JPS5890356A - Non-sliding continuous casting equipment - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] The present invention relates to a non-sliding continuous casting device.

Conventionally, continuous casting of P-steel has been carried out by injecting molten steel through a nozzle into a vibrating copper mold that is placed directly in the mold, and continuously drawing it out from below.

However, in the ζO method, there is a risk of a so-called breakout in which the solidified shell ruptures during self-drawing of the slab and the molten steel inside flows out due to frictional force acting between the mold and the slab. can only be increased to about 2 m/min at most.

In addition, periodic irregularities called oscillations and marks occur on the surface of the slab, degrading the surface quality.

For this reason, conventionally, non-sliding molds have been proposed in which the surface of the mold moves at the same speed as the slab.

In this typical example, firstly, an endless track is formed using a thin metal belt, and secondly, an endless track is formed by connecting metal boots having a certain degree of rigidity. However, both of these have the following problems.

First, in the method using a thin metal belt, since the belt itself does not have rigidity, it is necessary to apply water pressure from the back side to support the static pressure of molten steel, but this water pressure and the static pressure of molten steel are constantly maintained at d? It is difficult to make the

On the other hand, in the method using connected metal pro-K, molten steel OI
I pressure is given, but ftI push and pull ID11N
There is a problem that the chain is inserted into 1t8 and the surface quality of the slab becomes extremely poor.

The present invention solves these problems and relates to a non-sliding continuous casting mold that can withstand the static pressure of molten steel and does not require insertion of molten steel.

The device of the present invention has a double structure for the endless track, and uses a seamless thin metal belt on the surface that contacts the slab.Furthermore, in order to support the metal belt and remove heat, it uses a metal that is rigid enough to withstand the static pressure of molten steel. 2+2. This is a non-sliding type continuous casting apparatus characterized by using a combined body in which two parts are connected so as to be capable of endless orbital motion.

Next, the present invention will be explained in detail using an embodiment shown in the drawings.

FIG. 1 schematically shows the apparatus of this embodiment. Molten steel is injected into the mold through the tundish 11, which becomes a slab 12, which is then pulled out.The slab contacts the metal belt 13, and
This metal belt is in endless orbital motion by drive or support rolls 14. The outer side of the metal belt is supported by a rigid metal block assembly 15, which is driven by a drive roll 16 in an endless orbital motion at the same speed as the multi-metal belt. 17 is a spray for cooling the endless track.

FIG. 2 shows a cross section of the present embodiment of the apparatus taken in a plane perpendicular to the casting direction. There is. The sides of the cast piece are sandwiched between short pieces 21. As in the present invention, by arranging the metal plate on the outside of the metal belt, the adhesion between the metal belt and the short piece is improved, and the insertion of molten steel into the contact surface 22 between the metal belt and the short piece is improved. Stable casting is possible without any problems.

Figure 3 shows an example of the structure of a metal 1-hole. One possibility is to perform one-through water cooling to cool the metal block and metal belt, but in that case, make a hole 32 in the metal plate as shown in the figure so that the spray can be applied directly to the metal belt. In the figure, 3°1 indicates the belt holding part of the metal block, and arrow a indicates the direction of the slab. or
In order to do this, a structure is created in which negative pressure is applied between the metal belt and the metal plate.
(vx, metal bell) 12) In addition to correcting thermal deformation, it is also considered to maintain a high amount of heat removal.

Both fixed and non-sliding structures are used for the short pieces of the mold. If the thickness of the slab is relatively thin, a fixed short piece or a structure in which ultrasonic vibration is applied to the fixed short piece to reduce friction is sufficient.

In the case of a non-sliding short piece, the direction of the endless orbital motion is
The examples shown in FIGS. 4 and 5 are taken.

FIG. 4 shows a case where the axial direction of the short drive wheel is perpendicular to the axial direction of the long drive wheel. In the figure, 41 #'i is a long mold piece, and 42 represents its drive shaft. Moreover, 43 is a non-sliding type short piece connected with metal blocks, and this is driven by a drive roll 44.

