Plastic and nonmetallic article shaping or treating: processes – Outside of mold sintering or vitrifying of shaped inorganic... – Simultaneously burning – vaporizing – or melting of embedded...
Patent
1999-06-07
2000-12-26
Lin, Kuang Y.
Plastic and nonmetallic article shaping or treating: processes
Outside of mold sintering or vitrifying of shaped inorganic...
Simultaneously burning, vaporizing, or melting of embedded...
164437, 222606, B22D 1110
Patent
active
061654094
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The present invention concerns a transfer element for the transfer of molten steel between an upstream container such as a tundish and a downstream vessel such as a continuous casting mold, the said element having a body delimiting a steel entrance zone, a channel and a steel exit zone.
In the field of continuous casting, it is common practice to transfer the molten steel from an upstream container such as a tundish to a downstream vessel such as a continuous casting mold by means of transfer elements, e.g., a pouring spout or a tube, that protect the molten steel from the air and thus improve the quality of the metal cast.
In order to assure the best possible quality of the poured steel, several requirements should be met. The steel should arrive in the channel as slowly as possible. It should be uniformly distributed. It should cool in a homogeneous manner to assure a constant crystallization. The steel should not arrive close to the walls because it is through them that heat removal takes place (water cooling). The steel would thus be cooled too rapidly at the level of the walls and not enough in the center of the mold, which would result in a lack of homogeneity in cooling. Finally, it is necessary to avoid the formation of eddies that would entrain the cover powder, which would form inclusions in the steel.
SUMMARY OF THE INVENTION
The present invention proposes a transfer element that permits attaining these objectives.
According to the invention, the element has at least one divider in its exit zone for dividing the steel flow into at least two streams and this divider is comprised of two parts of complementary shape solid with the body, situated opposite each other and separated by an interstice.
The fact that the divider is comprised of two parts permits a free expansion of the walls of the body and avoids the appearance of cracks in the lower part of the element.
The exit zone can have quite diverse forms. For example, it can be circular. However, in order to bring the steel as much as possible to the center of the mold away from the walls, an elongated section would be preferred. The interstice is preferably vertical and located in a vertical plane parallel to the large dimension of the elongated section.
The interstice can be plane or have a sinuous form.
Another object of the present invention is a process for manufacturing an element for transferring molten steel from an upstream container such as a tundish to a downstream vessel such as a continuous casting mold, the said element being comprised of a body that delimits a steel entrance zone, a channel and a steel exit zone.
The process is characterized in that: wishes to have an interstice between the two parts of the divider; isostatically;
Other characteristics and advantages of the present invention will appear from reading the following description with reference to the attached figures.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a longitudinal sectional view along the section I--I of a spout according to the present invention.
FIG. 2 is a cross sectional view along the line II--II of the spout shown in FIG. 1.
FIG. 3 is a sectional view of the spout shown in FIGS. 1 and 2.
DETAILED DESCRIPTION OF THE INVENTION
The spout 2 shown in FIGS. 1-3 has an elongated body 4 of a refractory material.
This body delimits a pouring channel 6 for the passage of a molten metal, generally steel, from an upstream container to a downstream vessel. The upper part 8 of the body 4 is designed to be mounted on the thickness of the refractory wall covering the bottom wall of the upstream container, e.g., a tundish (not shown). A seat 10 is located in the upper part of the body 4; it is rounded and is designed to receive a stopper rod that makes it possible to interrupt and control the pouring of the molten steel. In the lower part 9 of the body 4 there is a divider 16 that delimits two separate exit orifices 17. The divider is comprised of two parts 19, each solid with the wall of the body 4, which is parallel with the lo
REFERENCES:
patent: 4776502 (1988-10-01), Hagenburger et al.
patent: 5188167 (1993-02-01), Perry et al.
patent: 5348075 (1994-09-01), Perry et al.
patent: 5402993 (1995-04-01), Hofman et al.
patent: 5716538 (1998-02-01), Poloni et al.
Dubois Pascal
Hanse Eric
Lin Kuang Y.
Vesuvius Crucible Company
Williams James R.
LandOfFree
Molten steel transfer element and its manufacturing does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Molten steel transfer element and its manufacturing, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Molten steel transfer element and its manufacturing will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-991360