KR-20260066251-A - Binder for Carbon Powder and Formed Charcoal Having the Same

Abstract

The present invention relates to a binder for carbon powder and a molded coal containing the same. The molded coal of the present invention can be used as an energy source or a carbon source by being introduced during a steelmaking process. A binder for carbon powder according to an embodiment of the present invention comprises methylcellulose and gelatinized starch. One embodiment may further comprise a sodium-based additive and refractory clays.

Inventors

• 정재창

Assignees

• 주식회사 강림퓨얼테크

Dates

Publication Date

20260512

Application Date

20241104

Claims (5)

1. Comprising methylcellulose and gelatinized starch, Binder for carbon powder.
2. In paragraph 1, The content ratio of the above methylcellulose and gelatinized starch is 1:2 to 1:2.8 based on weight, Binder for carbon powder.
3. In paragraph 1, Further comprising sodium-based additives and refractory clays, Binder for carbon powder.
4. It includes carbon powder and a binder for carbon powder, The above-mentioned binder for carbon powder is that of claim 1, Shaped bullet.
5. Step of supplying raw ore to the furnace; and It includes the step of supplying molded coal to the above furnace, and The above-mentioned molded charcoal is that of paragraph 4, Steelmaking process.

Description

Binder for Carbon Powder and Formed Charcoal Having the Same The present invention relates to a binder for carbon powder and a molded coal containing the same. The molded coal of the present invention can be used as an energy source or a carbon source by being introduced during a steelmaking process. Charcoal powder is supplied in the form of briquettes or pellets in the steelmaking process and used as a material for heat or carbon sources. Supplying it in this form maximizes energy efficiency and ensures ease of handling during transportation and processing. In conventional charcoal powder processing methods, various binders have been used to bind the charcoal powder and mold it into briquettes or pellets. These binders are primarily composed of starch, clay, coal tar, and petroleum-based binders, and they provide shape stability by offering binding strength to the powder. However, when using conventional binders, there were problems such as insufficient mechanical strength causing molded briquettes or pellets to break easily during handling, insufficient heat resistance resulting in weak bonding at high temperatures causing the product to decompose easily, and the inclusion of harmful components like petroleum-based materials or coal tar causing negative environmental impacts. FIG. 1 is a flowchart of a method for manufacturing molded charcoal according to an embodiment of the present invention. FIG. 2 is a flowchart of a method for manufacturing a steelmaking process according to an embodiment of the present invention. Hereinafter, preferred embodiments of the present invention are described as follows with reference to the attached drawings. However, embodiments of the present invention may be modified in various other forms, and the scope of the present invention is not limited to the embodiments described below. Furthermore, embodiments of the present invention are provided to more completely explain the present invention to those skilled in the art. A binder for carbon powder according to an embodiment of the present invention comprises methylcellulose and gelatinized starch. One embodiment may further comprise a sodium-based additive and refractory clays. The above methylcellulose serves to bind the charcoal powder particles together and increases the viscosity of the mixture, thereby aiding in stable molding. It also contributes to maintaining strength even after drying. The above-mentioned methylcellulose is a substance produced by chemically modifying cellulose, and it has the characteristic of dissolving well in water and forming viscosity. Specifically, the above-mentioned methylcellulose is a compound derived from cellulose, obtained by methylating cellulose extracted from natural plant fibers. Its chemical formula isC6H7O2 (OH) x ( OCH3 ) y , and it has a structure in which the hydroxyl (OH) group of cellulose is replaced by a methoxy ( -OCH3 ) group. The chemical structural formula of the above-mentioned methylcellulose is as follows. [Chemical Structure Formula 1] In one embodiment, the methylcellulose may be in a gel state, and may have a viscosity of 50,000 MPa·s or more, preferably 100,000 MPa·s. By limiting the viscosity, higher adhesive strength can be provided. In the present invention, the content of the methylcellulose may be 10 to 20%, preferably 13 to 17%, based on the total weight of the binder for the carbon powder. If the content of the methylcellulose is too high, it may cause excessive viscosity, which can reduce the processability of the mixture. This increases the likelihood of creating a non-uniform structure during molding. Conversely, if the content is too low, the binding force weakens, the charcoal powder does not aggregate sufficiently, and the strength decreases, which may lower the stability of the molded product. The gelatinized starch increases viscosity and reacts with water to aid in bonding between powder particles. It contributes to the strength and structural stability of the molded product. The gelatinized starch, together with the methylcellulose, mutually complements the properties of the molded charcoal. The methylcellulose and gelatinized starch increase adhesion and improve the strength of the manufactured molded charcoal. Additionally, while the gelatinized starch may present issues such as particle expansion at very high temperatures, this can be compensated for by the high-temperature stability of the methylcellulose. Furthermore, since the methylcellulose has the property of retaining moisture, the dispersibility and viscosity can be improved by ensuring that the gelatinized powder retains sufficient moisture. The above-mentioned gelatinized starch is produced by heating starch to break hydrogen bonds within the crystal structure and making it into an amorphous structure. In one embodiment, it may be prepared by heating raw materials for gelatinized starch, such as corn starch, potato starch, wheat starch, or tapioca starch , to 60 to 80°C. The chem