TECHNICAL FIELD

[0001] The present disclosure relates generally to the technical field of sinter machine. In particular, the present disclosure pertains to a permeability rod assembly for a sinter machine.

BACKGROUND
[0002] Background description includes information that may be useful in understanding the present invention. It is not an admission that any of the information provided herein is prior art or relevant to the presently claimed invention, or that any publication specifically or implicitly referenced is prior art.
[0003] Sintering process is a typical counter-current gas-solid reaction process. Typically, sinter-making starts with the preparation of a raw mixture from iron ores, fluxes, in-plant dust and spillage fines, solid fuel and return fines. These materials are mixed and granulated in one or more stages. Water is added in order to assist the raw mixture in obtaining optimum permeability by making granules. The raw mixture is charged onto a sinter machine and then ignited from the top. The air being sucked through the ignited layer and thus layer by layer sintering proceeds in vertical direction on sinter strand. When the process advances, moisture in the upper layer get vaporised, moves downward with hot air and re-condense in the bottom layers. This hampers the bottom layer bed permeability and air filtration through these layers and hence sintering speed. The problem is countered by proper segregation of the charge mixture on sinter bed during charging such as larger size granules are placed at bottom portion/sinter bed. Sinter strand production rate is directly related to the permeability of the mixture and the quasi-static particles distribution.
[0004] Goethite rich hematite iron ore fines have chemically bonded water about 5-6% and higher loss on ignition (LOI) value. This additional moisture gets evolved out during sintering process at temperature from 250-450°C and condenses at the bottom layers. The goethite rich hematite iron ore fines further increases moisture level of sinter charge mixture and hampers the bed permeability. The goethite rich hematite iron ore fines also disintegrates the micro pellets formed during balling process and hence results in reduction of vertical sintering speed (VSS) and machine productivity. Additionally, use of the goethite rich iron ore for sintering has adverse effect on melt fluidity at high temperature zone and reduces air movement by thermal sealing. All these, collectively reduces the bed permeability of bottom layers at the sinter bed and contributes in reduced air filtration velocity and hence the productivity.
[0005] A conventional technique includes use of permeability bars made of mild steel to take care of above stated problem in the sinter making by creating additional voids at the bottom layers of the sinter bed. These permeability bars are fixed with fixing arrangement and hangs at a particular position of the empty sinter bed along the length of the bed. When raw charge mixture is charged in moving grates of sinter machine, these permeability bars get covered with the charge mixture. With the forward movement of the sinter machine, these bars create voids of its dimension. These early gaps make lower portion of the sinter bed more permeable and can take care of moisture re-condensation. However, these permeability bars are have life duration of about 4-5 months only as these permeability bars are made of mild steel and due to high rubbing action at the sinter bed, gets reduced in dimension. Replacement of these permeability bars takes ample amount of time and money.
[0006] There is, therefore a need in the art to provide an improved, efficient, and cost effective permeability rod for a sinter machine which can obviate above mentioned challenges in the art.
[0007] As used in the description herein and throughout the claims that follow, the meaning of “a,” “an,” and “the” includes plural reference unless the context clearly dictates otherwise. Also, as used in the description herein, the meaning of “in” includes “in” and “on” unless the context clearly dictates otherwise.
[0008] In some embodiments, the numerical parameters set forth in the written description and attached claims are approximations that can vary depending upon the desired properties sought to be obtained by a particular embodiment. In some embodiments, the numerical parameters should be construed in light of the number of reported significant digits and by applying ordinary rounding techniques. Notwithstanding that the numerical ranges and parameters setting forth the broad scope of some embodiments of the invention are approximations, the numerical values set forth in the specific examples are reported as precisely as practicable. The numerical values presented in some embodiments of the invention may contain certain errors necessarily resulting from the standard deviation found in their respective testing measurements.
[0009] The recitation of ranges of values herein is merely intended to serve as a short hand method of referring individually to each separate value falling within the range. Unless otherwise indicated herein, each individual value is incorporated into the specification as if it were individually recited herein. All methods described herein can be performed in any suitable order unless otherwise indicated herein or otherwise clearly contradicted by context. The use of any and all examples, or exemplary language (e.g. “such as”) provided with respect to certain embodiments herein is intended merely to better illuminate the invention and does not pose a limitation on the scope of the invention otherwise claimed. No language in the specification should be construed as indicating any non-claimed element essential to the practice of the invention.
[0010] Groupings of alternative elements or embodiments of the invention disclosed herein are not to be construed as limitations. Each group member can be referred to and claimed individually or in any combination with other members of the group or other elements found herein. One or more members of a group can be included in, or deleted from, a group for reasons of convenience and/or patentability. When any such inclusion or deletion occurs, the specification is herein deemed to contain the group as modified thus fulfilling the written description of all groups used in the appended claims.