FIG. 5 shows a case where the axial direction of the short driving wheel is parallel to the axial direction of the long driving wheel. 13 is a long piece of metal belt, and 15 is also a long piece of metal block assembly. Reference numeral 51 denotes a combination of metal blocks forming a short piece of the mold, and this is moved in an endless orbit by a drive wheel 52. Short piece drive wheel 52
The axial direction of is arranged parallel to the axial direction of the elongated drive wheel 14.16.

Whether the structure of the non-sliding type short piece is as shown in FIG. 4 or as shown in FIG. 5 can be determined as appropriate depending on the space allocation of each part of the equipment.

In the case of non-sliding short pieces of metal pro-bond type as shown in Figs. 4 and 5, it seems that molten steel may be inserted between the pro-ri and the block of the short piece. The solidification rate of short pieces is fast, and insertion is difficult to occur.Furthermore, even if a small amount of insertion occurs, in the case of short pieces, there is no quality problem.

The use of metal bell tops for the short pieces is of course effective in the present invention.

The continuous casting apparatus of the present invention as described above provides the following effects.

(1) Since the slab is indirectly supported by a rigid body, the support is stable and the equipment is simpler and cheaper than the method of supporting it with hydraulic pressure.

(2) Round, which is a partially continuous metal belt in direct contact with the slab, and the surface quality of the slab is good (no steel inserts).

(3) Since the long pieces of the mold have rigidity, the degree of close contact between the long pieces and the short pieces is good and stable operation is possible.

[Brief explanation of drawings]

FIG. 1 is an explanatory side view of an apparatus according to an embodiment of the present invention, FIG. 2 is an explanatory cross-sectional view of the apparatus in a plane perpendicular to the casting direction, FIG. 3 is a diagram showing an example of the structure of a metal block, and FIG. FIG. 5 is a diagram showing the short piece structure of the mold. ll: Tandissi, 12: Slab 13: Metal belt 14: Metal belt drive or support roll 15: Metal block combination 16: Metal block drive roll 17: Cooling spray, 21: # short piece 22: Contact between metal belt and short piece Surface 31: Metal block belt holding part 33: Pel) K
Hole drilled for direct spray water 41: Mold long piece 42: Long piece drive shaft 43: Non-sliding type short piece 44: Short piece driving roll 51: Non-sliding type short piece
52: Short Piece Driving Roll Procedure Amendment Document Showa Earth July 2nd July 1゛l゛tf'1 Table Small Showa Tam 11 Patent Application No. 1?F?l1/It (#
Relationship with 1 Application Irie Tokoro (residence +su) + Name (phantom A, +
(665) Nippon Steel Corporation 4 Agent I1 Location Higashi+1, Tokyo Fyo I'l1 Ward Marunouchi 2111
No. 6 No. 2 Marunouchi Pier Φzu Hill 330 No, Schiff PItl+l Target g41 Episode 5. +□0. A,';:1+-y month trout &
Contents of the amendment The following matters in the specification of the application will be amended as shown in the attached document. Note 1, page 2, line 14, ``to support, back'' is corrected to ``support, 9th line, J.'' 2, page 2, line 18, K ``Static pressure is applied, but'' ``Static pressure can be supported,'' he corrected. 3L, page 2, lines 19-20 K Correct "Surface quality is extremely poor" to "Surface quality is poor." 1, page 6, bottom line K. Correct the phrase ``perform orbital operation.'' to ``perform orbital motion.''

Claims (1)

[Claims] In non-sliding type continuous casting equipment that moves at the same speed as the slab, the endless track structure that makes up the upper and lower surfaces of the mold is replaced by a seamless thin metal belt on the surface that contacts the slab, and the metal belt A non-sliding type continuous casting device that uses a combination of metal blocks that are rigid enough to withstand molten steel pressure and connected to enable endless orbital movement as a track that supports and removes heat.