KR-20260067030-A - APPARATUS FOR CHARGING COKE 0VEN

KR20260067030AKR 20260067030 AKR20260067030 AKR 20260067030AKR-20260067030-A

Abstract

The present disclosure provides a coke oven charging device. The coke oven charging device according to the present disclosure includes a storage hopper for storing raw coal and briquettes of different particle sizes, a mixing section for mixing the raw coal and briquettes, a discharge section for discharging the mixed coal discharged from the storage hopper into a coke oven, and a mixing promotion section for promoting the mixing of the raw coal and briquettes mixed by the mixing section.

Inventors

이운재
박지욱
라기호
이승재

Assignees

주식회사 포스코

Dates

Publication Date: 20260512
Application Date: 20241105

Claims (15)

A charging device installed on a charging car that supplies raw materials to a coke oven, A storage hopper installed on the above-mentioned charging car for storing powdered raw coal and molded coal with different average particle sizes together, A mixing unit provided at least one inside the storage hopper and for mixing the powder raw coal and the molded coal while moving them up and down, A discharge section provided at one end of the storage hopper and for discharging the mixed coal of the raw coal and the molded coal discharged from the storage hopper to the coke oven, and A mixing promoting unit installed in at least one of the above storage hopper and for promoting the mixing of the powder raw coal and the molded coal mixed by the above mixing unit. A coke oven charging device including
In paragraph 1, The above storage hopper has various shapes and is a coke oven charging device having an inclined surface in which the diameter or width gradually narrows from one end to the other end opposite the one end.
In paragraph 2, A coke oven charging device in which the above inclined surface is positioned at an angle with respect to the bottom surface of the above storage hopper.
In paragraph 2, The above mixing unit is, A shaft installed at set intervals inside the above storage hopper, A mixer screw installed along the circumference of the shaft and for mixing the raw coal powder and the molded coal when the shaft rotates, and A coke oven charging device including a drive motor for rotating the shaft, installed at one end of the mixer shaft.
In paragraph 4, The above shaft is a coke oven charging device positioned with respect to the above inclined surface.
In paragraph 1, A coke oven charging device having a dispersion plate installed inside the storage hopper to disperse the raw coal and molded coal stored in the storage hopper into the internal space of the storage hopper.
In paragraph 6, A coke oven charging device in which the above dispersion plate is formed such that its tip is located at the top.
In paragraph 1, The above discharge section is, A discharge port disposed at the other end of the storage hopper and for discharging a mixture of the powder raw coal and the molded coal, and A coke oven charging device including a discharge port control valve installed at the discharge port and for controlling the opening and closing of the discharge port.
In paragraph 8, A coke oven charging device, wherein the above discharge port control valve is a valve capable of discharging mixed coal from the above discharge port.
In paragraph 1, The above mixing promotion unit is installed in the storage hopper and includes a vibration device for vibrating the storage hopper to increase the mixing of the molded coal, which has a larger particle size than the powdered raw coal, with the powdered raw coal, in a coke oven charging device.
In Paragraph 10, The above vibration device is a coke oven charging device installed on the outer surface of the storage hopper.
In paragraph 1, A coke oven charging device in which the average particle size of the above raw coal is set to 10 mm or less, and the average particle size of the above molded coal is set to a range of 20 to 60 mm.
In Paragraph 12, A coke oven charging device in which the proportion of particles with a particle size of 3 mm or less among the above raw coal is set to 80 wt% or more.
In Paragraph 12, A coke oven charging device in which the weight ratio of the raw coal and the molded coal charged into the storage hopper is set to a range of 9:1 to 5:5.
In Paragraph 14, A coke oven charging device having a charging density of 800 kg/ m³ or more for a mixture of the above raw coal and the above molded coal.

Description

Coke Oven Charging Apparatus The present disclosure relates to a coke oven charging device. Coke used in blast furnaces to produce molten iron in the steelmaking process takes the form of lumps from which volatile components have been removed by carbonizing raw coal for a certain period under oxygen-free conditions in a high-temperature coke oven. It serves as a reducing agent to reduce iron ore in the blast furnace, a heat source to supply the heat required for reduction, and a ventilation agent to ensure the smooth passage of molten iron and hot air. At this time, the coke used as a reducing agent is typically manufactured using high-grade coking coal as a raw material; however, since the global reserves of such high-grade coking coal are limited and gradually depleted, coke is produced by mixing low-grade coking coal or non-coking coal with low coking properties with high-grade coking coal. When a blended raw coal mixture consisting of high-grade coking coal with a specific particle size range and low-grade coking/non-coking coal is charged into a coke oven by gravity, the compaction effect between coal particles is insufficient. Consequently, the charging density of the blended raw coal inside the oven is low, which reduces the pore wall thickness of the produced coke and lowers the structural density, or densification, making it difficult to manufacture high-strength coke. Therefore, in order to improve the charging density of raw coal charged into the coke oven and to close the gaps between coal particles, a technology has been developed and is being used to charge molded coal, processed from raw coal into a briquette shape of a predetermined size, into the coke oven. However, if all raw coal charged into the coke oven is manufactured into briquettes, time, energy, and equipment are required to process the raw coal, and the gaps between the briquettes become larger than necessary, which actually lowers the charging density and may degrade the quality of the produced coke. FIG. 1 is a schematic diagram of a coke oven charging device according to one embodiment of the present disclosure. FIG. 2 is a graph showing the change in charging density according to the addition ratio (wt%) of molded coal (A, B) in the coke oven apparatus of the present disclosure. FIG. 3 is a graph showing the change in cold strength of coke according to the change in charging density in the coke oven apparatus of the present disclosure. FIG. 4 is a graph showing the change in hot strength of coke according to the change in charging density in the coke oven apparatus of the present disclosure. Hereinafter, embodiments of the present invention are described with reference to the attached drawings so that those skilled in the art can easily implement the present invention. As will be easily understood by those skilled in the art, the embodiments described below may be modified in various forms without departing from the concept and scope of the present invention. Where possible, identical or similar parts are indicated using the same reference numerals in the drawings. The technical terms used below are for the reference of specific embodiments only and are not intended to limit the invention. The singular forms used herein include plural forms unless phrases clearly indicate otherwise. The meaning of "comprising" as used in the specification specifies a particular characteristic, area, integer, step, action, element, and/or component, and does not exclude the presence or addition of other particular characteristic, area, integer, step, action, element, component, and/or group. All terms used below, including technical and scientific terms, have the same meaning as generally understood by those skilled in the art to which the present invention pertains. Terms defined in advance are further interpreted to have meanings consistent with relevant technical literature and the present disclosure, and are not interpreted in an ideal or highly formal sense unless otherwise defined. FIG. 1 is a schematic diagram of a coke oven charging device according to one embodiment of the present disclosure. A coke oven charging device according to one embodiment of the present disclosure is a charging device additionally installed on a charging car (not shown) that supplies raw materials to a coke oven (not shown). Referring to FIG. 1, the coke oven charging device includes a storage hopper (100) for storing raw coal and molded coal with different average particle sizes together. The storage hopper (100) can be installed on a charging vehicle. In addition, the coke oven charging device is provided with at least one mixing section (200) inside the storage hopper (100) to mix raw coal and molded coal while moving them up and down (Y direction in FIG. 1). The coke oven charging device includes a discharge section (300) provided at one end of the storage hopper (100) for discharging a mixed coal, which is a mixture of raw coal and molded coal discharged