JPS60244452A - Supporting device for maintaining induction heater of vessel for holding molten metal - Google Patents

Abstract

PURPOSE:To repair a tundish provided with an attachable and detachable induction heater without damaging the refractories of the induction heater by providing maintaining devices for attaching and detaching the heater, heating refractories as well as for inspection and repair to the standby position on the casting bed of the tundish. CONSTITUTION:The tundish car 3 carrying the tundish 2 is moved to the standby position 6 or 6' apart from a mold 4 for continuous casting in the stage of moving the car 3 on rails 11 on the mold 4 and repairing the tundish 2 or the induction heater 1 for heating a molten steel provided to the tundish 2 upon ending of the continuous casting operation. The heater 1 is removed from the tundish 2 and the tundish 2 is moved to a repair site where the repair of the refractories, etc. are executed. The heater 1 is maintained by the maintaining and supporting devices 5, 5' consisting of a device 8 for discriminating the erosion of the refractories and reparing the refractories, a heater 9, etc. in the position 6 and is attached to the tundish which is repaired without inducing the damage, etc. of the refractories owing to cooling.

Description

[Detailed Description of the Invention] Technical Field The technical content disclosed in this specification is a method for attaching a bathtub metal holding container, particularly to a tundish of a continuous drafting machine, in a removable manner.
Back song technology No. 81Δ and FIG.
This figure shows a conventional example of an induction heater IOA attached to a wall of No. 1 through flanges 102 and 102'.

This device has a through hole 105 in the center for installing a heating coil iron core 104 passing vertically through it, and is made of a refractory material 107 that is entirely surrounded by an iron shell 106 except for the side facing the tundish 101. It is shaped and has a flange 102' for attachment to the side wall of the tundish 101.

In the refractory 107 section C1, a molten metal 109 to be heated is bored in a groove shape (the planar shape is 11-shaped and both opening ends communicate with the tundish) so as to surround the through hole 105.
Detour passage 1 (explained below using the example of 9M I+)
08 is provided, for example, from the opening communicating with the tundish 101 of the detour passage 108, the molten steel 10 is
9 fills the detour passage 108 and the melt 1 in the tundish
Purchase a closed loop (equivalent to secondary induction coil) that communicates with
The structure is such that the molten steel can be refluxed in a fixed direction by electromagnetic force while being heated to a predetermined temperature at step 11.

Since the tundish 101 and the induction heater 103 hold high-temperature molten steel, the refractory walls are severely damaged and must be repaired frequently.

In this sense, it is desirable to attach and detach the induction heater 108 attached to the tundish 101 at a position along the running track of the tundish car 110, which is important for promoting smooth continuous casting operations. In normal continuous casting operations, in the case of the tundish 101, preparatory work for the tundish, such as repairing the refractory and setting nozzles, is performed at a location away from the cutting bed. It has been found that when attempting to attach and detach the induction heater and tundish, problems arise as described below.

(1) 2 tons of induction heating when returning the tundish-1,01 to the semi-1 yard (standby position) after completion of the process)
Since cooling water needs to flow to 08, the cooling water hose (
(not shown) must be left connected at °C.

(2) When moving Tandish 101 to the preparation yard,
The temperature of the refractory 107 of the induction heater 103 decreases and cracks occur due to volumetric contraction during cooling, and these cracks cause problems such as molten steel being inserted and refractory peeling during the next casting.

OBJECTS AND SUMMARY OF THE INVENTION It is an object of the present invention to overcome the above-mentioned problems by making it possible to perform only cutting with a cutting bed when repairing tundishes and induction heaters. The features of each device of the present invention for achieving this object are as follows: First, a moving molten metal holding container equipped with a removable induction heater is used, and each of the holding containers on the casting bed is Wait (
Facing position 21, the maintenance mechanism for attaching and detaching the induction heater, heating refractories, and inspecting and repairing the induction heater is placed adjacent to each other.Secondly, the removable uL induction heater is A maintenance mechanism for attaching and detaching the induction heater, heating refractories, and inspecting and repairing the above-mentioned induction heater is installed along the running trajectory of the holding container on the casting bed. The structure consists of movable running carts that are movably arranged in parallel.

