CN201244677Y

CN201244677Y - Novel tundish turbulent current controller

Info

Publication number: CN201244677Y
Application number: CNU2008201264986U
Authority: CN
Inventors: 付建勋
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-07-07
Filing date: 2008-07-07
Publication date: 2009-05-27
Anticipated expiration: 2018-07-07

Abstract

The utility model discloses a novel turbulence controller applied inside a continuous casting tundish for steelmaking. Under the assistance of hydrodynamical software, numerical simulation method is adopted to design the turbulence controller applied to the tundish with an inner cavity in a special shape, and optimal design is adopted. Partial bottom of the turbulence control cavity is a round plane, the diameter of the bottom plane is 1.1-2 times of the outer diameter of the long gate; the lateral face of the inner cavity is a paraboloid recessing inward, and the depth and height ratio of the paraboloid is 1:3 - 1:1.5; the controller can effectively prevent the impact of turbulence, reduce the kinetic energy of molten-steel turbulence, stabilize the liquid level and prolong the residence time. By software simulation test, the average speed that the molten-steel effuses from the turbulence controller is reduced by 5%-30%.

Description

A kind of novel tundish turbulence inhibitor

Technical field: the utility model relates to the equipment that a kind of Ferrous Metallurgy is used, and is the turbulence inhibitor that uses in a kind of steel-making continuous casting tundish specifically.

Background technology: the tundish of continuous casting is the impact that prevents molten steel under the ladle long nozzle high velocity stream, in the tundish of being everlasting turbulence inhibitor is set, and has control MOLTEN STEEL FLOW, opposing impact, reduces molten steel kinetic energy, and steadily liquid level reduces the dysgenic effect of turbulent flow.Traditional turbulence inhibitor is as a structural member, and its outer shape mostly is the cube or the cylinder of open top, middle cavities, and the shape of inner chamber mostly is cube shaped or cylindric, also fluted shape or groove shape.The utility model patent designs a kind of tundish turbulence inhibitor with special cavity shape, and carries out optimal design under the help of hydrodynamics software, makes it have the effect of good prevention and control turbulent flow.

Summary of the invention:

The purpose of the utility model design, exactly in order to overcome the not good problem of the ubiquitous flow control effect of traditional turbulence inhibitor, that is: molten steel is still too high through kinetic energy behind the turbulence inhibitor, causes impact zone big, the problem that liquid fluctuating is big.

This turbulence inhibitor, its outer shape and traditional turbulence inhibitor are similar, outer shape is cube or the cylinder that there is cavity at open top, middle part, outside size and thickness and tundish impact zone adapt, its unique design is: the inner chamber part bottom of control stream is disk, and the diameter of its baseplane is 1.1～2 times of long nozzle external diameter; Cavity side is the parabola of indent, and the scope of the ratio of its paraboloidal degree of depth and height is: 1:3～1:1.5;

The cavity shape of the utility model uniqueness can effectively play preventing the turbulent flow impact, reduces the molten steel Turbulent Kinetic, and it is moving steadily to tuck in ground roll, prolongs the effect of holdup time.Use hydrodynamics software FLUENT test, compare with the turbulence inhibitor of traditional inner chamber, the average speed that molten steel goes out turbulence inhibitor reduces by 5%～30%.。

Description of drawings: accompanying drawing 1 is the profile of parabolic inner chamber turbulence inhibitor; Wherein H represents the paraboloidal degree of depth; On behalf of paraboloidal height: D, B represent the diameter of baseplane.

Accompanying drawing 2 is that parabolic inner chamber turbulence inhibitor uses FLUENT software test, flow field and velocity profile;

The specific embodiment: followingly provide a specific embodiment:

The profile of turbulence inhibitor is 0.55 meter of a diameter, high 0.4 meter cylinder, and the upper and lower end face diameter of cylindrical cavity is 0.3 meter, dark 0.3 meter of inner chamber; The inner chamber side is the parabola of indent, and the ratio of its parabolical degree of depth and height is 1:2.5; The ratio of long nozzle external diameter and bottom surface radius is 1:1.15.

Claims

1, a kind of turbulence inhibitor, its outer shape and big or small thickness and traditional turbulence inhibitor are similar, profile is the cube or the cylinder of open top, middle cavities, outside size and thickness and tundish impact zone adapt, it is characterized in that: the inner chamber part bottom of control stream is disk, and the baseplane diameter is 1.1～2 times of long nozzle external diameter; The inner chamber side is the parabola of indent, and the ratio of the paraboloidal degree of depth and height is: 1:3～1:1.5.