Classifications

• • C—CHEMISTRY; METALLURGY
  • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
  • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
  • C22B21/00—Obtaining aluminium
  • C22B21/06—Obtaining aluminium refining
  • C22B21/066—Treatment of circulating aluminium, e.g. by filtration
• • C—CHEMISTRY; METALLURGY
  • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
  • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
  • C22B9/00—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals
  • C22B9/02—Refining by liquating, filtering, centrifuging, distilling, or supersonic wave action including acoustic waves
  • C22B9/026—Refining by liquating, filtering, centrifuging, distilling, or supersonic wave action including acoustic waves by acoustic waves, e.g. supersonic waves
• • 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
  • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
  • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
  • Y02P10/00—Technologies related to metal processing
  • Y02P10/20—Recycling

Definitions

• the present invention relates to a process for the degassing of a molten material and its implementation device.
• the invention relates to a process for degassing a molten material during which the molten material is subjected to ultrasonic emissions.
• the invention also relates to a device for implementing this process, comprising a device emitting ultrasound mounted integral with a transfer channel for the molten material connecting a furnace to a foundry.
• the main advantage of the process of the invention consists in that the degassing by ultrasound completely eliminates the impurities without causing secondary reactions and without giving off harmful fumes. Consequently, the process of the invention makes it possible to eliminate all the additional equipment which is normally necessary for the treatment of these side reactions. The cost of the installation is therefore greatly reduced and the equipment not bulky. Power consumption is also greatly reduced.
• Another important advantage of the process according to the invention lies in the fact that the emission of ultrasound on the molten material modifies the grain of the material and greatly reduces the residual inclusions, which facilitates casting. and filtering operations. This modification of the grain makes it possible to obtain a material which is more homogeneous and which has superior physical qualities.
• the degassing process according to the invention is useful, in particular, for degassing molten non-ferrous metals and molten aluminum or its derivatives.
• the device for implementing the method of the invention comprises ultrasonic heads which are mounted in the walls and the bottom of a transfer channel, which transfer channel is intended for the flow of molten material, for example molten aluminum, between a furnace and foundry equipment.
• the transfer channel can also be connected to a recirculation channel which returns the molten material to the furnace, in the event that the foundry is not in action.
• the ultrasonic heads can be connected to an adjustable ultrasonic generator, which makes it possible to vary the ultrasonic emissions according to need.
• FIG. 1 is a schematic side view of a carrying out the method
• Figure 2 is a schematic top view of the device of Figure 1
• FIG. 3 shows, in section, the ultra-sonic heads mounted in the transfer channel
• FIG. 4 shows a side view of the transfer channel equipped with the ultra-sonic heads.
• FIGs 1 and 2 schematically represent an installation for melting aluminum using the method of the invention.
• This installation comprises a transfer channel 2 which connects a furnace 1 to a foundry equipment 4.
• the molten material 3 flows in the transfer channel 2 from the furnace 1 to the foundry 4.
• the emission device ultrasound comprises a plurality of ultrasound heads 5 mounted in the walls 2' and the bottom 2'' of the transfer channel 21
• the ultrasound heads 5 are connected via connection cables 7 to a adjustable ultrasonic generator.
• Figure 2 also shows a recircu ⁇ tion channel 8 which allows the return of the molten material 3 into the furnace 1 when the foundry equipment 4 is not in use.
• the ultrasonic heads 5 are fixedly mounted in the side walls 2' and the bottom 2'' of the transfer channel 2.
• the principle of the invention is based on the emission of ultrasound acting on the molten material.
• the number of ultrasonic heads and the positioning of these heads in the vertical, longitudinal and transverse plane, in the walls of the transfer channel, are not decisive for the correct operation of the method.
• the number and positioning of the ultrasonic heads will be chosen according to the dimensions of the transfer channels and the casting parameters.

Landscapes

• Engineering & Computer Science (AREA)
• Chemical & Material Sciences (AREA)
• Manufacturing & Machinery (AREA)
• Materials Engineering (AREA)
• Mechanical Engineering (AREA)
• Metallurgy (AREA)
• Organic Chemistry (AREA)
• Physics & Mathematics (AREA)
• Acoustics & Sound (AREA)
• Manufacture And Refinement Of Metals (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=4223959

Family Applications (1)

Country Status (2)

Cited By (13)

Citations (6)

• 1986
  • 1986-05-13 WO PCT/CH1986/000062 patent/WO1986006749A1/fr unknown
  • 1986-05-13 EP EP86902781A patent/EP0224499A1/de not_active Withdrawn

Patent Citations (6)

Non-Patent Citations (4)

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