KR-102963643-B1 - Assembling Spheroidization Device for Particulate Matter

Abstract

The present invention relates to an apparatus for assembling and spheroidizing fine particulate materials. Specifically, it is an apparatus for assembling and spheroidizing fine particulate materials such as resin, metal, and graphite.

Inventors

• 정영운
• 오정훈
• 송기완
• 박지용
• 김충래

Assignees

• 주식회사 이지머티리얼즈

Dates

Publication Date

20260513

Application Date

20230607

Claims (10)

1. Input section (A) of fine particulate material to be assembled and sphericalized; Assembly spheroidization section (B) where assembly spheroidization of the input material takes place; Discharge section (C) of assembled and spherical material; and Includes a support member (D); The input section (A) of the fine particulate material that is the object of the assembly conceptualization above is, It may include a raw material input tank (1); a raw material input port (2); a raw material input port on-off cylinder (3); a screw feeder (4); and a screw feeder motor (5). The assembly spheroidization section (B) where the assembly spheroidization of the above-mentioned input material takes place is, It may include a main body (6) where the assembly of the injected material is formed; an air inlet (7); and an air injection on-off cylinder (8). The discharge section (C) of the above-mentioned assembled material is, It may include a product discharge port (9); a product discharge port on-off cylinder (10); and The above support member (D) is, It includes a screw pitter motor support (11); a main body support (12); and The operation of the input section (A) of the fine particulate material to be assembled and sphericalized above is, after the step of i) introducing the fine particulate material to be assembled and sphericalized and the raw material of the auxiliary agent into the raw material input tank (1), ii) After the step of opening the raw material inlet (2) using the inlet ON-OFF cylinder (3), iii) a step of operating the screw feeder (4) using the screw feeder motor (5) while rotating the impeller of the main body to feed all the raw materials to be assembled and sphericalized contained in the raw material injection tank (1) into the main body, and then closing the raw material injection port (2) using the injection port ON-OFF cylinder (3). The main body (6) of the assembly spheroidizing unit (B) in which the assembly spheroidizing of the above-mentioned raw material is performed includes an impeller (6-1) and an impeller shaft (6-2) for rotational operation of the impeller (6-1) inside, and the impeller (6-1) includes an impeller blade (6-1-1). The first stage of the impeller (6-1) has two circular plates, an impeller blade (6-1-1) is positioned between the circular plates, and the impeller blade (6-1-1) is positioned on the outer circle and/or inner circle of the circular plates. The installation angle of the impeller blade (6-1-1) has a predetermined angle with respect to the tangent of the outer circle or inner circle at the location where the impeller blade (6-1-1) is installed, and the predetermined angle is greater than 0 degrees and less than or equal to 90 degrees, and the installation angle of the impeller blade (6-1-1) with respect to the outer circle and inner circle is the same or different, respectively. The above air inlet (7) is directly connected to the main body (6) and is for discharging the assembled material after the operation of the main body (6), in which the assembled material is assembled and spheroidized, is finished, and the discharge operation is characterized by using an air inlet on-off cylinder (8).
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6. In paragraph 1, The spacing of each impeller blade (6-1-1) located in the inner or outer circle is 1 cm or more, and Each impeller blade (6-1-1) located in the inner or outer circle is positioned to intersect each other, and A device for assembling and sphericalizing fine particulate material, characterized in that the number of impeller blades (6-1-1) located in the inner circle or outer circle and intersecting therein is the same or different.
7. In paragraph 1, A device for assembling and spheroidizing fine particulate matter, characterized in that the above impeller (6-1) has one or more stages.
8. In Paragraph 7, A device for assembling and spheroidizing fine particulate material, characterized in that the above impeller (6-1) has 2 to 5 stages.
9. In paragraph 1, A device for assembling and spheroidizing fine particulate matter, characterized in that the above impeller (6) further comprises a heating or cooling function device.
10. A method for manufacturing aggregated spheroidized graphite using an aggregated spheroidizing apparatus for fine particulate material according to any one of claims 1 and 6 to 9, wherein (1) A step of introducing raw materials of graphite fine particles, natural graphite fine particles or artificial graphite fine particles, and a binder, which is an auxiliary agent, into a raw material input tank; (2) Step of opening the input port; (3) A step of operating the screw pitter using a screw pitter motor while the impeller is rotating at 120 m/min or less, thereby feeding all of the raw material in the raw material input tank into the impeller. (4) A step of rotating an impeller into which raw material is fed at 1,800 to 5,400 m/min and 60 to 900 seconds to aggregate and spheroidize the raw material; (5) A step of stopping the operation of the impeller and opening the air inlet and product outlet using an air inlet ON-OFF cylinder and a product outlet ON-OFF cylinder when the assembly spheroidization is finished; characterized by comprising a method for manufacturing assembled spheroidized graphite

