KR-20260066901-A - STEEL MAKING APPARATUS AND OPERATING METHOD THEREOF

KR20260066901AKR 20260066901 AKR20260066901 AKR 20260066901AKR-20260066901-A

Abstract

The present invention provides a steelmaking facility capable of stably supplying raw materials and a method for operating the steelmaking facility applicable thereto, comprising: a processing furnace capable of melting raw materials; a supply unit extending in one direction to supply raw materials to the processing furnace and connected to the processing furnace; a delivery unit disposed on the supply unit to receive raw materials and discharge the received raw materials to the supply unit; and a crushing unit installed on the delivery unit to crush the raw materials of the delivery unit.

Inventors

강용훈
최상건

Assignees

주식회사 포스코

Dates

Publication Date: 20260512
Application Date: 20241105

Claims (18)

By a process capable of dissolving raw materials; A supply unit that extends in one direction and is connected to the processing furnace so as to supply the above raw material to the processing furnace; A delivery unit disposed on the supply unit to receive the above raw material and discharge the received raw material to the supply unit; and A steelmaking facility comprising: a crushing unit installed in the delivery unit to crush the raw material of the delivery unit.
In claim 1, The above-mentioned transmission unit is provided in multiple numbers and is arranged sequentially in the above-mentioned one direction, and The above crushing unit is provided in at least one or more units, and the steelmaking facility is installed in at least one of the plurality of conveying units.
In claim 2, A steelmaking facility comprising: an input section disposed on a plurality of delivery sections to allow the raw material to be selected and fed into a delivery section equipped with a crushing section and a delivery section not equipped with a crushing section among the plurality of delivery sections according to the type of raw material.
In claim 2 or claim 3, The crushing unit is a steelmaking facility installed in the transfer unit closest to the processing furnace among the plurality of transfer units.
In claim 2 or claim 3, The plurality of delivery units include a crushing delivery unit in which the crushing unit is installed and a non-crushing delivery unit in which the crushing unit is not installed. A steelmaking facility having more non-crushing delivery sections than crushing delivery sections.
In claim 5, A steelmaking facility in which the number of the above-mentioned non-crushing delivery units is 3 to 5 times the number of the above-mentioned crushing delivery units.
In any one of claims 1 to 3, The above-mentioned transmission unit is, A hopper having a receiving space and with the top and bottom open; and A steelmaking facility comprising: a switch installed to open and close the lower part of the hopper.
In claim 7, The above crushing unit is positioned to cross the receiving space of the hopper and is rotatably supported on the inner wall of the hopper.
In claim 8, The above crushing unit is, A crushing shaft installed on the inner wall of the above-mentioned hopper; A plurality of first crushing members spaced apart in the direction in which the crushing shaft is extended and mounted on the outer surface of the crushing shaft; and A steelmaking facility comprising a plurality of second crushing members installed on the inner wall of the hopper so as to engage or be offset from a plurality of first crushing members.
In claim 3, The above input section is, A device capable of obtaining information on the type of the above-mentioned raw material; An injector movably disposed on the plurality of delivery units so as to be able to input a desired type of raw material among the raw materials into a desired delivery unit among the plurality of delivery units; A steelmaking facility comprising a controller for receiving information from the above-mentioned acquirer and controlling the operation of the above-mentioned feeder.
In claim 10, A steelmaking facility that controls the operation of the feeder such that if the raw material is a compressed raw material, the controller can feed the compressed raw material into the delivery unit among the plurality of delivery units where the crushing unit is installed or into the plurality of delivery units, and if the raw material is an uncompressed raw material, the controller can feed the uncompressed raw material into the delivery unit among the plurality of delivery units where the crushing unit is not installed.
The process of preparing raw materials; A process of introducing raw materials into a delivery unit having a receiving space; A process of crushing at least a portion of the raw material of the above-mentioned delivery unit; A process of supplying raw materials including crushed raw materials to a supply section extending in one direction; and A method for operating a steelmaking facility including the process of charging raw materials from the above-mentioned supply unit into a processing furnace.
In claim 12, The process of adding the above raw materials is, The process of distributing the above raw materials; and A method for operating a steelmaking facility comprising: a process of introducing raw materials distributed to each of a plurality of delivery units sequentially located in the above-mentioned direction from the upper side of the supply unit.
In claim 13, The process of distributing the above raw materials is, A process of classifying the types of the above raw materials into two based on size distribution; and A method for operating a steelmaking facility including a process of distributing the above raw materials according to the classified types.
In claim 14, The process of classifying the above raw materials into two types is, A method for operating a steelmaking facility comprising the process of classifying the above raw materials into compressed raw materials of a constant size and non-compressed raw materials of a non-constant size.
In claim 15, The process of introducing raw materials distributed to each of the aforementioned plurality of delivery units is, A process of introducing the compressed raw material into the delivery unit closest to the processing furnace in one direction among the plurality of delivery units, or into the plurality of delivery units; and A method for operating a steelmaking facility comprising: a process of introducing the non-compressible raw material into the remaining delivery sections among the plurality of delivery sections, excluding the delivery section closest to the processing furnace in one direction.
In any one of claims 13 to 16, The process of crushing at least a portion of the raw material of the above-mentioned delivery unit is, A process of crushing the raw material of the delivery unit closest to the processing furnace in one direction among the plurality of delivery units; A method for operating a steelmaking facility comprising: a process of not crushing the raw materials in the remaining delivery sections, excluding the delivery section closest to the processing furnace in one direction among the plurality of delivery sections.
In any one of claims 12 to 16, The process of supplying raw materials including crushed raw materials to the above-mentioned supply unit is, A process of loading raw materials including crushed raw materials into the supply unit so that the crushed raw materials are loaded on top; and A method for operating a steelmaking facility comprising: a process of moving raw materials including crushed raw materials along a supply section while maintaining a state in which crushed raw materials are loaded on the upper part.