OBJECTS OF THE INVENTION
[0011] A general object of the present disclosure is to provide an improved permeability rod for a sinter machine.
[0012] Another object of the present disclosure is to provide a rod assembly/permeability rod assembly for a sinter machine.
[0013] Another object of the present disclosure is to provide an improved permeability road assembly for a sinter machine having to improve performance of the sinter machine.
[0014] Another object of the present disclosure is to provide an efficient and cost effective permeability rod assembly for a sinter machine that can be easily implemented to increase efficiency of the sinter machine.

SUMMARY
[0015] The present disclosure relates generally to the technical field of sinter machine. In particular, the present disclosure pertains to a permeability rod assembly for a sinter machine to enhance performance of the sinter machine.
[0016] In another aspect of the present disclosure provides a rod assembly/permeability rod assembly for a sinter machine, the rod assembly comprising a steel rod having a composition in weight percentage comprising carbon (C) in amount ranging from 0.95 to 1.2%, manganese (Mn) in amount ranging from 0.3 to 0.75%, chromium (Cr) in amount ranging from 1.00 to 1.60%, silicon (Si) in amount ranging from 0.10 to 0.35%, sulphur (S) in amount ranging from 0.03 to 0.050%, and phosphorus (P) in amount ranging from 0.030 to 0.050%; and a seamless pipe, wherein the seamless pipe is adapted to enclose the steel rod.
[0017] In an embodiment, the seamless pipe is made of mild steel.
[0018] In an aspect, the present disclosure provides a steel rod/permeability rod for a sinter machine, the steel rod having a composition, in weight percentage, comprising carbon (C) in amount ranging from 0.95 to 1.2%, manganese (Mn) in amount ranging from 0.3 to 0.75%, chromium (Cr) in amount ranging from 1.00 to 1.60%, silicon (Si) in amount ranging from 0.10 to 0.35%, sulphur (S) in amount ranging from 0.03 to 0.050%, and phosphorus (P) in amount ranging from 0.030 to 0.050%.
[0019] Those skilled in the art will further appreciate the advantages and superior features of the disclosure together with other important aspects thereof on reading the detailed description that follows in conjunction with the drawings.

BRIEF DESCRIPTION OF THE DRAWINGS
[0020] The accompanying drawings are included to provide a further understanding of the present disclosure, and are incorporated in and constitute a part of this specification. The drawings illustrate exemplary embodiments of the present disclosure and, together with the description, serve to explain the principles of the present disclosure.
[0021] FIG. 1A to 1C illustrate exemplary representations of side view, sectional views of implementation of a plurality of permeability rod assembly in a sinter machine, in accordance with an embodiment of the present disclosure.
[0022] FIG.2 illustrates an exemplary graphical representation of air filtration velocity measured on top of a sinter bed of a sinter machine during sintering operation with permeability rod and without permeability rod assembly, in accordance with an embodiment of the present disclosure.
[0023] FIG. 3 illustrates an exemplary graphical representation of productivity of a sinter machine after implementation of the permeability rod assembly in the sinter machine, in accordance with an embodiment of the present disclosure.

