatment of iron materials in a liquid state
GB831781A (en) * 1956-03-29 1960-03-30 Jiri Cervasek A process for the manufacture of ductile cast iron
US3311467A (en) * 1963-07-16 1967-03-28 Inst Liteinogo Proizv Akademii Method of metal modification under pressure and arrangement to carry out same
DE6924877U (de) * 1969-06-20 1970-01-29 Rupert Dipl Ing Moser Vorrichtung zur herstellung von gusseisen mit kugelgraphit

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE309114C (de) *
US2797994A (en) * 1952-04-28 1957-07-02 Gutehoffnungshuette Oberhausen Method and apparatus for treatment of iron materials in a liquid state
US2754201A (en) * 1952-10-27 1956-07-10 Int Nickel Co Process of alloying magnesium with cast iron
GB765423A (en) * 1954-03-06 1957-01-09 Mond Nickel Co Ltd Improvements in methods of and apparatus for the treatment of molten iron and steel
GB831781A (en) * 1956-03-29 1960-03-30 Jiri Cervasek A process for the manufacture of ductile cast iron
US3311467A (en) * 1963-07-16 1967-03-28 Inst Liteinogo Proizv Akademii Method of metal modification under pressure and arrangement to carry out same
DE6924877U (de) * 1969-06-20 1970-01-29 Rupert Dipl Ing Moser Vorrichtung zur herstellung von gusseisen mit kugelgraphit

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0090654A2 (de) * 1982-03-29 1983-10-05 Elkem Metals Company Legierung und Verfahren zur Herstellung von duktilem Gusseisen mit Vernikulargraphit
EP0090653A2 (de) * 1982-03-29 1983-10-05 Elkem Metals Company Verfahren zur Herstellung und Giessen von duktilem Gusseisen mit Vernikulargraphit
EP0090654A3 (en) * 1982-03-29 1984-03-07 Elkem Metals Company Alloy and process for producing ductile and compacted graphite cast irons
EP0090653A3 (en) * 1982-03-29 1984-03-21 Elkem Metals Company Processes for producing and casting ductile and compacted graphite cast irons
FR2547597A1 (fr) * 1983-05-12 1984-12-21 Taniguchi Hirotoshi Procede et appareil pour le traitement continu de metal en fusion
AU596861B2 (en) * 1986-08-25 1990-05-17 Dow Chemical Company, The Injectable reagents for molten metals

Also Published As

Publication number Publication date
DE2966152D1 (en) 1983-10-20
EP0016273B1 (de) 1983-09-14

Similar Documents

Publication Publication Date Title
US4147533A (en) Process for the production of ferro-magnesium and the like
US5310165A (en) Atomization of electroslag refined metal
US2837790A (en) Process for degassing ferrous metals
US3819365A (en) Process for the treatment of molten metals
US2803533A (en) Method of injecting fluidized powders for metallurgical treatment
WO2008038087A1 (en) Production of an inert blanket in a furnace
US3514285A (en) Method for feeding additive materials into a stream of molten metals
US2881068A (en) Method of treating a ferrous melt with a porous sintered metal body impregnated with a treating agent
US3671224A (en) Methods of producing leaded steel
EP0016273B1 (de) Verfahren und Vorrichtung zur Herstellung metallischer Zusammensetzungen aus mindestens zwei Bestandteilen, wobei die Siedetemperatur eines Bestandteiles unter der Schmelztemperatur des anderen Bestandteiles liegt
US4479530A (en) Method of manufacturing metallic wire products by direct casting of molten metal
US4666511A (en) Process for producing killed steel having a low nitrogen content
US4286646A (en) Method for inoculating or refining metal melts
US4652299A (en) Process for treating metals and alloys for the purpose of refining them
US4205981A (en) Method for ladle treatment of molten cast iron using sheathed magnesium wire
US5524704A (en) Process and device for the continuous casting of very small-diameter wires directly from liquid metal
US4459154A (en) Alloy and process for producing and casting ductile and compacted graphite cast irons
US4484731A (en) Method and apparatus for continuously treating molten metal
WO1980001924A1 (en) Process and apparatus for the production of metallic compositions
CA1111656A (en) Process and apparatus for the production of metallic compositions
JP4179180B2 (ja) 溶融金属の連続鋳造方法および連続鋳造装置
US3916979A (en) Method for obtaining spheroidal graphite castings
US4636249A (en) Treatment of molten metal
JPS6057486B2 (ja) 金属組成物の製造方法および装置
FI94775B (fi) Magnesiumkäsittelymenetelmä

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): BE CH DE FR GB LU

17P Request for examination filed

Effective date: 19810317

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

RBV Designated contracting states (corrected)

Designated state(s): BE CH DE FR GB LU

AK Designated contracting states

Designated state(s): BE CH DE FR GB LU

REF Corresponds to:

Ref document number: 2966152

Country of ref document: DE

Date of ref document: 19831020

ET Fr: translation filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 19840319

Year of fee payment: 6

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19840321

Year of fee payment: 6

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19840323

Year of fee payment: 6

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19840331

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: BE

Payment date: 19840331

Year of fee payment: 6

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: LU

Payment date: 19860404

Year of fee payment: 8

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CH

Effective date: 19880331

BERE Be: lapsed

Owner name: TROJAN PAUL KARL

Effective date: 19880331

Owner name: FLINN RICHARD ALOYSIUS

Effective date: 19880331

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19881118

GBPC Gb: european patent ceased through non-payment of renewal fee
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19881130

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19881201

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Effective date: 19890331