US3463365A - Metal casting apparatus with electromagnetic nozzle - Google Patents

Metal casting apparatus with electromagnetic nozzle Download PDF

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US3463365A
US3463365A US3463365DA US3463365A US 3463365 A US3463365 A US 3463365A US 3463365D A US3463365D A US 3463365DA US 3463365 A US3463365 A US 3463365A
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Prior art keywords
nozzle
metal
flow passage
current
flow
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Jacques Dumont-Fillon
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Institut de Recherches de la Siderurgie Francaise IRSID
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N35/00—Automatic analysis not limited to methods or materials provided for in any single one of groups G01N1/00 - G01N33/00; Handling materials therefor
    • G01N35/10—Devices for transferring samples or any liquids to, in, or from, the analysis apparatus, e.g. suction devices, injection devices
    • G01N35/1095—Devices for transferring samples or any liquids to, in, or from, the analysis apparatus, e.g. suction devices, injection devices for supplying the samples to flow-through analysers
    • G01N35/1097—Devices for transferring samples or any liquids to, in, or from, the analysis apparatus, e.g. suction devices, injection devices for supplying the samples to flow-through analysers characterised by the valves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F33/00—Other mixers; Mixing plants; Combinations of mixers
    • B01F33/40—Mixers using gas or liquid agitation, e.g. with air supply tubes
    • B01F33/405—Mixers using gas or liquid agitation, e.g. with air supply tubes in receptacles having guiding conduits therein, e.g. for feeding the gas to the bottom of the receptacle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/16—Controlling or regulating processes or operations
    • B22D11/18—Controlling or regulating processes or operations for pouring
    • B22D11/181—Controlling or regulating processes or operations for pouring responsive to molten metal level or slag level
    • B22D11/186—Controlling or regulating processes or operations for pouring responsive to molten metal level or slag level by using electric, magnetic, sonic or ultrasonic means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D39/00—Equipment for supplying molten metal in rations
    • B22D39/003—Equipment for supplying molten metal in rations using electromagnetic field
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15C—FLUID-CIRCUIT ELEMENTS PREDOMINANTLY USED FOR COMPUTING OR CONTROL PURPOSES
    • F15C1/00—Circuit elements having no moving parts
    • F15C1/02—Details, e.g. special constructional devices for circuits with fluid elements, such as resistances, capacitive circuit elements; devices preventing reaction coupling in composite elements ; Switch boards; Programme devices
    • F15C1/04—Means for controlling fluid streams to fluid devices, e.g. by electric signals or other signals, no mixing taking place between the signal and the flow to be controlled
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15C—FLUID-CIRCUIT ELEMENTS PREDOMINANTLY USED FOR COMPUTING OR CONTROL PURPOSES
    • F15C1/00—Circuit elements having no moving parts
    • F15C1/20—Direct-impact devices i.e., devices in which two collinear opposing power streams are impacted
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00—Sampling; Preparing specimens for investigation
    • G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
    • G01N1/38—Diluting, dispersing or mixing samples
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
    • G01N15/10—Investigating individual particles
    • G01N15/12—Coulter-counters
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N35/00—Automatic analysis not limited to methods or materials provided for in any single one of groups G01N1/00 - G01N33/00; Handling materials therefor
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D7/00—Control of flow
    • G05D7/06—Control of flow characterised by the use of electric means
    • G05D7/0617—Control of flow characterised by the use of electric means specially adapted for fluid materials
    • G05D7/0629—Control of flow characterised by the use of electric means specially adapted for fluid materials characterised by the type of regulator means
    • G05D7/0635—Control of flow characterised by the use of electric means specially adapted for fluid materials characterised by the type of regulator means by action on throttling means
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/02—Induction heating
    • H05B6/34—Arrangements for circulation of melts
    • G01N15/134—
    • G01N2015/1019—
    • 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
    • Y10T137/00—Fluid handling
    • Y10T137/0318—Processes
    • 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
    • Y10T137/00—Fluid handling
    • Y10T137/206—Flow affected by fluid contact, energy field or coanda effect [e.g., pure fluid device or system]
    • Y10T137/2076—Utilizing diverse fluids
    • 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
    • Y10T137/00—Fluid handling
    • Y10T137/206—Flow affected by fluid contact, energy field or coanda effect [e.g., pure fluid device or system]
    • Y10T137/212—System comprising plural fluidic devices or stages
    • Y10T137/2125—Plural power inputs [e.g., parallel inputs]
    • Y10T137/2142—With variable or selectable source of control-input signal
    • 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
    • Y10T137/00—Fluid handling
    • Y10T137/206—Flow affected by fluid contact, energy field or coanda effect [e.g., pure fluid device or system]
    • Y10T137/2164—Plural power inputs to single device
    • Y10T137/2169—Intersecting at interaction region [e.g., comparator]
    • Y10T137/2174—Co-lineal, oppositely-directed power inputs [e.g., impact modulator]
    • 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
    • Y10T137/00—Fluid handling
    • Y10T137/4456—With liquid valves or liquid trap seals
    • Y10T137/4643—Liquid valves

