JPH04305345A - Single belt system continuous casting equipment - Google Patents

Abstract

PURPOSE:To keep a metal sheet of high quality by providing a molten metal pouring device arranged above a well formed with the endless belt and the connected fire resistant block group, an endless belt cooling device arranged below the above endless belt and the billet pulling out device. CONSTITUTION:An endless belt 4 which bridges with the curvature of a radius of curvature R and plural fire resisting blocks 5 formed along this above curvature are mounted on the both end surfaces of the endless belt 4, between the pulleys 2 arranged almost horizontal position. The connected fire resistant block group composed so as to move synchronously to this endless belt, and the molten metal pouring device arranged to the upward side of the well 9 composed of the endless belt and the connected fire resistant block group are provided. A endless belt cooling device 6 arranged on the downward side of the endless belt and a metal sheet pulling out device which pulls out the solidfied shell formed on the above endless belt are installed. Therefore, the rear side dam can be omitted, the metal sheet of high quality can be kept, and the change of the width of casting billet can be executed easily, so the effect on the operation is also large.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a single-belt continuous casting apparatus for continuously casting thin steel sheets, for example.

0002

2. Description of the Related Art In recent years, casting methods for continuously manufacturing thin plates from molten metal such as molten steel have attracted attention. This is due to the fact that there is no need for multi-step rolling or other treatments as in the past, and the process and equipment can be simplified. One method for this is the single-belt method.

In this single-belt method, for example, a pool is formed on a flat plate of an inclined endless belt, and the molten metal poured there is cooled and solidified by removing heat through the belt. A thin metal plate is produced by pulling out the solidified shell from the pool by running a belt (see Japanese Patent Laid-Open No. 156554/1983).

In this method, a rear weir is provided to stabilize the trailing end of the molten metal flow on the endless belt, but the solidified structure cooled and solidified by this rear weir remains as a heterogeneous structure within the slab. This may cause peeling during rolling.
Furthermore, it was difficult to change the width of the slab.

[0005] In order to eliminate this rear weir and perform stable casting, the present inventors disclosed Japanese Patent Application Laid-Open No. 61-82952.
In the publication, we proposed a continuous casting device using a circular ring as a side weir.

FIG. 4 shows one aspect thereof. In the figure, the belt 4 is stretched between the pulleys 2, 2 in close contact with the lower arc portion of the circular ring 16, and the belt and the circular ring are moved synchronously. The molten steel injected from the injection device 10 is pooled in the sump 9, and the belt 4 cooled by the cooling device 6 forms a solidified shell 11, which is drawn out of the system as the belt moves.

Therefore, in this device, the circular ring becomes a large piece of equipment, and in particular, if the distance between the pulleys is increased to increase the size of the pool, an extremely large circular ring is required, which increases equipment costs and maintenance costs. There were problems with growth.

[0008]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a continuous thin plate casting apparatus that does not require large-scale equipment and can easily vary the width of the slab.

[0009]

Means for Solving the Problems The present invention provides the following apparatus to achieve the above object. That is, the present invention provides an endless belt that is stretched between pulleys arranged in a substantially horizontal position with a degree of curvature R, and a plurality of heat-resistant blocks formed along the degree of curvature on both end surfaces of the endless belt. a group of connected heat-resistant blocks configured to be placed on the endless belt and moved in synchronization with the endless belt; a molten metal injection device disposed above the pool formed by the endless belt and the group of connected heat-resistant blocks; This is a single-belt type continuous casting device consisting of an endless belt cooling device disposed below the endless belt, and a thin slab drawing device for drawing out the solidified shell formed on the endless belt to the outside. The present invention will be explained in detail below.

