JPH05311224A - Converter steelmaking works - Google Patents

Abstract

PURPOSE:To shorten carrying course and operation time and to facilitate automation of the carrying and charging of molten steel by parallel arranging tilting shafts of a pre-treatment refining converter and a finish refining converter so as to be mutually faced and arranging a molten steel carrying device between both converters. CONSTITUTION:The tilting shafts of the first converter 1 and the second converter 3 are parallel arranged so as to be mutually faced and a ladle 10 as the carrying device for the molten steel is arranged between the converters 1, 3. After filling the molten iron or the molten steel tapped from the converter 1 into the ladle 10, the ladle is lifted to the height near the furnace hole of the converter 3 by a carriage 5. Successively, a rack type tilting shell 13 holding the ladle 10 is tilted by a cylinder 12 for tilting and the molten iron or the molten steel is charged into the converter 3. A lifting carriage 5 is lifted on rails 15 by a wire 19 and the wire 19 is wound by a wire drum 17 and a motor reduction gears 18 through a sheave 16.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention is applicable to the case where hot metal pretreatment, smelting reduction and the like are carried out in a converter type first furnace, and final refining such as decarburization is carried out in another converter type second furnace. The present invention relates to a converter steelmaking plant having a suitable layout.

[0002]

2. Description of the Related Art In a conventional steelmaking plant in which two or three converters are installed, converters 1 and 3 are arranged in parallel as shown in FIGS. The tilting direction for hot metal charging or tapping is at right angles to the row of converters. That is, the trunnion axis XX ′ of the first converter 1 and the trunnion axis YY ′ of the second converter 3 are not opposed to each other and are on the same line.
With this arrangement, the converter operation is as follows: hot metal charging → blowing → tapping steel
Appropriate when completed with the original converter.

However, first, in the first converter 1, a pretreatment such as de-Ping, de-S and de-Si of the hot metal and a melt reduction of oxides such as ores are carried out, and the second converter 3 is provided separately. It is not a rational arrangement in the process of final refining of charcoal. That is, it is necessary to transfer the ladle 10 that has once received the pre-treated pig iron to another yard, lift it with the crane 7 and load it into the second converter 3. This method requires a crane, has a long path for ladle transportation by a crane, and has a 90 ° direction change. Therefore, it takes a long time for transportation and is industrially unfavorable in terms of productivity and temperature drop. In addition, it is difficult to automate ladle transportation.

[0004]

SUMMARY OF THE INVENTION The first object of the present invention is to:
By proposing a steelmaking plant with a layout of converters that shortens the ladle transportation route that connects the converter and the second converter, shortens the operation, and facilitates the automation of the transportation and charging of hot water. is there.

[0005]

The present invention comprises a pretreatment refining converter for performing hot metal pretreatment and smelting reduction of oxides such as ores, and a finishing refining converter for refining the hot water treated in this converter. In a steel factory having, the tilting axis of the pretreatment smelting converter and the tilting axis of the finishing smelting converter are arranged parallel to each other, and the tilting axis of the pretreatment smelting converter A converter steelmaking plant characterized in that a transport charging device for transporting and charging hot water into the finishing smelting converter is provided.

[0006]

In the present invention, the tilting shafts of the pretreatment smelting converter and the finishing smelting converter are arranged in parallel with each other so as to face each other, and the space between them is connected by the hot water carrying device, so that the carrying device can operate within a range. , It is possible to bring the converters as close to each other as possible. In addition, since the transport device can be connected from the hot water receiving position to the hot water discharging position in a substantially linear path, the first converter to the second
The delivery of hot water to the converter can be automated relatively easily.

[0007]

1 is a side view of a converter arrangement according to an embodiment of the present invention, and FIG. 2 is a plan view thereof. The tilting axis of the first converter 1 is XX ', the tilting axis of the second converter 3 is YY', and the tilting axes of the first converter 1 and the second converter 3 are arranged parallel to each other. A ladle 10 which is a device is provided.

After the hot metal or steel tapped from the first converter 1 is filled in the ladle 10, it is raised by the carriage 5 to a height near the furnace opening of the second converter 3. After that, the rack type tilting shell 13 holding the ladle 10 is tilted by the tilting cylinder 12 and the hot metal or the molten steel is charged into the second converter 3.
The lift truck 5 is lifted and lowered by a wire 19 on a rail 15, and the wire 19 is wound by a wire drum 17 and a motor speed reducer 18 via a sheave 16.

In the case of automating the operation of moving hot water in this embodiment, first, a signal for the completion of tapping of the first converter and completion of tapping is artificially input. Next, the dolly 5 that has received the hot water is automatically raised, and after reaching the uppermost position, it is automatically stopped by the limit switch. After that, the second converter 3 automatically tilts to the charging possible angle (set in advance). After that, the ladle is tilted with the tilting speed set by the tilting cylinder 12. With the tilting of the ladle 10, the converter 3 is also tilted in conjunction with it. The tilting speed and relative angle of the ladle and converter can be programmed in advance. From the above, unattended operation can be easily performed from the completion of tapping to the completion of charging. In this example, the ladle 10 is placed on the lift truck 5, but it is within the scope of the present invention to carry and load the ladle 10 by other means such as a crane.

[0010]

The hot metal pretreated by the above-mentioned converter arrangement and ladle transfer charging device takes about 1 / the required time as compared with the conventional method.
It can be shortened to 2 and charged from the first converter to the second converter, and can be fully automated.

[Brief description of drawings]

FIG. 1 is a side view of a converter layout of the present invention.

FIG. 2 is a plan view of a converter layout of the present invention.

FIG. 3 is a plan view of a conventional converter layout.

FIG. 4 is a view on arrow AA ′ of FIG.

FIG. 5 is an explanatory view showing a hot metal charging state by a crane.

[Explanation of symbols]

 1 1st converter 2 Steel tapping and tapping of the 1st converter 3 2nd converter 4 Steel taping and tapping of the 2nd converter 5 Bogie 6 Raw material yard 7 Hot metal charging crane 9 Bogie track 10 Ladle 11 Hydraulic generator for tilting cylinder 12 Tilt cylinder 13 Ladle tilting machine 14 Ladle lift truck 15 Ladle truck rail 16 Sheave for raising and lowering truck 17 Wire drum 18 Motor reducer 19 Wire

Claims (1)

[Claims] 1. A steelmaking plant having a pretreatment refining converter for performing hot metal pretreatment, smelting reduction of oxides such as ores, and a finishing refining converter for refining the hot water treated in this converter. The tilting axis of the refining converter and the tilting axis of the finishing refining converter are arranged parallel to each other, and the hot water from the pretreatment refining converter is placed between the two converters to the finishing refining converter. A converter steelmaking plant, which is equipped with a transportation and charging device for transportation and charging.