US3632229A - Process for dosing of liquid metals, especially from melting or heat preserving containers by means of an electromagnetic conveying trough - Google Patents

Process for dosing of liquid metals, especially from melting or heat preserving containers by means of an electromagnetic conveying trough Download PDF

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Publication number
US3632229A
US3632229A US30057A US3632229DA US3632229A US 3632229 A US3632229 A US 3632229A US 30057 A US30057 A US 30057A US 3632229D A US3632229D A US 3632229DA US 3632229 A US3632229 A US 3632229A
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US
United States
Prior art keywords
stream
trough
thickness
field strength
substantial variations
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US30057A
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English (en)
Inventor
Axel Vonstarck
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.)
SMS Elotherm GmbH
Original Assignee
AEG Elotherm GmbH
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Filing date
Publication date
Application filed by AEG Elotherm GmbH filed Critical AEG Elotherm GmbH
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Publication of US3632229A publication Critical patent/US3632229A/en
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    • 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
    • B22D39/006—Electromagnetic conveyors

Definitions

  • the invention relates to a methodand apparatus for conveying molten metals.
  • Such conveyor troughs conventionally include a heatresistant nonmagnetic trough body below which is disposed the stator of a threephase linear motor for producing an electromagnetic travelling field which moves along the longitudinal direction of the trough.
  • This trough body can be mounted with a gradient, usually -30 percent, relative to the horizontal so that its lower end dips into a smelting or holding furnace from which the molten metal is conveyed and its upper end into a pouring nozzle from which the metal leaves the trough.
  • a gradient usually -30 percent
  • the invention of this application involves a method for metering molten metals whereby the molten metal to be conveyed is moved in an electromagnetic conveyor trough against the force of gravity in a metered open stream by means of an electromagnetic travelling field and whereby the extra cost required to produce a carefully regulated travelling field is avoided.
  • the method and apparatus of the invention is further characterized in that, for a given trough, the layer thickness of the flow of molten metal produced in the trough can be varied by simply varying the frequency of the current producing the travelling field so that a larger layer thickness results from a smaller frequency and vice versa.
  • the layer thickness of the metal flow produced in the trough can be varied by varying the gradient of the trough so that with a larger trough gradient a smaller layer thickness is obtained and vice versa.
  • vessel 1 of a holding or smelting furnace is shown schematically and in section.
  • an electromagnetic conveyor trough having its trough body 2 mounted at a gradient to the horizontal with its lower end terminating in vessel 1.
  • a schematically represented stator winding 3 of a threephase linear motor is mounted under trough body 2.
  • Stator winding 3 is supplied from a threephase current source 4 via the transformer 5, and, for connecting threephase current source 4 to transformer 5, suitable switching means 6 are provided on the primary side of transformer 5.
  • vessel l of the holding or smelting furnace is a quantity of molten metal 7 with its fluid level 8 extending onto the lower portion of trough body 2.
  • the threephase current flowing in winding 3 produces an electromagnetic travelling field moving in the direction of arrow 9, which in turn causes an open stream of molten metal in trough body 2 to flow along arrow 9 against gravity and eventually to flow out nozzle 10 into container 11.
  • the thickness of this flowing liquid layer increases, starting from the lower field strengths, initially with rising field strength.
  • boundary layer thickness obtainable in this manner at a conveyor trough gradient of l5-30 percent is in the range ol28, whereby 5 represents the penetration depth of the electromagnetic field into the molten metal. lf with a given 'conveyor trough it is desired to increase or reduce this given amplitude.
  • the layer thickness can also be varied by varying the gradient of the trough body 2. By reducing the gradient, the layer thickness boundary value is increased while increasing the trough gradient results in reducing the boundary value.
  • trough body 2 is connected to vessel 1 by hinge 12 for altering the gradient as desired.
  • a method of metering molten metals by means of an electromagnetic conveyor trough having means for producing a travelling electromagnetic wave for causing said meals to move up an inclined trough body against gravity in an open stream including the step of generating said wave with its field strength in a range such that substantial variations in said field strength do not cause substantial variations in the thickness of said stream.
  • step of generating includes the step of applying a sinusoidal signal to the stator winding of a linear motor mounted below said trough body and further including the step of varying the frequency of said signal to vary said thickness of said stream.
  • a method as in claim 1 including the step of varying the gradient of said inclined body to vary the thickness of said stream.
  • Apparatus for conveying molten metals comprising:
  • a trough body for guiding a stream of molten metal and inclined with respect to the horizontal
  • a linear motor having its stator winding mounted beneath said body and means for generating a sinusoidal electrical signal and for applying said signal to said motor to produce a travelling electromagnetic wave which causes molted metal to move against gravity in an open stream up said inclined body and which has its field strength in a range such that substantial variations in said field strength do not cause substantial variations in the thickness of said stream and including means for varying the frequency of said signal 5 as to vary the thickness of said stream.
  • Apparatus for conveying molten metals comprising: a trough body for guiding a stream of molten metal and inclined with respect to the horizontal,