0010

[Operation] The feature of the present invention lies in the shape of the heat-resistant block 5 shown in FIG. In order to obtain a sump that holds a desired amount of molten metal, the interval between the two pulleys disposed substantially horizontally and the radius of curvature R are determined, and the shape of the heat-resistant block 5 is thereby determined. That is, as shown in FIG. 2, the upper edge a of the heat-resistant block 5 is (
Rh), and the lower edge b is formed with a radius of curvature R, and the height h is determined by the maximum depth of the sump. That is, the height h is higher than this maximum depth. Further, the width of the heat-resistant block is made as wide as possible in consideration of the hot water pourer, etc., and the side edge C is determined by this. Note that the radius of curvature R is designed based on the scale of the equipment, the thickness of the slab to be manufactured, the casting speed, etc. The present invention will be further explained using the drawings.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a partially sectional front view of a continuous casting apparatus of the present invention, and FIG. 3 is a sectional view taken along line AA in FIG. In the figure,
Two pulleys 2, 2 are arranged in a substantially horizontal position, and an endless belt 4 is stretched between these pulleys and a tension pulley 3. This endless belt is stretched between two pulleys 2, 2 with a degree of curvature having a radius of curvature R, and forms a curvature zone W. A plurality of heat-resistant blocks 5 are placed above both ends of the endless belt 4 in this curved zone. The heat-resistant blocks 5 have the shape shown in FIG. 2 specified by the radius of curvature R, and are configured to be interconnected and move in synchronization with the endless belt 4, forming a group of connected heat-resistant blocks.

A heat-resistant block guide 7 is provided at the upper edge of the connected heat-resistant block group of the curved zone W, and a pressing tool 7-1
The heat-resistant block group is constantly pressed against the endless belt 4. A plurality of support rolls 6-1 are disposed on the lower surface of the endless belt 4 in the width direction of the endless belt along the degree of curvature of the endless belt to support the curved state of the endless belt in the curving zone. Also, a plurality of cooling pipes 6-2 are provided to similarly cool the endless belt.

Since the curved zone W has the above-described configuration, the heat-resistant block group in this zone maintains the radius of curvature R, and the side edges of each heat-resistant block are in close contact with each other to form a side weir. Together with the endless belt 4, a water reservoir 9 is formed. A molten metal injection container is provided above the molten metal sump 9, and a desired amount of molten metal is injected into the molten metal sump 9.

Since the present invention has such an apparatus, the molten metal 8 injected into the pool 9 is cooled and solidified on the endless belt to form a solidified shell 11, and the movement of the endless belt and the connected heat-resistant block group and was led outside the casting machine 1,
The thin plate 12 is straightened by a roll 13 and then wound by a winding machine 14 to form a coil 15.

[0015]

[Effects of the Invention] As detailed above, the present invention uses a heat-resistant block and an endless belt to form a curved zone to form a pool, making it possible to hold high-quality thin plates without the need for a rear weir. In addition, it has many advantages, such as being able to easily change the width of the slab, which has great operational effects, and also reducing equipment costs due to its advantageous structure.

[Brief explanation of the drawing]

FIG. 1 is a partially sectional front view showing an apparatus of the present invention.

FIG. 2 is a diagram showing a heat-resistant block of the present invention.

FIG. 3 is a sectional view taken along line AA in FIG. 1;

FIG. 4 is a partially sectional front view showing a conventional device.

[Explanation of symbols]

1...Thin plate continuous casting machine 2...Pulley 3...Tension pulley 4...Belt 5...Heat-resistant block 6...Cooling device 7...Heat-resistant block guide 8...Molten metal 9... Hot water pool part 10...Injection container 11... Solidified shell 12...Thin plate 13...Roll 14... Winder 15...Coil

Claims (1)

[Claims] [Claim 1] Between pulleys arranged in a substantially horizontal position,
An endless belt stretched with a degree of curvature having a radius of curvature R, and a plurality of heat-resistant blocks formed along the degree of curvature are placed on both end surfaces of the endless belt and moved in synchronization with the endless belt. a molten metal injection device disposed above the pool formed by the endless belt and the connected heat-resistant block group, an endless belt cooling device disposed below the endless belt, and the endless belt cooling device disposed below the endless belt. A single-belt continuous casting device comprising a thin slab drawing device for drawing out a solidified shell formed on a belt to the outside.