Definitions

  • a metal casting apparatus having a downwardly extending nozzle formed with an axial flow passage therethrough which communicates at the upper end thereof with a container so that molten metal in the container may flow out of the same through the axial flow passage of the nozzle, and in which electromagnetic means cooperate with an electric current which is passed through the stream of metal flowing through the nozzle and/or electrically conductive passages formed therein to control the How of metal passing through the flow passage in dependence on the direction and magnitude of the electric current and the magnetic field produced by the electromagnetic means.
  • the present invention relates to a metal casting apparatus including a downwardly extending nozzle through which molten metal flows in a stream during the casting operation. More specifically, the present invention relates to such a nozzle in which a stream of molten metal flowing therethrough can be regulated.
  • Various arrangements for regulating the stream of molten metal through a nozzle are known in the art, and the known arrangement usually comprises movable valve members located in the path of the stream of molten metal so that by movement of the valve members the flow of metal through the nozzle may be regulated.
  • the metal casting apparatus mainly comprises a container adapted to contain a supply of molten metal, a downwardly extending nozzle of electrically non-conductive material formed with an axial flow passage therethrough and communicating with the bottom portion of the container for discharging a stream of molten metal therefrom.
  • the nozzle is further formed with at least one pair of elongated cavities respectively arranged to opposite sides of the axis of the flow passage and communicating at least at opposite ends with the latter, the cavities to opposite sides of the axis being axially displaced with respect to each other in such a manner so that a portion of each cavity which communicates with the flow passage is arranged in a common plane substantially normal to 3,463,365 Patented Aug.
  • the apparatus includes further current supply means connected to the molten metal for causing flow of electric current through the stream of molten metal and the electrically conductive material in the cavities so that the current will flow in the region of the aforementioned common plane along a path inclined at an angle to the axis of the flow passage, and electromagnetic means are arranged about the nozzle in the region of the aforementioned common plane for producing a magnetic field transverse to the axis of the flow passage and to the path of current in the region of the plane to produce thereby a force component retarding or accelerating the flow of metal through the flow passage depending on the direction and magnitude of the flow of the current and of the magnetic field.
  • the aforementioned cavities may be constituted by lateral channels
  • the lateral channels according to paragraph (a) may be filled with electrically conductive and refractory material
  • the electrically conductive and refractory material may be constituted by cermet, a product composed of ceramic material and a metal;
  • the flow passage through the nozzle and the aforementioned cavities may have a cylindrical form
  • the flow passage through the nozzle and the aforementioned cavities may have, in a plane normal to the axis of the nozzle, a rectangular cross section.
  • the invention comprises a metal casting apparatus in which a magnetic field created by an electromagnet acts on an electric current which passes through a stream of molten metal which flows out through a nozzle from a container of molten metal and in which the flow lines :of the electric current do not coincide with the direction of flow of the metal.
  • the passage through the nozzle through which current may flow is provided with a variation in its cross section formed by a pair of axially shifted cavities respectively loacted to opposite sides of the axis of the nozzle and arranged in such a manner so that a portion of each cavity which communicates with the ilow passage is arranged in a common plane substantially normal to the axis of the nozzle with a corresponding portion of the other cavity to form with the actual flow passage a maximum cross section.
  • This maximum cross section is sub jected to a magnetic field produced by the electromagnet, which magnetic field is transverse to the axis of the nozzle.
  • the lines of the electric current in passing through the aforementioned maximum cross section will be inclined to the axis of the nozzle and include with the flow of molten metal passing along the axis of the nozzle an angle differing from zero. Since, on the other hand, the magnetic field produced by the electromagnet will act on the portion of the flow passage in which the lines of electric current are inclined to the axis of the nozzle, the magnetic field will produce a force in direction normal to the lines of current according to the Law of Laplace, or according to Flemings Rules.
  • This force will have a component coinciding With the axis of the nozzle, which force component will be added or substracted to the ferrostatic pressure and all other pressures acting on the stream of molten metal, depending on the direction of current flow through the metal and the direction of the magnetic field.
  • the force thus produced permits therefore to regulate the outflow of the molten metal through the nozzle in a most precise manner by varying, respectively reversing the flow of electric current passing through the metal and/ or the magnetic field produced by the electromagnet.
  • the invention aims to simplify the electromagnetic arrangement using the action of a magnetic field on an electric current by arranging the contacts for the electric current with the stream of metal away from the narrow passage of the nozzle so as to avoid the difficulties which would result from arranging the contact electrodes in the narrow cross section of the nozzle.
  • FIG. 1 is a simplified schematic view of the apparatus according to the present invention
  • FIG. 2 is a longitudinal cross section through a first embodiment of a nozzle according to the present invention
  • FIG. 3 is a transverse cross-section taken along the line a-b of FIG. 2;
  • FIG. 4 is a longitudinal cross section through a second embodiment of a nozzle according to the present invention.
  • FIG. 5 is a transverse cross section taken along the line cd of FIG. 4;
  • FIG. 6 is a longitudinal cross section through a third embodiment of a nozzle according to the present invention.
  • FIG. 7 is a transverse cross section through the nozzle of FIG. 6 taken along the line e-f;
  • FIG. 8 is a longitudinal cross section through a fourth embodiment of a nozzle according to the present invention.
  • FIG. 9 is a transverse cross section taken along the line g-h of FIG. 8.
  • the apparatus according to the present invention mainly comprises a container 1 adapted to contain a supply of molten metal, for instance molten steel, and provided in the bottom wall thereof with a downwardly extending nozzle 2, only schematically shown in FIG. 1, through which a stream of molten metal may flow out from the container 1 into an ingot mold 5 of cast iron located beneath the nozzle 2.
  • a nozzle 2 is shown in FIG. 1 only schematically and various modifications of the nozzle according to the present invention are shown more clearly in FIGS. 2-9.
  • a portion of the nozzle 2 is subjected to the magnetic field produced by an electromagnet, the poles 3 and 4 of which are schematically shown in FIG. 1.
  • Electrical current is supplied to the electromagnet 3, 4 in a manner not shown in FIG. 1 and preferably in such a manner that the polarity of the poles 3 and 4 may be reversed, and the magnitude of the magnetic field produced by the electromagnet may be varied.
