Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B22—CASTING; POWDER METALLURGY
  • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
  • B22D37/00—Controlling or regulating the pouring of molten metal from a casting melt-holding vessel
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B22—CASTING; POWDER METALLURGY
  • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
  • B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
  • B22D41/003—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like with impact pads
• • 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
• • 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
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B22—CASTING; POWDER METALLURGY
  • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
  • B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B22—CASTING; POWDER METALLURGY
  • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
  • B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
  • B22D41/50—Pouring-nozzles

Definitions

• the present invention relates to a method of molten metal casting utilizing an impact pad with spherical top in the tundish.
• Tundish is usually weldment of steel plates with reinforcing ribs and is provided with a refractory lining.
• the tundish nozzles are walled in the bottom of the tundish. The fact is that the tundish operations can affect the quality of the molten metal just before casting, so the development of tundish metallurgy is very important.
• the tundish meets various metallurgical functions as a reservoir of liquid molten metal before casting and it is the transporter of molten metal or steel for individual casting streams during changing the ladle, minimizes the casting flow splash, reduces ferrostatic pressure of the molten metal, homogenized molten metal chemically and thermally, separates the liquid metal from slag, evaluates the casting speed, monitor the temperature of the molten metal, it uniforms the speed in casting, maintains a steady constant flow of molten metal, maintains a constant liquid metal level in the crystallizer, therein the non-metallic inclusions are decanted, therein is possible to apply the most recent metallurgical operations like doping for example.
• the tundish there is adjusting the retention time, also dead volume etc. by the controlling of the flow. At present, there is the major objective of the use of tundish as a tool for minimizing transitional areas and dead volumes.
• Crash tundish pad contains basic desk with upper impact surface surrounded side wall with bordered tunnels.
• Crash tundish pad is created in such way that let shower on itself and deflect supply flow of molten metal and allow the effluxion deviated flow through canals and open upper pad surface.
• the arc stepped parts surrounding the canals and/or walls like weir help to control effluxion. Separation and distribution of effluxion facilitates the development of plug flow in the molten metal between the impact pad and the tundish outlet opening. Liquid metal flow is spreading after bottom of the tundish to the tundish nozzles indeed, in the upper corners of the tundish are created dead zones.
• a method of molten metal casting utilizing an impact pad in the tundish eliminates or significantly limits the disadvantages noted above.
• the nature of invention consists in that the molten metal is bringing into the tundish, at the bottom of which is located the impact pad with the spherical top, which captures the initial impact flow, the flow of molten metal is accelerated and optimized in terms of total volume.
• Tundish nozzles are opened after reaching the desired height of molten metal in the tundish, while the molten metal top is constant and the amount of flow in metal is equal to amount of metal which is leaved from the tundish through tundish nozzles to the next continuous casting equipment.
• a method of molten metal casting utilizing an impact pad is proposed either for the regime of molten metal casting with changed characteristics, hence when there is molten metal with another quality in next ladle as it was in the previous ladle and therefore the tundish must be the most empty as possible, because the steel created by the mixture of the first and next ladle is unsaleable.
• the casting speed varies when the ladle is changing etc. and therefore the innovative casting method extends the retention time at lower and higher casting speeds.
• the molten metal is bringing into the tundish at the bottom of which is located the impact pad with the spherical top, which captures the initial casting flow, eliminates the impact energies, the liquid metal is led away from the tundish in the total potential tundish volume through the upper tundish nozzles and submerged entry nozzles to the next continuous casting equipment.
• the advantage of said method of molten metal casting utilizing an impact pad is that there is eliminated the short circuit flow also at low casting speed, in the tundish there is avoiding the formation of dead zones, red eye effect on the surface of molten metal, the drag of tundish slag to the metal volume is not coming, in the practice there is signified by positive impact of the metal purity from a point of view of inclusions.
• An economic loss arising out of failure to sell steel of undetermined quality, arising from not emptied tundish is eliminated by the said method of casting.
• the molten metal is pouring into the tundish, at the bottom of which is located the impact pad with the spherical top, which captures the initial impact flow, prevents the molten metal splash, the flow of molten metal is accelerated and optimized in terms of total volume and eliminated the impact energies.
• Tundish nozzles are opened after reaching the desired height of molten metal in the tundish, while the molten metal top is constant and the amount of flow in metal is equal to amount of metal which is leaved from the tundish through tundish nozzles to the next continuous casting equipment.
• a method of molten metal casting utilizing an impact pad is proposed either for the regime of molten metal casting with changed characteristics, hence when there is molten metal with another quality in next ladle as it was in the previous ladle and therefore the tundish must be the most empty as possible, because the steel created by the mixture of the first and next ladle is unsaleable.
• the casting speed varies when the ladle is changing etc. and therefore the innovative casting method extends the retention time at lower and higher casting speeds.
• the molten metal is bringing into the tundish at the bottom of which is located the impact pad with the spherical top, which captures the initial casting flow, eliminates the impact energies, the liquid metal is led away from the tundish in the total potential tundish volume through the upper tundish nozzles and submerged entry nozzles to the next continuous casting equipment.
• the invention is industrial applicable in the field of metallurgy, particularly for the production of steel alloys, allowing big steel mills to meet the requirements of small amounts of alloy steel and economically efficient use of existing facilities,
• Patent Literature SK 288043

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Continuous Casting (AREA)
• Casting Support Devices, Ladles, And Melt Control Thereby (AREA)

Applications Claiming Priority (3)

Related Parent Applications (1)

Related Child Applications (1)

Publications (1)

Family

ID=61905197

Family Applications (2)

Family Applications After (1)

Country Status (7)

Family Cites Families (31)

• 2016
  • 2016-10-10 SK SK89-2016A patent/SK892016A3/sk not_active Application Discontinuation
  • 2016-10-17 RU RU2019111851A patent/RU2754217C2/ru active
  • 2016-10-17 JP JP2019540714A patent/JP2019535532A/ja active Pending
  • 2016-10-17 EP EP16918541.0A patent/EP3544755A4/en active Pending
  • 2016-10-17 CN CN201680090657.9A patent/CN110267753A/zh active Pending
  • 2016-10-17 US US16/340,962 patent/US20190283125A1/en not_active Abandoned
  • 2016-10-17 WO PCT/IB2016/056207 patent/WO2018069753A1/en not_active Ceased
• 2021
  • 2021-07-01 US US17/365,627 patent/US20210323055A1/en active Pending
  • 2021-07-14 JP JP2021116195A patent/JP7397499B2/ja active Active

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