Description

Assembling Spheroidization Device for Particulate Matter The present invention relates to an apparatus for assembling and spheroidizing fine particulate materials. Specifically, it is an apparatus for assembling and spheroidizing fine particulate materials such as resin, metal, and graphite. As industry develops, new types of materials are required. In particular, composite materials precisely formed by mixing fine particulate materials are being used in new fields as new materials for, for example, catalysts, sintered bodies, fillers, powder metallurgy, ceramics, toners, powder coatings, hybrid resins, secondary batteries, and various other industrial sectors. In particular, secondary batteries are being used in various fields due to global environmental pollution caused by fossil fuels, and this secondary battery sector is one that requires new materials even more. The demand for secondary batteries as an energy source is surging due to the development and demand for mobile electronic devices such as PDAs, mobile phones, and laptop computers. Additionally, the demand for batteries for electric vehicles and energy storage systems is skyrocketing due to the rapid growth of the electric vehicle market driven by global regulations on fuel efficiency and exhaust emissions. Consequently, research on secondary batteries is actively underway, and among them, research on lithium-ion batteries is the most active due to their ease of design and the potential for improved capacity and lifespan. Currently, graphite is used as the negative electrode active material for lithium-ion batteries, and typically, graphite is crystalline graphite, consisting of artificial graphite and natural graphite. Natural graphite has a flake-like form due to the mining process. When flake-like graphite particles are used as a negative electrode active material, the uniformity of slurry coating during electrode manufacturing is reduced due to the anisotropic characteristics of the particle shape. Furthermore, there are problems in that the flake-like graphite particles become oriented along the current collector due to rolling and pressing pressure, significantly degrading the battery's performance. Therefore, currently commercialized natural graphite utilizes spherical natural graphite, in which flake-like graphite particles are sphericalized. Meanwhile, spheroidization using fine particles of natural graphite is known by methods such as rotating the natural graphite particles within a powder processing device or dropping them into a Z-shaped device (Patent Documents 1, 2). However, the aforementioned known technologies have the disadvantage of low efficiency due to the generation of graphite fine powder during spheroidization, or the complexity of the spheroidization device. Therefore, in the spheroidization of resins and metals, such as the spheroidization of natural or artificial graphite, it is important to have a device that suppresses the generation of fine particles of graphite, resin, or metal while obtaining spheroidized materials of uniform size and achieving high processing efficiency, and simplifies the spheroidization process; thus, the development of such a device is necessary. FIG. 1 is a schematic diagram showing an assembly and spherical device for fine particulate materials according to the present invention. FIG. 2 is a figure showing an impeller and an impeller blade included in the main body of the particulate material assembly spheroidizing device of the present invention. Figure 3 is a figure showing the angle of the impeller blade included in the main body of the particulate material assembly spheroidization device of the present invention. FIG. 4 is a figure showing a main body equipped with an impeller of the assembly spheroidizing device for fine particulate matter according to the present invention. FIG. 5 is a figure showing a two-stage impeller including an impeller shaft included in the main body of the particulate material assembly spheroidizing device of the present invention. Unless otherwise defined, all terms used in this specification (including technical and scientific terms) may be used in a meaning that is commonly understood by those skilled in the art to which the present invention pertains, and singular forms include plural forms unless specifically defined in the text. In this specification, when a part such as a layer, film, region, or plate is described as being “on” or “on” another part, it includes not only the part immediately above the other part but also cases where there is another part in between. Furthermore, in this specification, the expressions “on” or “above” mean being located above or below the subject part, and do not imply an upper side related to gravity. Hereinafter, the apparatus for assembling and sphericalizing fine particulate materials according to the present invention will be described. This is presented as an example and is not intended to limit the invention, and th