  • An electrode 7 held by means not shown in FIG. 1 is arranged to dip into the molten metal in the container 1 and the electrode 7 is connected to a source of current 6 and this source of current is likewise connected to the conductive wall of the ingot mold 5 so that electric current will flow through the stream of molten metal passing from the container 1 through the nozzle 2 into the ingot mold 5.
  • the current flowing through the stream of metal is a direct current which may have a magnitude from several thousand amperes and in this case the current flowing through the electromagnet is likewise a direct current.
  • the current flowing through the stream of metal may also be an alternating current, in which case the electromagnet has also to be supplied with alternating current of the same frequency and in such a manner that the electromagnetic field produced by the electromagnet is in phase with the vertical component of the current which creates a force permitting regulation of the outflow of the metal.
  • the container may contain not only molten steel, but also other metals, such as for instance lead, copper, mercury, etc.
  • another receptacle or a channel lined with refractory material may be used and in this case the source 6 of electric current is connected to another electrode dipping in the metal contained in the receptacle or the channel, or the second electrode may be arranged downstream of the outlet end of the nozzle to be in direct contact with the stream of metal emanating therefrom.
  • a current is preferably supplied to the stream of metal in such a manner that the direction of the current fiow may be reversed and that the magnitude of the current may be varied in a well-known manner, not shown in the drawmg.
  • FIGS. 2 and 3 illustrate a first embodiment of the nozzle according to the present invention.
  • the nozzle which is formed in all embodiments disclosed from electrically non-conductive material, is substantially cylindrical and formed with a central cylindrical flow passage Sf therethrough, and with two likewise substantially cylindtical cavities 9 and 10, respectively located to opposite sides of the axis 11 of the nozzle and in such a manner that the cavities 9 and 10 communicate over the whole length thereof with the fiow passage 8.
  • the cavities 9 and 10 are respectively axially displaced with respect to each other in such a manner that a lower portion of the cavity 9 is at the same elevation as an upper portion of the cavity 10 so that at these portions the flow passage has its maximum transverse cross section.
  • Two poles 3 and 4 of an electromagnet, formed from laminated soft iron, eX- tend into corresponding holes in the nozzle into close proximity of the flow passage 8 in the region of the aforementioned maximum cross section.
  • the poles are arranged in such a manner that the magnetic field indicated by the arrow B is located in a plane normal to the axis 11 of the nozzle.
  • the direction of the flow of metal through the nozzle is indicated by the arrows A and the lines of the current flowing through the metal are indicated in FIG. 2 by the dotted lines C.
  • the lines of current flow include in the region of the electromagnet an acute angle with the axis 11 of the nozzle and the electromagnetic field will therefore produce a force normal to the lines of current which will have a force component in direction of the axis of the nozzle and which will, depending on the direction of the current flow and the direction of the magnetic field, act in the same direction or in the opposite direction as the ferrostatic pressure so as to decrease or increase the speed at which the metal flows out through the nozzle.
  • FIGS. 4 and 5 illustrate a second embodiment of the nozzle according to the present invention.
  • the nozzle has in a plane normal to the axis 11 thereof a rectangular cross section and the central flow passage 12 as well as the lateral cavities 13 and 14 have likewise a rectangular cross section.
  • the advantage of this embodiment is to obtain due to the narrowness of the flow passage a correction pressure produced by the magnetic field which is greater than that ohtainable with the nozzle shown in FIGS. 2 and 3 at otherwise identical electrical conditions.
  • the cavities are constituted by lateral channels 15 and 16 which are separated from the central flow passage 17 by the walls 18 and 19 so that the channels communicate only at the upper and lower ends thereof with the flow passage.
  • the lower end of the lateral channel communicates with the central flow passage substantially in a common plane with the upper portion of the channel 16 which likewise communicates with the central flow passage.
  • the lines of current indicating by the dash lines C extend between the poles 3 and 4 of the electromagnet therefore in a direction normal to the flow of metal through the central flow passage, as indicated by the arrows A, and also normal to the magnetic field B so that under the same electrical condition the correction pressure due to the force produced by the magnetic field will reach its maximum, which is a special advantage of the modification illustrated in FIGS. 6 and 7.
  • the lateral channels 15 and 16 may also be filled with liquid metal in the same way as in the preceding embodiments, but the lateral channels may also be filled, as is i1- lustrated in FIG.
  • an electrically conductive refractory material such as Cermet, a product composed of a ceramic material and a metal, for instance Cr O' Cr; A1 0 Cr; or A1 0 Mo.
  • Cermet a product composed of a ceramic material and a metal, for instance Cr O' Cr; A1 0 Cr; or A1 0 Mo.
  • These cermets have a resistance of the same magnitude as or a lower resistance than the liquid steel and are therefore especially suitable for nozzles serving for the outflow of ferrous materials, and for non-ferrous metal other electrically conductive and refractory materials, for instance graphite, may be used.
  • FIGS. 8 and 9 illustrate a fourth embodiment of a nozzle according to the present invention in which three lateral cavities 20, 21 and 22 are provided, arranged with respect to each other as clearly shown in FIG. 8 in such a manner that the upper and lower ends of the cavity 21 arranged to one side of the axis 11 of the nozzle respectively overlap in axial direction the lower end of the cavity and the upper end of the cavity 22 arranged at the other side of the axis so as to form with the central flow passage maximum cross sections at the regions of the aforementioned overlaps and in which the portions of maximum cross section are subjected to the influence of a pair of electromagnets the poles of which are respectively designated with 23, 24 and 25, 26.
  • the arrangement according to the present invention may be used with continuous casting or discontinued casting of metal; it is particularly advantageous for the continuous casting of metal since it permits an extremely precise and fine regulation of the metal outflow from the nominal outflow caused by the ferrostatic pressure.
  • a metal casting apparatus comprising, in combination, a container adapted to contain a supply of molten metal; a downwardly extending nozzle of electrically nonconductive material formed with an axial flow passage therethrough communicating with a bottom portion of the container for discharging a stream of metal therefrom; at least one pair of elongated cavities formed in said nozzle and respectively arranged on opposite sides of the axis of said flow passage and communicating at least at opposite ends with said flow passage, said cavities to opposite sides of said axis being axially displaced with respect to each other in such a manner so that a portion of each cavity which communicates with said flow passage is arranged in a common plane substantially normal to said axis with a corresponding portion of the other cavity, said cavity being filled with electrically conductive material at least during flow of molten metal through said flow passage; current supply means connected to said molten metal for causing flow of electric current through said stream of molten metal and the electrically conductive material in said cavities, so that said current will flow in the region of said common plane along

