JPS6187813A - Ladle refining installation - Google Patents

Abstract

PURPOSE:To treat continuously a molten steel with good productivity by providing a ladle loading and unloading station, molten steel heater, degassing device, etc. in the circumferential direction of a toric closed loop and providing a central support which receives the load of each installation and apparatus to the center of the closed loop. CONSTITUTION:The ladle loading and unloading station 1, a slag discharging station 2, the molten steel heater 3, a KAT device 4 and a vacuum degassing device 5 are disposed apart from each other in the circumferential direction on the toric closed loop 8. The central support 15 made into a hollow columnar construction is erected and fixed to the center of the closed loop 8. Upper, middle and lower decks 13, 14, 12 which receive the load of each installation and apparatus are provided to the support 15 and are connected to a passage 20. Stirrers 9 which can freely advance and retreat to the inside and outside of the diametral direction are respectively provided to the lower deck 12 facing the heater 3 and the degassing device 5 in the inside direction of the diameter so that the molten steel in the ladle 7 imposed on the carriage 6 in the station 1 is stirred.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention provides a ladle for continuously refining a 9-meter steel taken out of a converter and placed in a ladle while moving the ladle. The present invention relates to refining equipment, and specifically relates to a support frame structure in a ladle refining equipment that moves the ladle mentioned above in a circular closed loop. , [Conventional technology] f! The steel bath extracted from the r-share converter is stored in a ladle, but as required, each machine is refined outside the furnace prior to casting. μ′ as a refining vc station
i! There are R types, but recently they have been stored in a ladle.
Powder additives for refining (for example, CaC1, Ca -
Si, etc.) -? Calcium injection equipment (commonly referred to as KAT) is used, which controls inclusions, desulfurizes, deoxidizes, etc. by injecting it with Arya gas (usually Ar). Furthermore, a 710 heat fc@ for heat retention or heating, or a degassing device for removing dissolved gas from the molten steel is also used.

Conventionally, these devices were provided independently, and if necessary, alloy fractions, etc. were added to each F independently. However, for example, the Ca alloy powder used in the KATli process is particularly important for the dehydrogenation of molten steel after rounding due to its hygroscopic properties, and the relevance of 'rrn et al. has attracted attention.

In other words, as mentioned above, AT people install the heating equipment, degassing equipment, etc. as independent equipment, and furthermore, they are separated from RT72.
It is pointed that is placed in place.

Therefore, these devices require a special round crane to transport the pots, and also! A crane or a moving ladle is also required between the equipment.

Furthermore, the processing steps differ depending on the type of steel and its purpose, and some require only passing through a heating device and a degassing device, while others require only passing through a heating device and a KAT civil equipment to complete a degassing device. Various steps are used, such as omitting the KAT, or directly transporting the KAT without passing it through a heating device, and then transporting it to a degassing device. The ladle conveyance line that connects the seven vessels must be constructed to accommodate these requirements. Since these various types of demolition equipment are directly installed separately, it is necessary to install an independent nine-alloy powder private equipment and/or concealed exhaust gas equipment. Expenses? Moreover, it is often inconvenient in terms of operation management and operation. -In recent years, the continuous casting method has been widely adopted in place of the Jintong ingot making method from the viewpoints of productivity, yield, energy saving, labor saving, etc. In order to achieve maximum performance, it is necessary to continuously prepare and supply molten steel of the desired quality to the continuous casting process. However, on the converter side, which is in the position of co-supplying n2, there is a difference between the blowing time and the quality of each steel for each charge, and the subsequent processing steps are also affected by this, and there are also changes in the steel type. There are many variations in quality, especially in the conventional equipment configuration mentioned above, which is controlled in the continuous casting process. [It often happens that it becomes difficult to efficiently supply the series α. Therefore, is it an advantage of continuous word a method? The current situation is that it is not fully utilized.

Based on this viewpoint, the applicant who refused the application
In Publication No. 20, a continuous steel processing device in which a ladle runs on a circular closed loop? This is something that has been proposed and is attracting attention.

[Problem that the invention seeks to solve]

By the way, in ladle refining equipment, what happens when the ladle is closed on a closed loop? ! ! It is necessary to move the molten steel to the processing line and stir it in the heating device and degassing device, but when installing the 7th "electromagnetic stirring 1i: IiC hereafter referred to as Starte 5), these loads can be stirred in a closed loop. Supporting the outer circumference increases the height of the equipment and is structurally difficult.In particular, it is impossible to support the inner surface of the closed loop without a support.

