JPS5919562Y2 - Molten steel bubbling device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a device that performs bubbling treatment to adjust the temperature of molten steel in a ladle.

Adjusting the temperature of the molten steel in the ladle as a pre-process of ingot making and continuous casting is an extremely important technology as it affects the quality of the ingot (especially for continuous casting) in relation to the casting temperature. Various types of bubbling devices have already been used as a means of temperature adjustment, in which inert gas is blown into the molten steel in a ladle using a lance-shaped pipe to stir the molten steel and homogenize the temperature or components. It is also known that it has been proposed.

However, conventional bubbling devices are fixedly installed at a predetermined position in a steel factory, for example, and the ladle that receives the molten steel from the converter is moved to the predetermined bubbling device installation location using a ladle crane or the like. While the ladle is temporarily placed in that position, bubbling treatment and a series of adjustment operations are performed, and the ladle that has been treated is re-assembled and transported to the next process location such as an ingot yard or continuous casting yard using a one-dol crane. The most common method is

In this method, the bubbling treatment equipment itself is fixedly fixed in a specific location, so if steel is tapped from multiple converters at the same time, it is not possible to perform bubbling treatment on these multiple ladles. It is difficult to move the ladle, and it also requires a considerable amount of work space.

The present invention solves these problems and enables bubbling of multiple ladles to be performed quickly, easily, and flexibly even in a relatively narrow factory space. By directly moving the bubbling cart containing the bubbling device to the ladle tapping side of the furnace installation building, the ladle that received the tapped steel is still on the moving cart immediately after tapping from each furnace. The bubbling process can be carried out continuously using a single and unique bubbling device common to each furnace, without the need to move the ladle in any way. In order to carry out bubbling treatment for adjustment, each truck is provided with a ladle for receiving the molten steel placed below the furnace that accommodates the molten steel and moves it to the tapping side, and the operation schedule is adjusted accordingly. is movably equipped with a bubbling trolley that can pass over each trolley sequentially in a direction perpendicular to the moving direction of each of the trolleys, and a bubbling lance, a temperature measuring lance, and an inert gas pipe are mounted on the trolley. A bubbling working member such as the above is provided together with the necessary driving means.

The present invention will be described in detail below based on the illustrated embodiments. Fig. 1 is a conceptual diagram showing a layout when a bubbling device according to the present invention is implemented in a steelmaking factory using a converter,
In the figure, 1 is a mixed pig iron furnace, 2 is a converter, and A1-A
3 indicates a plurality of pieces, 5 indicates an ingot making yard, and 6 indicates a continuous casting yard. A ladle 4 on a steel receiving cart 3 which is movably arranged to the tapping side via the
They are housed in the respective steel receiving carts 3 and moved to the ingot making yard 5 or the continuous casting yard 6 by the ladle crane 7. At this time, the steel receiving carts 3 are placed in A bubbling trolley 8 that can pass sequentially over the pot 4 is provided movably via a traveling rail 9 or the like,
As will be described later, all the necessary members for the bubbling process are arranged on the bubbling cart 8, together with the necessary driving means for these members. On the other hand, the traveling lines XX of the bubbling cart 8 are parallel to each other.

In this way, the ladle 4 on the steel receiving cart 3 that receives the molten steel tapped from the furnace 2 is moved from the lower part of the existing furnace 2 to the tapping side by the same truck 4, and is also used for bubbling. Each of the trolleys 8 is stopped at an appropriate position on the running line XX, and the bubbling trolley 8 is run on the running line XX and stopped on each ladle 4. By using the members and their drives, the bubbling process can be sequentially performed using this one bubbling cart 8, and the ladle 4 that has undergone the bubbling process in this way is transferred to the ladle cleaner 7.
As is clear from this layout, there is no need to move each ladle 4 relative to the bubbling device, and the ladle 4 can be moved to the target ingot making yard 5 or continuous casting yard 6 by By moving one bubbling trolley 8, continuous bubbling treatment for a plurality of cylindrical ladles 4 can be performed extremely efficiently and easily without expanding the factory space or complicating operations.