Description

26, 1969 J. DUMbNT-FILLON 3,463,365
METAL CASTING APPARATUS WITH ELECTROMAGNETIC" NOZZLE 4 Sheets-Sheet 1 Filed July 18, 1967 FIG. I
W Mia 3 MM $1M,
J. DUMONT-FILLON METAL CASTING APPARATUS WITH ELECTROMAGNETIC NOZZLE Aug. 26, 1969 Filed July 18, 1967 4 WWW/# ce MA/u .m/J C 26, 1969 J. DUMONT-FILLON 3,463,355
METAL CASTING APPARATUS WITH ELECTROMAGNETICNOZZLE Filed July 18, 1967 4 Sheets-Sheet 4 20 w C M. 23(24) i me United States Patent Int. Cl. B65d 47/04; B 22d 11/10; F161 55/241 US. Cl. 222-544 v 8 Claims ABSTRACT OF THE DISCLOSURE A metal casting apparatus having a downwardly extending nozzle formed with an axial flow passage therethrough which communicates at the upper end thereof with a container so that molten metal in the container may flow out of the same through the axial flow passage of the nozzle, and in which electromagnetic means cooperate with an electric current which is passed through the stream of metal flowing through the nozzle and/or electrically conductive passages formed therein to control the How of metal passing through the flow passage in dependence on the direction and magnitude of the electric current and the magnetic field produced by the electromagnetic means.
Background of the invention The present invention relates to a metal casting apparatus including a downwardly extending nozzle through which molten metal flows in a stream during the casting operation. More specifically, the present invention relates to such a nozzle in which a stream of molten metal flowing therethrough can be regulated.
Various arrangements for regulating the stream of molten metal through a nozzle are known in the art, and the known arrangement usually comprises movable valve members located in the path of the stream of molten metal so that by movement of the valve members the flow of metal through the nozzle may be regulated.
It is an object of the present invention to provide for a nozzle arrangement which does not include any movable member for regulating the flow of molten metal therethrough.
It is an additional object of the present invention to provide for a nozzle arrangement in which control of flow of molten metal therethrough is produced by electromagnetic forces.
More specifically it is an object of the present invention to provide for a nozzle arrangement enabling to obtain a fine adjustment of the rate of flow of molten metal.
Summary of the invention With these objects in view, the metal casting apparatus according to the present invention mainly comprises a container adapted to contain a supply of molten metal, a downwardly extending nozzle of electrically non-conductive material formed with an axial flow passage therethrough and communicating with the bottom portion of the container for discharging a stream of molten metal therefrom. The nozzle is further formed with at least one pair of elongated cavities respectively arranged to opposite sides of the axis of the flow passage and communicating at least at opposite ends with the latter, the cavities to opposite sides of the axis being axially displaced with respect to each other in such a manner so that a portion of each cavity which communicates with the flow passage is arranged in a common plane substantially normal to 3,463,365 Patented Aug. 26, 1969 "ice the aforementioned axis with a corresponding portion of the other cavity, and the cavities are filled with electrically conductive material at least during flow of molten metal through the flow passage. The apparatus includes further current supply means connected to the molten metal for causing flow of electric current through the stream of molten metal and the electrically conductive material in the cavities so that the current will flow in the region of the aforementioned common plane along a path inclined at an angle to the axis of the flow passage, and electromagnetic means are arranged about the nozzle in the region of the aforementioned common plane for producing a magnetic field transverse to the axis of the flow passage and to the path of current in the region of the plane to produce thereby a force component retarding or accelerating the flow of metal through the flow passage depending on the direction and magnitude of the flow of the current and of the magnetic field.
The apparatus may also have the following characterestics in combination with those set forth above:
(a) The aforementioned cavities may be constituted by lateral channels;
(b) The lateral channels according to paragraph (a) may be filled with electrically conductive and refractory material;
(c) The electrically conductive and refractory material may be constituted by cermet, a product composed of ceramic material and a metal;
(d) The flow passage through the nozzle and the aforementioned cavities may have a cylindrical form; and
(e) The flow passage through the nozzle and the aforementioned cavities may have, in a plane normal to the axis of the nozzle, a rectangular cross section.
Basically, the invention comprises a metal casting apparatus in which a magnetic field created by an electromagnet acts on an electric current which passes through a stream of molten metal which flows out through a nozzle from a container of molten metal and in which the flow lines :of the electric current do not coincide with the direction of flow of the metal. For this purpose, the passage through the nozzle through which current may flow is provided with a variation in its cross section formed by a pair of axially shifted cavities respectively loacted to opposite sides of the axis of the nozzle and arranged in such a manner so that a portion of each cavity which communicates with the ilow passage is arranged in a common plane substantially normal to the axis of the nozzle with a corresponding portion of the other cavity to form with the actual flow passage a maximum cross section. This maximum cross section is sub jected to a magnetic field produced by the electromagnet, which magnetic field is transverse to the axis of the nozzle.
It will be understood that in such an arrangement the lines of the electric current in passing through the aforementioned maximum cross section will be inclined to the axis of the nozzle and include with the flow of molten metal passing along the axis of the nozzle an angle differing from zero. Since, on the other hand, the magnetic field produced by the electromagnet will act on the portion of the flow passage in which the lines of electric current are inclined to the axis of the nozzle, the magnetic field will produce a force in direction normal to the lines of current according to the Law of Laplace, or according to Flemings Rules. This force will have a component coinciding With the axis of the nozzle, which force component will be added or substracted to the ferrostatic pressure and all other pressures acting on the stream of molten metal, depending on the direction of current flow through the metal and the direction of the magnetic field. The force thus produced permits therefore to regulate the outflow of the molten metal through the nozzle in a most precise manner by varying, respectively reversing the flow of electric current passing through the metal and/ or the magnetic field produced by the electromagnet.
The invention aims to simplify the electromagnetic arrangement using the action of a magnetic field on an electric current by arranging the contacts for the electric current with the stream of metal away from the narrow passage of the nozzle so as to avoid the difficulties which would result from arranging the contact electrodes in the narrow cross section of the nozzle.
The novel features which are considered as characteristic for the invention are set forth in particular in the appended claims. The invention itself, however, both as to its construction and its method of operation, together with additional objects and advantages thereof, will be best understood from the following description of specific embodiments when read in connection with the accompanying drawing.
Brief description of the drawing FIG. 1 is a simplified schematic view of the apparatus according to the present invention;
FIG. 2 is a longitudinal cross section through a first embodiment of a nozzle according to the present invention;
FIG. 3 is a transverse cross-section taken along the line a-b of FIG. 2;
FIG. 4 is a longitudinal cross section through a second embodiment of a nozzle according to the present invention;
FIG. 5 is a transverse cross section taken along the line cd of FIG. 4;
FIG. 6 is a longitudinal cross section through a third embodiment of a nozzle according to the present invention;
FIG. 7 is a transverse cross section through the nozzle of FIG. 6 taken along the line e-f;
FIG. 8 is a longitudinal cross section through a fourth embodiment of a nozzle according to the present invention; and
FIG. 9 is a transverse cross section taken along the line g-h of FIG. 8.
Description of the preferred embodiments Referring now to the drawings, and more specifically to FIG. 1 of the same in which the overall arrangement of the casting apparatus according to the present invention is schematically illustrated, it will be seen that the apparatus according to the present invention mainly comprises a container 1 adapted to contain a supply of molten metal, for instance molten steel, and provided in the bottom wall thereof with a downwardly extending nozzle 2, only schematically shown in FIG. 1, through which a stream of molten metal may flow out from the container 1 into an ingot mold 5 of cast iron located beneath the nozzle 2. It is mentioned that the nozzle 2 is shown in FIG. 1 only schematically and various modifications of the nozzle according to the present invention are shown more clearly in FIGS. 2-9. A portion of the nozzle 2 is subjected to the magnetic field produced by an electromagnet, the poles 3 and 4 of which are schematically shown in FIG. 1. Electrical current is supplied to the electromagnet 3, 4 in a manner not shown in FIG. 1 and preferably in such a manner that the polarity of the poles 3 and 4 may be reversed, and the magnitude of the magnetic field produced by the electromagnet may be varied. An electrode 7 held by means not shown in FIG. 1 is arranged to dip into the molten metal in the container 1 and the electrode 7 is connected to a source of current 6 and this source of current is likewise connected to the conductive wall of the ingot mold 5 so that electric current will flow through the stream of molten metal passing from the container 1 through the nozzle 2 into the ingot mold 5.
In the arrangement illustrated, the current flowing through the stream of metal is a direct current which may have a magnitude from several thousand amperes and in this case the current flowing through the electromagnet is likewise a direct current. However, the current flowing through the stream of metal may also be an alternating current, in which case the electromagnet has also to be supplied with alternating current of the same frequency and in such a manner that the electromagnetic field produced by the electromagnet is in phase with the vertical component of the current which creates a force permitting regulation of the outflow of the metal.
