JPS6174757A - Continuous casting device - Google Patents

Abstract

PURPOSE:To provide a titled device which produces a good ingot with stability and prevents trouble such as breakout by supplying metallic chains along the stationary gates of two horizontal rolls in proximity to each other for continuous casting of the thin sheet to carry way downward the solidified material formed on the surface of the stationary gates. CONSTITUTION:The metallic chains 8 consisting of iron, etc. are supplied along the heated stationary gates 2 in contact with the side faces of the two horizontal water cooling rolls 1, 1' in proximity to each other under rotation in the directions opposite from each other and are discharged together with the ingot 3. The solidified material formed on the surfaces of the gates 2 is carried away downward and the good ingot 3 is stably produced without spoiling the ingot characteristic by the solidified material. The trouble such as breakout is prevented as well.

Description

[Detailed description of the invention] [Industrial field of the present invention] The present invention relates to a twin-drum continuous casting apparatus.

[Background technology]

A twin-drum continuous casting machine that continuously casts thin plates by pouring molten metal into the space created by two internal water-cooled drums and two fixed weirs pressed against the drum end faces solidifies the molten metal on the fixed weir walls. It is important to prevent this, or to treat it so that the solidified material solidified on the fixed weir wall does not interfere with casting. For this reason, the fixed weir wall is preheated to a high temperature before casting, but the temperature of the part pushed by the end of the drum drops, causing deformation of the fixed weir, and a complete seal between the drum and the fixed weir wall. Otherwise, it may cause the molten metal to leak, causing a breakout (molten metal leakage). In addition, solidified matter is formed in this area, and if this solidified matter adheres to and grows on the fixed weir wall surface, it not only significantly impairs the properties of the slab but also becomes a cause of breakout.

[Object of the present invention]

An object of the present invention is to provide a twin-drum type continuous casting device that prevents solidified material from adhering to the wall surface of a fixed weir, thereby preventing operational failures such as breakouts, and stably producing slabs with good properties. With the goal. Specifically, the present invention is capable of solidifying the solidified material produced on the fixed weir wall surface in contact with the end surface of the drum by integrating the solidified material with the solidified shell formed on the drum surface and carrying it away downward with the rotation of the roll. An object of the present invention is to provide a twin-drum type continuous casting device that prevents objects from sticking to a fixed weir wall surface.

[Configuration of the present invention]

The present invention, as a means for achieving the above object, consists in continuously supplying a chain to a fixed weir. That is, the present invention consists of two water-cooled drums that are arranged horizontally in parallel with a gap corresponding to the thickness of the metal strip to be manufactured, and that rotate in different directions.
This continuous casting apparatus is characterized in that a clean chain is continuously supplied to the fixed weirs in a continuous casting apparatus for pouring molten metal into the space formed by each fixed weir to obtain a thin plate.

The chain used in the present invention is one that can alleviate thermal deformation caused by molten steel and the like, and can be easily disposed on the end face of the drum. Specifically, for example, a metal chain made of iron is used. In the present invention, this chain is fed between the casting roll surface near the end of the drum and a fixed weir, and the chain is cast in synchronization with the casting roll. This metal chain is continuously fed during casting, and the solidified material generated on the fixed weir wall surface is carried away along the metal chain and downward together with the slab.

Hereinafter, the present invention will be explained in detail based on FIGS. 1 and 2. FIG. 1 is a longitudinal sectional view of a continuous casting apparatus according to an embodiment of the present invention, and FIG. 2 is a diagram schematically showing a portion where the water-cooled casting drum and fixed weir in FIG. 1 come into contact. The illustrated device is a device for casting thin plate slabs 6, including a water-cooled casting drum 1.1', a side fixed weir 2.2' for preventing leakage of molten metal 4 between the water-cooled casting drums 1 and 1', Molten metal such as molten steel 4
The main components include a tandish 5 for storing water, a metal chain 7, etc.

To explain this device in detail, the water-cooled casting drum 1.1'
is installed horizontally and is rotated (in the direction of the arrow) by a drive device (not shown). This water-cooled casting drum 1.1'
The drum is made of, for example, copper, a copper alloy, or a steel material, and has a built-in water cooling mechanism, and has a fairly large diameter drum in order to obtain a large contact area with the molten metal 4.

In addition, as shown in FIGS. 1 and 2, a water-cooled casting drum 1,
A metal chain 7 is attached to both ends of the chain supply pipe 8.
The two water-cooled casting rolls 1 are continuously supplied in synchronization with the water-cooled casting drums 1 and 1', and fixed weirs 2 and 2' made of refractory material for sealing the sides are pressed against the two water-cooled casting rolls 1. , 1' and the two fixed weirs 2, 2' are filled with molten metal 4. The poured molten metal 4 is cooled by contacting the surfaces of the water-cooled casting rolls 1 and 1', and the resulting solidified shell is integrated to form the slab 3. This slab 3 is pulled out by a vinyl roll 6. In the figure, 10 is a guide roll, and 11.11' is a piston rod of an air cylinder (not shown) that presses the fixed weirs 2, 2' against the roll 1.1'.

The action of the metal chain 70 will be explained based on FIG. 2.
, 2' wall surface decreases in temperature and a solidified substance is formed in this area, but due to the presence of the metal chain 7, the solidified shell formed on the drum 1.1' surface and the metal chain 7 and Since the solidified material is integrated and stably carried away downward in synchronization with the rotation of the casting roll, the solidified material does not stick and grow on the surfaces of the fixed weirs 2 and 2'. Note that the metal chain 7 has characteristics that can alleviate thermal deformation caused by the molten steel 5 and the like, and that it can be easily supplied to the end face of the drum.

Although the present invention has been described in detail above, the present invention will be explained in more detail by giving one specific example of the present invention.

〔Concrete example〕

The dimensions and various conditions of the component parts when steel is cast are as follows.

(1) Water-cooled cast drum Made of steel and internally water-cooled, drum diameter is 2.0 mm.
00■φ, roll width is 1.200 wφ, slab size is 5
arm x 1.2006 width, and the roll rotation speed (slab speed) is about 45 x/mln.

(2) Metal chain A marten chain made of iron and having a wire diameter of 1.2 m was used.

(3) Molten metal In the case of ordinary steel, the temperature of the molten metal in the tundish is 1,520
~1.560°C.

When casting was performed under the above conditions, good slabs could be stably obtained without any operational troubles such as breakouts.

[Effects of the present invention]

As described in detail above, the present invention is configured to continuously supply a chain to a fixed weir and to carry away the coagulated material generated on the wall surface of the fixed weir downward. This has the effect of stably casting good slabs without impairing the properties of the slabs. Further, there is an effect that stable casting can be performed without troubles such as breakouts.

[Brief explanation of drawings]

FIG. 1 is a vertical cross-sectional view of a continuous casting apparatus according to an embodiment of the present invention), and FIG. 2 is a diagram schematically showing the contact portion between the water-cooled casting drum and the fixed weir in FIG. 1. Sub-agents 1) Meifuku agent Ryo Hagiwara -

Claims (1)

[Claims] It is formed by two water-cooled drums that rotate in different directions, arranged horizontally with a gap corresponding to the thickness of the metal strip to be manufactured, and two fixed weirs pressed against the end faces of these drums. 1. A continuous casting device for obtaining a thin plate by pouring molten metal into a space in which a molten metal is poured, the continuous casting device being characterized in that a chain is continuously supplied along a fixed weir.