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KR-20260064108-A - CHARCOAL USING COKE WASTE POWDER AND METHOD OF MANUFACTURING THE SAME

KR20260064108AKR 20260064108 AKR20260064108 AKR 20260064108AKR-20260064108-A

Abstract

A fuel coal using coke waste powder and a method for manufacturing the same are disclosed. The fuel coal according to the present invention comprises 70 to 95 weight percent of coke powder and 5 to 30 weight percent of tar. Let the ignition temperature and calorific value of the fuel coal be A (°C) and B (kcal/kg), and let the ignition temperature and calorific value of the fuel coal composed only of coke powder be A0 (°C) and B0 (kcal/kg), then A < A0, B > B0.

Inventors

  • 신윤경
  • 허준

Assignees

  • (주)포스코퓨처엠

Dates

Publication Date
20260507
Application Date
20241031

Claims (10)

  1. Fuel coal comprising 70 to 95 weight percent coke powder and 5 to 30 weight percent tar.
  2. In paragraph 1, Fuel coal containing 10 to 20 weight percent of the above tar.
  3. In paragraph 1, The above tar is a fuel coal that is an evaporative product generated by heating either a selected petroleum-based or coal-based pitch to 115 to 400°C.
  4. In paragraph 1, The above fuel coal is a fuel coal having a fixed carbon ratio of 87 to 93 weight percent.
  5. In paragraph 1, Let the ignition temperature and calorific value of the above fuel coal be A (°C) and B (kcal/kg), and let the ignition temperature and calorific value of the above fuel coal composed solely of fine coke be A0 (°C) and B0 (kcal/kg), Fuel coal where A < A0, B > B0.
  6. In paragraph 5, Fuel coal in which the absolute value of (B-B0)/(A-A0) is 1.5 or less.
  7. A step of forming a mixture by mixing 70-95% by weight of coke powder and 5-30% by weight of tar; and A method for manufacturing fuel coal comprising the step of molding the above mixture.
  8. In Paragraph 7, A method for manufacturing fuel coal, wherein the above mixture contains 10 to 20 weight percent of the above tar.
  9. In Paragraph 7, A method for manufacturing fuel coal, wherein the above mixture has a fixed carbon ratio of 87 to 93 weight percent.
  10. In Paragraph 7, A method for manufacturing fuel coal by molding the above mixture without drying.

Description

Fuel coal using coke waste powder and method of manufacturing the same {CHARCOAL USING COKE WASTE POWDER AND METHOD OF MANUFACTURING THE SAME} The present invention relates to a technology for utilizing fine coke powder generated in processes such as the manufacturing of artificial graphite for negative electrode materials of lithium secondary batteries or the manufacturing process of coke for metallurgy. More specifically, the present invention relates to fuel coal using coarse waste powder and a method for manufacturing the same. Recently, a lot of research has been conducted on waste recycling. A representative example is the production of fuel coal using sewage sludge, livestock manure, etc. For example, sewage sludge is a residue generated during the sewage treatment process and was generally disposed of by incineration or landfill, but recently it is being recycled and utilized as a material for fuel coal. Patent Document 1 discloses a method for manufacturing fuel coal by recycling sewage sludge. In the case of manufacturing fuel briquettes using sewage sludge, storage and processing are difficult due to moisture and odor issues, especially during the summer months. Consequently, it is necessary to pre-treat sewage sludge through processes such as incineration, carbonization, and solidification; however, this process can lead to secondary environmental pollution through the emission of pollutants, such as odors and condensate. Furthermore, removing fuel briquettes from sewage sludge requires moisture removal, molding, and re-drying processes, which result in excessive energy consumption. Meanwhile, much research is being conducted on coke waste powder from the perspective of waste recycling. Coke waste powder with a particle size of about 10㎛ or less is generated in the manufacturing process of artificial graphite for lithium-ion battery anode materials or in the manufacturing process of metallurgical coke. This coke waste powder is simply stored or discarded. It may be considered to manufacture fuel coal using fine coke waste. Unlike sewage sludge, fine coke waste has the advantage of being used without a separate drying process. When manufacturing fuel coal using fine coke, the primary considerations are shape retention, calorific value, and ignition temperature. Since fine coke with a small particle size is difficult to maintain its shape on its own, it is necessary to first resolve this shape issue by using a binder. Additionally, when using a binder, it is necessary to address the problems of reduced calorific value and increased ignition temperature. FIG. 1 is a flowchart schematically illustrating a method for manufacturing fuel coal using waste coke powder according to the present invention. Figure 2 shows the ignition temperature and heat generation of each fuel sample. The aforementioned objectives, features, and advantages are described in detail below with reference to the attached drawings, thereby enabling those skilled in the art to easily implement the technical concept of the present invention. In describing the present invention, detailed descriptions of known technologies related to the present invention are omitted if it is determined that such descriptions would unnecessarily obscure the essence of the invention. Hereinafter, preferred embodiments according to the present invention will be described in detail with reference to the attached drawings. In the drawings, the same reference numerals are used to indicate the same or similar components. In the following, the statement that any configuration is placed on the "upper (or lower)" of a component or on the "upper (or lower)" of a component may mean not only that any configuration is placed in contact with the upper (or lower) surface of said component, but also that another configuration may be interposed between said component and any configuration placed on (or below) said component. The following describes in detail the fuel coal using coke waste powder and the method for manufacturing the same according to a preferred embodiment of the present invention. The present invention provides fuel coal and a method for manufacturing the same by utilizing fine coke powder generated in processes such as the manufacturing process of artificial graphite for negative electrode materials of lithium secondary batteries or the manufacturing process of coke for metallurgy. The fuel coal according to an embodiment of the present invention comprises fine coke powder as a main component and tar as a binder. The coke powder may, for example, have an average particle size (vol D50) of 10 μm or less, preferably 7 μm or less, and more preferably 3 to 5 μm. The coke powder may, for example, be needle coke waste powder generated in the process of manufacturing artificial graphite for negative electrode materials of lithium secondary batteries. In addition, the coke powder may be generated through various routes, such as coke waste powder generated