The layout diagram shown in FIG. 1 is more concretely shown in FIGS.
The figure shows a plan view, a front view, and a side view in order, but as is further understood in these countries, the molten steel tapped from each converter 2 is transferred to a steel receiver installed below each converter 2. Trolley 3
The steel receiving cart 3 is received separately into the upper ladle 4, and the steel receiving cart 3 is moved on the traveling rail 10 from the point A below the furnace 2, as shown in FIGS. 2 and 4. The machine then moves to a predetermined point B on the tapping side and stops there.

At this time, as described above, the running rail 9 of the bubbling cart 8 is provided along the running line XX parallel to the converter line O-O on the tapping side, and in a direction perpendicular to the moving direction of the steel receiving cart 3. Since the bubbling trolley 8 is movably disposed at the bubbling trolley 8, the trolley 8 is initially waiting at the lance attachment/detachment deck 11 position shown in the second figure, and from this waiting position, the trolley 8 moves on the rails 9. Thus, each steel receiving cart 3 stops at the stopping point B.

For example, in the case shown in the figure, if there are three furnaces 2 as shown in FIG. lower it,
The ladle 4 is inserted immersed into the ladle 4, and an inert gas is blown into the ladle 4 to perform a bubbling process for stirring.The lance 12 is then raised, and the temperature measuring lance is then lowered to measure the temperature of the molten steel after the bubbling process. If necessary for temperature adjustment, coolant is introduced into the ladle from the injection chute 13,
When the temperature adjustment is completed in this way, the trolley 8 either returns to the original ladle 11 or moves to the next location B-2 and B-3, applies the same treatment to each ladle 4 next to each other, and then The ladle 4 that has been subjected to the bubbling process in this way is moved by each steel receiving cart 3 to the point C in FIG. It will be transferred to a continuous casting yard 6 or the like, and in the illustrated example, reference numeral 14 indicates an operating deck.

As described above, the present invention can perform bubbling treatment on a large number of ladles 4 much more easily than conventional methods, continuously and efficiently, and can also be carried out without any problems even in a steel factory with a narrow space. It is extremely advantageous and excellent in that respect.

That is, in the present invention, on the tapping line from the furnace body of a converter or the like for molten steel that requires bubbling treatment, a ladle 4 is placed below the furnace to receive the molten steel in the furnace. Steel receiving carts 3 for moving the steel to the tapping side are arranged separately, and a bubbling cart 8 having a movement line orthogonal to the moving direction of these tapping carts 3 and capable of passing and stopping over each of these ladles 4 is provided. The cart 8 is movably arranged, and each member necessary for the bubbling process, such as a bubbling lance 12, a temperature measuring lance, and an inert gas supply hose, is integrated with the necessary drive mechanism. Moreover, by using a comprehensive arrangement device, it is possible to perform bubbling treatment on the ladle 4 one after another by simply stopping the ladle 4 at a fixed point using one bubbling cart 8. Since the space is only for the straight movement of the trolley 8, it does not require a large space, and the space on the operating deck can be used effectively.Furthermore, there is no need for particularly complicated handling, and all necessary movements are performed by the trolley 8. This is an extremely excellent device for bubbling molten steel, as the device itself can be designed compactly, improving efficiency and contributing to labor savings compared to conventional methods.

[Brief explanation of drawings]

Fig. 1 is an implementation layout diagram of one example of the device of the present invention in a steelmaking factory, and Fig. 2. 3. FIG. 4 is a plan, front, and side view of a specific embodiment of the device. 1... Mixed pig iron furnace, 2... Converter, 3... Steel receiving cart, 4
... Ladle, 5... Ingot making yard, 6... Continuous casting yard, 7... Doll crane, 8... Bubbling trolley, 12... Bubbling lance.

Claims (1)

[Scope of utility model registration request] Each truck is provided with a ladle for receiving the molten steel placed below the furnace that accommodates the molten steel and moves it to the tapping side, and the operation deck is provided with a direction orthogonal to the moving direction of each of the trucks. A movable bubbling trolley that can pass over each nigatsu trolley in turn is provided, and bubbling work members such as a bubbling lance, a surveying lance, and an inert gas pipe are arranged on the trolley together with necessary driving means. A molten steel bubbling device characterized by: