KR-20260063270-A - SAGGER ASSEMBLY INCREASED HEAT TRANSFER EFFICIENCY

KR20260063270AKR 20260063270 AKR20260063270 AKR 20260063270AKR-20260063270-A

Abstract

The present invention provides a crucible assembly with increased heat transfer efficiency capable of increasing the heat transfer efficiency to a raw material contained within the crucible. The crucible assembly may include i) a crucible in which a raw material is contained and heated to be fired while moving within a firing furnace equipped with a heater, and ii) a plurality of structures disposed within the crucible to increase the heat transferred from the heater to the raw material. The plurality of structures may be disposed so as to be spaced apart from each other by a predetermined distance within the crucible.

Inventors

전영환
이민형
주효인
최병록
임동현

Assignees

(주)포스코퓨처엠

Dates

Publication Date: 20260507
Application Date: 20241030

Claims (15)

A crucible in which raw materials are contained and heated to be fired while moving within a kiln equipped with a heater; and A plurality of structures disposed within the crucible to increase the heat transferred from the heater to the raw material Includes, A plurality of the above structures are, A crucible assembly with increased heat transfer efficiency, arranged to be spaced apart from each other by a predetermined distance within the above crucible.
In paragraph 1, The heater is positioned at the top and bottom of the kiln and emits heat toward the crucible located in the center. The above crucible is named a middle crucible, and The above middle stone is, A crucible assembly with increased heat transfer efficiency that is heated while moving within the kiln while positioned between a base crucible located below the middle crucible and an upper crucible located above the middle crucible.
In paragraph 1, In the raw material within the above-mentioned crucible, a grid area is formed to create holes by an external device, and a crushing area is formed to crush the particle size so as to reduce it. The above structure is, A crucible assembly with increased heat transfer efficiency disposed in an area other than the grid area and the crushing area within the crucible.
In paragraph 3, The above structure extends upward from the inner bottom surface of the crucible with a predetermined thickness and width, and The height of the above structure is, A crucible assembly with increased heat transfer efficiency, which is lower than the height of the crucible and higher than the height of the raw material filled inside the crucible.
In paragraph 4, When the height of the above crucible is H, The height d of the raw material filled into the above crucible is 0.56H to 0.59H, and A crucible assembly with increased heat transfer efficiency, wherein the height h of the above structure is 0.9H.
In paragraph 1, The above structure is a crucible assembly with increased heat transfer efficiency, integrally formed from the same material as the crucible.
In paragraph 3, The above structure is, When viewed from the top, it includes a first structure, a second structure, a third structure, and a fourth structure spaced apart from each other at the upper, lower, left, and right sides, respectively, from the center of the crucible, and The first structure, the second structure, the third structure, and the fourth structure are a crucible assembly with increased heat transfer efficiency that extends upward from the inner bottom surface of the crucible with a predetermined thickness and width.
In Paragraph 7, When viewed from above, the first structure is arranged to extend in the horizontal direction, and When viewed from above, the second structure is arranged to extend horizontally, spaced apart from the first structure, and When viewed from above, the third structure is positioned between one side of the first structure and the second structure and is positioned to extend in a vertical direction, and When viewed from the top, the fourth structure is positioned between the other side of the first structure and the second structure, and is a crucible assembly with increased heat transfer efficiency that is positioned to extend in a vertical direction.
In paragraph 8, The first structure, the second structure, the third structure, and the fourth structure are, A crucible assembly with increased heat transfer efficiency disposed in an area other than the grid area and the crushing area within the crucible.
In Paragraph 7, The first structure, the second structure, the third structure, and the fourth structure are, respectively A support member extending in one direction when viewed from above; A first extension portion extending perpendicularly to the support portion from one end portion of the support portion when viewed from above; and A second extension extending perpendicularly to the support member from the other end of the support member so as to be spaced apart and parallel to the first extension member when viewed from above. A crucible assembly with increased heat transfer efficiency including
In Paragraph 10, The first structure, the second structure, the third structure, and the fourth structure are, Each of the above-mentioned support members is spaced apart from the center of the crucible when viewed from above, and A crucible assembly with increased heat transfer efficiency, wherein each of the first extension and the second extension is arranged to extend away from the center of the crucible from the support when viewed from above.
In Paragraph 11, The above support member, the above first extension member, and the above second extension member are A crucible assembly with increased heat transfer efficiency disposed in an area other than the grid area and the crushing area within the crucible.
In Paragraph 7, The first structure, the second structure, the third structure, and the fourth structure are, respectively A center section extending in one direction when viewed from the top; A first flange portion extending perpendicularly to the center portion from one side of the center portion when viewed from above; and A second flange portion extending perpendicularly to the center portion from the other side of the center portion so as to be spaced apart and parallel to the first flange portion when viewed from the upper side. A crucible assembly with increased heat transfer efficiency including
In Paragraph 13, The first structure, the second structure, the third structure, and the fourth structure are, Each of the above-mentioned center portions is positioned adjacent to the inner surface of the crucible when viewed from the top, and A crucible assembly with increased heat transfer efficiency, wherein each of the first flange portion and the second flange portion is arranged to extend from the center portion toward the center of the crucible when viewed from the upper side.
In Paragraph 14, The above center portion, the above first flange portion, and the above second flange portion are A crucible assembly with increased heat transfer efficiency disposed in an area other than the grid area and the crushing area within the crucible.

Description

SAGGE RASSEMBLY INCREASED HEAT TRANSFER EFFICIENCY The present invention relates to a crucible assembly with increased heat transfer efficiency capable of increasing the heat transfer efficiency to raw materials contained inside the crucible. A crucible is heated to be fired while moving within a kiln equipped with a heater, in which raw materials are contained. Such a crucible (sagger) is called a saga or refractory container and is a refractory container capable of withstanding a high-temperature firing process in which materials such as lithium and metal oxides, which are raw materials for secondary batteries, are contained. The heat treatment firing process of the crucible is performed sequentially by a filling process in which raw materials are filled into the crucible, a lattice process in which a lattice is formed on the raw materials, a stacking process in which the crucibles are stacked in multiple layers (for example, 3 layers and 4 columns), a firing process in which the crucibles are fired in a firing furnace, a layer separation process in which the crucibles stacked in multiple layers are separated into single layers, a crushing process in which the raw materials are crushed, and an inversion process in which the raw materials are compressed using a roll mill. In the case of the firing process among the above processes, a first crucible placed at the bottom, a second crucible placed in the center, and a third crucible placed at the top are sequentially stacked and moved by a roller inside the firing furnace, and are heated and fired in the order of a heating zone, a holding zone, and a cooling zone. This firing furnace includes an RHK (Roller Hearth Kiln) firing furnace, and heaters are placed at the top and bottom of the firing furnace to radiate heat toward the crucibles. However, heat transfer is easy to the raw materials in the first and third crucibles, so firing is performed normally. But since the second crucible is placed between the first and third crucibles, there is a problem in that heat transfer is not good to the raw materials in the second crucible, which is located in the central part of the second stage. Consequently, the raw materials in the second crucible have a high BET (Brunauer-Emmett-Teller) value, which leads to a problem of unsuitable quality of the raw materials. Therefore, there is a need for a device that can increase the thermal efficiency transferred to the raw material in the second crucible located in the center. FIG. 1 is a drawing showing a crucible assembly according to a first embodiment of the present invention being fired in a kiln. Figure 2 is a front view of the side cross-section of the crucible assembly of Figure 1. Figure 3 is a top view of the crucible assembly of Figure 1. FIG. 4 is a top view of a crucible assembly according to a second embodiment of the present invention. FIG. 5 is a top view of a crucible assembly according to a third embodiment of the present invention. Hereinafter, various embodiments of the present invention will be described in detail with reference to the attached drawings so that those skilled in the art can easily implement the present invention. The present invention may be embodied in various different forms and is not limited to the embodiments described herein. To clearly explain the present invention, parts unrelated to the explanation have been omitted, and the same reference numerals are used for identical or similar components throughout the specification. Furthermore, the size and thickness of each component shown in the drawings are depicted arbitrarily for convenience of explanation, and thus the present invention is not necessarily limited to what is illustrated. Thicknesses have been enlarged in the drawings to clearly represent various layers and regions. Additionally, for convenience of explanation, the thickness of some layers and regions has been exaggerated in the drawings. Furthermore, throughout the specification, when a part is described as "including" a certain component, this means that, unless specifically stated otherwise, it does not exclude other components but may include additional components. Additionally, throughout the specification, the 'upper part', 'upper', 'upper', or 'upper surface' of a component refers to an end, part, section, or surface of a component that is relatively higher in the drawing, and the 'lower part', 'lower', 'lower', or 'lower surface' of a component refers to an end, part, section, or surface of a component that is relatively lower in the drawing. Hereinafter, embodiments of the present invention will be described in detail with reference to the attached drawings. FIG. 1 is a drawing showing a crucible assembly (10) according to a first embodiment of the present invention being fired in a kiln (F) with the crucible assembly (10) placed between a base crucible (B) and an upper crucible (U); FIG. 2 is a drawing of the side cross-section of the crucible assembly (10) of