Therefore, in the present invention, the ladle car or ladle stand that runs and stores in a closed loop receives the load of each equipment at the center of the loop without causing any obstruction, and the installation of the valley equipment can be easily closed. The purpose is to provide the following.

[The tth way to solve the problem]

The technical measures taken by the present invention to achieve the stated purpose are that the ladle-battlefield, the 7111 heat sink and degassing station for heating the molten steel in the ladle are circular and circumferential on the rLm closed loop. The pots were placed at intervals of
A ladle for storing the L-9 steel, and a ladle loading platform for storing the heating device and the degassing device in a closed loop are provided.
In the ladle refining equipment, the central vc of the closed loop is !
r A central support that receives the load of the equipment is erected and fixed on the foundation, and a L7t deck is housed in the upper, middle and lower cells of the central support and extended horizontally.
A passageway connecting each of the above-mentioned decks is provided in the mJ central branch, and a stirrer that can move forward and backward is installed on the lower deck of the n1 song. .

[Operation] When the ladle is unloaded from the converter at the ladle unloading station in the closed loop, and the ladle is unloaded onto the loading platform or the metal ball, the ladle is discharged from the slag on the closed loop. A heating VC station, a degassing device, a KAT reading device, etc. are arranged at intervals in the circumferential direction. In the line or in the processing section, some processing steps are carried out.

In this case, the load of each piece of equipment is carried by the NL central support that is erected and fixed at the center of the closed loop, and the upper deck of the central support serves as a support frame for each processing VC, and also for the storage area. It will be used for storage and operation such as powder storage for injection, lance storage, etc.

Furthermore, f/1. A stirrer is installed on the industrial deck and box, and on the lower deck of the central support, to prevent V in the ladle during heating or degassing.
) Stir the stone tone.

A passage provided in the central support between the valley decks! l
-f'F, is there one thing about Toin passing through?' ! r Work will be communicated and coordinated.

[Implementation row]

Embodiments of the invention will be described in detail with reference to the following.

Referring to Figures 1 to 3, (1) μ pot surrender field, +
21μ protector evacuation and slag disposal site, 13J i Arc
The heating device 41 μKAT private device (6) is heated by a vacuum degassing device and placed on the annular closed loop (8) at a predetermined interval t in the circumferential direction.

(6) is a script or pot loading platform (hereinafter referred to as a trolley),
It resides in an annular shape on the closed loop 181 and cannot be moved independently.In this example, there are two frames, but the number of frames can be set arbitrarily. , take out the molten steel r′L from the converter and put it into
6) Issued above.

116) μ central support, which is erected and fixed on the base a at the center of the closed loop (8) via a pedestal acat.

There is an upper deck on α4, an upper deck on α41μ, and a lower deck on lI4, and each deck has a bomb extending horizontally from the central support σ.

It has a centrally supported pillar structure, with a passageway indicated by stairs, ladders, etc. inside the 7th floor, and the passageway 2 [IK] is connected to the entrance/exit row leading to the 5th deck.

It should be noted that even if the helical staircase shown in FIG. On the inside, a stirrer is installed on the corresponding lower deck opening so that it can move forward and backward in and out of the direction of the kettle. The stirrer (9) mentioned above can be freely moved forward and backward in and out of the direction of the container.

With the 9μ positioning cylinder, the above-mentioned stirrer storage stand (lO
) is installed vertically on the back of the stirrer (9).
F: t'L to t'L can be positioned between the forward position and the reverse position.

That is, a stopper is attached to the piston of the cylinder, and a stopper is drilled in all decks 112+ of the cylinder, and a 7t receiving hole e2s is inserted.
': It is possible for Starrer (9) to leave the house by contriving to disengage from A.

In addition, the power supply cable to the stirrer T91 has a flexible part (27A) in the above-mentioned advance and retreat 1, and a storage platform (
The buds can be freely heated through the °C stirrer (9).

It is a 281μ pot with a rigid and civil construction, and is installed as a telescopic type in the radial inward direction corresponding to the slag removal area and 2) on the lower deck lift. It is attached to the pot T-bin β11 and is inserted into the tube 1301, and a hook is provided at the end of the rod. 17A) is pushed downwards and upwards.

In addition, the lower part of the outer periphery of the pot is tilted with a pin (to).
6), and therefore, when the ladle #41Fl is extended, the ladle (71 is an uncuttable 〇1μ slag ladle, a ladle, which cannot be cut as shown in Fig. Seven hidden slag scrapers are shown, and slag removal site 1
2) are provided corresponding to the outer peripheral area.

