CLIAMS:1. A teeming ladle for carrying the liquid steel, said teeming ladle comprising: a brick wall lining with plurality of brick layer (s); wherein a first brick layer of said wall lining having top inclined structure of the brick(s), therefore improving the strength of lower part of said teeming ladle by dispersing the mechanical stress from said brick wall lining to the shell of said teeming ladle, thereby enhancing the lining life.
2. The teeming ladle as claimed in claim 1, wherein inclination in said first brick layer is according to a tapering angle of the shell of said teeming ladle.
3. The teeming ladle as claimed in claim 1, wherein a second brick layer of said wall lining is placed on top inclined surface of said first brick layer.
4. The teeming ladle as claimed in claim 3, wherein back face of said second brick layer contacting a backup safety lining of said teeming ladle which is arranged along the surface of the shell of said teeming ladle, therefore continued arranging the next layer(s) of said wall lining up to the top in said teeming ladle.
5. The teeming ladle as claimed in claim 1, wherein dimension of the inclined surfaced brick(s) is based on the lining pattern of said wall lining and dimensions of said teeming ladle.
6. The teeming ladle as claimed in claim 1, wherein inclination in said first brick layer of said wall lining is essentially in back side of the brick(s).
7. The teeming ladle as claimed in claim 1, wherein capacity of said teeming ladle is 130Ton. ,TagSPECI:TECHNICAL FIELD OF THE INVENTION
The present invention relates generally to steel teeming ladle. More particularly, the present invention provides an improved lining pattern of steel teeming ladle which is used to transfer liquid steel from converter to mould at teeming bay after passing through steel refining process.

BACKGROUND AND THE PRIOR ART
In steel making process, the refractory brick lining of steel ladle wall remains under mechanical and thermal stress during its operation. Due to frequent pouring into and emptying out 130 Ton liquid steel of temperature of about 1640-1680°C its impact over lining becomes significant. Mechanical stress develops throughout the lining of the ladle particularly at the lower part after getting initial impact of liquid steel. Central part of the bottom lining gets heated up and expands towards bottom periphery.
Due to limited scope for expansion of peripheral bricks near wall particularly the first working layer gets under tremendous stress. The pressure of liquid steel and top brick work of wall also gives an increasing stress over it.
Apart from this thermal shocks arises due to frequent change in temperature also create stresses. However thermal stress is more at the top portion of the ladle then lower part as the top part is open to the atmosphere. Stresses so developed create cracks over brick works, weakens the brick, aggravate dislodging of refractory grains from bricks and enhance erosion of refractory lining. Thus, lining life of steel ladle remains low. In figure.1 stress development in the lower part of the ladle lining is shown and explained.
There are two ways to reduce the stress for improving the lining life.
1. Change the quality of bricks to bear the adverse conditions of the ladle but that is beyond the scope of this patent proposal.
2. Change the design of first layer brick in wall lining in such a fashion that part of the mechanical stress could be dispersed from brick work to the shell of the ladle. This point is convenient to adopt as there is no cost implication in its implementation. This has been adopted with miracle response in positive direction.
Some prior art document related to improvement in the service life of the steel ladle, are given below:
CN201264088Y disclosed a utility model relates to a ladle lining brick structure in the steel-making technical field. The front surface and the rear surface of a ladle lining brick adopt parallelogram structures, the upper surface and the lower surface of the ladle lining brick and the plane form a certain angle Alpha of 0-30 degrees, and the sides of the ladle lining bricks adopt big end up trapezoid structures. The utility model ensures that the lining brick and the ladle wall have better contact for reducing the gap when in building position through the brick shape design of the ladle lining brick because the brick shape is fully considered to match with the inner shape of the ladle when being designed, thereby reducing the looseness probability and the looseness extent of the lining brick, effectively preventing accidents of brick falling, leaker, and the like from occurring, increasing the safety, lowering the maintenance cost of the ladle, prolonging the service life of the lining brick, and reducing the resource possession. In the above mentioned prior art provides ladle lining brick structure in which front surface and the rear surface of a ladle lining brick adopt parallelogram structures and provides prolong service life of the lining brick and reduce the resource possession. The above mentioned prior art document changes the ladle lining brick structure different from present invention.
CN102107276B disclosed a new slope brick from steel tank, characterized in that: said slope from the thick end of the brick and the bottom side of the angle <90 °, the thin client side and bottom angle of> 90 degrees. Using the above molten steel from the slope of the new brick wall jars from the slope process, in order from the slope brick masonry Q1, Q2 from the slope brick, Q3 from the slope brick, Q1 from the slope brick and the sheet on which the puzzle blocks added, Q2 from the slope brick and the sheet on which the puzzle blocks added, Q3 from the slope brick and the sheet on which the puzzle blocks plus a loop, the loop until it encounters masonry puzzle head. Forming a slope from the beginning of the repeated structure. The present invention makes spiral upward slope fully consistent masonry, which can completely eliminate excessive levels Zhuanfeng and superscalar triangular slit Zhuanfeng ensure the quality of masonry. The new steel tank up slope from the slope of brick and steel structure completely eliminate seepage, leakage steel accidents, effectively extending the service life of the masonry. In this prior art document a slope brick structure is provided in steel ladle which effectively extending the service life of the masonry.
In the above mentioned prior arts, none of them provides lining pattern of steel ladle with inclined structure of first layer bricks as of the present invention.
Therefore, to provide an improved service life of steel ladle and to overcome the problems existing conventionally, the present invention provides a modified refractory lining design at lower part of the lining for better performance of lining without addition to intrinsic value in the quality of bricks, and therefore reducing the stress to a great extent.

