JPS60199558A - Continuous casting installation - Google Patents

Abstract

PURPOSE:To prevent breakout and to enable high-speed casting by using specific walking segments for suitable segments of a route for conveying a steel ingot extending downward from a mold. CONSTITUTION:A route for conveying a steel ingot is constituted of segments 71-718. Roll segments are used for the segments 72, 79, 710 as in the prior art and walking segments are used for all of the remaining segments. The 1st, 2nd blocks 8, 9 which are arranged alternately into a large number along the direction orthogonal with the drawing direction (a) of an ingot 1 and a driving mechanism to move these blocks in the cycle consisting of contact A movement B spacing C return D alternately with respect to the ingot 1 are provided to the respective walking segments. The ingot 1 drawn from a mold 6 is continuously drawn by repetition of the above-described motion of the blocks 8, 9. Since the ingot 1 is alternately supported at the surfaces by the blocks 8, 9, the ingot hardly bulges as creep deformation and even if the bulging arises, the extent thereof is extremely small.

Description

[Detailed description of the invention] Industrial applications The present invention relates to continuous casting equipment.

Structure of the conventional example and its problems In the conventional continuous casting equipment, the slab conveyance path extending downward from the T-ruby is composed of a large number of O-ru segments.

In this conventional configuration, bulging occurs between the %D and LE, which increases the risk of (I) pull-out.
(0) Internal cracks are likely to occur due to an increase in internal strain, and if the casting speed is increased, the shell thickness will become excessive, which will further worsen the problems in (a) and (a) above. There is a limit.

Furthermore, by spray cooling between 0 and 100 ml, the entire slab is not uniformly sprayed with cooling water, resulting in non-uniform cooling, and thermal stress is generated inside and outside the slab. In addition, by reducing the temperature difference between the inside and outside of the slab and reducing the amount of water due to high-temperature extrusion,
Problems (a) and (b) above occur, and there is a limit to the high temperature extrusion caused by slow cooling. In addition, the solidification rate fluctuates due to large temperature differences and non-uniform cooling, resulting in non-uniform internal structure.
Internal defects are likely to occur. In addition, the bottom part of the slab easily gets cold, and in the case of direct rolling insertion, soaking treatment is required.

In addition, near the solidification completion point, fluctuations in the solidification rate due to non-uniform cooling may occur due to factors such as the shearing phenomenon due to the formation of columnar crystals due to cooling over 1,000 liters, shell deformation due to bulging, and abnormal shell deformation due to roll bending. As shown in Figure 1, the unsolidified portion (2) of the slab (1) is enclosed by the shell (3), solidification shrinkage holes are generated, and a center crack (4) is generated.

OBJECTS OF THE INVENTION It is an object of the present invention to provide a continuous casting equipment that overcomes the above-mentioned conventional drawbacks.

Structure of the Invention In order to achieve the above object, the continuous casting equipment of the present invention has a temperature of 1°C.
- The slab conveyance path extending downward from the ruby is composed of a large number of segments, and among the segments, an appropriate one is used as a warping sediment, and the drawing direction of the slab is iμ orthogonal to each A large number of first and second nozzles are alternately arranged along the direction of movement, and the first and second nozzles are brought into contact with the slab alternately -→move'-
) A drive mechanism that performs a cycle of separation and return.

Embodiment and Function An embodiment of the present invention will be described below with reference to FIGS. 2 to 4. This embodiment relates to continuous casting equipment in which the slab conveyance path extending downward from T-ruby (6) is curved.
) to (7, 8) are segments constituting the slab conveyance path, and among the segments (7,) to (7□8), the segment () corresponding to the bending section of the slab (1) is 72
) Segment (79) corresponding to the edict and correction section (7
1G) as roll t dimesito as before, and the other segments (7□), ('ya) ~ (78), (7
++) to (71,) are A-conditions, and each of them is (71), (73) to (78).
), (711) to (7u) are shown in the drawing direction (
B) The first and second blocks (81(9)) are arranged in large numbers alternately along the orthogonal direction, and the first and second blocks (81(9) are 1), the drive mechanism (not shown) alternately performs a cycle of contact (5) → movement (B) → separation (C) → return (1) l. .The second block (8) (9) has an internal water-cooled structure.00 is a roll for inserting and extracting the roller bar, and the roller QO on the front edge side is the roller roll for the roller bar. 'tab allows entry and exit.