It is to be understood that the container may contain not only molten steel, but also other metals, such as for instance lead, copper, mercury, etc. Instead of the ingot mold another receptacle or a channel lined with refractory material may be used and in this case the source 6 of electric current is connected to another electrode dipping in the metal contained in the receptacle or the channel, or the second electrode may be arranged downstream of the outlet end of the nozzle to be in direct contact with the stream of metal emanating therefrom. In any case, a current is preferably supplied to the stream of metal in such a manner that the direction of the current fiow may be reversed and that the magnitude of the current may be varied in a well-known manner, not shown in the drawmg.
FIGS. 2 and 3 illustrate a first embodiment of the nozzle according to the present invention. In this embodiment, the nozzle, which is formed in all embodiments disclosed from electrically non-conductive material, is substantially cylindrical and formed with a central cylindrical flow passage Sf therethrough, and with two likewise substantially cylindtical cavities 9 and 10, respectively located to opposite sides of the axis 11 of the nozzle and in such a manner that the cavities 9 and 10 communicate over the whole length thereof with the fiow passage 8. The cavities 9 and 10 are respectively axially displaced with respect to each other in such a manner that a lower portion of the cavity 9 is at the same elevation as an upper portion of the cavity 10 so that at these portions the flow passage has its maximum transverse cross section. Two poles 3 and 4 of an electromagnet, formed from laminated soft iron, eX- tend into corresponding holes in the nozzle into close proximity of the flow passage 8 in the region of the aforementioned maximum cross section. The poles are arranged in such a manner that the magnetic field indicated by the arrow B is located in a plane normal to the axis 11 of the nozzle. The direction of the flow of metal through the nozzle is indicated by the arrows A and the lines of the current flowing through the metal are indicated in FIG. 2 by the dotted lines C.
As clearly shown in FIG. 2, the lines of current flow include in the region of the electromagnet an acute angle with the axis 11 of the nozzle and the electromagnetic field will therefore produce a force normal to the lines of current which will have a force component in direction of the axis of the nozzle and which will, depending on the direction of the current flow and the direction of the magnetic field, act in the same direction or in the opposite direction as the ferrostatic pressure so as to decrease or increase the speed at which the metal flows out through the nozzle.
FIGS. 4 and 5 illustrate a second embodiment of the nozzle according to the present invention. In the modification shown in FIGS. 4 and 5 the nozzle has in a plane normal to the axis 11 thereof a rectangular cross section and the central flow passage 12 as well as the lateral cavities 13 and 14 have likewise a rectangular cross section. The advantage of this embodiment is to obtain due to the narrowness of the flow passage a correction pressure produced by the magnetic field which is greater than that ohtainable with the nozzle shown in FIGS. 2 and 3 at otherwise identical electrical conditions.
In the modification shown in FIGS. 6 and 7, the cavities are constituted by lateral channels 15 and 16 which are separated from the central flow passage 17 by the walls 18 and 19 so that the channels communicate only at the upper and lower ends thereof with the flow passage. As shown in FIG. 6, the lower end of the lateral channel communicates with the central flow passage substantially in a common plane with the upper portion of the channel 16 which likewise communicates with the central flow passage. In this modification, the lines of current indicating by the dash lines C extend between the poles 3 and 4 of the electromagnet therefore in a direction normal to the flow of metal through the central flow passage, as indicated by the arrows A, and also normal to the magnetic field B so that under the same electrical condition the correction pressure due to the force produced by the magnetic field will reach its maximum, which is a special advantage of the modification illustrated in FIGS. 6 and 7. The lateral channels 15 and 16 may also be filled with liquid metal in the same way as in the preceding embodiments, but the lateral channels may also be filled, as is i1- lustrated in FIG. 6, with an electrically conductive refractory material such as Cermet, a product composed of a ceramic material and a metal, for instance Cr O' Cr; A1 0 Cr; or A1 0 Mo. These cermets have a resistance of the same magnitude as or a lower resistance than the liquid steel and are therefore especially suitable for nozzles serving for the outflow of ferrous materials, and for non-ferrous metal other electrically conductive and refractory materials, for instance graphite, may be used.
Finally, FIGS. 8 and 9 illustrate a fourth embodiment of a nozzle according to the present invention in which three lateral cavities 20, 21 and 22 are provided, arranged with respect to each other as clearly shown in FIG. 8 in such a manner that the upper and lower ends of the cavity 21 arranged to one side of the axis 11 of the nozzle respectively overlap in axial direction the lower end of the cavity and the upper end of the cavity 22 arranged at the other side of the axis so as to form with the central flow passage maximum cross sections at the regions of the aforementioned overlaps and in which the portions of maximum cross section are subjected to the influence of a pair of electromagnets the poles of which are respectively designated with 23, 24 and 25, 26. The advantage of this modification is that the efiiciency of the nozzle is multiplied by two since the lines of current C present, as indicated by the dotted lines in FIG. 6, two curves of S- shaped configuration which at their point of inflection include a considerable angle with the metal flow direction indicated by the arrows A, while being substantially normal to the vector B of the magnetic field.
The arrangement according to the present invention may be used with continuous casting or discontinued casting of metal; it is particularly advantageous for the continuous casting of metal since it permits an extremely precise and fine regulation of the metal outflow from the nominal outflow caused by the ferrostatic pressure.
It will be understood that each of the elements described above, or two or more together, may also find a useful application in other types of metal casting apparatus differing from the types described above.
While the invention has been illustrated and described as embodied in a metal casting apparatus with an electromagnetically controlled nozzle, it is not intended to be limited to the details shown, since various modifications and structural changes may be made without departing in any way from the spirit of the present invention.
Without further analysis, the forgeoing will so fully reveal the gist of the present invention that others can by applying current knowledge readily adapt it for various applications without omitting features that, from the standpoint of prior art, fairly constitute essential characteristics of the generic or specific aspects of this invention and, therefore, such adaptations should and are intended to be comprehended within the meaning and range of equivalence of the following claims.
What is claimed as new and desired to be protected by Letters Patent is set forth in the appended claims.
I claim:
1. A metal casting apparatus comprising, in combination, a container adapted to contain a supply of molten metal; a downwardly extending nozzle of electrically nonconductive material formed with an axial flow passage therethrough communicating with a bottom portion of the container for discharging a stream of metal therefrom; at least one pair of elongated cavities formed in said nozzle and respectively arranged on opposite sides of the axis of said flow passage and communicating at least at opposite ends with said flow passage, said cavities to opposite sides of said axis being axially displaced with respect to each other in such a manner so that a portion of each cavity which communicates with said flow passage is arranged in a common plane substantially normal to said axis with a corresponding portion of the other cavity, said cavity being filled with electrically conductive material at least during flow of molten metal through said flow passage; current supply means connected to said molten metal for causing flow of electric current through said stream of molten metal and the electrically conductive material in said cavities, so that said current will flow in the region of said common plane along a path inclined at an angle to the axis of said flow passage; and electromagnetic means arranged about said nozzle in the region of said common plane for producing a magnetic field transverse to said axis of said flow passage and to said path of current in the region of said plane to produce thereby a force component retarding or accelerating the flow of metal through the flow passage depending on the direction and magnitude of the flow of the current and of the magnetic field.
2. A metal casting apparatus as defined in claim 1, wherein said cavities are open at the sides thereof facing said axis so as to communicate over the whole length thereof with said flow passage.
3. A metal casting apparatus as defined in claim 1, wherein said cavities and said flow passage have in a plane normal to said axis a substantially circular crosssection.
4. A metal casting apparatus as defined in claim 1, wherein said cavities and flow passage have in a plane normal to said axis a rectangular cross-section.
5. A metal casting apparatus as defined in claim 1, wherein said cavities are in the form of lateral channels communicating only at the upper and lower ends with said flow passage.
6. A metal casting apparatus as defined in claim 5, wherein said lateral channels respectively have in said common plane channel portions communicating with said flow passage and which are substantially normal to said axis of said flow passage.
7. A metal casting apparatus as defined in claim 5, wherein said lateral channels are filled with an electrically conductive refractory material.
8. A metal casting apparatus as defined in claim 7, wherein said electrically conductive and refractory material is constituted by a cermet.
References Cited UNITED STATES PATENTS 1,853,842 4/ 1932 Bates et 211. 2,743,492 5/1956 Easton 16428l X 3,349,838 10/1967 Baier l 64-281 HOUSTON S. BELL, IR., Primary Examiner US. Cl. X.R.
US3463365D 1963-12-12 1967-07-18 Metal casting apparatus with electromagnetic nozzle Expired - Lifetime US3463365A (en)