DETAILED DESCRIPTION
[0024] The following is a detailed description of embodiments of the disclosure depicted in the accompanying drawings. The embodiments are in such details as to clearly communicate the disclosure. However, the amount of detail offered is not intended to limit the anticipated variations of embodiments; on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the present disclosure as defined by the appended claims.
[0025] If the specification states a component or feature “may”, “can”, “could”, or “might” be included or have a characteristic, that particular component or feature is not required to be included or have the characteristic.
[0026] Exemplary embodiments will now be described more fully herein after with reference to the accompanying drawings, in which exemplary embodiments are shown. This disclosure may however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. These embodiments are provided so that this disclosure will be thorough and complete and will fully convey the scope of the disclosure to those of ordinary skill in the art. Moreover, all statements herein reciting embodiments of the disclosure, as well as specific examples thereof, are intended to encompass both structural and functional equivalents thereof. Additionally, it is intended that such equivalents include both currently known equivalents as well as equivalents developed in the future (i.e., any elements developed that perform the same function, regardless of structure).
[0027] Various terms as used herein are shown below. To the extent a term used in a claim is not defined below, it should be given the broadest definition persons in the pertinent art have given that term as reflected in printed publications and issued patents at the time of filing.
[0028] Embodiments explained herein relate to an improved permeability rod assembly for a sinter machine to enhance performance of the sinter machine. In an aspect, the present disclosure also provides a permeability rod for the sinter machine.
[0029] In embodiment, the disclosed rod assembly/permeability rod assembly for the sinter machine can include the steel rod having a composition in weight percentage comprising carbon (C) in amount ranging from 0.95 to 1.2%, manganese (Mn) in amount ranging from 0.3 to 0.75%, chromium (Cr) in amount ranging from 1.00 to 1.60%, silicon (Si) in amount ranging from 0.10 to 0.35%, sulphur (S) in amount ranging from 0.03 to 0.050%, and phosphorus (P) in amount ranging from 0.030 to 0.050%; and a seamless pipe made of mild steel.
[0030] In an aspect, the seamless pipe can be adapted to enclose the steel rod using cadmium coated mild steel nut, and M12 bolts.
[0031] In an exemplary embodiment, the steel rod can be 3500 mm long, and having diameter of 28mm.
[0032] In an embodiment, the permeability rod is made of wear resistant steel.
[0033] In an exemplary embodiment, the seamless pipe can be of an outer diameter 42.16mm, an inner diameter 32.45mm, and of 500mm length.
[0034] In an embodiment, durability of the permeability rod is also increased by more than five times as compared to the conventional permeability bar.
[0035] In an aspect, a steel rod (also referred to as permeability rod hereinafter) for a sinter machine having a composition in weight percentage comprising carbon (C) in amount ranging from 0.95 to 1.2%, manganese (Mn) in amount ranging from 0.3 to 0.75%, chromium (Cr) in amount ranging from 1.00 to 1.60%, silicon (Si) in amount ranging from 0.10 to 0.35%, sulphur (S) in amount ranging from 0.03 to 0.050%, and phosphorus (P) in amount ranging from 0.030 to 0.050%.
[0036] FIG. 1A to 1C illustrate exemplary representations of side view sectional views of implementation of aplurality of permeability rod assembly in a sinter machine, in accordance with an embodiment of the present disclosure. As shown, the plurality of permeability rod assembly 102 can be placed in layers to loosen the charged sinter material in bottom and middle layer in the sinter machine.
[0037] In an exemplary embodiment, distance between two layers of the plurality of permeability rod assembly 102 can be 200mm. In an exemplary embodiment, in bottom layer a total number of 10 permeability rod assemblies 102 can be placed and in middle layer a total number of 9 permeability rod assemblies 102 can be placed with a horizontal shift of 150mm from the bottom layer.
[0038] In an exemplary embodiment, horizontal distance between two rods assembly can be 300mm. Distance from grate bar to the first rod layer can be 130mm.
[0039] In an embodiment, productivity of the sinter machine can be improved from 1.35 to 1.36 t/m2/hr. i.e. about 0.75%.
[0040] FIG. 2 illustrates an exemplary graphical representation of air filtration velocity measured on top of a sinter bed of a sinter machine during sintering operation with permeability rod assembly and without permeability rod assembly, in accordance with an embodiment of the present disclosure. As shown, a curve 202 represent the air filtration velocity when the permeability rod assemblies are used in the sinter machine, and a curve 204 represent the air filtration velocity when the permeability rod assemblies are not used in the sinter machine
[0041] FIG. 3 illustrates an exemplary graphical representation of productivity of a sinter machine after implementation of the permeability rod assembly in the sinter machine, in accordance with an embodiment of the present disclosure.
[0042] It should be apparent to those skilled in the art that many more modifications besides those already described are possible without departing from the inventive concepts herein. The inventive subject matter, therefore, is not to be restricted except in the spirit of the appended claims. Moreover, in interpreting both the specification and the claims, all terms should be interpreted in the broadest possible manner consistent with the context. In particular, the terms “comprises” and “comprising” should be interpreted as referring to elements, components, or steps in a non-exclusive manner, indicating that the referenced elements, components, or steps may be present, or utilized, or combined with other elements, components, or steps that are not expressly referenced. Where the specification claims refers to at least one of something selected from the group consisting of A, B, C ….and N, the text should be interpreted as requiring only one element from the group, not A plus N, or B plus N, etc. The foregoing description of the specific embodiments will so fully reveal the general nature of the embodiments herein that others can, by applying current knowledge, readily modify and/or adapt for various applications such specific embodiments without departing from the generic concept, and, therefore, such adaptations and modifications should and are intended to be comprehended within the meaning and range of equivalents of the disclosed embodiments. It is to be understood that the phraseology or terminology employed herein is for the purpose of description and not of limitation. Therefore, while the embodiments herein have been described in terms of preferred embodiments, those skilled in the art will recognize that the embodiments herein can be practiced with modification within the spirit and scope of the appended claims.
[0043] While the foregoing describes various embodiments of the invention, other and further embodiments of the invention may be devised without departing from the basic scope thereof. The scope of the invention is determined by the claims that follow. The invention is not limited to the described embodiments, versions or examples, which are included to enable a person having ordinary skill in the art to make and use the invention when combined with information and knowledge available to the person having ordinary skill in the art.