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
  • Non-Mechanical Conveyors (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)
US30057A 1969-06-21 1970-04-20 Process for dosing of liquid metals, especially from melting or heat preserving containers by means of an electromagnetic conveying trough Expired - Lifetime US3632229A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19691931674 DE1931674B2 (de) 1969-06-21 1969-06-21 Verfahren zum betrieb einer elektromagnetischen foerder rinne

Publications (1)

Publication Number Publication Date
US3632229A true US3632229A (en) 1972-01-04

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ID=5737718

Family Applications (1)

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US30057A Expired - Lifetime US3632229A (en) 1969-06-21 1970-04-20 Process for dosing of liquid metals, especially from melting or heat preserving containers by means of an electromagnetic conveying trough

Country Status (5)

Country Link
US (1) US3632229A (es)
JP (1) JPS5013483B1 (es)
DE (1) DE1931674B2 (es)
FR (1) FR2047002A1 (es)
GB (1) GB1288868A (es)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3760245A (en) * 1971-11-12 1973-09-18 H Halvorsen Magnetic conveyer system
US3765797A (en) * 1971-04-10 1973-10-16 Aeg Elotherm Gmbh Improved electromagnetic conveyor trough
US4137156A (en) * 1975-03-21 1979-01-30 Occidental Petroleum Corporation Separation of non-magnetic conductive metals
US4491777A (en) * 1982-02-12 1985-01-01 Unico, Inc. Position control of fabricating materials
US9517900B2 (en) * 2014-01-29 2016-12-13 Korea Institute Of Ocean Science & Technology Dredged soils long distance transport system using magnetic field and tornado and its control method thereof

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50137178U (es) * 1974-04-25 1975-11-12
TWI676534B (zh) * 2017-03-29 2019-11-11 美商米沃奇電子工具公司 擊壓工具

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2573319A (en) * 1948-11-08 1951-10-30 Asea Ab Inductive stirring
US2836637A (en) * 1954-06-10 1958-05-27 Pechiney Prod Chimiques Sa Apparatus for removing liquid metal from furnaces
DE1286701B (de) * 1967-09-07 1969-01-09 Aeg Elotherm Gmbh Verfahren zum Dosieren von fluessigen Metallen aus Schmelz- oder Warmhaltegefaessen mit elektromagnetischer Foerderrinne
DE1291061B (de) * 1967-10-20 1969-03-20 Aeg Elotherm Gmbh Anordnung zum dosierten Vergiessen von fluessigen Metallen aus OEfen oder Giesspfannen mit elektromagnetischer Foerderrinne
US3554670A (en) * 1968-04-19 1971-01-12 Aeg Elotherm Gmbh Electromagnetic conveying trough for the transport of liquid metals

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2573319A (en) * 1948-11-08 1951-10-30 Asea Ab Inductive stirring
US2836637A (en) * 1954-06-10 1958-05-27 Pechiney Prod Chimiques Sa Apparatus for removing liquid metal from furnaces
DE1286701B (de) * 1967-09-07 1969-01-09 Aeg Elotherm Gmbh Verfahren zum Dosieren von fluessigen Metallen aus Schmelz- oder Warmhaltegefaessen mit elektromagnetischer Foerderrinne
DE1291061B (de) * 1967-10-20 1969-03-20 Aeg Elotherm Gmbh Anordnung zum dosierten Vergiessen von fluessigen Metallen aus OEfen oder Giesspfannen mit elektromagnetischer Foerderrinne
US3554670A (en) * 1968-04-19 1971-01-12 Aeg Elotherm Gmbh Electromagnetic conveying trough for the transport of liquid metals

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3765797A (en) * 1971-04-10 1973-10-16 Aeg Elotherm Gmbh Improved electromagnetic conveyor trough
US3760245A (en) * 1971-11-12 1973-09-18 H Halvorsen Magnetic conveyer system
US4137156A (en) * 1975-03-21 1979-01-30 Occidental Petroleum Corporation Separation of non-magnetic conductive metals
US4491777A (en) * 1982-02-12 1985-01-01 Unico, Inc. Position control of fabricating materials
US9517900B2 (en) * 2014-01-29 2016-12-13 Korea Institute Of Ocean Science & Technology Dredged soils long distance transport system using magnetic field and tornado and its control method thereof

Also Published As

Publication number Publication date
DE1931674B2 (de) 1971-04-15
DE1931674A1 (es) 1971-04-15
FR2047002A1 (es) 1971-03-12
JPS5013483B1 (es) 1975-05-20
GB1288868A (es) 1972-09-13

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