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US33003063A 1963-12-12 1963-12-12
FR70807A FR1496169A (en) 1963-12-12 1966-07-26 Electromagnetic nozzle
US63128467A 1967-04-17 1967-04-17
US80358869A 1969-03-03 1969-03-03
US19121571A 1971-10-21 1971-10-21

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US3520316D Expired - Lifetime US3520316A (en) 1963-12-12 1963-12-12 Pressure-to-pressure transducer
US3549994D Expired - Lifetime US3549994A (en) 1963-12-12 1967-04-17 Automatic method and apparatus for obtaining different dilutions from blood or the like samples and processing the same by fluid handling and electronics to obtain certain nonelectric parameters
US3463365D Expired - Lifetime US3463365A (en) 1963-12-12 1967-07-18 Metal casting apparatus with electromagnetic nozzle
US3614962D Expired - Lifetime US3614962A (en) 1963-12-12 1969-03-03 Impact modulator having cascaded control nozzles
US3777785D Expired - Lifetime US3777785A (en) 1963-12-12 1971-10-21 Fluid switch

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Cited By (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3701357A (en) * 1968-09-30 1972-10-31 Asea Ab Electromagnetic valve means for tapping molten metal
US3717122A (en) * 1971-03-01 1973-02-20 Xerox Corp Magnetic gate
US3777785A (en) * 1963-12-12 1973-12-11 Coulter Chem Inc Fluid switch
US3921671A (en) * 1973-12-19 1975-11-25 Asea Ab Electromagnetic valve for molten metal
US3970112A (en) * 1975-12-08 1976-07-20 General Motors Corporation Control valve
US3976117A (en) * 1974-11-01 1976-08-24 Erik Allan Olsson Method of and apparatus for converting molten metal into a semi-finished or finished product
DE2629045A1 (en) * 1975-07-04 1977-01-27 Anvar ELECTROMAGNETIC DEVICE FOR THE LIMITATION OF LIQUID METALS
US4229210A (en) * 1977-12-12 1980-10-21 Olin Corporation Method for the preparation of thixotropic slurries
US4324266A (en) * 1979-05-31 1982-04-13 Agence Nationale De Valorisation De Le Recherche (Anvar) Process and device for confining liquid metals by use of an electromagnetic field
US4419177A (en) * 1980-09-29 1983-12-06 Olin Corporation Process for electromagnetically casting or reforming strip materials
US4469165A (en) * 1982-06-07 1984-09-04 Olin Corporation Electromagnetic edge control of thin strip material
US4471832A (en) * 1980-12-04 1984-09-18 Olin Corporation Apparatus and process for electromagnetically forming a material into a desired thin strip shape
EP0157334A1 (en) * 1984-03-26 1985-10-09 KABUSHIKI KAISHA KOBE SEIKO SHO also known as Kobe Steel Ltd. Method and device for electromagnetically regulating pouring rate in continuous casting
US4606397A (en) * 1983-04-26 1986-08-19 Olin Corporation Apparatus and process for electro-magnetically forming a material into a desired thin strip shape
US4842170A (en) * 1987-07-06 1989-06-27 Westinghouse Electric Corp. Liquid metal electromagnetic flow control device incorporating a pumping action
US4953487A (en) * 1987-03-16 1990-09-04 Olin Corporation Electromagnetic solder tinning system
US4993477A (en) * 1989-03-06 1991-02-19 The United States Of America As Represented By The United States Department Of Energy Molten metal feed system controlled with a traveling magnetic field
US5261611A (en) * 1992-07-17 1993-11-16 Martin Marietta Energy Systems, Inc. Metal atomization spray nozzle
US5598200A (en) * 1995-01-26 1997-01-28 Gore; David W. Method and apparatus for producing a discrete droplet of high temperature liquid
US6044858A (en) * 1997-02-11 2000-04-04 Concept Engineering Group, Inc. Electromagnetic flow control valve for a liquid metal
WO2001012363A1 (en) * 1999-08-13 2001-02-22 Cambridge University Technical Services Limited Valve
US6321766B1 (en) 1997-02-11 2001-11-27 Richard D. Nathenson Electromagnetic flow control valve for a liquid metal with built-in flow measurement
US6799595B1 (en) * 2003-03-06 2004-10-05 The United States Of America As Represented By The Secretary Of The Navy Meltable and reclosable drain plug for molten salt reactor
US11044790B2 (en) * 2018-06-20 2021-06-22 Ultraflex International, Inc. System and method of melting and controlling the flow of molten metal by electromagnetic force utilizing multiple induction coils
US11376655B2 (en) * 2017-12-04 2022-07-05 Norsk Hydro Asa Casting apparatus and casting method
US11724326B1 (en) * 2022-03-03 2023-08-15 Shenzhen Anewbest Electronic Technology Co., Ltd. Method and device for liquid spray soldering and the application method thereof