OBJECT OF THE INVENTION
A basic object of the present invention is to overcome the disadvantages/drawbacks of the known art.
Another object of the present invention is to provide a lining pattern of steel teeming ladle with inclined structure of first layer bricks.
Another object of the present invention is to provide a design of single brick for improving the lining life of steel teeming ladle.
Another object of the present invention is to provide a design of first layer bricks which improving the strength of lower part of steel ladle during carryover of the liquid steel.
Another object of the present invention is to provide a steel teeming ladle which reducing the stress on wall lining.
These and other advantages of the present invention will become readily apparent from the following detailed description read in conjunction with the accompanying drawings.

SUMMARY OF THE INVENTION
The following presents a simplified summary of the invention in order to provide a basic understanding of some aspects of the invention. This summary is not an extensive overview of the present invention. It is not intended to identify the key/critical elements of the invention or to delineate the scope of the invention. Its sole purpose is to present some concept of the invention in a simplified form as a prelude to a more detailed description of the invention presented later.
According to an aspect of the present invention, there is provided a teeming ladle for carrying the liquid steel, said teeming ladle comprising: a brick wall lining with plurality of brick layer (s); wherein a first brick layer of said wall lining having top inclined structure of the brick(s), therefore improving the strength of lower part of said teeming ladle by dispersing the mechanical stress from said brick wall lining to the shell of said teeming ladle, thereby enhancing the lining life.
Other aspects, advantages, and salient features of the invention will become apparent to those skilled in the art from the following detailed description, which, taken in conjunction with the annexed drawings, discloses exemplary embodiments of the invention.

BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWINGS
The following drawings are illustrative of particular examples for enabling methods of the present invention, are descriptive of some of the methods, and are not intended to limit the scope of the invention. The drawings are not to scale (unless so stated) and are intended for use in conjunction with the explanations in the following detailed description.
Figure.1 (PRIOR ART) illustrates the stress development in the lower part of the ladle lining
Figure.2 illustrates the lining pattern being used before modification as disclosed in the present invention.
Figure.3 (a) and 3(b) illustrates the shape of the brick before modification and after modification
Figure.4 illustrates the modified lining pattern of the steel ladle.
Figure.5 illustrates the graph for improved lining life of 130T steel ladle.
Persons skilled in the art will appreciate that elements in the figures are illustrated for simplicity and clarity and may have not been drawn to scale. For example, the dimensions of some of the elements in the figure may be exaggerated relative to other elements to help to improve understanding of various exemplary embodiments of the present disclosure.
Throughout the drawings, it should be noted that like reference numbers are used to depict the same or similar elements, features, and structures.