The device is attached to the pedestal α9 via the rotating arm plan on the mortar (6).
Closed loop + via motor, gear transmission system, etc.
81 upper t1e first incapacity.

In addition, the trolley (9) is not supported by the rotating arm (vc).
, closed loop 121).

μs), a heating device (3) and a degassing device 16
), etc., the pot (7) is covered at the discretion of the adoptive parent and can be raised and lowered.

Historically, upper deck α3, middle deck α4, and lower deck 1J21u pillars not shown in the diagram? They are connected to each other through a so-called unit structure, and on one side of this unit structure is an operation room as shown in FIG. 4CA,) Reims Tomien is provided.

The upper deck α4 is the electrode storage area (6) shown in Figure 1.
, Powder storage area for injection - In addition to being used as a storage area for 4th-grade tanicho attachments, a heating device of 131% KATmin [114
It is used as an operational deck for 1% degassing fc @ tel's Valley A processing equipment, replenishment of mounts and utility poles, replacement of injection lances, temperature measurement sampling work, etc.

For maintenance work such as replacement work, confirmation of brick condition, etc.

It is assumed that the stirrer (9) etc. will not be attached to the lower deck, and that the load will be carried by the central column. In addition, in Figure 1, ! A 441μ heat retention cost removal device and a decoy are formed in the middle deck α of the slag dumping area and have nine incisions.

〔Effect of the invention〕

The non-invention is that a heating device for heating a stone pot in a hotpot, a heating device for heating a stone pot in a hotpot, and a degassing device are arranged at intervals in the circumferential direction on a circular ring-shaped closed loop. When the ladle was delivered to the battlefield, a trolley or loading device was installed to move the ladle containing the stone ladle to the heating device and the degassing device in a closed loop. Basic action and effect?

■ The processing process can be performed continuously, improving productivity.

■ The interval between valley processing stages can be shortened, making the running lane uncomfortable, reducing processing time and increasing production.

■ ′? ! Since the processing devices are located close to each other, it is easy to centrally manage operations.

■ Auxiliary equipment can be centrally installed and shared, reducing equipment costs.

■ The installation floor space is small and it can be installed on Sumikuma rL7'F-site.

■ You can freely combine t processes according to the target quality.

Nine, in the present invention, is the load of each equipment at the center of the closed loop? A receiving central support is erected and fixed on the foundation, and horizontally extending decks are attached to each of the upper, middle and lower tiers of the central support; A passage connecting the decks is provided in the central support, and a stirrer that can freely move forward and backward in the radial direction is provided on the lower deck, so that the following unique effects are achieved.

- During heat treatment and degassing treatment, the bath steel in the ladle can be reliably stirred using a stirrer.

■ For a ladle car or ladle set that starts traveling in a closed loop, it is possible to receive each installation S load at the center of the loop without causing any obstruction, and to facilitate the installation of each of the above equipment equipment.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, and Fig. 1 is a schematic plan view of the equipment, Fig. 2 is a schematic plan view of the lower deck section, Fig. 3 is an elevational side view of the equipment, and Fig. 4 is the same direction. η1 911
Figure 111 is a side view, Figure 5 is a side view showing the μ pan stubborn part, and Figure @6 is a side view of the t pan #IvJ part showing another example of stairs. (1)...M surrender field, (31...heating device, (6n...Yue gas device, (6)...Usuho, ())...@
Pot, (8)...closed loop, α4α3α4...deck, 11su...center support, edge...passage. Patent Applicant: Kobe Steel, Ltd. 2i,-Sen,・7 Figure 4U 47 Figure 4

Claims (1)

[Claims] 1. A ladle unloading station, a heating device for heating molten steel in a ladle, and a degassing device are arranged at intervals in the circumferential direction on an annular closed loop; A ladle refining facility equipped with a truck or a ladle loading platform for moving the molten steel storage ladle carried into the unloading area to the heating device and the degassing device in a closed loop, the ladle refining facility being equipped with a truck or a ladle loading platform that moves the molten steel storage ladle carried into the unloading area to the heating device and the degassing device in a closed loop, wherein each device is installed in the center of the closed loop. A central support that receives the load of the equipment is erected and fixed on the foundation, and horizontally extending decks are attached to each of the upper, middle, and lower tiers of the central support; A ladle refining equipment characterized in that a communicating passage is provided in the central support, and a stirrer that is movable radially inwardly and outwardly is provided on the lower deck.