Families Citing this family (69)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1598420A (en) * 1968-12-13 1970-07-06
CH513393A (en) * 1969-08-28 1971-09-30 Greiner Electronic Ag Process for performing chemical and / or physical analyzes in series
US3625238A (en) * 1970-01-26 1971-12-07 Johnson Service Co Two-dimensional fluidic logic device
US3626962A (en) * 1970-01-26 1971-12-14 Johnson Service Co Fluidic logic device
HU164637B (en) * 1970-02-02 1974-03-28
US3657725A (en) * 1970-04-28 1972-04-18 Gen Science Corp Particle counting system
US3896307A (en) * 1970-08-24 1975-07-22 Wheeler International Inc Method for automatic differential leukocyte count
DE2154066A1 (en) * 1970-10-29 1972-05-04 Clarke, Noel, Blackrock, Dublin Method and apparatus for measuring platelet clumping in healthy blood
US3731708A (en) * 1970-11-05 1973-05-08 Automatic Switch Co Fluidic device
US3743424A (en) * 1970-11-19 1973-07-03 Coulter Electronics Combined electronic and optical method and apparatus for analyzing liquid samples
US3864571A (en) * 1971-02-10 1975-02-04 Wheeler International Inc Method and Apparatus for Automatically, Identifying and Counting Various Cells in Body Fluids
DD98732A1 (en) * 1971-04-05 1973-07-12
US3742194A (en) * 1971-05-03 1973-06-26 Technican Instr Corp Method and apparatus for providing direct real-time determination of a particulate population
US3724476A (en) * 1971-05-10 1973-04-03 Eckardt Ag J Pneumatic amplifier
BE790042A (en) * 1971-10-14 1973-04-13 Coulter Electronics METHOD FOR CLASSIFYING PARTICLES
US3999047A (en) * 1972-09-05 1976-12-21 Green James E Method and apparatus utilizing color algebra for analyzing scene regions
US3851156A (en) * 1972-09-05 1974-11-26 Green James E Analysis method and apparatus utilizing color algebra and image processing techniques
US3976429A (en) * 1973-10-16 1976-08-24 Coulter Electronics, Inc. Backwash system for diluting apparatus
US3921066A (en) * 1974-02-25 1975-11-18 Angel Eng Corp Blood test device and method
US4041385A (en) * 1974-06-05 1977-08-09 Coulter Electronics, Inc. On-line sampling system for monitoring particles suspended in a fluid
US4052596A (en) * 1974-12-23 1977-10-04 Hycel, Inc. Automatic hematology analyzer
US3997838A (en) * 1975-04-14 1976-12-14 Technicon Instruments Corporation Apparatus and method for measurement of total volume of particles in a liquid sample
US4078211A (en) * 1976-09-29 1978-03-07 Coulter Electronics, Inc. Method and apparatus for balancing particle detecting signals generated in a particle study device having multiple apertures
IL53921A (en) * 1977-02-15 1979-12-30 Coulter Electronics Electronic particle sensing aperture module with perforated electrode
GB1603643A (en) * 1978-03-06 1981-11-25 Coulter Electronics Detection of blood disorders
GB2019995B (en) * 1978-04-10 1982-09-29 Kaartinen N Method and apparatus for handling batches of liquids
US4213876A (en) * 1978-08-22 1980-07-22 Coulter Electronics, Inc. Multi-purpose blood diluent for use in electronic blood analysis instrumentation
US4299726A (en) * 1979-05-07 1981-11-10 Coulter Electronics, Inc. Process for preparing whole blood reference controls having long term stability, preconditioning diluent and media therefor
US4244837A (en) * 1979-12-03 1981-01-13 Coulter Electronics, Inc. Multi-purpose blood diluent for use in electronic blood analysis instrumentation
US4278936A (en) * 1980-02-05 1981-07-14 Coulter Electronics, Inc. Biological cell parameter change test method and apparatus
US4395676A (en) * 1980-11-24 1983-07-26 Coulter Electronics, Inc. Focused aperture module
US4387076A (en) * 1981-10-14 1983-06-07 Coulter Electronics, Inc. Sample feeding arrangement
US4525666A (en) * 1982-05-03 1985-06-25 Coulter Electronics, Inc. Cell breakdown
JPS595933A (en) * 1982-07-02 1984-01-12 Hitachi Ltd Flow analysis of liquid sample
CH674580A5 (en) * 1983-10-06 1990-06-15 Contraves Ag
US4609017A (en) * 1983-10-13 1986-09-02 Coulter Electronics, Inc. Method and apparatus for transporting carriers of sealed sample tubes and mixing the samples
LU85858A1 (en) * 1985-04-19 1986-11-05 Electro Nite PROCESS FOR PREVENTING DEPOSITS ON THE WALLS OF METALLURGICAL CONTAINERS AND METALLURGICAL CONTAINER SUITABLE FOR IMPLEMENTING THIS PROCESS
US4726237A (en) * 1985-06-19 1988-02-23 Sequoia-Turner Corporation Fluid metering apparatus and method
US4640821A (en) * 1985-07-16 1987-02-03 Fisher Scientific Company Analysis apparatus
US4989978A (en) * 1986-04-04 1991-02-05 Technicon Instruments Corporation Method and apparatus for determining the count per unit volume of particles
US4858154A (en) * 1986-04-07 1989-08-15 Coulter Electronics, Inc. Interlaboratory quality assurance program
US4752690A (en) * 1986-08-11 1988-06-21 Coulter Electronics, Inc. Method and apparatus for detecting incongruities, such as air bubbles, in fluid material
DE3781677T2 (en) * 1986-10-17 1993-04-01 Baxter Int METHOD AND DEVICE FOR DETERMINING HAEMATOCRIT IN A SYSTEM FOR PROCESSING BLOOD COMPONENTS.
GB8711041D0 (en) * 1987-05-11 1987-06-17 Electricity Council Electromagnetic valve
SE8703987D0 (en) * 1987-10-14 1987-10-14 Sydkraft Ab METHOD AND PLANT FOR BIOGAS PRODUCTION
FR2629208B1 (en) * 1988-03-28 1991-05-31 Melet Francois AUTOMATIC HEMATOLOGICAL ANALYZER WITH SIMPLIFIED LYSIS LIQUID CIRCUIT
FR2629206B1 (en) * 1988-03-28 1991-01-04 Melet Francois SIMPLIFIED AUTOMATIC HEMATOLOGICAL ANALYZER
GB2218019B (en) * 1988-04-25 1992-01-08 Electricity Council Electromagnetic valve
ATE130679T1 (en) * 1988-07-07 1995-12-15 Francois Melet SIMPLIFIED LYSIS CIRCUIT FOR AN AUTOMATIC BLOOD ANALYZER.
US4957008A (en) * 1988-12-28 1990-09-18 Coulter Electronics, Inc. Fluid sampling and transfer valve assembly
US5036937A (en) * 1989-08-04 1991-08-06 Yamaha Hatsudoki Kabushiki Kaisha Exercise vehicle
DE4214539C1 (en) * 1992-04-27 1993-07-22 Mannesmann Ag, 4000 Duesseldorf, De
US6812032B1 (en) * 1993-01-21 2004-11-02 Cdc Technologies, Inc. Apparatus and method for making a plurality of reagent mixtures and analyzing particle distributions of the reagent mixtures
SE513881C2 (en) * 1994-01-10 2000-11-20 Boule Medical Ab Method and apparatus for analyzing liquid samples
GB9405028D0 (en) * 1994-03-15 1994-04-27 Counting Tech Ltd Fluid diluter
JP4136017B2 (en) * 1996-09-19 2008-08-20 シスメックス株式会社 Particle analyzer
US6063634A (en) * 1998-04-01 2000-05-16 Abbott Laboratories Fluid assembly and method for diagnostic instrument
USD404829S (en) * 1998-05-11 1999-01-26 Abbott Laboratories Housing for a reagent mixing apparatus for use with a diagnostic instrument
US6890489B2 (en) * 2000-04-26 2005-05-10 Rheodyne, L.P. Mass rate attenuator
WO2003104771A1 (en) * 2002-06-01 2003-12-18 Chempaq A/S Lysing reagent, cartridge and automatic electronic cell counter for simultaneous enumeration of different types of white blood cells
CA2855108A1 (en) * 2005-02-10 2006-08-17 Koninklijke Philips Electronics N.V. Dual sample cartridge and method for characterizing particles in liquid
WO2006084472A1 (en) 2005-02-10 2006-08-17 Chempaq A/S Dual sample cartridge and method for characterizing particle in liquid
US8557598B2 (en) * 2005-03-17 2013-10-15 Sysmex Corporation Method for measuring blood sample and apparatus thereof
US20070054404A1 (en) * 2005-09-08 2007-03-08 Beckman Coulter, Inc. Method of hemoglobin correction due to temperature variation
ITUD20060111A1 (en) * 2006-04-28 2007-10-29 Sire Analytical Syst Srl METHOD FOR DETECTION OF ANEMIA STATES PRESENT IN A EMATICAL SAMPLE
US9091677B2 (en) 2010-08-09 2015-07-28 Beckman Coulter, Inc. Isotonic buffered composition and method that enables counting of cells
CN102854052B (en) * 2012-08-08 2015-01-07 长春迪瑞医疗科技股份有限公司 Bubble blending method and control system thereof
FR3016678B1 (en) * 2014-01-22 2016-07-22 Air Liquide PRESSURIZED FLUID BOTTLE COMPRISING AN ELECTRONIC DATA INDICATION DEVICE
JP6609429B2 (en) * 2015-06-30 2019-11-20 日本光電工業株式会社 Blood analysis method and blood analyzer

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1853842A (en) * 1929-10-12 1932-04-12 Hartford Empire Co Apparatus for and method of feeding molten glass
US2743492A (en) * 1953-04-20 1956-05-01 Allegheny Ludlum Steel Apparatus for controlling the flow of molten metal
US3349838A (en) * 1965-06-04 1967-10-31 American Smelting Refining Float control valve for continuous casting

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US941235A (en) * 1908-07-14 1909-11-23 Harry A R Dietrich Expansion-tank with liquid-relief.
US1381095A (en) * 1920-03-27 1921-06-07 Fletcher C Starr Fuel-oil burner
US2889856A (en) * 1957-04-12 1959-06-09 Genevieve I Magnuson Apparatus for methods of filling measured amounts of viscous liquids or finely divided solids
GB913848A (en) * 1959-12-15 1962-12-28 Pneumo Hydraulic Automatic Con Fluid jet control devices
US3165692A (en) * 1961-05-15 1965-01-12 Technicon Instr Continuously operable apparatus and method for counting particles in successive portions of a flowing fluid stream
US3080886A (en) * 1961-09-18 1963-03-12 Honeywell Regulator Co Fluid amplifier
US3068880A (en) * 1961-12-28 1962-12-18 Gen Precision Inc Pneumatic diode
NL289079A (en) * 1962-02-16 1900-01-01
US3117593A (en) * 1962-04-23 1964-01-14 Sperry Rand Corp Multi-frequency fluid oscillator
US3128040A (en) * 1962-10-29 1964-04-07 Ibm Fluid logic device
FR1347425A (en) * 1963-01-31 1963-12-27 Siemens Ag pneumatic or hydraulic logic element
US3520316A (en) * 1963-12-12 1970-07-14 Bowles Eng Corp Pressure-to-pressure transducer
US3200457A (en) * 1964-03-09 1965-08-17 United States Steel Corp Method of regulating the discharge of molten metal from ladles
FR1450471A (en) * 1964-03-26 1966-06-24 Coultronics France Orifice tube for electronic particle analysis device
NL137000C (en) * 1964-03-26
US3340470A (en) * 1964-09-23 1967-09-05 Coulter Electronics Flow-through sample apparatus for use with electrical particle study device
FR1418347A (en) * 1964-10-30 1965-11-19 Johnson Service Co Device for controlling a motor fluid