■ is a pull-down stand.

The effects of the above configuration will be explained below.

First, insert a bar (not shown) into the slab transport path from the downstream side, clamp the bar with the 0-ru 00, and rotate the 0-ru 00 in one direction. Then, move the third bar in the direction opposite to the slab drawing direction (a), and insert the lead part into the C-ruby (6). Next, pour the molten metal into the 7-ruby (6) and place the dummy bar in the 7-ruby (6).
Pull it in the direction of the arrow (A) to remove the slab (
1) Pull out. Also, at this time, each war + orange sediment (71), (7,) ~ (78), (71°) ~ (T,
, )'s 1st piece (8) comes into contact with the slab (1),
At the same time, the second O-took (9) separates from the slab (1) (C), and the first O-took (8) moves) to move the slab (1) in the direction of arrow (A). At the same time as pulling out the second
- The screw (9) moves backward (D), the first block (8) separates (C) from the slab (1), and at the same time the second block (
9) comes into contact with the slab (1) (5), and the first block (8)
At the same time as the plate returns +D), the second pro-tsuku (9) moves and pulls out the slab (1) in the direction of the arrow (A), and the above operation is repeated to continuously pull out the slab (1). It is extracted by. Also, during this drawing operation, the slab (1) is bent by the upper D-Rusejimeshito (7,), and the lower 0-
The slab (1) is straightened by the sedimentation (7e) (7+o) and pulled out horizontally.

In the above embodiment, the case where the slab conveyance path is curved is explained as an example, but it can also be applied to a case where the path is vertically shaped. There is no need for additional sediment, and all segments can be rubbed with one hour of sediment.

Effects of the Invention As described above, according to the present invention, since the slab is supported by the first and second nozzles alternately in surface contact, bulges do not occur as crease deformation. chestnut,
Even if it occurs, it is extremely small.

Therefore, breakout can be prevented and i-speed casting is possible. Enables uniform cooling and soft cleaning,
The internal quality of slabs (ensure uniform set length of 1 m, evaluation of internal cracks, segregation, etc.) is improved. It is possible to produce slabs at a high temperature by reducing the average temperature difference of the slabs, and it is possible to easily correspond to the direct rolling method that has recently been required, and it is possible to achieve energy saving f-. Center cracking does not occur at the point where the solidification point is completed. Even if the slab is slightly deformed due to the influence of i8, the quality does not deteriorate immediately like in the case of rolls, making maintenance easier, allowing long-term operation, and saving labor. .

[Brief explanation of drawings]

Fig. 1 is a vertical cross-sectional view of the main parts of a conventional example, Figs. 2 to 4 show an embodiment of the present invention, Fig. 2 is a schematic longitudinal cross-sectional view of the entire equipment, and Fig. 3 FIG. 4 is a side view illustrating the middle ring OI click operation, and FIG. 4 is a cross-sectional view of the same. (1)... Slab, (71, 73-71711-71.
)...Worshi Njisesiment, (7!, 7G,
7□. )...0-le segment, (8)...1st
Pollik, (9)...2nd 0゛rik agent Mori
Hiroshi Honzuru

Claims (1)

[Claims] ■Construct the slab conveyance path extending downward from the seventh ruby into a large number of segments, make appropriate segments out of the segments, and insert the slab into each of the λ'-+ inch sediments. A large number of first and 20th grooves arranged alternately along a direction perpendicular to the drawing direction and the first and second grooves are alternately brought into contact with the slab → moved → Continuous casting equipment characterized by having a drive mechanism that performs a cycle of separation and return.