ADVANTAGES OF THE INVENTION
[0044] The present disclosure provides an improved permeability rod for a sinter machine.
[0045] The present disclosure provides a rod assembly/permeability rod assembly for a sinter machine.
[0046] The present disclosure provides an improved permeability road assembly for a sinter machine to improve performance of the sinter machine.
[0047] The present disclosure provides an efficient and cost effective permeability rod assembly for a sinter machine that can be easily implemented to increase efficiency of the sinter machine.

Claims:

1. A rod assembly for a sinter machine, the rod assembly comprising:
a steel rod having a composition in weight percentage comprising carbon (C) in amount ranging from 0.95 to 1.2%, manganese (Mn) in amount ranging from 0.3 to 0.75%, chromium (Cr) in amount ranging from 1.00 to 1.60%, silicon (Si) in amount ranging from 0.10 to 0.35%, sulphur (S) in amount ranging from 0.03 to 0.050%, and phosphorus (P) in amount ranging from 0.030 to 0.050%; and a seamless pipe, where in the seamless pipe is adapted to enclose the steel rod.

2. The rod assembly as clamed in claim 1, wherein the seamless pipe is made of mild steel.

3. A steel rod, the steel rod having a composition in weight percentage comprising carbon (C) in amount ranging from 0.95 to 1.2%, manganese (Mn) in amount ranging from 0.3 to 0.75%, chromium (Cr) in amount ranging from 1.00 to 1.60%, silicon (Si) in amount ranging from 0.10 to 0.35%, sulphur (S) in amount ranging from 0.03 to 0.050%, and phosphorus (P) in amount ranging from 0.030 to 0.050%.