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1853842A (en) * 1929-10-12 1932-04-12 Hartford Empire Co Apparatus for and method of feeding molten glass
US2743492A (en) * 1953-04-20 1956-05-01 Allegheny Ludlum Steel Apparatus for controlling the flow of molten metal
US3349838A (en) * 1965-06-04 1967-10-31 American Smelting Refining Float control valve for continuous casting

Cited By (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3777785A (en) * 1963-12-12 1973-12-11 Coulter Chem Inc Fluid switch
US3701357A (en) * 1968-09-30 1972-10-31 Asea Ab Electromagnetic valve means for tapping molten metal
US3717122A (en) * 1971-03-01 1973-02-20 Xerox Corp Magnetic gate
US3921671A (en) * 1973-12-19 1975-11-25 Asea Ab Electromagnetic valve for molten metal
US3976117A (en) * 1974-11-01 1976-08-24 Erik Allan Olsson Method of and apparatus for converting molten metal into a semi-finished or finished product
DE2629045A1 (en) * 1975-07-04 1977-01-27 Anvar ELECTROMAGNETIC DEVICE FOR THE LIMITATION OF LIQUID METALS
US4082207A (en) * 1975-07-04 1978-04-04 Agence Nationale De Valorisation De La Recherche (Anvar) Electromagnetic apparatus for construction of liquid metals
US3970112A (en) * 1975-12-08 1976-07-20 General Motors Corporation Control valve
US4229210A (en) * 1977-12-12 1980-10-21 Olin Corporation Method for the preparation of thixotropic slurries
US4324266A (en) * 1979-05-31 1982-04-13 Agence Nationale De Valorisation De Le Recherche (Anvar) Process and device for confining liquid metals by use of an electromagnetic field
US4419177A (en) * 1980-09-29 1983-12-06 Olin Corporation Process for electromagnetically casting or reforming strip materials
US4471832A (en) * 1980-12-04 1984-09-18 Olin Corporation Apparatus and process for electromagnetically forming a material into a desired thin strip shape
US4469165A (en) * 1982-06-07 1984-09-04 Olin Corporation Electromagnetic edge control of thin strip material
US4606397A (en) * 1983-04-26 1986-08-19 Olin Corporation Apparatus and process for electro-magnetically forming a material into a desired thin strip shape
EP0157334A1 (en) * 1984-03-26 1985-10-09 KABUSHIKI KAISHA KOBE SEIKO SHO also known as Kobe Steel Ltd. Method and device for electromagnetically regulating pouring rate in continuous casting
US4953487A (en) * 1987-03-16 1990-09-04 Olin Corporation Electromagnetic solder tinning system
US4842170A (en) * 1987-07-06 1989-06-27 Westinghouse Electric Corp. Liquid metal electromagnetic flow control device incorporating a pumping action
US4993477A (en) * 1989-03-06 1991-02-19 The United States Of America As Represented By The United States Department Of Energy Molten metal feed system controlled with a traveling magnetic field
US5261611A (en) * 1992-07-17 1993-11-16 Martin Marietta Energy Systems, Inc. Metal atomization spray nozzle
US5598200A (en) * 1995-01-26 1997-01-28 Gore; David W. Method and apparatus for producing a discrete droplet of high temperature liquid
US6044858A (en) * 1997-02-11 2000-04-04 Concept Engineering Group, Inc. Electromagnetic flow control valve for a liquid metal
US6321766B1 (en) 1997-02-11 2001-11-27 Richard D. Nathenson Electromagnetic flow control valve for a liquid metal with built-in flow measurement
WO2001012363A1 (en) * 1999-08-13 2001-02-22 Cambridge University Technical Services Limited Valve
US6799595B1 (en) * 2003-03-06 2004-10-05 The United States Of America As Represented By The Secretary Of The Navy Meltable and reclosable drain plug for molten salt reactor
US11376655B2 (en) * 2017-12-04 2022-07-05 Norsk Hydro Asa Casting apparatus and casting method
US11044790B2 (en) * 2018-06-20 2021-06-22 Ultraflex International, Inc. System and method of melting and controlling the flow of molten metal by electromagnetic force utilizing multiple induction coils
US11724326B1 (en) * 2022-03-03 2023-08-15 Shenzhen Anewbest Electronic Technology Co., Ltd. Method and device for liquid spray soldering and the application method thereof

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CA936018A (en) 1973-10-30
ZA727237B (en) 1974-05-29
CH494963A (en) 1970-08-15
LU54155A1 (en) 1967-09-21
DE1300208B (en) 1969-07-31
GB1305813A (en) 1973-02-07
NL7213663A (en) 1973-04-25
SE337706B (en) 1971-08-16
IL29836A0 (en) 1968-06-20
IL40531A (en) 1975-10-15
FR2157374A5 (en) 1973-06-01
SE309656B (en) 1969-03-31
IL38219A (en) 1973-02-28
US3777785A (en) 1973-12-11
GB1194584A (en) 1970-06-10
FR1496169A (en) 1967-09-29
IT966272B (en) 1974-02-11
DE1773226A1 (en) 1972-04-27
JPS542598B1 (en) 1979-02-09
DE1773226B2 (en) 1975-10-09
ES367189A1 (en) 1971-04-01
US3520316A (en) 1970-07-14
FR1571423A (en) 1969-06-20
FR2034613A1 (en) 1970-12-11
DE2009713B2 (en) 1975-01-16
JPS556192B1 (en) 1980-02-14
ES352852A1 (en) 1970-01-16
JPS49225B1 (en) 1974-01-07
GB1369557A (en) 1974-10-09
DE2009713C3 (en) 1975-08-28
ES367188A1 (en) 1972-01-01
IL29836A (en) 1972-02-29
US3614962A (en) 1971-10-26
JPS4846773A (en) 1973-07-03
DE2009713A1 (en) 1970-09-17
FR2034613B1 (en) 1974-08-09
IL40531A0 (en) 1972-12-29
AU4759672A (en) 1974-08-15
CA931508A (en) 1973-08-07
ES407499A1 (en) 1975-10-16
ES367190A1 (en) 1971-04-01
GB1232701A (en) 1971-05-19
US3549994A (en) 1970-12-22
CH563184A5 (en) 1975-06-30
BE713776A (en) 1968-10-17
NL6709747A (en) 1968-01-29
DE2249554A1 (en) 1973-04-26
BE701846A (en) 1968-01-02
NL6805384A (en) 1968-10-18

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