Description

Steelmaking Apparatus and Method of Operating the Steelmaking Apparatus The present invention relates to a steelmaking facility and a method for operating a steelmaking facility, and more specifically, to a steelmaking facility and a method for operating a steelmaking facility capable of stably supplying raw materials. Molten steel is produced using either the blast furnace-converter method or the electric furnace method. Of these, the majority of molten steel is produced using the blast furnace-converter method. However, the blast furnace-converter method generates a large amount of carbon dioxide during the manufacturing process, making it a major cause of climate change, such as global warming. In contrast, the electric furnace method produces less carbon dioxide than the blast furnace-converter method. Furthermore, the electric furnace method enables resource recycling when iron scrap is supplied as an iron source, and allows for carbon neutrality when electricity is supplied using renewable energy. In response to climate change, research on carbon-neutral technologies is actively underway. Accordingly, research is actively being conducted to manufacture large quantities of molten steel using the electric furnace method to replace the blast furnace-converter method. However, iron scrap used to manufacture molten steel in an electric furnace has diverse shapes and significant variations in size. Therefore, when supplying iron scrap into the interior of the electric furnace through a charging port formed on the side of the furnace, and when preheating the scrap using a preheating device on the supply port while moving the scrap to the charging port using a supply device connected to the port, an accident may occur where the scrap gets stuck in the preheating device. Furthermore, when feeding iron scrap into the supply device using an input device, even if the scrap is fed at the same height, differences in shape and size among the scraps can cause them to entangle and the spacing between them to vary. Consequently, the weight of the scrap being charged from the supply device into the electric furnace may fluctuate continuously even though the height remains the same. Alternatively, the height of the scrap being charged from the supply device into the electric furnace may fluctuate continuously even though the weight remains the same. In this case, if the weight of the scrap being charged into the electric furnace decreases, the temperature inside the electric furnace may rise rapidly. Furthermore, if the height of the iron scrap charged into the electric furnace increases, the scrap may get stuck in the charging port. Consequently, there is a problem in that the operator must intervene in the operation of the input device based on subjective judgment. The technology forming the background of the present invention is disclosed in the following patent documents. FIG. 1 is a schematic diagram showing a steelmaking facility according to an embodiment of the present invention. FIG. 2 is a schematic diagram showing a delivery unit equipped with a crushing unit according to an embodiment of the present invention. FIG. 3 is a schematic diagram showing a delivery unit without a crushing unit installed according to an embodiment of the present invention. FIG. 4 is a schematic diagram showing a crushing section according to an embodiment of the present invention. FIG. 5 is a flowchart for explaining a method of operating a steelmaking facility according to an embodiment of the present invention. Hereinafter, embodiments of the present invention will be described in detail with reference to the attached drawings. However, the present invention is not limited to the embodiments disclosed below and may be implemented in various different forms. The embodiments of the present invention are provided merely to ensure that the disclosure of the present invention is complete and to fully inform those skilled in the art of the scope of the invention. To illustrate the embodiments of the present invention, the drawings may be exaggerated, and like reference numerals in the drawings refer to like elements. The present invention relates to steelmaking equipment and a method for operating steelmaking equipment. Below, an embodiment is described by exemplifying its application to a scrap continuous charging type electric furnace. Of course, the steelmaking equipment and the method for operating steelmaking equipment according to the embodiment of the present invention can be widely applied to equipment related to supplying raw materials to a processing furnace via a supply unit. That is, if the equipment has a supply unit that moves raw materials and a processing furnace that receives raw materials from the supply unit, the contents of the embodiment of the steelmaking equipment and the method for operating steelmaking equipment described below may be applied similarly or identically. Meanwhile, the steelmaking facility and the m