Structure and Function of the Invention The structure of the present invention will be explained below using an example of a tundish used in continuous casting of scraps and a groove-shaped induction heater (hereinafter simply referred to as an "inductor") as an induction heater.

In the present invention, after the continuous casting process is completed, the inductor 1 is
．． The deterioration of the refractories mainly along the detour path is determined in hot conditions, and heat retention and repairs as necessary are carried out on the cut-out floor near each tundish 2, 2'. be.

In short, the maintenance support rR of the inductor 1, 5゜5
1 to 1. Kundeishka centered around Mold 4 8.
Standby position 6 on the casting bed defined at the running extension position of 8'
, 6/ at the adjacent position. 1st
The figure shows a specific example.

In FIG. 1, each tundish 2, 2 in the standby position
The maintenance support devices 5, 5' adjacent to the inductor attachment/detachment device 7, the refractory melting/hot determination/repair device 8, the heater [9, and the image sensor 1 provided as necessary.
It consists of 0.

Another embodiment of the present invention is as shown in the second illustrated example, and this type is an example of the holding support device 5'' running parallel to the running track 11 of the tundish car 8. In this type, the above-mentioned attachment/detachment device 7, hot determination/repair device 8, and heating device 9 are arranged on a traveling bogie 12, and this traveling bogie 12 runs together with the tundish car 3 along a track 18. In this type, the inductor 1 can be attached or detached anywhere regardless of the parallel position of the tundish 2. For example, when the tundish 214 is exhausted, as in the conventional case, the inductor 1 can be attached or removed with the inductor 1 attached. Moreover, it is no longer necessary to move the casting to the preparation yard outside the casting bed with the cooling water hose connected, making it possible to carry out smooth casting work.

In particular, in the present invention, the refractory can be kept at about 1000-C while the inductor is separated, and it is possible to determine whether the refractory is melted or damaged while traveling. It is also possible to install it at any location.

Effects of the Invention According to the present invention, it is possible to divide the tundish and induction heater into one part in the casting bed at the end of the casting process, and the induction heater is not adversely affected by rapid cooling and is in a healthy state without cracks. Ready for next use. On the other hand, since the kundish can be sent alone to the tundish preparation yard, the refractories can be repaired and the nozzles can be set according to the normal process.

Therefore, smooth operations such as continuous casting operations are ensured, and the life of the induction heater refractory is extended.

[Brief explanation of drawings]

1 and 2 are plan views of support devices for maintenance of induction heaters for continuous casting W1, which are two embodiments of the present invention, and FIG. 3 is a plan view of a continuous tundish equipped with a transmission heater. The front view and FIG. 4 are cross-sectional views of the induction heater. 1... Induction heater (inductor) 2.21... Tundish 3, 3'... Tundish car 4... Mold 5, 5'... Maintenance support device 6... Tundish standby position 7 ... Attachment/detaching device 8... Judgment/repair device 9... Heating device 11.13... Running track 12... Running bogie. Figure 1 f β' Figure 2 Figure 3 Figure 4

Claims (1)

[Claims] 1. For a moving molten metal holding container equipped with a removable induction heater, facing each standby position of the holding container on a clean floor, a A support device for maintaining an induction heater for a molten metal holding container, characterized in that maintenance 4% 174 for heating materials and inspection/repair are arranged adjacent to each other. 2. For a moving molten alpha metal holding container equipped with a removable induction heater, the induction heater is installed and removed, refractory heating, and inspection are performed along the running trajectory of the holding container on the casting bed. A supporting device for maintaining an induction heater of a molten metal holding container, characterized in that traveling carts on which maintenance mechanisms for repair are placed are movably arranged in parallel.