DETAILED DESCRIPTION OF THE INVENTION
The following description with reference to the accompanying drawings is provided to assist in a comprehensive understanding of exemplary embodiments of the invention as defined by the claims and their equivalents. It includes various specific details to assist in that understanding but these are to be regarded as merely exemplary. Accordingly, those of ordinary skill in the art will recognize that various changes and modifications of the embodiments described herein can be made without departing from the scope and spirit of the invention. In addition, descriptions of well-known functions and constructions are omitted for clarity and conciseness.
The terms and words used in the following description and claims are not limited to the bibliographical meanings, but, are merely used by the inventor to enable a clear and consistent understanding of the invention. Accordingly, it should be apparent to those skilled in the art that the following description of exemplary embodiments of the present invention are provided for illustration purpose only and not for the purpose of limiting the invention as defined by the appended claims and their equivalents.
It is to be understood that the singular forms “a,” “an,” and “the” include plural referents unless the context clearly dictates otherwise.
By the term “substantially” it is meant that the recited characteristic, parameter, or value need not be achieved exactly, but that deviations or variations, including for example, tolerances, measurement error, measurement accuracy limitations and other factors known to those of skill in the art, may occur in amounts that do not preclude the effect the characteristic was intended to provide.
Accordingly, present invention provides an improved teeming ladle for carrying the liquid steel having new design of first layer brick(s), therefore enhancing the lining strength of the lower part of wall lining during carryover of liquid steel by reducing the mechanical stress on the wall lining.
The lining pattern being used before modification is shown in figure.2, where the wall lining is in step wise form. Each brick especially in its corner portion, in the lower layers of wall lining gets tremendous stress. During partial repair in cold condition it has been observed that corner of brick gets rounded off or badly flattened due to erosion. Since it is at lower part of the wall lining there is no scope for damaged brick to be repaired or replaced with a new one. Ladle lining repair can only be conducted for middle part of the bottom lining or top part of wall lining at slag zone.
Therefore the lower part of the ladle wall lining needs to be strengthened to match with the lining potential of repairable part of the ladle.
To strengthen the lower part of the steel ladle, present invention provides an improved steel ladle with a new design of first layer brick(s), which carrying liquid steel in steel melting shop as shown in figure 4. In the new designed brick, top surface of the brick is made inclined towards back according to tapering angle of the ladle shell.
Before modification the brick shape was simple. It was tapered only in the front side to accommodate properly in formation of a ring. The present invention provides a modification on top surface of the brick which is made inclined towards back. The inclination on first layer bricks is based on tapering angle of the ladle shell. Modified lining pattern is shown in figure no. 04. Second brick layer of wall lining rests over the top inclined surface of first layer in such a way that the back face of the bricks touches the backup safety lining which is laid along the surface of the ladle shell, completely. This fashion of lining is continued farther for next layers up to the top. This enhances the lining strength of the lower part of wall lining during carryover of 130 Ton liquid steel.
Due to modification in the first layer bricks the lining life increased from around 40 heats to 60 heats providing an improvement of around 50% as shown in figure 5. In the present invention the lining life of steel ladle is improved significantly with change in the design of first layer bricks, without addition to intrinsic value in the quality of bricks.
The new design of first layer bricks also helps in reducing the stress on wall lining of the steel ladle, therefore providing an improved lining life. During operation of the steel ladle, the stress generated from liquid steel is transferred to the ladle shell and brick lining gets relieve from stress to a great extent.
ABBREVIATIONS
AMC: Alumina Magnesia Carbon
MCH: Magmesia Chrome
CHM: Chrome Magnesite
HA: High Alumina
HG: High Grog
FC: Fireclay
Cast: Castable
R-Mass: Ramming Mass